CN107694341A - A kind of star-like solid-liquid divides filter and divides filtering method - Google Patents

A kind of star-like solid-liquid divides filter and divides filtering method Download PDF

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Publication number
CN107694341A
CN107694341A CN201710890470.3A CN201710890470A CN107694341A CN 107694341 A CN107694341 A CN 107694341A CN 201710890470 A CN201710890470 A CN 201710890470A CN 107694341 A CN107694341 A CN 107694341A
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China
Prior art keywords
water
tank
filter
star
solid
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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
Application number
CN201710890470.3A
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Chinese (zh)
Inventor
张建卫
张宇恒
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Jiangsu Xinyu Tiancheng Environmental Protection Co Ltd
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Jiangsu Xinyu Tiancheng Environmental Protection Co Ltd
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Priority to CN201710890470.3A priority Critical patent/CN107694341A/en
Publication of CN107694341A publication Critical patent/CN107694341A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D61/00Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D63/00Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/08Flat membrane modules
    • B01D63/082Flat membrane modules comprising a stack of flat membranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D65/00Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02Membrane cleaning or sterilisation ; Membrane regeneration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

Divide filter the invention discloses a kind of star-like solid-liquid and divide filtering method, be related to Environmental-protecting treater technical field.Water spraying mechanism is provided with above the star-like rotary drum water-distributing device;The star-like rotary drum water-distributing device includes support, be connected with holder pivots rotations framework, it is covered in and rotates the filter membrane on framework and the rotary drum motor for driving rotation frame member, one end of support direction rotation framework offers entrance;The support is provided with flushing water collecting groove positioned at lower portion is rotated, and the notch for rinsing water collecting groove is set upward, and the described one end of flushing water collecting groove away from entrance is provided with opening;The intake chamber is located at tank between one end of water inlet and support, the sewage collecting tank is located between tank one end and support away from water inlet, the sewage draining exit connected with sewage collecting tank, and the delivery port connected with effluent collection groove are offered on the tank.

