CN214611930U - Purifier convenient to dirty is dispeled to circulating water - Google Patents

Purifier convenient to dirty is dispeled to circulating water Download PDF

Info

Publication number
CN214611930U
CN214611930U CN202120707123.4U CN202120707123U CN214611930U CN 214611930 U CN214611930 U CN 214611930U CN 202120707123 U CN202120707123 U CN 202120707123U CN 214611930 U CN214611930 U CN 214611930U
Authority
CN
China
Prior art keywords
ring
filter
valve
circulating
circulating water
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.)
Active
Application number
CN202120707123.4U
Other languages
Chinese (zh)
Inventor
刘冬奇
师延儒
赵永虎
刘叶姝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Wujin Shengyuan Chemical Co ltd
Original Assignee
Changzhou Wujin Shengyuan Chemical Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changzhou Wujin Shengyuan Chemical Co ltd filed Critical Changzhou Wujin Shengyuan Chemical Co ltd
Priority to CN202120707123.4U priority Critical patent/CN214611930U/en
Application granted granted Critical
Publication of CN214611930U publication Critical patent/CN214611930U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Filtration Of Liquid (AREA)

Abstract

The utility model relates to a purifier convenient to dirty is dispeled to circulating water belongs to water purification unit's field, and it includes the circulating pipe, be equipped with the circulating pump on the circulating pipe and annotate the agent pipe, can dismantle on the circulating pipe and be connected with the filter valve, the filter valve is the butterfly valve formula, the valve block of filter valve is the filter cloth, the relative both ends that just are located the filter valve on the circulating pipe all are equipped with the stop valve. This application is when needs dispel the dirt to the circulating water, closes the filter valve, and the filter cloth closes the stop valve with the dirt impurity interception of circulating water suspension after the interception finishes, then demolishs the filter valve and clears up or change the filter cloth, and reinstallation alright continue to use, has reached and has dispel the purpose of the suspension impurity of aquatic under the prerequisite of not a large amount of discharge circulating water, has the effect that reduces the water waste.

