CN215952338U - Disassembly-free backwashing structure and closed water heat exchanger - Google Patents
Disassembly-free backwashing structure and closed water heat exchanger Download PDFInfo
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- CN215952338U CN215952338U CN202121792042.5U CN202121792042U CN215952338U CN 215952338 U CN215952338 U CN 215952338U CN 202121792042 U CN202121792042 U CN 202121792042U CN 215952338 U CN215952338 U CN 215952338U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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Abstract
The utility model discloses a disassembly-free backwashing structure and a closed water heat exchanger, which comprise a cooling water inlet pipe and a cooling water outlet pipe, wherein an outlet of the cooling water inlet pipe and an inlet of the cooling water outlet pipe are both used for being connected with the water heat exchanger, a first electric door is arranged on the cooling water inlet pipe, a second electric door is arranged on the cooling water outlet pipe, a first backwashing water inlet branch pipe is connected between the second electric door and the inlet of the cooling water outlet pipe, an outlet of the first backwashing water inlet branch pipe is connected with the cooling water outlet pipe, a backwashing water outlet branch pipe is connected between the first electric door and the outlet of the cooling water inlet pipe, and an inlet of the backwashing water outlet branch pipe is connected with the cooling water inlet pipe. The utility model reduces the damage of the equipment caused by disassembly, maintenance and cleaning, and is beneficial to prolonging the service life of the equipment; and the investment of manpower resources for maintenance is reduced, and the investment of manpower cost is reduced.
Description
Technical Field
The utility model belongs to the technical field of water heat exchangers, and particularly belongs to a disassembly-free backwashing structure and a closed water heat exchanger.
Background
The plate heat exchanger is a novel efficient and compact heat exchanger which has been developed and widely used in recent decades. It is formed by stacking a series of parallel thin metal plates having corrugated surfaces. The heat exchanger has the characteristics of small occupied area, higher heat transfer coefficient, less manufacturing consumed materials, low manufacturing cost and less consumption of running cooling water. Therefore, the closed water heat exchanger is widely selected from the options of the closed water heat exchanger of the power plant.
However, the plate-type closed water heat exchanger has a high requirement on cooling water quality due to the narrow heat exchange flow channel, and a general power plant adopts a mode of additionally arranging a filtering device in front of the heat exchanger to improve the quality of primary cooling water, but can only prolong the blocking occurrence time and cannot completely prevent the blocking occurrence. Therefore, the plate heat exchanger needs to be disassembled and cleaned regularly, and has the following structural characteristics: to prevent leakage of the operating fluid and leakage between the two fluids, the plate heat exchanger must have a sealing gasket. The sealing ring needs to bear the influence of pressure and temperature change in operation, and is corroded by working fluid, so that leakage is avoided, and frequent disassembly and cleaning further aggravate the leakage possibility of the heat exchanger.
