CN103090360A - Energy recovery method of thermal power plant heat regenerative system - Google Patents
Energy recovery method of thermal power plant heat regenerative system Download PDFInfo
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- CN103090360A CN103090360A CN2011103409952A CN201110340995A CN103090360A CN 103090360 A CN103090360 A CN 103090360A CN 2011103409952 A CN2011103409952 A CN 2011103409952A CN 201110340995 A CN201110340995 A CN 201110340995A CN 103090360 A CN103090360 A CN 103090360A
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Abstract
The invention discloses an energy recovery method of a thermal power plant heat regenerative system. The heat regenerative system comprises a high-pressure heater, a low-pressure heater, a heat exchanger, a jet pump, an adjusting valve and the like. A drain pipe of the high-pressure heater is connected with a high-pressure fluid inlet of the jet pump through the adjusting valve. A drain pipe of the low-pressure heater is connected with a low-pressure fluid inlet of the jet pump. An outlet of the jet pump is connected with a water inlet pipe of a deaerator through a pipeline. The heat exchanger is mounted on the drain pipe of the high-pressure heater and used for cooling high-pressure drain water.
Description
Technical field
The present invention relates to the energy reclaiming method of a kind of thermal power plant heat regenerative system.
Background technology
In large-size thermal power plant, in order to improve system effectiveness, the general method that all adopts multistage backheat, namely repeatedly extract part steam in steam turbine, by a plurality of heat exchangers with the thermal release of steam to boiler feedwater, thereby improve gradually the temperature of feedwater, finally improve the cycle efficieny in thermal power plant.To condense into water after the Steam Heating feedwater, adopt the mode of gravity flow step by step finally to enter in boiler feedwater, according to present design, the condensate water that No. 1 high-pressure heater condensate water of heat regenerative system will flow into No. 2 high-pressure heaters, No. 2 high-pressure heaters will flow into high-pressure heater No. 3, and the condensate water of No. 3 high-pressure heaters will flow into oxygen-eliminating device.Same, the condensate water of No. 5, No. 6 low-pressure heaters is also followed same rule, finally flows into the hot well of turbine condenser together with the condensate water of No. 7 and No. 8 low-pressure heaters.The condensate water of hot well the inside is pressurizeed by condensate pump, enters oxygen-eliminating device after No. 8, No. 7, No. 6, No. 5 low-pressure heaters of flowing through successively, and then enters boiler economizer through No. 3, No. 2, No. 1 high-pressure heater of flowing through successively after the feed pump pressurization.
Although this system can carry out the heat that draws gas to utilize fully, but but do not have to take full advantage of the pressure energy that draws gas, thermal power generation unit for 600MW, 1 grade of pressure that draws gas is generally in the 6MPa left and right, namely the condensate water pressure of No. 1 high-pressure heater is also in about 6MPa, but the pressure of oxygen-eliminating device but only has 0.7～0.9MPa, therefore, present gravity flow mode step by step can not fully utilize the pressure energy of condensate water, but has wasted.
Summary of the invention
For the deficiency that prior art exists, the present invention aims to provide a kind of method that can reclaim heat regenerative system condensate water pressure energy.
The technical solution used in the present invention is:
The energy reclaiming method of a kind of thermal power plant heat regenerative system comprises high-pressure heater, low-pressure heater, heat exchanger, jet pump and control valve etc.The drain water piping of high-pressure heater is connected with the high-pressure fluid entrance of jet pump by control valve, the drain water piping of low-pressure heater is connected with the low-pressure fluid entrance of jet pump by control valve, and the injection delivery side of pump is connected with the oxygen-eliminating device water inlet pipe by pipeline.Heat exchanger also is installed with cooling high pressure draining on the drain water piping of high-pressure heater.Jet pump also can adopt adjustable jet pump, and can uneasy fill control valve on the high-pressure heater drain water piping this moment.
The present invention is simple in structure, invests very littlely, can improve the power supplying efficiency of power plant.
Description of drawings
Accompanying drawing is implementation system figure of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Description of reference numerals is as follows:
1---high-pressure heater 2---high steam pipeline
3---feed pump 4---oxygen-eliminating device jet chimney
5---oxygen-eliminating device 6---jet pump
7,14,19---pipeline 8---oxygen-eliminating device water inlet pipe
9---low-pressure steam pipeline 10---low-pressure heater
11--- condensate pump 12,16,20---drain water piping
13--- heat exchanger 15,17,18---control valve
In embodiment as shown in the figure, drain water piping 12 at high-pressure heater 1 is connected with the medium that is cooled of heat exchanger 13, heat exchanger 13 media outlet that is cooled is connected with drain water piping 16, the other end of drain water piping 16 is connected with the high-pressure fluid entrance of jet pump 6, in order to regulate the high pressure draining flow, control valve 15 has been installed also on drain water piping 16.The low-pressure fluid entrance of jet pump 6 is connected with low-pressure heater 10 by drain water piping 20, and is same, hydrophobic in order to regulate low pressure, and control valve 18 is installed on drain water piping 20.The outlet of jet pump 6 is connected with oxygen-eliminating device inlet channel 8 by pipeline 7.The import of heat exchanger 13 cooling waters is connected by the outlet of pipeline 19 with condensate pump 11, and the outlet of heat exchanger 13 cooling waters is connected with oxygen-eliminating device water inlet pipe 8 by pipeline 14.In order to regulate the flow of cooling water, control valve 17 is installed on pipeline 19.
