CN207694350U - Filter pipe and its filter device - Google Patents

Filter pipe and its filter device Download PDF

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Publication number
CN207694350U
CN207694350U CN201721774709.2U CN201721774709U CN207694350U CN 207694350 U CN207694350 U CN 207694350U CN 201721774709 U CN201721774709 U CN 201721774709U CN 207694350 U CN207694350 U CN 207694350U
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China
Prior art keywords
pipe
filter
filter pipe
filtering
tank
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Expired - Fee Related
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CN201721774709.2U
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Chinese (zh)
Inventor
邱学尧
邱成奇
邱学青
邱学攀
邱学选
邱学山
邱学满
邱成帅
晏林青
谢维峰
晏帅
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Individual
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Individual
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Biological Treatment Of Waste Water (AREA)

Abstract

To improve the treatment effeciency of surface filtration and bio-contact oxidation filtering settling pond, the utility model proposes filter pipe and its filter devices.Its key facility includes collecting-tank, filtering ponds, water pump, filter pipe, return duct, outlet pipe and returns mud pipe and respective valves；Water pump, which enters sewage transport in filter pipe, once to be filtered, excess sludge is discharged through outlet pipe, returned sludge returns to collecting-tank through return duct, the filtrate once filtered is discharged after another filter pipe carries out secondary filter from another outlet pipe, and the sludge in filtering ponds is back to collecting-tank by returning mud pipe；Regular switch valve changes the filtering sequence of filter pipe, and completes backsurging operation.Effective filtration area is improved for separation of solid and liquid, realizes pulling flow type filtering, simplified backwash operation, raising water yield, reduction sludge dewatering amount；Anaerobic biological, aerobic biochemical, precipitation and filtering are combined together for sewage disposal, good sewage processing effect, stable effluent quality.

