CN217783743U - Sealing water supply and return system of steam feed pump - Google Patents
Sealing water supply and return system of steam feed pump Download PDFInfo
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- CN217783743U CN217783743U CN202221275514.4U CN202221275514U CN217783743U CN 217783743 U CN217783743 U CN 217783743U CN 202221275514 U CN202221275514 U CN 202221275514U CN 217783743 U CN217783743 U CN 217783743U
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Abstract
The utility model provides a sealed water of steam-operated feed pump supplies return water system belongs to sealed water and supplies return water control technical field, sealed water supply booster pump has been increased, reserve sealed water source and bleeder line, the problem that sealed water pressure can not satisfy the sealed requirement of feed pump when having solved the unit low-load, the sealed requirement of feed pump when having satisfied the unit low-load operation, the risk of potential safety hazard and condenser oil feed that arouse when having avoided sealed water source to lose, can popularize and apply on the unit that disposes the steam-operated feed pump.
Description
Technical Field
The utility model relates to a sealed water supplies return water control technical field, in particular to steam feed pump sealed water supplies return water system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The sealing mode of the modern water supply pump generally adopts mechanical sealing, unloading type labyrinth sealing or spiral sealing, and the water source is usually from a condensed water system. When the sealing water passes through the sealing element, the water forms a water film between the shaft and the sealing element along with the high-speed rotation of the shaft, and the bearing and the sealing element are prevented from being directly rubbed. A conventional sealing water system is generally only provided with a water source from condensed water desuperheating water, the condensed water is directly used as a sealing water source to be connected into a feed pump, and the sealing water backwater is directly connected into a condenser.
The conventional sealing water system mainly has the following three disadvantages: firstly, because the booster pump is not arranged on the sealed water supply pipeline, when the unit depth peak load is lower, the pressure of the condensed water is lower, and the requirement of sealing the water supply pump cannot be met; secondly, a standby water source is not set for the sealing water, and once the sealing water source is lost during debugging or running of the unit, lubricating oil of a water supply pump turbine is easily pumped into a condenser in a vacuum manner by the condenser; thirdly, a water drain pipeline isolated from the condenser is not arranged on the sealed water return pipeline
Combining with the feedback of the prior engineering site, when a sealed water source is lost, high-temperature water in a pump body enters a single-stage water seal, the high-temperature water in a water seal cylinder is quickly evaporated under the vacuum action of a condenser to destroy the water seal, so that a sealed water return cavity of a water supply pump is in a vacuum state, and meanwhile, as the flow area of a vent valve at the upper part of the sealed water return cavity of the water supply pump is small and is not enough to balance the pressure in the water return cavity, oil in a water pump bearing bush oil return cavity is sucked into a sealed water side to enter the condenser in a short time, and at the moment, the oil cannot be quickly reacted manually and is isolated and switched in a short time, so that lubricating oil enters the condenser, and the condenser is cleaned and flushed by a large amount of manpower and financial resources; meanwhile, the lubricating oil entering the condenser pollutes the condensed water in the condenser hot well, so that the condensed water fine treatment resin is invalid, and great economic loss is caused to the engineering; in addition, when the sealed water source is lost, high-temperature and high-pressure water supply can be sprayed out along a shaft system, and great potential safety hazards exist.
