CN104880098A - Condensing type turbo generator set vacuum pump preparation system and operation method thereof - Google Patents
Condensing type turbo generator set vacuum pump preparation system and operation method thereof Download PDFInfo
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- CN104880098A CN104880098A CN201510274929.8A CN201510274929A CN104880098A CN 104880098 A CN104880098 A CN 104880098A CN 201510274929 A CN201510274929 A CN 201510274929A CN 104880098 A CN104880098 A CN 104880098A
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Abstract
The invention discloses a condensing type turbo generator set vacuum pump preparation system. The system comprises a double-backpressure condenser, the double-backpressure condenser comprises a high-backpressure condenser body and a low-backpressure condenser body which are communicated, a steam chamber of the condenser body and a steam chamber of the low-backpressure condenser body are communicated, the high-backpressure condenser body is connected with a vacuum pump A, the low-backpressure condenser body is connected with a vacuum pump C, the vacuum pump A is connected with a vacuum pump B through a pipeline, and the vacuum pump B is in parallel connection between the vacuum pump A and the vacuum pump C; a manually-operated brake valve AB is arranged on a pipeline between the vacuum pump A and the vacuum pump B, and a manually-operated brake valve BC is arranged on a pipeline between the vacuum pump B and the vacuum pump C. An operation method of the system is further disclosed. According to the condensing type turbo generator set vacuum pump preparation system and the operation method thereof, the operation method is flexible, the operation vacuum of the machine set condenser can be effectively improved, the condenser are convenient to switch over between the single backpressure and the double backpressure, and the system operation is safer and more reliable. In the running period of a turbo generator set, the double-backpressure condenser is made to run according to the double-backpressure method, the internal vacuum degree of the double-backpressure condenser is raised, and the purposes of saving the energy and reducing the consumption are achieved.
Description
Technical field
The present invention relates to condensing steam turbine generator group field, be specifically related to provide a kind of condensing steam turbine generator group vavuum pump compounding system and operation method thereof.
Background technology
Recent year electricity needs is vigorous, the sustainable growth of electric coal consumption consumption, but electricity coal supply tightens, and most most of power plant in coal place of production electricity and coal reserve is far below warning line, and even part power plant has been absorbed in and has shut down the awkward condition for the treatment of coal; When energy growing tension fuel price rises steadily, how thermal power plant reduces units consumption seems particular importance, by reducing unit hear rate, could improve the economic benefit of thermal power plant further.
Current condensing steam turbine generator group is typically equipped with vacuum-pumping system, adopts three vavuum pump parallel connections, one or two operations, other two or one for subsequent use.For modern large-size thermal power plant condensing steam turbine generator group, at normal operation period, the noncondensing gas in its double pressure condenser is extracted out primarily of operation vavuum pump, and maintains its inner vacuum.Owing to being the region that communicates in double pressure condenser steam chest, now operation one or two vavuum pumps can meet unit vacuum requirement, but the two back pressure of condenser cannot embody, and lose the energy-saving effect of two back pressure design, cannot obtain better economical operation effect.To this, publication number is that the Chinese invention patent " a kind of double pressure condenser vacuum-pumping system " of CN102967158A improves, it is equipped with orifice union and the shunt valve in parallel with orifice union at high pressure inner ring exhaust tube with on the pipeline of high pressure outer ring exhaust tube, to improve the advantage of double pressure condenser, but its complex structure, circuit switching easily breaks down, and security performance has much room for improvement.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of condensing steam turbine generator group vavuum pump compounding system and operation method thereof.It can effectively improve condenser operating condition, improves condenser inner vacuum, realizes the operating switching undisturbed of the single, double back pressure of condenser simultaneously.
For solving the problems of the technologies described above, the present invention realizes by the following technical solutions:
Condensing steam turbine generator group vavuum pump compounding system, comprise double pressure condenser, described double pressure condenser comprises the high back pressure condenser and low back pressure condenser that communicate in steam chest, described high back pressure condenser connects A vavuum pump, low back pressure condenser connects C vavuum pump, A vavuum pump is connected by pipeline with B vavuum pump, is parallel with B vavuum pump between A vavuum pump and C vavuum pump; And the pipeline between A vavuum pump and B vavuum pump is provided with AB hand sluice valve, the pipeline between B vavuum pump and C vavuum pump is provided with BC hand sluice valve.
