CN103673032A - System capable of greatly lowering combined heat and power generation centralized heating temperature - Google Patents
System capable of greatly lowering combined heat and power generation centralized heating temperature Download PDFInfo
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- CN103673032A CN103673032A CN201310655478.3A CN201310655478A CN103673032A CN 103673032 A CN103673032 A CN 103673032A CN 201310655478 A CN201310655478 A CN 201310655478A CN 103673032 A CN103673032 A CN 103673032A
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- steam
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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
The invention provides a system capable of greatly lowering the combined heat and power generation centralized heating temperature. A condensing engine low-grade heat source is introduced to a thermal power plant. Meanwhile, a steam double-effect absorption type heat pump, a steam single-effect absorption type heat pump and a steam large-temperature-difference absorption type heat pump are introduced and used for recycling low-grade heat stage by stage, dead steam in a turbine is effectively used, and the utilization efficiency of the energy is improved. The primary net supply water temperature is lowered to be 90 DEG C, the heating steam extraction flow of the thermal power plant is saved, and the power generation capacity of the thermal power plant is increased. Meanwhile, the heating water temperature is lowered, and therefore the consumption of thermal insulation materials is lowered, and the thermal losses of heating pipelines are reduced.
Description
Technical field
The invention belongs to thermoelectricity co-generating heat supplying field, relate in particular to a kind of system that significantly reduces cogeneration of heat and power central heating temperature.
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.In the steam heating pipeline of high temperature, need a large amount of insulation materials to reduce the loss of heat on the other hand; In the situation that heating temperature is higher, although use more insulation material can cause larger thermal losses.
Summary of the invention
For the problem that can not be fully utilized of a large amount of latent heats of vaporization in exhaust steam in steam turbine, and the shortcoming of a large amount of thermal losses in hot duct, the invention provides a kind of system that significantly reduces cogeneration of heat and power central heating temperature.
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, 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 condensing engine; 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 ℃, and the hot water of last 90 ℃ supplies water and is input to absorption heat exchange unit as a secondary net;
In heat exchange station, one secondary net of 90 ℃ 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 secondary net backwater of 25 ℃ enters in steam power plant's system by steam double-effect absorption heat pump.
Absorption heat pumps at different levels all adopt the steam turbine heating of the about 0.3MPa driving of drawing gas.
The invention has the beneficial effects as follows:
One secondary net supply water temperature is reduced to 90 ℃, has saved the heating amount of drawing gas of steam power plant, has increased the generating capacity of steam power plant; The reduction of the water temperature that simultaneously heats has been saved the consumption of insulation material and has been reduced heat supply pipeline thermal losses.
Introduce absorption heat exchange unit and improved the efficiency of heat exchange; Repeatedly thermal source being carried out using with power source and heat exchange, improved the utilization ratio of steam source, is better user's heat supply;
In steam power plant, introduce in addition condensing engine and reclaim low-grade heat source, introduce steam double-effect absorption heat pump, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam simultaneously, reclaim step by step low-grade heat, effectively utilized the exhaust steam in steam turbine, improved efficiency of energy utilization.
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, 10. absorption heat exchange unit, 13. users
The specific embodiment
In steam power 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, 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 condensing engine 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 ℃, and the hot water of last 90 ℃ supplies water and is input to absorption heat exchange unit 10 as a secondary net;
In heat exchange station, one secondary net of 90 ℃ 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 secondary net backwater of 25 ℃ enters in steam power plant's system by steam double-effect absorption heat pump 6.
Absorption heat pumps at different levels 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. significantly reduce a system for cogeneration of heat and power central heating temperature, 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 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), 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 condensing engine (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 ℃, and the hot water of last 90 ℃ supplies water and is input to absorption heat exchange unit (10) as a secondary net;
In heat exchange station, one secondary net of 90 ℃ 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 secondary net backwater of 25 ℃ enters in steam power plant's system by steam double-effect absorption heat pump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310655478.3A CN103673032A (en) | 2013-12-04 | 2013-12-04 | System capable of greatly lowering combined heat and power generation centralized heating temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655478.3A CN103673032A (en) | 2013-12-04 | 2013-12-04 | System capable of greatly lowering combined heat and power generation centralized heating temperature |
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| CN103673032A true CN103673032A (en) | 2014-03-26 |
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| CN201310655478.3A Pending CN103673032A (en) | 2013-12-04 | 2013-12-04 | System capable of greatly lowering combined heat and power generation centralized heating temperature |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964129A (en) * | 2020-08-17 | 2020-11-20 | 清华大学 | Building type absorption heat exchange station capable of realizing partition heat supply |
| CN112863147A (en) * | 2021-01-05 | 2021-05-28 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Thermal power plant heat utilization rate intelligent monitoring alarm system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05321612A (en) * | 1992-05-18 | 1993-12-07 | Tsukishima Kikai Co Ltd | Low pressure power generating method and device therefor |
| CN101231004A (en) * | 2008-02-28 | 2008-07-30 | 清华大学 | Large temperature-difference central heating system |
| CN101949612A (en) * | 2010-08-27 | 2011-01-19 | 清华大学 | Cooling mode driven by utilizing urban heat supply network |
| CN202973315U (en) * | 2012-12-25 | 2013-06-05 | 李同强 | Condensation heat recovery and heat supply device for power plants |
| CN103175247A (en) * | 2011-12-23 | 2013-06-26 | 河南艾莫卡节能科技有限公司 | Heating method of absorption type heat pump and multilevel series-connected absorption type heat pump heating system |
-
2013
- 2013-12-04 CN CN201310655478.3A patent/CN103673032A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05321612A (en) * | 1992-05-18 | 1993-12-07 | Tsukishima Kikai Co Ltd | Low pressure power generating method and device therefor |
| CN101231004A (en) * | 2008-02-28 | 2008-07-30 | 清华大学 | Large temperature-difference central heating system |
| CN101949612A (en) * | 2010-08-27 | 2011-01-19 | 清华大学 | Cooling mode driven by utilizing urban heat supply network |
| CN103175247A (en) * | 2011-12-23 | 2013-06-26 | 河南艾莫卡节能科技有限公司 | Heating method of absorption type heat pump and multilevel series-connected absorption type heat pump heating system |
| CN202973315U (en) * | 2012-12-25 | 2013-06-05 | 李同强 | Condensation heat recovery and heat supply device for power plants |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964129A (en) * | 2020-08-17 | 2020-11-20 | 清华大学 | Building type absorption heat exchange station capable of realizing partition heat supply |
| CN112863147A (en) * | 2021-01-05 | 2021-05-28 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Thermal power plant heat utilization rate intelligent monitoring alarm system |
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Application publication date: 20140326 |