Disclosure of Invention
The problem that the feed pump sealing water pressure is low when solving the unit low-load to and the risk of potential safety hazard and condenser oil feed that arouse when avoiding sealed water source to lose, the utility model provides a sealed water of steam-operated feed pump supplies return water system has increased sealed water supply booster pump, reserve sealed water source and water drain pipe, has satisfied the sealed requirement of feed pump when the unit low-load operation, has avoided a series of risks that bring when sealed water source loses simultaneously.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a kind of steam feed pump seal water supplies the backwater system, include at least:
a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline;
the first pipeline is communicated with a third pipeline, the first pipeline is sequentially provided with a third shut-off valve and a third check valve, the second pipeline is communicated with the third pipeline, the third pipeline is sequentially provided with a first check valve, a first shut-off valve, a booster pump, a second check valve and a second shut-off valve, a water outlet side pipeline of the second shut-off valve is communicated with a water inlet port of a sixth pipeline, a water outlet port of the sixth pipeline is communicated with the steam-driven water feed pump sequentially through a flow measuring device and a regulating valve, and the sixth pipeline is provided with a filter screen and a filter screen front and back shut-off valve;
one end of the fourth pipeline is communicated with the water outlet side pipeline of the booster pump, the other end of the fourth pipeline is communicated with the second pipeline, and a first throttling orifice plate and a fourth shutoff valve are sequentially arranged on the fourth pipeline;
one end of the fifth pipeline is communicated with a water outlet side pipeline of the second shutoff valve, one end of the fifth pipeline is communicated with a water inlet side pipeline of the first shutoff valve, and the fifth pipeline is sequentially provided with a fifth shutoff valve, a fourth check valve and a sixth shutoff valve.
Furthermore, the output end of the water feeding pump is communicated with the water inlet port of a seventh pipeline, the water outlet port of the seventh pipeline is communicated with a water seal pipe, and a seventh shut-off valve is arranged on the seventh pipeline.
Furthermore, the water inlet port of the eighth pipeline is communicated with the water inlet side pipeline of the seventh shut-off valve, the water outlet port of the eighth pipeline is communicated with the condensate pump pit or the sewage pit, and the eighth pipeline is provided with an eighth shut-off valve.
Furthermore, the water inlet port of the ninth pipeline is communicated with the water seal pipe, and the ninth pipeline is provided with a ninth shut-off valve.
Furthermore, one end of a tenth pipeline is communicated with the second pipeline, the other end of the tenth pipeline is communicated with the water seal pipe, and a second throttling orifice plate and a tenth shutoff valve are sequentially arranged on the tenth pipeline.
As an optional implementation manner, one end of the tenth pipeline is communicated with the second pipeline through a pipe wall of the second pipeline.
Furthermore, one end of an eleventh pipeline is communicated with the water seal pipe, the other end of the eleventh pipeline is communicated with the condenser, and an eleventh shut-off valve is arranged on the eleventh pipeline.
As an alternative implementation, the first conduit communicates with the outlet-side conduit of the first check valve.
As an optional implementation mode, the filter screen and the front and rear shutoff valves of the filter screen are at least provided with two pipelines connected in parallel.
As an optional implementation manner, the third pipeline and the fourth pipeline are respectively communicated with the second pipeline through a pipe wall of the second pipeline.
Compared with the prior art, the beneficial effects of the utility model are that:
1. sealed water of steam-feed water pump supplies return water system, increased sealed water supply booster pump, reserve sealed water source and water drain pipe, sealed water pressure can not satisfy the problem of the sealed requirement of water-feed pump when having solved the unit low-load, the sealed requirement of water-feed pump when having satisfied the unit low-load operation, the risk of potential safety hazard and condenser oil feed that arouses when having avoided sealed water source to lose can popularize and apply on the unit that disposes steam-feed water pump.
2. The sealing water supply and return system of the steam feed pump is additionally provided with the sealing water booster pump, so that the pressure requirement of sealing water can be ensured even if the unit is low in load; the demineralized water is added as a standby water source, so that the lubricating oil is prevented from entering the condenser due to the damage of a water seal after the water supply of the sealing water is cut off; a water drain pipeline is added on the sealing water return pipeline to realize the isolation of the sealing water return and the condenser, or the switching is carried out when the condenser is provided with vacuum and is in on-line water seal water injection under the corresponding operation condition of the steam pump.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic structural view of a sealing water supply and return system of a steam feed pump provided by an embodiment of the present invention.
