CN105953424A - Waste heat recovery and heat supply system for power plant - Google Patents

Waste heat recovery and heat supply system for power plant Download PDF

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Publication number
CN105953424A
CN105953424A CN201610273786.3A CN201610273786A CN105953424A CN 105953424 A CN105953424 A CN 105953424A CN 201610273786 A CN201610273786 A CN 201610273786A CN 105953424 A CN105953424 A CN 105953424A
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CN
China
Prior art keywords
power plant
steam
heat
electric power
heating system
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Application number
CN201610273786.3A
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Chinese (zh)
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CN105953424B (en
Inventor
张贵林
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201610273786.3A priority Critical patent/CN105953424B/en
Publication of CN105953424A publication Critical patent/CN105953424A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H4/00Fluid heaters characterised by the use of heat pumps
    • F24H4/02Water heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00Feed-water supply not provided for in other main groups
    • F22D11/02Arrangements of feed-water pumps
    • F22D11/06Arrangements of feed-water pumps for returning condensate to boiler
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Abstract

The invention discloses a waste heat recovery and heat supply system for a power plant. The waste heat recovery and heat supply system for the power plant is used for absorbing waste heat of a power plant boiler (1) and comprises a steam turbine (2) and an absorption heat pump (3), wherein the steam turbine (2) is connected to the power plant boiler (1) and used for sucking steam generated by the power plant boiler (1); the absorption heat pump (3) comprises a generator and a condenser; and the generator is connected with the steam turbine (2) through a first cooling pipeline (4), the first cooling pipeline (4) is connected to the power plant boiler (1) after heat exchange is conducted between the first cooling pipeline (4) and the generator, and the condenser supplies heat to a to-be-heated device (5). By the adoption of the waste heat recovery and heat supply system for the power plant, the problem that in the prior art, waste heat of the power plant is not effectively utilized can be solved.

Description

Residual heat of electric power plant reclaims heating system
Technical field
The present invention relates to heat recovery technical field, more than a kind of power plant Recuperation of heat heating system.
Background technology
" 12 " period is the crucial period that China accelerates transformation of the mode of economic development, to entering One step is strengthened the tied mechanism of target for energy-saving and emission-reduction and is proposed requirements at the higher level.At present, China is existing Power plant's comprehensive energy rate compares relatively low, and majority exists the phenomenon that waste heat waste is serious.In power plant In work process, a large amount of exhaust heats that wherein boiler of power plant produces are substantially all and do not obtain again Utilize, but wasted by recirculating cooling water system, it is true that this partial heat It is that good low-temperature heat source, temperature and flow are the most relatively stable, and water quality is the cleanest, if energy Enough reasonable, primary energy consumption will be greatly reduced, promote power plant's heat capacity, reduce heat supply Investment, reduces environmental pollution.
Summary of the invention
The embodiment of the present invention provides a kind of residual heat of electric power plant reclaim heating system, can solve existing The problem that in technology, residual heat of electric power plant is not utilized effectively.
For achieving the above object, the embodiment of the present invention provides a kind of residual heat of electric power plant to reclaim heating system, For absorbing the waste heat of boiler of power plant, including: steam turbine, it is connected to boiler of power plant, and is used for Suck steam produced by boiler of power plant;Absorption heat pump, including generator and condenser, sends out Raw device is connected with steam turbine by the first cooling line, after the first cooling line and generator heat exchange Being connected to boiler of power plant, condenser is to treating that heating plant carries out heat supply.
As preferably, the first cooling line between generator and boiler of power plant is provided with First condensate tank.
As preferably, steam turbine is connected with generator also by the second cooling line, the second cooling Being provided with steam box on pipeline, the steam (vapor) outlet end of steam box connects with the steam inlet end of generator Connecing, the condensation-water drain end of generator is connected with the condensing water inlet end of steam box.
