CN211836683U - System for double filter screens of water supply pre-pump inlet - Google Patents
System for double filter screens of water supply pre-pump inlet Download PDFInfo
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- CN211836683U CN211836683U CN202020347353.XU CN202020347353U CN211836683U CN 211836683 U CN211836683 U CN 211836683U CN 202020347353 U CN202020347353 U CN 202020347353U CN 211836683 U CN211836683 U CN 211836683U
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Abstract
The utility model discloses a system of double filter screens at the inlet of a water supply pre-pump, which comprises a deaerator, a first filter system, a second filter system and a water supply pre-pump; a water outlet of the deaerator is connected with a water outlet pipe; one port of the water outlet pipe is respectively communicated with the first filtering system and the second filtering system through a tee joint; the tail ends of the first filtering system and the second filtering system are respectively connected to a water supply pipe; install the water supply front pump on the feed pipe, the utility model discloses, through setting up first filtration system, second filtration system to both use in turn, not only guarantee the system of the import double screen of water supply front pump and lead to in the same direction as, when filtration system takes place to block up, need not the shutdown processing moreover.
Description
Technical Field
The utility model relates to a water pump filter screen filters technical field, specifically is a system of leading pump import double screen of feedwater.
Background
At present, only a single steam-driven water supply pump system with 100% BMCR capacity is arranged in a partial thermal power generating set deoxygenation water supply system, and an electric water supply pump is not arranged, so that when the cleanliness of the system is low in a capital construction debugging stage and a normal production process, the filter screen at the inlet of a front pump of the steam-driven water supply pump is easily blocked. When the filter screen is seriously blocked, the cavitation of the water supply pre-pump and the water supply pump can be even caused, the unit is forced to stop, the safety and the economy of the unit are seriously affected, and therefore, the differential pressure of the filter screen of the pre-pump of the water supply pump must be ensured to be at a normal level. When the water supply pump preposition pump of the single steam-driven water supply pump system is only provided with one path of filter screen, the machine can only stop to clean the filter screen when the filter screen is blocked.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: when the filter screen of the feed pump preposition pump of the single steam feed pump system is blocked, the machine can only stop to clean the filter screen.
In order to solve the technical problem, the utility model provides a following technical scheme: a system with double filter screens at the inlet of a water supply pre-pump comprises a deaerator, a first filtering system, a second filtering system and the water supply pre-pump; a water outlet of the deaerator is connected with a water outlet pipe; one port of the water outlet pipe is respectively communicated with the first filtering system and the second filtering system through a tee joint; the tail ends of the first filtering system and the second filtering system are respectively connected to a water supply pipe; and a water supply pre-pump is arranged on the water supply pipe.
The first filtering system and the second filtering system are both communicated with the deaerator and the water supply pre-pump; firstly, starting a first filtering system, and closing a second filtering system; the water discharged from the deaerator flows through the first filtering system, and flows through the water supply pre-pump after being filtered by the first filtering system, so that impurities are prevented from blocking the water supply pre-pump, and the pipeline is ensured to be smooth; when the filtering effect of the first filtering system is reduced, specifically, when the difference between the water pressures in the front pipeline and the rear pipeline of the first filtering system is large, the first filtering system is closed, the second filtering system is started, then the first filtering system is cleaned or replaced, the first filtering system is reserved for standby after being cleaned or replaced, and when the filtering effect of the second filtering system is reduced, the second filtering system is closed, the cleaned or replaced first filtering system is started, and the second filtering system is cleaned or replaced; and a second filtering system is added in front of the feed water pre-pump, so that the first filtering system does not need to be stopped for cleaning when being blocked.
Preferably, the first filtering system comprises a first filtering pipeline and a first filter; one port of the first filtering pipeline is connected to the water outlet pipe through a tee joint; the other port of the first filtering pipeline is connected to a water supply pipe; the first filter is connected into a first filtering pipeline;
the first filtering system also comprises a first front valve and a first rear valve which are respectively arranged at the front end and the rear end of the first filter; the first front valve and the first rear valve are respectively connected to the first filtering pipeline.
Open first preceding valve and first back valve for first filter is through first filtration pipeline and outlet pipe switch-on, and the oxygen-eliminating device discharged water flows through outlet pipe, first filtration pipeline in proper order, and through first filter, under the filtering action of first filter, most impurity of filtering guarantees quality of water, then in water reentrant feedwater front pump, effectively prevents to give water that the front pump takes place to block up.
Preferably, the second filtering system comprises a second filtering pipeline and a second filter; one port of the second filtering pipeline is connected to the water outlet pipe through a tee joint; the other end of the two filter pipelines is arranged on the water supply pipe; the second filter is connected into a second filtering pipeline;
the second filtering system also comprises a second front valve and a second rear valve which are respectively arranged at the front end and the rear end of the second filter; and the second front valve and the second rear valve are respectively connected to the second filtering pipeline.
After the first filter is blocked, closing the first front valve and the first rear valve, then opening the second front valve and the second rear valve, and enabling water discharged by the deaerator to enter a second filtering pipeline through a water outlet pipe, then pass through the second filter, be filtered by the second filter and then enter the water supply preposed pump; the first filter that blocks up is washd or is changed simultaneously to reserve for use, treat that the second filter blocks up the back, change first filter again and use, both use by turns, not only guarantee the system of leading pump import double-screen of feedwater and lead to the well-being, when filtration system takes place to block up, need not to stop the machine and handle moreover.
The first front valve and the first rear valve are opened, so that the first filter is communicated with the water outlet pipe through the first filtering pipeline, water discharged by the deaerator sequentially flows through the water outlet pipe and the first filtering pipeline and passes through the first filter, most impurities are filtered under the filtering action of the first filter, the water quality is ensured, and then the water enters the water supply pre-pump, so that the water supply pre-pump is effectively prevented from being blocked; after the first filter is blocked, closing the first front valve and the first rear valve, then opening the second front valve and the second rear valve, and enabling water discharged by the deaerator to enter a second filtering pipeline through a water outlet pipe, then pass through the second filter, be filtered by the second filter and then enter the water supply preposed pump; the first filter that blocks up is washd or is changed simultaneously to reserve for use, treat that the second filter blocks up the back, change first filter again and use, both use by turns, not only guarantee the system of leading pump import double-screen of feedwater and lead to the well-being, when filtration system takes place to block up, need not to stop the machine and handle moreover.
Preferably, the system for the inlet double-filter screen of the feed water pre-pump further comprises a first sewage discharge system and a second sewage discharge system; one port of the first sewage draining system is connected to the sewage draining port of the first filtering system; the other port of the first sewage disposal system is arranged towards the outside of the plant; a port of the second sewage system is connected to a sewage port of the second filtering system; the other port of the second sewage system is arranged towards the outside of the plant.
The first sewage draining system and the second sewage draining system are respectively connected to the sewage draining ports of the first filtering system and the second filtering system, when the first filtering system or the second filtering system is used, the first sewage draining system or the second sewage draining system is periodically opened, sewage in the first filtering system or the second filtering system is periodically drained, the filtering burden of the first sewage draining system or the second sewage draining system is reduced, the service life of the first filtering system or the second filtering system can be prolonged, and the cleaning and replacing frequency of the first filtering system or the second filtering system is reduced.
Preferably, the first sewage draining system comprises a first sewage draining valve A, a first sewage draining valve B and a first sewage draining pipe; the first sewage discharge A valve and the first sewage discharge B valve are sequentially arranged on the first sewage discharge pipe; one port of the first drain pipe is connected to the drain port of the first filter;
the second sewage discharge system comprises a second sewage discharge A valve, a second sewage discharge B valve and a second sewage discharge pipe; the second blowdown A valve and the second blowdown B valve are sequentially arranged on the second blowdown pipe; and one port of the second sewage discharge pipe is connected to the sewage discharge port of the second filter.
