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CN-116085760-B - Gas and steam power generation afterburning type thermal decoupling system and working mechanism thereof

CN116085760BCN 116085760 BCN116085760 BCN 116085760BCN-116085760-B

Abstract

A fuel gas and steam power generation afterburning type thermal electrolytic coupling system and a working mechanism thereof are characterized by comprising a fuel gas engine power generation system, a power transmission and transformation system, a molten salt heat storage system and a steam power generation system, wherein the fuel gas engine power generation system is connected with the molten salt heat storage system through a flue gas pipeline, the molten salt heat storage system is connected with the power transmission and transformation system through a cable, the fuel gas engine power generation system is connected with the power transmission and transformation system through a cable, the molten salt heat storage system is connected with the steam power generation system through a main steam pipeline and a water return pipeline, and the steam power generation system is connected with the power transmission and transformation system through a cable. The invention can realize complete decoupling of thermoelectric in the green energy storage system for generating electricity and supplying heat of the combustion engine, realize the functions of autonomous external power supply, green electricity storage or heat supply of the system, increase the capacity of a power grid for absorbing green electricity, and enhance the stability, flexibility and safety of a novel power system.

Inventors

  • HUANG QINGHUA

Assignees

  • 北京工大环能科技有限公司

Dates

Publication Date
20260508
Application Date
20221106

Claims (10)

  1. 1. The gas and steam power generation afterburning type thermoelectric decoupling system is characterized by comprising at least 1 afterburning device (72-2), wherein the afterburning device (72-2) is used for afterburning tail gas generated after power generation of a gas turbine; the section of the high-temperature tail gas discharge flue of the gas turbine is provided with a first smoke pressure line (72-1-1) to a mth smoke pressure line (72-1-m), the pressure of the smoke on the same pressure line is the same, and the positions of the first smoke pressure line (72-1-1) to the mth smoke pressure line (72-1-m) are obtained through numerical simulation calculation; The post-combustion device (72-2) comprises at least 1 first post-combustion nozzle (72-2-1-1), a first post-combustion branch pipe loop (72-2-1-2), a first post-combustion mixing pipe (72-2-1-3), a first post-combustion ignition chamber (72-2-1-4), a first post-combustion ignition observation window (72-2-1-5), a first post-combustion air pipe (72-2-1-6), a first post-combustion air electric valve (72-2-1-7), a first post-combustion electric igniter (72-2-1-8), a first post-combustion gas pipe (72-2-1-9) a first post-combustion gas electric valve (72-2-1-10), at least 1m post-combustion nozzle (72-2-m-1), an m post-combustion branch pipe loop (72-2-m-2), an m post-combustion mixing pipe (72-2-m-3), an m post-combustion ignition chamber (72-2-m-4), an m post-combustion ignition observation window (72-2-m-5), an m post-combustion air pipe (72-2-m-6), an m post-combustion air electric valve (72-2-m-7), an m post-combustion electric igniter (72-2-m-8), the secondary combustion device (72-2) is provided with m secondary combustion branch circuits, secondary combustion mixing pipes, secondary combustion ignition chambers, secondary combustion air pipes, secondary combustion air electric valves, secondary combustion electric igniters, secondary combustion air pipes and secondary combustion gas electric valves, wherein the secondary combustion device (72-2) is provided with m secondary combustion branch circuits, secondary combustion mixing pipes, secondary combustion ignition chambers, secondary combustion air pipes, secondary combustion air electric valves, secondary combustion electric igniters, secondary combustion air pipes and secondary combustion gas electric valves; the axis of the first afterburning branch pipe loop (72-2-1-2) coincides with the first smoke pressure line (72-1-1), and the first afterburning branch pipe loop (72-2-1-2) is a communicated loop; The axis of the first afterburner nozzle (72-2-1-1) is along the flow direction of the flue gas and is perpendicular to the axis of the first afterburner branch pipe loop (72-2-1-2), and the first afterburner nozzle (72-2-1-1) is in through connection with the first afterburner branch pipe loop (72-2-1-2), and a plurality of first afterburner nozzles (72-2-1-1) are uniformly arranged along the axis of the first afterburner branch pipe loop (72-2-1-2); the axis of the first afterburning mixing pipe (72-2-1-3) is connected with the axis of the first afterburning branch pipe loop (72-2-1-2), and the first afterburning mixing pipe (72-2-1-3) is in through connection with the first afterburning branch pipe loop (72-2-1-2); The symmetry line of the first afterburning ignition chamber (72-2-1-4) is connected with the axis of the first afterburning mixing pipe (72-2-1-3) in the same direction, and the first afterburning