Description

Filter pipe and its filter device
Technical field
The utility model belongs to purification of water quality and sewage treatment field, more particularly to a kind of filter pipe and its filtering dress It sets.
Background technology
Filtering is to carry out being separated by solid-liquid separation most basic one for the treatment of process in purification of water quality and sewage treatment project, by filtering Medium intercepts the mechanism of solid particle, can divide surface filtration and in-depth filtration.The wherein water yield and filter medium of surface filtration Effective filtration area it is directly proportional, to increase water yield, many surface filtration equipment all increase filter medium by various modes Area, especially materials processing technology improve after, there is hollow-fibre membrane, rolled film, tubular membrane, plate type membrane component and waited Filtering surface accumulates great filtering material.But these filtration facilities are difficult to pulling flow type operation, the backwash operation of filtering material It is complicated.
To increase the effective filtration area of filter medium, realizes the pulling flow type operation of filter process, simplify filter process Backwash operation, the utility model proposes filter pipe and its filter devices.
By that can cultivate biomembrane after increasing filler on filter pipe, filter device gives birth to the common anaerobism of sewage disposal Change processing, aerobic treatment, precipitation and filtration treatment technique combine together, can efficient process sanitary sewage and with its class As stain disease.
Invention content
To improve the treatment effeciency of surface filtration and bio-contact oxidation filtering settling pond, the utility model proposes filterings Pipeline and its filter device.Its key facility includes collecting-tank, filtering ponds, water pump, filter pipe, return duct, outlet pipe and returns Mud pipe and respective valves；Water pump, which enters sewage transport in filter pipe, once to be filtered, and excess sludge is discharged through outlet pipe, is returned It flows sludge and returns to collecting-tank through return duct, the filtrate once filtered is after another filter pipe carries out secondary filter from another water outlet Pipe is discharged, and the sludge in filtering ponds is back to collecting-tank by returning mud pipe；The filtering that regular switch valve changes filter pipe is suitable Sequence, and complete backsurging operation.
The tubular material that filter pipe is made of skeleton and filter cloth；Wherein filter cloth is the filter medium of tubulose, material Including but not limited to fabric, filter membrane and filter screen；Skeleton for keeping the shape of screen pipe constant, the form of skeleton include but It is not limited to bourdon tube, metal establishment pipe, holed metal, welded wire pipe and cellular plastics webmaster；When the resistance to deformation of filter cloth When intensity is met the requirements, then skeleton need not be set.
Filter pipe is arranged in the space for making full use of filtering ponds by bending, stacking and winding, increases effective filtering surface Product；It sets separation and fixed frame between filter pipe, relative position and filtrate channel is vacated between fixed filter pipe.
Filler is set on filter pipe and is convenient for bio-film colonization, is made filtering ponds as bio-contact oxidation filtering settling pond With.
Water pump is substituted using air-lift device, sewage transport is entered into filter pipe, the oxygen in stripping medium is dissolved in sewage Aerobic biochemical reaction occurs, using return duct and returns mud pipe and flows back to digestive juice and sludge, pass through anaerobism, anoxic and aerobic Pollutant in biochemical reaction degradation sewage.
Head-tank is set, filter pipe and its control valve are gone out to pick out from head-tank, by water pump by sewage lifting To head-tank and flow automatically into filter pipe；Aerator is set in head-tank and increases the aerobic life of dissolution of contaminated water oxygen progress Change reaction.
Snorkel is set on filter pipe, introduces air into filter pipe and is filled with secondary filter and biochemical degradation water outlet Tap is touched, and the dissolved oxygen content of water outlet is increased.
To avoid excess sludge from polluting outlet pipe, a special excess sludge pipe is set, excess sludge is discharged.
To balance the water yield of primary filtering and secondary filter, 3 sets and 3 sets of setting or more filter pipe, by opening and closing valve Door and water pump control the filtering sequence of each filter pipe.
The utility model was used for the solid contaminant in drainage, specifically included following procedure：
1）Filtering
Filter pipe valve I, outlet pipe valve I and water outlet tube valve II are opened, filter pipe valve II, return pipe are closed Valve I and return water tube valve II；Start water pump once to be filtered sewage transport to filter pipe I, sludge is through I row of outlet pipe Go out, filtrate carries out second of filtering by filter pipe II in filtering ponds, and clear water is discharged through outlet pipe II, and sludge is logical in filtering ponds It crosses back mud pipe and is back to collecting-tank；