Description

Purifier convenient to dirty is dispeled to circulating water
Technical Field
The application relates to the technical field of water purification units, in particular to a purification device convenient for removing scale from circulating water.
Background
Circulating water systems are mainly used in both industrial and domestic applications, and the main purpose is to save water. The circulating water system consists of a circulating pipeline, a circulating pump, a control mechanism, a one-way valve and the like. A circulating cooling water system is a cooling water treatment system widely used in industry, in which cooling water is returned through a circulating pipe to be reused under the action of a circulating pump after heat exchange is completed.
As the water in the circulating water system repeatedly flows through the circulating pipeline, a large amount of dirt is deposited on the inner wall of the pipeline, so that the scale inhibitor is usually injected into the cooling water in the circulating pipeline, the action mechanism of part of the scale inhibitor is regeneration and demoulding inhibition, namely the scale inhibitor can form a film which is deposited together with inorganic crystal particles on the inner wall of the pipeline, and when the film is increased to a certain thickness, the film is cracked and takes a certain scale layer to be separated from the inner wall of the pipeline, so that the growth of the scale layer is inhibited.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: under the effect of antisludging agent, the dirt breaks away from the inner wall of water pipe and gets into in the circulating water stream and form tiny particulate matter and mix in the aquatic, carries out circulative cooling work with circulating water stream jointly, and along with the increase of impurity, the heat transfer performance of cooling water will receive the influence, and to the longer circulating water system of pipeline, the whole circulating water of changing will cause great water waste.
SUMMERY OF THE UTILITY MODEL
In order to improve the drainage and dispel the dirty problem that causes the water waste, this application provides a purifier convenient to dirty is dispelled to circulating water.
The application provides a purifier convenient to dirty is dispelled to circulating water adopts following technical scheme:
the utility model provides a purifier convenient to dirty is dispeled to circulating water, includes the circulating pipe, be equipped with the circulating pump on the circulating pipe and annotate the agent pipe, can dismantle on the circulating pipe and be connected with the filter valve, the filter valve is the butterfly valve formula, the valve block of filter valve is the filter cloth, the relative both ends that just are located the filter valve on the circulating pipe all are equipped with the stop valve.
Through adopting above-mentioned technical scheme, when circulation system normal use, the filter valve is in the open mode, when the dirt impurity of a large amount of suspensions appears in the circulating fluid in the circulating line, close the filter valve, the dirt impurity of circulating water is intercepted by the filter cloth, the circulating water then passes the filter cloth and continues the circulation flow, after the dirt of dispelling is accomplished, close the stop valve, then demolish the filter valve and wash the clearance that alright realize the dirt to the filter cloth, installation filter valve alright continue to use, the clearance of aquatic suspension dirt has been realized under the prerequisite of not a large amount of discharge circulating water.
Optionally, the filter valve includes go-between, outer ring, interior support ring and control shaft, go-between and the coaxial relatively fixed of circulating pipe, the control shaft rotates with the go-between relatively and the axis of rotation is the control shaft, the control shaft supports ring relatively fixed with outer ring and interior with outer ring, the outer ring is supported with interior to support the coaxial relatively fixed of ring, the relative both sides face of filter cloth supports ring looks butt, outer ring and interior with outer ring and interior support ring respectively.
Through adopting above-mentioned technical scheme, outer pressure ring and interior support ring are fixed with the installation of realization to the filter cloth with the common centre gripping of filter cloth, change the connection relation of outer pressure ring and interior support ring alright realize the installation or demolish of filter cloth, facilitate for the dismantlement operation of filter cloth.
Optionally, a cloth pressing ring table is fixedly connected to one end face of the outer pressure ring, the cloth pressing ring table is coaxial with the outer pressure ring, one side of the inner supporting ring facing the cloth pressing ring table and the end face of the inner supporting ring facing the cloth pressing ring table are respectively abutted to the opposite cloth faces of the filter cloth, a mounting protrusion is fixedly connected to the end face of the inner supporting ring facing the cloth pressing ring table, a mounting groove for the mounting protrusion to insert is fixedly connected to one side of the inner supporting ring facing the cloth pressing ring table, and a mounting hole for the mounting protrusion to pass through is formed in the filter cloth.
Through adopting above-mentioned technical scheme, when the cloth cover of rivers impact filter cloth, the installation arch forms the effort of anti-deformation to the filter cloth, makes the difficult dislocation slip that takes place of filter cloth, improves the position stability of filter cloth in the use.
