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CN-224228738-U - Steam turbine export exhaust steam waste heat recovery system

CN224228738UCN 224228738 UCN224228738 UCN 224228738UCN-224228738-U

Abstract

The utility model discloses a waste heat recovery system for exhaust steam at an outlet of a steam turbine, and relates to the technical field of energy recovery and utilization of the steam turbine. Comprises a steam turbine, a generator, a condenser, an absorption heat pump and a heat supply network system, wherein the generator is connected with a power output end of the steam turbine, the condenser is communicated with a dead steam outlet of the steam turbine, a heat source inlet of the absorption heat pump is communicated with a steam extraction port of the steam turbine through a steam extraction pipeline, a closed circulation waterway is arranged between the absorption heat pump and the condenser, the circulating water in the closed circulating waterway can flow in a bidirectional circulating manner between the condenser and the absorption heat pump, the heat supply network system is connected with the absorption heat pump, the heat supply network system directly heats the heat supply network water by utilizing high-temperature exhaust steam in the absorption heat pump, and the heat supply network water in the heat supply network system can also indirectly exchange heat with the circulating water through the absorption heat pump. The utility model can realize the efficient recovery and reutilization of the exhaust steam waste heat of the steam turbine outlet, and reduce the thermal pollution to the environment.

Inventors

  • MENG XIAOMIN
  • WU JIANGUO

Assignees

  • 内蒙古包钢鑫能源有限责任公司

Dates

Publication Date
20260512
Application Date
20250627

Claims (8)

  1. 1. The utility model provides a steam turbine export exhaust steam waste heat recovery system, includes steam turbine (1), generator (2) that are connected with the power take off end of steam turbine (1), condenser (3) that are linked together with exhaust steam export (11) of steam turbine (1), its characterized in that still includes: The heat source inlet (41) of the absorption heat pump (4) is communicated with the steam extraction port (12) of the steam turbine (1) through a steam extraction pipeline (13), a closed circulation waterway (5) is arranged between the absorption heat pump (4) and the condenser (3), circulating water in the closed circulation waterway (5) can flow in a bidirectional circulating manner between the condenser (3) and the absorption heat pump (4), and the condenser (3) transmits heat released in condensation to the absorption heat pump (4) through the closed circulation waterway (5); The heat supply network system (6), heat supply network system (6) links to each other with absorption heat pump (4), and heat supply network system (6) utilize high temperature exhaust steam in absorption heat pump (4) directly to heat the heat supply network water, heat supply network water in heat supply network system (6) can also carry out heat exchange with circulating water in absorption heat pump (4) indirectly.
  2. 2. The steam turbine outlet exhaust steam waste heat recovery system according to claim 1, wherein the closed circulation water path (5) comprises a closed circulation water pipe (51) and a closed circulation water pump (52), the closed circulation water pipe (51) is divided into a water inlet pipe (511) and a water return pipe (512), the closed circulation water pump (52) is arranged on the water inlet pipe (511) and is used for promoting circulation flow of circulation water in the closed circulation water path (5), wherein, One end of the water inlet pipeline (511) is connected with a first water delivery port (31) of the condenser (3), the other end of the water inlet pipeline is connected with a first water inlet (42) of the absorption heat pump (4), and the condenser (3) transmits heat released in condensation to the absorption heat pump (4) through the water inlet pipeline (511); One end of the water return pipeline (512) is connected with a second water delivery port (43) of the absorption heat pump (4), the other end of the water return pipeline is connected with a second water inlet (32) of the condenser (3), and the absorption heat pump (4) transmits the circulating water subjected to heat exchange to the condenser (3) through the water return pipeline (512).
  3. 3. The steam turbine outlet exhaust steam waste heat recovery system according to claim 2, wherein the temperature difference of circulating water in the water inlet pipeline (511) and the water return pipeline (512) is controlled to be 25-35 ℃.
  4. 4. A steam turbine outlet exhaust steam waste heat recovery system according to any one of claims 1 to 3, wherein the circulating water in the closed circulating water path (5) is demineralized water or soft water.
  5. 5. The exhaust steam waste heat recovery system of the steam turbine outlet according to claim 1, further comprising a boiler (7), wherein the boiler (7) is communicated with a condensate outlet (33) of the condenser (3), a high-temperature steam pipeline (14) communicated with an exhaust steam inlet (15) of the steam turbine (1) is arranged between the boiler (7) and the steam turbine (1), and superheated steam produced in the boiler (7) can be conveyed into the steam turbine (1) through the high-temperature steam pipeline (14).
  6. 6. The steam turbine outlet exhaust steam waste heat recovery system according to claim 5, wherein a water feed pump (8) is arranged between the boiler (7) and a condensate outlet (33) of the condenser (3), and condensate generated by condensation of the condenser (3) is pumped to the boiler (7) through the water feed pump (8).
  7. 7. The steam turbine outlet exhaust steam waste heat recovery system of claim 1, further comprising a heat supply network water pump (61), the heat supply network water pump (61) being capable of pumping heated heat supply network water to the heat supply network system (6).
  8. 8. The steam turbine outlet exhaust steam waste heat recovery system according to claim 1, wherein the extraction pressure in the extraction pipeline (13) is greater than 0.3MPa.

