CN115445299A - Nuclear power plant main pump shaft seal water riser rotates and inhales out corrosion product eduction gear - Google Patents
Nuclear power plant main pump shaft seal water riser rotates and inhales out corrosion product eduction gear Download PDFInfo
- Publication number
- CN115445299A CN115445299A CN202210975681.8A CN202210975681A CN115445299A CN 115445299 A CN115445299 A CN 115445299A CN 202210975681 A CN202210975681 A CN 202210975681A CN 115445299 A CN115445299 A CN 115445299A
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- China
- Prior art keywords
- sewage
- pipe
- main pump
- filter screen
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000005260 corrosion Methods 0.000 title claims abstract description 33
- 230000007797 corrosion Effects 0.000 title claims abstract description 33
- 239000010865 sewage Substances 0.000 claims abstract description 77
- 238000007599 discharging Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 13
- 239000010963 304 stainless steel Substances 0.000 claims description 3
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 8
- 239000002826 coolant Substances 0.000 description 3
- 241000295146 Gallionellaceae Species 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to the field of shaft seal water purification, and particularly relates to a rotary suction type corrosion product discharging device for a main pump shaft seal water vertical pipe of a nuclear power plant. Comprises a filter screen, a sewage suction pipe, a clamping sleeve, a sewage discharge pipe and a shell; the filter screen card is arranged in the shell, one side of the filter screen is tightly attached with a sewage suction head, a sewage discharge pipe is inserted in the sewage suction pipe, and a clamping sleeve is sleeved outside the joint of the sewage suction pipe and the sewage discharge pipe. The invention has the beneficial effects that: this rotatory suction formula corrosion products eduction gear of main pump bearing seal water riser is through setting up the filter screen interception corrosion products in flow orifice plate front side for it must be through filterable water to flow out the device and go to the tertiary bearing seal of main pump, has guaranteed the quality of bearing seal water. By utilizing the design of the rotary sewage suction pipe, the cleaning of the filter screen and the high-efficiency filtering performance of the whole device are ensured while the corrosive products in water are discharged. The device can complete the filtering and washing functions as long as water flow exists without external force, and is simple and reliable.
Description
Technical Field
The invention belongs to the field of shaft seal water purification, and particularly relates to a rotary suction type corrosion product discharging device for a main pump shaft water sealing vertical pipe of a nuclear power plant.
Background
The reactor coolant pump, i.e. the main pump, is one of the key devices of a nuclear power plant, the heart of which is the plant. It forces the coolant in a loop to circulate, thus transferring the heat energy generated in the reactor to a steam generator to generate steam to drive a turbine to do work. Therefore, the normal and stable operation of the main pump is the basis for power generation of the power plant, and if the main pump is frequently started and stopped, huge economic loss can be caused to the power plant.
The shaft seal is an important component of the main pump, is the key for the normal operation of the main pump, is a device for controlling the leakage of the reactor coolant along the shaft of the main pump, and consists of three stages of seal main parts of NO.1, NO.2 and NO.3 which are arranged in series, and the service life of the shaft seal determines the maintenance period of the main pump. The third stage shaft seal is used for lubricating the shaft seal surface and preventing boron from separating out by injecting sealing water, and the sealing water injected by the third stage shaft seal is from the shaft seal stand pipe. The normal operation of the third-stage shaft seal is ensured, and the shaft seal vertical pipe is required to smoothly and stably supply water. The situation that a flow orifice plate of a multiple shaft seal vertical pipe is blocked by a microbial corrosion product recently happens in a certain nuclear power plant, so that the water supply is insufficient, and the normal operation of a pump is influenced. Although the shaft seal water is demineralized water, because a balance pipe is arranged on the vertical pipe and is connected with the atmosphere to balance the air pressure in the vertical pipe, the interior of the vertical pipe is directly communicated with the atmosphere, so that a large amount of air is dissolved in the water, the content of bacteria and oxygen in the water is continuously increased, and the pig iron bacteria are easily collected in the vertical pipe. The iron bacteria can convert ferrous ions into ferric ions to generate a large amount of corrosion products which are insoluble in water, and the corrosion products are aggregated at the position of the flow orifice plate after passing through the pipeline to cause pipeline blockage, so that the normal operation of the main pump is influenced.
