CN115364538A - Membrane filter press filter unit based on dehydration is reinforceed to electroosmosis - Google Patents
Membrane filter press filter unit based on dehydration is reinforceed to electroosmosis Download PDFInfo
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- CN115364538A CN115364538A CN202211116350.5A CN202211116350A CN115364538A CN 115364538 A CN115364538 A CN 115364538A CN 202211116350 A CN202211116350 A CN 202211116350A CN 115364538 A CN115364538 A CN 115364538A
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- 239000012528 membrane Substances 0.000 title claims abstract description 53
- 238000005370 electroosmosis Methods 0.000 title claims abstract description 31
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 21
- 230000018044 dehydration Effects 0.000 title claims abstract description 18
- 239000004744 fabric Substances 0.000 claims abstract description 64
- 238000001914 filtration Methods 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims description 56
- 239000007788 liquid Substances 0.000 claims description 37
- 239000004020 conductor Substances 0.000 claims description 7
- 239000002861 polymer material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229920001940 conductive polymer Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- 239000012065 filter cake Substances 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 238000000034 method Methods 0.000 description 17
- 208000005156 Dehydration Diseases 0.000 description 15
- 239000002245 particle Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000005119 centrifugation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000909 electrodialysis Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 210000003454 tympanic membrane Anatomy 0.000 description 1
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Classifications
-
- 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
- B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
- B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
- B01D25/285—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying by compression using inflatable membranes
-
- 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
- B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
- B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/15—Treatment of sludge; Devices therefor by de-watering, drying or thickening by treatment with electric, magnetic or electromagnetic fields; by treatment with ultrasonic waves
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a filter unit of a membrane filter press based on electroosmosis reinforced dehydration, wherein a filter unit body comprises a membrane plate and filter plates arranged on two sides of the membrane plate, the membrane plate comprises a central plate and press plate frames positioned on two sides of the central plate, the press plate frames are fixed on the central plate, the middles of two sides of the central plate and the filter plates are both provided with concaves, a membrane and press frame filter cloth are fixed at an inner frame of the press plate frame, the press frame filter cloth is positioned at one side of the filter plates at one side of the membrane position central plate, the filter plate filter cloth is arranged on two sides of the filter plates, lugs are arranged on two sides of the central plate and the filter plates, and conductive slide rails for placing the lugs are arranged on two sides of the filter unit body and are respectively an anode conductive slide rail and a cathode conductive slide rail. In the invention, the hangers and the conductive slide rails are used as power supply bodies of all the filtering units, and the conductivity of the hangers on the diaphragm plate and the filter plate is utilized to adjust the cathode and the anode according to the requirement, thereby avoiding the complicated circuit design.
Description
Technical Field
The invention relates to the field of membrane filter presses, in particular to a filtering unit of a membrane filter press based on electroosmosis reinforced dehydration.
Background
Naturally occurring solids (e.g., soil, rock, river or lake sediments, etc.) often have surfaces that are electrically (and in most cases negatively) charged. When these solid particles come into contact with water, the charged surface of the solid particles can adsorb a part of water molecules under the action of electrostatic attraction, thereby forming weakly bound water. Conventional dewatering techniques typically rely on mechanical forces (e.g., physical pressing, centrifugation) or heat (e.g., heat drying) to effect solid-liquid separation. Wherein, most of the gravity water can be removed by physical squeezing or centrifugation, and weak bound water is difficult to remove; the heat drying technology can dry the gravity water and the bound water, but the energy consumption is huge.
Since the discovery of electroosmosis in solid-liquid systems, electroosmosis techniques have also been applied in the field of solid-liquid separation. The principle of electroosmosis is based on the fact that electric properties of the surfaces of solid particles generate double electric layers in a liquid phase, electric charges in the double electric layers move to electrodes by applying an external electric field, drag force is formed on weak bound water in the process, and therefore the water in pore channels is driven to flow along with the drag force. Thus, it can be seen that: the mechanical dehydration mechanism is to realize solid-liquid separation by driving gravity water; the dehydration mechanism of electroosmosis is to drive the weakly bound water on the surface of solid particles to realize solid-liquid separation. Therefore, based on respective dehydration mechanisms of mechanical force and electroosmosis, the mechanical force + electroosmosis cooperative process is widely applied to the field of solid-liquid separation.
