CN105642022A - Metal-sintered-screen-expanded-backwashed cylindrical filter core and washing method thereof - Google Patents

Metal-sintered-screen-expanded-backwashed cylindrical filter core and washing method thereof Download PDF

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Publication number
CN105642022A
CN105642022A CN201610164934.8A CN201610164934A CN105642022A CN 105642022 A CN105642022 A CN 105642022A CN 201610164934 A CN201610164934 A CN 201610164934A CN 105642022 A CN105642022 A CN 105642022A
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CN
China
Prior art keywords
filter screen
fin
filter
cleaning fluid
gas
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.)
Granted
Application number
CN201610164934.8A
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Chinese (zh)
Other versions
CN105642022B (en
Inventor
张子超
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.)
Hebei Lian Da Filters Co Ltd
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Hebei Lian Da Filters Co Ltd
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Publication date
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Priority to CN201610164934.8A priority Critical patent/CN105642022B/en
Publication of CN105642022A publication Critical patent/CN105642022A/en
Application granted granted Critical
Publication of CN105642022B publication Critical patent/CN105642022B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • 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
    • B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • 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
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • 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
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/72—Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
    • B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/0415—Details of supporting structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/0461—Springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter
    • B01D2201/087—Regeneration of the filter using gas bubbles, e.g. air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/06—Details of supporting structures for filtering material, e.g. cores

Abstract

The invention belongs to the technical field of filter cores and discloses a metal-sintered-screen-expanded-backwashed cylindrical filter core and a lining board mounting method using the filter core. The metal-sintered-screen-expanded-backwashed cylindrical filter core is mainly technically characterized by comprising a cylindrical filter screen, of which one end is provided with a closure head, wherein a flange base is arranged at the other end of the filter screen, spiral supporting springs are arranged at the inner side of the filter screen along the axial direction of the filter screen, a fin support ring is arranged at one side, close to the flange base, of each supporting spring, fins are arranged at the inner side of the fin support ring along the radial direction, a truncated-cone-shaped reflecting tube is arranged at the inner sides of the supporting springs, and a cone-shaped conical head is arranged above the reflecting tube. Cleaning fluid or gas with certain pressure is introduced into the cylindrical filter screen from one end of the flange base in an impulse manner; one part of the cleaning fluid or gas impacts the fins, and the filter screen does wavy movement in the axial direction; the other part of the cleaning fluid or gas rapidly passes through gaps among the fins and enters the conical head below the fins and the outer side face of the reflecting tube; under the action of a radial external force and the wavy sloshing of the filter screen, filter cakes attached to the outer side of the filter screen can rapidly fall off.