ignition chamber (72-2-1-4) is connected with the first afterburning mixing pipe (72-2-1-3) in a penetrating way; The first after-burning ignition observation window (72-2-1-5) is arranged on the first after-burning ignition chamber (72-2-1-4) in a manner and in an amount which is convenient for observing the ignition condition in the first after-burning ignition chamber (72-2-1-4) to determine; the axis of the first after-combustion air pipe (72-2-1-6) is in cross oblique connection with the symmetry line of the first after-combustion ignition chamber (72-2-1-4), the first after-combustion air pipe (72-2-1-6) is in oblique through connection with the first after-combustion ignition chamber (72-2-1-4), and a first after-combustion air electric valve (72-2-1-7) is arranged on the first after-combustion air pipe (72-2-1-6) to control the air flow; the axis of the first afterburning gas pipe (72-2-1-9) is connected with the symmetry line of the first afterburning ignition chamber (72-2-1-4) in the same direction, and the first afterburning gas pipe (72-2-1-9) is inserted into the first afterburning ignition chamber (72-2-1-4) for a certain length and then is communicated with the first afterburning ignition chamber, wherein the first afterburning gas pipe (72-2-1-9) is provided with a first afterburning gas electric valve (72-2-1-10) for controlling the flow of fuel gas; one end of the first afterburner (72-2-1-8) is connected with the pipe wall of the first afterburner gas pipe (72-2-1-9) through a wire, at least 1 ignition probe is arranged at the other end of the first afterburner gas pipe, one end of the ignition probe is connected with the first afterburner gas pipe (72-2-1-8) through a wire, the other end of the ignition probe is not contacted with a pipe orifice of the first afterburner gas pipe (72-2-1-9) inserted into the first afterburner ignition chamber (72-2-1-4) for a certain length, and electric sparks are generated after the distance is suitable for being electrified, wherein a low-voltage power supply is arranged in the first afterburner gas pipe (72-2-1-8); The axis of the mth afterburning branch pipe loop (72-2-m-2) coincides with the mth pressure line (72-1-m) of the flue gas, and the mth afterburning branch pipe loop (72-2-m-2) is a communicated loop; The axis of the m-th afterburner nozzle (72-2-m-1) is along the flow direction of the flue gas and is perpendicular to the axis of the m-th afterburner branch pipe loop (72-2-m-2), and the m-th afterburner nozzle (72-2-m-1) is in through connection with the m-th afterburner branch pipe loop (72-2-m-2), and a plurality of m-th afterburner nozzles (72-2-m-1) are uniformly arranged along the axis of the m-th afterburner branch pipe loop (72-2-m-2); The axis of the m-th afterburning mixing pipe (72-2-m-3) is connected with the axis of the m-th afterburning branch pipe loop (72-2-m-2), and the m-th afterburning mixing pipe (72-2-m-3) is in through connection with the m-th afterburning branch pipe loop (72-2-m-2); the symmetry line of the m-th afterburning ignition chamber (72-2-m-4) is connected with the axis of the m-th afterburning mixing pipe (72-2-m-3) in the same direction, and the m-th afterburning ignition chamber (72-2-m-4) is connected with the m-th afterburning mixing pipe (72-2-m-3) in a penetrating way; the m-th post-combustion ignition observation window (72-2-m-5) is arranged on the m-th post-combustion ignition chamber (72-2-m-4) in a manner and in an amount which is convenient for observing the ignition condition in the m-th post-combustion ignition chamber (72-2-m-4) to determine; The axial line of the m-th after-combustion air pipe (72-2-m-6) is in crossed and oblique connection with the symmetry line of the m-th after-combustion ignition chamber (72-2-m-4), the m-th after-combustion air pipe (72-2-m-6) is in oblique through connection with the m-th after-combustion ignition chamber (72-2-m-4), and the m-th after-combustion air pipe (72-2-m-6) is provided with an m-th after-combustion air electric valve (72-2-m-7) for controlling the air flow; The axis of the m-th afterburning gas pipe (72-2-m-9) is connected with the symmetry line of the m-th afterburning ignition chamber (72-2-m-4) in the same direction, the m-th afterburning gas pipe (72-2-m-9) is inserted into the m-th afterburning ignition chamber (72-2-m-4) for a certain length and then is communicated with the m-th afterburning ignition chamber, and the m-th afterburning gas pipe (72-2-m-9) is provided with an m-th afterburning gas electric valve (72-2-m-10) for controlling the flow of gas; One end of the m-th afterburner (72-2-m-8) is connected with the pipe wall of the m-th afterburner gas pipe (72-2-m-9) through a wire, at least 1 ignition probe is arranged at the other end of the m-th afterburner, one end of the ignition probe is connected with the m-th afterburner (72-2-m-8) through a wire, the other end of the ignition probe is not contacted with a pipe orifice of the m-th afterburner gas pipe (72-2-m-9) inserted into the m-th afterburner chamber (72-2-m-4) for a certain length, and the distance is suitable for generating electric sparks after being electrified, and a low-voltage power supply is arranged in the m-th afterburner (72-2-m-8).
