CN103673031B - The system of cogeneration of heat and power central heating temperature is greatly reduced - Google Patents

The system of cogeneration of heat and power central heating temperature is greatly reduced Download PDF

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Publication number
CN103673031B
CN103673031B CN201310654739.XA CN201310654739A CN103673031B CN 103673031 B CN103673031 B CN 103673031B CN 201310654739 A CN201310654739 A CN 201310654739A CN 103673031 B CN103673031 B CN 103673031B
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steam
heat pump
temperature
heat
absorption heat
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CN103673031A (en
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姚伟君
毕海洋
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Dalian Baoguang energy saving air conditioning Co.,Ltd.
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Dalian Baoguang Energy Saving Air Conditioning Equipment Factory
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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

A kind of system that cogeneration of heat and power central heating temperature is greatly reduced, introduces absorption heat exchange unit, multistage electric drive heat pump, repeatedly carries out thermal source using with power source and heat exchange, improves the utilization ratio of steam source, be better user's heat supply;Introduce solar thermal collector, utilize this clean energy resource of solar energy that one secondary net backwater is carried out intensification energy-conserving and environment-protective;Additionally introduce steam double-effect absorption heat pump, steam single-effective absorption heat pump, the big temperature difference absorption heat pump of steam, reclaim low-grade heat step by step, effectively make use of the exhaust steam in steam turbine, improve efficiency of energy utilization.One secondary net supply water temperature is reduced to 90 DEG C, saves the heating amount of drawing gas of steam power plant, adds the generating capacity of steam power plant;The reduction of the water temperature that simultaneously heats saves the consumption of insulation material and decreases heat supply pipeline thermal losses.