When the first filtering system is started, the first sewage discharge valve A and the first sewage discharge valve B are opened periodically, so that the first sewage discharge pipe is communicated with a sewage discharge port of the first filtering system, and then sewage in the first filtering system is discharged; similarly, when the second filtering system is started, the second blowdown valve A and the second blowdown valve B are periodically arranged, so that the second blowdown pipe is communicated with the second filtering system, and sewage in the second filtering system is discharged; the valve is used for opening and closing the drain pipe, so that the drain pipe is prevented from draining for a long time, the pipe wall of sewage is remained, and the pipeline is blocked after the sewage is dried.
Preferably, a heat exchanger is sleeved outside the water outlet pipe.
The water discharged from the deaerator has high temperature, passes through the heat exchanger through the water outlet pipe, transfers heat away in the heat exchanger, is used for other equipment needing heat, and improves the utilization rate of waste heat; and the temperature of water passing through the heat exchanger is reduced, so that the temperature of a bearing of the water supply pre-pump can be reduced when the water passes through the water supply pre-pump, and the water supply pre-pump is protected by cooling.
Preferably, the ends of the first filtering system and the second filtering system are respectively connected to the water supply pipe through threads.
Compared with the prior art, the beneficial effects of the utility model are that:
A. the first filtering system and the second filtering system are arranged and used in turn, so that the smoothness of a system with double filter screens at the inlet of the water supply pre-pump is ensured, and the shutdown treatment is not needed when the filtering system is blocked;
B. by arranging the first sewage draining system and the second sewage draining system, the service life of the first filtering system or the second filtering system is prolonged, and the cleaning and replacing frequency of the first filtering system or the second filtering system is reduced; the first blowdown A valve, the first blowdown B valve, the second blowdown A valve and the second blowdown B valve are arranged to open and close the first blowdown pipe or the second blowdown pipe, so that the first blowdown pipe or the second blowdown pipe is prevented from being blocked due to long-time opening; through setting up the heat exchanger, will come the heat replacement of deaerator drainage water to move, improve waste heat utilization ratio to hydroenergy after the heat transfer can reduce the bearing temperature of the leading pump of feedwater, plays the effect of cooling protection to the leading pump of feedwater.
Drawings
FIG. 1 is a system diagram of a water supply pre-pump inlet double-screen according to an embodiment of the present invention;
FIG. 2 is a system diagram of a double-strainer at the inlet of a feed water pre-pump according to a second embodiment of the present invention;
fig. 3 is a system diagram of the inlet double-filter screen of the three-feed water pre-pump of the embodiment of the present invention.
Detailed Description
In order to facilitate the understanding of the technical solutions of the present invention by those skilled in the art, the technical solutions of the present invention will now be further described with reference to the drawings attached to the specification.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
Referring to fig. 1, the embodiment discloses a system of a double filter screens at an inlet of a feed water pre-pump, which includes a deaerator 1, a first filter system 2, a second filter system 3 and a feed water pre-pump 6. The water outlet of the deaerator 1 is connected with a water outlet pipe through threads. And one port of the water outlet pipe is respectively communicated with the first filtering system 2 and the second filtering system 3 through a tee joint. The tail ends of the first filtering system 2 and the second filtering system 3 are respectively connected to a water supply pipe through threads. And a water supply pre-pump 6 is arranged on the water supply pipe through a flange.
