CN212376701U - Structure for maintaining operation of steam feed pump under low-load working condition - Google Patents
Structure for maintaining operation of steam feed pump under low-load working condition Download PDFInfo
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- CN212376701U CN212376701U CN202020579400.3U CN202020579400U CN212376701U CN 212376701 U CN212376701 U CN 212376701U CN 202020579400 U CN202020579400 U CN 202020579400U CN 212376701 U CN212376701 U CN 212376701U
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Abstract
The utility model provides a structure of maintaining steam feed pump operation under low-load operating mode has solved the problem that steam feed pump can't move under the low-load operating mode. The steam discharging pipeline of the steam feed pump is connected with the steam feed pump; one end of the low-pressure steam pipeline is connected with a steam discharging pipeline of the steam feed pump, and the other end of the low-pressure steam pipeline is connected with the pressure adapter; the first electric valve and the first check valve are arranged on the low-pressure steam pipeline; the medium-pressure driving steam pipeline is connected with a pressure adapter; the second electric valve is arranged on the medium-pressure driving steam pipeline; one end of a steam exhaust pipeline of the pressure matcher is connected with the pressure matcher, and the other end of the steam exhaust pipeline of the pressure matcher is connected with a high-pressure deaerator; the safety valve, the third electric valve and the second check valve are all arranged on the steam exhaust pipeline of the pressure matcher.
Description
Technical Field
The utility model relates to a structure of steam feed pump operation is maintained under low-load operating mode.
Background
In the cogeneration project, a steam-driven feed water pump is a common auxiliary equipment, the exhaust steam of the steam-driven feed water pump is commonly used for heating a low-pressure deaerator (a multi-finger atmospheric deaerator), the normal operation of the equipment can effectively reduce the plant power consumption rate, and the running economy of the whole plant is improved. In actual operation, the heat load fluctuation of part of the cogeneration projects is large, and under a low-load working condition, the steam quantity for heating steam by the low-pressure deaerator is too low, so that the steam-driven water-feeding pump cannot normally operate. Aiming at the technical difficulty, the problem is solved by frequently starting and stopping the pump in the actual operation at present, the workload of operators is undoubtedly increased by the mode, the loss of equipment is large due to frequent starting and stopping, and the economical efficiency of the whole plant operation is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structure of maintaining the operation of steam-operated feed-water pump under the low-load operating mode that structural design is reasonable, solved the problem that steam-operated feed-water pump can't move under the low-load operating mode.
The utility model provides a technical scheme that above-mentioned problem adopted is: a structure for maintaining the operation of a steam-driven feed water pump under a low-load working condition comprises the steam-driven feed water pump, a high-pressure deaerator and a steam exhaust pipeline of the steam-driven feed water pump; the steam discharging pipeline of the steam feed pump is connected with the steam feed pump; the method is characterized in that: the steam-water separator also comprises a low-pressure steam pipeline, a first electric valve, a first check valve, a medium-pressure driving steam pipeline, a second electric valve, a pressure adapter steam exhaust pipeline, a safety valve, a third electric valve, a second check valve and a high-pressure deaerator; one end of the low-pressure steam pipeline is connected with a steam discharging pipeline of the steam feed pump, and the other end of the low-pressure steam pipeline is connected with the pressure adapter; the first electric valve and the first check valve are arranged on the low-pressure steam pipeline; the medium-pressure driving steam pipeline is connected with a pressure adapter; the second electric valve is arranged on the medium-pressure driving steam pipeline; one end of a steam exhaust pipeline of the pressure matcher is connected with the pressure matcher, and the other end of the steam exhaust pipeline of the pressure matcher is connected with a high-pressure deaerator; the safety valve, the third electric valve and the second check valve are all arranged on the steam exhaust pipeline of the pressure matcher.
The steam-driven feed pump exhaust pipe on be provided with temperature measurement station and pressure measurement station.
A electric valve and No. two electric valve be electric gate valve.
No. three electric valve be electric stop valve.
