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CN-121977369-A - Waste heat recovery system of steam turbine

CN121977369ACN 121977369 ACN121977369 ACN 121977369ACN-121977369-A

Abstract

The invention belongs to the field of steam turbines, in particular to a waste heat recovery system of a steam turbine, which comprises a steam turbine body, wherein one side of the steam turbine body is fixedly connected with an exhaust pipe, one side of the steam turbine body is provided with a treatment box, one end of the exhaust pipe is in a horn shape and is fixedly connected to the side wall of the treatment box, a cleaning mechanism and a heat exchange mechanism are sequentially arranged in the treatment box, a composite filter plate and an active carbon plate are matched to filter larger impurities, the impurities are filtered on one side of the composite filter plate through the composite filter plate, and then the impurities are used for absorbing moisture and oil mist in gas on one hand and absorbing smell in the gas on the other hand when the impurities pass through the active carbon plate, and then the gas flows to one side of the heat exchange mechanism, wherein the composite filter plate is required to start a back blowing mechanism and a vibrating mechanism, the impurities are vibrated to be separated from the inner wall of a filter hole of the composite filter plate through the vibrating mechanism, and finally the impurities fall into an ash falling pipe.

Inventors

  • PENG JIAFEI
  • Ma Yunxuan
  • WU RUISHENG

Assignees

  • 内蒙古华宝固危废环境治理有限公司

Dates

Publication Date
20260505
Application Date
20260305

Claims (10)