Mechanical pressing is the most common process that relies on mechanical forces for dewatering. Compared with the centrifugal dehydration process, the mechanical pressing process has the advantages of less investment of equipment, large treatment capacity and convenient operation, thereby having remarkable cost benefit. Common mechanical pressing process equipment is as follows: a box filter press, a plate and frame filter press, a diaphragm filter press, a belt filter press, a screw stacking machine and the like. Compared with a belt filter press and a spiral shell stacking machine, the box type, plate frame and membrane filter press has the remarkable characteristic of good dehydration effect. Therefore, the box type, plate and frame type and membrane filter presses are the most commonly used mechanical dewatering equipment in geotechnical and municipal engineering at present.
Since most particles from rock or soil have a negative charge on their surface, the effect of electroosmosis is to drive the water in the filter cake towards the cathode. This can lead to several problems:
the filter cake near the anode generates phenomena of dehydration, drying shrinkage and even cracking, and the like, so that the conductivity is reduced, even the filter cake is separated from the anode, the energy consumption of the electroosmosis process is increased, and even the filter cake is completely separated from the anode to interrupt a circuit, so that the electroosmosis process fails. CN201620119895.5 discloses a sludge dewatering metal plate-and-frame filter pressing device with electrodialysis function, but because the plate-and-frame filter pressing device is used, there is no method that can make the filter cake contact with the electrode all the time after the filter cake is formed.
In the collaborative dehydration technology based on plate-and-frame filter press or box filter press and electroosmosis, the main disadvantage is insufficient mechanical pressing force; in the collaborative dehydration technology based on the membrane filter press and the electroosmosis, the problems of complex equipment system and overlong process path generally exist because the membrane used as the anode needs to have electrical conductivity and the conductive membrane needs to be prevented from being short-circuited with the cathode in the tympanic membrane pressing process.
Disclosure of Invention
The invention aims to provide a membrane filter press filtering unit based on electroosmosis reinforced dehydration.
The invention has the innovation points that the hangers and the conductive slide rails are adopted as power supply bodies of all the filtering units, and the conductivity of the hangers on the diaphragm plate and the filter plate is utilized to adjust the cathode and the anode according to the requirement, so that the complicated circuit design is avoided; and the energization is performed simultaneously with the diaphragm pressing, i.e., the diaphragm pressing and the electroosmosis are performed simultaneously. This has the advantage that the filter cake is always under pressure during the electroosmosis process, thereby avoiding the problem of poor contact between the filter cake and the anode.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a filter unit of a membrane filter press based on electroosmosis reinforced dehydration comprises a filter plate body and filter plates arranged on two sides of the filter plate body, wherein the filter plate body comprises a center plate and press plate frames positioned on two sides of the center plate, the press plate frames are fixed on the center plate, the middles of two sides of the center plate and the filter plates are both provided with concaves, a membrane and press frame filter cloth are fixed at the inner frame of the press plate frames, the press frame filter cloth is positioned at one side of the center plate at one side of the membrane, the filter plate filter cloth is arranged on two sides of the filter plates, hangers are arranged on two sides of the center plate and the filter plates, a center conductive hanger is arranged at one side end of the center plate, a center non-conductive hanger is arranged at the other side end of the center plate, the center conductive hanger on the filter plate and the center plate is a filter plate non-conductive hanger at the same side end, and the other side end of the center conductive hanger is a filter plate non-conductive hanger; conductive slide rails for placing hangers are arranged on two sides of the filtering unit body and are respectively an anode conductive slide rail and a cathode conductive slide rail; the central plate is provided with a conductive column mounting hole which penetrates through the surface of the central plate, a central conductive column is arranged in the conductive column mounting hole, the central conductive column is electrically communicated with the central conductive hanging lug through a conductive wire, and the central plate is provided with a central wire hole for the conductive wire to penetrate through; the filter-pressing frame is provided with a conductive connecting column which electrically connects the central conductive column and the diaphragm, and the diaphragm is made of a conductive material; the filter plate comprises an inward concave part and a non-inward concave part, the inward concave part is conductive, the non-inward concave part is non-conductive, a filter plate wire hole for communicating the inward concave part with the cathode hanging lug is formed in the filter plate, and a filter plate conductive column is arranged in the filter plate wire hole and electrically communicates the inward concave part with the filter plate conductive hanging lug.
