CN102331028B - Afterheat steam-water type heat supply system for recycling and absorption type heat pump of thermal power plant - Google Patents
Afterheat steam-water type heat supply system for recycling and absorption type heat pump of thermal power plant Download PDFInfo
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- CN102331028B CN102331028B CN 201110211960 CN201110211960A CN102331028B CN 102331028 B CN102331028 B CN 102331028B CN 201110211960 CN201110211960 CN 201110211960 CN 201110211960 A CN201110211960 A CN 201110211960A CN 102331028 B CN102331028 B CN 102331028B
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- Y02B30/12—Hot water central heating systems using heat pumps
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Abstract
The invention relates to an afterheat steam-water type heat supply system for a recycling and absorption type heat pump of a thermal power plant. The system comprises an extraction condensing steam turbine (1), a steam turbine steam extraction tube (3), a first water-cooling condenser (5), a second water-cooling condenser (6), subcoolers (7), a steam and water exchanger (9) and n absorption type heat pumps (XR1, ..., and XRn), wherein backwater of a heat supply network is connected in parallel with the subcoolers (7) of the absorption type heat pumps (XR1, ..., and XRn) and connected in series with the absorption type heat pumps (XR1, ..., and XRn) after entering an absorber of the first absorption type heat pump (XR1) through the second water-cooling condenser (6), gets out of an absorber of the nth absorption type heat pump (XRn) and enters a condenser of the nth absorption type heat pump (XRn), is connected in series with the condensers of the absorption type heat pumps (XR1, ..., and XRn) and is sent out directly or heated and sent out. By the system, much condensing waste heat of the thermal power plant can be recycled, the running efficiency of the heat pumps is improved, and the running of the heat supply network system is more reliable.
Description
Technical field
The present invention relates to a kind of thermoelectric combined heating system, be applicable to more energy-conservation, the safely and reliably utilization of cogeneration power plant steam turbine exhaust steam, 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.North City planning cogeneration carries out central heating, to substitute original independent boiler central heating, realizes the requirement of energy-saving and emission-reduction.Take full advantage of steam power plant's used heat, to improve the heat capacity of steam power plant, realize better energy-saving and emission-reduction, guarantee again the safe and reliable operation of steam power plant and heat supply network simultaneously, various new flow processs require study.Realize the more turbine discharge used heat that reclaims in the power plant, the most important condition is with the secondary network return water temperature reduction of hot user side, adopts on this basis the source pump take electricity as power, or the absorption type heat pump assembly take the heat supply network high-temperature water as power.Carry out refrigeration cool-down by the heat supply network backwater that power plant is confessed, as the waste heat source of heat pump again for secondary network, the heat supply network return water temperature is reduced after telegram in reply factory.Power plant's heat supply network backwater is introduced into former plant condenser after entering power plant, with electric power plant circulating water be blended in the condenser heat up after, enter again absorption heat pump, send after in heat pump, heating up.In this system, the temperature that recirculated water goes out heat pump be heat supply network in the key of the many recovering condensing heats of whole Heating Season, 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 object 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 waste heat steam-water type heating system.
The object of the present invention is achieved like this: a kind of steam power plant reclaims absorption heat pump waste heat steam-water type heating system, comprise sucking condensing turbine, extracted steam from turbine pipe, the first water-cooled condenser, vapor-water heat exchanger and absorption heat pump, described absorption heat pump has the n platform, and n is 〉=2 natural number.High steam is extracted part steam out as the thermal source of absorption heat pump and vapor-water heat exchanger after sucking condensing turbine work done generating.Exhaust steam in steam turbine condenses into water by condenser, and condensation waste heat is recycled.Be characterized in: described absorption heat pump has additional subcooler, increases by second water-cooled condenser and former the first water-cooled condenser parallel running in steam power plant.The heat supply network backwater enters the subcooler that enters each absorption heat pump in parallel after the steam power plant, after gathering, outflow enters the second water-cooled condenser, be introduced into the absorber of First absorption heat pump after again heating up, enter again the absorber of second absorption heat pump ... be connected in series successively, until enter the absorber of n platform absorption heat pump, go out the condenser that enters again this n platform absorption heat pump behind the absorber of n platform absorption heat pump, 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, send.Cooling circulating water parallel connection or the series connection of described the first water-cooled condenser enter the evaporimeter of absorption heat pump and the cooling system of 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 air and the first water-cooled condenser water outlet indirect exchange enter atmosphere with heat.
Steam power plant of the present invention reclaims absorption heat pump waste heat steam-water type heating system, the cooling circulating water of described the first water-cooled condenser goes out to be divided into two tunnel: one tunnel evaporimeter that is introduced into n platform absorption heat pump behind described the first water-cooled condenser, then return successively ... enter second, the evaporimeter of First absorption heat pump, from the evaporimeter of First absorption heat pump, go out at last, return the first water-cooled condenser; Another road enters the cooling system of steam power plant.
Steam power plant of the present invention reclaims absorption heat pump waste heat steam-water type heating system, the cooling circulating water of described the first water-cooled condenser goes out the evaporimeter that is introduced into n platform absorption heat pump behind described the first water-cooled condenser, then return successively ... enter second, the evaporimeter of First absorption heat pump, from the evaporimeter of First absorption heat pump, go out at last, and then enter the cooling system of steam power plant.
Steam power plant of the present invention reclaims absorption heat pump waste heat steam-water type heating system, the subcooler of described each absorption heat pump is merged into a subcooler, this subcooler after merging of the water as refrigerant pipeline of each absorption heat pump access in parallel, heat supply network backwater enter the second water-cooled condenser after going out subcooler after this merging.
Steam power plant of the present invention reclaims absorption heat pump waste heat steam-water type heating system, and the cooling system of described steam power plant is cooling tower, air cooling device or a device for cooling.
Steam power plant of the present invention reclaims absorption heat pump waste heat steam-water type heating system, and described absorption heat pump is separate unit multisection type absorption heat pump.
This steam power plant reclaims absorption heat pump waste heat steam-water type heating system and also is applicable to air cooling power plant and a cold power plant.
The invention has the beneficial effects as follows:
Absorption heat pump in steam power plant has increased when subcooler and water-cooled condenser are done heat supply for heat supply in winter 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 saved 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, in 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 recovering condensing heat amount when heating demand descends realizes maximization, is used for heating at the more exhaust steam in steam turbine of whole Heating Season utilization.On the other hand, owing to reclaim same condensation heat, the circulating water temperature that goes out heat pump is low, in same outlet temperature situation, and the recyclable more condensation waste heat of heat pump.The corresponding series flow in absorber, condenser and the evaporimeter of each heat pump by heat supply network recirculated water and cooling circulating water is better optimized the performance of heat pump.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, every 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 schematic diagram in parallel for the heat supply network backwater that the present invention relates to.