The first filtering system 2 and the second filtering system 3 are communicated with the deaerator 1 and the water supply pre-pump 6; firstly, the first filtering system 2 is started, and the second filtering system 3 is closed; the water discharged from the deaerator 1 flows through the first filtering system 2, and flows through the water supply pre-pump 6 after being filtered by the first filtering system 2, so that impurities are prevented from blocking the water supply pre-pump 6, and the pipeline is ensured to be smooth; when the filtering effect of the first filtering system 2 is reduced, specifically, when the difference between the water pressures in the front pipeline and the rear pipeline of the first filtering system 2 is large, the first filtering system 2 is closed, the second filtering system 3 is started, then the first filtering system 2 is cleaned or replaced until the first filtering system is cleaned or replaced, the first filtering system is reserved for standby, when the filtering effect of the second filtering system 3 is reduced, the second filtering system 3 is closed, the cleaned or replaced first filtering system 2 is started, and the second filtering system 3 is cleaned or replaced; the second filtering system 3 is added in front of the feed water pre-pump 6, and when the first filtering system 2 is blocked, the first filtering system does not need to be stopped for cleaning.
The first filter system 2 comprises a first filter line, a first filter 22. And one port of the first filtering pipeline is connected to the water outlet pipe through a tee joint. The other end of the first filtering pipeline is connected to the water supply pipe through threads. The first filter 22 is connected to the first filter line by a flanged pipe.
The first filtering system 2 further comprises a first front valve 21 and a first rear valve 23 respectively disposed at the front and rear ends of the first filter 22. The first front valve 21 and the first rear valve 23 are respectively connected to the first filtering pipeline through threads.
Open first preceding valve 21 and first back valve 23 for first filter 22 is through first filtration pipeline and outlet pipe switch-on, and the water that oxygen-eliminating device 1 discharged flows through outlet pipe, first filtration pipeline in proper order, and through first filter 22, under the filtering action of first filter 22, most impurity of filtering guarantees quality of water, then in water reentrant feedwater preliminary pump 6, prevents effectively that feedwater preliminary pump 6 from taking place to block up.
The second filter system 3 comprises a second filter line, a second filter 32. And one port of the second filtering pipeline is connected to the water outlet pipe through a tee joint. The other end of the two filter pipelines is connected to the water supply pipe through threads. The second filter 32 is connected to the second filter line by a flange pipe.
The second filtering system 3 further comprises a second front valve 31 and a second rear valve 33 respectively disposed at the front and rear ends of the second filter 32. The second front valve 31 and the second rear valve 33 are respectively connected to the second filtering pipeline through threads.
After the first filter 22 is blocked, the first front valve 21 and the first rear valve 23 are closed, the second front valve 31 and the second rear valve 33 are opened, water discharged by the deaerator 1 enters a second filtering pipeline through a water outlet pipe, then passes through the second filter 32, is filtered by the second filter 32, and then enters the water supply pre-pump 6; the first filter 22 that blocks up is washd or changed simultaneously to reserve for use, after second filter 32 blocks up, change first filter 22 again and use, both use by turns, not only guarantee the system of leading pump import double screen of feedwater and lead to the well-being, when filtration system takes place to block up, need not to stop the machine and handle moreover.
The working principle is as follows: the first front valve 21 and the first rear valve 23 are opened, so that the first filter 22 is communicated with the water outlet pipe through a first filtering pipeline, water discharged by the deaerator 1 sequentially flows through the water outlet pipe and the first filtering pipeline and passes through the first filter 22, most impurities are filtered under the filtering action of the first filter 22, the water quality is ensured, and then the water enters the water supply pre-pump 6, so that the water supply pre-pump 6 is effectively prevented from being blocked; after the first filter 22 is blocked, the first front valve 21 and the first rear valve 23 are closed, the second front valve 31 and the second rear valve 33 are opened, water discharged by the deaerator 1 enters a second filtering pipeline through a water outlet pipe, then passes through the second filter 32, is filtered by the second filter 32, and then enters the water supply pre-pump 6; the first filter 22 that blocks up is washd or changed simultaneously to reserve for use, after second filter 32 blocks up, change first filter 22 again and use, both use by turns, not only guarantee the system of leading pump import double screen of feedwater and lead to the well-being, when filtration system takes place to block up, need not to stop the machine and handle moreover.