2）Backwash
When filtration resistance is excessive, start backsurging operation；
Filter pipe valve II, water outlet tube valve II and return pipe valve I are opened, filter pipe valve I, return pipe are closed Valve II and outlet pipe valve I；Start water pump once to be backwashed sewage transport to filter pipe II, sludge is through outlet pipe II is discharged, and filtrate carries out second of backwash to filter pipe I in filtering ponds, and backwashing wastewater is back to through return pipe I to catchment Pond；
3）Exchange filtering sequence
After backwash, filtering sequence is exchanged；
Filter pipe valve II, water outlet tube valve II and outlet pipe valve I are opened, filter pipe valve I, return pipe are closed Valve II and return pipe valve I；Start water pump once to be filtered sewage transport to filter pipe II, sludge is through outlet pipe II It is discharged, filtrate carries out second of filtering by filter pipe I in filtering ponds, and clear water is discharged through outlet pipe I, and sludge leads in filtering ponds It crosses back mud pipe and is back to collecting-tank.
The utility model was used for the solid contaminant in drainage, and advantageous effect compared with prior art is：
1, the effective filtration area of filter pipe is big, occupy little space, flexible arrangement, water yield are big；
2, the sludge concentration of filter pipe pulling flow type operation discharge is high, reduces sludge dewatering workload；
3, it is connected using 2 sets of filter pipes, it is ensured that stable effluent quality；
4,2 sets of filter pipes are mutually backwashed, it is not necessary that the backwash system of backwashing pump, backwash pond or complexity is arranged System.
The utility model is used as bio-contact oxidation filtering settling pond, specifically includes following procedure：
1）Bio-contact oxidation filters precipitation reaction
Filter pipe valve I, return pipe valve I, outlet pipe valve I and water outlet tube valve II are opened, filter pipe is closed Valve II and return water tube valve II；Water pump is substituted by sewage transport to head-tank by air-lift device and flow to filter pipe I certainly Once filtering and biochemical degradation are carried out, returned sludge is back to collecting-tank through return pipe I, and excess sludge is discharged through outlet pipe I, mistake Sewage carries out second of filtering and biochemical degradation by filter pipe II in filter tank, and clear water is discharged through outlet pipe II, in filtering ponds Sludge is back to collecting-tank by returning mud pipe；
2）Backwash
When filtration resistance is excessive, start backsurging operation；
Filter pipe valve II, return water tube valve II and return pipe valve I are opened, filter pipe valve I, outlet pipe are closed Valve II and outlet pipe valve I；Water pump is substituted by sewage transport to head-tank by air-lift device and flow to filter pipe II certainly It is once backwashed, backwashing wastewater is discharged into collecting-tank through return pipe II, and filtrate carries out second to filter pipe I in filtering ponds Secondary backwash, backwashing wastewater are back to collecting-tank through return pipe I；
3）Exchange biological contact oxidation filtration precipitation reaction sequence
After backwash, biological contact oxidation filtration precipitation reaction sequence is exchanged；
Filter pipe valve II, return water tube valve II, water outlet tube valve II and outlet pipe valve I are opened, screen pipe is closed Road valve I and return pipe valve I；Water pump is substituted by sewage transport to head-tank by air-lift device and flow to filter pipe II certainly Once filtering and biochemical degradation are carried out, returned sludge is back to collecting-tank through return pipe II, and excess sludge is discharged through outlet pipe II, Sewage carries out second of filtering and biochemical degradation by filter pipe I in filtering ponds, and clear water is discharged through outlet pipe I, in filtering ponds Sludge is back to collecting-tank by returning mud pipe.
The utility model was used for the solid contaminant in drainage, and advantageous effect compared with prior art is：
1, the effective filtration area of filter pipe is big, occupy little space, flexible arrangement, water yield are big；
2, the excess sludge concentration of filter pipe pulling flow type operation discharge is high, reduces excess sludge dewatering work amount；
3, it is connected using 2 sets of filter pipes, it is ensured that stable effluent quality；
4,2 sets of filter pipes are mutually backwashed, it is not necessary that the backwash system of backwashing pump, backwash pond or complexity is arranged System；
5, the filtering ponds of the utility model combine together biochemical reaction, precipitation and filtering, highly integrated, improve dirt The volumetric loading of water process reduces investment and the operating cost of sewage disposal.
Description of the drawings
Fig. 1 is the horizontal layout schematic diagram of the utility model；