Description

Steam turbine export exhaust steam waste heat recovery system Technical Field The utility model relates to the technical field of energy recycling of turbines, in particular to a waste steam and waste heat recycling system at an outlet of a turbine. Background In industrial production processes involving turbine operation, such as thermal power generation, the exhaust steam from the turbine after power is applied is the largest energy loss. Currently, existing steam turbine exhaust steam generally adopts an open type circulating water treatment system. However, in the operation process of the open type circulating water treatment system, water can be continuously evaporated and discharged into the air, so that a great amount of exhaust steam is lost, and a certain amount of thermal pollution is generated to the environment. Therefore, there is an urgent need for a system that can efficiently recover the exhaust steam energy from the turbine outlet while overcoming the above-mentioned problems. Disclosure of utility model The utility model aims to provide a steam turbine outlet exhaust steam waste heat recovery system so as to solve the problems in the background technology. The utility model provides a technical scheme that the exhaust steam waste heat recovery system comprises a steam turbine, a generator, a condenser, an absorption heat pump and a heat supply network system, wherein the generator is connected with a power output end of the steam turbine, the condenser is communicated with an exhaust steam outlet of the steam turbine, a heat source inlet of the absorption heat pump is communicated with a steam extraction port of the steam turbine through a steam extraction pipeline, a closed circulation waterway is arranged between the absorption heat pump and the condenser, circulating water in the closed circulation waterway can bidirectionally circulate between the condenser and the absorption heat pump, the condenser transfers heat released in condensation to the absorption heat pump through the closed circulation waterway, the heat supply network system is connected with the absorption heat pump, and the heat supply network system directly heats the heat supply network water by utilizing high-temperature exhaust steam in the absorption heat pump, and the heat supply network water in the heat supply network system can also indirectly exchange heat with the circulating water in the absorption heat pump. Based on the technical characteristics, in the utility model, part of exhaust steam at the outlet of the steam turbine is used as a direct heat source for heating heat supply network water to enter the absorption heat pump, the part of exhaust steam can be directly used for heating the heat supply network water in the absorption heat pump, the other part of exhaust steam at the outlet enters the condenser for condensation, the heat released when the part of exhaust steam enters the condenser for condensation can be fully absorbed through the closed circulation waterway, the temperature of the circulating water in the closed circulation waterway is increased after the circulating water absorbs the heat of the part of exhaust steam in the condenser, the circulating water with the increased temperature exchanges heat with the heat supply network water in the absorption heat pump, and then the heat released in the condensation process of the condenser is indirectly transferred to the heat supply network water. Therefore, the utility model can realize the efficient recovery and reutilization of the exhaust steam waste heat of the steam turbine outlet, reduce the thermal pollution to the environment, and has important significance for improving the environment and promoting the green sustainable development. Preferably, the closed circulating water channel comprises a closed circulating water channel and a closed circulating water pump, wherein the closed circulating water channel is divided into a water inlet channel and a water return channel, the closed circulating water pump is arranged on the water inlet channel and is used for promoting circulating water to circulate in the closed circulating water channel, one end of the water inlet channel is connected with a first water delivery port of the condenser, the other end of the water inlet channel is connected with a first water inlet of the absorption heat pump, the condenser is used for transmitting heat released in condensation to the absorption heat pump through the water inlet channel, one end of the water return channel is connected with a second water delivery port of the absorption heat pump, the other end of the water return channel is connected with a second water inlet of the condenser, and the absorption heat pump is used for transmitting the circulating water after heat exchange to the condenser through the water return channel. Based on the technical characteristics, the closed circulating water path formed by the water inlet pipeline, the rec