CN202182506U - Combined heat supply system for recycling condenser heat of main engine and auxiliary engine of thermal power plant - Google Patents

Combined heat supply system for recycling condenser heat of main engine and auxiliary engine of thermal power plant Download PDF

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Publication number
CN202182506U
CN202182506U CN2011202687000U CN201120268700U CN202182506U CN 202182506 U CN202182506 U CN 202182506U CN 2011202687000 U CN2011202687000 U CN 2011202687000U CN 201120268700 U CN201120268700 U CN 201120268700U CN 202182506 U CN202182506 U CN 202182506U
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China
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water
heat
heat pump
supply network
power plant
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Withdrawn - After Issue
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CN2011202687000U
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Chinese (zh)
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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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    • 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

Abstract

The utility mode relates to a combined heat supply system for recycling condenser heat of a main engine and an auxiliary engine of a thermal power plant, which comprises the following components: an extraction/condensing steam turbine (1), a main steam turbine steam extraction pipe (3), a first water cooling condenser (5), an auxiliary steam turbine (6), a second water cooling condenser (7), a water-water heat exchanger (8), subcoolers (9), a steam-water heat exchanger (10) and an absorption type heat pump. Heat supply network backwater is divided into two paths before or after entering the water-water heat exchanger (8). After the first path of heat network backwater firstly enters an absorber of a first absorptive heat pump (XR1), the absorptive heat pumps (XR1...n) are connected in series. After the backwater comes out of the absorber of a n-th absorptive heat pump (XRn), the backwater enters the condenser of the n-th absorptive heat pump. Then the condensers of the absorptive heat pumps are connected in series. The other path of heat supply network backwater enters subcoolers (9) of the absorptive heat pumps in parallel. After the two paths of heat supply network backwater are finally combined, the combined backwater is sent out directly or after being heated. The combined heat supply system can recycle more condenser heat of the thermal power plant. Furthermore the combined heat supply system improves operation efficiency of the heat pump and causes more reliable operation of the heat network system.

Description

Steam power plant reclaims main and auxiliary machine condensation waste heat combined type heating system
Technical field
The utility model relates to a kind of cogeneration heating system, is applicable to that the main and auxiliary exhaust steam in steam turbine 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 turbine discharge 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, and a kind of condensation waste heat of realizing reclaiming more steam power plants is provided, and the operational efficiency of raising heat pump and the heat network system more steam power plant of reliability service reclaim main and auxiliary machine condensation waste heat combined type heating system.
The purpose of the utility model is achieved in that a kind of steam power plant reclaims main and auxiliary machine condensation waste heat combined type heating system; Comprise sucking condensing turbine, main steam turbine extraction steam pipe, first and second water-cooled condenser, auxiliary steam turbine, vapor-water heat exchanger and absorption heat pump; Said absorption heat pump has the n platform, and n is >=2 natural number.High steam is extracted the thermal source of part steam as absorption heat pump and vapor-water heat exchanger out in sucking condensing turbine work done generating back.Main and auxiliary exhaust steam in steam turbine condenses into water by condenser, and condensation waste heat is recycled.It is characterized in that: described absorption heat pump has additional subcooler, in steam power plant, increases a water water-to-water heat exchanger, and the auxiliary steam turbine exhaust steam inserts second water-cooled condenser.The heat supply network backwater is divided into two the tunnel before or after entering water water-to-water heat exchanger; One road heat supply network backwater is introduced into the absorber of first absorption heat pump, gets 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; Go out the condenser that gets into this n platform absorption heat pump behind the absorber of n platform absorption heat pump again; Then from n-1, n-2 ... Be connected in series successively, from the condenser of first absorption heat pump, flow out at last, another road heat supply network backwater is the subcooler of each absorption heat pump of parallel connection entering respectively; Two road heat supply network backwater merge at last, directly or again behind vapor-water heat exchanger, see off.The cooling circulating water of first water-cooled condenser is divided into two tunnel: one road evaporimeter connection of access n platform absorption heat pump earlier after going out said first water-cooled condenser; Return successively then; Get into the evaporimeter of second, first absorption heat pump; From the evaporimeter of first absorption heat pump, go out at last, return first water-cooled condenser; The cooling system of steam power plant is inserted on another road; The cooling circulating water of second water-cooled condenser goes out the cooling system that parallel connection behind described second water-cooled condenser inserts water water-to-water heat exchanger and steam power plant.The cooling system of steam power plant can be that air and this first water-cooled condenser go out water direct heat-exchange, also can be that the air and the first water-cooled condenser water outlet indirect exchange enter atmosphere with heat.
The utility model steam power plant reclaims main and auxiliary machine condensation waste heat combined type heating system; Said heat supply network backwater is divided into two tunnel: one road heat supply network backwater entering water water-to-water heat exchanger earlier after getting into steam power plant; Get into the absorber of first absorption heat pump behind the water outlet water-to-water heat exchanger again, another road heat supply network backwater does not get into the water water-to-water heat exchanger and the directly parallelly connected subcooler that gets into each absorption heat pump.
The utility model steam power plant reclaims main and auxiliary machine condensation waste heat combined type heating system; Said heat supply network backwater gets into advanced entry water-to-water heat exchanger after the steam power plant; Be further divided into the absorber of first absorption heat pump of two tunnel: one tunnel entering behind the water outlet water-to-water heat exchanger, another road parallel connection gets into the subcooler of each absorption heat pump.
The utility model steam power plant reclaims main and auxiliary machine condensation waste heat combined type heating system; 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 utility model steam power plant reclaims main and auxiliary machine condensation waste heat combined type heating system, and the cooling system of said steam power plant is a cooling tower or a device for cooling.
This steam power plant reclaim main and auxiliary machine condensation waste heat combined type heating system also be applicable between cold power plant.
The beneficial effect of the utility model is:
Absorption heat pump in steam power plant has increased when subcooler and water water-to-water heat exchanger 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.In the condensation temperature of heating season raising subsidiary engine, make heat supply network can directly draw waste heats with the hot net water direct heat transfer more, but do not influence main engine power generation.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 exhaust steam in steam turbine 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 absorber, condenser and the evaporimeter of each heat pump, 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 technology economic indicator of steam power plant is further enhanced.
Description of drawings
Fig. 1 (a) divides flow diagram for the heat supply network backwater that the utility model relates to before the water water-to-water heat exchanger.
Fig. 1 (b) divides flow diagram for the heat supply network backwater that the utility model relates to behind the water water-to-water heat exchanger.
Reference numeral among the figure:
Sucking condensing turbine 1, generator 2, main steam turbine extraction steam pipe 3, coagulate water pipe 4, first water-cooled condenser 5 (former), auxiliary steam turbine 6, second water-cooled condenser 7 (former), water water-to-water heat exchanger 8 (increase), subcooler 9, vapor-water heat exchanger 10, heat supply network return branch 11, heat supply network return branch 12, discharge water pipe 13, discharge water pipe 14, cooling tower 15 and absorption heat pump XR1 ... N.
Heat supply network backwater A1, heat supply network water supply A2, high steam B, exhaust steam in steam turbine C, coagulate water and go out D, jockey pulley machine exhaust steam E.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Embodiment 1:
Shown in Fig. 1 (a), Fig. 1 (a) divides flow diagram for the heat supply network backwater that the utility model relates to before the water water-to-water heat exchanger.Can find out by Fig. 1 (a), the utility model steam power plant reclaim main and auxiliary machine condensation waste heat combined type heating system by sucking condensing turbine 1, generator 2, main steam turbine extraction steam pipe 3, coagulate water pipe 4, first water-cooled condenser 5, auxiliary steam turbine 6, second water-cooled condenser 7, water water-to-water heat exchanger 8, subcooler 9, vapor-water heat exchanger 10, heat supply network return branch 11, heat supply network return branch 12, discharge water pipe 13, discharge water pipe 14, cooling tower 15 and 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.The auxiliary steam turbine exhaust steam inserts second water-cooled condenser 7.The heat supply network backwater is divided into two the tunnel after getting into power plant: heat supply network return branch 11 and heat supply network return branch 12.One road heat supply network return branch 11 inserts water water-to-water heat exchangers 8, and water outlet water-to-water heat exchanger 8 backs get into the absorbers of 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 XR2 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 water water-to-water heat exchanger 8; 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 12 directly parallel connection gets into each absorption heat pump XR1 ... The subcooler 9 of n.Heat exchange heats up in subcooler 9, 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.Cool cycles water discharge pipe in first water-cooled condenser 5 of steam power plant is divided into two the tunnel: the one tunnel and discharges the evaporimeter that water pipe 13 is introduced into n platform absorption heat pump XRn; Return successively then; Get into the evaporimeter of second absorption heat pump XR2, first absorption heat pump XR1, heat again from returning first water-cooled condenser 5 after first absorption heat pump XR1 flows out at last.Another road is discharged water pipe 14 and is entered atmosphere to unnecessary heat through cooling tower 15.The cooling circulating water of second water-cooled condenser 7 goes out the cooling system that the 7 back parallel connections of described second water-cooled condenser insert water water-to-water heat exchanger 8 and steam power plant.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.
Embodiment 2:
Shown in Fig. 1 (b), Fig. 1 (b) divides flow diagram for the heat supply network backwater that the utility model relates to behind the water water-to-water heat exchanger.Fig. 1 (b) is behind water water-to-water heat exchanger 8, 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 (5)

