CN201740417U - Multi-backpressure condenser evacuating device - Google Patents
Multi-backpressure condenser evacuating device Download PDFInfo
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- CN201740417U CN201740417U CN2010205097161U CN201020509716U CN201740417U CN 201740417 U CN201740417 U CN 201740417U CN 2010205097161 U CN2010205097161 U CN 2010205097161U CN 201020509716 U CN201020509716 U CN 201020509716U CN 201740417 U CN201740417 U CN 201740417U
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Abstract
The utility model relates to a multi-backpressure condenser evacuating device in a steam turbine unit, which solves the problems that the operational safety of the machine unit of the current double-backpressure condenser is reduced, the economical efficiency of the machine unit cannot maintain the optimum state, and the load distribution among the vacuum pumps is inflexible. The multi-backpressure condenser evacuating device comprises a low pressure condenser, a high pressure condenser, three vacuum pumps, a low pressure condenser pumping pipeline, a high pressure condenser pumping pipeline, a first adjusting valve, a pumping main pipe and a motor 1, wherein the low pressure condenser and the high pressure condenser are connected with one end of the pumping main pipe respectively through the low pressure condenser pumping pipeline and the high pressure condenser pumping pipeline, the three vacuum pumps are connected with the other end of the pumping main pipe, the first adjusting valve is arranged in the high pressure condenser pumping pipeline, and is integrally connected with the motor. The multi-backpressure condenser evacuating device is applicable to power plants.
Description
Technical field
The present invention relates to the multipressure condenser vacuum extractor in a kind of Steam Turbine.
Background technology
Condenser is one of most important heat transmission equipment of thermal power plant, back pressure of condenser is the parameter that the Steam Turbine performance driving economy is had material impact, multi-pressure condenser has the Steam Turbine of reduction heat consumption rate, reduces film-cooled heat and cooling water inflow, improve advantages such as condenser layout, the back pressure value of each condenser is under conditions such as given Steam Turbine thermodynamic property, circulating water temperature, quantity of circulating water, heat-exchange system, relatively determines by Technological Economy.To the actual unit that puts into operation, the best back pressure value of each condenser also is to change at any time along with factor such as unit load, circulating water temperature and the water yield, condenser clean-up performance, and best back pressure value will be calculated just by the associated hot force parameter to steam turbine and condenser and can draw.In addition, the condenser of present most units is two back pressure designs, steam bleeding system is high pressure condenser 2, the bleed steam pipework of low pressure condenser 1 is together in parallel by same female Guan Yusan vavuum pump 8 in parallel be connected (referring to Fig. 1), all pressures effect of female pipe can make the extraction steam pipe resistance of high pressure condenser 2 and low pressure condenser 1 be tending towards equal, reason owing to the condenser pressure difference, the bleed steam pipework amount of drawing gas that must be high pressure condenser 2 increases, the bleed steam pipework amount of drawing gas of low pressure condenser 1 is limited, article two, the bleed steam pipework resistance reaches a poised state, therefore, at vacuum tightness preferably under the situation, the pressure of high pressure condenser 2 and low pressure condenser 1 can be basic identical, its pressure approaches the pressure of high pressure condenser 2, the two back pressure operations that can't realize ideal.For addressing this problem, part of generating units is connected (referring to Fig. 2) with the exhaust pipeline of high pressure condenser 2 and low pressure condenser 1 respectively with vavuum pump 8, though realize two back pressure operations of unit like this, but have following three problems: one, the security of unit operation descends, general three vavuum pumps of the above machine assembly of 600MW, the operation of 1-2 platform vavuum pump, all the other are standby, when a vavuum pump is connected with a condenser, when the vacuum failure of pump, there is not stand-by pump, expansion easily causes the accident; Two, the economy of unit can not keep optimum state, when circulating water temperature is low, and the low pressure condenser vacuum that can overstep the extreme limit, the high pressure condenser vacuum is on the low side, makes both sides all can not move under optimum vacuum.Three, the sharing of load between the vavuum pump is dumb, and the corresponding condenser of vavuum pump when the vacuum power that pumps descends or a certain side condenser vacuum tightness when relatively poor, can't be transferred to load other vavuum pump, also can cause the rising of condenser pressure.
Summary of the invention
The objective of the invention is to descend for the security that solves unit operation in the existing double pressure condenser, the economy of unit can not keep the inflexible problem of the sharing of load between optimum state and the vavuum pump, and then
A kind of multipressure condenser vacuum extractor is provided.
Technical scheme of the present invention is: it comprises low pressure condenser 1, high pressure condenser 2 and vavuum pump group A, described vavuum pump group A is by at least three vavuum pump parallel connections, it also comprises low pressure condenser pump-line 3, high pressure condenser pump-line 4, first control valve 5, bleed female pipe 7 and motor 1, described low pressure condenser 1 is by low pressure condenser pump-line 3, high pressure condenser 2 is connected an end of female pipe 7 of bleeding by high pressure condenser pump-line 4, vavuum pump group A is connected the other end of female pipe 7 of bleeding, described high pressure condenser pump-line 4 is provided with first control valve 5, and described first control valve 5 is connected with motor 1.
The present invention has following beneficial effect: be connected with the vavuum pump group after each condenser parallel connection of the present invention, when a vavuum pump breaks down, unlatching by control valve normally moves condenser, and vavuum pump has been realized standby to each condenser, has improved the security that vacuumizes vacuum extractor.Simultaneously,, also can reduce the thermic load of vavuum pump, reduce vavuum pump sealing water temperature, improve vavuum pump and exert oneself owing to extract the minimizing of water vapour amount.According to the operation platform number of total rate of air sucked in required decision vavuum pump, but the load flexible allocation of bleeding is given each vavuum pump, and has eliminated vacuum-pumping pipeline mother and managed all pressure effects to the influence of condenser pressure.
Description of drawings
Fig. 1 is the structural representation that is connected with the vavuum pump group after the parallel connection of high and low pressure condenser in the existing Steam Turbine; Fig. 2 is the structural representation that high and low pressure condenser vacuum pump connects respectively in the existing Steam Turbine; Fig. 3 is the structural representation (being the vavuum pump group among the figure in the frame of broken lines) of the specific embodiment of the invention one; Fig. 4 is the structural representation of the specific embodiment of the present invention two.
The specific embodiment
The specific embodiment one: the multipressure condenser vacuum extractor that present embodiment is described in conjunction with Fig. 3, it comprises low pressure condenser 1, high pressure condenser 2 and vavuum pump group A, described vavuum pump group A is by at least three vavuum pump parallel connections, it also comprises low pressure condenser pump-line 3, high pressure condenser pump-line 4, first control valve 5, bleed female pipe 7 and motor 1, described low pressure condenser 1 is by low pressure condenser pump-line 3, high pressure condenser 2 is connected an end of female pipe 7 of bleeding by high pressure condenser pump-line 4, vavuum pump group A is connected the other end of female pipe 7 of bleeding, described high pressure condenser pump-line 4 is provided with first control valve 5, and described first control valve 5 is connected with motor 1.Read Steam Turbine and each relevant parameter of condenser by thermal technology's control system 6 during vacuum extractor work, and go out the best back pressure that low pressure condenser 1 and high pressure condenser 2 can be realized by these calculation of parameter, and according to promptly there being the back pressure of condenser difference to send instructions to control valve, back pressure is adjusted, the back pressure that makes two condensers near or reach to the best back pressure of calculating, thereby improve the economy of Steam Turbine operation.
The specific embodiment two: the multipressure condenser vacuum extractor that present embodiment is described in conjunction with Fig. 4, it also comprises sub-high pressure condenser 9, sub-high pressure condenser pump-line 10, second control valve 11 and motor 2 12, described sub-high pressure condenser 9 is arranged between low pressure condenser 1 and the high pressure condenser 2, sub-high pressure condenser 9 is connected on the high pressure condenser pump-line 4 by sub-high pressure condenser pump-line 10, and the link of sub-high pressure condenser pump-line 10 is between the low pressure condenser pump-line 3 and first control valve 5, described sub-high pressure condenser pump-line 10 is provided with second control valve 11, and described second control valve 11 is connected with motor 2 12.The aperture of controlling first control valve 5 and second control valve 11 by thermal technology's control device 6 is regulated the pressure of three condensers.Other compositions of present embodiment are identical with the specific embodiment one with annexation.
Operation principle: first control valve 5 and second control valve 11 are installed respectively on high pressure condenser exhaust pipe 4 and sub-high pressure condenser pump-line 10, first control valve 5 and second control valve 11 are controlled by thermal technology's control system, thermal technology's control system 6 reads the relevant parameter of Steam Turbine and condenser in good time, calculate the best back pressure of each condenser, by the control and regulation valve each back pressure of condenser is adjusted to optimum value again, thereby realize the real-time adjustment of multipressure condenser back pressure, thermal technology's control system can directly realize in the DCS of generating set, generally adopt independently control appliances such as industrial control computer in actual applications, accurately, in time calculate the optimum value of unit back pressure.
