CN102967158A - Vacuum pumping system of double-backpressure condenser - Google Patents
Vacuum pumping system of double-backpressure condenser Download PDFInfo
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- CN102967158A CN102967158A CN2012105411275A CN201210541127A CN102967158A CN 102967158 A CN102967158 A CN 102967158A CN 2012105411275 A CN2012105411275 A CN 2012105411275A CN 201210541127 A CN201210541127 A CN 201210541127A CN 102967158 A CN102967158 A CN 102967158A
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Abstract
The invention provides a vacuum pumping system of a double-backpressure condenser, which comprises a high backpressure condenser, a low backpressure condenser and a vacuum pump group, wherein a high-pressure inner ring suction pipe and a high-pressure outer ring suction pipe are respectively arranged at an inner ring and an outer ring of the high backpressure condenser; a low-pressure inner ring suction pipe and a low-pressure outer ring suction pipe are respectively arranged at an inner ring and an outer ring of the low backpressure condenser; the high-pressure inner ring suction pipe and the low-pressure inner ring suction pipe are converged to form an inner ring suction pipe; the high-pressure outer ring suction pipe and the low-pressure outer ring suction pipe are converged to form an outer ring suction pipe; the outer ring suction pipe and the inner ring suction pipe are converged to form a master pipe; the master pipe is connected with an inlet of the vacuum pump group; and the pipelines of the high-pressure inner ring suction pipe and the high-pressure outer ring suction pipe are both provided with orifice unions and bypass pipes connected with the orifice unions in parallel. The vacuum pumping system has the advantages of high safety, low modification cost, small modification workload, low modification risk, and achievement to the purpose of reducing vacuum of the low-pressure condenser.
Description
Technical field
The present invention relates to vacuum-pumping system, refer to especially a kind of double pressure condenser vacuum-pumping system.
Background technology
Condenser is as the visual plant in the condensing type thermal power generation unit s cold end system, the quality of its performance directly affects the economy of unit, wherein in the condenser not gathering of condensable gas can produce very adverse influence to Performance of Condensers, so the condenser vacuum extract system has played vital effect to keeping good Performance of Condensers.Along with the maximization of generating set single-machine capacity, its condenser majority of 600MW and above unit adopts double pressure condensers at present.Double pressure condenser has the following advantages: because double pressure condenser under identical circulating water temperature, flow, can obtain the average reduced pressure lower than single-pressure condenser, adopt double pressure condenser to have preferably economy; The condensate water that double pressure condenser is lower with the low-pressure side temperature is introduced the high-pressure side and is carried out post bake, so condensate undercooling is less than single back pressure condenser, has improved turbine thermodynamic efficiency.Yet because the design defect of condenser vacuum exhaust pipe, high and low back pressure vacuum suction pipeline is adopted arranged in series, namely draw exhaust pipe from the high pressure condenser first and enter the low pressure condenser, draw exhaust pipe from the low pressure condenser again and connect the vavuum pump group, so design can produce the problem of high and low back pressure condenser vacuum pressure reduction deficiency, reduce the advantage of double pressure condenser, reduced the unit operation economy.
Summary of the invention
The present invention proposes a kind of double pressure condenser vacuum-pumping system, has solved the problem that can produce high and low back pressure condenser vacuum pressure reduction deficiency in the prior art, has reduced the advantage of double pressure condenser, has reduced the shortcoming of unit operation economy.
Technical scheme of the present invention is achieved in that
A kind of double pressure condenser vacuum-pumping system, comprise the high back pressure condenser, low back pressure condenser, the vavuum pump group, in the described high back pressure condenser, the outer ring is respectively equipped with high pressure inner ring exhaust tube, high pressure outer ring exhaust tube, in the described low back pressure condenser, the outer ring is respectively equipped with low pressure inner ring exhaust tube, low pressure outer ring exhaust tube, described high pressure inner ring exhaust tube and low pressure inner ring exhaust tube merge into the inner ring exhaust tube, described high pressure outer ring exhaust tube and low pressure outer ring exhaust tube merge into the outer ring exhaust tube, described outer ring exhaust tube and inner ring exhaust tube merge into female pipe, this mother's pipe links to each other with the entrance of vavuum pump group, it is characterized in that, be equipped with orifice union and the shunt valve in parallel with orifice union on the pipeline of described high pressure inner ring exhaust tube and high pressure outer ring exhaust tube.