  1. 1. A steam turbine waste heat recovery system comprises a steam turbine body (1), wherein one side of the steam turbine body (1) is fixedly connected with an exhaust pipe (2), one side of the steam turbine body (1) is provided with a treatment box (3), one end of the exhaust pipe (2) is in a horn shape and is fixedly connected to the side wall of the treatment box (3), and a cleaning mechanism and a heat exchange mechanism are sequentially arranged in the treatment box (3); The cleaning mechanism is characterized by comprising a composite filter plate (31) and an active carbon plate (38) which are fixedly connected to the inner wall of a treatment box (3), wherein an ash dropping pipe (391) is fixedly connected to the bottom of one end, close to an exhaust pipe (2), of the treatment box (3), a detachable blocking plate (39) is arranged at the bottom of the ash dropping pipe (391), the composite filter plate (31) is arranged on one side, close to the ash dropping pipe (391), of the composite filter plate (31), the active carbon plate (38) is arranged between the composite filter plate (31) and the heat exchange mechanism, a vibration mechanism is arranged on one side, close to the exhaust pipe (2), of the composite filter plate (31) and is used for beating impurities on the composite filter plate (31), and a back blowing mechanism is arranged on one side, close to the active carbon plate (38), of the composite filter plate (31) is used for blowing the impurities to the ash dropping pipe (391).
  2. 2. The steam turbine waste heat recovery system of claim 1, wherein the back blowing mechanism comprises a gas pipe (335), a plurality of gas blowing hoods (336) are arranged on one side, close to the composite filter plate (31), of the gas pipe (335), a fan is externally connected to one side of the gas pipe (335) through a hose, a lifting plate (327) is arranged on one side of the gas pipe (335), the gas pipe (335) is rotatably connected to the side wall of the lifting plate (327) through a rotating shaft, a gear (334) is fixedly connected to one end of the rotating shaft, a side plate (33) is fixedly connected to the side wall of the lifting plate (327), a pen-shaped cylinder (331) is fixedly connected to the side wall of the side plate (33), a push plate (332) is fixedly connected to the output end of the pen-shaped cylinder (331), a rack (333) is fixedly connected to the top of the push plate (332), the rack (333) is meshed with the gear (334), and a driving mechanism is arranged on the lifting plate (327) and is used for driving lifting movement of the lifting plate (327).
  3. 3. The steam turbine waste heat recovery system of claim 2, wherein the driving mechanism comprises an L-shaped plate (32) fixedly connected to the top of the processing box (3), a motor (321) is fixedly connected to the bottom of the L-shaped plate (32), an output shaft of the motor (321) is rotatably connected to the processing box (3) through a bearing, a reciprocating screw (325) is fixedly connected to the output shaft of the motor (321), the reciprocating screw (325) is rotatably connected to the processing box (3) through a bearing, a lifting plate (327) is in threaded connection with the outer side of the reciprocating screw (325), a guide rod (326) is fixedly connected to the inside of the processing box (3), and the lifting plate (327) is slidably connected to the guide rod (326).
  4. 4. The steam turbine waste heat recovery system of claim 3, wherein the vibration mechanism comprises two sliding rods (347) fixedly connected to the side walls of the composite filter plate (31), the sliding rods (347) are connected with a mounting frame (343) in a sliding mode, a push rod (341) is fixedly connected to the top of the mounting frame (343), movable grooves are formed in the side walls of the push rod (341) and the mounting frame (343), buffer rods (345) are connected in the movable grooves in a sliding mode, a plurality of springs (346) are fixedly connected between the buffer rods (345) and the inner walls of the movable grooves, sliding grooves (342) are formed in the tops of the push rods (341), and the sliding grooves (342) are pushed in a reciprocating mode through limiting columns (344).
  5. 5. The steam turbine waste heat recovery system of claim 4, wherein the top of the limit post (344) is rotatably connected with a rotating plate (34) through a pin shaft, one end top of the rotating plate (34) far away from the limit post (344) is fixedly connected with a rotating rod, the rotating rod is rotatably connected to the treatment box (3) through a bearing, the top of the rotating rod is fixedly connected with a second rotating wheel (324), an output shaft of the motor (321) is fixedly connected with a first rotating wheel (322), and a belt (323) is sleeved between the first rotating wheel (322) and the second rotating wheel (324).
  6. 6. The steam turbine waste heat recovery system of claim 5, wherein the heat exchange mechanism comprises two heat exchange plates (351), a plurality of fins (35) are inserted into the heat exchange plates (351), two side walls of the fins (35) are fixedly connected to the inner wall of the treatment box (3), a plurality of guide plates (352) are arranged above and below the heat exchange plates (351), and the guide plates (352) are fixedly connected to the inner wall of the treatment box (3).
  7. 7. The steam turbine waste heat recovery system of claim 6, wherein a first water inlet pipe (310) is fixedly connected to the top end of the heat exchange disc (351) far away from the active carbon plate (38), a first water outlet pipe (41) is fixedly connected to the bottom end of the same heat exchange disc (351), a first water tank (4) is arranged on one side of the treatment tank (3), the first water outlet pipe (41) is fixedly connected to the first water tank (4), a temperature sensor is arranged in the first water tank (4), and a second water outlet pipe (42) is fixedly connected to the bottom end of the first water tank (4).
  8. 8. The steam turbine waste heat recovery system of claim 7, wherein the top of the first water tank (4) is fixedly connected with a three-way pipe (43) in a communicating manner, the bottom of the three-way pipe (43) is fixedly connected with a water pipe, the water pipe extends to the bottom end of the first water tank (4) and is provided with a first valve, one end of the three-way pipe (43) is fixedly connected with a second water inlet pipe (44) in a communicating manner, and the second water inlet pipe (44) is provided with a second valve.
  9. 9. The steam turbine waste heat recovery system of claim 8, wherein a third water inlet pipe (45) is fixedly connected to the other end of the three-way pipe (43) in a communicating mode, a water pump (46) is arranged on the outer side of the third water inlet pipe (45), one end of the third water inlet pipe (45) is fixedly connected to the bottom end of a heat exchange plate (351) close to an activated carbon plate (38) in a communicating mode, a third water outlet pipe (51) is fixedly connected to the top end of the same heat exchange plate (351) in a communicating mode, a second water tank (5) is arranged on the other side of the treatment box (3), the third water outlet pipe (51) is fixedly connected to the second water tank (5) in a communicating mode, and a fourth water outlet pipe (52) is fixedly connected to the side wall of the second water tank (5) in a communicating mode.
  10. 10. The steam turbine waste heat recovery system of claim 9, wherein a mounting box (371) is mounted on the side wall, far away from the exhaust pipe (2), of the processing box (3), an exhaust fan (37) is mounted in the mounting box (371), a dust-proof plate (372) is fixedly connected to the outer wall of the mounting box (371), and a pressure gauge (36) is mounted at the top of the processing box (3).