Claims (2)
1. multipressure condenser vacuum extractor, it comprises low pressure condenser (1), high pressure condenser (2) and vavuum pump group (A), described vavuum pump group (A) is by at least three vavuum pump parallel connections, it is characterized in that: it also comprises low pressure condenser pump-line (3), high pressure condenser pump-line (4), first control valve (5), the mother that bleeds manages (7) and motor one (13), described low pressure condenser (1) is by low pressure condenser pump-line (3), high pressure condenser (2) is connected an end of the female pipe (7) of bleeding by high pressure condenser pump-line (4), vavuum pump group (A) is connected the other end of the female pipe (7) of bleeding, described high pressure condenser pump-line (4) is provided with first control valve (5), and described first control valve (5) is connected with motor one (13).
2. multipressure condenser vacuum extractor according to claim 1, it is characterized in that: it also comprises sub-high pressure condenser (9), sub-high pressure condenser pump-line (10), second control valve (11) and motor two (12), described sub-high pressure condenser (9) is arranged between low pressure condenser (1) and the high pressure condenser (2), sub-high pressure condenser (9) is connected on the high pressure condenser pump-line (4) by sub-high pressure condenser pump-line (10), and the link of sub-high pressure condenser pump-line (10) is positioned between low pressure condenser pump-line (3) and first control valve (5), described sub-high pressure condenser pump-line (10) is provided with second control valve (11), and described second control valve (11) is connected with motor two (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205097161U CN201740417U (en) | 2010-08-30 | 2010-08-30 | Multi-backpressure condenser evacuating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205097161U CN201740417U (en) | 2010-08-30 | 2010-08-30 | Multi-backpressure condenser evacuating device |
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| CN201740417U true CN201740417U (en) | 2011-02-09 |
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| CN2010205097161U Expired - Fee Related CN201740417U (en) | 2010-08-30 | 2010-08-30 | Multi-backpressure condenser evacuating device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927833A (en) * | 2012-11-27 | 2013-02-13 | 中国能源建设集团广东省电力设计研究院 | Condenser water box vacuum-pumping system and vacuum suction method |
| CN102967158A (en) * | 2012-12-13 | 2013-03-13 | 华电电力科学研究院 | Vacuum pumping system of double-backpressure condenser |
| CN106323033A (en) * | 2016-08-18 | 2017-01-11 | 华能国际电力股份有限公司 | Effective pressure difference adjustment method for double backpressure condensers |
| CN107062931A (en) * | 2017-02-15 | 2017-08-18 | 北京中电云汇技术有限公司 | A kind of drag compensation formula Air-Cooling Island system |
| CN107421350A (en) * | 2017-07-18 | 2017-12-01 | 西安西热节能技术有限公司 | A kind of double pressure condenser takes out air SR matching intelligent adjusting method |
| CN107606966A (en) * | 2017-11-23 | 2018-01-19 | 长兴华阁耐物流装备有限公司 | A kind of condenser is classified vaccum-pumping equipment |
| CN112983579A (en) * | 2021-03-09 | 2021-06-18 | 西安交通大学 | Cold end system of thermal power plant and efficiency optimization method thereof |
-
2010
- 2010-08-30 CN CN2010205097161U patent/CN201740417U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927833A (en) * | 2012-11-27 | 2013-02-13 | 中国能源建设集团广东省电力设计研究院 | Condenser water box vacuum-pumping system and vacuum suction method |
| CN102967158A (en) * | 2012-12-13 | 2013-03-13 | 华电电力科学研究院 | Vacuum pumping system of double-backpressure condenser |
| CN106323033A (en) * | 2016-08-18 | 2017-01-11 | 华能国际电力股份有限公司 | Effective pressure difference adjustment method for double backpressure condensers |
| CN107062931A (en) * | 2017-02-15 | 2017-08-18 | 北京中电云汇技术有限公司 | A kind of drag compensation formula Air-Cooling Island system |
| CN107421350A (en) * | 2017-07-18 | 2017-12-01 | 西安西热节能技术有限公司 | A kind of double pressure condenser takes out air SR matching intelligent adjusting method |
| CN107606966A (en) * | 2017-11-23 | 2018-01-19 | 长兴华阁耐物流装备有限公司 | A kind of condenser is classified vaccum-pumping equipment |
| CN112983579A (en) * | 2021-03-09 | 2021-06-18 | 西安交通大学 | Cold end system of thermal power plant and efficiency optimization method thereof |
| CN112983579B (en) * | 2021-03-09 | 2022-06-07 | 西安交通大学 | Cold end system of thermal power plant and efficiency optimization method thereof |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20130830 |