At present, medium-plate closed water heat exchangers in a plurality of enterprises adopt cooling water as seawater, are taken from a circulating water inlet pipe of a condenser, are pressurized by a booster pump, and are filtered by an electric water filter to enter the closed water heat exchangers. The aperture of the filter screen of the electric water filter is 1.5mm, and large-particle impurities in the seawater for cooling can be effectively filtered. But the sand and silt with the diameter less than 1.5mm in the seawater can still enter the closed water heat exchanger through the electric water filter. After the closed water heat exchanger operates for a long period, the sludge and fine sand particles are deposited between the heat exchange plates, so that the heat exchange efficiency is reduced, and the temperature of the closed water is increased. Especially, in the peak period of power consumption in summer, the demand for closed water is larger due to higher environmental temperature and full-load operation of a unit, and a large amount of seawater is needed by the heat exchanger to cool the closed water, so that the deposition of silt and sand is accelerated, and the blockage of a cooler is easy to occur. Although two closed water heat exchangers are adopted in design, one closed water heat exchanger is equipped with one heat exchanger, the blocked heat exchanger can be switched to be washed, too many disassembly and assembly washing operations greatly increase the burden of maintainers, and the leakage occurrence probability of the closed water heat exchanger is also increased. Meanwhile, the load reduction operation condition of the unit caused by the blockage of the closed water heat exchanger also occurs for many times in the high load period in summer, and the economic benefit of an enterprise is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a disassembly-free backwashing structure and a closed water heat exchanger, which solve the problems that the existing water heat exchanger is easy to block, needs to be disassembled, assembled and washed for many times, greatly increases the burden of maintainers, increases the leakage occurrence probability of the water heat exchanger and influences the economic benefit of enterprises.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a back flush structure of exempting from to dismantle, includes cooling water inlet tube and cooling water outlet pipe, the export of cooling water inlet tube and the entry of cooling water outlet pipe all are used for connecting the water heat exchanger, be equipped with first electrically operated gate on the cooling water inlet tube, be equipped with the second electrically operated gate on the cooling water outlet pipe, be connected with first back flush branch pipe of intaking between the entry of second electrically operated gate and cooling water outlet pipe, the export and the cooling water outlet pipe connection of branch pipe are intake in first back flush, be connected with back flush branch pipe of going out between the export of first electrically operated gate and cooling water inlet tube, the entry and the cooling water inlet pipe connection of back flush branch pipe of going out.
Furthermore, be connected with first manual door on the first back flush branch pipe of intaking, first manual door is used for opening or closes first back flush branch pipe of intaking.
Furthermore, still be connected with the manual door of second on the first back flush branch pipe of intaking, the manual door of second and first manual door are established ties, are connected with the manometer between first manual door and the manual door of second, the manometer is arranged in the pressure of the back flush water of monitoring first back flush branch pipe inner chamber of intaking.
Furthermore, the inlet of the first backwash water inlet branch pipe is connected with a backwash water source, and the backwash water source is fire-fighting water.
Furthermore, a third manual door is arranged on the backwashing water outlet branch pipe and used for opening or closing the backwashing water outlet branch pipe.
Furthermore, the back washing water outlet branch pipe is arranged on the precipitation side of the cooling water outlet pipe.
Furthermore, the first backwash water inlet branch pipe and the backwash water outlet branch pipe are respectively connected to the cooling water outlet pipe and the cooling water inlet pipe through welding.
Further, be connected with the back flush branch pipe of intaking of second on the cooling water inlet tube, the export and the cooling water outlet pipe connection of branch pipe are intake in the back flush of second, the entry of branch pipe is intake in the back flush of second arranges between first electrically operated gate and cooling water inlet tube entry, the export of branch pipe is intake in the back flush of second arranges between the entry of second electrically operated gate and cooling water outlet pipe.
Furthermore, a fourth manual door is arranged on the second backwashing water inlet branch pipe.
The utility model also provides a closed water heat exchanger which comprises a closed water heat exchanger body and the disassembly-free backwashing structure, wherein a cooling water inlet of the closed water heat exchanger body is connected with an outlet of a cooling water inlet pipe, and a cooling water outlet of the closed water heat exchanger body is connected with an inlet of a cooling water outlet pipe.
Compared with the prior art, the utility model has at least the following beneficial effects:
the utility model provides a disassembly-free backwashing structure, wherein a backwashing water outlet branch pipe and a first backwashing water inlet branch pipe are respectively arranged on a cooling water inlet and outlet pipe, a backwashing water source is introduced into the first backwashing water inlet branch pipe, the backwashing direction of the backwashing water source is opposite to the flowing direction of cooling water, so that impurities deposited on a water heat exchanger, a cooling water inlet pipe and a cooling water outlet pipe can be impacted, and the impurities are carried out. The technical transformation is completed only by adding a branch pipe on each inlet pipe and outlet pipe of the cooling water and adding a manual door on the branch pipe for system isolation. The original equipment is not required to be damaged and rebuilt in structure and construction, and the characteristics of small volume, high heat exchange efficiency and the like of the original equipment are reserved. The modification cost is low. The back washing operation is simple, and the disintegration and cleaning period of the closed water heat exchanger is greatly prolonged. The damage of the equipment caused by disassembly, maintenance and cleaning is reduced, and the service life of the equipment is prolonged; and the investment of manpower resources for maintenance is reduced, and the investment of manpower cost is reduced.