Description

A kind of star-like solid-liquid divides filter and divides filtering method
Technical field
The present invention relates to Environmental-protecting treater technical field, divides filter and point filter side more particularly to a kind of star-like solid-liquid Method.
Background technology
As the continuous progress of the mankind and the high speed development of social productive forces, water pollution problems getting worse, water resource are tight Lack and increasingly highlight.To make full use of the source of water, National Development and Reform Committee, the portion that builds, Chinese Ministry of Environmental Protection's joint appearance are lived《Ten, water》, it is desirable to it is universal Urban wastewater treatment firm Effluent criteria in area's in all parts of the country is improved, effluent quality requirement reaches《Urban wastewater treatment firm pollutant is arranged Put standard》(GB18918-2002)One-level A standards.And existing urban wastewater treatment firm overwhelming majority effluent quality can only achieve One-level B standard, want to reach one-level A standards, it is necessary to carry out existing urban wastewater treatment firm upgrading, technological innovation, increase The technology path of plus depth processing.
Conventional depth-type filtration technique has two kinds of rotary disc filter, active sand filter, wherein active sand filtering technique Although good filtration effect and stable effluent quality, investment cost is larger, and filter tank quantity is more, and trouble point is more, causes construction week Phase is long;Rotating disk filtering technique design cycle and short construction period, but not enough save in use.
The content of the invention
The technical problems to be solved by the invention be how the processing sewage of efficient energy-saving, overcome prior art lack Point, there is provided a kind of star-like solid-liquid divides filter.
In order to solve the above technical problems, the present invention provides:
A kind of star-like solid-liquid divides filter, including tank, is provided with star-like formula water-distributing device of transferring shares inside the tank, described star-like turn Water spraying mechanism is provided with above drum-type water-distributing device;
The star-like rotary drum water-distributing device include support, be connected with holder pivots rotation framework, be covered in rotation framework on Filter membrane and the rotary drum motor of frame member is rotated for driving, the support towards the one end for rotating framework offer into Mouthful;
The support is provided with flushing water collecting groove positioned at lower portion is rotated, and the notch for rinsing water collecting groove is set upward, And the described one end of flushing water collecting groove away from entrance is provided with opening;
The tank includes intake chamber, effluent collection groove and sewage collecting tank, and one end of the tank towards entrance offers Water inlet, the intake chamber are located at tank between one end of water inlet and support, and it is remote that the sewage collecting tank is located at tank From between one end of water inlet and support, offering the sewage draining exit connected with sewage collecting tank, and and water outlet on the tank The delivery port of collecting tank connection.
Technique effect:For filtering raw water from water inlet from intake chamber is flowed into, raw water enters filter membrane by liquid level difference from entrance Interior, during filtering, the solids in raw water is retained by the filter membrane on star-like filter, and fine particle is trapped within filtering On the medial surface of film, the source of clean water after filter flows into external water pond certainly by effluent collection groove;With retention on the inside of filter membrane Suspension increase, the solid pollutant of retention will block filtering membrane micropore, so as to hinder to filter water outlet, and then inside filter membrane Water level is begun to ramp up, filtering membrane inside and outside pressure difference increase, when liquid level, which rises, reaches certain value, it will triggering liquid level sensor, open Turn drum motor rotates, while automatic start water spraying mechanism, starts to be rinsed filter membrane, the solid that will can be retained on filter cloth Thing is rinsed to come off to fall into and rinsed in water collecting groove, filter membrane is obtained effective cleaning, is recovered strainability;Pollution under rinsing Thing enters flushing water collecting device, is individually discharged into outside cesspool;Under normal circumstances, rotary drum motor does not work, filter membrane It is static, this means that the consumption of no energy, and water spraying mechanism is just started working as rotary drum motor works, without one The work of straight row hydro-peening, has saved substantial amounts of water resource, ultralow power consumption, system automatic start on demand, only about needs daily 2.5h is operated, than like product more efficient energy-saving, and general assembly acc power is low, design cycle and short construction period, and operation is automatic Change degree is high, overall structure, is easily installed.
The technical scheme that further limits of the present invention is:
Further, the filter membrane includes some V-type filters, and the edge of the adjacent V-type filter is connected with each other, and The outside of the V-type filter is set away from lower portion is rotated.
A kind of preceding described star-like solid-liquid divides filter, and the V-type filter is provided with 44, and the folder of the V-type filter Angle is 16.4 °.
A kind of preceding described star-like solid-liquid divides filter, and the water spraying mechanism includes two water sprays arranged in parallel Pipe, the sparge pipe has been turned on flush water pump, is equipped with some nozzles on the sparge pipe, the spray on two sparge pipes Mouth water spraying direction is diagonally downward and interlaced..
A kind of preceding described star-like solid-liquid divides filter, is provided with liquid level sensor in the intake chamber, the rotary drum motor by Control and worked in liquid level sensor.
A kind of preceding described star-like solid-liquid divides filter, and the flushing water collecting groove cross section is V-shaped.
A kind of preceding described star-like solid-liquid divides filter, and the water spraying mechanism is directly over flushing water collecting groove.
A kind of star-like solid-liquid divides filter to divide filtering method, comprises the following steps:
S1, raw water is passed through in tank via water inlet, raw water is first flowed into intake chamber, is then entered by entrance Inside filter membrane, the solids in raw water is blocked in inside filter membrane, and remainder enters effluent collection groove through filter membrane In, discharged via delivery port;
S2, when liquid level sensor detects that water level reaches preset value in intake chamber, control rotary drum motor start working, rotary drum electricity Machine, which drives, rotates framework and filter membrane rotation;
S3, flush water pump is opened, nozzle starts to spray water, the solids on filter membrane is swept away, and solids drops into flushing water receipts Collect in groove, then entered by opening in sewage collecting tank, finally discharged via sewage draining exit outside tank.
Preceding described method, in step S2, the preset value of water level is the 60% of intake chamber.
The beneficial effects of the invention are as follows:
(1)Filter membrane is made up of some V-type filters in the present invention so that the larger increasing of the effective filtration area of filter membrane Add, so as to improve the filter efficiency of filter membrane;
(2)V-type filter is provided with 44 in the present invention, and the angle of V-type filter is 16.4 ° so that effective filtering of filter membrane Area increases by 47% than traditional disc structure filter area, greatly improves the disposal ability of filter membrane;
(3)Water spraying mechanism in the present invention includes two sparge pipes arranged in parallel, dual nozzle design, and multi-angle is more Distance high-efficient cleans filter membrane, greatly improves cleaning efficiency, not only can effectively clean filter membrane, when extending filter membrane use Between, moreover it is possible to 20% backwash consumption is saved, and for ease of maintenaince, nozzle is non-invasive, is not easy to be influenceed by dirt;
(4)The liquid level sensor being provided with the present invention is used to control rotary drum motor to work, when liquid level, which rises, reaches certain value, Liquid level sensor will be triggered, starts rotary drum motor work, i.e., can automatically control rotary drum motor work, run automaticity It is high;
(5)It is V-shaped that water collecting groove cross section is rinsed in the present invention, enters the solids and flushing water energy rinsed in water collecting groove It is enough more completely to be flowed out by opening, it will not be accumulated in bottom land more;
(6)Water spraying mechanism is directly over flushing water collecting groove in the present invention, when such water spraying mechanism is rinsed to filter membrane, Solids on filter membrane can be more completely rinsed into flushing water mobile phone groove, the cleaning efficiency to solids can be improved.
Brief description of the drawings
Fig. 1 is the structural representation that the present embodiment is used to embody tank;
Fig. 2 is the structural representation that the present embodiment is used to embody water inlet;
Fig. 3 is the structural representation that the present embodiment is used to embody intake chamber;
Fig. 4 is that the present embodiment is used to embody the structural representation for rinsing water collecting groove;
Fig. 5 is that the present embodiment is used to embody the structural representation for rotating framework;
Fig. 6 is the structural representation that the present embodiment is used to embody V-type filter.
Wherein:1st, tank;11st, intake chamber;12nd, effluent collection groove;121st, delivery port;13rd, sewage collecting tank;131st, blowdown Mouthful;14th, water inlet;2nd, support;21st, framework is rotated;211st, V-type filter;22nd, entrance;3rd, sparge pipe;31st, nozzle;4th, liquid level Sensor;41st, rotary drum motor;42nd, flush water pump;5th, water collecting groove is rinsed;51st, it is open.
Embodiment
A kind of star-like solid-liquid that the present embodiment provides divides filter, and structure is set as shown in figure 1, including tank 1 inside tank 1 There is star-like formula water-distributing device of transferring shares.
As shown in Figs. 4-6, star-like rotary drum water-distributing device includes support 2, and rotating bezel is rotatably connected on support 2 Frame 21, covered with filter membrane on framework 21 is rotated.
Filter membrane is made up of 44 V-type filters 211, and the angle of V-type filter 211 is 16.4 °, i.e. V-type filter 211 Paillette filter between angle be 16.4 °, the edge of adjacent V-type filter 211 is interconnected to form complete filtering Film, and the outside of V-type filter 211 is set away from the inside of framework 21 is rotated.
The rotary drum motor 41 that framework 21 rotates is rotated as shown in Fig. 2 being provided with support 2 and being used to drive.
Entrance 22 is offered towards the one end for rotating framework 21 in support 2, entrance 22 connects with rotating the inside of framework 21.
As illustrated in fig. 1 and 2, tank 1 includes intake chamber 11, effluent collection groove 12 and sewage collecting tank 13, the direction of tank 1 One end of entrance 22 offers water inlet 14, and intake chamber 11 is located at tank 1 between one end of water inlet 14 and support 2, i.e., The one end of intake chamber 11 connects with water inlet 14, and the other end connects with entrance 22, and sewage collecting tank 13 is located at tank 1 away from water inlet Between 14 one end and support 2.
Raw water flow process:Raw water is filtered from water inlet 14 from intake chamber 11 is flowed into, the raw water in intake chamber 11 relies on liquid Potential difference enters inside filter membrane from entrance 22, and then the solids in raw water is retained by filter membrane, and fine particle was trapped within On the medial surface of filter membrane, the source of clean water after filter is entered in effluent collection groove 12 through filter membrane.
As shown in figure 3, offer the sewage draining exit 131 connected with sewage collecting tank 13 on tank 1, and with effluent collection groove The delivery ports 121 of 12 connections, the sewage in sewage collecting tank 13 are discharged via sewage draining exit 131, the cleaning in effluent collection groove 12 Water is discharged via delivery port 121.
As shown in Figures 3 and 4, water spraying mechanism is provided with above star-like rotary drum water-distributing device, water spraying mechanism includes two Sparge pipe 3 arranged in parallel, and the length direction of sparge pipe 3 is parallel with the length direction for rotating framework 21, sparge pipe 3 is equal The flush water pump 42 having for providing high-pressure water is connected, some nozzles for being used to rinse filter membrane are equipped with sparge pipe 3 31, the water spraying direction of nozzle 31 on two other sparge pipe 3 diagonally downward and interlaced setting, i.e., can be compared with efficiency to V Type filter 211 is rinsed.
Support 2 is provided with flushing water collecting groove 5 positioned at the inside of framework 21 is rotated, and rinses water collecting groove 5 and is being located at water spraying mechanism just Lower section, the cross section of flushing water collecting groove 5 is V-shaped, and the notch for rinsing water collecting groove 5 is set upward, and it is remote to rinse water collecting groove 5 One end from entrance 22 is provided with opening 51, opening 51 with support 2 is extraneous connects, the flushing water in flushing water collecting groove 5 is via opening Mouth 51 is discharged.
Liquid level sensor 4 is provided with intake chamber 11, flush water pump 42 and rotary drum motor 41 are controlled by liquid level sensor 4 Work.
A kind of star-like solid-liquid divides filter to divide filtering method, comprises the following steps:
S1, raw water is passed through in tank 1 via water inlet 14, raw water is first flowed into intake chamber 11, then passes through entrance 22 Enter inside filter membrane, the solids in raw water is blocked in inside filter membrane, and remainder enters out through filter membrane In water collecting groove 12, discharged via delivery port 121;
S2, when liquid level sensor 4 detects that water level reaches preset value in intake chamber 11, preset value is set to the 60% of intake chamber 11, Control rotary drum motor 41 is started working, and rotary drum motor 41, which drives, rotates framework 21 and filter membrane rotation;
S3, flush water pump 42 is opened, nozzle 31 starts to spray water, the solids on filter membrane is swept away, and solids drops into flushing In water collecting groove 5, then entered in sewage collecting tank 13 by opening 51, finally discharged via sewage draining exit 131 outside tank 1.
Specific implementation is described as follows:
Raw water is filtered from water inlet 14 from intake chamber 11 is flowed into, raw water enters in filter membrane by liquid level difference from entrance 22, in mistake During filter, the solids in raw water is retained by the filter membrane on star-like filter, and fine particle is trapped within the interior of filter membrane On side, the source of clean water after filter flows into external water pond certainly by effluent collection groove 12;With the suspension of retention on the inside of filter membrane Thing increase, the solid pollutant of retention will block filtering membrane micropore, so as to hinder to filter water outlet, and then filter membrane water level inside Begin to ramp up, filtering membrane inside and outside pressure difference increase, when liquid level, which rises, reaches the 60% of intake chamber 11, it will triggering liquid level sensor 4 work, start rotary drum motor 41 and rotate, at the same automatic start water spraying mechanism, start to be rinsed filter membrane, can be by filter cloth The solids of retention is rinsed to come off to fall into and rinsed in water collecting groove 5, filter membrane is obtained effective cleaning, is recovered strainability; Pollutant under rinsing enters flushing water collecting device, is drained into via opening 51 in sewage collecting tank 13, and be individually discharged into Outside cesspool;Under normal circumstances, rotary drum motor 41 does not work, and filter membrane is static, and this means that no energy Consumption, and water spraying mechanism is just started working as rotary drum motor 41 works, and will not carry out hydro-peening work always, has been saved substantial amounts of Water resource, ultralow power consumption, system automatic start on demand, only about need to operate 2.5h daily, more saved than like product Efficiently, and general assembly acc power is low, design cycle and short construction period, and operation automaticity is high, overall structure, is easily installed, And the filter membrane in the present invention is made up of 44 V-type filters 211, the angle of V-type filter 211 is 16.4 ° so that filter membrane Effective filtration area than traditional disc structure filter area increase by 47%, greatly improve the disposal ability of filter membrane, carry The high efficiency of filtering;Water spraying mechanism in the present invention includes two sparge pipes 3 arranged in parallel, and twin-jet nozzle 31 is set Meter, multi-angle, more apart from high-efficiency washing filter membrane, greatly improves cleaning efficiency, not only can effectively clean filter membrane, extends Filter membrane usage time, moreover it is possible to save 20% backwash consumption, and for ease of maintenaince, nozzle 31 is non-invasive, is not easy to get dirty Dirt influences.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape Into technical scheme, all fall within the protection domains of application claims.