Optionally, the control shaft includes a main shaft and an auxiliary shaft which are coaxial with each other, the main shaft and the auxiliary shaft are both relatively fixed with the inner abutting ring and in transition fit with the outer pressure ring and the connecting ring, one end of the auxiliary shaft, which is far away from the main shaft, is located in the wall thickness of the connecting ring, and one end of the main shaft, which is far away from the auxiliary shaft, is located outside the connecting ring.
Through adopting above-mentioned technical scheme, the control shaft plays mutual fixed, rotation support and rotation control's effect simultaneously to outer clamping ring and interior support ring, carries out the dismouting alright realize the whole equipment or the split of strainer valve simultaneously to main shaft and countershaft.
Optionally, a liquid sight glass is arranged on the circulating pipe.
Through adopting above-mentioned technical scheme, the operator accessible looks the liquid mirror and observes the liquid state in the circulating line, judges whether need to close the strainer valve and carry out the liquid filtration scale removal through whether muddy to liquid.
Optionally, a detection table is arranged in the liquid observation mirror, and acid-base test paper is arranged on the detection table.
By adopting the technical scheme, in industrial production, if the circulating water has higher alkalinity, scale deposition is easier to occur, and an operator can make a judgment whether scale inhibitors need to be added according to the liquid acid-base state displayed by the acid-base test paper.
Optionally, the liquid viewing mirror is cylindrical, threads are arranged on the outer side wall of the liquid viewing mirror, and the liquid viewing mirror is connected with the circulating pipe through threads.
By adopting the technical scheme, the liquid viewing mirror can be detached or installed by rotating the liquid viewing mirror, so that convenience is provided for the replacement operation of the acid-base test paper.
Optionally, a filter cover is arranged between the inner cavity of the liquid sight glass and the inner cavity of the circulating pipe.
By adopting the technical scheme, the filtering cover can block dirt and impurities with larger size in the circulating water, so that the dirt and impurities are not easy to enter the inner cavity of the sight glass, and the observation visual field in the sight glass is prevented from being negatively influenced.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through the arrangement of the filter valve and the stop valve, when more suspended dirt and impurities appear in the liquid in the circulating pipe, the filter valve is closed to intercept the dirt and impurities, then the stop valve is closed, the filter valve is dismounted to clean the dirt intercepted by the filter cloth, then the filter valve is remounted, and the impurity removal work is finished;
2. through the setting of looking the liquid mirror, the operator observes the state of the inside liquid of circulating pipe through looking the liquid mirror, judges whether need the work of starting the strainer valve.
Drawings
Fig. 1 is a schematic structural diagram of a purification apparatus for facilitating scale removal of circulating water in an embodiment of the present application.
Fig. 2 is a schematic cross-sectional view for embodying a filter valve mounting structure in an embodiment of the present application.
Fig. 3 is an exploded view of an embodiment of the present application for embodying a filter valve structure.
Fig. 4 is an exploded schematic view for embodying the liquid lens structure in the embodiment of the present application.
Description of reference numerals: 1. a circulation pipe; 11. a circulation pump; 12. an agent injection pipe; 13. a stop valve; 14. an exhaust valve; 2. a filter valve; 21. a connecting ring; 22. an outer pressure ring; 221. a cloth pressing ring table; 2211. installing a groove; 23. an inner abutting ring; 231. mounting a boss; 24. filtering cloth; 241. mounting holes; 25. a control shaft; 251. a main shaft; 2511. a valve handle; 252. a counter shaft; 3. a liquid viewing mirror; 31. a mirror body; 32. a filter housing; 33. a detection table; 331. acid-base test paper.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a purifier convenient to circulating water is dispelled dirty, as shown in figure 1, including the circulating pipe 1 that is used for supplying water stream to pass through, be equipped with circulating pump 11, annotate agent pipe 12, filter valve 2 and sight glass 3 on the circulating pipe 1, circulating pump 11 is used for providing power for the liquid in the circulating pipe 1, annotates agent pipe 12 and is used for injecting antisludging agent or acid-base agent into circulating pipe 1, filter valve 2 is used for intercepting the tiny impurity that mixes in the liquid in the circulating pipe 1, sight glass 3 is used for showing the liquid state in the circulating pipe 1.
As shown in fig. 2 and 3, the filter valve 2 is a butterfly valve type, and includes a connection ring 21, a control shaft 25 and a valve plate, the valve plate includes an outer pressure ring 22, an inner abutting ring 23 and a filter cloth 24, the connection ring 21 is connected with the circulation pipe 1 through a flange, the axis of the control shaft 25 is coplanar with the axis of the connection ring 21 and is perpendicular to each other, the control shaft 25 provides a rotary support for the valve plate, and simultaneously provides a fixed point for fixing the outer pressure ring 22 and the inner abutting ring 23; the outer pressing ring 22 and the inner pressing ring 23 are coaxially and relatively fixed, when the filter valve 2 is in a closed state, the connecting ring 21 and the outer pressing ring 22 are coaxial, and the outer edge of the outer pressing ring 22 is pressed against the inner side wall of the connecting ring 21 without a gap. The inner diameter of the outer