Furthermore, a first manual door is connected to the first backwash water inlet branch pipe and used for opening or closing the first backwash water inlet branch pipe to enable backwash water sources to enter the first backwash water inlet branch pipe. The frequency of disassembly and assembly cleaning of the heat exchanger is reduced, equipment damage caused by disassembly and assembly is reduced, workload of maintainers is reduced, and labor cost is lowered.
Furthermore, a pressure gauge is arranged between the first manual door and the second manual door, the second manual door can be opened, the first manual door is closed, the pressure of backwashing water in the first backwashing water inlet branch pipe is monitored through the pressure gauge, the pressure of the flushing water is lower than that of closed water, leakage is prevented, closed water is polluted, and the first manual door is opened after the pressure is proper.
Furthermore, the first manual door, the second manual door and the third manual door can be matched with each other to open or close the whole backwashing structure at any time, so that the backwashing structure can meet the closed water requirement of the unit by two heat exchangers at any time, the loading capacity of the unit is improved, and the economic benefit of the unit is ensured. After the improved closed water heat exchanger is put into operation, the requirement of the unit on closed water is basically met by the alternate back flushing operation mode of the two closed water heat exchangers. Especially under the high unit load condition of high temperature in summer, closed water temperature still can satisfy the unit operation requirement, no longer takes place because of the high condition that causes the load of closed water temperature to be limited. Greatly improves the economic benefits of unit operation and ensures the unit operation safety.
Furthermore, the back washing water outlet branch pipe is arranged on the precipitation side of the cooling water inlet pipe, so that the sediment silt can be discharged more conveniently.
Furthermore, the cold water inlet pipe is directly connected with the second backwashing water inlet branch pipe, and the backwashing water inlet pipe has the characteristics of simple operation and good backwashing effect. Because the back washing pipeline is a fixed pipeline, connection operation is not needed, and only the fourth manual door and the third manual door need to be operated during back washing; the backwashing water source adopts cooling water, the pressure is proper, the regulation is not needed, the water quantity and the water pressure are sufficient, the effect is excellent, and the first backwashing water inlet branch pipe is used as a standby backwashing pipeline externally connected with the water source.
The utility model also provides a closed water heat exchanger, which can be developed in the normal operation period of a unit through the backwashing structure, can be stopped and isolated for a short time by one closed water heat exchanger, and can be transformed by a small amount of welding construction. The transformation process is simple and easy to implement, the normal operation of the unit is not influenced, and the economic benefit is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a backwash water outlet branch pipe and a cooling water inlet pipe;
FIG. 3 is a schematic structural diagram of another embodiment of the present invention;
in the drawings: 1-closed water heat exchanger body, 2-backwash water outlet branch pipe, 3-third manual door, 4-first electric door, 5-second electric door, 6-cooling water inlet pipe, 7-cooling water outlet pipe, 8-first manual door, 9-second manual door, 10-first backwash water inlet branch pipe, 11-pressure gauge, 12-second backwash water inlet branch pipe and 13-fourth manual door.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
As shown in figure 1, the utility model provides a disassembly-free backwashing structure, which strives to solve the problem that a water heat exchanger is easy to block through technical transformation of the water heat exchanger. The frequency of disassembly and assembly cleaning of the heat exchanger is reduced, equipment damage caused by disassembly and assembly is reduced, workload of maintainers is reduced, and labor cost is lowered. And meanwhile, the two heat exchangers meet the closed water requirement of the unit at any time, the load capacity of the unit is improved, and the economic benefit of the unit is ensured.
In this embodiment, the modification of the water heat exchanger structure first needs to stop the water heat exchanger to be modified and then make a safety isolation measure. A branch pipe is additionally welded in front of the electric door of the cooling water outlet pipeline, two manual doors are additionally arranged on the branch pipe, and a pressure gauge is additionally arranged between the two manual doors; a branch pipe is additionally welded behind the electric door of the cooling water inlet pipeline, the branch pipe is additionally arranged at the lower part of the pipeline and used for discharging water, and one manual door is arranged on the branch pipe.
