CN103629857A - Heat and power cogeneration centralized heat supply system based on heat pump - Google Patents
Heat and power cogeneration centralized heat supply system based on heat pump Download PDFInfo
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- CN103629857A CN103629857A CN201310655660.9A CN201310655660A CN103629857A CN 103629857 A CN103629857 A CN 103629857A CN 201310655660 A CN201310655660 A CN 201310655660A CN 103629857 A CN103629857 A CN 103629857A
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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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- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
Abstract
The invention discloses a heat and power cogeneration centralized heat supply system based on a heat pump. An absorption type heat exchanger unit and a multi-stage electrically-driven heat pump are introduced, and a heat source is used as a power source and is used for heat exchange repeatedly, so that the utilization efficiency of a steam heat source is improved, and heat can be better supplied to a user; a solar heat collector is introduced, and primary grid backwater is heated by using clean energy namely solar energy, so that the energy is saved, and the environment is protected; in addition, a heat exchanger is additionally arranged in a thermal power plant, the temperature of the primary grid backwater is raised by using a low-grade heat source in a condensing engine, and a double-effect steam absorption type heat pump, a single-effect steam absorption type heat pump, a large-temperature-difference steam absorption type heat pump and a steam water heat exchanger are simultaneously introduced to recover low-grade heat step by step, so that exhaust steam in a turbine is effectively utilized, and the energy utilization efficiency is improved. According to the system, the power generation efficiency of a power plant is improved by over 30 percent.
Description
Technical field
The invention belongs to thermoelectricity co-generating heat supplying field, relate 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.During the at present average generating efficiency Wei33%，Er steam power plant heat supply of 3,000,000 kilowatts of firepower electrical plants of China, generating efficiency can reach 20%, 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.The efficiency of in this sense ，Ze steam power plant 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 invention provides a kind of thermal power cogeneration central heating system based on heat pump.
The present invention 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 power 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 absorption type heat pump assemblys at different levels, 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, the secondary net backwater of 5 ℃ that vaporizer side from multistage electric drive heat pump is discharged is input in solar thermal collector a secondary net return water temperature is heated to 15 ℃, then by heat exchanger, enter in steam power plant's system.
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 invention has the beneficial effects as follows:
Introducing absorption heat exchange unit, multistage electric drive heat pump, repeatedly thermal source is carried out using with power source and heat exchange, improved 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;
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 simultaneously and reclaim step by step low-grade heat, 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 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
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, as the low-temperature heat source of absorption type heat pump assemblys at different levels, after heat exchange, return 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, the secondary net backwater of 5 ℃ that vaporizer side from multistage electric drive heat pump 11 is discharged is input in solar thermal collector 12 a secondary net return water temperature is heated to 15 ℃, then by heat exchanger 5, enter in steam power plant's system.
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 present invention is not limited to the present embodiment, and equivalent concepts or change in any technical scope disclosing in the present invention, all classify protection scope of the present invention 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;
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 of steam (8) in parallel, as the low-temperature heat source of absorption type heat pump assemblys at different levels, after heat exchange, return 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 of steam (8) 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, the secondary net backwater of 5 ℃ that vaporizer side from multistage electric drive heat pump (11) is discharged is input in solar thermal collector (12) a secondary net return water temperature is heated to 15 ℃, then by heat exchanger (5), enter in steam power plant's system.
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| 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 |
| EP3211356A4 (en) * | 2014-10-24 | 2018-06-20 | Zhongying Changjiang International New Energy Investment Co., Ltd | Method and apparatus for using excess heat from power plant flue gas to dry biomass fuel |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN109595669A (en) * | 2018-12-20 | 2019-04-09 | 大连民族大学 | Solar energy waste-heat recovery device |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| CN111351107A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Mixed solar energy heat supplementing lithium bromide heat pump heating method |
| CN111351252A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Cogeneration method for power plant |
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| 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 |
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| CN111351267A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Combined heating method of rear solar waste heat recovery device and lithium bromide heat pump |
| CN111351268A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Combined method for heat pump heating and float glass waste heat recovery by mixed-component heat compensation |
| CN111351265A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Thermoelectric combined water mixing and water dividing type heat pump heating method |
| CN111351105A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Lithium bromide heat pump heating method adopting rear solar heating |
| CN111351108A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Heat pump heat exchange method of lithium bromide with heat and power mixed and heat supplemented |
| CN111351106A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Method for post-heating and supplying float glass by heat pump output heat exchange water |
| CN111351253A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Postposition heat-increasing lithium bromide heat pump and power plant cogeneration heating method |
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