CN203685321U - System for greatly lowering central heating temperature of heat and power cogeneration - Google Patents
System for greatly lowering central heating temperature of heat and power cogeneration Download PDFInfo
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- CN203685321U CN203685321U CN201320800982.3U CN201320800982U CN203685321U CN 203685321 U CN203685321 U CN 203685321U CN 201320800982 U CN201320800982 U CN 201320800982U CN 203685321 U CN203685321 U CN 203685321U
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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 utility model relates to a system for greatly lowering central heating temperature of the heat and power cogeneration. In the system, an absorption heat-exchange unit and a multi-level electrically-driven thermal pump are introduced, so as to repeatedly perform utilization of power source and heat exchange on the heat source, so that the utilization efficiency of the steam heat source is improved and the system can better supply heat to a user; a solar thermal collector is introduced; solar energy, as clean energy, is utilized to increase temperature, conserve energy and protect environment on the primary backwater network; besides, a steam dual-purpose absorption heat pump, a steam single-effect absorption heat pump and a steam large- temperature-difference absorption heat pump are introduced to recycle low-grade heat quantities step by step; exhaust steam in a steam turbine is effectively utilized and the utilization efficiency of the energy source is improved; as the temperature of a primary water supply network is decreased to 90 DEC, heating steam extraction quantity is saved in the thermal power plant and the power generation capacity of the thermal power plant is improved; moreover, the heat preservation material consumption and thermal losses of a heating pipeline are saved as a result of the decrease of the heating water temperature.
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 heat supply temperature.
Background technique
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 in recent years.Analyze from heat-supplying mode, 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% when 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 in the time of conditions permit, should first develop the heating system of cogeneration of heat and power.However, 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 in cogeneration of heat and power mode.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 thermal insulating materials to reduce the loss of heat on the other hand; In the situation that heating temperature is higher, although use more thermal insulating material can cause larger heat loss.
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 heat losss in hot duct, the invention provides a kind of system that significantly reduces cogeneration of heat and power central heat supply temperature.
The present invention for 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, participates in heat exchange as the power source of absorption type heat pump assemblys at different levels;
Weary gas in steam turbine enters into condensing engine, the hot water of 40 DEG C after heat exchange 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;
In heat exchange station, one secondary net of 90 DEG C 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, be 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 condenser side provide the hot water heating of 60 DEG C for user, the secondary net backwater of 5 DEG C 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 DEG C, the hot water of 15 DEG C enters steam double-effect absorption heat pump successively, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam is heated to respectively 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 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 DEG C, has saved the heating amount of drawing gas of thermoelectricity plant, has increased the generating capacity of thermoelectricity plant; The reduction of the water temperature that simultaneously heats has been saved the consumption of thermal insulating material and has been reduced heat supply pipeline heat loss.
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 the secondary net backwater energy-conserving and environment-protective that heat up;
Introduce in addition steam double-effect absorption heat pump, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam, reclaim step by step low-grade heat, effectively utilized the exhaust steam in steam turbine, improved efficiency of energy utilization.
Native system provides power plant's generating efficiency more than 30%.
Brief description of the drawings
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, 11. multistage electric drive heat pumps, 12. solar thermal collectors, 13. users
Embodiment
In thermoelectricity plant, in steam turbine 1, a part of high-temperature steam drives generator 2 to generate electricity, 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, participates in heat exchange as the thermal source of absorption type heat pump assemblys at different levels;
Weary gas in steam turbine 1 enters into condensing engine 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 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;
In heat exchange station, one secondary net of 90 DEG C 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, be 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 condenser side provide the hot water heating of 60 DEG C for user, the secondary net backwater of 5 DEG C 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 DEG C, the hot water of 15 DEG C 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 is heated to respectively 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 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. a system that significantly reduces cogeneration of heat and power central heat supply temperature, 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), participates in heat exchange as the power source of absorption type heat pump assemblys at different levels;
Weary gas in steam turbine (1) enters into condensing engine (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 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);
In heat exchange station, one secondary net of 90 DEG C 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), be 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 condenser side provide the hot water heating of 60 DEG C for user, the secondary net backwater of 5 DEG C 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 DEG C, the hot water of 15 DEG C enters steam double-effect absorption heat pump (6) successively, steam single-effective absorption heat pump (7), the large temperature difference absorption heat pump of steam (8) is heated to respectively 55 DEG C, 70 DEG C, 90 DEG C, the hot water input absorption heat exchange unit (10) of 90 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800982.3U CN203685321U (en) | 2013-12-04 | 2013-12-04 | System for greatly lowering central heating temperature of heat and power cogeneration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320800982.3U CN203685321U (en) | 2013-12-04 | 2013-12-04 | System for greatly lowering central heating temperature of heat and power cogeneration |
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| CN203685321U true CN203685321U (en) | 2014-07-02 |
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| CN201320800982.3U Withdrawn - After Issue CN203685321U (en) | 2013-12-04 | 2013-12-04 | System for greatly lowering central heating temperature of heat and power cogeneration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673031A (en) * | 2013-12-04 | 2014-03-26 | 大连葆光节能空调设备厂 | System capable of greatly lowering combined heat and power generation centralized heating temperature |
-
2013
- 2013-12-04 CN CN201320800982.3U patent/CN203685321U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673031A (en) * | 2013-12-04 | 2014-03-26 | 大连葆光节能空调设备厂 | System capable of greatly lowering combined heat and power generation centralized heating temperature |
| CN103673031B (en) * | 2013-12-04 | 2016-06-29 | 大连葆光节能空调设备厂 | The system of cogeneration of heat and power central heating temperature is greatly reduced |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN BAOGUANG HUINENG NEW ENERGY TECHNOLOGY CO. Effective date: 20150424 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150424 Address after: 116600, No. 306, building 3, north science and technology incubation base, No. 34, Harbin Road, Dalian Development Zone, Dalian, Liaoning Patentee after: Dalian Baoguang Energy-saving Air Conditioning Equipment Plant Patentee after: Tianjin Bao Guanghuineng new energy technology Co., Ltd Address before: 116600, No. 306, building 3, north science and technology incubation base, No. 34, Harbin Road, Dalian Development Zone, Dalian, Liaoning Patentee before: Dalian Baoguang Energy-saving Air Conditioning Equipment Plant |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140702 Effective date of abandoning: 20160629 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |