CN205260429U - Large unit boiler feed pump system of power plant - Google Patents
Large unit boiler feed pump system of power plant Download PDFInfo
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- CN205260429U CN205260429U CN201521058502.6U CN201521058502U CN205260429U CN 205260429 U CN205260429 U CN 205260429U CN 201521058502 U CN201521058502 U CN 201521058502U CN 205260429 U CN205260429 U CN 205260429U
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- eliminating device
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Abstract
The utility model relates to a water supply system technical field of power plant, in particular to large unit boiler feed pump system of power plant, including first oxygen -eliminating device, second oxygen -eliminating device and feedwater ejector priming, the output of first oxygen -eliminating device and second oxygen -eliminating device passes through the pipeline and is connected with the input of feedwater ejector priming, the output of feedwater ejector priming is connected with two parallelly connected flow pipe ways. The utility model discloses have the feedwater ejector priming that starts the function as the ejector priming of two units with one, simplified the system architecture, practiced thrift the place resource, simplify house voltage grade, saved the station service in the start -up course, improved the economic nature and the reliability of unit operation.
Description
Technical field
The utility model relates to power plant's water supply system technical field, particularly the large-scale unit boiler feed pump of a kind of power plant system.
Background technology
Power industry is the important foundation industry of national economy, is also emphasis and the look-ahead industry of national economic development strategy. Along with the sustainable and healthy development of China's economy, the installed capacity in the whole nation also increases thereupon. According to the data that on August 16th, 2009 obtains from national work about electric power meeting, China's capacity of installed generator has broken through 800,000,000 kilowatts, wherein 75% Turbo-generator Set from thermal power station and nuclear power station. Expect the year two thousand twenty, the capacity of installed generator of China will reach 1,200,000,000 kilowatts, and wherein thermoelectricity accounts for 65% left and right. In the primary energy structure of China, the ratio maximum that coal resources are shared, is about 75.87%, and this energy resource structure feature certainly will affect coal fired power generation shared ratio in China's generating. According to statistics, coal-fired 65% left and right that accounts for coal total output ratio of China's generating, this situation is estimated also will continue the quite a long time. Because coal resource is non-renewable energy resources, for offspring considers, can not wasting and exhaust, is exactly a urgent task so improve coal using energy source level, but China's fired power generating unit exists problems at present, be mainly manifested in: the shared ratio of consumption coal fired power generating unit low, that efficiency is high is low, conventional little fired power generating unit ratio is excessive, and single-machine capacity is less than normal, although by " upper large pressure is little " policy, close a large amount of units below 200MW, also had a certain distance compared with international most advanced level.
In order to meet unit starting requirement flexibly, in power plant, is conventionally furnished with electrically driven feed pump. Function distinguishing according to electrically driven feed pump in unit, is divided into and starts pump and startup/stand-by pump two kinds.
(1) start pump: it acts on only in unit starting process, flow and pressure requirement while meeting unit starting. Under certain load, be switched to after heat pump, excision, exits water supply system.
(2) startup/stand-by pump: the requirement of flow and pressure when its effect not only will meet unit starting. Meanwhile, in unit running process, in stand-by heat, in the time that a steam feed pump breaks down, can with another steam feed pump paired running, maintain unit and under high load, move trying one's best.
China has put into operation or at the 600MW super (super-) critical pure condensate unit of building, from simplification system, has reduced the angle of initial cost at present, and electrodynamic pump can only be considered its start-up performance or cancel electrically driven feed pump.
In order to meet unit starting requirement flexibly, in power plant, is conventionally furnished with electrically driven feed pump. Function distinguishing according to electrically driven feed pump in unit, is divided into and starts pump and startup/stand-by pump two kinds.
1) start pump: it acts on only in unit starting process, flow and pressure requirement while meeting unit starting. Under certain load, be switched to after heat pump, excision, exits water supply system.
2) startup/stand-by pump: the requirement of flow and pressure when its effect not only will meet unit starting. Meanwhile, in unit running process, in stand-by heat, in the time that a steam feed pump breaks down, can with another steam feed pump paired running, maintain unit and under high load, move trying one's best.
Utility model content
The purpose of this utility model is for the deficiencies in the prior art, and a kind of power plant large-scale unit boiler feed pump system is provided.
For addressing the above problem, the utility model provides following technical scheme:
A kind of power plant large-scale unit boiler feed pump system, comprises that the first oxygen-eliminating device, the second oxygen-eliminating device and feedwater start pump; The output of described the first oxygen-eliminating device and the second oxygen-eliminating device is connected with the input that feedwater starts pump by pipeline; Described feedwater starts delivery side of pump and is connected with two water pipelines in parallel.
Further, described feedwater startup pump is the startup pump of 25% ~ 30% capacity.
