CN103629857B - Based on the thermal power cogeneration central heating system of heat pump - Google Patents

Based on the thermal power cogeneration central heating system of heat pump Download PDF

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Publication number
CN103629857B
CN103629857B CN201310655660.9A CN201310655660A CN103629857B CN 103629857 B CN103629857 B CN 103629857B CN 201310655660 A CN201310655660 A CN 201310655660A CN 103629857 B CN103629857 B CN 103629857B
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steam
heat pump
deg
heat
temperature
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CN201310655660.9A
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CN103629857A (en
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毕海洋
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大连大学
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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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/20Adapting or protecting infrastructure or their operation in buildings, dwellings or related infrastructures
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Abstract

Based on a thermal power cogeneration central heating system for heat pump, by introducing absorption heat exchange unit, multistage electric drive heat pump, repeatedly carry out using with power source and heat exchange to thermal source, improve the utilization ratio of steam source, is better user's heat supply; Introduce solar thermal collector, utilize this clean energy resource of solar energy to heat up to a secondary net backwater, energy-conserving and environment-protective; Heat exchanger is added in addition in steam power plant, a secondary net backwater water temperature is promoted with the low-grade heat source in condensing engine, introducing steam double-effect absorption heat pump, steam single-effective absorption heat pump, steam large temperature difference absorption heat pump, vapor-water heat exchanger reclaim low-grade heat step by step simultaneously, 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%.

Description

Based on the thermal power cogeneration central heating system of heat pump

Technical field

The invention belongs to thermoelectricity co-generating heat supplying field, particularly relate 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, China's heating power consumption figure is increased fast.Analyze from heat-supplying mode, current China resident heating 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 after the high-grade heat energy power-generating utilizing fuel, by the technology of the comprehensive energy utilization of its low grade heat energy heat supply.The average generating efficiency of current China 3,000,000 kilowatts of firepower electrical plants is 33%, and during steam power plant's heat supply, generating efficiency can reach 20%, and 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 common thermal power plant to generate electricity, this 2000 kilojoule electric power need consume 6000 kilojoule fuel.Therefore, the electric power of cogeneration of heat and power mode output is deducted its fuel consumption according to the generating efficiency of common power plant, 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.However, in cogeneration of heat and power mode for hankering or there are some problems, such as: exhaust steam in steam turbine directly enters cooling tower and wastes a large amount of energy, a large amount of latent heat of vaporization is not fully used.Steam simultaneously needed for heat supply 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 invention provides a kind of thermal power cogeneration central heating system based on heat pump.

The technical scheme that the present invention adopts for technical solution problem is:

In steam power plant, in steam turbine, a part of high-temperature steam drives electrical power generators, another part high-temperature steam is input to 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 respectively, and the power source as absorption type heat pump assembly at different levels participates in heat exchange;

Weary gas in steam turbine enters into condensing engine, wherein a part of heat exchange is that the hot water of 40 DEG C to be input to a secondary net backwater heat exchange of 15 DEG C in heat exchanger is 25 DEG C, 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 absorption type heat pump assembly at different levels, return after heat exchange in condensing engine; 25 DEG C of hot water enters steam double-effect absorption heat pump successively, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam are heated to 55 DEG C, 70 DEG C, 90 DEG C respectively, finally enter vapor-water heat exchanger and steam heat-exchanging temperature is increased to 110 DEG C, supplying water as a secondary net is input to absorption heat exchange unit;

In heat exchange station, one secondary net of 110 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, 25 DEG C are reduced to 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 condenser side provide the hot water heating of 60 DEG C for user, be input in solar thermal collector from a secondary net backwater of 5 DEG C of the vaporizer side discharge multistage electric drive heat pump and a secondary net return water temperature is heated to 15 DEG C, then entered in steam power plant's system by heat exchanger.

Absorption heat pump at different levels and vapor-water heat exchanger all adopt the steam turbine of about 0.3MPa to heat and to draw gas driving.

The invention has the beneficial effects as follows:

Introduce absorption heat exchange unit, multistage electric drive heat pump, repeatedly carry out using with power source and heat exchange to thermal source, improve the utilization ratio of steam source, is better user's heat supply;

Introduce solar thermal collector, utilize this clean energy resource of solar energy to heat up to a secondary net backwater, energy-conserving and environment-protective;

Heat exchanger is added in addition in steam power plant, a secondary net backwater water temperature is promoted with the low-grade heat source in condensing engine, introducing steam double-effect absorption heat pump, steam single-effective absorption heat pump, steam large temperature difference absorption heat pump, vapor-water heat exchanger reclaim low-grade heat step by step simultaneously, 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 schematic diagram of the present invention.

