CN202221119U - Composite heat supply system of condensation waste heat of recycling auxiliary machine of thermal power plant - Google Patents

Composite heat supply system of condensation waste heat of recycling auxiliary machine of thermal power plant Download PDF

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Publication number
CN202221119U
CN202221119U CN 201120250840 CN201120250840U CN202221119U CN 202221119 U CN202221119 U CN 202221119U CN 201120250840 CN201120250840 CN 201120250840 CN 201120250840 U CN201120250840 U CN 201120250840U CN 202221119 U CN202221119 U CN 202221119U
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China
Prior art keywords
water
heat pump
supply network
absorption heat
heat
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Withdrawn - After Issue
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CN 201120250840
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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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Priority to CN 201120250840 priority Critical patent/CN202221119U/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 composite heat supply system of condensation waste heat of a recycling auxiliary machine of a thermal power plant, which comprises an auxiliary turbine (1), a first water-cooling condenser, a gas-water heat exchanger (10) and absorption type heat pumps (XR1...n). The absorption type heat pumps (XR1...n) are additionally provided with subcoolers (4). A second water-cooling condenser (3) and a water-water heat exchanger (14) are added on the system. Thermal network return water is divided into two paths before or after entering the second water-cooling condenser (3). One path of thermal network return water firstly enters an absorber of the first absorption type heat pump (XR1), ... sequentially connected in series, until enters an absorber of the nth absorption type heat pump (XRn), then enters a condenser of the nth absorption type heat pump (XRn), then...sequentially connected in series, and finally flows out of a condenser of the first absorption type heat pump (XR1). The other path of thermal network return water is connected in parallel with and enters the subcoolers (4) of the absorption type heat pumps. The composite heat supply system of the condensation waste heat of the recycling auxiliary machine of the thermal power plant can recycle more condensation waste heat of the thermal power plant, improves operation efficiency of the heat pumps and enables the thermal network system to be more stable in operation.