As preferably, residual heat of electric power plant reclaims heating system and also includes cooling system, cooling system with Absorption type heat parallel connection of pumps, the entrance point of cooling system is connected with the steam (vapor) outlet end of steam box, cold But the port of export of system is connected with the condensing water inlet end of steam box, the entrance point of cooling system and The port of export at least one end is provided with the first control valve.
As preferably, the pipeline between condensation-water drain and the boiler of power plant of steam box is provided with Second condensate tank.
As preferably, treat that heating plant includes cold water pipeline, hot water line and user side, cold water Pipeline is connected between the cooling water inlet end on user side and condenser, and hot water line is connected to use Between hot water outlet end on family end and condenser.
As preferably, it is connected between cold water pipeline and hot water line and has regulation pipeline, regulate pipeline On be provided with regulation valve.
As preferably, hot water line is provided with the second control valve and in parallel with the second control valve Add pipe line, residual heat of electric power plant reclaims heating system and also includes heater, adds pipe line and flows through and add Hot device.
As preferably, the heat source side of heater is connected to the steam output end of steam turbine.
As preferably, the arrival end of boiler of power plant is provided with oxygen-eliminating device.
Application technical scheme, residual heat of electric power plant reclaims heating system and is used for absorbing power plant's pot The waste heat of stove, including: steam turbine, it is connected to boiler of power plant, and is used for sucking boiler of power plant institute The steam produced;Absorption heat pump, including generator and condenser, generator is cold by first But pipeline is connected with steam turbine, is connected to boiler of power plant after the first cooling line and generator heat exchange, Condenser is to treating that heating plant carries out heat supply.Absorption heat pump can absorb the steam of boiler of power plant Waste heat, then is supplied to treat heating plant by this part of waste heat, such that it is able to effectively utilize electricity Factory's waste heat, improves energy utilization rate, reduces energy loss, reduces heat supply investment, reduces Environmental pollution, improves comprehensive utilization of energy rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the residual heat of electric power plant recovery heating system of the embodiment of the present invention.
Description of reference numerals: 1, boiler of power plant;2, steam turbine;3, absorption heat pump;4、 First cooling line;5, heating plant is treated;6, the first condensate tank;7, the second cooling line; 8, steam box;9, cooling system;10, the first control valve;11, the second condensate tank;12、 Cold water pipeline;13, hot water line;14, user side;15, regulation pipeline;16, regulation valve; 17, the second control valve;18, pipe line is added;19, heater;20, oxygen-eliminating device;21, mistake Filter;22, pump machine.
Detailed description of the invention
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings, but does not makees For limitation of the invention.
As it is shown in figure 1, according to embodiments of the invention, residual heat of electric power plant reclaims heating system and is used for Absorb the waste heat of boiler of power plant 1, including: steam turbine 2, it is connected to boiler of power plant 1, and is used for Suck steam produced by boiler of power plant 1;Absorption heat pump 3, including generator and condenser, Generator is connected with steam turbine 2 by the first cooling line 4, the first cooling line 4 and generation Being connected to boiler of power plant 1 after device heat exchange, condenser is to treating that heating plant 5 carries out heat supply.
Absorption heat pump 3 can absorb the steam waste heat of boiler of power plant, then by more than this part Heat is supplied to treat heating plant 5, such that it is able to effectively utilize residual heat of electric power plant, improves utilization of energy Rate, reduces energy loss, reduces heat supply investment, reduces environmental pollution, improves the energy and combines Close utilization rate.Preferably, in the present embodiment, this absorption heat pump is suction-type lithium bromide heat Pump.
Arrange on the first cooling line 4 being preferably located between generator and boiler of power plant 1 There is the first condensate tank 6.Steam in generator and the first cooling line 4 carries out heat exchange, makes Steam in one cooling line 4 can be cooled to condensed water, the steaming in the first cooling line 4 Vapour is during generator heat exchange, it is understood that there may be showing of some vapor not complete heat exchange condensation As, now by the first condensate tank 6, the steam of non-total condensation can be condensed, make Obtain steam and with total condensation, can the most just enter the entrance point of boiler of power plant 1, improve and power plant The exchange capacity of boiler 1.