Therefore, in order to solve the problem of blockage of the flow orifice plate of the vertical pipe during the normal operation of the unit, the invention is urgently needed to provide a corrosion product discharge device which can discharge the generated corrosion products while ensuring the stable supply of the shaft seal water and ensure the normal operation of the pump.
Disclosure of Invention
The invention aims to provide a rotary suction type corrosion product discharging device for a main pump shaft seal water vertical pipe of a nuclear power plant, which is used for discharging corrosion products generated in a shaft seal vertical pipe by arranging the discharging device on the front side of a flow orifice plate so as to solve the problem that the flow orifice plate is blocked.
The technical scheme of the invention is as follows: a rotary suction type corrosion product discharging device of a main pump shaft seal water vertical pipe of a nuclear power plant comprises a filter screen, a sewage suction pipe, a clamping sleeve, a sewage discharge pipe and a shell; the filter screen card is arranged in the shell, one side of the filter screen is tightly attached with a sewage suction head, a sewage discharge pipe is inserted in the sewage suction pipe, and a cutting sleeve is sleeved at the joint of the sewage suction pipe and the sewage discharge pipe.
The sewage suction pipe comprises a sewage suction head, an impeller, a sleeve and a convex block, wherein one end of the sewage suction head is connected with the sleeve, the convex block is arranged outside the sleeve, and the impeller is sleeved on the sleeve.
The cutting ferrule comprises two semicircular structures, and the inner side of each semicircular structure comprises a groove and a protruding part.
The sewage discharge pipe comprises a sleeve pipe, and a groove is formed in the sleeve pipe.
The sewage suction head is tightly attached to the surface of the filter screen, and the sleeve of the sewage discharge pipe is inserted into the sleeve of the sewage suction pipe.
The groove and the convex part on the inner side of the clamping sleeve are respectively matched with the convex block of the sewage suction pipe and the groove of the sewage discharge pipe, and the clamping and fixing connection effects are achieved.
The shell is of a cylindrical structure.
The filter screen, the sewage suction pipe, the clamping sleeve, the sewage discharge pipe and the shell are all made of 304 stainless steel.
The sewage suction head is of an integrated structure, one end of the sewage suction head is in a flat opening form, the flat opening form is attached to the filter screen, the other end of the sewage suction head is in a circular tube form, and the end, provided with the circular tube structure, of the sewage suction head is connected with the sleeve.
The filter screen is of a disc-shaped structure.
The invention has the beneficial effects that: this rotatory suction formula corrosion products eduction gear of main pump bearing seal water riser is through setting up the filter screen interception corrosion products in flow orifice plate front side for it must be through filterable water to flow out the device and go to the tertiary bearing seal of main pump, has guaranteed the quality of bearing seal water. By utilizing the design of the rotary sewage suction pipe, the cleanness of the filter screen and the high-efficiency filtering performance of the whole device are ensured while the corrosion products in water are discharged. The device can complete the filtering and flushing functions as long as water flow exists without external force, and is simple and reliable.
Drawings
FIG. 1 is a schematic view of a rotary suction-type corrosion product discharging device for a main pump shaft-sealed water riser of a nuclear power plant according to the present invention;
FIG. 2 is a schematic view of a structure of a soil pick-up pipe;
fig. 3 is a schematic view of a ferrule structure;
FIG. 4 is a schematic view of a blow-off pipe structure;
fig. 5 is a schematic use view of a rotary suction type corrosion product discharging device of a main pump shaft seal water riser of a nuclear power plant according to the present invention.