Described orifice union is restricting orifice or manually operated door or Electrically operated gate or steam-operating door.
Described shunt valve is provided with the shunt valve valve.
Described shunt valve valve is manually operated door or bypass Electrically operated gate or bypass steam-operating door.
Described vavuum pump group is comprised of two or more vavuum pumps.
Compared with prior art, advantage of the present invention comprises: safe, improvement expenses is low, and the retrofit work amount is little, and it is little, safe to transform risk, substantially can reach to reduce low pressure condenser vacuum purpose.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of a kind of double pressure condenser vacuum-pumping system of the present invention.
Wherein, the low back pressure condenser of 1-, 2-high back pressure condenser, 3-outer ring shunt valve valve, 4-inner ring shunt valve valve, 5-inner ring orifice union, 6-outer ring orifice union, 7-outer ring shunt valve, 8-inner ring shunt valve, 9-high pressure outer ring exhaust tube, 10-high pressure inner ring exhaust tube, 11-outer ring exhaust tube valve, 12-inner ring exhaust tube valve, the female pipe of 13-, 14-the first vacuum valve valve, 15-the second vacuum valve valve, 16-the 3rd vacuum valve valve
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
As shown in Figure 1, a kind of double pressure condenser vacuum-pumping system, comprise high back pressure condenser 2, low back pressure condenser 1, the vavuum pump group, in the described high back pressure condenser 2, the outer ring is respectively equipped with high pressure inner ring exhaust tube 10, high pressure outer ring exhaust tube 9, in the described low back pressure condenser 1, the outer ring is respectively equipped with low pressure inner ring exhaust tube, low pressure outer ring exhaust tube, described high pressure inner ring exhaust tube 10 merges into the inner ring exhaust tube with low pressure inner ring exhaust tube, described high pressure outer ring exhaust tube 9 merges into the outer ring exhaust tube with low pressure outer ring exhaust tube, described outer ring exhaust tube and inner ring exhaust tube merge into female pipe, this mother's pipe links to each other with the entrance of vavuum pump group, is equipped with orifice union (5 on the pipeline of described high pressure inner ring exhaust tube 10 and high pressure outer ring exhaust tube 9,6) reach the shunt valve (8 in parallel with orifice union, 7).Described orifice union (5,6) is restricting orifice or manually operated door or Electrically operated gate or steam-operating door.Described shunt valve (8,7) is provided with shunt valve valve (4,3).Described shunt valve valve (4,3) is manually operated door or bypass Electrically operated gate or bypass steam-operating door.Described vavuum pump group is comprised of two or more vavuum pumps.
High pressure inner ring exhaust tube 10, high pressure outer ring exhaust tube 9 is in high back pressure condenser 2, draw the gas area of finding time, outer ring, through orifice union (5,6) enter low back pressure condenser 1 after, respectively with the low pressure inner ring exhaust tube of low back pressure condenser 1, low pressure outer ring exhaust tube converges, draw from low back pressure condenser 1 influent side, each is through outer ring exhaust tube valve 11, be aggregated into the female pipe 13 of exhaust behind the inner ring exhaust tube valve 12, link to each other with the vacuum pump inlet that three vavuum pumps form respectively, these three vavuum pumps are respectively equipped with the first vacuum valve valve 14, the second vacuum valve valve 15, the 3rd vacuum valve valve 16, orifice union (5,6) can be contracted to high pressure inner ring exhaust tube 10,1/3 Φ of high pressure outer ring exhaust tube 9 calibers.By adjusting outer ring shunt valve valve 3, inner ring shunt valve valve 4 sizes, guarantee that height back pressure back pressure of condenser reaches design load.
The vavuum pump group that three above-mentioned vavuum pumps form also can form the vavuum pump group by two vavuum pumps.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. double pressure condenser vacuum-pumping system, comprise the high back pressure condenser, low back pressure condenser, the vavuum pump group, in the described high back pressure condenser, the outer ring is respectively equipped with high pressure inner ring exhaust tube, high pressure outer ring exhaust tube, in the described low back pressure condenser, the outer ring is respectively equipped with low pressure inner ring exhaust tube, low pressure outer ring exhaust tube, described high pressure inner ring exhaust tube and low pressure inner ring exhaust tube merge into the inner ring exhaust tube, described high pressure outer ring exhaust tube and low pressure outer ring exhaust tube merge into the outer ring exhaust tube, described outer ring exhaust tube and inner ring exhaust tube merge into female pipe, this mother's pipe links to each other with the entrance of vavuum pump group, it is characterized in that, be equipped with orifice union and the shunt valve in parallel with orifice union on the pipeline of described high pressure inner ring exhaust tube and high pressure outer ring exhaust tube.
