CN102537935A - Heat regenerative system adopting jet-type heat pumps - Google Patents
Heat regenerative system adopting jet-type heat pumps Download PDFInfo
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- CN102537935A CN102537935A CN2012100477191A CN201210047719A CN102537935A CN 102537935 A CN102537935 A CN 102537935A CN 2012100477191 A CN2012100477191 A CN 2012100477191A CN 201210047719 A CN201210047719 A CN 201210047719A CN 102537935 A CN102537935 A CN 102537935A
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Abstract
The invention relates to a heat regenerative system adopting jet-type heat pumps. The heat regenerative system comprises a plurality of levels of heaters which are successively connected, wherein the heater of each level is respectively connected with an extraction steam pipeline of the level, and an indirect heater is arranged between the heaters of every two adjacent levels and is communicated with the heaters of the two adjacent levels; and a jet-type heat pump is arranged between the extraction steam pipelines of the heaters of every two adjacent levels, is communicated with the extraction steam pipelines of the heaters of the two adjacent levels and are corresponding to the indirect heater of the level, and the outlet of each jet-type heat pump is connected with the inlet of each indirect heater. The jet-type heat pumps are arranged in the heat regenerative system provided by the invention, extraction steam with higher pressure is utilized to inject lower-level extraction steam with lower pressure, so that mixed steam the pressure of which is between the pressures of two levels of extraction pressure is generated; and an indirect regenerative heater utilizing the mixed stream as a heating stream source is additionally arranged, thereby reducing the irreversible loss of a regenerative process, and improving the heat efficiency of a machine set.
Description
Technical field
The present invention relates to a kind of heat regenerative system, be specifically related to a kind of heat regenerative system that adopts the injecting type heat pump.
Background technology
Modern large electric power plant unit all adopts backheat to improve its heat-economy.From the thermodynamics angle, backheat progression is many more, and the thermal efficiency of unit is also high more, but because the restriction of factors such as steam turbine structure is restricted the increase of backheat progression, the large electric power plant unit generally adopts 7-9 level backheat at present.Thermal power plant's bleeder heater adopts the Steam Heating feedwater, owing to have the temperature difference between steam and the feedwater, thus cause irreversible loss.The temperature difference of steam and feedwater is big more, and its irreversible loss is also big more.
Summary of the invention
The object of the present invention is to provide a kind of irreversible loss that can reduce heat recovery process, improve the thermal efficiency of unit, the heat regenerative system of injecting type heat pump is significantly adopted in energy-saving and emission-reduction.
For achieving the above object; The technical scheme that the present invention adopts is: comprise some grades of heaters that link to each other successively; Heaters at different levels link to each other with the bleed steam pipework of this grade respectively; Between each adjacent double-bank heater, be provided with the indirect heater that is connected with said two-stage neighboring heater; Between the bleed steam pipework of each adjacent double-bank heater, be provided be connected with the bleed steam pipework of said adjacent double-bank heater and with this level corresponding injecting type heat pump of heater indirectly, the outlet of described injecting type heat pump links to each other with the inlet of indirect type heater.
Described each adjacent double-bank heater is defined as heater at the corresponding levels and next stage heater; The high pressure nozzle of injecting type heat pump links to each other with heater bleed steam pipework at the corresponding levels; The low-pressure nozzle of injecting type heat pump links to each other with next stage heater bleed steam pipework, and the middle pressure nozzle of injecting type heat pump is connected through the indirect heater of pipeline and this level.
The present invention introduces the injecting type heat pump in heat regenerative system; Utilize the higher lower next stage of injection pressure that draws gas of pressure to draw gas; Produce the mixed vapour of pressure between this two-stage extraction pressure; And increase by one with this mixed vapour as the indirect bleeder heater that adds hot vapour source, thereby reduce the irreversible loss of heat recovery process, improve the thermal efficiency of unit.Calculating shows, it is about 1% to adopt this technology that its thermal efficiency is improved relatively to the 1000MW unit, and the energy-saving and emission-reduction benefit is obvious.
Description of drawings
Fig. 1 is the heat regenerative system principle schematic that adopts the injecting type heat pump;
Fig. 2 is the warm enthalpy diagram of backheat heating process;
Fig. 3 is the schematic diagram of injecting type heat pump.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is explained further details.
Because thermal power plant's bleeder heater adopts the Steam Heating feedwater, owing to have the temperature difference between steam and the feedwater, thus cause irreversible loss.The temperature difference of steam and feedwater is big more, and its irreversible loss is also big more.Fig. 2 has provided the warm enthalpy diagram of backheat heating process, can find out from this figure, under the constant situation of heater terminal difference, increases the temperature difference that backheat progression can reduce heat recovery process, thereby reduces the irreversible loss of heat recovery process.But receive the restriction of factors such as steam turbine structure in the reality, present large-scale coal fired power generation unit generally adopts 7-9 level regenerative steam, and its corresponding bleeder heater progression also is the 7-9 level.In order to increase the progression of bleeder heater; The present invention proposes and adopt the injecting type heat pump; Utilize higher lower the drawing gas of injection next stage pressure of drawing gas of pressure; Produce the mixed vapour of pressure between this two-stage is drawn gas as the hot vapour source that adds that increases bleeder heater newly, thereby under the situation that does not increase extracted steam from turbine progression, improve the progression of bleeder heater.
Referring to Fig. 1,3; The present invention includes and comprise some grades of heaters that link to each other successively; Heaters at different levels link to each other with the bleed steam pipework of this grade respectively; Between each adjacent double-bank heater, be provided with the indirect heater 4 that is connected with said two-stage neighboring heater; Between the bleed steam pipework of each adjacent double-bank heater, be provided be connected with the bleed steam pipework of said adjacent double-bank heater and with this level heater 4 corresponding injecting type heat pumps 2 indirectly, the outlet of described injecting type heat pump 2 links to each other with the inlet of indirect type heater 4.Described each adjacent double-bank heater is defined as heater 1 at the corresponding levels and next stage heater 3; The high pressure nozzle 7 of injecting type heat pump 2 links to each other with heater bleed steam pipework 5 at the corresponding levels; The low-pressure nozzle 8 of injecting type heat pump 2 links to each other with next stage heater bleed steam pipework 6, and the middle pressure nozzle 9 of injecting type heat pump 2 is connected through the indirect heater 4 of pipeline and this level.
Because the injecting type heat pump is widely used in multiple field.High steam expands through high pressure nozzle and forms high velocity air, mixes with low-pressure steam, forms the middle pressure steam of pressure between high steam and low-pressure steam through hybrid chamber 10 backs, its essence is that the kinetic energy that utilizes high steam promotes the pressure of low-pressure steam.Compare with the heat pump of other types, this heat pump is simple in structure, movement-less part, and the course of work is safe and reliable.The present invention is used for large electric power plant unit back heating system with this heat pump, can reduce the irreversible loss of heat recovery process, improves its thermal efficiency.
Adopt the present invention that the improvement project of certain 1000MW supercritical unit heat regenerative system has been carried out preliminary calculating.Consider to utilize the 8th grade of injection that draws gas to draw gas for the 7th grade, the steam pressure of the 8th grade of heater is 8.19MPa under design conditions, and the 7th grade of interior steam pressure of heater is 4.73MPa; When injection than the ratio of low-pressure steam mass flow (high steam with) when being 0.7; Mixed vapour pressure can reach 5.49MPa, and it is about 0.14% that the thermal efficiency of unit can improve, unit generation coa consumption rate decline 0.4g/kWh; Can practice thrift standard coal every year more than 3000 tons, have considerable energy saving and reduce discharging benefit.
The present invention can be widely used in thermal power plant's heat regenerative system, heat supply network heating system, also can be used for the technological process that industries such as oil, chemical industry, metallurgy, light industry need adopt multistage steam to heat.
Claims (2)
1. heat regenerative system that adopts the injecting type heat pump; It is characterized in that: comprise some grades of heaters that link to each other successively; Heaters at different levels link to each other with the bleed steam pipework of this grade respectively; Between each adjacent double-bank heater, be provided with the indirect heater (4) that is connected with said two-stage neighboring heater; Between the bleed steam pipework of each adjacent double-bank heater, be provided be connected with the bleed steam pipework of said adjacent double-bank heater and with this level corresponding injecting type heat pump of heater (4) (2) indirectly, the outlet of described injecting type heat pump (2) links to each other with the inlet of indirect type heater (4).
2. the heat regenerative system of employing injecting type heat pump according to claim 1; It is characterized in that: described each adjacent double-bank heater is defined as heater at the corresponding levels (1) and next stage heater (3); The high pressure nozzle (7) of injecting type heat pump (2) links to each other with heater bleed steam pipework at the corresponding levels (5); The low-pressure nozzle (8) of injecting type heat pump (2) links to each other with next stage heater bleed steam pipework (6), and the middle pressure nozzle (9) of injecting type heat pump (2) is connected through the indirect heater (4) of pipeline and this level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210047719 CN102537935B (en) | 2012-02-28 | 2012-02-28 | Heat regenerative system adopting jet-type heat pumps |
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| CN 201210047719 CN102537935B (en) | 2012-02-28 | 2012-02-28 | Heat regenerative system adopting jet-type heat pumps |
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| CN102537935A true CN102537935A (en) | 2012-07-04 |
| CN102537935B CN102537935B (en) | 2013-08-14 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758657A (en) * | 2012-07-12 | 2012-10-31 | 西安交通大学 | Brown coal pre-drying power generating system integrated with jet heat pump |
| CN103335301A (en) * | 2013-05-17 | 2013-10-02 | 西安交通大学 | Low-load feed-water heating system of thermal power generating unit |
| CN105783080A (en) * | 2016-04-19 | 2016-07-20 | 刘子旺 | Hot-pressing unit heat supply system matched with high-back-pressure heat supply of large air-cooled generator set and regulating method |
| CN105805806A (en) * | 2016-04-19 | 2016-07-27 | 刘子旺 | Hot pressing unit heat supply system based on large air cooling unit and adjusting method thereof |
| CN107559056A (en) * | 2017-08-30 | 2018-01-09 | 联合瑞升（北京）科技有限公司 | A kind of increasing steam turbine system and adjusting method with AGC functions |
| CN109612133A (en) * | 2018-12-31 | 2019-04-12 | 康进科 | A kind of solar water heater and electric heater water system |
| CN109611592A (en) * | 2018-12-31 | 2019-04-12 | 康进科 | A kind of equilibrated valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005091291A (en) * | 2003-09-19 | 2005-04-07 | Toshiba Corp | Super-critical pressure water cooled nuclear power plant |
| JP2006029670A (en) * | 2004-07-15 | 2006-02-02 | Tlv Co Ltd | Condensate recovery device |
| CN100354504C (en) * | 2005-12-28 | 2007-12-12 | 上海电力学院 | Multi-grade using backheating drain residual heat generator of thermal power generator set |
| CN101240909A (en) * | 2008-03-19 | 2008-08-13 | 清华大学 | Steam jet type heat pump heat distribution system for recovering thermal power plant condensing residual heat |
| CN101650022B (en) * | 2009-08-21 | 2011-09-21 | 上海电力学院 | Steam turbine interstage back-heating heater cross-class connecting system |
| CN102235661A (en) * | 2010-04-27 | 2011-11-09 | 王汝武 | Drainage connecting system and method for steam turbine regeneration system |
-
2012
- 2012-02-28 CN CN 201210047719 patent/CN102537935B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005091291A (en) * | 2003-09-19 | 2005-04-07 | Toshiba Corp | Super-critical pressure water cooled nuclear power plant |
| JP2006029670A (en) * | 2004-07-15 | 2006-02-02 | Tlv Co Ltd | Condensate recovery device |
| CN100354504C (en) * | 2005-12-28 | 2007-12-12 | 上海电力学院 | Multi-grade using backheating drain residual heat generator of thermal power generator set |
| CN101240909A (en) * | 2008-03-19 | 2008-08-13 | 清华大学 | Steam jet type heat pump heat distribution system for recovering thermal power plant condensing residual heat |
| CN101650022B (en) * | 2009-08-21 | 2011-09-21 | 上海电力学院 | Steam turbine interstage back-heating heater cross-class connecting system |
| CN102235661A (en) * | 2010-04-27 | 2011-11-09 | 王汝武 | Drainage connecting system and method for steam turbine regeneration system |
Non-Patent Citations (1)
| Title |
|---|
| 王建斌等: "基于超音速激波升压装置的回热系统的热经济性分析", 《节能技术》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758657A (en) * | 2012-07-12 | 2012-10-31 | 西安交通大学 | Brown coal pre-drying power generating system integrated with jet heat pump |
| CN102758657B (en) * | 2012-07-12 | 2014-12-10 | 西安交通大学 | Brown coal pre-drying power generating system integrated with jet heat pump |
| CN103335301A (en) * | 2013-05-17 | 2013-10-02 | 西安交通大学 | Low-load feed-water heating system of thermal power generating unit |
| CN103335301B (en) * | 2013-05-17 | 2014-11-05 | 西安交通大学 | Low-load feed-water heating system of thermal power generating unit |
| CN105783080A (en) * | 2016-04-19 | 2016-07-20 | 刘子旺 | Hot-pressing unit heat supply system matched with high-back-pressure heat supply of large air-cooled generator set and regulating method |
| CN105805806A (en) * | 2016-04-19 | 2016-07-27 | 刘子旺 | Hot pressing unit heat supply system based on large air cooling unit and adjusting method thereof |
| CN105805806B (en) * | 2016-04-19 | 2016-11-23 | 山西爱晟特环保科技有限公司 | A kind of hot pressing unit heating system based on large-scale air cooling unit and control method thereof |
| CN105783080B (en) * | 2016-04-19 | 2016-11-23 | 普瑞森能源科技（北京）股份有限公司 | Large-scale air cooling generator group high back pressure heat supply matched with hot press group heating system and control method |
| CN107559056A (en) * | 2017-08-30 | 2018-01-09 | 联合瑞升（北京）科技有限公司 | A kind of increasing steam turbine system and adjusting method with AGC functions |
| CN107559056B (en) * | 2017-08-30 | 2023-09-08 | 联合瑞升（北京）科技有限公司 | Steam turbine increasing system with AGC function and adjusting method |
| CN109612133A (en) * | 2018-12-31 | 2019-04-12 | 康进科 | A kind of solar water heater and electric heater water system |
| CN109611592A (en) * | 2018-12-31 | 2019-04-12 | 康进科 | A kind of equilibrated valve |
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| CN102537935B (en) | 2013-08-14 |
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