CN203718884U - Heat-pump-based combined heat and power generation centralized heating system - Google Patents

Heat-pump-based combined heat and power generation centralized heating system Download PDF

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Publication number
CN203718884U
CN203718884U CN201320789714.6U CN201320789714U CN203718884U CN 203718884 U CN203718884 U CN 203718884U CN 201320789714 U CN201320789714 U CN 201320789714U CN 203718884 U CN203718884 U CN 203718884U
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China
Prior art keywords
steam
heat
heat pump
pump
absorption heat
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Expired - Fee Related
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CN201320789714.6U
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Chinese (zh)
Inventor
姚伟君
毕海洋
迟建华
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Tianjin Bao Guanghuineng new energy technology Co., Ltd
Dalian Baoguang Energy Saving Air Conditioning Equipment Factory
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Dalian Baoguang Energy Saving Air Conditioning Equipment Factory
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Priority to CN201320789714.6U priority Critical patent/CN203718884U/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
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/14Combined heat and power generation [CHP]

Abstract

The utility model discloses a heat-pump-based combined heat and power generation centralized heating system. An absorption type heat exchanger unit and a multistage electrically-driven heat pump are introduced to perform heat exchange on a heat source for many times, so that the heat exchange efficiency is improved, and heat can be well supplied to a user; in addition, a heat exchanger is added in a thermal power plant, the low-grade heat source in a condensing engine is used for raising the temperature of return water of a primary network, and a steam double-effect absorption type heat pump, a steam single-effect absorption type heat pump, a steam large-temperature-difference absorption type heat pump and a steam-water heat exchanger are introduced to recover low-grade heat stage by stage, so that waste steam in a turbine is effectively utilized, and the utilization efficiency of energy resources is improved. According to the system, the power generation efficiency of a power plant is improved by over 30 percent.

Description

Thermal power cogeneration central heating system based on heat pump
Technical field
The utility model belongs to thermoelectricity co-generating heat supplying field, relates in particular to a kind of thermal power cogeneration central heating system based on heat pump.
Background technology
In recent years, along with the increasing of the increase of China's urban heat supplying area and industrial premises, building of production line, made China's heating power consumption figure rapid growth.From heat-supplying mode, analyze, China resident heating at present mainly contains following several mode: cogeneration of heat and power mode, middle-size and small-size district boiler room central heating, household small-size gas water-heating furnace, family's coal furnace etc.Wherein cogeneration of heat and power mode is to utilize after the high-grade heat energy power-generating of fuel, by the technology of the comprehensive utilization energy of its low grade heat energy heat supply.At present the average generating efficiency of 3,000,000 kilowatts of firepower electrical plants of China is 33%, and generating efficiency can reach 20% during steam power plant's heat supply, in 80% remaining heat, more than 70% can be used for heat supply.The fuel of 10000 kilojoule heats, adopts cogeneration of heat and power mode, can produce 2000 kilojoule electric power and 7000 kilojoule heats.And adopting the generating of common thermal power plant, this 2000 kilojoule electric power need consume 6000 kilojoule fuel.Therefore, the electric power of cogeneration of heat and power mode output is deducted to its fuel consumption according to the generating efficiency of common power plant, remaining 4000 kilojoule fuel can produce 7000 kilojoule heats.In this sense, the efficiency of steam power plant's heat supply is 170%, is about 2 times of medium small boiler room heating efficiency.Therefore when conditions permit, should first develop the heating system of cogeneration of heat and power.However, in cogeneration of heat and power mode, for hankering or existing some problems, for example: exhaust steam in steam turbine directly enters cooling tower and wasted a large amount of energy, a large amount of latent heats of vaporization are not fully used.The required steam of heat supply simultaneously greatly reduces generating efficiency etc.
Summary of the invention
For problems such as a large amount of latent heats of vaporization in exhaust steam in steam turbine can not be fully utilized, the utility model provides a kind of thermal power cogeneration central heating system based on heat pump.
The utility model is that the technical scheme that technical solution problem adopts is:
In steam power plant, in steam turbine, a part of high-temperature steam drives generator generating, another part high-temperature steam is input to respectively steam double-effect absorption heat pump, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam, vapor-water heat exchanger, as the thermal source participation heat exchange of absorption type heat pump assemblys at different levels;
Weary gas in steam turbine enters into condensing engine, wherein a part of heat exchange be that the hot water of 40 ℃ is input in heat exchanger is 25 ℃ by a secondary net backwater heat exchange of 15 ℃, another part accesses steam double-effect absorption heat pump, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam in parallel, as the low-temperature heat source of each grade of absorption type heat pump assembly, after heat exchange, return in condenser; 25 ℃ of hot water enters successively steam double-effect absorption heat pump, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam and is heated to respectively 55 ℃, 70 ℃, 90 ℃, finally enter vapor-water heat exchanger and steam heat-exchanging temperature and be increased to 110 ℃, as a secondary net, supply water and be input to absorption heat exchange unit;
In heat exchange station, one secondary net of 110 ℃ supplies water input absorption heat exchange unit as power source, after acting cooling, continue the low-temperature heat source as this absorption heat exchange unit, as temperature after low-temperature heat source heat exchange, be reduced to 25 ℃, this hot water of 25 ℃ is input to the vaporizer side in multistage electric drive heat pump as low-temperature heat source again to make condenser side provide the hot water heating of 60 ℃ for user, and the secondary net backwater of 5 ℃ that the vaporizer side from multistage electric drive heat pump is discharged is heated up after being 25 ℃ and entered in steam power plant's system by heat exchanger heat exchange.
Absorption heat pumps at different levels and vapor-water heat exchanger all adopt the steam turbine heating of the about 0.3MPa driving of drawing gas.
The beneficial effects of the utility model are:
Introducing absorption heat exchange unit, multistage electric drive heat pump, repeatedly thermal source is carried out to the efficiency that heat exchange has improved heat exchange, is better user's heat supply;
In steam power plant, add in addition heat exchanger, with the low-grade heat source in condensing engine, promote a secondary net backwater water temperature, introduce steam double-effect absorption heat pump, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam, vapor-water heat exchanger to reclaiming step by step low-grade heat simultaneously, effectively utilize the exhaust steam in steam turbine, improved efficiency of energy utilization.
Native system provides power plant's generating efficiency more than 30%.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
In figure: 1. steam turbine, 2. generator, 3. condensing engine, 4. cooling tower, 5. heat exchanger, 6. steam double-effect absorption heat pump, 7. steam single-effective absorption heat pump, the 8. large temperature difference absorption heat pump of steam, 9. vapor-water heat exchanger, 10. absorption heat exchange unit, 11. multistage electric drive heat pumps, 13. users
The specific embodiment
In steam power plant, in steam turbine 1, a part of high-temperature gas drives generator 2 generatings, another part high-temperature steam is input to respectively steam double-effect absorption heat pump 6, steam single-effective absorption heat pump 7, the large temperature difference absorption heat pump 8 of steam, vapor-water heat exchanger 9, as the power source participation heat exchange of absorption type heat pump assemblys at different levels;
Weary gas in steam turbine 1 enters into condensing engine 3, wherein a part of heat exchange be that the hot water of 40 ℃ is input in heat exchanger 5 is 25 ℃ by a secondary net backwater heat exchange of 15 ℃, another part accesses steam double-effect absorption heat pump 6, steam single-effective absorption heat pump 7, the large temperature difference absorption heat pump 8 of steam in parallel, low-temperature heat source as individual level absorption type heat pump assembly, returns after heat exchange in condenser 3; 25 ℃ of hot water enters successively steam double-effect absorption heat pump 6, steam single-effective absorption heat pump 7, the large temperature difference absorption heat pump 8 of steam and is heated to respectively 55 ℃, 70 ℃, 90 ℃, finally enter vapor-water heat exchanger 9 and be increased to 110 ℃ with steam heat-exchanging temperature, as a secondary net, supply water and be input to absorption heat exchange unit 10;
In heat exchange station, one secondary net of 110 ℃ supplies water input absorption heat exchange unit 10 as power source, after acting cooling, continue the low-temperature heat source as this absorption heat exchange unit 10, as temperature after low-temperature heat source heat exchange, be reduced to 25 ℃, this hot water of 25 ℃ is input to the vaporizer side in multistage electric drive heat pump 11 as low-temperature heat source again to make condenser side provide the hot water heating of 60 ℃ for user, and the secondary net backwater of 5 ℃ that the vaporizer side from multistage electric drive heat pump 11 is discharged is heated up after being 25 ℃ and entered in steam power plant's system by heat exchanger 5 heat exchange.
Absorption heat pumps at different levels and vapor-water heat exchanger all adopt the steam turbine heating of the about 0.3MPa driving of drawing gas.
The utility model is not limited to the present embodiment, and equivalent concepts or change in any technical scope disclosing at the utility model, all classify protection domain of the present utility model as.