Steam turbine 2 can also be connected with generator by the second cooling line 7, the second cooling tube Steam box 8 it is provided with, the steam (vapor) outlet end of steam box 8 and the steam inlet end of generator on road 7 Connecting, the condensation-water drain end of generator is connected with the condensing water inlet end of steam box 8.Steam Case 8 can make steam and condensed water carry out heat exchange so that steam can the heat of absorption condensation water, Improve vapor (steam) temperature further, reduce condensate temperature, improve steam heat-exchanging efficiency.
Residual heat of electric power plant reclaims heating system and also includes cooling system 9, cooling system 9 and absorption type heat Pump 3 is in parallel, and the entrance point of cooling system 9 is connected with the steam (vapor) outlet end of steam box 8, cooling The port of export of system 9 is connected with the condensing water inlet end of steam box 8, the import of cooling system 9 End and the port of export at least one end are provided with the first control valve 10.
Cooling system 9 includes cooling tower, and cooling system 9 can be to the steaming flowed out from steam box 8 Vapour carries out condensing heat-exchange, so that the steam flowed out in boiler of power plant 1 more fully condenses, The condensation efficiency of steam can be improved.In actual work process, can regulate as required The aperture of the first control valve 10, thus control the condensing capacity of cooling system 9, and then control to adjust Save the exchange capability of heat between the second cooling line 7 and generator so that residual heat of electric power plant reclaims heat supply System has higher overall efficiency.
Preferably, the pipeline between condensation-water drain and the boiler of power plant 1 of steam box 8 is arranged There is the second condensate tank 11.Second condensate tank 11 can be to through cooling system 9 and absorption Condensed water after heat pump 3 heat exchange condenses again so that the steaming that may contain in condensed water Vapour can be condensed into condensed water more up hill and dale, can play the coldest to boiler of power plant 1 But heat exchange effect.
During actual use, it is cold that residual heat of electric power plant recovery heating system can only arrange first But pipeline 4, it is also possible to the second cooling line 7 is only set, it is also possible to two cooling lines are deposited simultaneously ?.
Treat that heating plant 5 includes cold water pipeline 12, hot water line 13 and user side 14, cold water Pipeline 12 is connected between the cooling water inlet end on user side 14 and condenser, and hot water line 13 It is connected between the hot water outlet end on user side 14 and condenser.Cold water in user side 14 The condensation heat release of absorption heat pump 3 is absorbed in being transported to absorption heat pump 3 by cold water pipeline 12, After cold water in cold water pipeline 12 is heated, it is back to user side 14 through hot water line 13, supplies User takes hot water, can utilize the heat discharged in absorption heat pump heat transfer process easily, Raising energy utilization rate, and this thermal source cleanliness without any pollution, be the recycling to the energy, permissible Reduce energy consumption, reduce environmental pollution.
Preferably, it is connected between cold water pipeline 12 with hot water line 13 and has regulation pipeline 15, adjust Regulation valve 16 it is provided with on pipe joint road 15.Enter needing the hot water temperature in hot water line 13 During row regulation, the aperture of valve 16 can be regulated, thus control in cold water pipeline 12 cold Water carries out the amount mixed with hot water in entering hot water line 13 so that hot water temperature disclosure satisfy that use Family needs, and improves the motility of lower water temperature, improves the comfort level that user uses.
Preferably, hot water line 13 is provided with the second control valve 17 and with the second control valve 17 parallel connections add pipe line 18, residual heat of electric power plant reclaims heating system and also includes heater 19, heating Pipeline 18 flows through heater 19.When the water temperature in hot water line 13 cannot meet user's needs, Now can close the second control valve 17, make hot water flow through in heater 19 heat temperature raising again, So that the water temperature in hot water line 13 disclosure satisfy that user needs.During regulation water temperature, The aperture of the second control valve 17 can also be controlled, thus control to add hot water amount so that water temperature can Preferably meet needs, the heating power consumption of heater 19 can be reduced simultaneously.