  2. 2. The gas and steam power generation afterburning type thermoelectric decoupling system is characterized by comprising an afterburner system (72), wherein the afterburner system (72) is used for afterburning tail gas generated after power generation of a gas turbine; The afterburner system (72) comprises at least 1 afterburner device (72-2), at least 1 afterburner ignition video monitor (72-7), at least 1 afterburner nozzle combustion observation window (72-3), at least 1 afterburner nozzle combustion observation video monitor (72-6), a pre-afterburner flue gas temperature and pressure measuring instrument (72-4) and a post-afterburner flue gas temperature and pressure measuring instrument (72-5); Along the direction of the flue gas, at least 1 hole is formed in the wall of the flue at the downstream of the afterburner device (72-2), and 1 afterburner nozzle combustion observation window (72-3) is embedded in each hole, wherein the afterburner nozzle combustion observation video monitors (72-6) are arranged at a certain position outside the flue, and the arranged positions and the number of the afterburner nozzle combustion observation video monitors can be determined by observing the combustion conditions of all the afterburner nozzles; A post-combustion pre-flue gas temperature and pressure measuring instrument (72-4) is arranged at the upstream of the post-combustion device (72-2), and a probe of the post-combustion pre-flue gas temperature and pressure measuring instrument is inserted into the flue through the flue wall along the radial direction of the flue; The post-combustion flue gas temperature and pressure measuring instrument (72-5) is arranged at the downstream of the post-combustion device (72-2), and the probe of the post-combustion flue gas temperature and pressure measuring instrument is inserted into the flue through the wall of the flue along the radial direction of the flue, so that the combustion condition of the post-combustion nozzle is confirmed without being influenced when the post-combustion flue gas temperature and pressure measuring instrument (72-5) is arranged at the upstream of the combustion observation window (72-3) of the post-combustion nozzle; the post-combustion ignition video monitor (72-7) is arranged at a certain position outside the flue, and the arranged position and the number of the post-combustion ignition video monitor are determined by observing the internal ignition condition of the post-combustion ignition chamber in all the post-combustion devices; The post-combustion nozzle, the post-combustion branch pipe loop and part of the post-combustion mixing pipe in the post-combustion device (72-2) are arranged in the flue, the post-combustion nozzle is distributed on the post-combustion branch pipe loop, the post-combustion branch pipe loop is connected with part of the post-combustion mixing pipe and the inner wall of the flue through the supporting structure, and the post-combustion mixing pipe in the post-combustion device penetrates through the wall of the flue along the radial direction of the flue.
  3. 3. The gas and steam power generation afterburning type thermoelectric decoupling system is characterized by comprising an afterburning type flue gas fused salt heat exchange denitration integrated device, wherein the flue gas is tail gas generated after power generation of a gas turbine; The post-combustion type flue gas fused salt heat exchange and denitration integrated device comprises a post-combustion device system (72) or a post-combustion device (72-2), a primary flue gas fused salt heat exchange component (73-1), a flue gas denitration component (74) and a tertiary flue gas fused salt heat exchange component (73-3); The afterburner system (72) or the afterburner device (72-2) is arranged at a position, close to the inflow position of flue gas, of the afterburner system (72) or the afterburner device (72-2), along the inflow direction of the flue gas, the afterburner system (72) or the afterburner device (72-2) is connected with the primary flue gas molten salt heat exchange assembly (73-1) through a flue gas pipeline (60), the primary flue gas molten salt heat exchange assembly (73-1) is connected with the SCR flue gas denitration assembly (74) through the flue gas pipeline (60), the SCR flue gas denitration assembly (74) is connected with the tertiary flue gas molten salt heat exchange assembly (73-3) through the flue gas pipeline (60), the molten salt inlet of the tertiary flue gas molten salt heat exchange assembly (73-3) is connected with the molten salt outlet of the low-temperature molten salt storage tank (70-2) through the molten salt pipeline (70-0), the molten salt outlet of the tertiary flue gas molten salt heat exchange assembly (73-3) is connected with the molten salt inlet of the primary flue gas molten salt heat exchange assembly (73-1) through the molten salt pipeline (70-0), and the molten salt outlet of the primary molten salt heat exchange assembly (73-1) is connected with the high-temperature flue gas inlet of the molten salt storage tank (70-1).