Claims (9)

1. a kind of star-like solid-liquid divides filter, it is characterised in that:Including tank(1), the tank(1)Inside is provided with star-like formula of transferring shares Water-distributing device, the star-like rotary drum water-distributing device top are provided with water spraying mechanism;
The star-like rotary drum water-distributing device includes support(2)With support(2)The rotation framework of rotation connection(21), be covered in Rotate framework(21)On filter membrane and for drive rotate framework(21)The rotary drum motor of rotation(41), the support(2) Towards rotation framework(21)One end offer entrance;
The support(2)Positioned at rotation framework(21)Inside, which is provided with, rinses water collecting groove(5), the flushing water collecting groove(5)'s Notch is set upward, and the flushing water collecting groove(5)Away from entrance(22)One end be provided with opening(51);
The tank(1)Include intake chamber(11), effluent collection groove(12)And sewage collecting tank(13), the tank(1)Court To entrance(22)One end offer water inlet(14), the intake chamber(11)Positioned at tank(1)Close to water inlet(14)One End and support(2)Between, the sewage collecting tank(13)Positioned at tank(1)Away from water inlet(14)One end and support(2)It Between, the tank(1)On offer and sewage collecting tank(13)The sewage draining exit of connection(131), and with effluent collection groove(12) The delivery port of connection(121).
2. a kind of star-like solid-liquid according to claim 1 divides filter, it is characterised in that:The filter membrane includes some V Type filter (211), the edge of the adjacent V-type filter (211) is connected with each other, and the outside of the V-type filter (211) Away from rotation framework(21)Inside is set.
3. a kind of star-like solid-liquid according to claim 2 divides filter, it is characterised in that:The V-type filter (211) is provided with 44, and the angle of the V-type filter (211) is 16.4 °.
4. a kind of star-like solid-liquid according to claim 2 divides filter, it is characterised in that:The water spraying mechanism includes two Sparge pipe arranged in parallel(3), the sparge pipe(3)It has been turned on flush water pump(42), the sparge pipe(3)On be all provided with There are some nozzles(31), two sparge pipes(3)On nozzle(31)Water spraying direction is diagonally downward and interlaced.
5. a kind of star-like solid-liquid according to claim 1 divides filter, it is characterised in that:The intake chamber(11)It is interior to be provided with liquid Level sensor(4), the rotary drum motor(41)It is controlled by liquid level sensor(4)Work.
6. a kind of star-like solid-liquid according to claim 1 divides filter, it is characterised in that:The flushing water collecting groove(5)It is horizontal Section is V-shaped.
7. a kind of star-like solid-liquid according to claim 1 divides filter, it is characterised in that:The water spraying mechanism is located at flushing water Collecting tank(5)Surface.
8. a kind of star-like solid-liquid divides filter to divide filtering method, it is characterised in that:Comprise the following steps:
S1, by raw water via water inlet(14)It is passed through tank(1)In, raw water first flows into intake chamber(11)It is interior, then pass through Entrance(22)Enter inside filter membrane, the solids in raw water is blocked in inside filter membrane, and remainder passes through filter membrane Enter effluent collection groove(12)In, via delivery port(121)Discharge;
S2, work as liquid level sensor(4)Detect intake chamber(11)When interior water level reaches preset value, rotary drum motor is controlled(41)Start Work, rotary drum motor(41)Drive and rotate framework(21)And filter membrane rotates;
S3, open flush water pump(42), nozzle(31)Start to spray water, the solids on filter membrane is swept away, solids drops into Rinse water collecting groove(5)In, then pass through opening(51)Enter sewage collecting tank(13)In, finally via sewage draining exit(131) Discharge tank(1)Outside.
9. according to the method for claim 8, it is characterised in that:In step S2, the preset value of water level is intake chamber(11)'s 60%。
CN201710890470.3A 2017-09-27 2017-09-27 A kind of star-like solid-liquid divides filter and divides filtering method Pending CN107694341A (en)

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CN201710890470.3A CN107694341A (en) 2017-09-27 2017-09-27 A kind of star-like solid-liquid divides filter and divides filtering method

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109574150A (en) * 2019-01-09 2019-04-05 广东台泉环保科技有限公司 A kind of rotating disc type percolate sewage accelerating separtor
CN115554762A (en) * 2022-10-31 2023-01-03 徐州志欧机电设备有限公司 A environmental protection microstrainer for sewage treatment

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CN102897959A (en) * 2012-11-07 2013-01-30 河海大学 Integrated water treatment equipment and method
CN104436809A (en) * 2014-12-31 2015-03-25 江阴天汇环保设备有限公司 Revolving drum type micro-filter and sewage treatment method
US20150224426A1 (en) * 2012-08-09 2015-08-13 Sumitomo Electric Industries, Ltd. Liquid filtering device and ballast water treatment apparatus
CN106536015A (en) * 2015-04-30 2017-03-22 住友电气工业株式会社 Filtration device, pleated filter, and ballast water treatment method
CN207401361U (en) * 2017-09-27 2018-05-25 江苏新宇天成环保有限公司 A kind of star-like solid-liquid divides filter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150224426A1 (en) * 2012-08-09 2015-08-13 Sumitomo Electric Industries, Ltd. Liquid filtering device and ballast water treatment apparatus
CN102897959A (en) * 2012-11-07 2013-01-30 河海大学 Integrated water treatment equipment and method
CN104436809A (en) * 2014-12-31 2015-03-25 江阴天汇环保设备有限公司 Revolving drum type micro-filter and sewage treatment method
CN106536015A (en) * 2015-04-30 2017-03-22 住友电气工业株式会社 Filtration device, pleated filter, and ballast water treatment method
CN207401361U (en) * 2017-09-27 2018-05-25 江苏新宇天成环保有限公司 A kind of star-like solid-liquid divides filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109574150A (en) * 2019-01-09 2019-04-05 广东台泉环保科技有限公司 A kind of rotating disc type percolate sewage accelerating separtor
CN115554762A (en) * 2022-10-31 2023-01-03 徐州志欧机电设备有限公司 A environmental protection microstrainer for sewage treatment

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