CN102331029A - Water-water type heating system for recovering waste heat in absorption heat pumps in heat power plant - Google Patents
Water-water type heating system for recovering waste heat in absorption heat pumps in heat power plant Download PDFInfo
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- CN102331029A CN102331029A CN201110211962A CN201110211962A CN102331029A CN 102331029 A CN102331029 A CN 102331029A CN 201110211962 A CN201110211962 A CN 201110211962A CN 201110211962 A CN201110211962 A CN 201110211962A CN 102331029 A CN102331029 A CN 102331029A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
Abstract
The invention relates to a water-water type heating system for recovering waste heat in absorption heat pumps in a heat power plant. The system comprises an extraction condensing turbine (1), a turbine steam extraction pipe (3), a water-cooled condenser (5), a water-water heat exchanger (6), subcoolers (7), a steam-water heat exchanger (9) and n-numbered absorption heat pumps. The system is characterized in that heating network backwater enters the subcoolers (7) of the absorption heat pumps (XR1...n) in parallel after entering the heat power plant, then firstly enters an absorber of the first absorption heat pump (XR1) and then is connected with the absorption heat pumps (XR1...n) in series after flowing through the water-water heat exchanger (6), enters a condenser of the nth absorption heat pump (XRn) after flowing out of an absorber of the nth absorption heat pump (XRn), then is connected into the condensers of the absorption heat pumps (XRn...1) in series, and is directly discharged or is discharged after being reheated. The system provided by the invention can recover much waste heat of condensation in the heat power plant, improve the operating efficiency of the heat pumps, and ensure the heating network system to operate more reliably.
Description
Technical field
The present invention relates to a kind of cogeneration heating system, be applicable to that the exhaust steam of cogeneration power plant steam turbine is more energy-conservation, utilize safely and reliably, 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 objective of the invention is to overcome above-mentioned deficiency, a kind of condensation waste heat of realizing reclaiming more steam power plants is provided, the operational efficiency of raising heat pump and the heat network system more steam power plant of reliability service reclaim absorption heat pump remaining hot water ability of swimming heating system.
The objective of the invention is to realize like this: a kind of steam power plant reclaims absorption heat pump remaining hot water ability of swimming heating system; Comprise sucking condensing turbine, extracted steam from turbine pipe, 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.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.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 former water-cooled condenser cooperation.The heat supply network backwater gets into the parallelly connected subcooler that gets into each absorption heat pump after the steam power plant; Gather after the outflow and get into the water water-to-water heat exchanger; Be introduced into the absorber of first absorption heat pump after heating up once more, 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, directly or again behind vapor-water heat exchanger, see off.The cool cycles water out of said water-cooled condenser is divided into three the road or two the tunnel, get into respectively absorption heat pump evaporimeter, water water-to-water heat exchanger and steam power plant cooling system or get into the former two respectively.The cooling system of steam power plant can be that air and this water-cooled condenser go out water direct heat-exchange, also can be that air and water-cooled condenser water outlet indirect exchange enter atmosphere with heat.
A kind of steam power plant of the present invention reclaims absorption heat pump remaining hot 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 the heat supply network backwater goes out the laggard entry water-to-water heat exchanger of subcooler after this merging.
A kind of steam power plant of the present invention reclaims absorption heat pump remaining hot water ability of swimming heating system; The cooling circulating water of said water-cooled condenser be divided into three the tunnel: the one tunnel be introduced into n platform absorption heat pump evaporimeter; 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 water-cooled condenser; Another road gets into the circulation of water water-to-water heat exchanger; Third Road gets into the cooling system of steam power plant.
A kind of steam power plant of the present invention reclaims absorption heat pump remaining hot water ability of swimming heating system; The cool cycles water out of said water-cooled condenser is divided into two the tunnel; One the tunnel is introduced into the evaporimeter of n platform absorption heat pump, returns successively then, gets into the evaporimeter of second, first absorption heat pump; From the evaporimeter of first absorption heat pump, go out at last, and then get into the cooling system of steam power plant; Another road gets into the circulation of water water-to-water heat exchanger.
A kind of steam power plant of the present invention reclaims absorption heat pump remaining hot water ability of swimming heating system, and the cooling system of said steam power plant is a cooling tower or a device for cooling.
A kind of steam power plant of the present invention reclaims absorption heat pump remaining hot water ability of swimming heating system, and described absorption heat pump is a separate unit multisection type absorption heat pump.