Fig. 2 is the A-A sectional view schematic diagrames of the utility model；
Wherein, water inlet pipe 1, collecting-tank, 2, filtering ponds 3, water pump 4, filter pipe valve I 5-1, I 6-1 of filter pipe are returned I 7-1 of flow tube, return duct valve I 8-1, I 9-1 of outlet pipe, outlet pipe valve I 10-1, II 5-2 of filter pipe valve, filter pipe II 6-2, II 7-2 of return duct, flow back II 8-2 of tube valve, II 9-2 of outlet pipe, is discharged II 10-2 of tube valve, returns mud pipe 11, returns mud Tube valve 12.
Specific implementation mode
Embodiment 1, the utility model were used for the solid contaminant in drainage.
To improve the treatment effeciency of surface filtration, the utility model proposes filter pipe and its filter devices.It is main Facility includes collecting-tank, filtering ponds, water pump, filter pipe, return duct, outlet pipe and returns mud pipe and respective valves；Water pump will be dirty Water is conveyed into filter pipe and is once filtered, and excess sludge is discharged through outlet pipe, and returned sludge catchments through return duct return Pond, the filtrate once filtered are discharged after another filter pipe carries out secondary filter from another outlet pipe, the sludge in filtering ponds It is back to collecting-tank by returning mud pipe；Regular switch valve changes the filtering sequence of filter pipe, and completes backsurging operation.
The tubular material that filter pipe is made of skeleton and filter cloth；Wherein filter cloth is the filter medium of tubulose, material Including but not limited to fabric, filter membrane and filter screen；Skeleton for keeping the shape of screen pipe constant, the form of skeleton include but It is not limited to bourdon tube, metal establishment pipe, holed metal, welded wire pipe and cellular plastics webmaster；When the resistance to deformation of filter cloth When intensity is met the requirements, then skeleton need not be set.
Filter pipe is arranged in the space for making full use of filtering ponds by bending, stacking and winding, increases effective filtering surface Product；It sets separation and fixed frame between filter pipe, relative position and filtrate channel is vacated between fixed filter pipe.
One head-tank is set, filter pipe and its control valve are gone out to pick out from head-tank, is carried sewage by water pump It rises to head-tank and flows automatically into filter pipe.
To avoid sludge pollution outlet pipe, a special sludge pipe is set, sludge is discharged.
To balance the water yield of primary filtering and secondary filter, 3 sets and 3 sets of setting or more filter pipe, by opening and closing valve Door and water pump control the filtering sequence of each filter pipe.
The utility model was used for the solid contaminant in drainage, specifically included following procedure：
1）Filtering
Filter pipe valve I 5-1, outlet pipe valve I 10-1 and water outlet II 10-2 of tube valve are opened, filter pipe valve is closed II 5-2 of door, II 8-2 of return pipe valve I 8-1 and return water tube valve；Start water pump 4 to carry out sewage transport to I 6-1 of filter pipe Primary filtering, sludge are discharged through I 9-1 of outlet pipe, and filtrate by II 6-2 of filter pipe filter for the second time in filtering ponds 3, clearly Water is discharged through II 9-2 of outlet pipe, and sludge is back to collecting-tank 2 by returning mud pipe 11 in filtering ponds 3；
2）Backwash
When filtration resistance is excessive, start backsurging operation；
II 5-2 of filter pipe valve, water outlet II 10-2 of tube valve and return pipe valve I 8-1 are opened, filter pipe valve is closed I 5-1 of door, II 8-2 of return water tube valve and outlet pipe valve I 10-1；Start water pump 4 by sewage transport to II 6-2 of filter pipe into The primary backwash of row, sludge are discharged through II 9-2 of outlet pipe, and filtrate recoils to I 6-1 of filter pipe progress for second in filtering ponds 3 It washes, backwashing wastewater is back to collecting-tank 2 through I 7-1 of return pipe；
3）Exchange filtering sequence
After backwash, filtering sequence is exchanged；
II 5-2 of filter pipe valve, water outlet II 10-2 of tube valve and outlet pipe valve I 10-1 are opened, filter pipe is closed Valve I 5-1, II 8-2 of return water tube valve and return pipe valve I 8-1；Start water pump 4 by sewage transport to II 6-2 of filter pipe into The primary filtering of row, sludge are discharged through II 9-2 of outlet pipe, and filtrate is filtered for second by I 6-1 of filter pipe progress in filtering ponds 3, Clear water is discharged through I 9-1 of outlet pipe, and sludge is back to collecting-tank 2 by returning mud pipe 11 in filtering ponds 3.
Embodiment 2, the utility model are used as bio-contact oxidation filtering settling pond.
