CN109621514B - Candle type filter element with switch and filtering method thereof - Google Patents
Candle type filter element with switch and filtering method thereof Download PDFInfo
- Publication number
- CN109621514B CN109621514B CN201910015286.3A CN201910015286A CN109621514B CN 109621514 B CN109621514 B CN 109621514B CN 201910015286 A CN201910015286 A CN 201910015286A CN 109621514 B CN109621514 B CN 109621514B
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- Prior art keywords
- filter
- plate
- pipe
- end cover
- tube
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- 238000001914 filtration Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims description 6
- 239000007788 liquid Substances 0.000 claims abstract description 61
- 238000007664 blowing Methods 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims description 27
- 239000012065 filter cake Substances 0.000 claims description 12
- 210000004907 gland Anatomy 0.000 claims description 9
- 230000000630 rising effect Effects 0.000 claims description 8
- 239000000706 filtrate Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
- B01D29/82—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
-
- 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
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
- B01D29/84—Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention provides a candle filter element with a switch, which comprises a filter element framework, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are arranged at the upper end and the lower end of the filter element framework; the liquid lifting pipe and the central pipe are concentrically arranged, a gap is formed between the inner wall of the liquid lifting pipe and the outer wall of the central pipe, a spring switch assembly is arranged in the upper end cover, the top end of the central pipe penetrates out of the upper end cover and extends upwards, the spring switch assembly is sleeved on the central pipe, and the spring switch assembly is switched between opening and closing to match the filtration and blowback of the filter element. The beneficial effects of the invention are as follows: the beneficial effects of the invention are as follows: the sectional filter element framework is adopted, and the spring switch assembly is combined, so that the purpose of positive blowing can be achieved under low pressure, the filtration is thorough, and the filtration efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of microporous filtration, and particularly relates to a candle filter element with a switch and a filtration method thereof.
Background
Microporous Filtration (MF) is one of the earliest membrane separation techniques developed and widely used. The filter element is a necessary component in the filtering equipment, the filter element generally comprises a framework and filter cloth arranged outside the framework, one end of the filter element is connected with the liquid collecting pipe, and filtered liquid is collected from the liquid collecting pipe after passing through the filter element. And then blowing off filter residues on the filter cloth through back blowing. In general large-scale filter, the filter core is longer, and the filtration often takes place to be thoroughly, and in the filtration process, the filter core submerges in the filtrate, after filtering a part, the filtration of the first half of filter core is accomplished, but the second half still can't filter thoroughly, causes the waste of material, and filtration efficiency is low.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a candle filter element with a switch and a filtering method thereof.
The aim of the invention is achieved by the following technical scheme:
the candle filter element with the switch comprises a filter element framework, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are arranged at the upper end and the lower end of the filter element framework; the liquid lifting pipe and the central pipe are concentrically arranged, a gap is formed between the inner wall of the liquid lifting pipe and the outer wall of the central pipe, a spring switch assembly is arranged in the upper end cover, the top end of the central pipe penetrates out of the upper end cover and extends upwards, the spring switch assembly is sleeved on the central pipe, and the spring switch assembly is switched between opening and closing to be matched with the filtration and blowback of the filter element.
Preferably, the spring switch assembly comprises a fixed plate arranged in the upper end cover and a blowback plate arranged at the port part of the upper end cover, a spring and a baffle are arranged between the fixed plate and the blowback plate, the baffle is arranged above the spring, a second spring is further arranged above the blowback plate, a pressing sheet is arranged at the top of the second spring, and the second spring and the pressing sheet are respectively arranged outside the upper end cover.
Preferably, through holes are uniformly distributed on the fixed plate, and blowback holes are formed in the blowback plate.
Preferably, the outer diameter of the baffle plate is larger than the outer diameter of the spring, the baffle plate and the maximum outer diameter formed by the blowback holes on the blowback plate are equivalent to be used for covering the blowback holes, a gap is formed between the peripheral wall of the baffle plate and the inner wall of the upper end cover, and the outer diameter of the pressing plate is larger than the outer diameter of the second spring.
Preferably, the pipe diameter of the central pipe is 5-20mm.
Preferably, the lift tube is a hollow tube, the surface of the filter hole tube is uniformly provided with filter holes, and the cross section formed by surrounding the filter hole tubes is petal-shaped.
Preferably, a segmented plate is sleeved and fixed outside the central tube, the segmented plate divides the central tube into an upper segment and a lower segment, the liquid lifting tube comprises a liquid lifting tube and a lower liquid lifting tube, the liquid lifting tube is arranged above the segmented plate, the lower liquid lifting tube is arranged below the segmented plate, a gap is formed between the bottom of the liquid lifting tube and the segmented plate, the top end of the lower liquid lifting tube is tightly connected with the segmented plate, and the filter hole tube comprises an upper filter hole tube and a lower filter hole tube arranged below the segmented plate.
Preferably, the top end of the lift tube is abutted against the bottom of the fixing plate, and the hollow part of the lift tube is coaxial with the through hole in the fixing plate.
Preferably, the filter element framework is also provided with filter cloth, two ends of the filter cloth are sleeved on the upper end cover and the lower end cover, and the upper end cover and the lower end cover are also provided with an upper gland and a lower gland for compressing the filter cloth.
Preferably, the filtering method of any one of the candle filter elements with the switch comprises the following steps:
s1, enabling liquid to be filtered to enter from the outside of a filter element, and filtering through a filter cloth and a filter framework; at this time, the filter cloth clings to the filter element framework;
the filter liquid of the upper filter hole pipe flows from a gap between the inner wall of the rising liquid pipe and the outer wall of the central pipe to the upper end of the filter element, passes through the through hole on the fixed plate, pushes the baffle plate and the back blowing plate upwards, and finally flows out from the opening of the upper gland and enters the liquid collecting pipe connected with the filter element for collection; the filtered liquid in the lower filtering hole pipe finally enters the liquid collecting pipe through the central pipe for collection;
s2, after filtering for a period of time, no filtrate exists on the upper part of the filter element, the air pressure is reduced, no filtered liquid flows out of the liquid lifting tube, the back blowing plate falls to cover the upper gland, and at the moment, the filtered liquid only flows out of the central tube;
s3, positive blowing and drying, wherein gas enters from the filtering equipment, press-drying is carried out on a filter cake on the surface of the filter cloth, after a certain time, the filter cake of the upper filter pore tube is firstly wet and dried, so that the filter cake is cracked, a large amount of gas is discharged from the rising liquid tube through the spring, so that the air pressure in the equipment is reduced, the baffle plate is lowered, the spring is compressed, and the baffle plate shields the through holes on the fixing plate; forcing the gas to press the filter cake at the lower filter pore tube to dry;
s4, back blowing, wherein gas enters from the back blowing holes of the central pipe and the back blowing plate, and the gas entering from the back blowing holes enters into the through holes on the fixed plate through the gap between the baffle plate and the upper end cover and enters into the lift tube;
the gas passing through the rising liquid pipe finally blows the filter cloth outside the upper filter hole pipe, and the gas passing through the central pipe finally blows the filter cloth outside the lower filter hole pipe, so that the filter residue falls off.
The beneficial effects of the invention are as follows: the sectional filter element framework is adopted, and the spring switch assembly is combined, so that the purpose of back blowing can be achieved under low pressure, the filtration is thorough, and the filtration efficiency is greatly improved.
Drawings
Fig. 1: the invention relates to an explosion diagram of a filter element structure.
Fig. 2: an exploded view of the spring switch assembly of the present invention.
Fig. 3: the filter element of the invention has a schematic structure, and does not contain filter cloth.
Fig. 4: the filtering state of the filter element is schematically shown.
Fig. 5: the invention relates to a filter element blowback state schematic diagram.
Fig. 6: the structure of the filter element is schematically shown in a low-pressure state after back blowing.
Detailed Description
The invention discloses a candle filter element with a switch, which is shown in fig. 1-4 and comprises a filter element framework, an upper end cover 1 and a lower end cover 2 arranged at the upper end and the lower end of the filter element framework, wherein filter cloth 52 is arranged outside the filter element framework, two ends of the filter cloth are sleeved on the upper end cover and the lower end cover, an upper pressing cover 11 and a lower pressing cover 21 for pressing the filter cloth are also arranged on the upper end cover and the lower end cover, and a pressing nut 22 connected with the lower end cover 2 is also arranged below the lower pressing cover, similar to the prior art.
The filter element framework comprises a central tube 3 arranged at the center of the filter element, a liquid lifting tube sleeved outside the central tube 3 and a filter hole tube arranged outside the liquid lifting tube, wherein the liquid lifting tube and the central tube 3 are concentrically arranged, a gap is formed between the inner wall of the liquid lifting tube and the outer wall of the central tube 3, a spring switch assembly is arranged in the upper end cover 1, the top end of the central tube 3 penetrates out of the upper end cover 1 and extends upwards, the spring switch assembly is sleeved on the central tube 3, and the spring switch assembly is switched between opening and closing to match the filtration and blowback of the filter element. In this embodiment, the pipe diameter of the central pipe 3 is 5-20mm.
Specifically, the spring switch assembly comprises a fixed plate 4 arranged in the upper end cover 1 and a blowback plate 5 arranged at the port of the upper end cover, a spring 6 and a baffle 7 are arranged between the fixed plate 4 and the blowback plate 5, the baffle 7 is arranged above the spring 6, a second spring 8 is further arranged above the blowback plate 5, a pressing sheet 9 is arranged at the top of the second spring 8, and the second spring 8 and the pressing sheet 9 are respectively arranged outside the upper end cover 1.
Through holes 41 are uniformly distributed in the fixed plate 4, and blowback holes 51 are formed in the blowback plate 5. The outer diameter of the baffle 7 is larger than the outer diameter of the spring 6 and is equal to the maximum outer diameter of the blowback hole 51 formed in the blowback plate 5, so as to cover the blowback hole. In this embodiment, three blowback holes 51 are shown, and there is no limitation of a fixing structure for the baffle 7, so that the size that the blowback holes on the blowback plate 5 can be covered can be satisfied. The peripheral wall of the baffle 7 and the inner wall of the upper end cover 1 are provided with gaps, and the outer diameter of the pressing piece 9 is larger than that of the second spring 8. The liquid lifting pipe is a hollow pipe, filtering holes are uniformly distributed on the surface of the filtering hole pipe, and the cross section formed by surrounding the filtering hole pipes is petal-shaped.
Further, a segment plate 61 is fixedly sleeved outside the central tube 3, the segment plate 61 divides the central tube into an upper segment and a lower segment, and the segment plate 61 is arranged in the quincuncial sleeve 13 with a petal-shaped section. The lift tube includes a lift tube 31 and a lower lift tube 32. The lift pipe 31 is disposed above the segmented plate 61, and the lower lift pipe 32 is disposed below the segmented plate 61. A gap is provided between the bottom of the lift pipe 31 and the segmented plate 61, the top end of the lower lift pipe 32 is tightly connected with the segmented plate 61, and the filter hole pipe comprises an upper filter hole pipe 42 and a lower filter hole pipe 43 arranged below the segmented plate 61. The top end of the lift tube 31 is abutted against the bottom of the fixing plate 4, and the hollow part of the lift tube 31 is coaxial with the through hole 41 on the fixing plate 4. In this embodiment, 6 through holes 41 are provided, and correspondingly, 6 upper filtering hole pipes and 6 lower filtering hole pipes are provided.
The invention also discloses a filtering method of any candle filter element with a switch, which comprises the following steps:
s1, enabling liquid to be filtered to enter from the outside of the filter element, and filtering through a filter cloth 52 and a filter framework; at this time, the filter cloth 52 is tightly attached to the filter element skeleton;
the filtered liquid of the upper filtering hole pipe 42 flows from the gap between the inner wall of the rising liquid pipe 31 and the outer wall of the central pipe 3 to the upper end of the filter element, passes through the through hole 41 on the fixed plate 4, pushes the baffle 7 and the back-blowing plate 5 upwards, and finally flows out from the opening of the upper pressing cover 11 to enter the liquid collecting pipe connected with the filter element for collection; the filtered liquid in the lower filtering hole pipe 43 finally enters the liquid collecting pipe for collection through the central pipe 3;
s2, after filtering for a period of time, no filtrate exists on the upper part of the filter element, the air pressure is reduced, no filtrate flows out of the liquid lifting tube, the back-blowing plate 5 falls to cover the upper gland, and at the moment, the filtrate only flows out of the central tube;
s3, positive blowing and drying, wherein gas enters from the filter equipment and presses and dries a filter cake on the surface of the filter cloth 52, after a certain time, the filter cake of the upper filter hole pipe 42 is firstly wet and dried to cause filter cake cracking, a large amount of gas is discharged from the riser pipe 31 through a spring to cause the pressure in the equipment to drop, the baffle plate 7 descends, the spring 6 is compressed, and the baffle plate 7 shields the through holes on the fixed plate; forcing the gas to press the filter cake dry at the lower filter orifice tube 43;
s3, back blowing, wherein gas enters from the central pipe 3 and the back blowing holes 51 of the back blowing plate 5, and the gas entering from the back blowing holes enters into the through holes on the fixed plate through the gap between the baffle plate and the upper end cover and enters into the lift tube;
the gas passing through the rising liquid pipe finally blows the filter cloth outside the upper filter hole pipe, and the gas passing through the central pipe finally blows the filter cloth outside the lower filter hole pipe, so that the filter residue falls off.
There are, of course, many specific embodiments of the invention, not set forth herein. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the invention claimed.
Claims (3)
1. The candle filter element with the switch is characterized by comprising a filter element framework, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are arranged at the upper end and the lower end of the filter element framework; the liquid lifting pipe and the central pipe are concentrically arranged, a gap is formed between the inner wall of the liquid lifting pipe and the outer wall of the central pipe, a spring switch assembly is arranged in the upper end cover, the top end of the central pipe penetrates out of the upper end cover and extends upwards, the spring switch assembly is sleeved on the central pipe, and the spring switch assembly is switched between opening and closing to be matched with the filtration and blowback of the filter element;
the spring switch assembly comprises a fixed plate arranged in the upper end cover and a back blowing plate arranged at the port part of the upper end cover, a spring and a baffle are arranged between the fixed plate and the back blowing plate, the baffle is arranged above the spring, a second spring is further arranged above the back blowing plate, a pressing sheet is arranged at the top of the second spring, and the second spring and the pressing sheet are respectively arranged outside the upper end cover;
through holes are uniformly distributed on the fixed plate, and blowback holes are formed in the blowback plate;
the outer diameter of the baffle plate is larger than the outer diameter of the spring, the baffle plate is equivalent to the maximum outer diameter formed by the back blowing holes on the back blowing plate and used for covering the back blowing holes, a gap is formed between the peripheral wall of the baffle plate and the inner wall of the upper end cover, and the outer diameter of the pressing plate is larger than the outer diameter of the second spring; the liquid lifting pipe is a hollow pipe, the surfaces of the filtering hole pipes are uniformly provided with filtering holes, and the cross section formed by surrounding the filtering hole pipes is petal-shaped;
the central tube is sleeved and fixed with a segmented plate, the segmented plate divides the central tube into an upper segment and a lower segment, the liquid lifting tube comprises a liquid lifting tube and a lower liquid lifting tube, the liquid lifting tube is arranged above the segmented plate, the lower liquid lifting tube is arranged below the segmented plate, a gap is formed between the bottom of the liquid lifting tube and the segmented plate, the top end of the lower liquid lifting tube is tightly connected with the segmented plate, and the filter hole tube comprises an upper filter hole tube and a lower filter hole tube arranged below the segmented plate;
the top end of the lifting liquid pipe is abutted to the bottom of the fixed plate, and the hollow part of the lifting liquid pipe is coaxial with the through hole in the fixed plate;
the filter element framework is also provided with filter cloth, two ends of the filter cloth are sleeved on the upper end cover and the lower end cover, and the upper end cover and the lower end cover are also provided with an upper gland and a lower gland for compressing the filter cloth.
2. A candle filter element with a switch as in claim 1, wherein the tube diameter of the center tube is 5-20mm.
3. A method of filtering a candle cartridge with a switch according to any of claims 1-2, comprising the steps of:
s1, enabling liquid to be filtered to enter from the outside of a filter element, and filtering through a filter cloth and a filter framework; at this time, the filter cloth clings to the filter element framework;
the filter liquid of the upper filter hole pipe flows from a gap between the inner wall of the rising liquid pipe and the outer wall of the central pipe to the upper end of the filter element, passes through the through hole on the fixed plate, pushes the baffle plate and the back blowing plate upwards, and finally flows out from the opening of the upper gland and enters the liquid collecting pipe connected with the filter element for collection; the filtered liquid in the lower filtering hole pipe finally enters the liquid collecting pipe through the central pipe for collection;
s2, after filtering for a period of time, no filtrate exists on the upper part of the filter element, the air pressure is reduced, no filtered liquid flows out of the liquid lifting tube, the back blowing plate falls to cover the upper gland, and at the moment, the filtered liquid only flows out of the central tube;
s3, positive blowing and drying, wherein gas enters from the filtering equipment, press-drying is carried out on a filter cake on the surface of the filter cloth, after a certain time, the filter cake of the upper filter pore tube is firstly wet and dried, so that the filter cake is cracked, a large amount of gas is discharged from the rising liquid tube through the spring, so that the air pressure in the equipment is reduced, the baffle plate is lowered, the spring is compressed, and the baffle plate shields the through holes on the fixing plate; forcing the gas to press the filter cake at the lower filter pore tube to dry;
s4, back blowing, wherein gas enters from the back blowing holes of the central pipe and the back blowing plate, and the gas entering from the back blowing holes enters into the through holes on the fixed plate through the gap between the baffle plate and the upper end cover and enters into the lift tube;
the gas passing through the rising liquid pipe finally blows the filter cloth outside the upper filter hole pipe, and the gas passing through the central pipe finally blows the filter cloth outside the lower filter hole pipe, so that the filter residue falls off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015286.3A CN109621514B (en) | 2019-01-08 | 2019-01-08 | Candle type filter element with switch and filtering method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015286.3A CN109621514B (en) | 2019-01-08 | 2019-01-08 | Candle type filter element with switch and filtering method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109621514A CN109621514A (en) | 2019-04-16 |
| CN109621514B true CN109621514B (en) | 2023-10-03 |
Family
ID=66060041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910015286.3A Active CN109621514B (en) | 2019-01-08 | 2019-01-08 | Candle type filter element with switch and filtering method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109621514B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0182000A2 (en) * | 1984-06-18 | 1986-05-28 | Titus, Hans-Joachim, Dipl.-Ing. | Cyclone filter with all metal tandem filter candle |
| CN101979123A (en) * | 2010-10-09 | 2011-02-23 | 深圳市森科妍科技有限公司 | Control system for high-precision liquid filter |
| CN102166443A (en) * | 2011-03-21 | 2011-08-31 | 福建省泉州市江南冷却器厂 | Successively-discharging candle filter |
| CN202715295U (en) * | 2012-06-12 | 2013-02-06 | 蔡圣佳 | Automatic residue unloading filter |
| CN203971521U (en) * | 2014-07-07 | 2014-12-03 | 邢兆杰 | The de-cake formula filter of blowback flow-disturbing brush slag |
| CN104696531A (en) * | 2015-03-16 | 2015-06-10 | 大连碧蓝节能环保科技有限公司 | Delay opening and closing valve for cleaning candle filter elements |
| CN108379904A (en) * | 2018-03-02 | 2018-08-10 | 威孔过滤科技（苏州）有限公司 | Candle type filter element with airflow control mechanism |
-
2019
- 2019-01-08 CN CN201910015286.3A patent/CN109621514B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0182000A2 (en) * | 1984-06-18 | 1986-05-28 | Titus, Hans-Joachim, Dipl.-Ing. | Cyclone filter with all metal tandem filter candle |
| CN101979123A (en) * | 2010-10-09 | 2011-02-23 | 深圳市森科妍科技有限公司 | Control system for high-precision liquid filter |
| CN102166443A (en) * | 2011-03-21 | 2011-08-31 | 福建省泉州市江南冷却器厂 | Successively-discharging candle filter |
| CN202715295U (en) * | 2012-06-12 | 2013-02-06 | 蔡圣佳 | Automatic residue unloading filter |
| CN203971521U (en) * | 2014-07-07 | 2014-12-03 | 邢兆杰 | The de-cake formula filter of blowback flow-disturbing brush slag |
| CN104696531A (en) * | 2015-03-16 | 2015-06-10 | 大连碧蓝节能环保科技有限公司 | Delay opening and closing valve for cleaning candle filter elements |
| CN108379904A (en) * | 2018-03-02 | 2018-08-10 | 威孔过滤科技（苏州）有限公司 | Candle type filter element with airflow control mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109621514A (en) | 2019-04-16 |
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