Description

Steam power plant reclaims the combined type heating system 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, and 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 heating system of 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 combined type heating system of subsidiary engine condensation waste heat; Comprise auxiliary steam turbine, first water-cooled condenser, vapor-water heat exchanger, main steam turbine extraction steam pipe and absorption heat pump; Said absorption heat pump has the n platform; N is >=2 natural number, and 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.The auxiliary steam turbine exhaust steam condenses into water by condenser, and condensation waste heat is recycled.Said absorption heat pump has additional subcooler; System's increase has one second water-cooled condenser and a water water-to-water heat exchanger; 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; 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 parallel connection gets into the subcooler of each absorption heat pump; Two road heat supply network backwater merge at last; Directly or again behind vapor-water heat exchanger, see off; The cooling circulating water discharge of first water-cooled condenser is divided into two tunnel, one road outlet pipe entering water water-to-water heat exchanger, one rear flank and returns first condenser, and the evaporimeter recirculated water of water water-to-water heat exchanger opposite side is introduced into the evaporimeter of n platform absorption heat pump XRn; Return successively then, after the evaporimeter outflow of first absorption heat pump, return the water water-to-water heat exchanger at last; Another road outlet pipe inserts the cooling device of steam power plant.
The utility model steam power plant reclaims the combined type heating system of subsidiary engine condensation waste heat; Described heat supply network backwater gets into and is divided into two tunnel: one road heat supply network backwater earlier after the steam power plant and gets into second water-cooled condenser; Go out the absorber that gets into first absorption heat pump behind second water-cooled condenser again, another road heat supply network backwater do not get into second water-cooled condenser and directly parallel connection get into the subcooler of each absorption heat pump.
The utility model steam power plant reclaims the combined type heating system of subsidiary engine condensation waste heat; Described heat supply network backwater is introduced into second water-cooled condenser after getting into power plant; Go out to be further divided into behind second water-cooled condenser each absorption heat pump of serial connection behind the absorber that two tunnel: one road heat supply network backwater is introduced into first absorption heat pump, 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 combined type heating system 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 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 and heat pump remaining hot 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 technology economic indicator of steam power plant is 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, water water-to-water heat exchanger (increasing newly) 14, evaporimeter circulating water pipe The road15, 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 (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, water water-to-water heat exchanger (increasing newly) 14, evaporimeter circulating water line 15, 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 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 return branch 8 gets into second water-cooled condenser 3, goes out the absorber that second water-cooled condenser, 3 backs 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 gets into water water-to-water heat exchanger 14 1 and is sidelong heat back time first water-cooled condenser 2; And the evaporimeter circulating water line 15 of water water-to-water heat exchanger 14 opposite sides 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, heat again from returning water water-to-water heat exchanger 14 after first absorption heat pump XR1 flows out at last; Another road outlet pipe 6 enters atmosphere to unnecessary heat through cooling device 7.In this system heat supply network recirculated water and evaporimeter recirculated 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 combined type heating system of subsidiary engine condensation waste heat; Comprise auxiliary steam turbine (1), first water-cooled condenser (2), vapor-water heat exchanger (10), main steam turbine extraction steam pipe (11) 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 a water water-to-water heat exchanger (14), and the heat supply network backwater is divided into two the tunnel before or after entering second water-cooled condenser (3); One road heat supply network backwater is introduced into the absorber of first absorption heat pump (XR1); The absorber that gets into second absorption heat pump (XR2) again is connected in series successively, until the absorber that gets into n platform absorption heat pump (XRn), goes out the condenser that gets into this n platform absorption heat pump (XRn) behind the absorber of n platform absorption heat pump (XRn) again; Be connected in series successively from n-1, n-2 then, from the condenser of first absorption heat pump (XR1), flow 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 discharge of first water-cooled condenser (2) is divided into two tunnel, one tunnel entering water water-to-water heat exchanger (14) one rear flank and returns first condenser (2), and the evaporimeter recirculated water of water water-to-water heat exchanger (14) opposite side is introduced into the evaporimeter of n platform absorption heat pump (XRn); Return successively then, after the evaporimeter outflow of first absorption heat pump (XR1), return water water-to-water heat exchanger (14) at last; The cooling device (7) of steam power plant is inserted on another road.
2. a kind of steam power plant according to claim 1 reclaims the combined type heating system of subsidiary engine condensation waste heat; It is characterized in that: described heat supply network backwater gets into and is divided into two tunnel: one road heat supply network backwater earlier after the steam power plant and gets into second water-cooled condenser (3); Go out the absorber that gets into first absorption heat pump XR1 behind second water-cooled condenser (3) again, another road heat supply network backwater do not get into second water-cooled condenser (3) and directly parallel connection get into each absorption heat pump (XR1 ... N) subcooler (4).
3. a kind of steam power plant according to claim 1 reclaims the combined type heating system of subsidiary engine condensation waste heat; It is characterized in that: described heat supply network backwater is introduced into second water-cooled condenser (3) after getting into power plant; Go out to be further divided into behind second water-cooled condenser (3) serial connection each absorption heat pump (XRn) behind the absorber that two tunnel: one road heat supply network backwater is introduced into first absorption heat pump (XR1), another road heat supply network backwater parallel connection gets into each absorption heat pump (XR1 ... N) subcooler (4).
4. reclaim the combined type heating system 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 201120250840 2011-07-16 2011-07-16 Composite heat supply system of condensation waste heat of recycling auxiliary machine of thermal power plant Withdrawn - After Issue CN202221119U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120250840 CN202221119U (en) 2011-07-16 2011-07-16 Composite heat supply system of condensation waste heat of recycling auxiliary machine of thermal power plant

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Application Number Priority Date Filing Date Title
CN 201120250840 CN202221119U (en) 2011-07-16 2011-07-16 Composite heat supply system of condensation waste heat of recycling 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
CN102338409A (en) * 2011-07-16 2012-02-01 双良节能系统股份有限公司 Composite heat supply system capable of recovering condensate waste heat of auxiliary machines of thermal power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102338409A (en) * 2011-07-16 2012-02-01 双良节能系统股份有限公司 Composite heat supply system capable of recovering condensate waste heat of auxiliary machines of thermal power plant
CN102338409B (en) * 2011-07-16 2013-08-28 双良节能系统股份有限公司 Composite heat supply system capable of recovering condensate waste heat of auxiliary machines of thermal power plant

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AV01 Patent right actively abandoned

Granted publication date: 20120516

Effective date of abandoning: 20130828

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