CN202195714U - Power plant steam-water system with exhaust steam heat exchange system - Google Patents

Power plant steam-water system with exhaust steam heat exchange system Download PDF

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Publication number
CN202195714U
CN202195714U CN2011202657414U CN201120265741U CN202195714U CN 202195714 U CN202195714 U CN 202195714U CN 2011202657414 U CN2011202657414 U CN 2011202657414U CN 201120265741 U CN201120265741 U CN 201120265741U CN 202195714 U CN202195714 U CN 202195714U
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China
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condenser
pressure heater
low
pipeline
exhaust steam
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Expired - Lifetime
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CN2011202657414U
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王昕�
闫平
翁燕珠
邢苍
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Huadian Heavy Industries Co Ltd
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Huadian Heavy Industries Co Ltd
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Abstract

The utility model discloses a power plant steam-water system with an exhaust steam heat exchange system, wherein a boiler, an overheater, a steam turbine, a direct air cooling system, a condensate pump, a condensate water fine treatment device, a low-pressure heater, a deaerator, a water feeding pump and a high-pressure heater are sequentially connected through pipelines, the direct air cooling system comprises a condenser, a cooling fan and a condensate water tank, an exhaust steam leading-out pipeline is arranged on a connecting pipeline of the steam turbine and the direct air cooling system, the exhaust steam leading-out pipeline is connected with the side of a heat pump system, and a heat pump evaporator system is connected with the condensate water tank through a; the condenser side of the heat pump system is connected with a certain stage low-pressure heater or a shaft seal condenser through a water inlet pipeline and a water outlet pipeline. The utility model discloses can effectively reduce the waste of power plant's heat energy to can effectively reduce the energy consumption of power plant's soda system and direct air cooling system.

Description

A kind of power plant's boiler circuit with the exhaust steam heat-exchange system
Technical field
The utility model relates to a kind of power plant boiler circuit, particularly a kind of power plant's boiler circuit with the exhaust steam heat-exchange system.
Background technology
Along with the development of society, human increasing to the demand of electric energy.It is main that present energy resource structure is still with thermal power generation.Serious pollutant emission has been caused simultaneously to the coal resources consume significant in the thermal power plant.In the face of the exhaustion day by day of coal resources, to the growing interest of ecological environment, energy-saving and emission-reduction become important whole society's task.
The vapor recycle cooling system is an important step in the power production process, and the exhaust steam in steam turbine of doing merit need cool off in condenser and condense, then through heat again, send boiler back to after the deoxygenation and recycle.The exhaust steam of power plant steam turbine is the heat exchange action of cooling medium with the air through direct air cooling system, and the exhaust steam heat is discharged in the atmosphere.The release of this heat has not only caused the loss of energy, simultaneously surrounding enviroment has been caused thermal pollution.In the Steam-Water System in Power Plant of existing employing direct air cooling system, the handled exhaust steam amount of air cooling tubes condenser is whole turbine discharge, and air cooling island heat-sink unit volume is big, and power of fan is high, and power load is big, and bigger plant consumption is arranged.
The utility model content
The purpose of the utility model is; A kind of power plant's boiler circuit with the exhaust steam heat-exchange system is provided; Can effectively reduce the waste of exhaust steam of electric power plant heat energy, reduce the station-service electric weight, and can effectively reduce the energy consumption of power plant's boiler circuit, direct air cooling system and the overall cost on Direct Air-Cooled island.
