CN202141113U - Circulating water parallel connection type heating system for recovering condensing waste heat of auxiliary machine of thermal power plant - Google Patents

Circulating water parallel connection type heating system for recovering condensing waste heat of auxiliary machine of thermal power plant Download PDF

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Publication number
CN202141113U
CN202141113U CN 201120257050 CN201120257050U CN202141113U CN 202141113 U CN202141113 U CN 202141113U CN 201120257050 CN201120257050 CN 201120257050 CN 201120257050 U CN201120257050 U CN 201120257050U CN 202141113 U CN202141113 U CN 202141113U
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CN
China
Prior art keywords
water
heat pump
supply network
absorption heat
cooled condenser
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Withdrawn - After Issue
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CN 201120257050
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Chinese (zh)
Inventor
高妹芬
江荣方
毛洪财
蔡小荣
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Shuangliang Eco Energy Systems Co Ltd
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Shuangliang Eco Energy Systems Co Ltd
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Priority to CN 201120257050 priority Critical patent/CN202141113U/en
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    • 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
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/12Hot water central heating systems using heat pumps

Abstract

The utility model relates to a circulating water parallel connection type heating system for recovering condensing waste heat of an auxiliary machine of a thermal power plant, which comprises an auxiliary steam turbine (1), a first water condensing steam device (2) and absorbing type heat pumps X R 1...n. The absorbing type heat pumps X R 1...n are respectively provided with a subcooler (4), the system is provided with a second water condensing steam device (3), the auxiliary steam turbine (1) is in parallel connection with the first water condensing steam device (2) and the second water condensing steam device (3) in steam exhausting mode, and heat supply network return water is divided into two paths before or after entering the second water condensing steam device (3). One path of the heat supply network return water enters an absorber of the first absorbing type heat pump X R 1,...sequentially connected in serial mode, until the heat supply network return water enters an absorber of the nth absorbing type heat pump X R n, then the heat supply network return water gets out from the absorber of the nth absorbing type heat pump X R n and enters a condenser of the nth absorbing type heat pump X R n, and finally flows out of a condenser of the first absorbing type heat pump X R 1. The other path of the heat supply network return water enters the subcollor (4) of each absorbing type heat pump in parallel connection mode. The circulating water parallel connection type heating system can recover more condensing waste heat of the thermal power plant, improves operating efficiency of a heat pump, and enables a heat supply network system to be more reliable.

Description

Steam power plant reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat
Technical field
The utility model relates to a kind of cogeneration heating system, is applicable to that the auxiliary steam turbine exhaust steam of cogeneration power plant is more energy-conservation, utilizes safely and reliably, and heat network system more utilizes condensation waste heat.
Background technology
Along with the shortage of the energy and the requirement of energy-saving and emission-reduction improve day by day, the comprehensive utilization technique of the energy is in continuous lifting.Urban planning cogeneration in the north carries out central heating, to substitute original independent boiler central heating, realizes the requirement of energy-saving and emission-reduction.Make full use of steam power plant's used heat, to improve the heat capacity of steam power plant, realize energy-saving and emission-reduction better, guarantee the safe and reliable operation of steam power plant and heat supply network simultaneously again, various new flow processs require study.Realize the more auxiliary steam turbine exhaust steam used heat that reclaims in the power plant, the most important condition is that adopting on this basis with the electricity is the source pump of power, or is the absorption type heat pump assembly of power with the heat supply network high-temperature water with the secondary net return water temperature reduction of hot user side.Heat supply network backwater through power plant is confessed carries out refrigeration cool-down, supplies the secondary net to use again as the waste heat source of heat pump, makes the heat supply network return water temperature reduce back telegram in reply factory.Power plant heat supply network backwater is introduced into former plant condenser after getting into power plant, with electric power plant circulating water be blended in heat up in the condenser after, get into absorption heat pump again, see off after in heat pump, heating up.In this system, the temperature that recirculated water goes out heat pump is the keys of heat supply network in many recovery of whole heating season condensation heat, in same outlet temperature, can reclaim more condensation waste heat, and become the another difficult problem of steam power plant's central heating technology with high-grade drawing gas less.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency; A kind of condensation waste heat of realizing reclaiming more steam power plants auxiliary steam turbine is provided, and the operational efficiency of raising heat pump and heat network system be the parallel heating system of recirculated water of steam power plant's recovery subsidiary engine condensation waste heat of reliability service more.
The purpose of the utility model is achieved in that a kind of steam power plant reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat; Comprise auxiliary steam turbine, first water-cooled condenser, vapor-water heat exchanger and absorption heat pump; Said absorption heat pump has the n platform, and n is >=2 natural number, and said absorption heat pump has additional subcooler; The increase of said system has one second water-cooled condenser; Auxiliary steam turbine exhaust steam parallel connection inserts first water-cooled condenser and second water-cooled condenser, and the heat supply network backwater is divided into the absorber that two tunnel: one road heat supply network backwater is introduced into first absorption heat pump before or after entering second water-cooled condenser, get into the absorber of second absorption heat pump again ... Be connected in series successively; Until the absorber that gets into n platform absorption heat pump; The absorber that goes out n platform absorption heat pump gets into the condenser of this n platform absorption heat pump again, then from n-1, n-2 ... Be connected in series successively, the condenser from first absorption heat pump goes out at last; Another road heat supply network backwater parallel connection gets into the subcooler of each absorption heat pump, and two road heat supply network backwater merge at last, directly or again behind vapor-water heat exchanger, see off; The cooling circulating water of said first water-cooled condenser discharge be divided into two the tunnel: the one tunnel be introduced into n platform absorption heat pump evaporimeter; Return successively then; Get into the evaporimeter of second absorption heat pump, first absorption heat pump at last; After first absorption heat pump flows out, return first water-cooled condenser, another road gets into the cooling device of steam power plant.
The utility model steam power plant reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat; The heat supply network backwater gets into and to be divided into two tunnel: one road heat supply network backwater earlier after the steam power plant and to get into second water-cooled condenser, goes out the absorber that gets into first absorption heat pump behind second water-cooled condenser again; Another road heat supply network backwater does not get into second water-cooled condenser and the directly parallelly connected subcooler that gets into each absorption heat pump.
The utility model steam power plant reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat; The heat supply network backwater is introduced into second water-cooled condenser after getting into steam power plant; Be further divided into two the tunnel after going out second water-cooled condenser; One road heat supply network backwater is introduced into each absorption heat pump of serial connection behind the absorber of first absorption heat pump, and another road heat supply network backwater parallel connection gets into the subcooler of each absorption heat pump.
The utility model steam power plant reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat; The subcooler of said each absorption heat pump is merged into a subcooler; The water as refrigerant pipeline parallel connection of each absorption heat pump inserts the subcooler after this merging, and subcooler and another road heat supply network backwater that the heat supply network backwater goes out after this merging merge at last.
The beneficial effect of the utility model is:
Absorption heat pump in steam power plant has increased when subcooler and water-cooled condenser supply heat supply in winter to do heat supply season and has moved.Heat supply network recirculated water and power plant's cool cycles water separation isolated operation.Guaranteed the water quality of hot net water, guaranteed that all kinds of heat transmission equipments can safe and reliable energy-efficient operation.And because cooling circulating water and condensing direct heat transfer, compare with employing cellular-type heat-exchange system and can reclaim used heat more.Adopt heat supply network recirculated water directly to reclaim the COP value that the heat pump waste heat has more effectively improved heat pump.The working steam of heat pump will be practiced thrift more than 8% than original system.Because heat pump has been used high-grade energy less in reclaiming steam power plant's condensation waste heat process; So compare with former heat pump; Under the situation that reclaims same condensation waste heat; The temperature that goes out heat pump is lower than originally, can guarantee that so more heat supply network reclaims condenser heat and realizes maximization when heating demand descends, and is utilizing more auxiliary steam turbine exhaust steam to be used for heating in whole heating season.On the other hand, owing to reclaim same condensation heat, the circulating water temperature that goes out heat pump is low, under same outlet temperature situation, and the recyclable more condensation waste heat of heat pump.Through heat supply network recirculated water and cooling circulating water corresponding series flow in the absorber of each heat pump and condenser and evaporimeter, make the performance of heat pump obtain better optimize.The volume of heat pump, weight indicator can descend greatly, and manufacturing cost can descend simultaneously.On the other hand, because the performance optimization of heat pump, each item economic and technical norms of steam power plant are further enhanced.
Description of drawings
The heat supply network backwater that Fig. 1 (a) relates to for the utility model is shunted before second water-cooled condenser and cooling circulating water parallel connection sketch map.
The heat supply network backwater that Fig. 1 (b) relates to for the utility model is shunted behind second water-cooled condenser and cooling circulating water parallel connection sketch map.
Reference numeral among the figure:
Auxiliary steam turbine 1, first water-cooled condenser (former) 2, second water-cooled condenser (increasing newly) 3, subcooler 4, outlet pipe 5, outlet pipe 6, cooling device 7, heat supply network return branch 8, heat supply network return branch 9, vapor-water heat exchanger 10, main steam turbine extraction steam pipe 11, auxiliary steam turbine exhaust steam pipe 12, auxiliary steam turbine exhaust steam pipe 13, absorption heat pump XR1 ... N.
Heat supply network backwater A, heat supply network water supply A2, main steam turbine draw gas B, high steam C, coagulate water and go out D.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Shown in Fig. 1 (a), the heat supply network backwater that Fig. 1 (a) relates to for the utility model is shunted before second water-cooled condenser and cooling circulating water parallel connection sketch map.Can find out that by Fig. 1 (a) heating system is by auxiliary steam turbine 1, first water-cooled condenser 2, second water-cooled condenser 3, subcooler 4, outlet pipe 5, outlet pipe 6, cooling device 7, heat supply network return branch 8, heat supply network return branch 9, vapor-water heat exchanger 10, main steam turbine extraction steam pipe 11, auxiliary steam turbine exhaust steam pipe 12, auxiliary steam turbine exhaust steam pipe 13, absorption heat pump XR1 ... Compositions such as n and water pump, valve and connecting line.Said absorption heat pump XR1 ... N has the n platform, and n is >=2 natural number.13 parallel connections insert first water-cooled condenser 2 and second water-cooled condenser 3 with auxiliary steam turbine exhaust steam pipe through auxiliary steam turbine exhaust steam pipe 12 respectively in the auxiliary steam turbine exhaust steam; The heat supply network backwater is divided into two the tunnel after getting into power plant: heat supply network return branch 8 and heat supply network return branch 9; One road heat supply network backwater inserts second water-cooled condenser 3, goes out the absorber that second water-cooled condenser 3 back heat supply network return branch 8 get into first absorption heat pump XR1, goes out the absorber that gets into second absorption heat pump XR2 behind the absorber of first absorption heat pump XR1; All the other and the like;, go out the absorber that gets into n platform absorption heat pump XRn behind the absorber of n-1 platform absorption heat pump again, get into the condenser of n platform absorption heat pump XRn again; Get into the condenser of n-1 platform absorption heat pump XR2 then; All the other and the like ..., after the condenser of first absorption heat pump XR1 go out.Just get into the condenser of absorption heat pump XR2 after the minimum absorber from absorption heat pump XR2 of this one road hot net water goes out, go out the condenser that returns absorption heat pump XR1 behind the condenser of absorption heat pump XR2, the condenser from absorption heat pump XR1 goes out at last.This road heat supply network backwater is heated through second water-cooled condenser 3; Again through first absorption heat pump XR1, second absorption heat pump XR2 ... The absorber of n platform absorption heat pump XRn add gentle n platform absorption heat pump XRn ... The condenser of second absorption heat pump XR2, first absorption heat pump XR1 is heated, and the heat supply network return water temperature is raise.Another road heat supply network return branch 9 directly parallel connection gets into each absorption heat pump XR1 ... The subcooler 4 of n, heat exchange heats up in subcooler 4, has taken away the heat of absorption heat pump condensation water as refrigerant, and the heat of the water as refrigerant that the heat pump generator produces has obtained effective utilization.Two road heat supply network backwater merge at last, directly or again after vapor-water heat exchanger 10 heats up, see off.Because water as refrigerant cooling back gets into evaporimeter; Basically eliminated the liquid state loss that water as refrigerant gets into behind the evaporimeter self flash distillation cooling; Make water as refrigerant can all be used for refrigeration, the COP value of heat pump is improved, reached the effect that one action two gets cooling circulating water.The cooling circulating water of first water-cooled condenser 2 (former) of steam power plant is discharged and is divided into two the tunnel: outlet pipe 5 and outlet pipe 6; One road outlet pipe 5 is introduced into the evaporimeter of n platform absorption heat pump XRn; Return successively then; Get into the evaporimeter of second absorption heat pump XR2, first absorption heat pump XR1 at last, heat again from returning first water-cooled condenser 2 after first absorption heat pump XR1 flows out.Another road outlet pipe 6 enters atmosphere to unnecessary heat through cooling device 7.In this system heat supply network recirculated water and cooling circulating water two at the most the series flow in the platform heat pump make the performance of heat pump obtain optimization, each item technical-economic index of power plant's cogeneration operation is further improved.
Shown in Fig. 1 (b), the heat supply network backwater that Fig. 1 (b) relates to for the utility model is shunted behind second water-cooled condenser and cooling circulating water parallel connection sketch map.Fig. 1 (b) is behind second water-cooled condenser, to be divided into two the tunnel after the heat supply network backwater gets into power plant with Fig. 1 (a) difference.
Described heat supply network backwater also can carry out heat exchange with a shared subcooler (not drawing among the figure) of many heat pumps.The water as refrigerant pipeline of each heat pump (not drawing among the figure) is connected in parallel with subcooler, through backheat pump after the subcooler heat release.After heating up in subcooler, the heat supply network backwater merges with another road.