Preferably, the heat source side of heater 19 is connected to the steam output end of steam turbine 2, permissible Utilize the steam heat in steam turbine 2 that the hot water in hot water line 13 is reheated, and not Make heater 19 that the hot water in hot water line 13 to be reheated with by modes such as electrical heating, Reduce further energy resource consumption, save the energy.
The arrival end of boiler of power plant 1 is provided with oxygen-eliminating device 20, can be to entering in boiler of power plant 1 Condensed water carry out deoxygenation, it is to avoid boiler of power plant 1 is aoxidized by condensed water, to boiler of power plant 1 Form effectively protection, extend the service life of boiler of power plant 1.
Entrance point at cold water pipeline 12 can also arrange filter 21, thus to user's use Water source filters, it is to avoid foreign material etc. enter water pipe and water pipe is caused damage, also avoid water quality not Totally user's body is damaged, improve safety when system uses.
User side can be multiple, and multiple user sides are arranged in parallel, so that residual heat of electric power plant returns Receive heating system can provide hot water for multiple users simultaneously, more users can be met simultaneously Demand.
In order to ensure to have when system is run enough power, cool down hot water line 13, first Be provided with pump machine 22 at least one of pipeline the 4, second cooling line 7, thus be steam or The flowing of person's water provides enough power, it is ensured that system properly functioning.
Entrance point at boiler of power plant 1 can also arrange pump machine 22, thus in being boiler of power plant 1 Condensate water circulatory provide power.
Certainly, it is above the preferred embodiment of the present invention.It should be pointed out that, and this technology is led For the those of ordinary skill in territory, on the premise of without departing from its general principles, it is also possible to Making some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.

Claims (10)

1. residual heat of electric power plant reclaims a heating system, is used for absorbing the waste heat of boiler of power plant (1), It is characterized in that, including:
Steam turbine (2), is connected to described boiler of power plant (1), and is used for sucking described power plant pot Steam produced by stove (1);
Absorption heat pump (3), including generator and condenser, described generator is cold by first But pipeline (4) is connected with described steam turbine (2), and described first cooling line (4) is with described Being connected to described boiler of power plant (1) after generator heat exchange, described condenser is to treating heating plant (5) Carry out heat supply.
Residual heat of electric power plant the most according to claim 1 reclaims heating system, it is characterised in that position The first cooling line (4) between described generator and described boiler of power plant (1) is upper to be arranged There is the first condensate tank (6).
Residual heat of electric power plant the most according to claim 1 reclaims heating system, it is characterised in that institute State steam turbine (2) to be connected with described generator also by the second cooling line (7), described Steam box (8), the steam (vapor) outlet of described steam box (8) it is provided with on two cooling lines (7) End is connected with the steam inlet end of described generator, the condensation-water drain end of described generator and institute The condensing water inlet end stating steam box (8) connects.
Residual heat of electric power plant the most according to claim 3 reclaims heating system, it is characterised in that institute State residual heat of electric power plant to reclaim heating system and also include cooling system (9), described cooling system (9) with Described absorption heat pump (3) is in parallel, the entrance point of described cooling system (9) and described steam The steam (vapor) outlet end of case (8) connects, the port of export of described cooling system (9) and described steam The condensing water inlet end of case (8) connects, the entrance point of described cooling system (9) and the port of export At least one end is provided with the first control valve (10).
Residual heat of electric power plant the most according to claim 3 reclaims heating system, it is characterised in that institute State and arrange on the pipeline between the condensation-water drain of steam box (8) and described boiler of power plant (1) There is the second condensate tank (11).