Specifically, the backwashing structure provided by the utility model comprises a cooling water inlet pipe 6 and a cooling water outlet pipe 7, wherein both an outlet of the cooling water inlet pipe 6 and an inlet of the cooling water outlet pipe 7 are used for being connected with a water heat exchanger, a first electric door 4 is arranged on the cooling water inlet pipe 6, a second electric door 5 is arranged on the cooling water outlet pipe 7, a first backwashing water inlet branch pipe 10 is connected between the second electric door 5 and the inlet of the cooling water outlet pipe 7, an outlet of the first backwashing water inlet branch pipe 10 is connected with the cooling water outlet pipe 7 in a welding manner, a backwashing water outlet branch pipe 2 is connected between the first electric door 4 and the outlet of the cooling water inlet pipe 6, and an inlet of the backwashing water outlet branch pipe 2 is connected with the cooling water inlet pipe 6 in a welding manner. Wherein, it has first manual door 8 and the manual door 9 of second to establish ties on the first back flush branch pipe 10, is connected with manometer 11 between first manual door 8 and the manual door 9 of second, can monitor the pressure of the back flush water in the first back flush branch pipe 10 inner chamber through manometer 11 to adjust the pressure of back flush water, make the flush water pressure be less than closed water pressure, prevent to take place to leak, pollute closed water.
The back flush water source is connected to the inlet of the first back flush water inlet branch pipe 10, fire-fighting water is used as the back flush water source in the embodiment, after the back flush water enters the first back flush water inlet branch pipe 10, the first manual door 8 is in a closed state, the second manual door 9 is opened, the reading of the pressure gauge 11 is read, the pressure of the flush water is lower than that of the closed water, the first manual door 8 is opened, and the back flush water enters the water heat exchanger for back flush.
In this embodiment, a third manual door 3 is disposed on the backwash water outlet branch pipe 2, and the third manual door 3 is used to open or close the backwash water outlet branch pipe 2, so as to allow backwash water and impurities to flow out.
As shown in fig. 2, it is preferable that the backwash water outlet branch pipe 2 is disposed at the bottom of the cooling water inlet pipe 6, i.e., the settling side of the cooling water inlet pipe 6, to facilitate the discharge of the settled silt.
As shown in fig. 3, in another embodiment of the present invention, a branch pipe is additionally installed on the cooling water inlet pipe 6, that is, a second backwash water inlet branch pipe 12, an outlet of the second backwash water inlet branch pipe 12 is connected to the cooling water outlet pipe 7, an inlet of the second backwash water inlet branch pipe 12 is disposed between the first electric door 4 and the inlet 6 of the cooling water inlet pipe, an outlet of the second backwash water inlet branch pipe 12 is disposed between the second electric door 9 and the inlet of the cooling water outlet pipe 6, and the first backwash water inlet branch pipe 10 serves as a backup backwash pipeline for an external water source. Wherein, a fourth manual door 13 is arranged on the second backwashing water inlet branch pipe 12.
In this embodiment, the utility model further provides a closed water heat exchanger, and the backwashing structure of the utility model is applied to the closed water heat exchanger, wherein a cooling water inlet of the closed water heat exchanger body 1 is connected with an outlet of the cooling water inlet pipe 6, and a cooling water outlet of the closed water heat exchanger body 1 is connected with an inlet of the cooling water outlet pipe 7.