The technical scheme of the utility model: a kind of power plant's boiler circuit with the exhaust steam heat-exchange system; Comprise boiler, superheater, steam turbine, direct air cooling system, condensate pump, the polishing unit that condenses, axle envelope condenser, low-pressure heater, oxygen-eliminating device, feed pump and high-pressure heater; Boiler, superheater, steam turbine, direct air cooling system, condensate pump, the polishing unit that condenses, low-pressure heater, oxygen-eliminating device, feed pump, high-pressure heater connect through pipeline successively; Said direct air cooling system comprises condenser, cooling blower and condensate tank; The connecting line of steam turbine and direct air cooling system is provided with exhaust steam and draws pipeline; Exhaust steam is drawn pipeline and is connected with heat pump, and heat pump is connected with condensate tank through pipeline; Heat pump also is connected with low-pressure heater or axle envelope condenser with outlet conduit through inlet channel.The purpose that increases heat pump is that one side has reduced getting into the exhaust steam amount of direct air cooling system, thereby reduced the number of devices that direct air cooling system comes into operation after the exhaust steam of steam turbine master gland steam exhauster extraction part, cuts down the consumption of energy; Be thermal source with this part exhaust steam of extracting on the other hand; Utilize heat pump that the condensate of taking from certain grade of low-pressure heater inlet or axle envelope condenser inlet side is heated; Improve condensing water temperature, thereby reduce the required extracted steam from turbine consumption of low-pressure heater, and this part amount of drawing gas can be participated in the steam acting link of steam turbine; Improve Efficiency of Steam Turbine, further practiced thrift the energy.
In power plant's boiler circuit of aforesaid band exhaust steam heat-exchange system; Said heat pump comprises evaporimeter, compressor and condenser; Evaporimeter, compressor and condenser are connected through pipeline successively; The admission end of evaporimeter is drawn pipeline with exhaust steam and is connected, and the port of export of evaporimeter is connected with condensate tank through pipeline; The inlet of condenser is connected with the arrival end of certain grade of low-pressure heater through inlet channel, and the liquid outlet of condenser is connected with the port of export of this low-pressure heater through outlet conduit.With the inlet of condenser through inlet channel be connected with the arrival end of low-pressure heater, the liquid outlet of condenser passes through outlet conduit and is connected with the port of export of low-pressure heater; Absorb heat through send into the heat pump condenser from main condensate pipeline extension condensate; And the temperature of raising condensate; Its objective is in order to reduce this grade low-pressure heater condensing capacity, and then reduce the required extracted steam from turbine amount of low-pressure heater.Extracted steam from turbine amount after the minimizing can be used for increasing steam turbine acting steam share and compensate pairing merit value; Under the condition that merit is equal to, the senior more saving of drawing gas, the steam turbine throttle flow of saving is many more; It is also many more to practice thrift coal consumption, thereby reaches the energy-conservation effect of exhaust steam in steam turbine.
In power plant's boiler circuit of aforesaid band exhaust steam heat-exchange system; Low-pressure heater comprises one-level low-pressure heater, secondary low-pressure heater, three grades of low-pressure heaters; The inlet of condenser is connected through the arrival end of any one-level low-pressure heater in inlet channel and one-level low-pressure heater, secondary low-pressure heater or the three grades of low-pressure heaters, and the liquid outlet of condenser passes through outlet conduit and is connected with the port of export of this grade heater.The present technique scheme has only been enumerated one-level low-pressure heater, secondary low-pressure heater and three grades of low-pressure heaters; But needs according to unit capacity and configuration; The low-pressure heater of greater number can be set in system, as: level Four low-pressure heater, Pyatyi low-pressure heater etc.
In power plant's boiler circuit of aforesaid band exhaust steam heat-exchange system; Said heat pump comprises evaporimeter, compressor and condenser; Evaporimeter, compressor and condenser are connected through pipeline successively; The admission end of evaporimeter is drawn pipeline with exhaust steam and is connected, and the port of export of evaporimeter is connected with condensate tank through pipeline; The inlet of condenser is connected through the arrival end of inlet channel with axle envelope condenser, and the liquid outlet of condenser is connected through the port of export of outlet conduit with axle envelope condenser.With the inlet of condenser through inlet channel is connected with the arrival end of axle envelope condenser, the liquid outlet of condenser passes through outlet conduit and is connected with a port of export of envelope condenser; Absorb heat through send into the heat pump condenser from main condensate pipeline extension condensate; Its objective is in order to improve low-pressure heater inlet condensing water temperature behind the condenser that draws gas under the low back pressure condition, thereby reduce the required extracted steam from turbine amount of low-pressure heater.
In power plant's boiler circuit of aforesaid band exhaust steam heat-exchange system, the outlet conduit that is connected with the liquid outlet of condenser is provided with force (forcing) pump.The effect of force (forcing) pump is: after condensate is absorbed heat through condenser, overcome as being sent back to low-pressure heater behind the exhaust steam heat-exchanger rig resistance of bypath system through the force (forcing) pump pressurization.
Compared with prior art, the utility model is owing to increased heat pump, and the part exhaust steam in steam turbine carries out heat exchange through the evaporimeter in the heat pump; Heat discharges to condensate through condenser then; Thereby improved low-pressure heater inlet condensing water temperature, reduced the amount of drawing gas of low-pressure heater consumption steam turbine, reduced the consumption of energy; Extracted steam from turbine amount after the minimizing can be used for increasing steam turbine acting steam share and compensate pairing merit value; The steam turbine throttle flow of practicing thrift is many more, and the saving coal consumption is also many more, thereby reaches the energy-conservation effect of exhaust steam in steam turbine.In addition, because the part exhaust steam is utilized by heat pump, so the exhaust steam heat of direct air cooling system reduces relatively, what dropped on the air cooling island also reduces as the Fan Equipment working quantity, and the power consumption of equipment also decreases.
Description of drawings
Fig. 1 is that the direct air cooling system that is provided with heat pump is simplified boiler circuit figure;
Fig. 2 is the partial structurtes sketch map that condenser is connected with the secondary low-pressure heater;
Fig. 3 is the partial structurtes sketch map that condenser is connected with three grades of low-pressure heaters;
Fig. 4 is the partial structurtes sketch map that condenser is connected with axle envelope condenser.
Being labeled as in the accompanying drawing: 1-boiler, 2-superheater, 3-steam turbine, 4-direct air cooling system, 5-condensate pump; The 6-polishing unit that condenses, 7-low-pressure heater, 8-oxygen-eliminating device, 9-feed pump, 10-high-pressure heater; The 11-condenser, 12-heat pump, 13-condensate tank, 14-evaporimeter, 15-compressor; The 16-condenser, 17-axle envelope condenser, 18-inlet channel, 19-outlet conduit, 20-force (forcing) pump; The 21-cooling blower, pipeline is drawn in the 22-exhaust steam, 71-one-level low-pressure heater, 72-secondary low-pressure heater, three grades of low-pressure heaters of 73-.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described, but not as the foundation to the utility model restriction.
The embodiment 1 of the utility model: as shown in Figure 1; Power plant's boiler circuit of band exhaust steam heat-exchange system; Comprise boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, axle envelope condenser 17, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9 and high-pressure heater 10; Boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9, high-pressure heater 10 connect through pipeline successively; Said direct air cooling system 4 comprises condenser 11, cooling blower 21 and condensate tank 13; The connecting line of steam turbine 3 and direct air cooling system 4 is provided with exhaust steam and draws pipeline 22, and exhaust steam is drawn pipeline 22 and is connected with heat pump 12, and heat pump 12 is connected with condensate tank 13 through pipeline.
Said heat pump 12 comprises evaporimeter 14, compressor 15 and condenser 16; Evaporimeter 14, compressor 15 and condenser 16 are connected through pipeline successively; The admission end of evaporimeter 14 is drawn pipeline 22 with the exhaust steam on the turbine low pressure cylinder outlet gland steam exhauster and is connected, and the port of export of evaporimeter 14 is connected with condensate tank 13 through pipeline; The inlet of condenser 16 is connected with the arrival end of one-level low-pressure heater 71 through inlet channel 18, and the liquid outlet of condenser 16 is connected with the port of export of one-level low-pressure heater 71 through outlet conduit 19.Outlet conduit 19 is provided with force (forcing) pump 20.
The embodiment 2 of the utility model: as shown in Figure 1; Power plant's boiler circuit of band exhaust steam heat-exchange system; Comprise boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, axle envelope condenser 17, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9 and high-pressure heater 10; Boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9, high-pressure heater 10 connect through pipeline successively; Said direct air cooling system 4 comprises condenser 11, cooling blower 21 and condensate tank 13; The connecting line of steam turbine 3 and direct air cooling system 4 is provided with exhaust steam and draws pipeline 22, and exhaust steam is drawn pipeline 22 and is connected with heat pump 12, and heat pump 12 is connected with condensate tank 13 through pipeline.
Said heat pump 12 comprises evaporimeter 14, compressor 15 and condenser 16; Evaporimeter 14, compressor 15 and condenser 16 are connected through pipeline successively; The admission end of evaporimeter 14 is drawn pipeline 22 with exhaust steam and is connected, and the port of export of evaporimeter 14 is connected with condensate tank 13 through pipeline;
As shown in Figure 2, the inlet of condenser 16 is connected with the arrival end of secondary low-pressure heater 72 through inlet channel 18, and the liquid outlet of condenser 16 is connected with the port of export of secondary low-pressure heater 72 through outlet conduit 19.Outlet conduit 19 is provided with force (forcing) pump 20.
The embodiment 3 of the utility model: as shown in Figure 1; Power plant's boiler circuit of band exhaust steam heat-exchange system; Comprise boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, axle envelope condenser 17, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9 and high-pressure heater 10; Boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9, high-pressure heater 10 connect through pipeline successively; Said direct air cooling system 4 comprises condenser 11, cooling blower 21 and condensate tank 13; The connecting line of steam turbine 3 and direct air cooling system 4 is provided with exhaust steam and draws pipeline 22, and exhaust steam is drawn pipeline 22 and is connected with heat pump 12, and heat pump 12 is connected with condensate tank 13 through pipeline.
Said heat pump 12 comprises evaporimeter 14, compressor 15 and condenser 16; Evaporimeter 14, compressor 15 and condenser 16 are connected through pipeline successively; The admission end of evaporimeter 14 is drawn pipeline 22 with exhaust steam and is connected, and the port of export of evaporimeter 14 is connected with condensate tank 13 through pipeline;
As shown in Figure 3, the inlet of condenser 16 is connected with the arrival end of three grades of low-pressure heaters 73 through inlet channel 18, and the liquid outlet of condenser 16 is connected with the port of export of three grades of low-pressure heaters 73 through outlet conduit 19.Outlet conduit 19 is provided with force (forcing) pump 20.
The embodiment 4 of the utility model: as shown in Figure 1; Power plant's boiler circuit of band exhaust steam heat-exchange system; Comprise boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, axle envelope condenser 17, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9 and high-pressure heater 10; Boiler 1, superheater 2, steam turbine 3, direct air cooling system 4, condensate pump 5, the polishing unit 6 that condenses, low-pressure heater 7, oxygen-eliminating device 8, feed pump 9, high-pressure heater 10 connect through pipeline successively; Said direct air cooling system 4 comprises condenser 11, cooling blower 21 and condensate tank 13; The connecting line of steam turbine 3 and direct air cooling system 4 is provided with exhaust steam and draws pipeline 22, and exhaust steam is drawn pipeline 22 and is connected with heat pump 12, and heat pump 12 is connected with condensate tank 13 through pipeline.
Said heat pump 12 comprises evaporimeter 14, compressor 15 and condenser 16; Evaporimeter 14, compressor 15 and condenser 16 are connected through pipeline successively; The admission end of evaporimeter 14 is drawn pipeline 22 with exhaust steam and is connected, and the port of export of evaporimeter 14 is connected with condensate tank 13 through pipeline;
As shown in Figure 4, the inlet of condenser 16 is connected through the arrival end of inlet channel 18 with axle envelope condenser 17, and the liquid outlet of condenser 16 is connected through the port of export of outlet conduit 19 with axle envelope condenser 17.Outlet conduit 19 is provided with force (forcing) pump 20.
The operation principle of the utility model: the exhaust steam part that steam turbine 3 is discharged gets into direct air cooling system 4 through pipeline, and another part is drawn pipeline 22 through exhaust steam and got into heat pump 12.
The exhaust steam and the evaporimeter 14 that get into heat pump 12 carry out heat exchange; The condensate tank 12 that condensed exhaust steam condensate liquid process pipeline is delivered to behind the condenser gets into main condensate water systems; The condenser 16 of heat pump discharges heat to taking from the preceding ducted condensate of main condensate of shaft sealing cooler 17 inlets; After heat absorption heats up, be transported to a port of export of envelope condenser 17 through force (forcing) pump 20; Perhaps before the low-pressure heater inlet of certain one-level, get condensate, send into heat pump 12, turn back to the exit of this grade heater after the heating.
Get into the exhaust steam of direct air cooling system 4; In condenser 11, carry out condensation, become and flow into condensate tank 13 after the condensate, condensate pump 5 is delivered to the removal that condensed water precision processing system 6 carries out soluble salts and metal species impurity with condensate; Getting into low-pressure heater 7 afterwards heats; Through oxygen-eliminating device 8 deoxygenations, boost after high-pressure heater 10 further is delivered to boiler 1 after the pressurization, as the feedwater of boiler then by feed pump 9.

Claims (5)

1. power plant's boiler circuit with the exhaust steam heat-exchange system; Comprise boiler (1), superheater (2), steam turbine (3), direct air cooling system (4), condensate pump (5), the polishing unit that condenses (6), axle envelope condenser (17), low-pressure heater (7), oxygen-eliminating device (8), feed pump (9) and high-pressure heater (10); Boiler (1), superheater (2), steam turbine (3), direct air cooling system (4), condensate pump (5), the polishing unit that condenses (6), low-pressure heater (7), oxygen-eliminating device (8), feed pump (9), high-pressure heater (10) connect through pipeline successively; Said direct air cooling system (4) comprises condenser (11), cooling blower (21) and condensate tank (13); It is characterized in that: the connecting line of steam turbine (3) and direct air cooling system (4) is provided with exhaust steam and draws pipeline (22); Exhaust steam is drawn pipeline (22) and is connected with heat pump (12), and heat pump (12) is connected with condensate tank (13) through pipeline; Heat pump (12) also is connected with low-pressure heater (7) or axle envelope condenser (17) with outlet conduit (19) through inlet channel (18).
2. a kind of power plant's boiler circuit according to claim 1 with the exhaust steam heat-exchange system; It is characterized in that: said heat pump (12) comprises evaporimeter (14), compressor (15) and condenser (16); Evaporimeter (14), compressor (15) and condenser (16) are connected through pipeline successively; The admission end of evaporimeter (14) is drawn pipeline (22) with exhaust steam and is connected, and the port of export of evaporimeter (14) is connected with condensate tank (13) through pipeline; The inlet of condenser (16) is connected with the arrival end of low-pressure heater (7) through inlet channel (18), and the liquid outlet of condenser (16) is connected with the port of export of low-pressure heater (7) through outlet conduit (19).
3. a kind of power plant's boiler circuit according to claim 2 with the exhaust steam heat-exchange system; It is characterized in that: low-pressure heater (7) comprises one-level low-pressure heater (71), secondary low-pressure heater (72), three grades of low-pressure heaters (73); The inlet of condenser (16) is connected through the arrival end of any one-level low-pressure heater in inlet channel (18) and one-level low-pressure heater (71), secondary low-pressure heater (72) or the three grades of low-pressure heaters (73), and the liquid outlet of condenser (16) passes through outlet conduit (19) and is connected with the port of export of this grade heater.
4. a kind of power plant's boiler circuit according to claim 1 with the exhaust steam heat-exchange system; It is characterized in that: said heat pump (12) comprises evaporimeter (14), compressor (15) and condenser (16); Evaporimeter (14), compressor (15) and condenser (16) are connected through pipeline successively; The admission end of evaporimeter (14) is drawn pipeline (22) with exhaust steam and is connected, and the port of export of evaporimeter (14) is connected with condensate tank (13) through pipeline; The inlet of condenser (16) is connected through the arrival end of inlet channel (18) with axle envelope condenser (17), and the liquid outlet of condenser (16) is connected through the port of export of outlet conduit (19) with axle envelope condenser (17).
5. according to claim 2 or 4 described a kind of power plant's boiler circuits with the exhaust steam heat-exchange system, it is characterized in that: the outlet conduit (19) that is connected with the liquid outlet of condenser (16) is provided with force (forcing) pump (20).
CN2011202657414U 2011-07-26 2011-07-26 Power plant steam-water system with exhaust steam heat exchange system Expired - Lifetime CN202195714U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359223A (en) * 2014-11-28 2015-02-18 中国华能集团公司 System and method for using waste steam of steam turbine as thermal medium of air heater of power plant boiler
WO2015021760A1 (en) * 2013-08-12 2015-02-19 天津市万泽电子系统控制技术有限公司 Turbonator-based cooled water treatment system
CN104653242A (en) * 2013-11-18 2015-05-27 舒少辛 Waste heat recovery device for direct air-cooling unit
CN106437906A (en) * 2016-08-16 2017-02-22 华电电力科学研究院 Circulation water waste heat recycling device and method for indirect air cooling unit
CN106437907A (en) * 2016-08-16 2017-02-22 华电电力科学研究院 Direct air cooling unit exhaust steam waste heat recovery device and method
CN107524483A (en) * 2017-06-05 2017-12-29 联合瑞升(北京)科技有限公司 A kind of exhaust steam in steam turbine deriving structure and method
CN109695483A (en) * 2018-05-21 2019-04-30 中电华创电力技术研究有限公司 Direct Air-cooled Unit feed pump turbine cold end system based on absorption heat pump
CN110186218A (en) * 2019-05-10 2019-08-30 华电电力科学研究院有限公司 A kind of Direct Air-cooled Unit exhausted spare heat depth energy saving comprehensive utilization recyclable device and method
CN111485963A (en) * 2019-01-28 2020-08-04 宋惠军 Energy-saving efficient low-emission steam turbine power generation device

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015021760A1 (en) * 2013-08-12 2015-02-19 天津市万泽电子系统控制技术有限公司 Turbonator-based cooled water treatment system
CN104653242A (en) * 2013-11-18 2015-05-27 舒少辛 Waste heat recovery device for direct air-cooling unit
CN104653242B (en) * 2013-11-18 2016-08-24 舒少辛 A kind of Direct Air-cooled Unit waste-heat recovery device
CN104359223A (en) * 2014-11-28 2015-02-18 中国华能集团公司 System and method for using waste steam of steam turbine as thermal medium of air heater of power plant boiler
CN104359223B (en) * 2014-11-28 2015-09-09 中国华能集团公司 System and method using exhaust steam in steam turbine as steam air heater of utility boiler thermal medium
CN106437907A (en) * 2016-08-16 2017-02-22 华电电力科学研究院 Direct air cooling unit exhaust steam waste heat recovery device and method
CN106437906A (en) * 2016-08-16 2017-02-22 华电电力科学研究院 Circulation water waste heat recycling device and method for indirect air cooling unit
CN106437907B (en) * 2016-08-16 2018-08-07 华电电力科学研究院 A kind of Direct Air-cooled Unit exhausted spare heat retracting device and method
CN107524483A (en) * 2017-06-05 2017-12-29 联合瑞升(北京)科技有限公司 A kind of exhaust steam in steam turbine deriving structure and method
CN109695483A (en) * 2018-05-21 2019-04-30 中电华创电力技术研究有限公司 Direct Air-cooled Unit feed pump turbine cold end system based on absorption heat pump
CN111485963A (en) * 2019-01-28 2020-08-04 宋惠军 Energy-saving efficient low-emission steam turbine power generation device
CN110186218A (en) * 2019-05-10 2019-08-30 华电电力科学研究院有限公司 A kind of Direct Air-cooled Unit exhausted spare heat depth energy saving comprehensive utilization recyclable device and method
CN110186218B (en) * 2019-05-10 2023-11-28 华电电力科学研究院有限公司 Deep energy-saving comprehensive utilization and recovery device and method for exhaust steam waste heat of direct air cooling unit

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