Claims (1)

1. the thermal power cogeneration central heating system based on heat pump, is characterized in that:
In steam power plant, in steam turbine (1), a part of high-temperature steam drives generator (2) generating, another part high-temperature steam is input to respectively steam double-effect absorption heat pump (6), steam single-effective absorption heat pump (7), the large temperature difference absorption heat pump of steam (8), vapor-water heat exchanger (9), as the power source participation heat exchange of absorption type heat pump assemblys at different levels;
The exhaust steam pipeline of steam turbine connects condensing engine (3), and 40 ℃ of hot water pipelines after condensing engine (3) heat exchange are connected respectively to heat exchanger (5), steam double-effect absorption heat pump (6), steam single-effective absorption heat pump (7), the large temperature difference absorption heat pump of steam (8); Wherein the large temperature difference absorption heat pump of steam (8) connects vapor-water heat exchanger (9), in vapor-water heat exchanger (9), a secondary net of 110 ℃ supplies water to hold and connects successively absorption heat exchange unit (10), multistage electric drive heat pump (11), vaporizer side in multistage electric drive heat pump (11) connects heat exchanger (5), and heat exchanger (5) connects steam double-effect absorption heat pump (6), steam single-effective absorption heat pump (7), the large temperature difference absorption heat pump of steam (8) in turn.
CN201320789714.6U 2013-12-04 2013-12-04 Heat-pump-based combined heat and power generation centralized heating system Expired - Fee Related CN203718884U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320789714.6U CN203718884U (en) 2013-12-04 2013-12-04 Heat-pump-based combined heat and power generation centralized heating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320789714.6U CN203718884U (en) 2013-12-04 2013-12-04 Heat-pump-based combined heat and power generation centralized heating system

Publications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106402981A (en) * 2016-08-30 2017-02-15 洛阳双瑞特种装备有限公司 Large-temperature-difference waste heat recovery heat supply unit for electric drive heat pumps
CN106610044A (en) * 2016-12-29 2017-05-03 大连葆光节能空调设备厂 System for enlarging cogeneration centralized heat supply scale
CN108458390A (en) * 2018-05-05 2018-08-28 大连葆光节能空调设备厂 A kind of heating system of residual heat of electric power plant coupling industrial exhaust heat
CN108518719A (en) * 2018-03-30 2018-09-11 大连葆光节能空调设备厂 A kind of big temperature-difference central heating system using double condensers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106402981A (en) * 2016-08-30 2017-02-15 洛阳双瑞特种装备有限公司 Large-temperature-difference waste heat recovery heat supply unit for electric drive heat pumps
CN106610044A (en) * 2016-12-29 2017-05-03 大连葆光节能空调设备厂 System for enlarging cogeneration centralized heat supply scale
CN108518719A (en) * 2018-03-30 2018-09-11 大连葆光节能空调设备厂 A kind of big temperature-difference central heating system using double condensers
CN108458390A (en) * 2018-05-05 2018-08-28 大连葆光节能空调设备厂 A kind of heating system of residual heat of electric power plant coupling industrial exhaust heat

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ASS Succession or assignment of patent right

Owner name: TIANJIN BAOGUANG HUINENG NEW ENERGY TECHNOLOGY CO.

Effective date: 20150424

TR01 Transfer of patent right

Effective date of registration: 20150424

Address after: 116600, No. 306, building 3, north science and technology incubation base, No. 34, Harbin Road, Dalian Development Zone, Dalian, Liaoning

Patentee after: Dalian Baoguang Energy-saving Air Conditioning Equipment Plant

Patentee after: Tianjin Bao Guanghuineng new energy technology Co., Ltd

Address before: 116600, No. 306, building 3, north science and technology incubation base, No. 34, Harbin Road, Dalian Development Zone, Dalian, Liaoning

Patentee before: Dalian Baoguang Energy-saving Air Conditioning Equipment Plant

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140716

Termination date: 20151204

EXPY Termination of patent right or utility model