Specifically, in normal operation, one closed water heat exchanger operates, and the other performs backwashing. And (4) isolating the closed water heat exchanger to be washed, closing an inlet and an outlet door at the closed water side, and closing an inlet and an outlet door at the cooling water side. A back flush water source is connected to a branch pipe newly added to a cooling water outlet pipe, and fire water is selected by the factory. Through the manual door adjustment of second backwashing water pressure, read the manometer registration, make the sparge water pressure be less than closed water pressure, prevent to take place to leak, pollute closed water. After the pressure is proper, a first manual door of a backwashing water inlet pipe is opened. And then opening a third manual door of the backwashing water outlet branch pipe of the cooling water inlet pipe to perform backwashing of the heat exchanger. And after the water quality of the back-flushing water outlet branch pipe is clear and no silt sand grains are continuously flushed out, the back flushing is finished. And closing the third manual door of the back washing water outlet branch pipe, and then closing the first manual door and the second manual door of the back washing water inlet branch pipe. And after the back washing is finished, putting the water into the closed water heat exchanger to operate, and isolating the operation heat exchanger to carry out alternate back washing.
After a period of time inspection, the scheme relieves the rapid blocking condition of the closed water heat exchanger under the high-load condition of the high-temperature unit to a certain extent. But the fire-fighting water volume is less, and the washing effect is relatively poor, and external pipeline complex operation moreover. In another embodiment, the closed water heat exchanger is further modified: the closed water cooling water is directly used for backwashing water sources. According to the scheme, a branch pipe is led out of the front of a cooling water inlet door of the closed water heat exchanger, and a manual door is additionally arranged and then connected to the front of a cooling water outlet electric door to serve as a backwashing water source. Compared with the prior transformation scheme, the scheme has the characteristics of simple operation and good backwashing effect. Because the back washing pipeline is a fixed pipeline, the connection operation is not needed, and only two manual doors are needed to be operated during back washing; the backwashing water source adopts seawater for cooling, the pressure is suitable, adjustment is not needed, the water quantity and the water pressure are sufficient, and the effect is excellent. The former retrofit solution remains as a complement to the latter solution.
After the operation and transformation, the utility model basically meets the requirement of the unit on the closed water by the way of alternate back flushing operation of the two closed water heat exchangers. Especially under the high unit load condition of high temperature in summer, closed water temperature still can satisfy the unit operation requirement, no longer takes place because of the high condition that causes the load of closed water temperature to be limited. Greatly improves the economic benefits of unit operation and ensures the unit operation safety. This transformation can be carried out during normal operating of unit, carries out a closed water heat exchanger's the isolation of stopping operation for a short time, carries out a small amount of welding construction, can accomplish the transformation. The transformation process is simple and easy to implement, the normal operation of the unit is not influenced, and the economic benefit is ensured.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A disassembly-free back washing structure which is characterized by comprising a cooling water inlet pipe (6) and a cooling water outlet pipe (7), the outlet of the cooling water inlet pipe (6) and the inlet of the cooling water outlet pipe (7) are both used for connecting a water heat exchanger, a first electric door (4) is arranged on the cooling water inlet pipe (6), a second electric door (5) is arranged on the cooling water outlet pipe (7), a first back-washing water inlet branch pipe (10) is connected between the second electric door (5) and the inlet of the cooling water outlet pipe (7), the outlet of the first back-flushing water inlet branch pipe (10) is connected with a cooling water outlet pipe (7), a back-washing water outlet branch pipe (2) is connected between the first electric door (4) and the outlet of the cooling water inlet pipe (6), the inlet of the back washing water outlet branch pipe (2) is connected with the cooling water inlet pipe (6).
2. The disassembly-free backwashing structure of claim 1, wherein a first manual door (8) is connected to the first backwashing water inlet branch pipe (10), and the first manual door (8) is used for opening or closing the first backwashing water inlet branch pipe (10).
3. The disassembly-free backwashing structure of claim 2, wherein a second manual door (9) is further connected to the first backwashing water inlet branch pipe (10), the second manual door (9) is connected with the first manual door (8) in series, a pressure gauge (11) is connected between the first manual door (8) and the second manual door (9), and the pressure gauge (11) is used for monitoring the pressure of backwashing water in the inner cavity of the first backwashing water inlet branch pipe (10).
4. The disassembly-free backwashing structure of claim 1, wherein an inlet of the first backwashing water inlet branch pipe (10) is connected with a backwashing water source, and the backwashing water source is fire-fighting water.