Fig. 1 (b) directly advances heat pump subcooler and cooling circulating water series connection schematic diagram 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, solidifying water pipe 4, the first water-cooled condenser 5(are former), the second water-cooled condenser 6(is newly-increased), subcooler 7, cool cycles water discharge pipe 8, vapor-water heat exchanger 9, heat supply network return branch 10, cooling tower 11, air cooling device 12, a device for cooling 13, 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, solidifying water go out D.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
Embodiment 1:
Shown in Fig. 1 (a), Fig. 1 (a) directly advances absorption heat pump subcooler and cooling circulating water schematic diagram in parallel for the heat supply network backwater that the present invention relates to.Can be found out that by Fig. 1 (a) steam power plant of the present invention reclaims absorption heat pump waste heat steam-water type heating system by sucking condensing turbine 1, generator 2, extracted steam from turbine pipe 3, solidifying water pipe 4, the first water-cooled condenser 5, the second water-cooled condenser 6, subcooler 7, cool cycles water discharge pipe 8, vapor-water heat exchanger 9, heat supply network return branch 10, cooling tower 11, air cooling device 12, a device for cooling 13, absorption heat pump XR1 ... the compositions such as n and water pump, valve and connecting line.Described absorption heat pump XR1 ... n has the n platform, and n is 〉=2 natural number.Parallel connection entered each absorption heat pump XR1 after heat supply network return branch 10 entered power plant ... the subcooler 7 of n, after gathering, outflow enters the second water-cooled condenser 6, enter the absorber of First absorption heat pump XR1 after again heating up, go out the absorber that enters second absorption heat pump XR2 behind the absorber of First absorption heat pump XR1, all the other the like, go out the absorber that enters again n platform absorption heat pump XRn behind the absorber of n-1 platform absorption heat pump XR2, enter again the condenser of n platform absorption heat pump XRn, then enter the condenser of n-1 platform absorption heat pump XR2, all the other the like,, go out finally by the condenser of First absorption heat pump XR1.Just enter 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, the second water-cooled condenser 6, pass through again 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, send.This one road heat supply network backwater heats up in subcooler 7 interior heat exchange, 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.Owing to enter evaporimeter after the water as refrigerant cooling, elimination water as refrigerant enter behind the evaporimeter liquid state loss of self flash distillation cooling, make water as refrigerant the COP value of heat pump is improved all for the refrigeration to cooling circulating water, reached at one stroke two effects that get.Cool cycles water discharge pipes 8 in the first water-cooled condenser 5 of steam power plant are divided into two tunnel: one tunnel evaporimeter that is introduced into n platform absorption heat pump XRn, then return successively, enter the evaporimeter of second absorption heat pump XR2, First absorption heat pump XR1, heat again from returning the first water-cooled condenser 5 after the evaporimeter of First absorption heat pump XR1 flows out at last.Another road enters atmosphere to unnecessary heat by cooling tower 11, air cooling device 12 or a device for cooling 13.Direct-air-cooling Power Plants the second water-cooled condenser 6 links to each other with the admission pipeline of air cooling device, and the exhaust steam in steam turbine some enters the second water-cooled condenser 6, and some enters air cooling device.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, every 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 series connection schematic diagram for the heat supply network backwater that the present invention relates to.Fig. 1 (b) is the cooling circulating water series circulation with Fig. 1 (a) difference.
Described heat supply network backwater also can carry out heat exchange with the subcooler (not drawing among the figure) that many heat pumps share.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 the heat supply network backwater heats up in subcooler and another road merges.
Claims (6)
1. a steam power plant reclaims absorption heat pump waste heat steam-water type heating system, comprise sucking condensing turbine (1), extracted steam from turbine pipe (3), the first water-cooled condenser (5), vapor-water heat exchanger (9) and absorption heat pump (XR1 ... n), described absorption heat pump (XR1 ... n) the n platform is arranged, n is 〉=2 natural number, it is characterized in that: described absorption heat pump (XR1 ... n) have additional subcooler (7), system's increase has second water-cooled condenser (6), the parallel connection after entering steam power plant of heat supply network backwater enters each absorption heat pump (XR1 ... n) subcooler (7), outflow gathers the absorber that rear series connection enters the second water-cooled condenser (6) and First absorption heat pump (XR1), enter again the absorber of second absorption heat pump (XR2) ... be connected in series successively, until enter the absorber of n platform absorption heat pump (XRn), go out the condenser that enters again this n platform absorption heat pump (XRn) behind the absorber of n platform absorption heat pump (XRn), then from the condenser of n-1 platform absorption heat pump (XR n-1), the condenser of n-2 platform absorption heat pump (XR 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), send; The cooling circulating water of the first water-cooled condenser (5) goes out the rear parallel connection of described the first water-cooled condenser (5) or series connection enters the evaporimeter of n platform absorption heat pump (XRn) and the cooling system of steam power plant.