Description

The system of cogeneration of heat and power central heating temperature is greatly reduced
Technical field
The invention belongs to thermoelectricity co-generating heat supplying field, particularly relate to a kind of system that cogeneration of heat and power central heating temperature is greatly reduced.
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 so that China's heating power consumption figure quickly increases.Being analyzed from heat-supplying mode, the resident's heating of current China mainly has following several ways: 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 after utilizing the high-grade heat energy power-generating of fuel, by the technology of the comprehensive energy utilization of its low grade heat energy heat supply.The average generating efficiency of 3,000,000 kilowatts of firepower electrical plants of current China is 33%, and during steam power plant's heat supply, generating efficiency is up to 20%, and more than 70% in remaining 80% heat 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 common thermal power plant to generate electricity, this 2000 kilojoule electric power need to consume 6000 kilojoule fuel.Therefore, according to the generating efficiency of common power plant, the electric power of cogeneration of heat and power mode output being deducted its fuel consumption, remaining 4000 kilojoule fuel can produce 7000 kilojoule heats.In this sense, then 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, the heating system of cogeneration of heat and power should be first developed.While it is true, in cogeneration of heat and power mode for hankering or there are some problems, for instance: exhaust steam in steam turbine is directly entered cooling tower and wastes substantial amounts of energy so that a large amount of latent heats of vaporization are not fully used.Steam needed for heat supply simultaneously greatly reduces generating efficiency etc..On the other hand the steam heating pipeline of high temperature need substantial amounts of insulation material to reduce the loss of heat;When heating temperature is higher, although using more insulation material can cause bigger thermal losses.
Summary of the invention
Can not be fully utilized problem and the shortcoming of a large amount of thermal losses in hot duct for a large amount of latent heats of vaporization in exhaust steam in steam turbine, the invention provides a kind of system that cogeneration of heat and power central heating temperature is greatly reduced.
The present invention solves that the technical scheme that technical problem adopts is:
In steam power plant, in steam turbine, a part of high-temperature steam drives electrical power generators, another part high-temperature steam is separately input to steam double-effect absorption heat pump, steam single-effective absorption heat pump, the big temperature difference absorption heat pump of steam, and the power source as absorption type heat pump assemblys at different levels participates in heat exchange;
Exhaust steam in steam turbine enters in condenser, the hot water of 40 DEG C after heat exchange accesses steam double-effect absorption heat pump, steam single-effective absorption heat pump, the big temperature difference absorption heat pump of steam in parallel, as the low-temperature heat source of absorption type heat pump assemblys at different levels, return in condenser after heat exchange;
In heat exchange station, one secondary net of 90 DEG C supplies water input absorption heat exchange unit as power source, the low-temperature heat source as this absorption heat exchange unit is continued after acting cooling, it is reduced to 25 DEG C as temperature after low-temperature heat source heat exchange, this hot water of 25 DEG C is input to the vaporizer side in multistage electric drive heat pump as low-temperature heat source again to make the hot water heating that condenser side provides the user 60 DEG C, one secondary net backwater of 5 DEG C of the vaporizer side discharge from multistage electric drive heat pump is input in solar thermal collector and a secondary net return water temperature is heated to 15 DEG C, 15 DEG C of hot water sequentially enter steam double-effect absorption heat pump, steam single-effective absorption heat pump, the big temperature difference absorption heat pump of steam is separately heated to 55 DEG C, 70 DEG C, 90 DEG C, the hot water input absorption heat exchange unit of 90 DEG C;
Absorption heat pumps at different levels all adopt the steam turbine heating of about 0.3MPa to draw gas driving.
The invention has the beneficial effects as follows:
One secondary net supply water temperature is reduced to 90 DEG C, saves the heating amount of drawing gas of steam power plant, adds the generating capacity of steam power plant;The reduction of the water temperature that simultaneously heats saves the consumption of insulation material and decreases heat supply pipeline thermal losses.
Introduce absorption heat exchange unit, multistage electric drive heat pump, repeatedly carry out thermal source using with power source and heat exchange, improve the utilization ratio of steam source, be better user's heat supply;
Introduce solar thermal collector, utilize this clean energy resource of solar energy that one secondary net backwater is carried out intensification energy-conserving and environment-protective;
Additionally introduce steam double-effect absorption heat pump, steam single-effective absorption heat pump, the big temperature difference absorption heat pump of steam, reclaim low-grade heat step by step, effectively make use of the exhaust steam in steam turbine, improve efficiency of energy utilization.
Native system provides power plants generating electricity efficiency more than 30%.
Accompanying drawing explanation
Fig. 1 is principles of the invention figure.
In figure: 1. steam turbine, 2. electromotor, 3. condenser, 4. cooling tower, 6. steam double-effect absorption heat pump, 7. steam single-effective absorption heat pump, the 8. big temperature difference absorption heat pump of steam, 10. absorption heat exchange unit, 11. multistage electric drive heat pump, 12. solar thermal collectors, 13. users
Detailed description of the invention
In steam power plant, in steam turbine 1, a part of high-temperature steam drives electromotor 2 to generate electricity, another part high-temperature steam is separately input to steam double-effect absorption heat pump 6, steam single-effective absorption heat pump 7, the big temperature difference absorption heat pump 8 of steam, and the power source as absorption type heat pump assemblys at different levels participates in heat exchange;
Exhaust steam in steam turbine 1 enters in condenser 3, the hot water of 40 DEG C after heat exchange accesses steam double-effect absorption heat pump 6, steam single-effective absorption heat pump 7, the big temperature difference absorption heat pump 8 of steam in parallel, as the low-temperature heat source of absorption type heat pump assemblys at different levels, return in condenser 3 after heat exchange;
In heat exchange station, one secondary net of 90 DEG C supplies water input absorption heat exchange unit 10 as power source, the low-temperature heat source as this absorption heat exchange unit 10 is continued after acting cooling, it is reduced to 25 DEG C as temperature after low-temperature heat source heat exchange, this hot water of 25 DEG C is input to the vaporizer side in multistage electric drive heat pump 11 as low-temperature heat source again to make the hot water heating that condenser side provides the user 60 DEG C, one secondary net backwater of 5 DEG C of the vaporizer side discharge from multistage electric drive heat pump 11 is input in solar thermal collector 12 and a secondary net return water temperature is heated to 15 DEG C, 15 DEG C of hot water sequentially enter steam double-effect absorption heat pump 6, steam single-effective absorption heat pump 7, the big temperature difference absorption heat pump 8 of steam is separately heated to 55 DEG C, 70 DEG C, 90 DEG C, the hot water input absorption heat exchange unit 10 of 90 DEG C.
Absorption heat pumps at different levels all adopt the steam turbine heating of about 0.3MPa to draw gas driving.
The present invention is not limited to the present embodiment, any equivalent concepts in the technical scope of present disclosure or change, is all classified as protection scope of the present invention.