To improve the treatment effeciency of bio-contact oxidation filtering settling pond, the utility model proposes filter pipe and its mistakes Filter device.Its key facility includes collecting-tank, filtering ponds, water pump, filter pipe, return duct, outlet pipe and returns mud pipe and corresponding Valve；Water pump, which enters sewage transport in filter pipe, once to be filtered, and excess sludge is discharged through outlet pipe, and returned sludge passes through back Flow tube returns to collecting-tank, and the filtrate once filtered is discharged after another filter pipe carries out secondary filter from another outlet pipe, mistake Sludge in filter tank is back to collecting-tank by returning mud pipe；Regular switch valve changes the filtering sequence of filter pipe, and completes Backsurging operation.
The tubular material that filter pipe is made of skeleton and filter cloth；Wherein filter cloth is the filter medium of tubulose, material Including but not limited to fabric, filter membrane and filter screen；Skeleton for keeping the shape of screen pipe constant, the form of skeleton include but It is not limited to bourdon tube, metal establishment pipe, holed metal, welded wire pipe and cellular plastics webmaster；When the resistance to deformation of filter cloth When intensity is met the requirements, then skeleton need not be set.
Filter pipe is arranged in the space for making full use of filtering ponds by bending, stacking and winding, increases effective filtering surface Product；It sets separation and fixed frame between filter pipe, relative position and filtrate channel is vacated between fixed filter pipe.
Filler is set on filter pipe and is convenient for bio-film colonization, is made filtering ponds as bio-contact oxidation filtering settling pond With.
Water pump is substituted using air-lift device, sewage transport is entered into screen pipe, the oxygen in stripping medium, which is dissolved in sewage, to be sent out Raw aerobic biochemical reaction increases dissolved oxygen in filtering ponds setting aerator and strengthens aerobic biochemical reaction, using return duct and returns Mud pipe flows back to digestive juice and sludge, the pollutant in sewage of being degraded by anaerobism, anoxic and aerobic biochemical reaction.
Head-tank is set, filter pipe and its control valve are gone out to pick out from head-tank, by water pump by sewage lifting To head-tank and flow automatically into filter pipe；Aerator is set in head-tank and increases the aerobic life of dissolution of contaminated water oxygen progress Change reaction.
Snorkel is set on filter pipe, introduces air into filter pipe and is filled with secondary filter and biochemical degradation water outlet Tap is touched, and the dissolved oxygen content of water outlet is increased.
To avoid excess sludge from polluting outlet pipe, a special excess sludge pipe is set, excess sludge is discharged.
To balance the water yield of primary filtering and secondary filter, 3 sets and 3 sets of setting or more filter pipe, by opening and closing valve Door and water pump control the filtering sequence of each filter pipe.
The utility model is used as bio-contact oxidation filtering settling pond, specifically includes following procedure：
1）Bio-contact oxidation filters precipitation reaction
Open filter pipe valve I 5-1, II 10- of return pipe valve I 8-1, outlet pipe valve I 10-1 and water outlet tube valve 2, close II 5-2 and II 8-2 of return water tube valve of filter pipe valve；Water pump 4 is substituted by sewage transport a to high position by air-lift device Pond simultaneously carries out once filtering and biochemical degradation from I 6-1 of filter pipe is flow to, and returned sludge is back to through I 7-1 of return pipe to catchment Pond 2, excess sludge are discharged through I 9-1 of outlet pipe, and sewage carries out second of filtering and life by II 6-2 of filter pipe in filtering ponds 3 Change degradation, clear water is discharged through II 9-2 of outlet pipe, and sludge is back to collecting-tank 2 by returning mud pipe 11 in filtering ponds 3；
2）Backwash
II 5-2 of filter pipe valve, II 8-2 of return water tube valve and return pipe valve I 8-1 are opened, filter pipe valve is closed I 5-1 of door, water outlet II 10-2 of tube valve and outlet pipe valve I 10-1；Water pump 4 is substituted by sewage transport a to high position by air-lift device Pond is simultaneously once backwashed from II 6-2 of filter pipe is flow to, and backwashing wastewater is discharged into collecting-tank 2, mistake through II 7-2 of return pipe Filtrate carries out second of backwash to I 6-1 of filter pipe in filter tank 3, and backwashing wastewater is back to collecting-tank through I 7-1 of return pipe 2；
3）Exchange biological contact oxidation filtration precipitation reaction order
Open II 5-2 of filter pipe valve, II 8-2 of return water tube valve, water outlet II 10-2 of tube valve and outlet pipe valve I 10-1 closes filter pipe valve I 5-1 and return pipe valve I 8-1；Water pump 4 is substituted by sewage transport a to high position by air-lift device Simultaneously from flowing to, II 6-2 of filter pipe once filter and biochemical degradation, returned sludge are back to collection through II 7-2 of return pipe in pond Pond 2, excess sludge are discharged through II 9-2 of outlet pipe, in filtering ponds 3 sewage by I 6-1 of filter pipe carry out second of filtering and Biochemical degradation, clear water are discharged through I 9-1 of outlet pipe, and sludge is back to collecting-tank 2 by returning mud pipe 11 in filtering ponds 3.