2. a kind of steam power plant according to claim 1 reclaims absorption heat pump waste heat steam-water type heating system, it is characterized in that: the cooling circulating water of described the first water-cooled condenser (5) goes out to be divided into two tunnel: one tunnel evaporimeter that is introduced into n platform absorption heat pump (XRn) behind described the first water-cooled condenser (5), then return successively ... enter second, the evaporimeter of First absorption heat pump, from the evaporimeter of First absorption heat pump (XR1), go out at last, return the first water-cooled condenser (5); Another road enters the cooling system of steam power plant.
3. a kind of steam power plant according to claim 1 reclaims absorption heat pump waste heat steam-water type heating system, it is characterized in that: the cooling circulating water of described the first water-cooled condenser (5) goes out the evaporimeter that is introduced into n platform absorption heat pump (XRn) behind described the first water-cooled condenser (5), then return successively ... enter second, the evaporimeter of First absorption heat pump, from the evaporimeter of First absorption heat pump (XR1), go out at last, and then enter the cooling system of steam power plant.
According to claim 1 and 2 or 3 described a kind of steam power plants reclaim absorption heat pump waste heat steam-water type heating systems, it is characterized in that: described each absorption heat pump (XR1 ... n) subcooler (7) is merged into a subcooler, each absorption heat pump (XR1 ... n) this subcooler after merging of water as refrigerant pipeline access in parallel, heat supply network backwater enter the second water-cooled condenser (6) after going out subcooler after this merging.
According to claim 1 and 2 or 3 described a kind of steam power plants reclaim absorption heat pump waste heat steam-water type heating systems, it is characterized in that: the cooling system of described steam power plant is cooling tower (11), air cooling device (12) or a device for cooling (13).
According to claim 1 and 2 or 3 described a kind of steam power plants reclaim absorption heat pump waste heat steam-water type heating systems, it is characterized in that: described absorption heat pump is separate unit multisection type absorption heat pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110211960 CN102331028B (en) | 2011-07-27 | 2011-07-27 | Afterheat steam-water type heat supply system for recycling and absorption type heat pump of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110211960 CN102331028B (en) | 2011-07-27 | 2011-07-27 | Afterheat steam-water type heat supply system for recycling and absorption type heat pump of thermal power plant |
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| CN102331028B true CN102331028B (en) | 2013-05-01 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4676284B2 (en) * | 2005-08-30 | 2011-04-27 | 株式会社日立エンジニアリング・アンド・サービス | Waste heat recovery equipment for steam turbine plant |
| JP4578354B2 (en) * | 2005-08-30 | 2010-11-10 | 株式会社日立エンジニアリング・アンド・サービス | Waste heat utilization equipment for steam turbine plant |
| CN100507375C (en) * | 2008-02-28 | 2009-07-01 | 清华大学 | Large temperature-difference central heating system |
| KR100975276B1 (en) * | 2009-12-01 | 2010-08-12 | 주식회사 코와 | Local heating water feeding system using absorbing type heat pump |
| CN201568088U (en) * | 2009-12-21 | 2010-09-01 | 江苏双良空调设备股份有限公司 | Cogeneration system for directly recycling waste heat of exhaust steam from power station steam turbine with absorption type heat pump |
| CN101967999B (en) * | 2010-09-25 | 2013-06-12 | 北京联合优发能源技术有限公司 | Combined heat and power generation energy saving device using afterheat to supply heat and energy saving method |
| CN101943435A (en) * | 2010-09-25 | 2011-01-12 | 北京联合优发能源技术有限公司 | Thermoelectricity co-generation energy-saving device for supplying heat by using waste heat and energy-saving method thereof |
| CN102022770B (en) * | 2010-10-26 | 2012-12-19 | 北京国电电科院节能技术有限公司 | Heat and power cogeneration energy-saving device and method for supplying heat by using direct waste heat of air-cooling unit |
| CN201884080U (en) * | 2010-11-18 | 2011-06-29 | 清华大学 | Steam exhaust waste heat recycling unit |
| CN202182507U (en) * | 2011-07-27 | 2012-04-04 | 双良节能系统股份有限公司 | Thermal power plant recovery absorption heat pump waste heat steam-water type heat supply system |
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