Description

The anti-cleaning method that cleans cylinder filter core and this filter core of sintered metal mesh expansion
Technical field
The invention belongs to the anti-cleaning method that cleans cylinder filter core and this filter core of sintered metal mesh expansion, relate in particular to the anti-cleaning method that cleans cylinder filter core and this filter core of a kind of sintered metal mesh expansion.
Background technology
In fields such as pharmacy, beverage productions; for the particle producing in the bulky grain in Chalk-dust filtering or fruit expressing process; adopt the filter core with filter screen; the filter screen of filter core mainly adopts filter cloth at present; because filter cloth has certain flexibility; in the time being subject to the highly pressurised liquid of reverse cleaning or gas and impacting, can rock within the specific limits, make that filter cake and filter screen are rapid to be separated. But there is following defect in filter cloth: one, and poor corrosion resistance, under the corrosive environments such as acid or alkalescence, reduces service life greatly; Its two, in the time of filter gauze cleaning, oppositely impact with highly pressurised liquid or gas, because filter screen outside does not have bracing frame, therefore easily filter cloth is torn.
In order to improve the corrosion resistance of filter screen, extend the service life of filter core, people adopt the filter screen of sintered metal mesh as filter core, in the time using a period of time to clean, the main following methods that adopts: one, adopt self-cleaning, pass into cleaning fluid or the gas with certain pressure by flange base one end to pulsed in cylinder type filter net; Because sintered metal mesh has some strength, in the time rinsing, filter screen is indeformable, and therefore filter cake is not easy to come off, and, the liquid cleaning also easily flows out by the filter screen part that there is no filter cake, cause filter cake be subject to liquid or gas radially outward active force reduce, further reduced filter cake and come off, cause cleaning not thorough, for food or medicine, filter cake exists in filter cylinder for a long time, apt to deteriorate, affects product quality; Its two, on the flange base of filter tank outside or filter core, vibrating head is installed, in flushing process, ceaselessly vibration, is body vibration when vibration, filter cake is not easy to come off, although play a role, effect is little, and has increased noise and wasted the energy; Its three, adopt and take off filter element cleaning, clean although it is so totallyer, but cause material to be exposed to for a long time in air, easily cause the pollution of material, especially at food or medicine field.
Summary of the invention
The first problem that the present invention will solve is just to provide a kind of corrosion resistance and good, long service life, can produces continuously, self-cleaning is effective, the anti-cylinder filter core that cleans of the residual few sintered metal mesh expansion of filter cake.
For addressing the above problem, the anti-technical scheme of cleaning the employing of cylinder filter core of sintered metal mesh expansion of the present invention is: comprise the columniform filter screen of one end with end socket, the other end at described filter screen is provided with flange base, be provided with along the helical form support spring on filter screen axial direction in described filter screen inner side, be provided with fin support ring at described support spring near a side of flange base, be provided with fin at described fin support ring radially inner side, be provided with round table-like reflecting drum in described support spring inner side, above described reflecting drum, be provided with coniform conehead.
Its additional technical feature is:
Described reflecting drum top is lower than the lower surface of described fin support ring;
Described filter screen medial surface and described support spring lateral surface keep at a certain distance away.
Second technical problem that the present invention solves is just to provide the anti-cleaning method that cleans cylinder filter core of a kind of above-mentioned sintered metal mesh expansion.
For addressing the above problem, the technical scheme that the anti-cleaning method that cleans cylinder filter core of sintered metal mesh expansion of the present invention adopts is: the method comprises the following steps:
The first step, stops filtering
Stop carrying mixed liquor to be filtered or mist to filter screen outside, and the mixing material in filter screen outside is extracted out;
Second step, passes into cleaning fluid or the gas with certain pressure to pulsed in filter screen
Pass into cleaning fluid or the gas with certain pressure by flange base one end to pulsed in cylinder type filter net; Cleaning fluid or gas are entering after flange base, part cleaning fluid or gas impact fin, another part cleaning fluid or gas enter rapidly conehead and the reflecting drum lateral surface of fin below by the gap between fin, fin is subject in pulsed under the effect of downward impulsive force and support spring self elastic force, drive fin support ring to move up and down, whole support spring extends and shortens, and the screen support position of column type is moved, and filter screen is axially producing corrugated motion; Enter the conehead of fin below and the cleaning fluid of reflecting drum lateral surface or gas by the blocking reflected of conehead and reflecting drum by gap between fin, current or air-flow be side impact outside axially, under the effect of footpath outward force and filter screen sea sloshing, the filter cake that is attached to filter screen outside is come off rapidly.
The cleaning method of sintered metal mesh expansion anti-cleaning cylinder filter core provided by the present invention and this filter core compared with prior art, have the following advantages: one, owing to comprising the columniform filter screen of one end with end socket, the other end at described filter screen is provided with flange base, be provided with along the helical form support spring on filter screen axial direction in described filter screen inner side, be provided with fin support ring at described support spring near a side of flange base, be provided with fin at described fin support ring radially inner side, be provided with round table-like reflecting drum in described support spring inner side, above described reflecting drum, be provided with coniform conehead, in the time cleaning, first stop filtering, pass into cleaning fluid or the gas with certain pressure by flange base one end to pulsed in cylinder type filter net, cleaning fluid or gas are entering after flange base, part cleaning fluid or gas impact fin, another part cleaning