Furthermore, a diaphragm groove and a filter cloth groove are formed in the inner frame of the pressing plate frame, a diaphragm fixing hole is formed in the side face of the diaphragm groove, and the diaphragm is limited by inserting a diaphragm fixing piece into the diaphragm fixing hole; the filter plate groove side is equipped with the filter cloth fixed orifices, the filter press frame filter cloth fills in the filter cloth mounting through the filter cloth fixed orifices and fixes. The position limitation is convenient.
Further, one of the diaphragm mounts is a conductive connection post. And an additional conductive connecting column is not needed, so that the device is more convenient.
Furthermore, the concave part of the filter plate is made of conductive plastic. Is not easy to corrode.
Further, a membrane sealing strip is arranged in the membrane groove. The sealing effect is better.
Furthermore, liquid inlet holes are formed in the central plate, the filter plates, the filter plate filter cloth, the press frame filter cloth and the diaphragm to form liquid inlet channels, and the liquid inlet holes between the filter plate filter cloth on the two sides of the central plate are connected through a water-stop pipe; the central plate, the pressing plate frame, the filter plate, the filter cloth of the filter plate and the filter cloth of the pressing frame are all provided with a liquid drainage hole and a pressing medium hole, the liquid drainage holes are communicated to form a liquid drainage channel, and the pressing medium holes are communicated to form a pressing medium channel; a filter chamber is formed between the filter cloth of the filter plate and the filter cloth of the pressing frame, a squeezing chamber is formed between the diaphragm and the inner recess of the central plate, a plurality of squeezing medium circulation channels for communicating the squeezing chamber with the squeezing medium channels are arranged on both sides of the central plate, and a liquid drainage circulation channel for communicating the filter chamber with the liquid drainage channel is arranged on both sides of the filter plate and on the pressing frame.
Further, the press media channel is located below the recessed portion. The later press media can be drained by gravity.
Furthermore, there are 2 drainage channels, which are respectively located at the left and right sides of the pressing medium channel. The liquid discharge speed is faster.
Further, the pressing plate frame and the central plate are connected through bolts.
Furthermore, the press frame filter cloth and the filter plate filter cloth are made of conductive materials; the diaphragm is made of conductive polymer material. The press frame filter cloth and the filter plate filter cloth are made of conductive materials, so that the conductivity is better, and the diaphragm is made of conductive high polymer materials and is not easy to corrode.
The invention has the beneficial effects that:
1. in the invention, the hangers and the conductive slide rails are used as power supply bodies of each filtering unit, and the conductivity of the hangers on the diaphragm plate and the filter plate is utilized to adjust the cathode and the anode according to the requirement, thereby avoiding the complicated circuit design; and the energization is performed simultaneously with the diaphragm pressing, i.e., the diaphragm pressing and the electroosmosis are performed simultaneously. This has the advantage that the filter cake is always under pressure during the electroosmosis process, thereby avoiding the problem of poor contact between the filter cake and the anode.
2. The invention adopts the form of clamping a diaphragm plate between two filter plates, namely, adopting a single-side pressing mode, can ensure that electrodes, namely the diaphragm and the conductive concave part on the filter plates are always in contact with the filter plates in the pressing process, can ensure the energy utilization efficiency of electroosmosis, and reduces the fixing cost of equipment to a certain extent.
3. The invention adopts the mode of combining the conductive diaphragm and the filter cloth with the non-conductive pressing plate frame and the non-conductive central plate and simultaneously adopting the mode of arranging the lead inside the central plate to connect the conductive hangers on the central plate with the conductive diaphragm, thereby avoiding the problem that the conductive diaphragm as the anode forms short circuit with the cathode filter plate and the filter cloth.
Drawings
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a schematic view of the structure of the center plate.
FIG. 3 is a schematic longitudinal cross-sectional view of a diaphragm plate.
Fig. 4 is a cross-sectional schematic view of a center plate.
Fig. 5 is a schematic structural diagram of the pressing plate frame.
Fig. 6 is a schematic longitudinal cross-sectional view of the platen frame.
Fig. 7 is a schematic structural view of the filter plate.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
Example 1: as shown in fig. 1, 2, 3, 4, 5, 6, and 7, a membrane filter press filter unit based on electroosmosis reinforced dehydration comprises a filter unit body including a membrane plate 1 and filter plates 2 disposed on both sides of the membrane plate 1, the membrane plate 1 includes a central plate 1.1 and a press plate frame 1.2 disposed on both sides of the central plate 1.1, the press plate frame 1.2 is fixed on the central plate 1.1, and the press plate frame 1.2 and the central plate 1.1 are connected by bolts. The middle parts of two sides of the central plate 1.1 and the filter plate 2 are both provided with concaves, a diaphragm 1.3 and a press frame filter cloth 1.4 are fixed at the inner frame of the press plate frame 1.2, the diaphragm 1.3 is positioned at one side of the central plate 1.1, the press frame filter cloth 1.4 is positioned at one side of the filter plate 2, the filter plate filter cloth 3 is arranged at two sides of the filter plate 2, and the press frame filter cloth 1.4 and the filter plate filter cloth 3 are made of conductive materials; the diaphragm 1.3 is made of conductive polymer material. Hanging lugs are arranged on two sides of the central plate 1.1 and the filter plate 2, a central conductive hanging lug 4.1 is arranged on one side end of the central plate 1.1, a central non-conductive hanging lug 4.2 is arranged on the other side end of the central plate 1.1, a filter plate non-conductive hanging lug 4.3 is arranged on the same side end of the filter plate 2 and the central plate 1.1, and a filter plate conductive hanging lug 4.4 is arranged on the other side end of the filter plate 1.1; conductive slide rails for placing hangers are arranged on two sides of the filtering unit body and are respectively an anode conductive slide rail 5.1 and a cathode conductive slide rail 5.2; the central board 1.1 is provided with conductive column mounting holes 1.11 penetrating through the board surface of the central board 1.1, the conductive column mounting holes 1.11 are internally provided with central conductive columns 1.12, the central conductive columns 1.12 are electrically communicated with the central conductive lugs 4.1 through conductive wires 1.14, and the central board 1.1 is provided with central conductive holes 1.13 for the conductive wires 1.14 to penetrate through; a conductive connecting column 1.21 for electrically connecting the central conductive column 1.12 and the diaphragm 1.3 is arranged on the filter-pressing frame 1.2, and the diaphragm 1.3 is made of a conductive material; the filter plate 2 comprises an inward concave part 2.1 and a non-inward concave part 2.2, the inward concave part 2.1 is conductive, the inward concave part 2.1 of the filter plate 2 is made of conductive plastic, the non-inward concave part 2.2 is not conductive, a filter plate wire hole 2.3 which communicates the inward concave part 2.1 with a filter plate conductive lug 4.4 is arranged in the filter plate 2, and a filter plate conductive column 2.4 is arranged in the filter plate wire hole 2.3 to electrically communicate the inward concave part 2.1 with the filter plate conductive lug 4.4.