The application's being unlike the prior art: on the basis of Yuan Santai vavuum pump parallel connection methods, install AB hand sluice valve additional at A vavuum pump and B vavuum pump connecting pipe place respectively, install BC hand sluice valve additional at B vavuum pump and C vavuum pump connecting pipe place.By selecting different vavuum pumps to run, and open or close different hand sluice valve, realizing the switching of the two back pressure operation method of double pressure condenser list.And then effectively can improve condenser vacuum, improve operational efficiency, reduce units consumption.Native system operation method is flexible, reliable, can realize no-harass switch in the operation of the two back of the body of double pressure condenser list.
Such scheme is preferred, and described A vavuum pump, B vavuum pump are all identical with the capacity preparation of C vavuum pump.
Such scheme is preferred, and described A vavuum pump, B vavuum pump and C vavuum pump correspondence are connected with A pneumatic operated valve, B pneumatic operated valve and C pneumatic operated valve.
The invention also discloses the operation method of condensing steam turbine generator group vavuum pump compounding system, it comprises following operation method:
1) when unit list back pressure operation, start any vavuum pump, other two vavuum pumps are for subsequent use, and AB hand sluice valve and BC hand sluice valve are all opened;
2) when the two back pressure operation of unit, three kinds of operation methods are comprised,
1. AB hand sluice valve is closed, and BC hand sluice valve is opened, and A vavuum pump and B vavuum pump run, and C vavuum pump is for subsequent use, or A vavuum pump and C vavuum pump run, and B vavuum pump is for subsequent use;
2. AB hand sluice valve and BC manual brake are all closed, and A vavuum pump and C vavuum pump run, and B vavuum pump is for subsequent use;
3. AB hand sluice valve is opened, and BC hand sluice valve is closed, and B vavuum pump and C vavuum pump run, and A vavuum pump is for subsequent use, or A vavuum pump and C vavuum pump run, and B vavuum pump is for subsequent use.
Compared with prior art, the present invention has the following advantages:
1, during double pressure condenser list back pressure operation, each vavuum pump puts system layout by first wife, and system does not change, and can run by former method.
2, during the two back pressure operation of double pressure condenser, two vavuum pumps need be started, and select to open hand sluice valve corresponding to operation vavuum pump, each vavuum pump of operation condenser steam chest corresponding to the side is made to carry out vacuumizing operation, reach raising vacuum, and then embody the operational effect of the two back pressure of double pressure condenser.
3, in the two back pressure switchover operation process of double pressure condenser list, only need close or open the hand sluice valve that the vavuum pump of operation side is corresponding, handoff procedure is safe and reliable, can not impact generating set safe operation.
4, operation method of the present invention is flexible, effectively can improve unit condenser and run vacuum, the two back pressure easy switching of double pressure condenser list, and system cloud gray model is more safe and reliable; And at Turbo-generator Set run duration, make double pressure condenser form the operation method of two back pressure, and improve its inner vacuum, realize energy-saving and cost-reducing object.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Number in the figure is: 1, A vavuum pump; 2, B vavuum pump; 3, C vavuum pump; 4, A pneumatic operated valve; 5, B pneumatic operated valve; 6, C pneumatic operated valve; 7, AB hand sluice valve; 8, BC hand sluice valve; 9, high back pressure condenser; 10, low back pressure condenser.
Specific implementation method
A kind of condensing steam turbine generator group of the present invention vavuum pump compounding system, as shown in Figure 1, comprise double pressure condenser, described double pressure condenser comprises the high back pressure condenser 9 and low back pressure condenser 10 that communicate in steam chest, described high back pressure condenser 9 connects A vavuum pump 1, low back pressure condenser 10 is connected C vavuum pump 3, A vavuum pump 1 and is connected by pipeline with B vavuum pump 2, is parallel with B vavuum pump 2 between A vavuum pump 1 and C vavuum pump 3; And the pipeline between A vavuum pump 1 and B vavuum pump 2 is provided with AB hand sluice valve 7, the pipeline between B vavuum pump 2 and C vavuum pump 3 is provided with BC hand sluice valve 8.
In order to make native system more reliable and more stable, described A vavuum pump 1, B vavuum pump 2 are all identical with the capacity preparation of C vavuum pump 3.Certainly, A vavuum pump 1, B vavuum pump 2 and C vavuum pump 3 also can be made up of vavuum pump group respectively.And described A vavuum pump 1, B vavuum pump 2 and C vavuum pump 3 correspondence are connected with A pneumatic operated valve 4, B pneumatic operated valve 5 and C pneumatic operated valve 6.
The present invention also discloses the operation method of condensing steam turbine generator group vavuum pump compounding system, it is divided into single back pressure and two back pressure two kinds of operation methods, introduces the concrete operation method of these two kinds of operation methods below respectively.