fluid or gas enter rapidly conehead and the reflecting drum lateral surface of fin below by the gap between fin, fin is subject in pulsed under the effect of downward impulsive force and support spring self elastic force, drive fin support ring to move up and down, whole support spring extends and shortens, the screen support position of column type is moved, filter screen is axially producing corrugated motion, is easy to cause filter cake be full of cracks and comes off, enter the conehead of fin below and the cleaning fluid of reflecting drum lateral surface or gas by the blocking reflected of conehead and reflecting drum by gap between fin, current or air-flow be side impact outside axially, spray more even, avoid the directly never filter screen place of filter cake outflow of liquid, greatly improve the radially outer impulsive force that filter cake is subject to, under the effect of footpath outward force and filter screen sea sloshing, the filter cake that is attached to filter screen outside is come off rapidly, its two, because described reflecting drum top is lower than the lower surface of described fin support ring, fin support ring can move up and down, and makes support spring flexible in the axial direction, its three, because described filter screen medial surface and described support spring lateral surface keep at a certain distance away, like this, be not only convenient to support spring axial stretching, also make in the time being subject to liquid or gas radial impact, filter screen rocks slightly, further accelerate coming off of filter cake.
Brief description of the drawings
Fig. 1 is the anti-structural representation that cleans cylinder filter core of sintered metal mesh expansion of the present invention;
The top view that Fig. 2 is Fig. 1.
Detailed description of the invention
Structure below in conjunction with the drawings and specific embodiments to the anti-cleaning of sintered metal mesh expansion of the present invention cylinder filter core and the cleaning method of use principle and this filter core are described in further details.
As depicted in figs. 1 and 2, the anti-structural representation that cleans cylinder filter core of sintered metal mesh expansion of the present invention, the anti-cylinder filter core that cleans of sintered metal mesh expansion of the present invention comprises the columniform filter screen 2 of one end with end socket 1, be provided with flange base 3 at the other end of filter screen 2, be provided with along the helical form support spring 4 on filter screen axial direction in filter screen 2 inner sides, be provided with fin support ring 5 at support spring 4 near a side of flange base, be provided with fin 6 at the radially inner side of fin support ring 5, be provided with round table-like reflecting drum 7 in the inner side of support spring 4, above reflecting drum 7, be provided with coniform conehead 8. in the time cleaning, for liquid filtering, first stop filtering, the one end by flange base 3 passes into the cleaning fluid with high pressure to pulsed in cylinder type filter net, cleaning fluid is entering after flange base 3, part cleaning fluid impacts fin 6, another part cleaning fluid enters rapidly conehead 8 and reflecting drum 7 lateral surfaces of fin 6 belows by the gap between fin 6, fin 6 is subject in pulsed under the effect of downward impulsive force and support spring 4 self elastic force, drive fin support ring to move up and down, whole support spring extends and shortens, the screen support position of column type is moved, filter screen is axially producing corrugated motion, is easy to cause filter cake be full of cracks and comes off, enter the conehead 8 of fin 6 belows and the cleaning fluid of reflecting drum 7 lateral surfaces by the blocking reflected of conehead 8 and reflecting drum 7 by gap between fin 6, current direction is outer side impact axially, spray more even, avoid the directly never filter screen place of filter cake outflow of liquid, greatly improve the radially outer impulsive force that filter cake is subject to, under the effect of footpath outward force and filter screen sea sloshing, the filter cake that is attached to filter screen outside is come off rapidly. when the filter element cleaning of corresponding dust-filtering, can adopt the self-cleaning of pulsed gases at high pressure, cleaning step is identical with cleaning fluid.
The top of reflecting drum 7 is lower than the lower surface of fin support ring 5, and fin support ring 5 can move up and down, and makes support spring 4 flexible in the axial direction.
Filter screen 2 medial surfaces and support spring 4 lateral surfaces keep at a certain distance away, and like this, are not only convenient to support spring axial stretching, also make in the time being subject to liquid or gas radial impact, and filter screen rocks slightly; Further accelerate coming off of filter cake.
The technical scheme that the anti-cleaning method that cleans cylinder filter core of sintered metal mesh expansion of the present invention adopts is: the method comprises the following steps:
The first step, stops filtering
Stop carrying mixed liquor to be filtered or mist to filter screen 2 outsides, and the mixing material in filter screen 2 outsides is extracted out;
Second step, passes into cleaning fluid or the gas with certain pressure to pulsed in filter screen
Pass into cleaning fluid or the gas with certain pressure to the interior pulsed of cylinder type filter net 2 by flange base 3 one end; Cleaning fluid or gas are entering after flange base 3, part cleaning fluid or gas impact fin 6, another part cleaning fluid or gas enter rapidly conehead 8 and reflecting drum 7 lateral surfaces of fin below by the gap between fin 6, fin 6 is subject in pulsed under the effect of downward impulsive force and support spring 4 self elastic force, drive fin support ring 5 to move up and down, whole support spring extends and shortens, and the screen support position of column type is moved, and filter screen 2 is axially producing corrugated motion. Enter the conehead of fin below and the cleaning fluid of reflecting drum lateral surface or gas by the blocking reflected of conehead and reflecting drum by gap between fin, current or air-flow be side impact outside axially, under the effect of footpath outward force and filter screen sea sloshing, the filter cake that is attached to filter screen outside is come off rapidly.
Protection scope of the present invention is not only confined to above-described embodiment; as long as structure and the anti-cleaning of sintered metal mesh of the present invention expansion cylinder filter cartridge construction are same or similar; or this filter element cleaning method and filter element cleaning method of the present invention are same or similar, just drop on the scope of protection of the invention.