5. The disassembly-free backwashing structure of claim 1, wherein a third manual door (3) is arranged on the backwashing water outlet branch pipe (2), and the third manual door (3) is used for opening or closing the backwashing water outlet branch pipe (2).
6. A disassembly-free backwash structure as claimed in claim 1, wherein the backwash water outlet branch pipe (2) is arranged on the settling side of the cooling water inlet pipe (6).
7. The disassembly-free backwashing structure of claim 1, wherein the first backwashing water inlet branch pipe (10) and the backwashing water outlet branch pipe (2) are respectively connected to the cooling water outlet pipe (7) and the cooling water inlet pipe (6) by welding.
8. The disassembly-free backwashing structure of claim 1, wherein a second backwashing water inlet branch pipe (12) is connected to the cooling water inlet pipe (6), an outlet of the second backwashing water inlet branch pipe (12) is connected to the cooling water outlet pipe (7), an inlet of the second backwashing water inlet branch pipe (12) is arranged between the first electric door (4) and an inlet of the cooling water inlet pipe (6), and an outlet of the second backwashing water inlet branch pipe (12) is arranged between an inlet of the second electric door (5) and an inlet of the cooling water outlet pipe (7).
9. The disassembly-free backwashing structure of claim 8, wherein a fourth manual door (13) is provided on the second backwashing water inlet branch pipe (12).
10. A closed water heat exchanger, which is characterized by comprising a closed water heat exchanger body and the disassembly-free back washing structure as claimed in any one of claims 1 to 9, wherein a cooling water inlet of the closed water heat exchanger body (1) is connected with an outlet of a cooling water inlet pipe (6), and a cooling water outlet of the closed water heat exchanger body (1) is connected with an inlet of a cooling water outlet pipe (7).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121792042.5U CN215952338U (en) | 2021-08-02 | 2021-08-02 | Disassembly-free backwashing structure and closed water heat exchanger |
| DE212021000232.3U DE212021000232U1 (en) | 2021-08-02 | 2021-10-25 | Disassembly-free backwash structure and closed cooler |
| PCT/CN2021/126082 WO2023010692A1 (en) | 2021-08-02 | 2021-10-25 | Disassembly-free backflushing structure, and closed radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121792042.5U CN215952338U (en) | 2021-08-02 | 2021-08-02 | Disassembly-free backwashing structure and closed water heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215952338U true CN215952338U (en) | 2022-03-04 |
Family
ID=80434741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121792042.5U Active CN215952338U (en) | 2021-08-02 | 2021-08-02 | Disassembly-free backwashing structure and closed water heat exchanger |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN215952338U (en) |
| WO (1) | WO2023010692A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1301027C (en) * | 1986-11-04 | 1992-05-19 | Solv-X Environmental Systems Inc. | Power back scrubbing and flushing system for cooling systems |
| JP2548933B2 (en) * | 1987-03-25 | 1996-10-30 | 伊弘 友保 | Cleaning method of tube heat exchanger heat transfer tube |
| ATE189616T1 (en) * | 1995-12-08 | 2000-02-15 | Ct Umwelttechnik Ag | BACKWASHABLE FILTER SYSTEM |
| CN205690965U (en) * | 2016-06-07 | 2016-11-16 | 浙江尤夫高新纤维股份有限公司 | A kind of spinning cooling water coke slurry device back purge system |
| CN207610604U (en) * | 2017-12-08 | 2018-07-13 | 安徽华尔泰化工股份有限公司 | A kind of plate heat exchanger on-line cleaning device |
| CN212931157U (en) * | 2020-11-19 | 2021-04-09 | 深圳市深水环境科技有限公司 | Backwashing device for fan cooler of sewage treatment plant |
-
2021
- 2021-08-02 CN CN202121792042.5U patent/CN215952338U/en active Active
- 2021-10-25 WO PCT/CN2021/126082 patent/WO2023010692A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023010692A1 (en) | 2023-02-09 |
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