CN104771946A - Novel full-automatic back-washing pulse filter - Google Patents
Novel full-automatic back-washing pulse filter Download PDFInfo
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- CN104771946A CN104771946A CN201510180598.1A CN201510180598A CN104771946A CN 104771946 A CN104771946 A CN 104771946A CN 201510180598 A CN201510180598 A CN 201510180598A CN 104771946 A CN104771946 A CN 104771946A
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- suction nozzle
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Abstract
The invention discloses a novel full-automatic back-washing pulse filter. The novel full-automatic back-washing pulse filter comprises a main filter support, a filtering core and a suction nozzle, wherein the filtering core comprises an inner support and multiple filter screen layers, the inner support comprises a barrel body, multiple zoning angle plates are buckled on the cylindrical surface of the barrel body axially, multiple filter screen layers are arranged at the periphery of multiple zoning angle plates, two adjacent zoning angle plates form a dirt storage area, the main filter support is arranged outside the filtering core in a sheathing manner, a filtering area is formed inside the inner support, multiple dirt storage areas are arranged between the inner support and multiple filter screen layers, a clean water area is formed between multiple filter screen layers and the main filter support, the suction opening of the suction nozzle is attached onto the inner wall of the inner support, multiple water holes are distributed in the cylindrical surface of the barrel body between two adjacent zoning angle plates, and the suction opening is of a fine strip shape, extends along the axis of the barrel body and corresponds to multiple water holes between the zoning angle plates; during back washing, the suction opening of the suction nozzle is attached onto the inner wall of the inner support, zero water pressure is formed inside the suction nozzle, the back-washing pressure difference is more than the filtering pressure difference, and zoning back washing is formed, the back washing effect is improved, abrasion is reduced and replacement and back-washing operation are relatively easy.
Description
The present invention is application number is 201210323856.3, and the applying date is on September 4th, 2012, and denomination of invention is the division of " pulse full-automatic backwash filter ".
Technical field
The present invention relates to a kind of filter, particularly relate to a kind of Novel pulse full-automatic back washing filter.
Background technology
Traditional full-automatic back washing filter comprises the filter core of filter main support, suction nozzle and cylindrical structure, filter core comprises filter screen, filter screen surrounds tubular and is arranged on filter main support, and suction nozzle is arranged in this filter screen, and the suction inlet of suction nozzle contacts with the inner surface of filter screen or do not contact.Filter main support is also provided with water inlet, delivery port and sewage draining exit.
When adopting traditional full-automatic back washing filter to filter, close sewage draining exit and suction nozzle to stop not turning, water enters the inside of filter main support from water inlet, under the effect of the pressure reduction of hydraulic pressure, water is discharged, for production and application from delivery port after multistorey strainer mesh filters from the inside of filter main support.During backwash, open sewage draining exit and rotary suction nozzle, because the hydraulic pressure in suction nozzle is less than filter core inside water pressure, under the effect of the pressure reduction of hydraulic pressure, water is finally discharged to outside filter by the suction inlet of suction nozzle and sewage draining exit, thus carries out surface clean to filter screen.
There is following problem in the backwash of this structure:
1, the dirt rested on filter screen again can be compressed into filter screen by the rotary machine power of the suction nozzle rotated, and press more real and more real, dirt not easy-clear during anti-cleaning filter screen;
2, the rotary machine power meeting direct friction filter screen of suction nozzle, increases the loss of filter screen;
3, because the outer surface of filter screen is the face of cylinder, suction nozzle cannot realize subregion cleaning to filter screen, and cleaning is not concentrated, and cleaning performance is poor;
Even if the suction inlet of 4 suction nozzles and filter screen close contact, also cannot realize zero hydraulic pressure when recoiling draining, the pressure reduction of backwash cannot be made to be greater than filtration pressure difference, and the effect of backwash is poor.The suction inlet pressure of suction nozzle is less than the rear hydraulic pressure of filter, therefore after filter, water can not flow to suction inlet, does not have backwash effect.