The method wherein realizing single back pressure operation method has 3 kinds, and it starts any vavuum pump, and other two vavuum pumps are for subsequent use, and AB hand sluice valve 7 and BC hand sluice valve 8 are all opened, specific as follows:
One, when high back pressure condenser 9 adopts single back pressure A vavuum pump 1 to run with low back pressure side condenser, the A pneumatic operated valve 4 that A vavuum pump 1 exports is opened, B vavuum pump 2, C vavuum pump 3 are stopped transport for subsequent use, the C pneumatic operated valve 6 that the B pneumatic operated valve 5 that B vavuum pump 2 exports, C vavuum pump 3 export cuts out, and AB hand sluice valve 7, BC hand sluice valve 8 are opened.
They are two years old, when high back pressure condenser 9 adopts single back pressure B vavuum pump 2 to run with low back pressure condenser 10, the B pneumatic operated valve 5 that B vavuum pump 2 exports is opened, A vavuum pump 1, C vavuum pump 3 are stopped transport for subsequent use, the C pneumatic operated valve 6 that the A pneumatic operated valve 4 that A vavuum pump 1 exports, C vavuum pump 3 export cuts out, and AB hand sluice valve 7, BC hand sluice valve 8 are opened.
They are three years old, when high back pressure condenser 9 adopts single back pressure C vavuum pump 3 to run with low back pressure condenser 10, the C pneumatic operated valve 6 that C vavuum pump 3 exports is opened, A vavuum pump 1, B vavuum pump 2 are stopped transport for subsequent use, the B pneumatic operated valve 5 that the A pneumatic operated valve 4 that A vavuum pump 1 exports, B vavuum pump 2 export cuts out, and AB hand sluice valve 7, BC hand sluice valve 8 are opened.
The method realizing two back pressure operation method also has 3 kinds, specific as follows:
One, when high back pressure condenser 9 and low back pressure condenser 10 adopt two back pressure A vavuum pump 1 to run with B vavuum pump 2, the B pneumatic operated valve 5 that the A pneumatic operated valve 4 that A vavuum pump 1 exports, B vavuum pump 2 export is opened, C vavuum pump 3 is stopped transport for subsequent use, the C pneumatic operated valve 6 that C vavuum pump 3 exports cuts out, and AB hand sluice valve 7 is closed, and BC hand sluice valve 8 is opened, vacuumized by A vavuum pump 1 pair of high back pressure condenser 9, by B vavuum pump 2, low back pressure condenser 10 is vacuumized.
They are two years old, when high back pressure condenser 9 and low back pressure condenser 10 adopt two back pressure A vavuum pump 1 to run with C vavuum pump 3, the C pneumatic operated valve 6 that the A pneumatic operated valve 4 that A vavuum pump 1 exports, C vavuum pump 3 export is opened, B vavuum pump 2 is stopped transport for subsequent use, the B pneumatic operated valve 5 that B vavuum pump 2 exports cuts out, and AB hand sluice valve 7 is closed, and BC hand sluice valve 8 is closed, vacuumized by A vavuum pump 1 pair of high back pressure condenser 9, by C vavuum pump 3, low back pressure condenser 10 is vacuumized.
They are three years old, when high back pressure condenser 9 and low back pressure condenser 10 adopt two back pressure B vavuum pump 2 to run with C vavuum pump 3, the C pneumatic operated valve 6 that the B pneumatic operated valve 5 that B vavuum pump 2 exports, C vavuum pump 3 export is opened, A vavuum pump 1 is stopped transport for subsequent use, the A pneumatic operated valve 4 that A vavuum pump 1 exports cuts out, and AB hand sluice valve 7 is opened, and BC hand sluice valve 8 is closed, vacuumized by B vavuum pump 2 pairs of high back pressure condensers 9, by C vavuum pump 3, low back pressure condenser 10 is vacuumized.
For the overcritical condensing type thermal power generation unit of certain 600MW, calculate, unit adopts the operation method after optimizing more than 50% during load, i.e. two back pressure operations of double pressure condenser.
Vacuum system distributes front and back operational factor contrast table rationally
As seen from the above table under 50%, 80% and 100% operating mode of generating set rated load, during the more single back pressure operation of two back pressure operations of double pressure condenser, Steam Turbine hear rate declines 20.0kJ/kWh, 32.3kJ/kWh, 34.1kJ/kWh respectively, amounts to standard coal consumption respectively and is about 0.682g/kWh, 1.102g/kWh, 1.16g/kWh.Calculate with this factory's average of the whole year bear 80%, annual total run time 5500 hours, then separate unit 600MW level thermal power generation unit, always saving mark coal amount year is 600MW × 80% × 5500h × 1.102g/kWh=2909.28 ton standard coal, and energy-saving effect is obvious.
More than describe better concrete embodiment of the present invention in detail, be to be understood that.The ordinary skill of this area just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art under this invention's idea, on the basis of existing technology by logic analysis, analyse reasoning or examine the available technical scheme in limited real danger, all should by the determined protection domain of claims.
Claims (4)
1. condensing steam turbine generator group vavuum pump compounding system, it is characterized in that: comprise double pressure condenser, described double pressure condenser comprises the high back pressure condenser (9) and low back pressure condenser (10) that communicate in steam chest, described high back pressure condenser (9) connects A vavuum pump (1), low back pressure condenser (10) connects C vavuum pump (3), A vavuum pump (1) is connected by pipeline with B vavuum pump (2), is parallel with B vavuum pump (2) between A vavuum pump (1) and C vavuum pump (3); And the pipeline between A vavuum pump (1) and B vavuum pump (2) is provided with AB hand sluice valve (7), the pipeline between B vavuum pump (2) and C vavuum pump (3) is provided with BC hand sluice valve (8).
2. condensing steam turbine generator group vavuum pump compounding system according to claim 1, is characterized in that: described A vavuum pump (1), B vavuum pump (2) are prepared all identical with the capacity of C vavuum pump (3).
3. condensing steam turbine generator group vavuum pump compounding system according to claim 1 and 2, is characterized in that: described A vavuum pump (1), B vavuum pump (2) and C vavuum pump (3) correspondence are connected with A pneumatic operated valve (4), B pneumatic operated valve (5) and C pneumatic operated valve (6).
4. the operation method of condensing steam turbine generator group vavuum pump compounding system, is characterized in that, comprises following operation method:
1) when unit list back pressure operation, start any vavuum pump, other two vavuum pumps are for subsequent use, and AB hand sluice valve (7) and BC hand sluice valve (8) are all opened;
2) when the two back pressure operation of unit, three kinds of operation methods are comprised,
1. AB hand sluice valve (7) is closed, BC hand sluice valve (8) is opened, A vavuum pump (1) and B vavuum pump (2) run, C vavuum pump (3) is for subsequent use, or A vavuum pump (1) runs with C vavuum pump (3), B vavuum pump (2) is for subsequent use;
2. AB hand sluice valve (7) and BC manual brake are all closed, and A vavuum pump (1) and C vavuum pump (3) run, and B vavuum pump (2) is for subsequent use;
3. AB hand sluice valve (7) is opened, BC hand sluice valve (8) is closed, B vavuum pump (2) and C vavuum pump (3) run, A vavuum pump (1) is for subsequent use, or A vavuum pump (1) runs with C vavuum pump (3), B vavuum pump (2) is for subsequent use.
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| CN201510274929.8A CN104880098A (en) | 2015-05-26 | 2015-05-26 | Condensing type turbo generator set vacuum pump preparation system and operation method thereof |
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| CN201510274929.8A CN104880098A (en) | 2015-05-26 | 2015-05-26 | Condensing type turbo generator set vacuum pump preparation system and operation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971863A (en) * | 2016-05-03 | 2016-09-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Control method for interlocked starting of standby pumps and condensate pumps in condensed water pumping system |
| 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 |
| CN109539817A (en) * | 2018-12-28 | 2019-03-29 | 贵州电网有限责任公司 | A kind of double back pressure Turbo-generator Set evacuation system for steam condenser and its control method |
| CN111504081A (en) * | 2020-04-08 | 2020-08-07 | 中国电建集团河北省电力勘测设计研究院有限公司 | Many backpressure condenser vacuum pumping system of turbo generator set |
-
2015
- 2015-05-26 CN CN201510274929.8A patent/CN104880098A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971863A (en) * | 2016-05-03 | 2016-09-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Control method for interlocked starting of standby pumps and condensate pumps in condensed water pumping system |
| CN105971863B (en) * | 2016-05-03 | 2017-07-18 | 中国能源建设集团广东省电力设计研究院有限公司 | Condensate pump connection opens the control method of stand-by pump in condensate extraction system |
| 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 |
| CN109539817A (en) * | 2018-12-28 | 2019-03-29 | 贵州电网有限责任公司 | A kind of double back pressure Turbo-generator Set evacuation system for steam condenser and its control method |
| CN111504081A (en) * | 2020-04-08 | 2020-08-07 | 中国电建集团河北省电力勘测设计研究院有限公司 | Many backpressure condenser vacuum pumping system of turbo generator set |
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