Further, on the pipeline that described the first oxygen-eliminating device is connected with the second oxygen-eliminating device and feedwater startup pump, water tank is all installed.
Further, two described water pipeline one roads are connected to the feed water system of boiler No. 1, and another road is connected to the feed water system of boiler No. 2.
Beneficial effect: a kind of power plant of the present utility model large-scale unit boiler feed pump system, start the startup pump of pump as two units with a feedwater with start-up performance, simplify system architecture, save place resource; Simplify station-service electric pressure, saved the station service in start-up course, improved economy and the reliability of unit operation.
Brief description of the drawings
Fig. 1 is structure principle chart of the present utility model;
Description of reference numerals: feedwater starts pump 1, the first oxygen-eliminating device 2, the second oxygen-eliminating devices 3, water tank 4.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, specific embodiment of the utility model is described in further detail:
With reference to a kind of power plant large-scale unit boiler feed pump system shown in Fig. 1, comprise that the first oxygen-eliminating device 2, the second oxygen-eliminating device 3 and feedwater start pump 1; The output of described the first oxygen-eliminating device 2 and the second oxygen-eliminating device 3 is connected with the input that feedwater starts pump 1 by pipeline; The output that described feedwater starts pump 1 is connected with two water pipelines in parallel.
It is the startup pump of 25% ~ 30% capacity that described feedwater starts pump 1.
On the pipeline that described the first oxygen-eliminating device 2 is connected with the second oxygen-eliminating device 3 and feedwater startup pump 1, water tank 4 is all installed.
Two described water pipeline one roads are connected to the feed water system of boiler No. 1, and another road is connected to the feed water system of boiler No. 2.
Carry out self-starting boiler owing to starting steam, parameter can not ensure to meet the requirement that heat pump directly starts, and therefore, domestic full capacity steam feed pump of recommend adoption, as process pump, is established 1 feedwater with start-up performance and started pump 1. The feedwater of configuration starts pump 1 should select 25 ~ 30% capacity, to meet boiler startup requirement.
As shown in Figure 1, two units configure a set of 30%BMCR capacity, start with feedwater air driven pump. Feedwater is by entering into water tank 4 after the first oxygen-eliminating device 2 and the second oxygen-eliminating device 3 deoxygenations, condensate water enters feedwater from water tank 4 and starts pump 1, and feedwater starts the startup feed pump of pump 1 as two units, can also can supply No. 2 boilers for No. 1 boiler.
The above, it is only preferred embodiment of the present utility model, not technical scope of the present utility model is made to any restriction, therefore any trickle amendment, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all still belong in the scope of the technical solution of the utility model.
Claims (4)
1. the large-scale unit boiler feed pump of a power plant system, is characterized in that: comprise that the first oxygen-eliminating device (2), the second oxygen-eliminating device (3) and feedwater start pump (1); The output of described the first oxygen-eliminating device (2) and the second oxygen-eliminating device (3) is connected with the input that feedwater starts pump (1) by pipeline; The output that described feedwater starts pump (1) is connected with two water pipelines in parallel.
2. a kind of power plant according to claim 1 large-scale unit boiler feed pump system, is characterized in that: it is the startup pump of 25% ~ 30% capacity that described feedwater starts pump (1).
3. a kind of power plant according to claim 1 large-scale unit boiler feed pump system, is characterized in that: on the pipeline that described the first oxygen-eliminating device (2) is connected with the second oxygen-eliminating device (3) and feedwater startup pump (1), water tank (4) is all installed.
4. a kind of power plant according to claim 1 large-scale unit boiler feed pump system, is characterized in that: two described water pipeline one roads are connected to the feed water system of boiler No. 1, and another road is connected to the feed water system of boiler No. 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521058502.6U CN205260429U (en) | 2015-12-18 | 2015-12-18 | Large unit boiler feed pump system of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521058502.6U CN205260429U (en) | 2015-12-18 | 2015-12-18 | Large unit boiler feed pump system of power plant |
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| Publication Number | Publication Date |
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| CN205260429U true CN205260429U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521058502.6U Active CN205260429U (en) | 2015-12-18 | 2015-12-18 | Large unit boiler feed pump system of power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044631A (en) * | 2016-11-15 | 2017-08-15 | 河南中烟工业有限责任公司 | A kind of residual neat recovering system of thermal deaerator discharge |
-
2015
- 2015-12-18 CN CN201521058502.6U patent/CN205260429U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044631A (en) * | 2016-11-15 | 2017-08-15 | 河南中烟工业有限责任公司 | A kind of residual neat recovering system of thermal deaerator discharge |
| CN107044631B (en) * | 2016-11-15 | 2019-08-27 | 河南中烟工业有限责任公司 | A kind of residual neat recovering system of thermal deaerator discharge |
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