Wherein, 1, a first pipeline; 2. a second pipe; 3. a third pipeline; 4. a fourth conduit; 5. a fifth pipeline; 6. a sixth pipeline; 7. a seventh pipe; 8. an eighth conduit; 9. a ninth conduit; 10. a tenth conduit; 11. an eleventh pipe; 12. a booster pump; 13. the filter screen and the front and rear shutoff valves of the filter screen; 14. water sealing the pipe; 15. a condenser; 16. a first shut-off valve; 17. a first check valve; 18. a third shutoff valve; 19. a third check valve; 20. a first orifice plate; 21. a fourth shutoff valve; 22. a sixth shutoff valve; 23. a fourth check valve; 24. a fifth shutoff valve; 25. a flow measuring device; 26. adjusting a valve; 27. a seventh shutoff valve; 28. an eighth shutoff valve; 29. an eleventh shutoff valve; 30. a second orifice plate; 31. a tenth shutoff valve; 32. a ninth shut-off valve; 33. a second shutoff valve; 34. a second check valve; 35. a steam feed pump; 36. a condensate pump pit or a sewage pit.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the case of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.
The embodiment is as follows:
the embodiment of the utility model provides a steam feed pump sealing water supplies return water system, there are two sealing water source pipelines, be the condensate water that comes from condensate water desuperheating water pipeline and come from the demineralized water pipeline respectively, two way water sources connect to respectively on the sealing water inlet pipeline before the booster pump to be provided with booster pump bypass pipeline; be provided with the booster pump on the sealed water supply pipe for sealed water pressure's demand when guaranteeing the unit low-load, the booster pump number can set up according to actual need, but the pump is used to equipment.
The outlet of the booster pump is provided with a recirculation pipeline, the recirculation pipeline is provided with a throttling orifice plate and a shutoff valve, and the throttling and depressurizing water returns to the condensed water temperature-reducing water pipeline; a filter screen and a filter screen front and rear shutoff valve are arranged on the sealing water supply pipeline to ensure the purity of the sealing water; in order to monitor the sealing water flow of the steam feed pump, flow measuring devices are respectively arranged on the sealing water pipelines; in order to realize the adjustment of the pressure of the sealing water, an adjusting valve is arranged on a sealing water inlet pipeline of the water feeding pump; a water discharge pipeline and a shut-off valve which are isolated from the condenser are arranged on the sealing water return pipeline, the valve actuating mechanism can be manual, electric or pneumatic according to actual needs, and when the valve actuating mechanism is electric or pneumatic, a sealing water return temperature value is required to be used as monitoring input to set related linkage; the water can be discharged to a condensate pump pit or other sewage draining pits and the like.
The water seal pipeline is provided with a condensed water replenishing pipeline, and the pipeline is provided with a vacuum shutoff valve and a throttling orifice plate; an air release pipeline and a valve are arranged above the water seal pipeline; set up the drain pipe on the water seal pipeline and connect to the condenser to set up the vacuum shutoff valve on the drain pipe, valve executive structure can be manual, electronic or pneumatics according to actual need.
Specifically, as shown in fig. 1, the system includes a first pipeline 1 (i.e., a demineralized water source pipeline), a second pipeline 2 (i.e., a condensed water temperature-reducing water pipeline), a third pipeline 3 (i.e., a sealed water condensed water temperature-reducing water pipeline), a fourth pipeline 4 (i.e., a booster pump recirculation pipeline), a fifth pipeline 5 (i.e., a sealed water bypass pipeline), a sixth pipeline 6 (i.e., a sealed water supply pipeline), a seventh pipeline 7 (i.e., a sealed water return pipeline), an eighth pipeline 8 (i.e., a sealed water drain pipeline), a ninth pipeline 9 (i.e., a water seal air discharge pipeline), a tenth pipeline 10 (i.e., a water seal water supply pipeline), and an eleventh pipeline 11 (i.e., a water seal water drain pipeline).
The first pipeline 1 is communicated with the third pipeline 3, the first pipeline 1 is sequentially provided with a third stop valve 18 (namely a sealing water demineralized water source stop valve) and a third check valve 19 (namely a sealing water demineralized water source check valve), the second pipeline 2 is communicated with the third pipeline 3, the third pipeline 3 is sequentially provided with a first check valve 17 (namely a sealing water condensed water source check valve), a first stop valve 16 (namely a booster pump front stop valve), a booster pump 12, a second check valve 34 (namely a sealing water condensed water source check valve) and a second stop valve 33 (namely a booster pump rear stop valve), a water outlet side pipeline of the second stop valve 33 is communicated with a water inlet port of the sixth pipeline 6, a water outlet port of the sixth pipeline 6 is communicated with the steam-driven feed pump 35 sequentially through a flow measuring device 25 and a regulating valve 26, and the sixth pipeline 6 is provided with a filter screen and a filter screen front-rear stop valve 13;
in the embodiment, the filter screen and the front and rear shutoff valves 13 of the filter screen are at least provided with two parallel paths;
one end of the fourth pipeline 4 is communicated with the water outlet side pipeline of the booster pump 12, the other end of the fourth pipeline 4 is communicated with the second pipeline 2, and the fourth pipeline 4 is sequentially provided with a first orifice plate 20 and a fourth shutoff valve 21 (namely a booster pump recirculation pipeline shutoff valve);
one end of the fifth pipeline 5 is communicated with the water outlet side pipeline of the second shut-off valve 33, one end of the fifth pipeline 5 is communicated with the water inlet side pipeline of the first shut-off valve 16, and the fifth pipeline 5 is sequentially provided with a fifth shut-off valve 24 (a sealed water bypass pipeline shut-off valve), a fourth check valve 23 (a sealed water bypass pipeline check valve) and a sixth shut-off valve 22 (a sealed water bypass pipeline shut-off valve).
In this embodiment, optionally, the first pipe 1 communicates with the outlet side pipe of the first check valve 17.
In this embodiment, optionally, the third pipeline 3 and the fourth pipeline 4 are respectively communicated with the second pipeline 2 through a pipe wall of the second pipeline 2.
The output end of the steam feed water pump 35 is communicated with the water inlet port of the seventh pipeline 7, the water outlet port of the seventh pipeline 7 is communicated with the water seal pipe 14, and the seventh pipeline 7 is provided with a seventh shut-off valve 27 (namely, a closed water return pipeline shut-off valve).
The water inlet port of the eighth pipeline 8 is communicated with the water inlet side pipeline of the seventh shut-off valve 27, the water outlet port of the eighth pipeline 8 is communicated with the condensate pump pit or the sewage drain pit 36, and the eighth pipeline 8 is provided with an eighth shut-off valve 28 (namely, a seal water drain pipeline shut-off valve).
The water inlet port of the ninth pipeline 9 is communicated with the water seal pipe 14, and the ninth pipeline 9 is provided with a ninth shut-off valve 32 (namely a water seal pipe water discharging vacuum shut-off valve).
One end of the tenth pipeline 10 is communicated with the second pipeline 2, the other end of the tenth pipeline 10 is communicated with the water seal pipe 14, and the tenth pipeline 10 is sequentially provided with a second orifice plate 30 and a tenth shut-off valve 31 (namely a water replenishing shut-off valve of the water seal pipe).
In this embodiment, it is preferable that one end of the tenth pipe 10 is communicated with the second pipe 2 through a pipe wall of the second pipe 2.