A diaphragm groove 1.5 and a filter cloth groove 1.6 are arranged at the inner frame of the pressing plate frame 1.2, a diaphragm fixing hole 1.51 is formed in the side surface of the diaphragm groove 1.5, and a diaphragm fixing piece 1.52 is plugged into the diaphragm fixing hole 1.51 for limiting through the diaphragm 1.3; the membrane groove 1.5 is internally provided with a membrane sealing strip 1.53. One of the membrane mounts 1.52 is a conductive connection post 1.21. The side of the filter plate groove 1.6 is provided with a filter cloth fixing hole 1.61, and the filter cloth 1.4 of the press frame is fixed by plugging a filter cloth fixing piece 1.62 into the filter cloth fixing hole 1.61.
Liquid inlet holes 6 are formed in the central plate 1.1, the filter plates 2, the filter cloth 3 of the filter plates, the filter cloth 1.4 of the press frame and the diaphragm 1.3 to form a liquid inlet channel 7, and the liquid inlet holes 6 between the filter cloth 3 on the two sides of the central plate 1.1 are connected through a water-stop pipe 6.1; the central plate 1.1, the pressing plate frame 1.2, the filter plate 2, the filter cloth 3 and the pressing frame filter cloth 1.4 are all provided with drain holes 8 and pressing medium holes 9, the drain holes 8 are communicated to form a drain channel 10, and the pressing medium holes 9 are communicated to form a pressing medium channel 11; the pressing medium channel 11 is located below the concave portion 2.1, and there are 2 liquid discharge channels 10 respectively located on the left and right sides of the pressing medium channel 11. A filter chamber 12 is formed between the filter cloth 3 of the filter plate and the filter cloth 1.4 of the pressing frame, a squeezing chamber 13 is formed between the diaphragm 1.3 and the concave center plate 1.1, a plurality of squeezing medium circulation channels 14 which are used for communicating the squeezing chamber 13 with the squeezing medium channels 11 are respectively arranged at the two sides of the center plate 1.1, and liquid drainage circulation channels 15 which are used for communicating the filter chamber 12 with the liquid drainage channels 10 are respectively arranged at the two sides of the filter plate 2 and the pressing frame 1.2.
The using method comprises the following steps:
(1) The assembled filter units are placed on a filter press, wherein the central conductive lugs 4.1 on the central plate 1.1 and the non-conductive lugs 4.3 on the filter plates 2 are placed on the anode conductive slide rails 5.1 connected with the positive pole of an external direct current power supply, and the filter units are pressed in a conventional manner, and one filter unit forms two filter chambers 12 and two squeezing chambers 13.
(2) When squeezing, firstly closing the squeezing medium channel 11, and opening the liquid inlet channel 7 and the liquid discharge channel 10; then pumping the slurry to be treated into a filter chamber 12 through a liquid inlet channel 7; solid particles in the slurry are trapped in the filter chamber 12 by the filter plate filter cloth 3 on the filter plate 2 and the press frame filter cloth 1.4 on the press frame 1.2, the filtrate passing through the filter plate filter cloth 3 flows into the drainage channel 10 through the drainage flow channel 15 on the filter plate 2 and is discharged, and the filtrate passing through the press frame filter cloth 1.4 flows into the drainage channel 10 through the drainage channel 15 in the press frame 1.2 and is discharged.
(3) After the filter chamber 12 is filled with solid particles in slurry and forms a filter cake, the liquid inlet channel 7 is closed, the pressing medium channel 11 is opened, a pressing medium (water or gas with certain pressure) is filled into the pressing chamber 13 between the diaphragm 1.3 and the central plate 1.1 on the press plate frame 1.2, the diaphragm 1.3 is pushed by the pressing medium to move towards the filter chamber 12, the filter cake is pressed to form secondary dehydration, filtrate passing through the filter cloth 3 of the filter plate flows into the liquid discharge channel 10 through the liquid discharge flow channel 15 on the filter plate 2 and is discharged, and filtrate passing through the filter cloth 1.4 of the press plate frame flows into the liquid discharge channel 10 through the liquid discharge channel 15 in the press plate frame 1.2 and is discharged.