Residual heat of electric power plant the most according to any one of claim 1 to 5 reclaims heating system, its Be characterised by, described in treat that heating plant (5) includes cold water pipeline (12), hot water line (13) With user side (14), described cold water pipeline (12) is connected to described user side (14) and described Between cooling water inlet end on condenser, described hot water line (13) is connected to described user side (14) between the hot water outlet end and on described condenser.
Residual heat of electric power plant the most according to claim 6 reclaims heating system, it is characterised in that institute State to be connected between cold water pipeline (12) with described hot water line (13) and have regulation pipeline (15), Regulation valve (16) it is provided with on described regulation pipeline (15).
Residual heat of electric power plant the most according to claim 6 reclaims heating system, it is characterised in that institute State be provided with on hot water line (13) the second control valve (17) and with described second control valve (17) in parallel adding pipe line (18), described residual heat of electric power plant reclaims heating system and also includes heating Device (19), described in add pipe line (18) and flow through described heater (19).
Residual heat of electric power plant the most according to claim 8 reclaims heating system, it is characterised in that institute The heat source side stating heater (19) is connected to the steam output end of described steam turbine (2).
Residual heat of electric power plant the most according to claim 1 reclaims heating system, it is characterised in that The arrival end of described boiler of power plant (1) is provided with oxygen-eliminating device (20).
CN201610273786.3A 2016-04-27 2016-04-27 Residual heat of electric power plant reclaims heating system Active CN105953424B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108087949A (en) * 2017-12-22 2018-05-29 芜湖德司节能科技有限公司 A kind of high-efficiency steam heat supply and residual neat recovering system
CN109681943A (en) * 2018-12-24 2019-04-26 珠海格力电器股份有限公司 Heating system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11173109A (en) * 1997-12-05 1999-06-29 Pado:Kk Power generation and hot water supply system
JP2007064050A (en) * 2005-08-30 2007-03-15 Hitachi Eng Co Ltd Waste heat utilizing facility for steam turbine plant
CN101793171A (en) * 2009-12-21 2010-08-04 江苏双良空调设备股份有限公司 Combined heat and power system for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump
CN102147123A (en) * 2010-02-10 2011-08-10 同方川崎空调设备有限公司 Waste heat recovery type heating system of initial station
CN102149985A (en) * 2008-11-13 2011-08-10 永日泵科技株式会社 Apparatus for recovering vent steam and drain
WO2012032557A1 (en) * 2010-09-06 2012-03-15 株式会社 日立製作所 Gas turbine power generation system
CN203769869U (en) * 2014-01-06 2014-08-13 杭州沃润节能科技有限公司 Waste heat recovery system for power plant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11173109A (en) * 1997-12-05 1999-06-29 Pado:Kk Power generation and hot water supply system
JP2007064050A (en) * 2005-08-30 2007-03-15 Hitachi Eng Co Ltd Waste heat utilizing facility for steam turbine plant
CN102149985A (en) * 2008-11-13 2011-08-10 永日泵科技株式会社 Apparatus for recovering vent steam and drain
CN101793171A (en) * 2009-12-21 2010-08-04 江苏双良空调设备股份有限公司 Combined heat and power system for directly recovering exhaust afterheat of power station steam turbine by absorption heat pump
CN102147123A (en) * 2010-02-10 2011-08-10 同方川崎空调设备有限公司 Waste heat recovery type heating system of initial station
WO2012032557A1 (en) * 2010-09-06 2012-03-15 株式会社 日立製作所 Gas turbine power generation system
CN203769869U (en) * 2014-01-06 2014-08-13 杭州沃润节能科技有限公司 Waste heat recovery system for power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108087949A (en) * 2017-12-22 2018-05-29 芜湖德司节能科技有限公司 A kind of high-efficiency steam heat supply and residual neat recovering system
CN109681943A (en) * 2018-12-24 2019-04-26 珠海格力电器股份有限公司 Heating system

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