Cold power plant between this steam power plant recovery absorption heat pump remaining hot water ability of swimming heating system also is applicable to.
The invention has the beneficial effects as follows:
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.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 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) directly advances heat pump subcooler and cooling circulating water three circulation sketch mapes for the heat supply network backwater that the present invention relates to.
Fig. 1 (b) directly advances heat pump subcooler and cooling circulating water bigeminy circulation sketch map for the heat supply network backwater that the present invention relates to.
Reference numeral among the figure:
Sucking condensing turbine 1, generator 2, extracted steam from turbine pipe 3, coagulate water pipe 4, water-cooled condenser 5 (former), water water-to-water heat exchanger 6 (increasing newly), subcooler 7, cool cycles water discharge pipe 8, vapor-water heat exchanger 9, heat supply network return branch 10, cooling tower 11, a device for cooling 12, 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.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further:
Embodiment 1:
Shown in Fig. 1 (a), Fig. 1 (a) directly advances heat pump subcooler and cooling circulating water three circulation sketch mapes for the heat supply network backwater that the present invention relates to.Can find out by Fig. 1 (a), steam power plant reclaim absorption heat pump remaining hot water ability of swimming heating system by sucking condensing turbine 1, generator 2, extracted steam from turbine pipe 3, coagulate water pipe 4, water-cooled condenser 5, water water-to-water heat exchanger 6, subcooler 7, cool cycles water discharge pipe 8, vapor-water heat exchanger 9, heat supply network return branch 10, cooling tower 11, a device for cooling 12, 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.Parallel connection got into each absorption heat pump XR1 after heat supply network return branch 10 got into power plant ... The subcooler 7 of n; Gather after the intensification and get into water water-to-water heat exchanger 6, the back of heating up once more gets into the absorber 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 subcooler 7, water water-to-water heat exchanger 6; 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; The heat supply network return water temperature is raise, directly or again after vapor-water heat exchanger 9 heats up, see off.The heat exchange in subcooler 7 of this one road heat supply network backwater heats up, and 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.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 pipes 8 in the water-cooled condenser 5 of steam power plant be divided into three 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, heat again from returning water-cooled condenser 5 after the evaporimeter of first absorption heat pump XR1 flows out at last.Another road gets into water water-to-water heat exchanger 6, returns water-cooled condenser 5 behind the heating heat supply network backwater and heats.Third Road enters atmosphere to unnecessary heat through a cooling tower 11 or a device for cooling 12.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) directly advances heat pump subcooler and cooling circulating water bigeminy circulation sketch map for the heat supply network backwater that the present invention relates to.Fig. 1 (b) is the circulation of cooling circulating water bigeminy 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 (6)
1. a steam power plant reclaims absorption heat pump remaining hot water ability of swimming heating system; Comprise sucking condensing turbine (1), extracted steam from turbine pipe (3), water-cooled condenser (5), vapor-water heat exchanger (9) 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 (7), the increase of said system has a water water-to-water heat exchanger (6); The parallel connection after getting into steam power plant of heat supply network backwater gets into each absorption heat pump (XR1 ... N) subcooler (7); Gathering after the outflow connects gets into the absorber of water water-to-water heat exchanger (6) and first absorption heat pump (XR1), gets 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, directly or again behind vapor-water heat exchanger (9), see off; The cooling circulating water of said water-cooled condenser (5) is divided into three the road or two the tunnel after going out said water-cooled condenser (5), get into respectively absorption heat pump (XRn) evaporimeter, water water-to-water heat exchanger (6) and steam power plant cooling system or get into the former two respectively.
2. a kind of steam power plant according to claim 1 reclaims absorption heat pump remaining hot water ability of swimming heating system; It is characterized in that: said each absorption heat pump (XR1 ... N) subcooler (7) is merged into a subcooler; Each absorption heat pump (XR1 ... N) water as refrigerant pipeline parallel connection inserts the subcooler after this merging, and the heat supply network backwater goes out the laggard entry water-to-water heat exchanger of subcooler (6) after this merging.
3. a kind of steam power plant according to claim 1 and 2 reclaims absorption heat pump remaining hot water ability of swimming heating system; It is characterized in that: the cooling circulating water of said water-cooled condenser (5) be divided into three the tunnel: the one tunnel be introduced into n platform absorption heat pump (XRn) evaporimeter; Return successively then; Get into the evaporimeter of second, first absorption heat pump, from the evaporimeter of first absorption heat pump (XR1), go out at last, return water-cooled condenser (5); Another road gets into water water-to-water heat exchanger (6) circulation; Third Road gets into the cooling system of steam power plant.