Example two
Referring to fig. 2, the system for the inlet double-screen of the feed water pre-pump further comprises a first sewage system 4 and a second sewage system 5. A port of the first sewage system 4 is screwed into the sewage port of the first filter system 2. The other port of the first sewage system 4 is disposed toward the outside of the plant. And one port of the second sewage system 5 is connected to the sewage port of the second filtering system 3 through threads. The other port of the second sewage system 5 is disposed toward the outside of the plant.
The first sewage draining system 4 and the second sewage draining system 5 are respectively connected to the sewage discharging ports of the first filtering system 2 and the second filtering system 3, when the first filtering system 2 or the second filtering system 3 is used, the first sewage draining system 4 or the second sewage draining system 5 is periodically opened, sewage in the first filtering system 2 or the second filtering system 3 is periodically discharged, the filtering burden of the first sewage draining system 4 or the second sewage draining system 5 is reduced, the service life of the first filtering system 2 or the second filtering system 3 can be prolonged, and the cleaning and replacing frequency of the first filtering system 2 or the second filtering system 3 is reduced.
The first sewage system 4 includes a first sewage a valve 41, a first sewage B valve 42, and a first sewage pipe 43. The first sewage discharge a valve 41 and the first sewage discharge B valve 42 are sequentially flange-mounted on the first sewage discharge pipe 43. One port of the first drain pipe 43 is screwed to the drain port of the first filter 22.
The second sewage system 5 includes a second sewage a valve 51, a second sewage B valve 52 and a second sewage pipe 53. The second blowdown A valve 51 and the second blowdown B valve 52 are sequentially arranged on the second blowdown pipe 53 through flanges. One port of the second soil discharge pipe 53 is screw-coupled to the soil discharge port of the second filter 32.
When the first filtering system 2 is started, the first sewage discharge valve a 41 and the first sewage discharge valve B42 are periodically opened, so that the first sewage discharge pipe 43 is communicated with the sewage discharge port of the first filtering system 2, and then the sewage in the first filtering system 2 is discharged; similarly, when the second filtering system 3 is opened, the second blowdown valve A51 and the second blowdown valve B52 are periodically opened, so that the second blowdown pipe 53 is communicated with the second filtering system 3 to discharge the sewage in the second filtering system 3; the valve is used for opening and closing the drain pipe, so that the drain pipe is prevented from draining for a long time, the pipe wall of sewage is remained, and the pipeline is blocked after the sewage is dried.
EXAMPLE III
Referring to fig. 3, a heat exchanger 9 is fixedly sleeved outside the water outlet pipe through a bolt.
The water discharged from the deaerator 1 has high temperature, passes through the heat exchanger 9 through the water outlet pipe, transfers heat away in the heat exchanger 9, is used in other equipment needing heat, and improves the utilization rate of waste heat; the temperature of the water passing through the heat exchanger 9 is reduced, so that the bearing temperature of the water feeding pre-pump 6 can be reduced when the water passes through the water feeding pre-pump 6, and the effect of temperature reduction protection on the water feeding pre-pump 6 is achieved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The above embodiments only show the embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and for those skilled in the art, a plurality of modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides a system of two filter screens of feed water pre-pump import which characterized in that: the system comprises a deaerator, a first filtering system, a second filtering system and a water supply pre-pump; a water outlet of the deaerator is connected with a water outlet pipe; one port of the water outlet pipe is respectively communicated with the first filtering system and the second filtering system through a tee joint; the tail ends of the first filtering system and the second filtering system are respectively connected to a water supply pipe; and a water supply pre-pump is arranged on the water supply pipe.