Description

Waste heat recovery system of steam turbine Technical Field The invention belongs to the field of steam turbines, and particularly relates to a waste heat recovery system of a steam turbine. Background The turbine is a mechanical device for driving a rotating shaft by utilizing heat energy of steam, and realizes expansion and acceleration of the steam through a series of blades, so that the heat energy of the steam is converted into mechanical energy, the high-temperature and high-pressure steam enters the turbine, and then expands and accelerates in a nozzle to form high-speed airflow, the high-speed steam impacts the moving blades to transfer kinetic energy to the moving blades, and the moving blades drive a rotor to rotate, so that the heat energy of the steam is converted into mechanical energy to improve the energy conversion efficiency. One chinese patent with publication number CN105221224a discloses a system for recovering waste heat from steam turbine exhaust. The steam turbine exhaust waste heat recovery system comprises a steam turbine, a direct air cooling unit, a boiler air heater, a water drain tank, a drain pump and a steam exhaust device, wherein the steam turbine is respectively communicated with the direct air cooling unit and the boiler air heater, one path of steam exhausted by the steam turbine is exhausted to the boiler air heater, on one hand, the exhaust pressure of the direct air cooling unit is reduced, the economy of the steam turbine is improved, on the other hand, the temperature of an outlet of the boiler air heater can be improved by the boiler air heater, the temperature of air entering an air preheater is further increased, the wall temperature of the air preheater is increased, low-temperature corrosion can be prevented, and meanwhile, the boiler air heater, the water drain tank, the drain pump unit and the steam exhaust device are sequentially connected, condensed water condensed from the boiler air heater is recovered to the steam exhaust device after passing through the water drain tank and the drain pump unit, and dynamic balance of a backwater circulation and the whole boiler power generation system is ensured. In the prior art, abrasion in the steam turbine, like metal particles can fall off after a rotor or blades run for a long time, in addition, if the water quality is poor, salt or other mineral substances in the water can scale on the inner wall of a pipeline and then fall off into the air flow, if the impurity flows along with exhaust gas, a heat exchange pipeline can be blocked, the heat transfer efficiency is reduced, the energy consumption is increased, and meanwhile, the impurity is deposited at the elbow of the pipeline, and can cause local overheating or even pipe explosion. To this end, the invention provides a steam turbine waste heat recovery system. Disclosure of Invention In order to overcome the deficiencies of the prior art, at least one technical problem presented in the background art is solved. The technical scheme includes that the waste heat recovery system of the steam turbine comprises a steam turbine body, wherein an exhaust pipe is fixedly connected to one side of the steam turbine body, a treatment box is arranged on one side of the steam turbine body, one end of the exhaust pipe is in a horn shape and is fixedly connected to the side wall of the treatment box, a cleaning mechanism and a heat exchange mechanism are sequentially arranged in the treatment box, the cleaning mechanism comprises a composite filter plate fixedly connected to the inner wall of the treatment box and an active carbon plate, an ash dropping pipe is fixedly connected to the bottom of one end of the treatment box, which is close to the exhaust pipe, a detachable blocking plate is arranged at the bottom of the ash dropping pipe, the composite filter plate is arranged at one side, which is close to the ash dropping pipe, the active carbon plate is arranged between the composite filter plate and the heat exchange mechanism, a vibration mechanism is arranged at one side, which is close to the exhaust pipe, of the composite filter plate, which is used for beating impurities on the composite filter plate, and a back blowing mechanism is arranged at one side, which is close to the active carbon plate, is used for blowing the impurities towards the ash dropping pipe. Preferably, the back blowing mechanism comprises a gas pipe, a plurality of gas blowing covers are arranged on one side, close to the composite filter plate, of the gas pipe, a fan is externally connected to one side of the gas pipe through a hose, a lifting plate is arranged on one side of the gas pipe, the gas pipe is rotationally connected to the side wall of the lifting plate through a rotating shaft, a gear is fixedly connected to one end of the rotating shaft, a side plate is fixedly connected to the side wall of the lifting plate, a pen-shaped cylinder is fixedly connected to the side wall of the side plat