CN202188549U - Heat-net return water serial-connection water type heat supply system used for recovering condensation waste heat of main and auxiliary machine in thermal power plant - Google Patents

Heat-net return water serial-connection water type heat supply system used for recovering condensation waste heat of main and auxiliary machine in thermal power plant Download PDF

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Publication number
CN202188549U
CN202188549U CN 201120268685 CN201120268685U CN202188549U CN 202188549 U CN202188549 U CN 202188549U CN 201120268685 CN201120268685 CN 201120268685 CN 201120268685 U CN201120268685 U CN 201120268685U CN 202188549 U CN202188549 U CN 202188549U
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China
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water
heat
heat pump
power plant
absorption
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CN 201120268685
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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
    • 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 heat-net return water serial-connection water type heat supply system used for recovering the condensation waste heat of main and auxiliary machines in a thermal power plant, which comprises an extraction condensation type steam turbine (1), a main steam turbine steam extraction pipe (3), a first water cooling condenser (4), a first water-water heat exchanger (5), a second water cooling condenser (7), a second water-water heat exchanger (8), subcoolers (9), a steam-water heat exchanger (10) and absorption heat pumps. Heat-net return water flowing into a thermal power plant is divided into two parts, wherein one part sequentially flows through the first and second water-water heat exchangers and enters the absorber of the first absorption heat pump (XR1) so as to be serially connected with all the absorption heat pumps (XR1...n). hen the part of heat-net return water flows out of the absorber of the n absorption heat pump (XRn) and enters the condenser of the n absorption heat pump (XRn) so as to be serially connected with the condensers of the all the absorption heat pumps. The other part of heat-net return water enters the subcoolers (9) of all the absorption heat pumps in a parallel connection manner. The two parts of heat-net return water are finally merged with each other. Due to the adoption of the heat-net return water serial-connection water type heat supply system, more condensation waste heat in a thermal power plant can be recovered and the operation efficiency of heat pumps is improved. Therefore, the operation of a heat net system is more reliable.

Description

Steam power plant reclaims main auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming 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; 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 auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system.
The purpose of the utility model is achieved in that a kind of steam power plant reclaims main auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system; Comprise sucking condensing turbine, main steam turbine extraction steam pipe, first water-cooled condenser, auxiliary steam turbine, second water-cooled condenser, vapor-water heat exchanger 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.Main and auxiliary exhaust steam in steam turbine condenses into water by condenser, and condensation waste heat is recycled.The condensation temperature of subsidiary engine improves in steam power plant during heating.It is characterized in that: said absorption heat pump has additional subcooler; System's increase has one first water water-to-water heat exchanger and one second water water-to-water heat exchanger; The heat supply network backwater gets into and to be divided into two tunnel: one road heat supply network backwater after the steam power plant and to get into the absorber that gets into first absorption heat pump behind the first water water-to-water heat exchanger and the second water water-to-water heat exchanger more successively; 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, go out at last; Another road heat supply network backwater does not get into the first water water-to-water heat exchanger and the directly parallelly connected subcooler that gets into 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 of first water-cooled condenser go out divide behind said first water-cooled condenser three the tunnel: the one road insert absorption heat pump evaporimeter; The first water water-to-water heat exchanger is inserted on another road; Third Road inserts the cooling system of steam power plant; The cooling circulating water of second water-cooled condenser goes out the cooling system that parallel connection behind described second water-cooled condenser inserts the second 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 auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming 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 auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system, and the cooling system of said steam power plant is a cooling tower or a device for cooling.
Cold power plant between this steam power plant recovery main auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system also is applicable to.
The beneficial effect of the utility model is:
Absorption heat pump in steam power plant has increased when subcooler and two water water-to-water heat exchangers supply heat supply in winter to do heat supply season and has moved.The condensation temperature of subsidiary engine improves in steam power plant during heating.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.The heat supply network backwater utilizes the main frame waste heat to utilize the subsidiary engine waste heat can how directly to reclaim used heat more earlier.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
The heat supply network backwater that Fig. 1 relates to for the utility model is at two water water-to-water heat exchangers series connection sketch mapes.
Reference numeral among the figure:
Sucking condensing turbine 1, generator 2, main steam turbine extraction steam pipe 3, first water-cooled condenser 4 (former), the first water water-to-water heat exchanger 5 (increasing newly), auxiliary steam turbine 6, second water-cooled condenser 7 (former), the second water water-to-water heat exchanger 8 (increasing newly), 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:
As shown in Figure 1, the heat supply network backwater that Fig. 1 relates to for the utility model is at two water water-to-water heat exchangers series connection sketch mapes.Can find out by Fig. 1; The utility model steam power plant reclaims main auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system, by sucking condensing turbine 1, generator 2, main steam turbine extraction steam pipe 3, first water-cooled condenser 4, the first water water-to-water heat exchanger 5, auxiliary steam turbine 6, second water-cooled condenser 7, the second 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 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 gets into the first water water-to-water heat exchanger 5 and the second water water-to-water heat exchanger 8 successively, goes out the absorber that the second water water-to-water heat exchanger 8 back gets 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 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 the first water water-to-water heat exchanger 5 and the second 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 out in first water-cooled condenser 4 of steam power plant is divided into three 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 4 after first absorption heat pump XR1 flows out at last.The first water water-to-water heat exchanger 5 is removed on another road, returns first water-cooled condenser 4 behind the heating heat supply network backwater and heats.Third Road is discharged water pipe 14 and is entered atmosphere to unnecessary heat through cooling tower 15.Circulating water outlet in second water-cooled condenser 7 divides remove second water water-to-water heat exchanger 8 at two the tunnel: the one tunnel, returns the second water water-to-water heat exchanger 8 behind the heating heat supply network backwater and heats.Cooling tower 15 is removed on another road.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.
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 (3)

1. a steam power plant reclaims main auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system; Comprise sucking condensing turbine (1), main steam turbine extraction steam pipe (3), first water-cooled condenser (4), 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 one first water water-to-water heat exchanger (5) and one second water water-to-water heat exchanger (8); The heat supply network backwater gets into and to be divided into two tunnel: one road heat supply network backwater after the steam power plant and to get into the absorber that gets into first absorption heat pump (XR1) behind the first water water-to-water heat exchanger (5) and the second water water-to-water heat exchanger (8) more successively; Get into the absorber of second absorption heat pump (XR2) again ... Be connected in series successively,, 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 until the absorber that gets into n platform absorption heat pump (XRn); 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 does not get into the first water water-to-water heat exchanger (5) and directly parallelly connected each absorption heat pump (XR1 that gets into ... 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 (4) goes out the evaporimeter that said first water-cooled condenser (4) back branch three tunnel: a tunnel is introduced into n platform absorption heat pump (XRn), 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 (4); First water-cooled condenser (4) is returned after getting into the first water water-to-water heat exchanger (5) in another road; Third Road gets into the cooling system of steam power plant; 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 the second water water-to-water heat exchanger (8) and steam power plant.
2. a kind of steam power plant according to claim 1 reclaims main auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system; 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.
3. a kind of steam power plant according to claim 1 and 2 reclaims main auxiliary machine condensation waste heat heat supply network backwater series connection water ability of swimming heating system, and it is characterized in that: the cooling system of said steam power plant is a cooling tower (15) or a device for cooling.
CN 201120268685 2011-07-27 2011-07-27 Heat-net return water serial-connection water type heat supply system used for recovering condensation waste heat of main and auxiliary machine in thermal power plant Withdrawn - After Issue CN202188549U (en)

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CN 201120268685 CN202188549U (en) 2011-07-27 2011-07-27 Heat-net return water serial-connection water type heat supply system used for recovering condensation waste heat of main and auxiliary machine in thermal power plant

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Application Number Priority Date Filing Date Title
CN 201120268685 CN202188549U (en) 2011-07-27 2011-07-27 Heat-net return water serial-connection water type heat supply system used for recovering condensation waste heat of main and auxiliary machine in 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
CN102331027A (en) * 2011-07-27 2012-01-25 双良节能系统股份有限公司 Backwater and series water type heat supply system for heat supply network for recycling condensing waste heat of main steam turbine and auxiliary steam turbine of thermal power plant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102331027A (en) * 2011-07-27 2012-01-25 双良节能系统股份有限公司 Backwater and series water type heat supply system for heat supply network for recycling condensing waste heat of main steam turbine and auxiliary steam turbine of thermal power plant
CN102331027B (en) * 2011-07-27 2013-05-01 双良节能系统股份有限公司 Backwater and series water type heat supply system for heat supply network for recycling condensing waste heat of main steam turbine and auxiliary steam turbine of thermal power plant

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AV01 Patent right actively abandoned

Granted publication date: 20120411

Effective date of abandoning: 20130501

RGAV Abandon patent right to avoid regrant