Like this, high steam is in high-pressure heater 1 in condensation, the high pressure draining that produces enters in jet pump 6 through after heat exchanger 13 cooling, the ejector action that produces by high pressure draining, the interior low pressure that produces of low-pressure heater 10 is hydrophobic will be flowed in the mixing chamber of jet pump 6, mix by piping 7 entering in oxygen-eliminating device water inlet pipe 8 with high pressure draining, finally flow in oxygen-eliminating device 5.The cooling water of heat exchanger 13 comes from the condensate water of condensate pump 11 outlets, finally also will flow in oxygen-eliminating device 5.High pressure draining, low pressure is hydrophobic and the flow of cooling water relies on control valve 15,18 and 17 to regulate.If can adopt adjustable jet pump 6, control valve 15 can be installed so.
Because in low-pressure heater 10 produces the hydrophobic hot well that does not flow back into condenser, so the flow of condensate pump 11 greatly reduces, therefore also just reduced the power of motor of condensate pump 11, thereby saved the power consumption of power plant.
Because the high-pressure heater 1 in thermal power plant and the quantity of low-pressure heater 10 are not 1, so can according to the parameter request of jet pump 6, make up according to method provided by the present invention between them.So the present invention is not limited to above-mentioned preferred forms, anyone can draw other various forms of products under enlightenment of the present invention.Though but do any variation on its shape or structure, every or akin technical scheme identical with the present invention is all within its protection domain.
Claims (2)
1. the energy reclaiming method of a thermal power plant heat regenerative system, is characterized in that, comprises high-pressure heater, low-pressure heater, heat exchanger, jet pump and control valve etc.The drain water piping of high-pressure heater is connected with the high-pressure fluid entrance of jet pump by control valve, the drain water piping of low-pressure heater is connected with the low-pressure fluid entrance of jet pump by control valve, and the injection delivery side of pump is connected with the oxygen-eliminating device water inlet pipe by pipeline.Heat exchanger also is installed with cooling high pressure draining on the hydrophobic pipeline of high-pressure heater.
2. thermal power plant according to claim 1 heat regenerative system energy reclaiming method, jet pump can adopt adjustable jet pump, can uneasy dress control valve on this moment high-pressure heater drain water piping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103409952A CN103090360A (en) | 2011-11-02 | 2011-11-02 | Energy recovery method of thermal power plant heat regenerative system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103409952A CN103090360A (en) | 2011-11-02 | 2011-11-02 | Energy recovery method of thermal power plant heat regenerative system |
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| CN103090360A true CN103090360A (en) | 2013-05-08 |
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| CN2011103409952A Pending CN103090360A (en) | 2011-11-02 | 2011-11-02 | Energy recovery method of thermal power plant heat regenerative system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976608A (en) * | 2015-06-17 | 2015-10-14 | 大唐(北京)能源管理有限公司 | Exhaust smoke waste heat recycling system for drain water heating thermal power plant boiler |
| CN107166368A (en) * | 2017-05-26 | 2017-09-15 | 国网山东省电力公司电力科学研究院 | A kind of low-pressure heater steam trap connection |
Citations (5)
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| JPS61138808A (en) * | 1984-12-12 | 1986-06-26 | Hitachi Ltd | Anticorrosive device for thermal power plant |
| CN101650022A (en) * | 2009-08-21 | 2010-02-17 | 上海电力学院 | Steam turbine interstage back-heating heater cross-class connecting system |
| CN201412830Y (en) * | 2009-05-04 | 2010-02-24 | 中冶赛迪工程技术股份有限公司 | Water supply system for boilers |
| CN201652319U (en) * | 2010-04-27 | 2010-11-24 | 王汝武 | Drainage connection system for steam turbine regenerative system |
| RU2496992C1 (en) * | 2012-07-27 | 2013-10-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") | Method of operation of thermal power plant |
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2011
- 2011-11-02 CN CN2011103409952A patent/CN103090360A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61138808A (en) * | 1984-12-12 | 1986-06-26 | Hitachi Ltd | Anticorrosive device for thermal power plant |
| CN201412830Y (en) * | 2009-05-04 | 2010-02-24 | 中冶赛迪工程技术股份有限公司 | Water supply system for boilers |
| CN101650022A (en) * | 2009-08-21 | 2010-02-17 | 上海电力学院 | Steam turbine interstage back-heating heater cross-class connecting system |
| CN201652319U (en) * | 2010-04-27 | 2010-11-24 | 王汝武 | Drainage connection system for steam turbine regenerative system |
| RU2496992C1 (en) * | 2012-07-27 | 2013-10-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") | Method of operation of thermal power plant |
Non-Patent Citations (1)
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| 杨琳等: "引射式加热器替代低压回热系统等效焓降分析", 《重庆大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976608A (en) * | 2015-06-17 | 2015-10-14 | 大唐(北京)能源管理有限公司 | Exhaust smoke waste heat recycling system for drain water heating thermal power plant boiler |
| CN104976608B (en) * | 2015-06-17 | 2018-02-16 | 大唐(北京)能源管理有限公司 | It is a kind of to heat hydrophobic power plant boiler smoke waste heat recovery system |
| CN107166368A (en) * | 2017-05-26 | 2017-09-15 | 国网山东省电力公司电力科学研究院 | A kind of low-pressure heater steam trap connection |
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Application publication date: 20130508 |