  4. 4. The gas and steam power generation afterburning type thermoelectric decoupling system is characterized by comprising an afterburning type flue gas purification molten salt heat exchange integrated device (71), wherein the flue gas is tail gas generated after power generation of a gas turbine; the afterburning type flue gas purification molten salt heat exchange integrated device (71) comprises an afterburner system (72) or an afterburning device (72-2), a primary flue gas molten salt heat exchange assembly (73-1), a flue gas decarburization assembly (75), a secondary flue gas molten salt heat exchange assembly (73-2), a flue gas denitration assembly (74) and a tertiary flue gas molten salt heat exchange assembly (73-3); The afterburner system (72) or the afterburner device (72-2) is arranged at a position, close to flue gas inflow, of the afterburner flue gas fused salt heat exchange integrated device (71), along the direction of flue gas inflow, of the afterburner system (72) or the afterburner device (72-2) connected with the primary flue gas fused salt heat exchange assembly (73-1) through the flue gas pipeline (60), the primary flue gas fused salt heat exchange assembly (73-1) is connected with the flue gas decarburization assembly (75) through the flue gas pipeline (60), the flue gas decarburization assembly (75) is connected with the secondary flue gas fused salt heat exchange assembly (73-2) through the flue gas pipeline (60), the secondary flue gas fused salt heat exchange assembly (73-2) is connected with the SCR flue gas denitration assembly (74) through the flue gas pipeline (60), the SCR flue gas denitration assembly (74) is connected with the tertiary flue gas fused salt heat exchange assembly (73-3) through the flue gas pipeline (60), the fused salt inlet of the tertiary flue gas fused salt heat exchange assembly (73-3) is connected with the fused salt outlet of the low-temperature fused salt storage tank (70-2) through the fused salt pipeline (70-0), the fused salt outlet of the tertiary flue gas fused salt heat exchange assembly (73-3) is connected with the secondary flue gas fused salt heat exchange assembly (73-2) through the fused salt pipeline (73-0) The molten salt outlet of the primary flue gas molten salt heat exchange assembly (73-1) is connected with the molten salt inlet of the high-temperature molten salt storage tank (70-1) through a molten salt pipeline (70-0); and the secondary flue gas molten salt heat exchange assembly (73-2) is not arranged when the positions of the flue gas denitration assembly (74) and the flue gas decarburization assembly (75) are interchanged.
  5. 5. The gas and steam power generation afterburning type thermoelectric decoupling system is characterized by comprising a gas turbine power generation system (10), a power transmission and transformation system (30), a molten salt heat storage system (70), a steam power generation system (80) and a waste heat exchanger (110); The gas turbine power generation system (10) is connected with the molten salt heat storage system (70) through a flue gas pipeline (60), the molten salt heat storage system (70) is connected with the waste heat exchanger (110) through the flue gas pipeline (60), the gas turbine power generation system (10) is connected with the power transmission and transformation system (30) through a cable (50), the molten salt heat storage system (70) is connected with the steam power generation system (80) through a main steam pipeline (90) and a water return pipeline (100), and the steam power generation system (80) is connected with the power transmission and transformation system (30) through the cable (50); The fused salt heat storage system (70) comprises a high-temperature fused salt storage tank (70-1), a low-temperature fused salt storage tank (70-2), a fused salt heating device (70-3), a fused salt industrial steam generating device (70-4), a fused salt high-temperature high-pressure steam generating device (70-5) and a post-combustion type flue gas fused salt heat exchange integrated device (71); The low-temperature molten salt storage tank (70-2) is characterized in that a molten salt outlet is connected with a molten salt inlet of the post-combustion type flue gas molten salt heat exchange integrated device (71) through a molten salt pipeline (70-0), the molten salt outlet of the post-combustion type flue gas molten salt heat exchange integrated device (71) is connected with a molten salt inlet of the high-temperature molten salt storage tank (70-1) through a molten salt pipeline (70-0), 3 outlets of the high-temperature molten salt storage tank (70-1) are respectively connected with molten salt inlets of the molten salt heating device (70-3), the molten salt industrial steam generating device (70-4) and the molten salt high-temperature and high-pressure steam generating device (70-5) through molten salt pipelines (70-0), and the molten salt outlets of the molten salt heating device (70-3), the molten salt industrial steam generating device (70-4) and the molten salt high-temperature and high-pressure steam generating device (70-5) are respectively connected with 3 molten salt inlets of the low-temperature molten salt storage tank (70-2) through molten salt pipelines (70-0); The afterburning type flue gas fused salt heat exchange integrated device (71) comprises an afterburner system (72), a primary flue gas fused salt heat exchange assembly (73-1), a secondary flue gas fused salt heat exchange assembly (73-2), a tertiary flue gas fused salt heat exchange assembly (73-3), an SCR flue gas denitration assembly (74) or an SCR flue gas denitration assembly (74) and a flue gas decarburization assembly (75); the afterburned flue gas fused salt heat exchange integrated device (71) is specifically an afterburned flue gas fused salt heat exchange denitration integrated device, wherein an afterburner system (72) is arranged at a position, close to the inflow position of flue gas, of the afterburner system (71), along the inflow direction of flue gas, the afterburner system (72) is connected with a primary flue gas fused salt heat exchange component (73-1) through a flue gas pipeline (60), the primary flue gas fused salt heat exchange component (73-1) is connected with an SCR flue gas denitration component (74) through the flue gas pipeline (60), the SCR flue gas denitration component (74) is connected with a tertiary flue gas fused salt heat exchange component (73-3) through the flue gas pipeline (60), the fused salt inlet of the tertiary flue gas fused salt heat exchange component (73-3) is connected with the fused salt outlet of a low-temperature fused salt storage tank (70-2), the fused salt outlet of the tertiary flue gas fused salt heat exchange component (73-3) is connected with the fused salt inlet of the primary fused salt heat exchange component (73-1) through the fused salt pipeline (70-0), and the fused salt outlet of the primary flue gas heat exchange component (73-1) is connected with the high-temperature storage tank (70-1) through the fused salt pipeline (70-0); Or the afterburning type flue gas molten salt heat exchange integrated device (71) is specifically an afterburning type flue gas purification molten salt heat exchange integrated device, the afterburner system (72) is arranged at a position, close to flue gas inflow, of the afterburning type flue gas molten salt heat exchange integrated device (71), along the direction of flue gas inflow, the afterburner system (72) is connected with the primary flue gas molten salt heat exchange component (73-1) through a flue gas pipeline (60), the primary flue gas molten salt heat exchange component (73-1) is connected with the flue gas decarburization component (75) through a flue gas pipeline (60), the flue gas decarburization component (75) is connected with the secondary flue gas molten salt heat exchange component (73-2) through a flue gas pipeline (60), the secondary flue gas molten salt heat exchange component (73-2) is connected with the SCR flue gas denitration component (74) through a flue gas pipeline (60), the SCR flue gas denitration component (74) is connected with the tertiary flue gas molten salt heat exchange component (73-3) through a flue gas pipeline (60), a molten salt inlet of the tertiary flue salt molten salt heat exchange component (73-3) is connected with a molten salt inlet of the low-temperature molten salt storage tank (70-2) through a molten salt pipeline (70-0), and a secondary flue gas outlet of the molten salt (73-3) is connected with the secondary flue gas heat exchange component (73-2) through the tertiary molten salt heat exchange component (73-0) The mouth is connected with the fused salt inlet of the primary flue gas fused salt heat exchange assembly (73-1) through a fused salt pipeline (70-0), and the fused salt outlet of the primary flue gas fused salt heat exchange assembly (73-1) is connected with the fused salt inlet of the high-temperature fused salt storage tank (70-1) through the fused salt pipeline (70-0).
  6. 6. A gas and steam generating afterburning type thermoelectric decoupling system according to claim 1 or 2, characterized in that: the section of the high-temperature tail gas discharge flue of the gas turbine is provided with a first smoke pressure line (72-1-1) to a mth smoke pressure line (72-1-m), the pressure of the smoke on the same pressure line is the same, and the positions of the first smoke pressure line (72-1-1) to the mth smoke pressure line (72-1-m) are obtained through numerical simulation calculation; the inner contour line (72-1-0) of the section of the flue is a round, square or multi-section closed broken line; The fuel gas in the m-th afterburning gas pipe (72-2-m-9) is combustible gas, atomized combustible gas-liquid mixture, atomized combustible gas powder mixture or atomized combustible gas-liquid powder mixture; the internal cross-sectional contour lines of all the afterburner nozzles in the afterburner device (72-2) are hyperbolic; The axis of a first post-combustion branch pipe loop (72-2-1-2) of the post-combustion device (72-2) coincides with a first pressure line (72-1-1) of the flue gas, the first post-combustion branch pipe loop (72-2-1-2) is a communicated loop, the axis of a first post-combustion nozzle (72-2-1-1) is along the flow direction of the flue gas and is perpendicular to the axis of the first post-combustion branch pipe loop (72-2-1-2), the first post-combustion nozzle (72-2-1-1) is communicated with the first post-combustion branch pipe loop (72-2-1-2), and/or the axis of an m-th post-combustion branch pipe loop (72-2-m-2) coincides with an m-th pressure line (72-1-m) of the flue gas, and the axis of an m-th post-combustion nozzle (72-2-m-1) is communicated with the axis of the post-combustion branch pipe loop (72-2-m-2) along the flow direction and is perpendicular to the m-th post-combustion branch pipe loop (72-2-m-2) and is communicated with the m-th post-combustion branch pipe loop (72-2-m-2); The plurality of first afterburned nozzles (72-2-1-1) are uniformly arranged along an axis of the first afterburned manifold circuit (72-2-1-2) and/or the plurality of m-th afterburned nozzles (72-2-m-1) are uniformly arranged along an axis of the m-th afterburned manifold circuit (72-2-m-2).
  7. 7. A gas and steam power generation post-combustion type thermoelectric decoupling system according to claim 4 or 5 is characterized in that the substances combusted by the gas engine comprise combustible gas, combustible liquid or combustible solid, the combustible gas comprises natural gas, methane, hydrogen, ammonia or organic gas, the combustible liquid comprises gasoline, diesel oil, alcohol or synthetic organic oil, and the combustible solid comprises coal or organic solid.
  8. 8. The fuel gas and steam power generation afterburning type thermoelectric decoupling system according to claim 5, wherein the power transmission and transformation system (30) is connected with an external power grid (40) through a cable (50); electricity generated by the gas turbine power generation system (10) enters an external power grid (40) through a cable (50) and a power transmission and transformation system (30); The flue gas exhausted by the gas turbine power generation system (10) sequentially passes through the post-combustion type flue gas fused salt heat exchange integrated device (71) and the waste heat exchanger (110) through the flue gas pipeline (60) and becomes spent flue gas (20) to be exhausted into air; The electricity generated by the steam power generation system (80) enters an external power grid (40) through a cable (50) and a power transmission and transformation system (30); the external heating demand (130) is connected with the molten salt heating device (70-3) through the heating pipeline (120); The external industrial steam demand (140) is connected to the molten salt industrial steam generating device (70-4) by a thermodynamic line (120).
  9. 9. A working method of a gas and steam power generation afterburning type thermoelectric decoupling system is characterized by comprising the following steps of: the gas and steam power generation afterburning type thermoelectric decoupling system comprises an afterburner system (72), The normal operation of the afterburner system (72) is as follows: The flue gas firstly passes through a flue gas temperature and pressure measuring instrument (72-4) before afterburning at the upstream of an afterburning device (72-2) to measure the temperature and pressure values of the flue gas before afterburning, and the temperature and pressure values of the flue gas before afterburning are transmitted into an intelligent afterburning control system for standby through a transmitter; When the flue gas passes through the afterburner (72-2), the flue gas is heated by the afterburner (72-2) and then continuously flows to the downstream, a video monitor (72-6) for observing the combustion of the afterburner nozzle records the combustion conditions of all nozzles in the afterburner (72-2) through a combustion observation window (72-3) of the afterburner nozzle, video signals are transmitted into an afterburner intelligent control system through a video signal wire, and the results after being analyzed and processed by an AI technology are stored for standby; The post-combustion flue gas temperature and pressure values are measured through a post-combustion flue gas temperature and pressure measuring instrument (72-5) after post-combustion of the post-combustion device (72-2), and are transmitted into an post-combustion intelligent control system through a transmitter for standby; The temperature and pressure values of the flue gas before the afterburning, the temperature and pressure values of the flue gas after the afterburning, the burning conditions of all the nozzles in the afterburning device (72-2) recorded by an afterburning nozzle burning observation video monitor (72-6) stored in the intelligent control system of the incoming afterburning, the results after AI technical analysis and treatment of the burning conditions of all the afterburning ignition chambers in the afterburning device (72-2) recorded by an afterburning ignition video monitor (72-7) stored in the intelligent control system of the incoming afterburning, The first after-burning air electric valve (72-2-1-7), the first after-burning electric igniter (72-2-1-8), the first after-burning gas electric valve (72-2-1-10), the mth after-burning air electric valve (72-2-m-7), the mth after-burning electric igniter (72-2-m-8) and the mth after-burning gas electric valve (72-2-m-10) of the after-burning device (72-2) form a relation linkage, and a control logic is executed by an algorithm in the after-burning intelligent control system; When the smoke needs to be post-combusted, the process from ignition to normal operation of the post-combustion device (72-2) is as follows: When the smoke needs to be post-combusted, an algorithm in the intelligent post-combustion control system sends out a command for opening a first post-combustion air electric valve (72-2-1-7) and/or an mth post-combustion air electric valve (72-2-m-7) of the post-combustion device (72-2), and after 1-2 seconds; An algorithm in the intelligent afterburning control system sends out an instruction that a first afterburning electric igniter (72-2-1-8) of an afterburning device (72-2) and a first afterburning gas electric valve (72-2-1-10) are opened simultaneously, and/or an mth afterburning electric igniter (72-2-m-8) and an mth afterburning gas electric valve (72-2-m-10) are opened simultaneously; At this time, the first afterburning ignition observation window (72-2-1-5) and/or the mth afterburning ignition observation window (72-2-m-5) of the afterburning device (72-2) can observe that the mixed gas in the first afterburning ignition chamber (72-2-1-4) and/or the mth afterburning ignition chamber (72-2-m-4) is ignited, the ignition video information is recorded by an afterburning ignition video monitor (72-7) and then is transmitted to an afterburning intelligent control system for storage, the result of analysis and processing of the video information of the ignition conditions of all the afterburning ignition chambers in the afterburning device (72-2) is a value representing ignition, and after the value is received, an algorithm in the afterburning intelligent control system sends an instruction for closing the first afterburning electric igniter (72-2-1-8) and/or the mth afterburning electric igniter (72-2-m-8); Meanwhile, an algorithm in the intelligent afterburning control system sends out a command for increasing the opening degree, namely the flow rate, of the first afterburning air electric valve (72-2-1-7) and the first afterburning gas electric valve (72-2-1-10) and/or the opening degree, namely the flow rate, of the mth afterburning air electric valve (72-2-m-7) and the mth afterburning gas electric valve (72-2-m-10); The flow rate of the mixed gas in the first afterburning ignition chamber (72-2-1-4) and/or the m-th afterburning ignition chamber (72-2-m-4) of the afterburning device (72-2) is gradually increased, the flow rate of air and fuel gas in the mixed gas is controlled through an algorithm, so that flame flows forwards along with the flow of the mixed gas, the flame sequentially passes through the first afterburning mixing pipe (72-2-1-3) and the first afterburning branch pipe loop (72-2-1-2) along with the flow of the mixed gas, and is sprayed out of all the first afterburning nozzles (72-2-1-1) and/or sequentially passes through the m-th afterburning mixing pipe (72-2-m-3) and the m-th afterburning branch pipe loop (72-2-m-2) and is sprayed out of all the m-th afterburning nozzles (72-2-m-1); At this time, the combustion condition of all the post-combustion nozzle mixture in the post-combustion nozzle combustion observation window (72-3) can be observed, the combustion condition video information is recorded by the post-combustion nozzle combustion observation video monitor (72-6) and then is transmitted to the post-combustion intelligent control system for storage, the combustion condition video information of all the post-combustion nozzle mixture in the post-combustion device (72-2) is analyzed and processed by AI technology to be a value representing that the post-combustion nozzle is ignited, after the value is received, an algorithm in the post-combustion intelligent control system sends out an instruction for keeping the current opening degree of the first post-combustion air electric valve (72-2-1-7) and the first post-combustion gas electric valve (72-2-1-10) and/or the mth post-combustion air electric valve (72-2-m-7) and the mth post-combustion gas electric valve (72-2-m-10); And the result of analysis and treatment of the temperature and pressure values of the flue gas before afterburning and the flue gas after afterburning, which are fed into the afterburning intelligent control system for standby, is used as a reference for judging whether the afterburning system is in normal operation.
  10. 10. A method of operating a gas and steam generation post-combustion type thermocouple system as set forth in claim 5, wherein: Electricity generated by the combustion engine enters an external power grid (40) through a power transmission and transformation system (30) by a cable (50); The waste heat storage process is realized, namely, the flue gas enters a post-combustion type flue gas fused salt heat exchange integrated device (71) after the power generation of the combustion engine, the flue gas exchanges heat with low-temperature fused salt, waste heat in the flue gas heats the low-temperature fused salt into high-temperature fused salt, and the high-temperature fused salt enters a high-temperature fused salt storage tank (70-1) through a fused salt pipeline (70-0) under the action of a fused salt pump; The method comprises the steps that high-temperature molten salt enters a molten salt high-temperature high-pressure steam generating device (70-5) through a molten salt pipeline (70-0) under the action of a molten salt pump, heat exchange is carried out on the high-temperature molten salt and water, the water is changed into high-temperature high-pressure steam, the high-temperature high-pressure steam enters a steam generating system (80) through a main steam pipeline (90) to generate electricity, the generated electricity enters an external power grid (40) through a power transmission and transformation system (30) through a cable (50), the generated high-temperature high-pressure steam is changed into low-pressure steam and/or condensed water returns to a molten salt heat storage system (70) through a water return pipeline (100), and the generated high-temperature high-pressure steam is changed into low-temperature molten salt after heat exchange, and enters a low-temperature molten salt storage tank (70-2) through the molten salt pipeline (70-0) under the action of the molten salt pump; The method comprises the steps of realizing an exothermic heat supply process, namely enabling high-temperature molten salt to respectively enter a molten salt heating device (70-3) and a molten salt industrial steam generating device (70-4) through a molten salt pipeline (70-0) under the action of a molten salt pump, exchanging heat between the high-temperature molten salt and water in the molten salt heating device, enabling hot water or water vapor generated after water exchange to respectively reach and meet an external heating demand (130) and an external industrial steam demand (140) through a heating power pipeline (120), changing the high-temperature molten salt into low-temperature molten salt after heat exchange, and enabling the low-temperature molten salt to enter a low-temperature molten salt storage tank (70-2) through the molten salt pipeline (70-0) under the action of the molten salt pump; The complete decoupling function of the thermoelectric is realized, namely the decoupling of heat storage capacity and the power generation capacity of the fuel engine is realized, the heat energy of the fused salt heat storage system (70) is respectively from the waste heat of the flue gas after the power generation of the fuel engine and the heat energy generated by the afterburner system (72), the coupling relation between the heat storage capacity and the power generation capacity of the fuel engine is relieved, the decoupling of the heat supply capacity and the power generation capacity of the fuel engine is realized, the heat energy of the fused salt heat storage system (70) is respectively from the waste heat of the flue gas after the power generation of the fuel engine and the heat energy generated by the afterburner system (72), the heat release comprises heat release power generation and heat release heat supply, the heat release power generation and heat release power supply are independently operated, and the coupling relation between the heat supply capacity and the power generation capacity of the fuel engine is relieved.

Description

Gas and steam power generation afterburning type thermal decoupling system and working mechanism thereof Technical Field The invention belongs to the technical field of energy-saving transformation of gas power generation, and particularly relates to a gas and steam power generation afterburning type thermal decoupling system and a working mechanism thereof. Background After some coal motor sets are shut down, one part of the functions of the coal motor sets are replaced by a gas heating boiler, and the other part of the functions of the coal motor sets are replaced by a gas power supply heating system. The basic functions of the gas boiler are optimized and improved, so that a mature process technical scheme of a power generation and heat supply system of the gas engine and the waste heat boiler, a heat storage, power generation and heat supply system of the gas engine and the like is formed. Patent CN 215170390U discloses a technical scheme of a natural gas turbine cold-heat-electricity distributed energy station system, which comprises a gas turbine, a waste heat boiler, a steam turbine, a generator, a refrigerating unit and a steam heat exchanger. According to the technical scheme, although the utilization of the waste heat generated by the gas turbine is realized, the cascade utilization of energy sources is realized by adopting a distributed energy utilization technology, and the comprehensive efficiency is improved, the technical scheme does not have the functions of heat storage, energy storage and thermoelectric decoupling. The invention patent CN 108194201A discloses a waste heat utilization system of a gas turbine power plant and an operation method thereof, wherein the system comprises a gas turbine, a first heat exchange system, a heat storage system, a second heat exchange system, a third heat exchange system and a first heat system. Although the technical scheme has the functions of heat storage and energy storage and thermoelectric decoupling to a certain extent, the thermoelectric decoupling of the technical scheme is not thorough, the total heat quantity and the total power generation quantity are still limited in a correlated manner, and independent external heat supply or power supply cannot be realized. Aiming at the technical problems in the technical scheme, the invention can realize the full grading utilization of waste heat, complete decoupling of thermoelectric and autonomous external power supply or heat supply of the system. Disclosure of Invention The invention aims to realize complete thermoelectric decoupling in a green energy storage system for generating electricity and supplying heat by a combustion engine and realize autonomous external power supply or heat supply of the system. The technical scheme of the invention is as follows: A gas and steam power generation afterburning type thermal decoupling system and a working mechanism thereof are characterized in that: comprises at least 1 post-combustion device (72-2), wherein the post-combustion device (72-2) comprises at least 1 first post-combustion nozzle (72-2-1-1), a first post-combustion branch pipe loop (72-2-1-2), a first post-combustion mixing pipe (72-2-1-3), a first post-combustion ignition chamber (72-2-1-4), a first post-combustion ignition observation window (72-2-1-5), a first post-combustion air pipe (72-2-1-6), a first post-combustion air electric valve (72-2-1-7), a first post-combustion electric igniter (72-2-1-8), a first post-combustion air pipe (72-2-1-9), a first post-combustion electric valve (72-2-1-10), at least 1 mth post-combustion nozzle (72-2-m-1), a mth post-combustion branch pipe loop (72-2-m-2), a mth post-combustion mixing pipe (72-2-m-3), a mth post-combustion chamber (72-2-m-2), a mth post-combustion mixing pipe (72-2-m-3), a mth post-combustion chamber (72-2-m-3), a first post-combustion observation window (72-2-m-1-m) and a first post-combustion air pipe (72-2-1-m-3) The secondary combustion device comprises an mth secondary combustion air electric valve (72-2-m-7), an mth secondary combustion electric igniter (72-2-m-8), an mth secondary combustion gas pipe (72-2-m-9) and an mth secondary combustion gas electric valve (72-2-m-10), wherein the secondary combustion device (72-2) is provided with m secondary combustion branch circuits, secondary combustion mixing pipes, secondary combustion ignition chambers, secondary combustion air pipes, secondary combustion air electric valves, secondary combustion electric igniters, secondary combustion gas pipes and secondary combustion gas electric valves in total, wherein m is a natural number; the axis of the first afterburning branch pipe loop (72-2-1-2) coincides with the first smoke pressure line (72-1-1), and the first afterburning branch pipe loop (72-2-1-2) is a communicated loop; The axis of the first afterburner nozzle (72-2-1-1) is along the flow direction of the flue gas and is perpendicular to the axis of the first afterburner branch pip