5, as suction nozzle suction inlet does not contact with filter screen, then backwash is more inoperative, and the suction inlet pressure because of suction nozzle is pressure before filtering, and before filter, pressure is greater than the rear pressure of filter, therefore at all cannot backwash.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of can improve backwash effect and reduce filter screen wearing and tearing Novel pulse full-automatic back washing filter.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of Novel pulse full-automatic back washing filter, comprise the filter main support of cylindrical structure, the filter core of cylindrical structure, and suction nozzle, the inner support that described filter core comprises cylindrical structure and the multistorey strainer mesh be around in outside this inner support, described inner support comprises cylindrical shell, and its axis of the outer, the face of cylinder of cylindrical shell is buckled with multiple subregion gusset, be arranged with multistorey strainer mesh outside multiple subregion gusset, make to form Cun Wu district between adjacent two subregion gussets; Filter main support is enclosed within outside filter core, inner support inside forms filtering area, multiple Cun Wu district is provided with between inner support and multistorey strainer mesh, clear water zone is formed between multistorey strainer mesh and filter main support, filter main support is provided with water inlet, delivery port and sewage draining exit, water inlet, filtering area, Cun Wu district, clear water zone are communicated with successively with delivery port, and Qie Cunwu district is communicated with sewage draining exit; Described suction nozzle is arranged in inner support, and the suction inlet of this suction nozzle is attached on the inwall of inner support, and this suction nozzle is with the impurity near Nei Hecunwu district of Rotational Absorption Cun Wu district and the mode draining into sewage draining exit is arranged on filter main support; Multiple water hole is laid on the face of cylinder of the cylindrical shell between adjacent two subregion gussets; The suction inlet of described suction nozzle is fine strip shape and extends along tubular axis, and the multiple water holes between corresponding above-mentioned adjacent two subregion gussets are arranged.
Described suction nozzle is arranged on described filter main support by rotating shaft.
Described suction nozzle by two sheet materials along rotating shaft axis extend form funnel-form.
Described two sheet materials are flexible sheet.
After adopting said structure, a kind of Novel pulse full-automatic back washing filter of the present invention has following beneficial effect: when filtering, close sewage draining exit and suction nozzle non rotating, water enters the filtering area of inner support inside from water inlet, under the effect of pressure reduction, then water discharge from delivery port from entering clear water zone from filtering area after multistorey strainer mesh filters successively.When cleaning filter screen is counter, first, open sewage draining exit and rotary suction nozzle, when the suction inlet of suction nozzle rotates to place of a certain Cun Wu district, because the hydraulic pressure in suction nozzle is zero hydraulic pressure, the impurity retained in this Cun Wu district and dirt, and the water near suction nozzle is under the effect of the pressure reduction of hydraulic pressure, finally be discharged outside filter by the suction inlet of suction nozzle and sewage draining exit successively, thus effective backwash is carried out to the water in above-mentioned Cun Wu district.Then, suction nozzle continues to rotate to next Cun Wu district, and carries out backwash to this Cun Wu district.Circulation like this, can carry out backwash to Ge Cunwu district one by one.When adopting backwash of the present invention, the suction inlet due to suction nozzle is attached on the inwall of inner support, and the suction inlet of suction nozzle and inner support are fitted, therefore water during backwash before filter does not enter in the suction inlet of suction nozzle, so ensure that the suction inlet hydraulic pressure of suction nozzle is less than the rear hydraulic pressure of filter; When backwash, after filter, water is because of the relation of pressure reduction, and nature flows to suction nozzle by filter screen, be zero hydraulic pressure in suction nozzle, the hydraulic pressure in Cun Wu district is substantially equal to backwash pressure reduction, and such backwash pressure reduction is greater than filtration pressure difference during filtration, subregion backwash can be carried out to filter screen, and better backwash effect can be reached.And, filter screen and suction nozzle contactless, the wearing and tearing of filter screen can be reduced, and be easier to change and backwash.
Accompanying drawing explanation
View when Fig. 1 is the filtration of a kind of Novel pulse full-automatic back washing filter of the present invention;
View when Fig. 2 is the anti-cleaning of a kind of Novel pulse full-automatic back washing filter of the present invention;
Fig. 3 is the decomposing schematic representation of a kind of Novel pulse full-automatic back washing filter of the present invention;
Fig. 4 is the structural representation of the inner support in the present invention;
Fig. 5 is the assembling schematic diagram of suction nozzle in the present invention and filter core;
Fig. 6 is the structural representation of the rotating shaft spindle nose locator in the present invention.