2. A system of double screens for feed water pre-pump inlets as claimed in claim 1 wherein: the first filtering system comprises a first filtering pipeline and a first filter; one port of the first filtering pipeline is connected to the water outlet pipe through a tee joint; the other port of the first filtering pipeline is connected to a water supply pipe; the first filter is connected into a first filtering pipeline;
the first filtering system also comprises a first front valve and a first rear valve which are respectively arranged at the front end and the rear end of the first filter; the first front valve and the first rear valve are respectively connected to the first filtering pipeline.
3. A system of double screens for feed water pre-pump inlets as claimed in claim 2 wherein: the second filtering system comprises a second filtering pipeline and a second filter; one port of the second filtering pipeline is connected to the water outlet pipe through a tee joint; the other end of the two filter pipelines is arranged on the water supply pipe; the second filter is connected into a second filtering pipeline;
the second filtering system also comprises a second front valve and a second rear valve which are respectively arranged at the front end and the rear end of the second filter; and the second front valve and the second rear valve are respectively connected to the second filtering pipeline.
4. A system of double screens for feed water pre-pump inlets as claimed in claim 1 wherein: the system for the water supply pre-pump inlet double-filter screen further comprises a first sewage discharge system and a second sewage discharge system; one port of the first sewage draining system is connected to the sewage draining port of the first filtering system; the other port of the first sewage disposal system is arranged towards the outside of the plant; a port of the second sewage system is connected to a sewage port of the second filtering system; the other port of the second sewage system is arranged towards the outside of the plant.
5. The system of claim 4 for a feedwater booster pump inlet double screen, wherein: the first sewage disposal system comprises a first sewage disposal A valve, a first sewage disposal B valve and a first sewage disposal pipe; the first sewage discharge A valve and the first sewage discharge B valve are sequentially arranged on the first sewage discharge pipe; one port of the first drain pipe is connected to the drain port of the first filter;
the second sewage discharge system comprises a second sewage discharge A valve, a second sewage discharge B valve and a second sewage discharge pipe; the second blowdown A valve and the second blowdown B valve are sequentially arranged on the second blowdown pipe; and one port of the second sewage discharge pipe is connected to the sewage discharge port of the second filter.
6. A system of double screens for feed water pre-pump inlets as claimed in claim 1 wherein: and a heat exchanger is sleeved outside the water outlet pipe.
7. A system of double screens for feed water pre-pump inlets as claimed in claim 1 wherein: the tail ends of the first filtering system and the second filtering system are respectively connected to the water supply pipe through threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020347353.XU CN211836683U (en) | 2020-03-19 | 2020-03-19 | System for double filter screens of water supply pre-pump inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020347353.XU CN211836683U (en) | 2020-03-19 | 2020-03-19 | System for double filter screens of water supply pre-pump inlet |
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| Publication Number | Publication Date |
|---|---|
| CN211836683U true CN211836683U (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020347353.XU Expired - Fee Related CN211836683U (en) | 2020-03-19 | 2020-03-19 | System for double filter screens of water supply pre-pump inlet |
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| CN (1) | CN211836683U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623638A (en) * | 2021-08-16 | 2021-11-09 | 京能十堰热电有限公司 | RB-capable boiler deoxygenation water supply system with single 100% steam-driven water supply pump and control method |
| CN114644408A (en) * | 2022-04-02 | 2022-06-21 | 淮河能源电力集团有限责任公司 | Water supply anti-blocking system |
-
2020
- 2020-03-19 CN CN202020347353.XU patent/CN211836683U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113623638A (en) * | 2021-08-16 | 2021-11-09 | 京能十堰热电有限公司 | RB-capable boiler deoxygenation water supply system with single 100% steam-driven water supply pump and control method |
| CN114644408A (en) * | 2022-04-02 | 2022-06-21 | 淮河能源电力集团有限责任公司 | Water supply anti-blocking system |
| CN114644408B (en) * | 2022-04-02 | 2023-11-28 | 淮河能源电力集团有限责任公司 | Water supply anti-blocking system |
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Granted publication date: 20201103 |