Claims (4)

1. the anti-cylinder filter core that cleans of sintered metal mesh expansion, comprise the columniform filter screen of one end with end socket, the other end at described filter screen is provided with flange base, it is characterized in that: be provided with along the helical form support spring on filter screen axial direction in described filter screen inner side, be provided with fin support ring at described support spring near a side of flange base, be provided with fin at described fin support ring radially inner side, be provided with round table-like reflecting drum in described support spring inner side, above described reflecting drum, be provided with coniform conehead.
2. the anti-cylinder filter core that cleans of sintered metal mesh expansion according to claim 1, is characterized in that: described reflecting drum top is lower than the lower surface of described fin support ring.
3. the anti-cylinder filter core that cleans of sintered metal mesh expansion according to claim 1, is characterized in that: described filter screen medial surface and described support spring lateral surface keep at a certain distance away.
4. the anti-cleaning method that cleans cylinder filter core of the expansion of the sintered metal mesh described in claim 1,2 or 3, is characterized in that: the method comprises the following steps:
The first step, stops filtering
Stop carrying mixed liquor to be filtered or mist to filter screen outside, and the mixing material in filter screen outside is extracted out;
Second step, passes into cleaning fluid or the gas with certain pressure to pulsed in filter screen
Pass into cleaning fluid or the gas with certain pressure by flange base one end to pulsed in cylinder type filter net; Cleaning fluid or gas are entering after flange base, part cleaning fluid or gas impact fin, another part cleaning fluid or gas enter rapidly conehead and the reflecting drum lateral surface of fin below by the gap between fin, fin is subject in pulsed under the effect of downward impulsive force and support spring self elastic force, drive fin support ring to move up and down, whole support spring extends and shortens, and the screen support position of column type is moved, and filter screen is axially producing corrugated motion; Enter the conehead of fin below and the cleaning fluid of reflecting drum lateral surface or gas by the blocking reflected of conehead and reflecting drum by gap between fin, current or air-flow be side impact outside axially, under the effect of footpath outward force and filter screen sea sloshing, the filter cake that is attached to filter screen outside is come off rapidly.
CN201610164934.8A 2016-03-22 2016-03-22 The cleaning method of the anti-cleaning cylinder filter core of sintered metal mesh expansion and the filter core Active CN105642022B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610164934.8A CN105642022B (en) 2016-03-22 2016-03-22 The cleaning method of the anti-cleaning cylinder filter core of sintered metal mesh expansion and the filter core

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Application Number Priority Date Filing Date Title
CN201610164934.8A CN105642022B (en) 2016-03-22 2016-03-22 The cleaning method of the anti-cleaning cylinder filter core of sintered metal mesh expansion and the filter core

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CN105642022B CN105642022B (en) 2017-07-14

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108043136A (en) * 2017-12-23 2018-05-18 王涛 A kind of environmental protection dust-extraction unit of the automatic dust that shakes
CN109354188A (en) * 2018-11-27 2019-02-19 浙江工业大学上虞研究院有限公司 A kind of device and method of synchronous nitration and denitrification biofilm processing sewage
CN110742512A (en) * 2019-12-06 2020-02-04 宁波优咖智能科技有限公司 Coffee machine filter screen cleaning mechanism
CN115624800A (en) * 2022-10-27 2023-01-20 哈尔滨凯纳科技股份有限公司 Outdoor water supply pump station capable of being remotely monitored

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CN104500230A (en) * 2014-11-26 2015-04-08 成都博世德能源科技股份有限公司 High efficiency and energy saving blowback device used for gas turbine air inlet system
CN204767904U (en) * 2015-05-12 2015-11-18 安徽鑫昆净化设备有限公司 Elasticity bagfilter
CN105107243A (en) * 2015-09-22 2015-12-02 南通朗高石化设备有限公司 Variable-gap reverse-washing filter
CN205386374U (en) * 2016-03-22 2016-07-20 河北联达过滤器材有限公司 Anti - cylinder filter core that washs of metal sintering net expansion

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Publication number Priority date Publication date Assignee Title
US5053129A (en) * 1990-06-06 1991-10-01 Kitson Ralph W Filter device
US5462678A (en) * 1993-01-06 1995-10-31 Rosedale Products, Inc. Air blast backwash assembly for flexible filter device
CN104500230A (en) * 2014-11-26 2015-04-08 成都博世德能源科技股份有限公司 High efficiency and energy saving blowback device used for gas turbine air inlet system
CN204767904U (en) * 2015-05-12 2015-11-18 安徽鑫昆净化设备有限公司 Elasticity bagfilter
CN105107243A (en) * 2015-09-22 2015-12-02 南通朗高石化设备有限公司 Variable-gap reverse-washing filter
CN205386374U (en) * 2016-03-22 2016-07-20 河北联达过滤器材有限公司 Anti - cylinder filter core that washs of metal sintering net expansion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108043136A (en) * 2017-12-23 2018-05-18 王涛 A kind of environmental protection dust-extraction unit of the automatic dust that shakes
CN109354188A (en) * 2018-11-27 2019-02-19 浙江工业大学上虞研究院有限公司 A kind of device and method of synchronous nitration and denitrification biofilm processing sewage
CN109354188B (en) * 2018-11-27 2021-03-19 浙江工业大学上虞研究院有限公司 Device and method for treating sewage by synchronous nitrification and denitrification biomembrane method
CN110742512A (en) * 2019-12-06 2020-02-04 宁波优咖智能科技有限公司 Coffee machine filter screen cleaning mechanism
CN115624800A (en) * 2022-10-27 2023-01-20 哈尔滨凯纳科技股份有限公司 Outdoor water supply pump station capable of being remotely monitored

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