A method for maintaining the operation of a steam feed pump under a low-load working condition is carried out by adopting a structure for maintaining the operation of the steam feed pump under the low-load working condition, and comprises the following steps:
when the working condition is normal, the first electric valve, the second electric valve and the third electric valve are closed, and the exhaust steam of the steam feed water pump enters the low-pressure deaerator through a steam feed water pump exhaust steam pipeline and is only used for heating the low-pressure deaerator; heating steam of the high-pressure deaerator is provided by heating steam in a plant, and the pressure matcher does not operate at the moment;
when the heat load is low to a certain degree, because the low pressure oxygen-eliminating device for heating steam with the vapour volume low excessively, lead to the unable operation of steam-driven feed pump, open electric valve this moment, No. two electric valve and No. three electric valve, open the interior middling pressure heat supply steam of factory, steam passes through middling pressure drive steam conduit and gets into the pressure adapter, the pressure adapter pumps the exhaust low pressure steam of steam-driven feed pump, steam after the matching passes through pressure adapter exhaust steam conduit and gets into the high pressure oxygen-eliminating device, be used for heating the high pressure oxygen-eliminating device, and then increased the vapour volume for steam-driven feed pump
Compared with the prior art, the utility model, have following advantage and effect: the utility model discloses utilize in the factory middling pressure steam suction pneumatic pump backpressure steam extraction to reach certain pressure and remove heating high pressure oxygen-eliminating device, and then increased the vapour volume for the pneumatic pump, and then solved the problem that the vapour feed pump can't move under the low-load operating mode. The utility model discloses be favorable to the system operation stable, can maintain the vapor-operated pump operation, can reduce the station service power rate and improve the operation economic nature.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, the embodiment of the utility model provides a steam feed pump 1, steam feed pump exhaust pipe 2, pressure measurement point 3, temperature measurement point 4, low pressure steam conduit 5, an electric valve 6, a check valve 7, middling pressure drive steam conduit 8, No. two electric valve 9, pressure adapter 10, pressure adapter exhaust pipe 11, relief valve 12, high-pressure oxygen-eliminating device 13, No. three electric valve 14 and No. two check valves 15.
The steam-driven water-feeding pump exhaust pipeline 2 is connected with the steam-driven water-feeding pump 1, and the steam-driven water-feeding pump 1 is connected with the low-pressure deaerator through the steam-driven water-feeding pump exhaust pipeline 2.
And a temperature measuring point 4 and a pressure measuring point 3 are arranged on the steam exhaust pipeline 2 of the steam feed pump.
One end of the low-pressure steam pipeline 5 is connected with the steam discharging pipeline 2 of the steam feed pump, and the other end is connected with the pressure matcher 10.
An electric valve 6 and a check valve 7 are arranged on the low-pressure steam pipeline 5. The first electric valve 6 is started and stopped in a linkage mode or manually controlled according to a set value of a temperature pressure measuring point on the steam exhaust pipeline 2 of the steam feed pump, and the first check valve 7 prevents medium-pressure steam from flowing into the steam exhaust pipeline 2 of the steam feed pump in a reverse flow mode.
The medium-pressure driving steam pipeline 8 is connected with a pressure adapter 10. The pressure adapter 10 is connected with a medium-pressure heat supply steam pipeline in a factory through a medium-pressure driving steam pipeline 8.
The second electric valve 9 is installed on the medium-pressure driving steam pipeline 8, and the second electric valve 9 is started and stopped in a linkage mode or manually controlled according to a set value of a temperature pressure measuring point on the steam exhaust pipeline 2 of the steam feed pump.
One end of a pressure matcher steam exhaust pipeline 11 is connected with a pressure matcher 10, and the other end of the pressure matcher steam exhaust pipeline is connected with a high-pressure deaerator 13.
The pressure matcher steam exhaust pipeline 11 is provided with a safety valve 12 to prevent the matched steam from being in overpressure.