Claims (4)

1. a steam power plant reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat; Comprise auxiliary steam turbine (1), first water-cooled condenser (2), vapor-water heat exchanger (10) and absorption heat pump (XR1 ... N); Said absorption heat pump (XR1 ... N) the n platform is arranged; N is >=2 natural number; It is characterized in that: said absorption heat pump (XR1 ... N) have additional subcooler (4), the increase of said system has one second water-cooled condenser (3), and auxiliary steam turbine (1) exhaust steam parallel connection inserts first water-cooled condenser (2) and second water-cooled condenser (3); The heat supply network backwater is divided into the absorber that two tunnel: one road heat supply network backwater is introduced into first absorption heat pump (XR1) before or after entering second water-cooled condenser (3); Get into the absorber of second absorption heat pump (XR2) again ... Be connected in series successively, until the absorber that gets into n platform absorption heat pump (XRn), the absorber that goes out n platform absorption heat pump (XRn) gets into the condenser of this n platform absorption heat pump (XRn) again; Then from n-1, n-2 ... Be connected in series successively, the condenser from first absorption heat pump (XR1) goes out at last; Another road heat supply network backwater parallel connection gets into each absorption heat pump (XR1 ... N) subcooler (4), two road heat supply network backwater merge at last, directly or again behind vapor-water heat exchanger (10), see off; The cooling circulating water of said first water-cooled condenser (2) discharge be divided into two the tunnel: the one tunnel be introduced into n platform absorption heat pump (XRn) evaporimeter; Return successively then; Get into the evaporimeter of second absorption heat pump (XR2), first absorption heat pump (XR1) at last; After first absorption heat pump (XR1) flows out, return first water-cooled condenser (2), another road gets into the cooling device (7) of steam power plant.
2. a kind of steam power plant according to claim 1 reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat; It is characterized in that: the heat supply network backwater gets into and to be divided into two tunnel: one road heat supply network backwater earlier after the steam power plant and to get into second water-cooled condenser (3), goes out the absorber that gets into first absorption heat pump (XR1) behind second water-cooled condenser (3) again; Another road heat supply network backwater does not get into second water-cooled condenser (3) and directly parallelly connected each absorption heat pump (XR1 that gets into ... N) subcooler (4).
3. a kind of steam power plant according to claim 1 reclaims the parallel heating system of recirculated water of subsidiary engine condensation waste heat; It is characterized in that: the heat supply network backwater is introduced into second water-cooled condenser (3) after getting into steam power plant; Be further divided into two the tunnel after going out second water-cooled condenser (3); One road heat supply network backwater is introduced into serial connection each absorption heat pump (XRn) behind the absorber of first absorption heat pump (XR1), and another road heat supply network backwater parallel connection gets into each absorption heat pump (XR1 ... N) subcooler (4).
4. reclaim the parallel heating system of recirculated water of subsidiary engine condensation waste heats according to claim 1 or 2 or 3 described a kind of steam power plants; It is characterized in that: said each absorption heat pump (XR1 ... N) subcooler (4) is merged into a subcooler; Each absorption heat pump (XR1 ... N) water as refrigerant pipeline parallel connection inserts the subcooler after this merging, and subcooler and another road heat supply network backwater that the heat supply network backwater goes out after this merging merge at last.
CN 201120257050 2011-07-20 2011-07-20 Circulating water parallel connection type heating system for recovering condensing waste heat of auxiliary machine of thermal power plant Withdrawn - After Issue CN202141113U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120257050 CN202141113U (en) 2011-07-20 2011-07-20 Circulating water parallel connection type heating system for recovering condensing waste heat of auxiliary machine of thermal power plant

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Application Number Priority Date Filing Date Title
CN 201120257050 CN202141113U (en) 2011-07-20 2011-07-20 Circulating water parallel connection type heating system for recovering condensing waste heat of auxiliary machine of thermal power plant

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102331023A (en) * 2011-07-20 2012-01-25 双良节能系统股份有限公司 Recycled water parallel heat supply system for recycling condensation waste heat of auxiliary machine in thermal power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102331023A (en) * 2011-07-20 2012-01-25 双良节能系统股份有限公司 Recycled water parallel heat supply system for recycling condensation waste heat of auxiliary machine in thermal power plant
CN102331023B (en) * 2011-07-20 2013-05-01 双良节能系统股份有限公司 Recycled water parallel heat supply system for recycling condensation waste heat of auxiliary machine in thermal power plant

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Granted publication date: 20120208

Effective date of abandoning: 20130501