1. a steam power plant reclaims main and auxiliary machine condensation waste heat combined type heating system; Comprise sucking condensing turbine (1), main steam turbine extraction steam pipe (3), first water-cooled condenser (5), auxiliary steam turbine (6), second water-cooled condenser (7), 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 (9), system's increase has a water water-to-water heat exchanger (8); The auxiliary steam turbine exhaust steam inserts second water-cooled condenser (7); 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 water water-to-water heat exchanger (8), 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); Go out the condenser that gets into this n platform absorption heat pump (XRn) behind the absorber of n platform absorption heat pump (XRn) again, then from n-1, n-2 ... Be connected in series successively, from the condenser of first absorption heat pump (XR1), go out at last; Another road heat supply network backwater parallel connection gets into each absorption heat pump (XR1 ... N) subcooler (9); 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 first water-cooled condenser (5) is divided into two tunnel: one road evaporimeter connection of access n platform absorption heat pump (XRn) earlier after going out said first water-cooled condenser (5), returns successively then, gets into the evaporimeter of second, first absorption heat pump; From the evaporimeter of first absorption heat pump (XR1), go out at last, return first water-cooled condenser (5); The cooling system of steam power plant is inserted on another road; The cooling circulating water of second water-cooled condenser (7) goes out the cooling system that the parallel connection of described second water-cooled condenser (7) back inserts water water-to-water heat exchanger (8) and steam power plant.
2. a kind of steam power plant according to claim 1 reclaims main and auxiliary machine condensation waste heat combined type heating system; It is characterized in that: the heat supply network backwater is divided into two tunnel: one road heat supply network backwater entering water water-to-water heat exchanger (8) earlier after getting into steam power plant; Get into the absorber of first absorption heat pump (XR1) behind the water outlet water-to-water heat exchanger (8) again, another road heat supply network backwater does not get into water water-to-water heat exchanger (8) and directly parallelly connected each absorption heat pump (XR1 that gets into ... N) subcooler (9).
3. a kind of steam power plant according to claim 1 reclaims main and auxiliary machine condensation waste heat combined type heating system; It is characterized in that: said heat supply network backwater gets into advanced entry water-to-water heat exchanger (8) after the steam power plant; Be further divided into the absorber of two tunnel: one tunnel first absorption heat pump of entering (XR1) behind the water outlet water-to-water heat exchanger (8), another road parallel connection gets into each absorption heat pump (XR1 ... N) subcooler (9).
4. reclaim main and auxiliary machine condensation waste heat combined type heating system 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 (9) 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.
5. reclaim main and auxiliary machine condensation waste heat combined type heating system according to claim 1 or 2 or 3 described a kind of steam power plants, it is characterized in that: the cooling system of said steam power plant is a cooling tower (15) or a device for cooling.
CN2011202687000U 2011-07-27 2011-07-27 Combined heat supply system for recycling condenser heat of main engine and auxiliary engine of thermal power plant Withdrawn - After Issue CN202182506U (en)

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CN2011202687000U CN202182506U (en) 2011-07-27 2011-07-27 Combined heat supply system for recycling condenser heat of main engine and auxiliary engine of thermal power plant

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Application Number Priority Date Filing Date Title
CN2011202687000U CN202182506U (en) 2011-07-27 2011-07-27 Combined heat supply system for recycling condenser heat of main engine and auxiliary engine 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
CN102330579A (en) * 2011-07-27 2012-01-25 双良节能系统股份有限公司 Combined type heating system for recovering condensation waste heat of main stream turbine and auxiliary stream turbine of thermal power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102330579A (en) * 2011-07-27 2012-01-25 双良节能系统股份有限公司 Combined type heating system for recovering condensation waste heat of main stream turbine and auxiliary stream turbine of thermal power plant
CN102330579B (en) * 2011-07-27 2014-02-26 双良节能系统股份有限公司 Combined type heating system for recovering condensation waste heat of main stream turbine and auxiliary stream turbine of thermal power plant

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Granted publication date: 20120404

Effective date of abandoning: 20140226