pressure ring 22 is the same as the nominal size of the outer diameter of the inner pressing ring 23, a cloth pressing ring platform 221 is integrally formed on one end face of the outer pressure ring 22, and the inner diameter of the cloth pressing ring platform 221 is equal to that of the inner pressing ring 23; the filter cloth 24 is fixedly installed under the common clamping of the outer pressing ring 22 and the inner abutting ring 23, the edge cloth cover of the filter cloth 24 in the clamped state is abutted against the inner side surface of the outer pressing ring 22 and the outer side surface of the inner abutting ring 23 respectively, so that the cloth cover at the position is annular and is vertical to the cloth cover at the middle part of the filter cloth 24, and meanwhile, the opposite cloth cover at the position, close to the edge, of the filter cloth 24 is abutted against the end surface of the inner abutting ring 23 and the side surface, facing the inner abutting ring 23, of the cloth pressing ring platform 221.
As shown in fig. 2 and 3, a plurality of mounting protrusions 231 are integrally formed on the end surface of the inner support ring 23 facing the cloth pressing ring stand 221, the mounting protrusions 231 are arranged in an array around the inner support ring 23, mounting grooves 2211 corresponding to the number of the mounting protrusions 231 are formed on one side of the cloth pressing ring stand 221 facing the inner support ring 23, correspondingly, mounting holes 241 for the mounting protrusions 231 to pass through are formed in the filter cloth 24, and the mounting protrusions 231 pass through the mounting holes 241 and are inserted into the mounting grooves 2211; in the working process of the filter valve 2, water flow impacts the filter cloth 24 to enable the cloth cover of the filter cloth 24 to form tension towards the axis of the filter valve 2, and at the moment, the installation bulge 231 generates reaction force for resisting displacement of the cloth cover on the filter cloth 24, so that the aim of preventing the filter cloth 24 from being dislocated is fulfilled.
As shown in fig. 2 and 3, the control shaft 25 is divided into a main shaft 251 and a sub shaft 252 which are coaxial with each other, and the main shaft 251 is an operation shaft for controlling the rotation of the valve sheet of the filter valve 2. The main shaft 251 and the auxiliary shaft 252 sequentially penetrate through the inner abutting ring 23, the filter cloth 24 and the outer pressing ring 22 from inside to outside and are inserted into the connecting ring 21, wherein the inner abutting ring 23 is in threaded connection with the main shaft 251 and the auxiliary shaft 252, the outer pressing ring 22 and the connecting ring 21 are in transition fit with the main shaft 251 and the auxiliary shaft 252, in a state of installation, one end, facing the connecting ring 21, of the auxiliary shaft 252 is located in the wall thickness of the connecting ring 21, one end, away from the auxiliary shaft 252, of the main shaft 251 extends out of the connecting ring 21, and a valve handle 2511 is installed at the end. When the main shaft 251 is rotated, the main shaft 251, the auxiliary shaft 252 and the connecting ring 21 rotate relatively, and the valve sheet of the filter valve 2 and the control shaft 25 are connected through threads to establish a relatively fixed connection relationship, so that the inner abutting ring 23, the outer pressing ring 22 and the filter cloth 24 clamped by the inner abutting ring 23 and the outer pressing ring 22 rotate synchronously along with the rotation of the main shaft 251.
As shown in fig. 1 and 4, the liquid viewing mirror 3 comprises a mirror main body 31 carrying and embedded with lenses and a filter cover 32 positioned in the mirror main body 31, the mirror main body 31 is cylindrical in shape, the outer side wall of the mirror main body 31 is of a threaded structure, and the mirror main body 31 is installed with the circulation pipe 1 through threaded connection; the filter cover 32 is a semi-sphere, and is also mounted with the main body 31 of the sight glass through a threaded connection. In industrial production, when the alkalinity of cooling water in a circulating cooling water system is too high, scaling is more likely to occur, so a detection table 33 is further arranged in the sight glass 3, an acid-base test paper 331 for detecting the pH value of liquid is attached to the detection table 33, the detection table 33 is welded and fixed with the filter cover 32, and the filter cover 32 is used for reducing the influence of large-size particle impurities entering a cavity between the filter cover 32 and the sight glass main body 31 on the observation visual field in the sight glass 3.
As shown in fig. 1, in the normal use of the circulating cooling water system, the filter valve 2 is in an open state; when the cooling water needs to be purified, the filter valve 2 is closed, and the filter cloth 24 intercepts particle impurities in the water flow. After the filter valve 2 is used, the filter cloth 24 needs to be detached, cleaned or replaced, so the stop valves 13 are arranged on the circulation pipe 1 and on both sides of the filter valve 2, and an exhaust valve 14 is arranged between one side of the filter valve 2 facing the water flow direction and the stop valves 13.
The implementation principle of the purification device convenient for removing scale from circulating water in the embodiment of the application is as follows:
observing the liquid in the circulating pipe 1 through a liquid sight glass 3, and if the liquid is observed to form dirt in a closed state, adding a scale inhibitor into the circulating pipe 1 through an agent injection pipe 12; if the acid-base test paper 331 shows that the cooling water is high in alkalinity, sulfuric acid is injected into the circulating pipe 1 through the agent injection pipe 12; if the liquid in the circulating pipe 1 is observed to be turbid, the filtering work of the filtering valve 2 can be started: the filter valve 2 is closed, the filter cloth 24 intercepts particle impurities in the liquid, in the process, the change of the liquid inside is observed in real time through the liquid sight glass 3, when the clarity degree of the liquid is improved to a certain degree, the filtration is finished, and when the flow rate of the water flow is obviously reduced, the fact that more impurities are accumulated on the surface of the filter cloth 24 to cause the permeability of the filter cloth 24 to be poor is laterally shown, and the filter valve 2 needs to be disassembled to clean or replace the filter cloth 24.
When the filter valve 2 is disassembled, the stop valves 13 on the two sides of the filter valve 2 are closed, the filter valve 2 is taken down, the connection relation between the main shaft 251 and the valve handle 2511 is released, and then the control shaft 25 is disassembled, so that the connection relation between the connecting ring 21, the outer pressing ring 22 and the inner abutting ring 23 can be realized; when assembling the filter valve 2, the disassembly process is operated in the reverse direction.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a purifier convenient to dirty is dispelled to circulating water, includes circulating pipe (1), be equipped with circulating pump (11) and notes agent pipe (12) on circulating pipe (1), its characterized in that: the circulating pipe (1) is detachably connected with a filter valve (2), the filter valve (2) is of a butterfly valve type, a valve plate of the filter valve (2) is filter cloth (24), and stop valves (13) are arranged on the circulating pipe (1) and located at two opposite ends of the filter valve (2).
2. The purification device convenient for scale removal of circulating water according to claim 1, characterized in that: the filter valve (2) comprises a connecting ring (21), an outer pressing ring (22), an inner abutting ring (23) and a control shaft (25), the connecting ring (21) and the circulating pipe (1) are coaxially and relatively fixed, the control shaft (25) rotates relative to the connecting ring (21) and the rotating shaft is the axis of the control shaft (25), the control shaft (25) is relatively fixed with the outer pressing ring (22) and the inner abutting ring (23), the outer pressing ring (22) and the inner abutting ring (23) are coaxially and relatively fixed, two opposite side faces of the filter cloth (24) are respectively abutted against the outer pressing ring (22) and the inner abutting ring (23), and the outer pressing ring (22) and the inner abutting ring (23) are respectively abutted against the inner abutting ring (23).
3. The purification device convenient for scale removal of circulating water according to claim 2, characterized in that: fixedly connected with compress ring platform (221) on one of them terminal surface of outer pressure ring (22), compress ring platform (221) is coaxial with outer pressure ring (22), compress ring platform (221) towards one side of interior support ring (23) and interior support ring (23) towards the terminal surface of compress ring platform (221) respectively with the relative cloth cover looks butt of filter cloth (24), fixedly connected with installation arch (231) on the terminal surface of interior support ring (23) orientation compress ring platform (221), compress ring platform (221) towards one side fixedly connected with of interior support ring (23) and supply installation arch (231) male mounting groove (2211), set up mounting hole (241) that supply installation arch (231) to pass on filter cloth (24).
4. The purification device convenient for scale removal of circulating water according to claim 2, characterized in that: the control shaft (25) comprises a main shaft (251) and a secondary shaft (252) which are coaxial with each other, the main shaft (251) and the secondary shaft (252) are both fixed relative to the inner abutting ring (23) and in transition fit with the outer pressing ring (22) and the connecting ring (21), one end, far away from the main shaft (251), of the secondary shaft (252) is located in the wall thickness of the connecting ring (21), and one end, far away from the secondary shaft (252), of the main shaft (251) is located outside the connecting ring (21).
5. The purification device convenient for scale removal of circulating water according to claim 1, characterized in that: the circulating pipe (1) is provided with a liquid viewing mirror (3).
6. The purification device convenient for scale removal of circulating water according to claim 5, characterized in that: a detection table (33) is arranged in the liquid sight glass (3), and acid-base test paper (331) is arranged on the detection table (33).
7. The purification device convenient for scale removal of circulating water according to claim 6, characterized in that: look liquid mirror (3) and be cylindric, just the lateral wall of looking liquid mirror (3) is equipped with the screw thread, look liquid mirror (3) and circulating pipe (1) through threaded connection.
8. The purification device convenient for scale removal of circulating water according to claim 6, characterized in that: a filter cover (32) is arranged between the inner cavity of the liquid sight glass (3) and the inner cavity of the circulating pipe (1).
CN202120707123.4U 2021-04-08 2021-04-08 Purifier convenient to dirty is dispeled to circulating water Active CN214611930U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120707123.4U CN214611930U (en) 2021-04-08 2021-04-08 Purifier convenient to dirty is dispeled to circulating water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120707123.4U CN214611930U (en) 2021-04-08 2021-04-08 Purifier convenient to dirty is dispeled to circulating water