2. a kind of double pressure condenser vacuum-pumping system according to claim 1 is characterized in that, described orifice union is restricting orifice or manually operated door or Electrically operated gate or steam-operating door.
3. a kind of double pressure condenser vacuum-pumping system according to claim 1 is characterized in that described shunt valve is provided with the shunt valve valve.
4. a kind of double pressure condenser vacuum-pumping system according to claim 3 is characterized in that, described shunt valve valve is manually operated door or bypass Electrically operated gate or bypass steam-operating door.
5. a kind of double pressure condenser vacuum-pumping system according to claim 1 is characterized in that, described vavuum pump group is comprised of two or more vavuum pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105411275A CN102967158A (en) | 2012-12-13 | 2012-12-13 | Vacuum pumping system of double-backpressure condenser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105411275A CN102967158A (en) | 2012-12-13 | 2012-12-13 | Vacuum pumping system of double-backpressure condenser |
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| CN102967158A true CN102967158A (en) | 2013-03-13 |
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| CN2012105411275A Pending CN102967158A (en) | 2012-12-13 | 2012-12-13 | Vacuum pumping system of double-backpressure condenser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499222A (en) * | 2013-09-09 | 2014-01-08 | 广东电网公司电力科学研究院 | Jet type air-bleed system of dual-pressure condenser |
| CN105865220A (en) * | 2016-05-26 | 2016-08-17 | 中国大唐集团科学技术研究院有限公司华东分公司 | Double backpressure condenser optimized operation device and operation method thereof |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57196085A (en) * | 1981-05-28 | 1982-12-01 | Fuji Electric Co Ltd | Multi-stage pressure type condenser |
| JPH10288693A (en) * | 1997-04-14 | 1998-10-27 | Hitachi Ltd | Purifier of condenser and its operation method |
| CN201724571U (en) * | 2010-06-08 | 2011-01-26 | 曾华 | Vacuumizing system of dual pressure condenser |
| CN201740417U (en) * | 2010-08-30 | 2011-02-09 | 魏熙臣 | Multi-backpressure condenser evacuating device |
| CN202938660U (en) * | 2012-11-26 | 2013-05-15 | 华电电力科学研究院 | 600MW subcritical thermal power generating unit double-back-pressure condenser vacuum pumping system |
| CN202973947U (en) * | 2012-12-13 | 2013-06-05 | 华电电力科学研究院 | Double-backpressure-condenser vacuum air exhausting system |
-
2012
- 2012-12-13 CN CN2012105411275A patent/CN102967158A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57196085A (en) * | 1981-05-28 | 1982-12-01 | Fuji Electric Co Ltd | Multi-stage pressure type condenser |
| JPH10288693A (en) * | 1997-04-14 | 1998-10-27 | Hitachi Ltd | Purifier of condenser and its operation method |
| CN201724571U (en) * | 2010-06-08 | 2011-01-26 | 曾华 | Vacuumizing system of dual pressure condenser |
| CN201740417U (en) * | 2010-08-30 | 2011-02-09 | 魏熙臣 | Multi-backpressure condenser evacuating device |
| CN202938660U (en) * | 2012-11-26 | 2013-05-15 | 华电电力科学研究院 | 600MW subcritical thermal power generating unit double-back-pressure condenser vacuum pumping system |
| CN202973947U (en) * | 2012-12-13 | 2013-06-05 | 华电电力科学研究院 | Double-backpressure-condenser vacuum air exhausting system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499222A (en) * | 2013-09-09 | 2014-01-08 | 广东电网公司电力科学研究院 | Jet type air-bleed system of dual-pressure condenser |
| CN105865220A (en) * | 2016-05-26 | 2016-08-17 | 中国大唐集团科学技术研究院有限公司华东分公司 | Double backpressure condenser optimized operation device and operation method thereof |
| CN105865220B (en) * | 2016-05-26 | 2017-08-04 | 中国大唐集团科学技术研究院有限公司华东分公司 | A kind of operation method of double pressure condenser optimized operating device |
| 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 |
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Application publication date: 20130313 |