CN214118272U - Steam turbine low pressure jar water injection system of thermal power plant - Google Patents
Steam turbine low pressure jar water injection system of thermal power plant Download PDFInfo
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- CN214118272U CN214118272U CN202022730594.5U CN202022730594U CN214118272U CN 214118272 U CN214118272 U CN 214118272U CN 202022730594 U CN202022730594 U CN 202022730594U CN 214118272 U CN214118272 U CN 214118272U
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Abstract
The utility model discloses a steam turbine low-pressure cylinder water spraying system of a thermal power plant, which comprises a condenser, a first condensate pump, a second condensate pump, a first water spray pump, a second water spray pump, a condensate fine treatment device and four groups of low-pressure cylinders, wherein the condenser is respectively communicated with the water inlet ends of the first condensate pump and the second condensate pump; the condenser is respectively communicated with the water inlet ends of the first water spray pump and the second water spray pump, and the water outlet ends of the first water spray pump and the second water spray pump are communicated with the four groups of low-pressure cylinders. Through the design of water jet pump, the utility model discloses according to the operating characteristic of equipment according to the turbine unit, spray the condenser water to the low pressure jar of steam turbine through independent water jet pump, be applicable to the cooling of unit outage back low pressure jar, reduce condensate pump's operating duration, realize energy saving and consumption reduction.
Description
Technical Field
The application relates to a steam turbine low pressure jar water spray technical field especially relates to a steam turbine low pressure jar water spray system of thermal power plant.
Background
The low pressure jar water injection system of present large-scale thermal power factory is got from condensate pump export female pipe, utilize the condensate pump to supply water, the low pressure water injection is mainly at the low-load stage after the steam turbine unit dashes the initial stage and is incorporated into the power networks and the low-load stage of unit outage lowering load and the period of time after the steam turbine is opened the floodgate, the purpose is to reduce steam turbine steam outlet temperature, prevent that the low pressure jar from producing the deformation because of the high temperature, cause equipment to damage, because the low pressure jar water injection of thermal power plant unit outage back will reduce steam turbine steam outlet temperature and continue work, make the condensate pump need accompany the transportation water supply, lead to condensate pump operating time extension, the problem of condensate pump continuation power consumption, therefore we need propose a thermal power plant's steam turbine low pressure jar water injection system.
Disclosure of Invention
An object of the utility model is to provide a steam turbine low pressure jar water spray system of thermal power plant on the basis of thermal power plant's existing equipment, according to the operating characteristic of equipment according to the turboset, sprays the condenser water to the steam turbine low pressure jar through independent water jet pump, is applicable to the cooling of unit shut down back low pressure jar, reduces condensate pump's operating duration, realizes energy saving and consumption reduction to solve the problem that proposes in the above-mentioned background art.
The embodiment of the application adopts the following technical scheme:
a water spraying system for low-pressure cylinders of a steam turbine of a thermal power plant comprises a condenser, a first condensate pump, a second condensate pump, a first water spraying pump, a second water spraying pump, a condensate fine treatment device and four groups of low-pressure cylinders, wherein the condenser is respectively communicated with the water inlet ends of the first condensate pump and the second condensate pump;
the condenser is respectively communicated with the water inlet ends of the first water spray pump and the second water spray pump, and the water outlet ends of the first water spray pump and the second water spray pump are communicated with the four groups of low-pressure cylinders.
Preferably, a first manual door is arranged at a water inlet of the first water spray pump, and a first check valve, a first electric door and a second manual door are sequentially arranged at a water outlet of the first water spray pump.
Preferably, a third manual door is arranged at the water inlet of the second water spray pump, and a second check valve, a second electric door and a fourth manual door are sequentially arranged at the water outlet of the second water spray pump.
Preferably, the water outlets of the first water spray pump and the second water spray pump are provided with a main pipe check valve.
Preferably, one end of the main pipe check valve is communicated with a front manual valve of the low-pressure cylinder water spray regulating valve.
Preferably, the other end of the main pipe check valve is communicated with a low-pressure cylinder water spray regulating valve.
Preferably, one end of the low-pressure cylinder water spray regulating valve is communicated with a rear manual door of the low-pressure cylinder water spray regulating valve, and one end of the rear manual door of the low-pressure cylinder water spray regulating valve is communicated with the low-pressure cylinder.
Preferably, the condensate fine treatment device is respectively communicated with the front manual door of the low-pressure cylinder water spray regulating valve and the bypass manual door of the low-pressure cylinder water spray regulating valve.
Preferably, the water outlet end of the bypass manual door of the low-pressure cylinder water spray regulating valve is communicated with the low-pressure cylinder.