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, 8. the large temperature difference absorption heat pump of steam, 9. vapor-water heat exchanger, 10. absorption heat exchange unit, 11. multistage electric drive heat pumps, 12. solar thermal collectors, 13. users

Detailed description of the invention

In steam power plant, in steam turbine 1, a part of high-temperature gas drives generator 2 to generate electricity, another part high-temperature steam is input to 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 respectively, and the power source as absorption type heat pump assembly at different levels participates in heat exchange;

Weary gas in steam turbine 1 enters into condensing engine 3, wherein a part of heat exchange is that the hot water of 40 DEG C to be input to a secondary net backwater heat exchange of 15 DEG C in heat exchanger 5 is 25 DEG C, 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, as the low-temperature heat source of absorption type heat pump assembly at different levels, return in condensing engine 3 after heat exchange; 25 DEG C of hot water enters steam double-effect absorption heat pump 6 successively, steam single-effective absorption heat pump 7, the large temperature difference absorption heat pump 8 of steam are heated to 55 DEG C, 70 DEG C, 90 DEG C respectively, finally enter vapor-water heat exchanger 9 and be increased to 110 DEG C with steam heat-exchanging temperature, supplying water as a secondary net is input to absorption heat exchange unit 10;

In heat exchange station, one secondary net of 110 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, 25 DEG C are reduced to 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 condenser side provide the hot water heating of 60 DEG C for user, be input in solar thermal collector 12 from a secondary net backwater of 5 DEG C of the vaporizer side discharge multistage electric drive heat pump 11 and a secondary net return water temperature is heated to 15 DEG C, then entered in steam power plant's system by heat exchanger 5.

Absorption heat pump at different levels and vapor-water heat exchanger all adopt the steam turbine of about 0.3MPa to heat and to draw gas driving.

The present invention is not limited to the present embodiment, any the present invention disclose technical scope in equivalent concepts or change, be all classified as protection scope of the present invention.

Claims (1)

1., based on a thermal power cogeneration central heating system for heat pump, it 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 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) respectively, and the power source as absorption type heat pump assembly at different levels participates in heat exchange;
Weary gas in steam turbine (1) enters into condensing engine (3), wherein a part of heat exchange is that the hot water of 40 DEG C to be input to a secondary net backwater heat exchange of 15 DEG C in heat exchanger (5) is 25 DEG C, 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, as the low-temperature heat source of absorption type heat pump assembly at different levels, return in condensing engine (3) after heat exchange; 25 DEG C of hot water enters steam double-effect absorption heat pump (6) successively, steam single-effective absorption heat pump (7), the large temperature difference absorption heat pump (8) of steam are heated to 55 DEG C, 70 DEG C, 90 DEG C respectively, finally enter vapor-water heat exchanger (9) and be increased to 110 DEG C with steam heat-exchanging temperature, supplying water as a secondary net is input to absorption heat exchange unit (10);
In heat exchange station, one secondary net of 110 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, 25 DEG C are reduced to 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 condenser side provide the hot water heating of 60 DEG C for user, be input in solar thermal collector (12) from a secondary net backwater of 5 DEG C of the vaporizer side discharge multistage electric drive heat pump (11) and a secondary net return water temperature is heated to 15 DEG C, then entered in steam power plant's system by heat exchanger (5).
CN201310655660.9A 2013-12-04 2013-12-04 Based on the thermal power cogeneration central heating system of heat pump CN103629857B (en)

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CN104329923B (en) * 2014-10-24 2016-06-15 中盈长江国际新能源投资有限公司 Utilize method and the equipment thereof of power-plant flue gas waste heat dried biomass fuel
CN104481611A (en) * 2014-12-26 2015-04-01 北京中科华誉能源技术发展有限责任公司 Dead steam waste heat recovery system based on large temperature difference heat exchange technology
CN104964479A (en) * 2015-07-07 2015-10-07 中能世华(北京)节能科技有限公司 Fuel gas combined heat and power generation heating supply system based on absorption-type heat exchange
CN108626766A (en) * 2018-05-05 2018-10-09 大连葆光节能空调设备厂 A kind of coupling heating system using waste heat of plant and residual heat of electric power plant
CN109654591A (en) * 2018-12-20 2019-04-19 大连民族大学 The waste heat coupled system of the postposition gain of heat
CN109631400A (en) * 2018-12-20 2019-04-16 大连民族大学 Use the waste heat recycling of solar energy waste heat concurrent heating and heating installation
CN109595675A (en) * 2018-12-20 2019-04-09 大连民族大学 The integrated collection system of solar heat and lithium bromide heat pump heating
CN109682109A (en) * 2018-12-20 2019-04-26 大连民族大学 The lithium bromide heat pump and power plant's cogeneration of heat and power heating installation of the postposition gain of heat
CN109631397A (en) * 2018-12-20 2019-04-16 大连民族大学 Heat pump exports the device of the heating of heat-exchanging water postposition and supply float glass
CN109595670A (en) * 2018-12-20 2019-04-09 大连民族大学 The heat pump heat exchanging device of the mixed lithium bromide for dividing concurrent heating of thermoelectricity
CN109595669A (en) * 2018-12-20 2019-04-09 大连民族大学 Solar energy waste-heat recovery device
CN109595667A (en) * 2018-12-20 2019-04-09 大连民族大学 Mixed point of solar energy concurrent heating lithium bromide heat pump heating device
CN109595676A (en) * 2018-12-20 2019-04-09 大连民族大学 The combination unit of the mixed heat pump heating for dividing concurrent heating and the recycling of float glass waste heat
CN109631398A (en) * 2018-12-20 2019-04-16 大连民族大学 The lithium bromide heat pump heating device of postposition solar energy heating
CN109595673A (en) * 2018-12-20 2019-04-09 大连民族大学 The united heat device of postposition solar energy waste-heat recovery device and lithium bromide heat pump
CN109595674A (en) * 2018-12-20 2019-04-09 大连民族大学 The float glass waste heat of lithium bromide pump coupled heat solar energy recycles heating system
CN109595668A (en) * 2018-12-20 2019-04-09 大连民族大学 The concurrent heating of solar energy and lithium bromide heat pump and heating installation

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