Claims (1)

1. the system that cogeneration of heat and power central heating temperature is greatly reduced, it is characterised in that:
In steam power plant, in steam turbine (1), a part of high-temperature steam drives electromotor (2) generating, another part high-temperature steam is separately input to steam double-effect absorption heat pump (6), steam single-effective absorption heat pump (7), the big temperature difference absorption heat pump (8) of steam, and the power source as absorption type heat pump assemblys at different levels participates in heat exchange;
Exhaust steam in steam turbine (1) enters in condenser (3), the hot water of 40 DEG C after heat exchange accesses steam double-effect absorption heat pump (6), steam single-effective absorption heat pump (7), the big temperature difference absorption heat pump (8) of steam in parallel, as the low-temperature heat source of absorption type heat pump assemblys at different levels, return in condenser (3) after heat exchange;
In heat exchange station, one secondary net of 90 DEG C supplies water input absorption heat exchange unit (10) as power source, the low-temperature heat source as this absorption heat exchange unit (10) is continued after acting cooling, it is reduced to 25 DEG C as temperature after low-temperature heat source heat exchange, this hot water of 25 DEG C is input to the vaporizer side in multistage electric drive heat pump (11) to make the hot water heating that condenser side provides the user 60 DEG C as low-temperature heat source again, one secondary net backwater of 5 DEG C of the vaporizer side discharge from multistage electric drive heat pump (11) is input in solar thermal collector (12) and a secondary net return water temperature is heated to 15 DEG C, the hot water of 15 DEG C sequentially enters steam double-effect absorption heat pump (6), steam single-effective absorption heat pump (7), the big temperature difference absorption heat pump (8) of steam is separately heated to 55 DEG C, 70 DEG C, 90 DEG C, hot water input absorption heat exchange unit (10) of 90 DEG C.
CN201310654739.XA 2013-12-04 2013-12-04 The system of cogeneration of heat and power central heating temperature is greatly reduced Active CN103673031B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109631403A (en) * 2018-12-20 2019-04-16 大连民族大学 Power plant's cogeneration system
CN109631401A (en) * 2018-12-20 2019-04-16 大连民族大学 Power plant's cogeneration system of lithium bromide heat pump heating
CN109631395A (en) * 2018-12-20 2019-04-16 大连民族大学 Lithium bromide heat pump heating device
CN109631402A (en) * 2018-12-20 2019-04-16 大连民族大学 The float glass waste-heat recovery device of lithium bromide heat pump heating
CN109631404A (en) * 2018-12-20 2019-04-16 大连民族大学 The lithium bromide heat pump heating device of solar energy waste heat recycling
CN109631394A (en) * 2018-12-20 2019-04-16 大连民族大学 Integrate a variety of waste heat coupling heating systems

Citations (5)

* Cited by examiner, † Cited by third party
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CN101109539A (en) * 2006-07-17 2008-01-23 葆光(大连)节能技术研究所有限公司 Method for enlarging thermoelectricity co-generating heat supplying scale
CN101329117A (en) * 2008-07-23 2008-12-24 北京环能瑞通科技发展有限公司 Integral type absorption type heat exchange machine unit
WO2010046450A1 (en) * 2008-10-22 2010-04-29 Mwm Gmbh Combined heat and power generation subsystem, combined heat and power generation system, and method for the operation of a combined heat and power generation system
CN202118983U (en) * 2011-06-10 2012-01-18 安徽省科捷再生能源利用有限公司 Thermal power cogeneration central heating system based on absorption heat transfer
CN203685321U (en) * 2013-12-04 2014-07-02 大连葆光节能空调设备厂 System for greatly lowering central heating temperature of heat and power cogeneration

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101109539A (en) * 2006-07-17 2008-01-23 葆光(大连)节能技术研究所有限公司 Method for enlarging thermoelectricity co-generating heat supplying scale
CN101329117A (en) * 2008-07-23 2008-12-24 北京环能瑞通科技发展有限公司 Integral type absorption type heat exchange machine unit
WO2010046450A1 (en) * 2008-10-22 2010-04-29 Mwm Gmbh Combined heat and power generation subsystem, combined heat and power generation system, and method for the operation of a combined heat and power generation system
CN202118983U (en) * 2011-06-10 2012-01-18 安徽省科捷再生能源利用有限公司 Thermal power cogeneration central heating system based on absorption heat transfer
CN203685321U (en) * 2013-12-04 2014-07-02 大连葆光节能空调设备厂 System for greatly lowering central heating temperature of heat and power cogeneration

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

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