Preferably, the system also comprises two groups of low-voltage motors for driving the water spray pump, and the rated voltage of the low-voltage motor is 380V.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
through the design of spray pump, the utility model discloses on the basis of thermal power plant's existing equipment, according to the operating characteristic of equipment according to the turbine unit, spray the condenser water to the steam turbine low pressure jar through independent spray pump, be applicable to the cooling of unit shut down back low pressure jar, reduce condensate pump's operating duration, realize energy saving and consumption reduction
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a block diagram of the system of the present invention;
in the figure: 1. a first manual door; 2. a first check valve; 3. a first electrically operated door; 4. a second manual door; 5. a third manual door; 6. a second non-return valve; 7. a second electrically operated door; 8. a fourth manual door; 9. a main pipe check valve; 10. a front manual door of the low-pressure cylinder water spray regulating valve; 11. a low pressure cylinder water spray regulating valve; 12. a low-pressure cylinder water spray adjusting valve rear manual door; 13. the low-pressure cylinder water spray regulating valve bypasses the manual valve; 14. a condenser; 15. a first condensate pump; 16. a second condensate pump; 17. a first water jet pump; 18. a second water jet pump; 19. a condensate polishing device; 20. a low pressure cylinder; 21. a shaft seal heater.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, the present invention provides a technical solution: a water spraying system for low-pressure cylinders of a steam turbine of a thermal power plant comprises a condenser 14, a first condensate pump 15, a second condensate pump 16, a first water spray pump 17, a second water spray pump 18, a condensate polishing device 19 and four groups of low-pressure cylinders 20, wherein the condenser 14 is respectively communicated with the water inlet ends of the first condensate pump 15 and the second condensate pump 16, the condensate polishing device 19 is arranged at one end of the water outlet end of the condenser 14, the first condensate pump 15 and the second condensate pump 16 are communicated with the four groups of low-pressure cylinders 20 through the condensate polishing device 19, and a heater 21 is arranged at one end of the condensate polishing device 19;
the condenser 14 is respectively communicated with the water inlet ends of the first water spray pump 17 and the second water spray pump 18, the water outlet ends of the first water spray pump 17 and the second water spray pump 18 are communicated with the four groups of low pressure cylinders 20, and the design can control the water flow of the first water spray pump 17 and prevent water from flowing backwards, so that the control on the water outlet of the first water spray pump 17 is facilitated;
the water inlet of the first water spray pump 17 is provided with a first manual door 1, the water outlet of the first water spray pump 17 is sequentially provided with a first check valve 2, a first electric door 3 and a second manual door 4, and the design can control the water flow of the second water spray pump 18 and prevent water from flowing backwards, so that the control on the water outlet of the second water spray pump 18 is facilitated;
a third manual door 5 is arranged at a water inlet of the second water spray pump 18, a second check valve 6, a second electric door 7 and a fourth manual door 8 are sequentially arranged at a water outlet of the second water spray pump 18, and the design can control the water flow of the second water spray pump 18 and prevent water from flowing backwards, so that the control on the water outlet of the second water spray pump 18 is facilitated;
the water outlets of the first water spray pump 17 and the second water spray pump 18 are provided with a main pipe check valve 9, one end of the main pipe check valve 9 is communicated with a front manual valve 10 of a low-pressure cylinder water spray regulating valve, the other end of the main pipe check valve 9 is communicated with a low-pressure cylinder water spray regulating valve 11, and meanwhile, when the condensate pump A and the condensate pump B work, water cannot be poured into the first water spray pump 17 and the second water spray pump 18, and the front manual valve 10 of the low-pressure cylinder water spray regulating valve mainly seals water from entering the first water spray pump 17 and the second water spray pump 18 when the first water spray pump 17 and the second water spray pump 18 work;
one end of the low-pressure cylinder water spray regulating valve 11 is communicated with a rear manual door 12 of the low-pressure cylinder water spray regulating valve, one end of the rear manual door 12 of the low-pressure cylinder water spray regulating valve is communicated with the low-pressure cylinder, and the design can control the cut-off and circulation of water flow of the first water spray pump 17 and the second water spray pump 18;
the condensate fine treatment device is respectively communicated with a front manual door 10 of the low-pressure cylinder water spray regulating valve and a bypass manual door 13 of the low-pressure cylinder water spray regulating valve, the water outlet end of the bypass manual door 13 of the low-pressure cylinder water spray regulating valve is communicated with the low-pressure cylinder, and the design mainly controls the flow speed and the flow direction of a first water spray pump 17 and a second water spray pump 18.