A second check valve 15 is installed on a steam exhaust pipeline 11 of the pressure matcher to prevent high-parameter steam in the deaerator from flowing back into the pressure matcher 10.
The third electric valve 14 is installed on the steam exhaust pipeline 11 of the pressure matcher.
A method for maintaining operation of a steam feed water pump under a low-load working condition comprises the following steps:
in normal working conditions, the first electric valve 6, the second electric valve 9 and the third electric valve 14 are closed, and exhaust steam of the steam feed pump 1 enters the low-pressure deaerator through the steam feed pump exhaust steam pipeline 2 and is only used for heating the low-pressure deaerator; the heating steam of the high-pressure deaerator 13 is provided by the heating steam in the plant, and the pressure matcher 10 is not operated at this time.
When the heat load is low to a certain degree, because the steam volume for heating steam of the low-pressure deaerator is too low, when the steam discharge pressure of the steam-driven feed pump 1 is increased to a certain set value (the value is set according to parameters provided by a steam-driven feed pump manufacturer), the electric valve 6 at the first time, the electric valve 9 at the second time and the electric valve 14 at the third time are opened, the medium-pressure heat supply steam in the factory is opened, the steam enters the pressure matcher 10 through the medium-pressure driving steam pipeline 8, the pressure matcher 10 sucks the low-pressure steam discharged by the steam-driven feed pump 1, the matched steam enters the high-pressure deaerator 13 through the pressure matcher steam discharge pipeline 11 and is used for heating the high-pressure deaerator, the steam volume for the steam-driven feed pump 1 is increased, and the problem that the steam-driven feed pump cannot operate under.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. A structure for maintaining the operation of a steam-driven feed water pump under a low-load working condition comprises the steam-driven feed water pump, a high-pressure deaerator and a steam exhaust pipeline of the steam-driven feed water pump; the steam discharging pipeline of the steam feed pump is connected with the steam feed pump; the method is characterized in that: the steam-water separator also comprises a low-pressure steam pipeline, a first electric valve, a first check valve, a medium-pressure driving steam pipeline, a second electric valve, a pressure adapter steam exhaust pipeline, a safety valve, a third electric valve, a second check valve and a high-pressure deaerator; one end of the low-pressure steam pipeline is connected with a steam discharging pipeline of the steam feed pump, and the other end of the low-pressure steam pipeline is connected with the pressure adapter; the first electric valve and the first check valve are arranged on the low-pressure steam pipeline; the medium-pressure driving steam pipeline is connected with a pressure adapter; the second electric valve is arranged on the medium-pressure driving steam pipeline; one end of a steam exhaust pipeline of the pressure matcher is connected with the pressure matcher, and the other end of the steam exhaust pipeline of the pressure matcher is connected with a high-pressure deaerator; the safety valve, the third electric valve and the second check valve are all arranged on the steam exhaust pipeline of the pressure matcher.
2. The structure for maintaining operation of a steam feed water pump under low load conditions according to claim 1, characterized in that: and a temperature measuring point and a pressure measuring point are arranged on the steam discharging pipeline of the steam-driven water-feeding pump.
3. The structure for maintaining operation of a steam feed water pump under low load conditions according to claim 1, characterized in that: the first electric valve and the second electric valve are electric gate valves.
4. The structure for maintaining operation of a steam feed water pump under low load conditions according to claim 1, characterized in that: the third electric valve is an electric stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020579400.3U CN212376701U (en) | 2020-04-17 | 2020-04-17 | Structure for maintaining operation of steam feed pump under low-load working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020579400.3U CN212376701U (en) | 2020-04-17 | 2020-04-17 | Structure for maintaining operation of steam feed pump under low-load working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212376701U true CN212376701U (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020579400.3U Active CN212376701U (en) | 2020-04-17 | 2020-04-17 | Structure for maintaining operation of steam feed pump under low-load working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212376701U (en) |
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2020
- 2020-04-17 CN CN202020579400.3U patent/CN212376701U/en active Active
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