In figure:
Filter main support 1 water inlet 10a
Delivery port 10b sewage draining exit 10c
Blowdown room 11 pulse draining valve 12
Filter core 2 filtering area 20a
20b clear water zone, Cun Wu district 20c
Inner support 21 cylindrical shell 211
Subregion gusset 212 water hole 213
Filter screen 22 suction nozzle 3
Rotating shaft 31 water cavity 32
Rotating shaft spindle nose locator 33 water hole 34
Detailed description of the invention
In order to explain technical scheme of the present invention further, below by specific embodiment, the present invention will be described in detail.
As shown in Figures 1 to 6, a kind of Novel pulse full-automatic back washing filter of the present invention, comprises filter main support 1, filter core 2 and suction nozzle 3.
Filter main support 1 adopts cylindrical structure, and filter main support 1 is enclosed within outside the filter core 2 of cylindrical structure.
The inner support 21 that filter core 2 comprises cylindrical structure and the multistorey strainer mesh 22 be around in outside inner support 21, inner support 21 inside forms filtering area 20a, Cun Wu district 20b is provided with between inner support 21 and multistorey strainer mesh 22, clear water zone 20c is formed between multistorey strainer mesh 22 and filter main support 1, filter main support 1 is provided with water inlet 10a, delivery port 10b and sewage draining exit 10c, water inlet 10a, filtering area 20a, Cun Wu district 20b, clear water zone 20c are communicated with successively with delivery port 10b, and Qie Cunwu district 20b is communicated with sewage draining exit 10c.
As a preferred embodiment of the present invention, inner support 21 comprises cylindrical shell 211, its axis of the outer, the face of cylinder of cylindrical shell 211 is buckled with multiple subregion gusset 212, form Cun Wu district 20b between adjacent two subregion gussets 212, multiple water hole 213 is laid on the face of cylinder of the cylindrical shell 211 between adjacent two subregion gussets 212.Preferably, the water hole 213 that a Ge Cunwu district 20b is corresponding arranges in a row, and the water hole 213 between adjacent three subregion gussets 212 is laid staggeredly.Multistorey strainer mesh 22 is sticked outside subregion gusset 212, the mesh of multistorey strainer mesh 22 is changed less by as many as from the inside to the outside, the many filter screen 22 of mesh is near inner support 21, the sealing function with inner support 21 can be played better, foreign material in water, by flowing to suction nozzle 3 herein, can be blocked in Cun Wu district 20b by the water reducing filtering area 20a.
Suction nozzle 3 is arranged in inner support 21, and suction nozzle 3 to be extended along the axis of rotating shaft 31 by two panels flexible sheet and forms funnel-form, and the longitudinal end of flexible sheet forms suction inlet.The suction inlet of suction nozzle 3 is attached on the inwall of inner support 21, and suction nozzle 3 with the impurity near Rotational Absorption Cun Wu district 20b Nei Hecunwu district 20b and the mode draining into sewage draining exit 10c be arranged on filter main support 1.One end that water inlet 10a is pointed in rotating shaft 31 is provided with rotating shaft spindle nose locator 33, rotating shaft spindle nose locator 33 has the water hole 34 of supplying water and passing through, the axiality of rotating shaft 31 can be ensured by rotating shaft spindle nose locator 33, make suction nozzle 3 accurately aim at an osculum 213 of Ge Cunwu district 20b.Preferably, the suction inlet of suction nozzle 3 forms soft contact with the inner tube wall of cylindrical shell 211.
As a preferred embodiment of the present invention, the suction inlet of suction nozzle 3 is fine strip shape and along cylindrical shell 211 Axis Extension, and the multiple water holes 213 between corresponding adjacent two subregion gussets 212 are arranged.Suction nozzle 3 is arranged on filter main support 1 by rotating shaft 31, is provided with the water cavity 32 being communicated with suction nozzle 3 and sewage draining exit 10c in rotating shaft 31.Preferably, rotating shaft 31 is provided with the positioner in the restriction corresponding water hole 213 of suction nozzle 3.By positioner, make the suction inlet of suction nozzle 3 aim at water hole 213 more accurately, the water route of backwash is better unobstructed, and then clean rate during raising backwash.Certainly, above-mentioned positioner also realizes by electric control gear, and such as above-mentioned positioner adopts sensor structure, after electric control part described later divides the suction inlet of the suction nozzle 3 receiving inductor to aim at the signal in water hole 213, sending instruction makes rotating shaft 31 stop operating, to filter screen 22 backwash a period of time.
Filter main support 1 is also provided with blowdown room 11, and sewage draining exit 10c is arranged on the bottom of blowdown room 11, and sewage draining exit 10c place is provided with pulse draining valve 12.Rotating shaft 31 stretches into blowdown room 11 through after cylindrical shell 211, and in rotating shaft 31, corresponding blowdown room 11 is provided with mudhole.
In addition, the automatically controlled part of filter adopts existing structure, and it mainly comprises control centre, rotating shaft variable speed electric motors, particularly, automatic control electric Ore-controlling Role, the rotating shaft navigation system of backwash suction nozzle, intake pressure inductor and discharge pressure inductor etc.Control centre receives the signal of intake pressure inductor and discharge pressure inductor, and control centre also correspondingly with the rotating shaft navigation system of automatic control electric Ore-controlling Role and backwash suction nozzle to connect.Control centre also controls the rotating speed of rotating shaft variable speed electric motors, particularly and the start and stop of pulse draining valve 12.The automatically controlled part of filter, as known technology, does not repeat them here.
When employing the present invention normally works and filters, close pulse draining valve 12, and rotating shaft 31 non rotating.Sewage, water containing impurity or to enter the cylindrical shell 211 filtering area 20a of filter core 2 from the water hole 34 water inlet 10a, rotating shaft spindle nose locator 33 from the water at water source inner, because the hydraulic pressure of cylindrical shell 211 filtering area 20a is 3 kg/cm, i.e. 0.3MPa, hydraulic pressure in the 20c of clear water zone is 2 kg/cm, under differential pressure action, water enters clear water zone 20c by the water hole 213 on cylindrical shell 211 after multistorey strainer mesh 22 filters, finally discharge clean water from delivery port 10b, use for production, agricultural, life.
When after work a period of time, intake pressure is constant and discharge pressure diminishes, and when pressure reduction reaches certain setting value, starts automatic back-washing function.
First, water enters from water inlet 10a, open pulse draining valve 12 and rotating shaft 31, rotating shaft 31 drives the suction nozzle 3 on it to rotate together, when the suction inlet of suction nozzle 3 rotates to osculum 213 place at 20b place of a certain Cun Wu district, rotating shaft 31 stays for some time for backwash, time is adjustable, because the hydraulic pressure in suction nozzle 3 is 0 hydraulic pressure, the impurity retained in this Cun Wu district 20b and dirt, under the effect of the rear 2 kilograms of hydraulic pressure of filter, after filter, water passes through filter screen 22 successively, the suction inlet of suction nozzle 3, water cavity 32 in rotating shaft 31 and the above-mentioned mudhole in rotating shaft 31 enter blowdown room 11, finally by outside pulse draining valve 12 discharge filter, thus effective backwash is carried out to the water in above-mentioned Cun Wu district 20b.After filter, water is constantly in a pulsed fashion by filter screen 22, thus reaches the object of clean filter screen.
Secondly, rotating shaft 31 continues rotate and drive the suction nozzle 3 on it to rotate to the osculum 213 at 20b place of next Cun Wu district together, and carries out backwash to this Cun Wu district 20b.Circulation like this, can carry out backwash to Ge Cunwu district 20b one by one.
Because the water hole 213 on inner support 21 is laid staggeredly, such axle turns 31 rotations when moving, and the surface of inner support 21 can be swept next row water hole 213 in by suction nozzle 3 if any dirt and be got rid of by backwash, and rotating shaft 31 is also not easily stuck.On the face of cylinder of inner support 21, button establishes subregion gusset 212, can form multiple non-interfering Cun Wu district 20b, by Ge Cunwu district 20b backwash one by one, can improve cleaning performance.Preferably, the quantity of Cun Wu district 20b is set according to the size of filter core 2 and specification, if the diameter of cylindrical shell 211 can arrange more greatly comparatively multi partition gusset 212.Enclose filter screen 22 outside inner support 21, because filter screen 22 and suction nozzle 3 are contactless, filter screen 22 can be reduced and wear and tear, and be easier to change and backwash.
The present invention utilizes the water outlet pressure reduction of filtered water and subregion cleaning to carry out pulse backwashing to filter screen 22, during backwash, owing to being zero hydraulic pressure in suction nozzle 3, the hydraulic pressure in Cun Wu district 20b is substantially equal to backwash pressure reduction, and such backwash pressure reduction is greater than filtration pressure difference during filtration.When particularly backwash realizes backwash by pulse draining valve 12, pulsating water pressure, can reach better backwash effect.In addition, because adopting subregion backwash, therefore pressure drop during backwash is little, can divide 40-80 district, be equivalent to the filter area change of 1.25%-2.5%.
In sum, a kind of Novel pulse full-automatic back washing filter of the present invention has the following advantages:
1, the dirt rested on filter screen 22 directly can not contact with suction nozzle 3;
2, the inwall of the cylindrical shell 211 of inner support 21 can be processed with suction nozzle 3 concentricity tolerance is the precision of 10, add being flexible coupling on the suction inlet of suction nozzle 3, suction inlet and the cylindrical shell 211 of suction nozzle 3 form close contact, effective seal isolation effect is played during backwash, water is play not, and then realize in backwash suction nozzle 3 being draining zero hydraulic pressure, be conducive to improving anti-cleaning performance;
3, suction nozzle 3 does not directly contact with filter screen 22, therefore can not damage filter screen 22;
4, because of outer thick structure thin in the unique design of inner support 21 and filter screen 22, the object of subregion can be reached, and can form the Cun Wu district 20b hiding dirt, water mutual play during backwash, economize on water, quick, effective;
5, because being draining zero hydraulic pressure in backwash suction nozzle 3, pulse draining valve 12 can be installed additional in discharge outlet, thus reaching the backwash pressure reduction higher than filtration pressure difference, thoroughly can clean filter screen 22 with pulse while subregion backwash.
Above-described embodiment and accompanying drawing non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.
Claims (4)
1. a Novel pulse full-automatic back washing filter, comprise the filter main support of cylindrical structure, the filter core of cylindrical structure, and suction nozzle, it is characterized in that: the inner support that described filter core comprises cylindrical structure and the multistorey strainer mesh be around in outside this inner support, described inner support comprises cylindrical shell, and its axis of the outer, the face of cylinder of cylindrical shell is buckled with multiple subregion gusset, be arranged with multistorey strainer mesh outside multiple subregion gusset, make to form Cun Wu district between adjacent two subregion gussets; Filter main support is enclosed within outside filter core, inner support inside forms filtering area, multiple Cun Wu district is provided with between inner support and multistorey strainer mesh, clear water zone is formed between multistorey strainer mesh and filter main support, filter main support is provided with water inlet, delivery port and sewage draining exit, water inlet, filtering area, Cun Wu district, clear water zone are communicated with successively with delivery port, and Qie Cunwu district is communicated with sewage draining exit; Described suction nozzle is arranged in inner support, and the suction inlet of this suction nozzle is attached on the inwall of inner support, and this suction nozzle is with the impurity near Nei Hecunwu district of Rotational Absorption Cun Wu district and the mode draining into sewage draining exit is arranged on filter main support; Multiple water hole is laid on the face of cylinder of the cylindrical shell between adjacent two subregion gussets; The suction inlet of described suction nozzle is fine strip shape and extends along tubular axis, and the multiple water holes between corresponding above-mentioned adjacent two subregion gussets are arranged.
2. Novel pulse full-automatic back washing filter as claimed in claim 1, is characterized in that: described suction nozzle is arranged on described filter main support by rotating shaft.
3. Novel pulse full-automatic back washing filter as claimed in claim 2, is characterized in that: described suction nozzle to be extended along the axis of rotating shaft by two sheet materials and forms funnel-form.
4. Novel pulse full-automatic back washing filter as claimed in claim 3, is characterized in that: described two sheet materials are flexible sheet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210323856.3A CN102824775B (en) | 2012-09-04 | 2012-09-04 | Pulse full-automatic backwash filter |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210323856.3A Division CN102824775B (en) | 2012-09-04 | 2012-09-04 | Pulse full-automatic backwash filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104771946A true CN104771946A (en) | 2015-07-15 |
| CN104771946B CN104771946B (en) | 2016-04-27 |
Family
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510180538.XA Active CN104785005B (en) | 2012-09-04 | 2012-09-04 | Improve pulse full-automatic backwash filter |
| CN201210323856.3A Active CN102824775B (en) | 2012-09-04 | 2012-09-04 | Pulse full-automatic backwash filter |
| CN201510180598.1A Active CN104771946B (en) | 2012-09-04 | 2012-09-04 | Pulse full-automatic backwash filter |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510180538.XA Active CN104785005B (en) | 2012-09-04 | 2012-09-04 | Improve pulse full-automatic backwash filter |
| CN201210323856.3A Active CN102824775B (en) | 2012-09-04 | 2012-09-04 | Pulse full-automatic backwash filter |
Country Status (1)
| Country | Link |
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| CN (3) | CN104785005B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430371B (en) * | 2016-12-09 | 2023-05-12 | 中冶赛迪工程技术股份有限公司 | Filter device and blast furnace slag flushing water filter |
| CN110180250A (en) * | 2019-06-25 | 2019-08-30 | 鹿海洋 | Floatation element and floating material intercepting system for backwash |
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| JPS5684605A (en) * | 1979-12-12 | 1981-07-10 | Kanagawa Kiki Kogyo Kk | Multicylinder type automatic backwashing filter |
| CN1471994A (en) * | 2002-07-31 | 2004-02-04 | 中国农业大学 | Backwash net-type filter |
| CN101822918A (en) * | 2010-03-31 | 2010-09-08 | 李立功 | Multipath sewage filtering apparatus |
| CN201799154U (en) * | 2010-08-19 | 2011-04-20 | 新疆天业（集团）有限公司 | Self-suction backwash filter |
| CN102216425A (en) * | 2008-12-18 | 2011-10-12 | 国际壳牌研究有限公司 | Process for removing asphaltenic particles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2144921C (en) * | 1994-03-25 | 2000-05-23 | Torgeir Buodd | Self-cleaning fume extraction device |
| CZ281638B6 (en) * | 1994-09-30 | 1996-11-13 | Petr Ing. Štěpánek | Filtering plant, particularly for final treatment of waste water |
| CN1146923A (en) * | 1995-10-05 | 1997-04-09 | 彼得·斯捷提潘内克 | Filtering plant particularly for final treatment of waste water |
| CA2278433C (en) * | 1999-06-22 | 2009-12-01 | Robert Koopmans | Improved filter system |
| CN2431941Y (en) * | 2000-07-21 | 2001-05-30 | 王克涛 | Hand controlled conversion type backwashing water filter |
| CN2464423Y (en) * | 2001-02-14 | 2001-12-12 | 王克涛 | Horizontal counter-washing water filter |
| CN202844685U (en) * | 2012-09-04 | 2013-04-03 | 福建百川资源再生科技有限公司 | Pulse full-automatic backwashing filter |
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2012
- 2012-09-04 CN CN201510180538.XA patent/CN104785005B/en active Active
- 2012-09-04 CN CN201210323856.3A patent/CN102824775B/en active Active
- 2012-09-04 CN CN201510180598.1A patent/CN104771946B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5684605A (en) * | 1979-12-12 | 1981-07-10 | Kanagawa Kiki Kogyo Kk | Multicylinder type automatic backwashing filter |
| CN1471994A (en) * | 2002-07-31 | 2004-02-04 | 中国农业大学 | Backwash net-type filter |
| CN102216425A (en) * | 2008-12-18 | 2011-10-12 | 国际壳牌研究有限公司 | Process for removing asphaltenic particles |
| CN101822918A (en) * | 2010-03-31 | 2010-09-08 | 李立功 | Multipath sewage filtering apparatus |
| CN201799154U (en) * | 2010-08-19 | 2011-04-20 | 新疆天业（集团）有限公司 | Self-suction backwash filter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104785005B (en) | 2016-08-24 |
| CN104771946B (en) | 2016-04-27 |
| CN102824775A (en) | 2012-12-19 |
| CN102824775B (en) | 2016-03-02 |
| CN104785005A (en) | 2015-07-22 |
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Address after: 362800, Quanzhou Town, Quangang District, Fujian Province Patentee after: Fujian Baichuan Resources Recycling Technology Co., Ltd. Address before: 362808, Quanzhou Town, Quangang District, Fujian Province Patentee before: Fujian Baichuan Resources Recycling Technology Co., Ltd. |