The working principle is as follows: aiming at the problems of long accompanying time and high electricity consumption of condensate pumps of a first condensate pump 15 and a second condensate pump 16 caused by the requirement of water spraying of a low-pressure cylinder after a thermal power plant unit stops running, the invention provides the 380V low-pressure motor driven independent low-pressure cylinder water spraying system, after the unit is switched on, the first condensate pump 15 and the second condensate pump 16 can switch water spraying to the system to run only by running to the time required by users except for the low-pressure cylinder water spraying user, a control picture is provided with a water spraying system 'on' button and a 'off' button, after the 'on' button is selected, the first water spraying pump 17 and the second water spraying pump 18 are allowed to be started, a first check valve 1, a first electric valve 2, a first electric valve 3 and a second manual valve 4 of the first water spraying pump 17 are started, a third manual valve 5, a second check valve 6, a second electric valve 7 and a fourth manual valve 8 of the second water spraying pump 18 are simultaneously started, the first water spray pump 17 and the second water spray pump 18 are started to operate, the electric door at the outlet is interlocked and opened, the manual door 10 in front of the water spray regulating valve of the low-pressure cylinder is closed, the standby first water spray pump 17 and the standby second water spray pump 18 are put into interlocking (any one of the following requirements is met, the standby water spray pumps are interlocked and started, namely, the first water spray pump 17 and the second water spray pump 18 are operated to trip, the opening of the water spray regulating valve is more than or equal to 85 percent, the steam discharging temperature of any one of the low-pressure cylinder 20 is more than or equal to 75 ℃, the first water spray pump 17 and the second water spray pump 18 are automatically stopped to operate, the condensate system is stopped, the steam discharging temperature of the low-pressure cylinder 20 is controlled in a safety range, the accompanying operation time of the first condensate pump 15 and the second condensate pump 16 due to the water spray requirement of the low-pressure cylinder 20 is greatly shortened, and the pump power consumption of the first condensate pump 15 and the second condensate pump 16 is reduced.
It should be noted that the execution subjects of the steps of the method provided in embodiment 1 may be the same device, or different devices may be used as the execution subjects of the method. For example, the execution subject of steps 21 and 22 may be device 1, and the execution subject of step 23 may be device 2; for another example, the execution subject of step 21 may be device 1, and the execution subjects of steps 22 and 23 may be device 2; and so on.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The utility model provides a steam turbine low pressure jar water injection system of thermal power plant, includes condenser, first condensate pump, second condensate pump, first water spray pump, second water spray pump, condensate fine treatment device and four groups low pressure jar, its characterized in that: the condenser is respectively communicated with the water inlet ends of the first condensate pump and the second condensate pump, a condensate polishing device is arranged at one end of the water outlet end of the condenser, the first condensate pump and the second condensate pump are communicated with the four groups of low-pressure cylinders through the condensate polishing devices, and a shaft seal heater is arranged at one end of the condensate polishing device;
the condenser is respectively communicated with the water inlet ends of the first water spray pump and the second water spray pump, and the water outlet ends of the first water spray pump and the second water spray pump are communicated with the four groups of low-pressure cylinders.
2. The thermal power plant steam turbine low pressure cylinder water injection system of claim 1, characterized in that: the water inlet of the first water spray pump is provided with a first manual door, and the water outlet of the first water spray pump is sequentially provided with a first check valve, a first electric door and a second manual door.
3. The thermal power plant steam turbine low pressure cylinder water injection system of claim 1, characterized in that: the water inlet of the second water spray pump is provided with a third manual door, and the water outlet of the second water spray pump is sequentially provided with a second check valve, a second electric door and a fourth manual door.
4. The thermal power plant steam turbine low pressure cylinder water injection system of claim 1, characterized in that: and the water outlets of the first water spray pump and the second water spray pump are provided with main pipe check valves.
5. The thermal power plant steam turbine low pressure cylinder water injection system of claim 4, characterized in that: one end of the main pipe check valve is communicated with a manual valve in front of the low-pressure cylinder water spray regulating valve.
6. The thermal power plant steam turbine low pressure cylinder water injection system of claim 5, characterized in that: and the other end of the main pipe check valve is communicated with a low-pressure cylinder water spray regulating valve.
7. The thermal power plant steam turbine low pressure cylinder water injection system of claim 5, characterized in that: one end of the low-pressure cylinder water spray regulating valve is communicated with a rear manual door of the low-pressure cylinder water spray regulating valve, and one end of the rear manual door of the low-pressure cylinder water spray regulating valve is communicated with the low-pressure cylinder.
8. The thermal power plant steam turbine low pressure cylinder water injection system of claim 1, characterized in that: and the condensate fine treatment device is respectively communicated with the front manual door of the low-pressure cylinder water spray regulating valve and the bypass manual door of the low-pressure cylinder water spray regulating valve.
9. The thermal power plant steam turbine low pressure cylinder water injection system of claim 8, characterized in that: and the water outlet end of the bypass manual door of the low-pressure cylinder water spray regulating valve is communicated with the low-pressure cylinder.
10. The thermal power plant steam turbine low pressure cylinder water injection system of claim 1, characterized in that: the system also comprises two groups of low-voltage motors for driving the water spray pump, wherein the rated voltage of the low-voltage motor is 380V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022730594.5U CN214118272U (en) | 2020-11-23 | 2020-11-23 | Steam turbine low pressure jar water injection system of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022730594.5U CN214118272U (en) | 2020-11-23 | 2020-11-23 | Steam turbine low pressure jar water injection system of thermal power plant |
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| CN214118272U true CN214118272U (en) | 2021-09-03 |
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| CN202022730594.5U Active CN214118272U (en) | 2020-11-23 | 2020-11-23 | Steam turbine low pressure jar water injection system of thermal power plant |
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