4. a kind of steam power plant according to claim 3 reclaims absorption heat pump remaining hot water ability of swimming heating system; It is characterized in that: the cool cycles water out of said water-cooled condenser (5) is divided into two the tunnel; One the tunnel is introduced into the evaporimeter of 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, and then get into the cooling system of steam power plant; Another road gets into water water-to-water heat exchanger (6) circulation.
5. a kind of steam power plant according to claim 1 reclaims absorption heat pump remaining hot water ability of swimming heating system, and it is characterized in that: the cooling system of said steam power plant is a cooling tower (11) or a device for cooling (12).
6. a kind of steam power plant according to claim 1 reclaims absorption heat pump remaining hot water ability of swimming heating system, and it is characterized in that: described absorption heat pump is a separate unit multisection type absorption heat pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110211962 CN102331029B (en) | 2011-07-27 | 2011-07-27 | Water-water type heating system for recovering waste heat in absorption heat pumps in heat power plant |
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| CN 201110211962 CN102331029B (en) | 2011-07-27 | 2011-07-27 | Water-water type heating system for recovering waste heat in absorption heat pumps in heat power plant |
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| CN102331029A true CN102331029A (en) | 2012-01-25 |
| CN102331029B CN102331029B (en) | 2013-03-27 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007064047A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat recovery facility for steam turbine plant |
| CN1959220A (en) * | 2006-09-06 | 2007-05-09 | 清华大学 | Heating system of water source heat pump by using remaining heat of condensed steam from power plant |
| US20070102276A1 (en) * | 2005-11-09 | 2007-05-10 | Honeywell International, Inc. | Apparatus and methods for water regeneration from waste |
| WO2009105930A1 (en) * | 2008-02-28 | 2009-09-03 | 清华大学 | A kind of concentrated heat-supply system |
| CN101619662A (en) * | 2009-08-14 | 2010-01-06 | 清华大学 | Method for recovering waste heat of thermal power plant and heating and supplying heat to hot water in a stepping way |
| KR100975276B1 (en) * | 2009-12-01 | 2010-08-12 | 주식회사 코와 | Local heating water feeding system using absorbing type heat pump |
| CN202228142U (en) * | 2011-07-27 | 2012-05-23 | 双良节能系统股份有限公司 | Water-water heating system capable of recycling waste heat of absorption heat pump in thermal power plant |
-
2011
- 2011-07-27 CN CN 201110211962 patent/CN102331029B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007064047A (en) * | 2005-08-30 | 2007-03-15 | Hitachi Eng Co Ltd | Waste heat recovery facility for steam turbine plant |
| US20070102276A1 (en) * | 2005-11-09 | 2007-05-10 | Honeywell International, Inc. | Apparatus and methods for water regeneration from waste |
| CN1959220A (en) * | 2006-09-06 | 2007-05-09 | 清华大学 | Heating system of water source heat pump by using remaining heat of condensed steam from power plant |
| WO2009105930A1 (en) * | 2008-02-28 | 2009-09-03 | 清华大学 | A kind of concentrated heat-supply system |
| CN101619662A (en) * | 2009-08-14 | 2010-01-06 | 清华大学 | Method for recovering waste heat of thermal power plant and heating and supplying heat to hot water in a stepping way |
| KR100975276B1 (en) * | 2009-12-01 | 2010-08-12 | 주식회사 코와 | Local heating water feeding system using absorbing type heat pump |
| CN202228142U (en) * | 2011-07-27 | 2012-05-23 | 双良节能系统股份有限公司 | Water-water heating system capable of recycling waste heat of absorption heat pump in thermal power plant |
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| CN102331029B (en) | 2013-03-27 |
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Inventor after: Li Baoshan Inventor after: Zhang Liangliang Inventor after: Jia Jia Inventor before: Jiang Rongfang Inventor before: Mao Hongcai Inventor before: Cai Xiaorong |
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Effective date of registration: 20180211 Address after: 030006 Shanxi province Taiyuan economic and Technological Development Zone, Taiyuan City regenerative energy heating Co., Ltd. Patentee after: Taiyuan renewable energy supply Co., Ltd. Address before: 214444 Jiangsu city of Wuxi province Jiangyin City Li Town Road No. 1 West Patentee before: Shuangliang Energy Saving System Co., Ltd. |