One end of the eleventh pipeline 11 is communicated with the water seal pipe 14, the other end of the eleventh pipeline 11 is communicated with the condenser 15, and an eleventh shut-off valve 29 (namely a water seal pipe water discharge vacuum shut-off valve) is arranged on the eleventh pipeline 11.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a steam feed pump sealing water supplies return water system which characterized in that:
at least comprises the following steps:
a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline and a sixth pipeline;
the first pipeline is communicated with a third pipeline, the first pipeline is sequentially provided with a third shut-off valve and a third check valve, the second pipeline is communicated with the third pipeline, the third pipeline is sequentially provided with a first check valve, a first shut-off valve, a booster pump, a second check valve and a second shut-off valve, a water outlet side pipeline of the second shut-off valve is communicated with a water inlet port of a sixth pipeline, a water outlet port of the sixth pipeline is communicated with the steam-driven water feed pump sequentially through a flow measuring device and a regulating valve, and the sixth pipeline is provided with a filter screen and a filter screen front and back shut-off valve;
one end of the fourth pipeline is communicated with the water outlet side pipeline of the booster pump, the other end of the fourth pipeline is communicated with the second pipeline, and a first throttling orifice plate and a fourth shutoff valve are sequentially arranged on the fourth pipeline;
one end of the fifth pipeline is communicated with a water outlet side pipeline of the second shutoff valve, one end of the fifth pipeline is communicated with a water inlet side pipeline of the first shutoff valve, and the fifth pipeline is sequentially provided with a fifth shutoff valve, a fourth check valve and a sixth shutoff valve.
2. The steam feed water pump seal water supply and return water system of claim 1, wherein:
the output end of the steam feed water pump is communicated with the water inlet port of the seventh pipeline, the water outlet port of the seventh pipeline is communicated with the water seal pipe, and the seventh pipeline is provided with a seventh shutoff valve.
3. The steam feed water pump seal water supply and return water system of claim 2, characterized in that:
and a water inlet port of the eighth pipeline is communicated with a water inlet side pipeline of the seventh shut-off valve, a water outlet port of the eighth pipeline is communicated with the condensate pump pit or the sewage pit, and the eighth pipeline is provided with an eighth shut-off valve.
4. The steam feed water pump seal water supply and return water system of claim 2, characterized in that:
and a water inlet port of the ninth pipeline is communicated with the water seal pipe, and a ninth shut-off valve is arranged on the ninth pipeline.
5. The steam feed water pump seal water supply and return water system of claim 2, characterized in that:
one end of the tenth pipeline is communicated with the second pipeline, the other end of the tenth pipeline is communicated with the water seal pipe, and a second throttling orifice plate and a tenth shutoff valve are sequentially arranged on the tenth pipeline.
6. The seal water supply and return system of the steam feed water pump according to claim 5, characterized in that:
one end of the tenth pipeline is communicated with the second pipeline through the pipe wall of the second pipeline.
7. The steam feed water pump seal water supply and return water system of claim 2, characterized in that:
one end of the eleventh pipeline is communicated with the water seal pipe, the other end of the eleventh pipeline is communicated with the condenser, and an eleventh shut-off valve is arranged on the eleventh pipeline.
8. The steam feed water pump seal water supply and return water system of claim 1, wherein:
the first pipeline is communicated with the water outlet side pipeline of the first check valve.
9. The steam feed water pump seal water supply and return water system of claim 1, wherein:
the filter screen and the front and back shut-off valves of the filter screen are at least provided with two pipelines which are connected in parallel.
10. The steam feed water pump seal water supply and return water system of claim 1, wherein:
the third pipeline and the fourth pipeline are respectively communicated with the second pipeline through the pipe wall of the second pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221275514.4U CN217783743U (en) | 2022-05-25 | 2022-05-25 | Sealing water supply and return system of steam feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221275514.4U CN217783743U (en) | 2022-05-25 | 2022-05-25 | Sealing water supply and return system of steam feed pump |
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| Publication Number | Publication Date |
|---|---|
| CN217783743U true CN217783743U (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221275514.4U Active CN217783743U (en) | 2022-05-25 | 2022-05-25 | Sealing water supply and return system of steam feed pump |
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|---|---|
| CN (1) | CN217783743U (en) |
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- 2022-05-25 CN CN202221275514.4U patent/CN217783743U/en active Active
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