Publications (1)

Publication Number Publication Date
CN214611930U true CN214611930U (en) 2021-11-05

Family

ID=78400329

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120707123.4U Active CN214611930U (en) 2021-04-08 2021-04-08 Purifier convenient to dirty is dispeled to circulating water

Country Status (1)

Country Link
CN (1) CN214611930U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115054971A (en) * 2022-06-23 2022-09-16 岳阳振兴中顺新材料科技股份有限公司 Circulating water system convenient to scale deposit degree in detection pipeline

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115054971A (en) * 2022-06-23 2022-09-16 岳阳振兴中顺新材料科技股份有限公司 Circulating water system convenient to scale deposit degree in detection pipeline
CN115054971B (en) * 2022-06-23 2024-03-22 岳阳振兴中顺新材料科技股份有限公司 Circulating water system convenient to detect scale deposit degree in pipeline

Similar Documents

Publication Publication Date Title
CN201885472U (en) Printing and dyeing wastewater heat energy recovery system
CN214611930U (en) Purifier convenient to dirty is dispeled to circulating water
CN110878756B (en) Multifunctional water pump
CN208229482U (en) A kind of running water system filter with visor function
CN219744095U (en) Automatic back flush filter convenient to clearance
CN212141588U (en) Textile processing is with fibre washing wastewater filter equipment
CN209662744U (en) A kind of bilateral complementation backwash filter
CN210385064U (en) Self-cleaning device for filter
CN211896168U (en) Detachable purifier
CN112169395A (en) Disc filter with detachable filter disc
CN210486604U (en) Tubular heat exchanger convenient to it is clean
CN202605826U (en) Full-automatic backwashing filtering device
CN102188852B (en) Rotating-disc type ultrasonic self-cleaning microstrainer
CN218665605U (en) Water purifying device and water heater
CN218794457U (en) Ceramic filter element of sight glass filter
CN220276415U (en) High-efficient water circulating device
CN210674409U (en) Integrated scraping and washing pollution discharge type pre-filter
CN212594283U (en) Novel angle type filter
CN212854915U (en) Maintenance-free automatic pollution discharge straight-through type micro-resistance filter
CN217139531U (en) Horizontal angle leads to scrubbing ware
CN204685280U (en) A kind of combined filter device
CN220779202U (en) Auxiliary mechanism of grid machine
CN219681955U (en) Purification device of cooling circulating water system
CN216497813U (en) Filter for energy-saving graphite heat exchanger with high heat exchange effect
CN220265432U (en) High concentration sewage flocculation supernatant collection device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant