CN112755656A - Filter cloth cleaning mechanism of filter press capable of being cleaned block by block through group pulling - Google Patents
Filter cloth cleaning mechanism of filter press capable of being cleaned block by block through group pulling Download PDFInfo
- Publication number
- CN112755656A CN112755656A CN202110068382.1A CN202110068382A CN112755656A CN 112755656 A CN112755656 A CN 112755656A CN 202110068382 A CN202110068382 A CN 202110068382A CN 112755656 A CN112755656 A CN 112755656A
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- Prior art keywords
- plate
- filter
- trolley
- cleaning
- pull
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
- B01D41/04—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of rigid self-supporting filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/172—Plate spreading means
Abstract
The invention discloses a filter cloth cleaning mechanism of a filter press, which can be used for cleaning filter cloth in a grouped and pulled-apart manner. The cleaning device comprises a plate pulling trolley, a filter plate positioning sensor and a cleaning device capable of cleaning filter plates one by one; the pulling plate trolley is arranged on a main beam of the filter press and can walk on the main beam; the cleaning device is arranged on the secondary beam which is parallel to the main beam and positioned below the outer side of the main beam, and can walk on the secondary beam; the filter plate is supported on the main beam through the ear shoulders; the pull plate trolley is provided with pull plate claws which can hook the lug shoulders on the filter plate and pull the filter plate to move along the length direction of the main beam; the cleaning device is provided with a locking device which can lock the pull plate trolley so that the cleaning device can move along with the pull plate trolley; the cleaning device is provided with a filter plate positioning laser sensor. According to the filter cloth cleaning structure, the cleaning trolley and the pull plate trolley are combined, the pull plate trolley is used for driving the cleaning trolley to move to the filter plate to be cleaned, and the sensor is used for positioning the filter plate to be cleaned, so that the economy is improved.
Description
Technical Field
The invention belongs to the technical field of filter pressing, and relates to a filter cloth cleaning mechanism of a filter press, which can be used for cleaning filter cloth by pulling the filter cloth in groups and cleaning the filter cloth by blocks.
Background
With the development of economy, the requirements of people on living environment are higher and higher. People pay more and more attention to environmental protection and treatment. Sewage treatment is an important component of environmental protection and treatment. The sewage treatment plays an important role in improving the water environment quality. With the increase of the sewage treatment amount, a large amount of sewage sludge is also generated. When the sludge is regulated in GB/T23485-2009 sludge for mixed landfill of sludge treatment of urban sewage treatment plants, the water content of the sludge in the basic index is required to be less than 60%.
In order to meet the requirement of sludge disposal, a filter press is generally used to filter and press sludge with a water content of 90% or more to a water content of 60% or less, and then mixed and buried or subjected to other subsequent treatments. The filter press is a mechanical device for performing solid-liquid separation, and as shown in fig. 1, the filter press device is composed of a frame 10, a filtering part 20 (filter plate, filter cloth), a pulling plate system 30, a hydraulic system 40, an electrical control system 50, and the like.
The filtering portion 20: mainly comprises a filter plate 2 and filter cloth. A filtering chamber is formed between two adjacent filtering plates. The (solid liquid) mixed liquor enters the filtering chamber through the feeding pipeline. Under the pressure of the mixed liquid, the liquid is discharged out of the filtering chamber through the filter cloth. The solid particles are intercepted by the filter cloth and are left in the filter chamber to gradually form a filter cake.
Due to long-time filtering work, the filter cloth fiber gaps can be blocked by fine particles in the filtrate. Thereby reducing the water permeability of the filter cloth. Affecting the normal operation of the filter press. Typically, the filter cloth is cleaned after a period of use in order to open the filter cloth fibre gaps and restore the filter cloth water permeability.
The current cleaning mechanism has three modes of pulling apart and cleaning block by block, pulling apart and cleaning group by group and cleaning group by block; the following drawbacks exist:
1. the block-by-block pulling and cleaning structure cannot be suitable for quickly pulling and unloading the filter plate, and the filter press has low working efficiency and long working period.
2. The washing water flow required by the grouping pulling-apart grouping washing structure is large. Therefore, the water supply pipeline, the water storage container, the water pump, the motor power and the like are all uneconomical due to large size.
3. The existing grouping pulling-apart block-by-block cleaning adopts a mode that a plurality of sensors are arranged on a cleaning trolley to sense an induction sheet arranged on each filter plate to position the filter plates. A plurality of sensors are required to be arranged on a cleaning trolley, and an induction sheet is required to be arranged on each filter plate. Not only increases the cost, but also increases the difficulty of assembly and debugging.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a filter cloth cleaning mechanism of a filter press, which can reduce the cost and the assembly and debugging difficulty and can clean filter cloth by groups, pulling open and cleaning block by block.
The purpose of the invention is realized by the following technical scheme:
the invention relates to a filter cloth cleaning mechanism of a filter press, which is used for cleaning filter cloth in a grouped and pulled-open and block-by-block manner, and comprises a pull plate trolley, a filter plate positioning sensor and a cleaning device, wherein the cleaning device can be used for cleaning filter plates in a block-by-block manner; the pulling plate trolley is arranged on a main beam of the filter press and can walk on the main beam; the cleaning device is arranged on the secondary beam which is parallel to the main beam and positioned below the outer side of the main beam, and can walk on the secondary beam; the filter plate of the filter press is supported on the main beam through the ear shoulder; the pull plate trolley is provided with pull plate claws which can lock lug shoulders on the filter plate and pull the filter plate to move along the length direction of the main beam; the cleaning device is provided with a locking device which can lock the pull plate trolley so that the cleaning device can move along with the pull plate trolley; a filter plate positioning sensor is arranged on the cleaning device; the filter plate positioning sensor is a laser sensor (namely an infrared sensor).
Further, the locking device comprises an electric push rod which is vertically arranged; a connecting plate is fixedly arranged on the pull plate trolley; the outer side of the connecting plate is provided with an adjusting plate in the horizontal direction connected with the connecting plate; the adjusting plate is provided with a push rod jack, and the electric push rod can be inserted into the push rod jack on the adjusting plate.
Furthermore, the locking device comprises a vertically arranged electric push rod and a suspension plate; the electric push rod comprises a square box body and a push rod with one end arranged in the square box body; the square box body of the electric push rod is fixedly connected with the suspension plate; the hanging plate is installed and fixed on the upright post of the door frame of the cleaning device at a position with the same height as the pull plate trolley.
Furthermore, a connecting plate which is slightly shorter than the length of the pull plate trolley is fixedly arranged on the pull plate trolley in the horizontal direction; two support arms perpendicular to the connecting plate are arranged at two ends of the connecting plate, and the two support arms are fixedly arranged at two ends of the pulling plate trolley through bolts.
Furthermore, two transverse waist-shaped holes (elliptical holes) are formed in the connecting plate, and the adjusting plate is connected with the connecting plate by inserting bolts into the two transverse waist-shaped holes (capable of moving left and right to adjust positions); the adjusting plate is also provided with a waist-shaped hole (namely a push rod jack) which is vertical to the direction of the connecting plate, and a push rod of the electric push rod can be inserted into the waist-shaped hole.
Furthermore, an electric push rod in-place sensor and a pull plate trolley in-place sensor are arranged on the suspension plate and are positioned obliquely below the electric push rod from top to bottom. When the adjusting plate and the connecting plate of the pull plate trolley move to the side of the locking device of the cleaning device, the pull plate trolley in-place sensor can sense and send out an in-place signal.
Furthermore, the square box body of the electric push rod is fixedly connected with the suspension plate through a screw.
Further, the suspension plate is installed and fixed on the upright post of the door frame of the cleaning device at a position which is equivalent to the height of the pulling plate trolley by inserting bolts into the two vertical waist-shaped holes (the positions can be adjusted by moving up and down).
Furthermore, the pulling plate trolley is connected with the pulling plate driving motor through a set of driving wheel and a set of driving chain, and can move along the length direction of the main beam under the driving of the pulling plate driving motor and the driving chain.
Furthermore, the cleaning device is connected with the cleaning driving motor through another set of driving wheel and driving chain, and can move along the length direction of the secondary beam under the driving of the cleaning driving motor and the driving chain.
The invention has the beneficial effects that:
the invention provides a novel filter cloth cleaning structure for cleaning filter cloth by groups and pulling the filter cloth to be cleaned one by one, which combines a cleaning trolley and a pulling plate trolley, utilizes the pulling plate trolley to drive the cleaning trolley to move to a filter plate to be cleaned, and utilizes a sensor to position the filter plate to be cleaned, thereby improving the economy, reducing the cost and reducing the assembly and debugging difficulty.
Compared with the prior art, the filter cloth cleaning mechanism of the filter press capable of being cleaned by groups and blocks by pulling open has the following advantages:
1. a set of walking system is adopted for the walking drive of the cleaning trolley and the plate pulling trolley; the economy is improved.
2. The number of filter plate positioning sensors on the cleaning trolley is reduced;
3. and an induction sheet is not required to be additionally arranged on each filter plate. The economy is improved.
4. A large cleaning frame and a walking system are not needed; the cost performance is improved.
Drawings
FIG. 1 is a schematic front view of a filter press;
figure 2 is a schematic side view of the filter press (left side view of figure 1);
FIG. 3 is a schematic front view of a filter cloth cleaning mechanism of a filter press according to the present invention, which is configured to be cleaned by pulling up the filter cloth in groups and cleaning the filter cloth in blocks (enlarged views of the parts 2, 4 and 6 in FIG. 1);
FIG. 4 is a schematic side view (side view in the direction of A in FIG. 3) of the filter press cloth cleaning mechanism of the present invention, which is capable of performing cleaning by pulling the filter cloth in groups and cleaning by blocks;
FIG. 5 is a front view of the locking device 8 of the present invention;
FIG. 6 is a side view of the locking device 8 of the present invention;
FIG. 7 is a schematic top view of the locking device 8 of the present invention;
FIG. 8 is a schematic top view of the lock device 8 of the present invention taken in cross section (top view taken from the middle of FIG. 5);
fig. 9 is a schematic top view of the drawplate cart 3 according to the present invention;
FIG. 10 is a schematic top view of the drawplate cart 3 of the present invention in place and locked with the locking device 8;
fig. 11 is a schematic view (side view B in fig. 4) showing the structure of the pulling plate claws 38 of the pulling plate cart 3 of the present invention that abut against (lock) the shoulders 21 of the filter plates 2.
In the figure: 10. the device comprises a frame 20, a filtering part 30, a pulling plate system 40, a hydraulic system 50, an electric control system 1, a main beam 2, a filter plate 3, a pulling plate trolley 4, a pressure plate 5, an oil cylinder 6, a cleaning device 7, a filter plate positioning sensor 8, a locking device 9, an electric push rod 91, a square box body 92, a push rod 11, a suspension plate 12, a secondary beam 13, a vertical kidney-shaped hole 15, a pulling plate trolley in-place sensor 16, an electric push rod in-place sensor 21, an ear shoulder 31, a connecting plate 32, a support arm 33, a transverse kidney-shaped hole 34, a bolt 35, an adjusting plate 36, a bolt 37, a kidney-shaped hole (push rod jack) 38, a pulling
Detailed Description
The invention is further described below with reference to the following figures and examples.
Example 1
As shown in fig. 1-4, the filter cloth cleaning mechanism of the filter press of the invention, which is used for cleaning filter cloth by pulling apart and cleaning block by block in groups, comprises a pull plate trolley 3, a cleaning device 6, a filter plate positioning sensor 7 and the like; the pulling plate trolley 3 is arranged on a main beam 1 of the filter press and can walk on the main beam 1; the pulling plate trolley 3 is connected with a pulling plate driving motor through a set of driving wheels and a set of driving chain and can move along the length direction of the main beam 1 under the driving of the pulling plate driving motor and the driving chain; the cleaning device 6 is arranged on a secondary beam 12 which is parallel to the main beam 1 and is positioned below the outer side of the main beam 1, and can walk on the secondary beam 12; the cleaning device 6 is connected with a cleaning driving motor through another set of driving wheel and driving chain, and can move along the length direction of the secondary beam 12 under the driving of the cleaning driving motor and the driving chain; the filter plate 2 of the filter press is supported on the main beam 1 through the ear shoulder 21; the cleaning device 6 is provided with a locking device 8 capable of locking the pulling plate trolley 3, so that the cleaning device 6 can move along the length direction of the main beam 1 along with the pulling plate trolley 3; a filter plate positioning sensor 7 is arranged on the cleaning device 6, and the filter plate positioning sensor 7 is a laser sensor (infrared sensor); the cleaning device 6 can clean the filter plates 2 piece by piece.
As shown in fig. 11, the top of the pulling plate trolley 3 is provided with two pulling plate claws 38 capable of protruding upwards, which can be used for propping against (locking) the ear shoulders 21 on the filter plates 2 (the ear shoulders 21 are located between the two pulling plate claws 38), thereby being capable of pulling the filter plates 2 to move along the length direction of the main beam 1;
as shown in fig. 5-10, the locking device 8 capable of locking the pulling plate trolley 3 on the cleaning device 6 comprises a vertically arranged electric push rod 9 and a suspension plate 11; the electric push rod 9 comprises a square box body 91 and a push rod 92 with one end arranged in the square box body 91; the square box 91 of the electric push rod 9 is fixedly connected with the suspension plate 11 through a screw; two vertical waist-shaped holes 13 (oval-shaped holes) are formed in the suspension plate 11, and the suspension plate 11 is installed and fixed on the upright post of the gantry of the cleaning device 6 at a position which is as high as the pull plate trolley 3 through inserting bolts into the two vertical waist-shaped holes 13 (the positions can be adjusted by moving up and down).
A connecting plate 31 which is slightly shorter than the length of the pull plate trolley 3 is fixedly arranged on the pull plate trolley 3 in the horizontal direction; two support arms 32 perpendicular to the connecting plate 31 are arranged at two ends of the connecting plate 31, and the two support arms 32 are fixedly arranged at two ends of the pull plate trolley 3 through bolts 34; two transverse waist-shaped holes 33 (elliptical holes) are formed in the connecting plate 31, and the adjusting plate 35 is connected with the connecting plate 31 by inserting bolts 36 into the two transverse waist-shaped holes 33 (the adjusting position can be adjusted leftwards and rightwards); the adjustment plate 35 and the connection plate 31 are both horizontally disposed. The adjusting plate 35 is also provided with a waist-shaped hole 37 (push rod insertion hole) perpendicular to the direction of the connecting plate 31, into which the push rod 92 of the electric push rod 9 can be inserted.
An electric push rod in-place sensor 16 and a pull plate trolley in-place sensor 15 are arranged on the suspension plate 11 and are positioned obliquely below the electric push rod 9 from top to bottom. When the adjusting plate 35 and the connecting plate 31 of the pull plate trolley 3 move to the side of the locking device 8 of the cleaning device 6, the pull plate trolley in-position sensor 15 can sense and send out an in-position signal.
The working principle of the filter cloth cleaning mechanism of the filter press for cleaning by groups and blocks is as follows:
1) when the filter plate 2 needs to be cleaned after the filtering process is finished, the pressure plate 4 is driven by the oil cylinder 5 to return to the initial position;
2) the plate pulling trolley 3 moves to the position of the cleaning device 6, the cleaning device 6 is locked on the plate pulling trolley 3 through the locking device 8 on the cleaning device 6 (after the plate pulling trolley 3 is in place, the plate pulling trolley in-place sensor 15 senses the adjusting plate 35, a feedback signal is given to the cleaning control system, the cleaning control system controls the electric push rod 9 to start to descend, after the electric push rod 9 descends in place, the electric push rod in-place sensor 16 senses, a feedback signal is given to the cleaning control system, and the cleaning control system controls the plate pulling trolley 3 to start to move towards the position direction of the filter plate 2, namely the plate pulling trolley moving direction A in figure 9); the cleaning device 6 moves along the length direction of the main beam 1 along with the pulling plate trolley 3.
3) The pulling plate trolley 3 moves to the position of the filter plate 2 to be pulled open. The pulling plate trolley 3 locks the lug shoulders 21 on the filter plates 2 through the pulling plate claws 37; the pulling plate trolley 3 moves reversely to pull the whole group of filter plates to the position to be cleaned.
4) The cleaning device 6 positions the single filter plate according to the filter plate positioning sensor 7, and the cleaning device 6 cleans the filter plate 2; after the filter plates 2 are cleaned, the cleaning device 6 moves to the next filter plate for cleaning;
5) after the group of filter plates 2 are cleaned, the pulling plate trolley 3 pulls the next group of filter plates 2 open and cleans the filter plates. Until the cleaning of all filter plates 2 is completed.
6) After all the filter plates 2 are cleaned, the pulling plate trolley 3 returns the cleaning device 6 to the initial position of the cleaning device. The pulling plate trolley 3 is disconnected from the cleaning device 6. And the whole machine restores the working state.
The filter plate positioning sensor 7 adopts a photoelectric sensor originally, and a baffle plate is required to be arranged on each filter plate 2; at present, a laser sensor (infrared sensor) is adopted, and a baffle plate does not need to be arranged on each filter plate 2.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present invention as described in the specification and the attached drawings, or directly or indirectly used in other related arts, are included in the scope of the present invention.
Claims (10)
1. A filter cloth cleaning mechanism of a filter press capable of cleaning filter cloth in a grouped and pulled-open and block-by-block manner is characterized by comprising a pull plate trolley, a filter plate positioning sensor and a cleaning device capable of cleaning the filter plate in a block-by-block manner; the pulling plate trolley is arranged on a main beam of the filter press and can walk on the main beam; the cleaning device is arranged on the secondary beam which is parallel to the main beam and positioned below the outer side of the main beam, and can walk on the secondary beam; the filter plate of the filter press is supported on the main beam through the ear shoulder; the pull plate trolley is provided with pull plate claws which can lock lug shoulders on the filter plate and pull the filter plate to move along the length direction of the main beam; the cleaning device is provided with a locking device which can lock the pull plate trolley so that the cleaning device can move along with the pull plate trolley; a filter plate positioning sensor is arranged on the cleaning device; the filter plate positioning sensor is a laser sensor, namely an infrared sensor.
2. A filter press cloth cleaning mechanism according to claim 1, wherein the locking means comprises a vertically arranged electric push rod; a connecting plate is fixedly arranged on the pull plate trolley; the outer side of the connecting plate is provided with an adjusting plate in the horizontal direction connected with the connecting plate; the adjusting plate is provided with a push rod jack, and the electric push rod can be inserted into the push rod jack on the adjusting plate.
3. A filter press cloth cleaning mechanism according to claim 2, wherein the locking means comprises a vertically arranged electric push rod and a suspension plate; the electric push rod comprises a square box body and a push rod with one end arranged in the square box body; the square box body of the electric push rod is fixedly connected with the suspension plate; the hanging plate is installed and fixed on the upright post of the door frame of the cleaning device at a position with the same height as the pull plate trolley.
4. A filter press cloth cleaning mechanism according to claim 3, wherein a connecting plate slightly shorter than the length of the pull-plate trolley is fixedly arranged on the pull-plate trolley in the horizontal direction; two support arms perpendicular to the connecting plate are arranged at two ends of the connecting plate, and the two support arms are fixedly arranged at two ends of the pulling plate trolley through bolts.
5. The filter cloth cleaning mechanism for filter presses of group-by-group pulling-open block-by-block cleaning as claimed in claim 4, wherein the connecting plate is provided with two transverse slotted holes, and the adjusting plate is connected with the connecting plate by inserting bolts into the two transverse slotted holes; the adjusting plate is also provided with a waist-shaped hole which is a push rod jack and is vertical to the direction of the connecting plate, and a push rod of the electric push rod can be inserted into the waist-shaped hole.
6. The mechanism for cleaning filter cloth of filter presses by pulling apart and cleaning by blocks in groups as claimed in claim 3, 4 or 5, wherein the suspension plate is provided with an electric push rod in-place sensor and a pull plate trolley in-place sensor from top to bottom at the obliquely lower part of the electric push rod.
7. The filter press cloth cleaning mechanism according to claim 6, wherein the square box of the electric push rod is fixedly connected with the suspension plate by a screw.
8. The filter press cloth cleaning mechanism according to claim 7, wherein the suspension plate is fixed on the upright of the gantry of the cleaning device at a position corresponding to the height of the pull plate trolley by inserting bolts into two vertical kidney-shaped holes.
9. The filter press cloth cleaning mechanism according to claim 8, wherein the pull-plate trolley is connected to the pull-plate driving motor through a set of driving wheels and driving chains, and can move along the length direction of the main beam under the driving of the pull-plate driving motor and the driving chains.
10. A filter press cloth cleaning mechanism according to claim 9, wherein the cleaning device is connected to the cleaning driving motor through another set of driving wheels and driving chains, and can move along the length direction of the secondary beam under the driving of the cleaning driving motor and the driving chains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110068382.1A CN112755656A (en) | 2021-01-19 | 2021-01-19 | Filter cloth cleaning mechanism of filter press capable of being cleaned block by block through group pulling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110068382.1A CN112755656A (en) | 2021-01-19 | 2021-01-19 | Filter cloth cleaning mechanism of filter press capable of being cleaned block by block through group pulling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112755656A true CN112755656A (en) | 2021-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110068382.1A Pending CN112755656A (en) | 2021-01-19 | 2021-01-19 | Filter cloth cleaning mechanism of filter press capable of being cleaned block by block through group pulling |
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| CN (1) | CN112755656A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202028250U (en) * | 2011-01-28 | 2011-11-09 | 杭州金龙压滤机有限公司 | Cleaning device for pressure filter |
| CN104998448A (en) * | 2015-07-27 | 2015-10-28 | 无锡市金大压滤机有限公司 | High-efficiency filter press |
| CN205145703U (en) * | 2015-11-13 | 2016-04-13 | 江苏广和科发机电制造有限公司 | Press filter |
| KR20190139367A (en) * | 2018-06-08 | 2019-12-18 | 경규혁 | A filter press system equipped with an automatic filter cloth washing device |
| CN111135618A (en) * | 2020-03-20 | 2020-05-12 | 景津环保股份有限公司 | Filter plate grouping pulling open and filter cloth block by block cleaning tuning device and corresponding high-efficiency filter press |
| CN210583854U (en) * | 2019-06-21 | 2020-05-22 | 景津环保股份有限公司 | Adjustable stroke limiting device and corresponding filter cloth cleaning mechanism |
-
2021
- 2021-01-19 CN CN202110068382.1A patent/CN112755656A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202028250U (en) * | 2011-01-28 | 2011-11-09 | 杭州金龙压滤机有限公司 | Cleaning device for pressure filter |
| CN104998448A (en) * | 2015-07-27 | 2015-10-28 | 无锡市金大压滤机有限公司 | High-efficiency filter press |
| CN205145703U (en) * | 2015-11-13 | 2016-04-13 | 江苏广和科发机电制造有限公司 | Press filter |
| KR20190139367A (en) * | 2018-06-08 | 2019-12-18 | 경규혁 | A filter press system equipped with an automatic filter cloth washing device |
| CN210583854U (en) * | 2019-06-21 | 2020-05-22 | 景津环保股份有限公司 | Adjustable stroke limiting device and corresponding filter cloth cleaning mechanism |
| CN111135618A (en) * | 2020-03-20 | 2020-05-12 | 景津环保股份有限公司 | Filter plate grouping pulling open and filter cloth block by block cleaning tuning device and corresponding high-efficiency filter press |
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