CN103670548A - Heat and power cogeneration central heating system based on heat pump - Google Patents
Heat and power cogeneration central heating system based on heat pump Download PDFInfo
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- CN103670548A CN103670548A CN201310655431.7A CN201310655431A CN103670548A CN 103670548 A CN103670548 A CN 103670548A CN 201310655431 A CN201310655431 A CN 201310655431A CN 103670548 A CN103670548 A CN 103670548A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- 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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
Provided is a heat and power cogeneration central heating system based on a heat pump. An absorption heat exchanging unit is introduced, a heat source is subjected to power source and heat exchanging using for multiple times, steam heat source using efficiency is improved, and heat is better provided for a user. A steam double-effect absorption heat pump, a steam single-effect absorption heat pump, a steam large-temperature-difference absorption heat pump and a steam-water heat exchanger are introduced for recycling low-grade heat step-by-step, dead steam in a steam turbine is effectively used, and energy using efficiency is improved. The system improves power plant generating efficiency by more than 30%.
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 technique
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 heat supply, household small-size gas water-heating furnace, family's coal stove 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 thermoelectricity 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 thermoelectricity 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 invention provides a kind of thermal power cogeneration central heating system based on heat pump.
The present invention is that the technological scheme that technical solution problem adopts is:
In thermoelectricity 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, after heat exchange, the hot water of 40 ℃ 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 vapour condenser; 25 ℃ of one secondary net backwater 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 ℃ enters in thermoelectricity plant's system by steam double-effect absorption heat pump.
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, 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;
Introducing 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 reclaim low-grade heat step by step, have effectively utilized the exhaust steam in steam turbine, have 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, 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, 13. users
Embodiment
In thermoelectricity plant, in steam turbine 1, a part of high-temperature steam 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, after heat exchange, the hot water of 40 ℃ 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 vapour condenser 3; 25 ℃ of one secondary net backwater 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 ℃ enters in thermoelectricity plant's system by steam double-effect absorption heat pump 6.
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 thermoelectricity 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), after heat exchange, the hot water of 40 ℃ 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 vapour condenser (3); 25 ℃ of one secondary net backwater 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 ℃ enters in thermoelectricity plant's system by steam double-effect absorption heat pump (6).
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| CN201310655431.7A CN103670548A (en) | 2013-12-04 | 2013-12-04 | Heat and power cogeneration central heating system based on heat pump |
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| CN201310655431.7A CN103670548A (en) | 2013-12-04 | 2013-12-04 | Heat and power cogeneration central heating system based on heat pump |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034086A (en) * | 2014-06-11 | 2014-09-10 | 内蒙古京能盛乐热电有限公司 | Large-sized concentrated refrigerating equipment for coal-fired unit and refrigerating method for large-sized concentrated refrigerating equipment |
| CN104533551A (en) * | 2014-08-29 | 2015-04-22 | 中国华能集团清洁能源技术研究院有限公司 | Waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method |
| 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 |
| CN108079611A (en) * | 2018-02-08 | 2018-05-29 | 燕山大学 | A kind of intermediate reboiler step heating system based on absorption heat pump |
| CN108870502A (en) * | 2018-03-30 | 2018-11-23 | 大连葆光节能空调设备厂 | A kind of big temperature-difference central heating system using double condensers |
| 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 |
| 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 |