In the figure: 1 filter screen, 2 sewage pipes, 3 cutting ferrule, 4 blow off pipes, 5 casings, 6 bearing seal water supply pipe, 7 flow orifice plates, 21 sewage suction heads, 22 impellers, 23 sleeves, 24 lugs, 31 grooves, 32 bulges, 41 sleeves and 42 grooves.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, the rotary suction type corrosion product discharging device for the main pump shaft sealing water vertical pipe of the nuclear power plant comprises a filter screen 1, a sewage suction pipe 2, a cutting sleeve 3, a sewage discharge pipe 4 and a shell 5. Casing 5 be the tubular structure, discoid filter screen 1 clamps inside casing 5, fixed connection between filter screen 1 and the casing 5, one side of filter screen 1 is hugged closely and is had soil pick-up head 2, plug-in blowdown pipe 4 in the blowdown pipe 2, the cutting ferrule 3 is equipped with to the junction overcoat of blowdown pipe 2 and blowdown pipe 4. The filter screen 1, the sewage suction pipe 2, the clamping sleeve 3, the sewage discharge pipe 4 and the shell 5 are all made of 304 stainless steel.
As shown in fig. 2, the soil pick-up pipe includes a soil pick-up head 21, an impeller 22, a sleeve 23, and a projection 24. The sewage suction head 21 is of an integrated structure, one end of the sewage suction head is in a flat opening form, the flat opening form is attached to the filter screen 1, the other end of the sewage suction head 21 is in a circular tube form, one end of the sewage suction head 21 with the circular tube structure is connected with the sleeve 23, the sleeve 23 is externally provided with the convex block 24, and the sleeve 23 is sleeved with the impeller 22.
As shown in fig. 3, the ferrule 3 comprises two semi-circular structures, each of which comprises a recess 31 and a protrusion 32 on the inside.
As shown in fig. 4, the soil pipe 4 includes a sleeve 41, and a groove 42 is provided on the sleeve 41.
Wherein, the soil pick-up head 21 hugs closely the filter screen 1 surface, and the sleeve pipe 41 of blow off pipe inserts in the sleeve pipe 23 of soil pick-up pipe 2, and both have certain length and closely cooperate and form when sealed soil pick-up pipe also can rotate round the blow off pipe. The groove 31 and the bulge 32 on the inner side of the cutting sleeve are respectively matched with the sewage suction pipe lug 24 and the sewage discharge pipe groove 42 to play a role in clamping and fixing connection. During normal operation, shaft seal water enters from the sewage discharge pipe side and flows out from the filter screen side after being filtered by the filter screen, and the shaft seal water pushes the sewage suction pipe impeller 22 and drives the whole sewage suction pipe to rotate in the flowing process. Because the sewage suction head 21 is tightly attached to the filter screen, the sewage suction pipe is connected with the sewage discharge pipe in an opposite air, and a small part of water flow filtered by the sewage suction head 21 is sucked out. The filter screen is washed by water flow while water is absorbed, and the washed corrosion products and the like are taken out of the system through a channel consisting of a sewage suction pipe and a sewage discharge pipe. The rotation of the sewage suction pipe completes the cleaning and sewage discharge of the integral filter screen.
As shown in fig. 5, the process of the present invention is as follows:
the pipeline at the upstream of the flow orifice plate is cut off, and the filter screen side of the device is connected with the near flow orifice plate side. Then the sewage discharge pipe side of the device is connected with a shaft seal water supply pipeline. Finally, the corrosion product discharge port is connected to a nearby wastewater collection pit, and the installation of the device is completed. When the device is used, the device automatically starts to work as long as shaft seal water flows through the device, and the shaft seal water is filtered and impurities and corrosion products are discharged.
Claims (10)
1. The utility model provides a rotatory formula corrosion product eduction gear that draws of main pump shaft seal water riser of nuclear power plant which characterized in that: comprises a filter screen, a sewage suction pipe, a clamping sleeve, a sewage discharge pipe and a shell; the filter screen card is arranged in the shell, one side of the filter screen is tightly attached with a sewage suction head, a sewage discharge pipe is inserted in the sewage suction pipe, and a cutting sleeve is sleeved at the joint of the sewage suction pipe and the sewage discharge pipe.
2. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 1, wherein: the sewage suction pipe comprises a sewage suction head, an impeller, a sleeve and a convex block, wherein one end of the sewage suction head is connected with the sleeve, the convex block is arranged outside the sleeve, and the impeller is sleeved on the sleeve.
3. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 1, wherein: the cutting ferrule comprises two semicircular structures, and the inner side of each semicircular structure comprises a groove and a protruding part.
4. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 2, wherein: the sewage discharge pipe comprises a sleeve pipe, and a groove is formed in the sleeve pipe.
5. The rotary suction type corrosion product discharging device for the main pump shaft sealing water vertical pipe of the nuclear power plant as claimed in claim 4, wherein: the sewage suction head is tightly attached to the surface of the filter screen, and the sleeve of the sewage discharge pipe is inserted into the sleeve of the sewage suction pipe.
6. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 3, wherein: the groove and the convex part on the inner side of the clamping sleeve are respectively matched with the convex block of the sewage suction pipe and the groove of the sewage discharge pipe, and the clamping and fixing connection effects are achieved.
7. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 1, wherein: the shell is of a cylindrical structure.
8. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 1, wherein: the filter screen, the sewage suction pipe, the clamping sleeve, the sewage discharge pipe and the shell are all made of 304 stainless steel.
9. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 2, wherein: the sewage suction head is of an integrated structure, one end of the sewage suction head is in a flat opening form, the flat opening form is attached to the filter screen, the other end of the sewage suction head is in a circular tube form, and the end, provided with the circular tube structure, of the sewage suction head is connected with the sleeve.
10. The rotary suction type corrosion product discharging device for the main pump shaft sealing water riser of the nuclear power plant as claimed in claim 1, wherein: the filter screen is of a disc-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210975681.8A CN115445299A (en) | 2022-08-15 | 2022-08-15 | Nuclear power plant main pump shaft seal water riser rotates and inhales out corrosion product eduction gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210975681.8A CN115445299A (en) | 2022-08-15 | 2022-08-15 | Nuclear power plant main pump shaft seal water riser rotates and inhales out corrosion product eduction gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115445299A true CN115445299A (en) | 2022-12-09 |
Family
ID=84298656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210975681.8A Pending CN115445299A (en) | 2022-08-15 | 2022-08-15 | Nuclear power plant main pump shaft seal water riser rotates and inhales out corrosion product eduction gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115445299A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289048A (en) * | 2013-07-17 | 2015-01-21 | 际华三五四二纺织有限公司 | Disk filter hairbrush suction nozzle apparatus |
| CN107549330A (en) * | 2017-09-26 | 2018-01-09 | 龙里县兴溢诚豆制品有限公司 | A kind of Tofu processing is filtered from trash discharging apparatus with soya-bean milk suede slag |
| CN212417263U (en) * | 2020-05-29 | 2021-01-29 | 武汉奥莱机电设备有限公司 | A filter equipment for sewage treatment |
| CN212680308U (en) * | 2020-07-01 | 2021-03-12 | 山东佑坤能源设备有限公司 | Novel both ends of positive displacement copper pipe heat exchanger filter device |
| CN212998775U (en) * | 2020-06-17 | 2021-04-20 | 谷玥 | Filter equipment for municipal administration water supply and drainage |
| CN214618500U (en) * | 2021-04-28 | 2021-11-05 | 青海凯德力管道工程有限公司 | Winding pipe with anti-blocking function |
-
2022
- 2022-08-15 CN CN202210975681.8A patent/CN115445299A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289048A (en) * | 2013-07-17 | 2015-01-21 | 际华三五四二纺织有限公司 | Disk filter hairbrush suction nozzle apparatus |
| CN107549330A (en) * | 2017-09-26 | 2018-01-09 | 龙里县兴溢诚豆制品有限公司 | A kind of Tofu processing is filtered from trash discharging apparatus with soya-bean milk suede slag |
| CN212417263U (en) * | 2020-05-29 | 2021-01-29 | 武汉奥莱机电设备有限公司 | A filter equipment for sewage treatment |
| CN212998775U (en) * | 2020-06-17 | 2021-04-20 | 谷玥 | Filter equipment for municipal administration water supply and drainage |
| CN212680308U (en) * | 2020-07-01 | 2021-03-12 | 山东佑坤能源设备有限公司 | Novel both ends of positive displacement copper pipe heat exchanger filter device |
| CN214618500U (en) * | 2021-04-28 | 2021-11-05 | 青海凯德力管道工程有限公司 | Winding pipe with anti-blocking function |
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