Claims (9)

1. filter pipe and its filter device, it is characterised in that key facility include collecting-tank, filtering ponds, water pump, filter pipe, Return duct, outlet pipe and time mud pipe and respective valves；Water pump, which enters sewage transport in filter pipe, once to be filtered, remaining dirty Mud is discharged through outlet pipe, and returned sludge returns to collecting-tank through return duct, and the filtrate once filtered carries out two through another filter pipe It is discharged from another outlet pipe after secondary filtering, the sludge in filtering ponds is back to collecting-tank by returning mud pipe；Periodically pass through switching valve Door changes the filtering sequence of filter pipe, and completes backsurging operation.
2. filter pipe as described in claim 1 and its filter device, it is characterised in that filter pipe is by skeleton and filter cloth The tubular material of composition；Wherein filter cloth is the filter medium of tubulose, and material includes but not limited to fabric, filter membrane and filtering Net；For skeleton for keeping the shape of screen pipe constant, the form of skeleton includes but not limited to bourdon tube, metal establishment pipe, perforation Metal tube, welded wire pipe and cellular plastics webmaster；When the resistance to deformation intensity of filter cloth is met the requirements, then bone need not be set Frame.
3. filter pipe as described in claim 1 and its filter device, it is characterised in that make full use of the space of filtering ponds, lead to Bending is crossed, stacks and winds to arrange filter pipe, increases effective filtration area；Separation and fixation are set between filter pipe Frame relative position and vacates filtrate channel between fixed filter pipe.
4. filter pipe as described in claim 1 and its filter device, it is characterised in that filler is arranged just on filter pipe In bio-film colonization, used filtering ponds as bio-contact oxidation filtering settling pond.
5. filter pipe as described in claim 1 and its filter device, it is characterised in that substituting water pump using air-lift device will Sewage transport enters filter pipe, and the oxygen in stripping medium, which is dissolved in sewage, occurs aerobic biochemical reaction, using return duct and It returns mud pipe to flow back to digestive juice and sludge, the pollutant in sewage of degrading by anaerobism, anoxic and aerobic biochemical reaction.
6. filter pipe as described in claim 1 and its filter device, it is characterised in that one head-tank of setting, by screen pipe Road and its control valve go out to pick out from head-tank, by sewage lifting to head-tank and are flow automatically into filter pipe by water pump； Aerator is set in head-tank and increases the progress aerobic biochemical reaction of dissolution of contaminated water oxygen.
7. filter pipe as described in claim 1 and its filter device, it is characterised in that snorkel is set on filter pipe, It introduces air into filter pipe and is come into full contact with secondary filter and biochemical degradation water outlet, increase the dissolved oxygen content of water outlet.
8. filter pipe as described in claim 1 and its filter device, it is characterised in that avoid excess sludge pollution water outlet Pipe is arranged a special excess sludge pipe, excess sludge is discharged.
9. filter pipe as described in claim 1 and its filter device, it is characterised in that for the primary filtering of balance and secondary mistake The water yield of filter, 3 sets and 3 sets of setting or more filter pipe, filtering that each filter pipe is controlled by opening/shutting valve and water pump are suitable Sequence.
CN201721774709.2U 2017-12-19 2017-12-19 Filter pipe and its filter device Expired - Fee Related CN207694350U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721774709.2U CN207694350U (en) 2017-12-19 2017-12-19 Filter pipe and its filter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721774709.2U CN207694350U (en) 2017-12-19 2017-12-19 Filter pipe and its filter device

Publications (1)

Publication Number Publication Date
CN207694350U true CN207694350U (en) 2018-08-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721774709.2U Expired - Fee Related CN207694350U (en) 2017-12-19 2017-12-19 Filter pipe and its filter device

Country Status (1)

Country Link
CN (1) CN207694350U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107875708A (en) * 2017-12-19 2018-04-06 邱学尧 Filter pipe and its filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107875708A (en) * 2017-12-19 2018-04-06 邱学尧 Filter pipe and its filter
CN107875708B (en) * 2017-12-19 2024-07-05 重庆丰都三和实业有限公司 Filter pipeline and filter device thereof

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20180807

Termination date: 20191219