| CN109595677A (en) * | 2018-12-20 | 2019-04-09 | 大连民族大学 | The lithium bromide heat pump heating device that heat pump is mixed with plate heat exchanger |
| CN109631399A (en) * | 2018-12-20 | 2019-04-16 | 大连民族大学 | The device of joint supply circulation intermediary's water of dual-heating mode heat pump and waste heat recycling float glass |
| CN109695969A (en) * | 2018-12-20 | 2019-04-30 | 大连民族大学 | The lithium bromide heat pump heating device that the heat pump of power plant's cogeneration of heat and power is mixed with plate heat exchanger |
| CN109751790A (en) * | 2018-12-20 | 2019-05-14 | 大连民族大学 | The waste heat of height product heat source couples heating system |
| CN111351116A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Heating method of lithium bromide heat pump with heat pump and plate heat exchanger mixed for cogeneration of power plant |
| CN111351262A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Waste heat coupling heating method for high-low grade heat source |
| CN111351110A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Solar energy supplied lithium bromide heat pump heat supply method |
| CN111351260A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Rear-mounted heating waste heat coupling method |
| CN111351113A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Lithium bromide heat pump heating method with heat pump and plate heat exchanger mixed |
| CN113280390A (en) * | 2021-05-17 | 2021-08-20 | 浙江大学 | Deep peak regulation heat supply grade improving system and method based on heat pump boosting reheating |
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| CN101949612A (en) * | 2010-08-27 | 2011-01-19 | 清华大学 | Cooling mode driven by utilizing urban heat supply network |
| CN102226542A (en) * | 2011-06-03 | 2011-10-26 | 北京建筑工程学院 | Ejector type heat pump heat transfer set |
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| JP3119718B2 (en) * | 1992-05-18 | 2000-12-25 | 月島機械株式会社 | Low voltage power generation method and device |
| CN101231004A (en) * | 2008-02-28 | 2008-07-30 | 清华大学 | Large temperature-difference central heating system |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034086A (en) * | 2014-06-11 | 2014-09-10 | 内蒙古京能盛乐热电有限公司 | Large-sized concentrated refrigerating equipment for coal-fired unit and refrigerating method for large-sized concentrated refrigerating equipment |
| CN104533551A (en) * | 2014-08-29 | 2015-04-22 | 中国华能集团清洁能源技术研究院有限公司 | Waste heat recovery IGCC (integrated gasification combined cycle) combined heat and power generation central heating system and method |
| CN104533551B (en) * | 2014-08-29 | 2016-03-30 | 中国华能集团清洁能源技术研究院有限公司 | The IGCC thermal power cogeneration central heating system of recovery waste heat and method |
| 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 |
| CN108079611A (en) * | 2018-02-08 | 2018-05-29 | 燕山大学 | A kind of intermediate reboiler step heating system based on absorption heat pump |
| CN108870502A (en) * | 2018-03-30 | 2018-11-23 | 大连葆光节能空调设备厂 | A kind of big temperature-difference central heating system using double condensers |
| CN109595677A (en) * | 2018-12-20 | 2019-04-09 | 大连民族大学 | The lithium bromide heat pump heating device that heat pump is mixed with plate heat exchanger |
| 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 |
| 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 |
| CN109631399A (en) * | 2018-12-20 | 2019-04-16 | 大连民族大学 | The device of joint supply circulation intermediary's water of dual-heating mode heat pump and waste heat recycling float glass |
| CN109695969A (en) * | 2018-12-20 | 2019-04-30 | 大连民族大学 | The lithium bromide heat pump heating device that the heat pump of power plant's cogeneration of heat and power is mixed with plate heat exchanger |
| CN109751790A (en) * | 2018-12-20 | 2019-05-14 | 大连民族大学 | The waste heat of height product heat source couples heating system |
| CN111351116A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Heating method of lithium bromide heat pump with heat pump and plate heat exchanger mixed for cogeneration of power plant |
| CN111351262A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Waste heat coupling heating method for high-low grade heat source |
| CN111351110A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Solar energy supplied lithium bromide heat pump heat supply method |
| CN111351260A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Rear-mounted heating waste heat coupling method |
| CN111351113A (en) * | 2018-12-20 | 2020-06-30 | 大连民族大学 | Lithium bromide heat pump heating method with heat pump and plate heat exchanger mixed |
| CN113280390A (en) * | 2021-05-17 | 2021-08-20 | 浙江大学 | Deep peak regulation heat supply grade improving system and method based on heat pump boosting reheating |
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Application publication date: 20140326 |