(4) And (4) turning on a direct current power supply to supply power to the anode conductive slide rail 5.1 and the cathode conductive slide rail 5.2 while the step (3) is carried out. Current flows into the anode conductive slide rail 5.1 from the anode of the direct current power supply, enters the conductive wire 1.14 and the central conductive column 1.12 on the central plate 1.1 through the conductive central conductive hanging lug 4.1 on the anode conductive slide rail 5.1, and enters the diaphragm 1.2.2 through the conductive connecting column 1.21 on the pressure plate frame 1.2; after being conducted by the filter cake, the filter cake flows into the cathode conductive slide rail 5.2 through the conductive concave part 2.1 on the filter plate 2, the conductive pillar 2.4 of the filter plate and the conductive hanging lug 4.4 of the filter plate, and finally returns to the cathode of the power supply.
(5) According to the flowing direction of the current in (4), the diaphragm 1.3 on the press plate frame 1.2 on the filter cake side in the filter chamber 12 is the anode of the filter cake, and the concave part 2.1 in the filter plate 2 on the other side is the cathode of the filter cake. A potential difference is thus created across the filter cake, causing electroosmosis of the water in the filter cake.
(6) If the electroosmosis causes the water in the filter cake to flow to the cathode, the anode conductive slide rail 5.1 is connected with the anode of the direct current power supply; if the water in the filter cake flows to the anode under the action of electroosmosis, the anode conductive slide rail 5.1 is connected with the cathode of the direct current power supply, so that the electroosmosis flow direction of the water is consistent with the water flow direction driven by the diaphragm press, namely the water flows to the filter plate uniformly.
(7) After the dehydration is finished, releasing the pressure in the filter pressing medium channel 11, and at the moment, discharging the pressing medium in the pressing chamber 13 through the pressing medium channel 11 under the action of the self weight; and simultaneously, the direct current power supply is turned off.
(8) The membrane plate 1 and the filter plate 2 are separated, allowing the filter cake to exit the filter chamber 12.
The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (10)
1. A filter unit of a membrane filter press based on electroosmosis reinforced dehydration comprises a filter unit body and filter plates, wherein the filter plates are arranged on two sides of each membrane plate, each membrane plate comprises a central plate and press plate frames positioned on two sides of the central plate, the press plate frames are fixed on the central plates, the middles of two sides of the central plates and the filter plates are both provided with concaves, membranes and press frame filter cloth are fixed at the inner frames of the press plate frames, one side of each membrane position central plate is provided with the press frame filter cloth positioned on one side of the filter plate, and filter plate filter cloth is arranged on two sides of the filter plates; conductive slide rails for placing hangers are arranged on two sides of the filtering unit body and are respectively an anode conductive slide rail and a cathode conductive slide rail; the central plate is provided with a conductive column mounting hole which penetrates through the surface of the central plate, a central conductive column is arranged in the conductive column mounting hole, the central conductive column is electrically communicated with the central conductive hanging lug through a conductive wire, and the central plate is provided with a central wire hole for the conductive wire to penetrate through; the filter-pressing frame is provided with a conductive connecting column for electrically connecting the central conductive column with the diaphragm, and the diaphragm is made of a conductive material; the filter plate comprises an inward concave part and a non-inward concave part, the inward concave part is conductive, the non-inward concave part is non-conductive, a filter plate wire hole for communicating the inward concave part with the cathode hanging lug is formed in the filter plate, and a filter plate conductive column is arranged in the filter plate wire hole and electrically communicates the inward concave part with the filter plate conductive hanging lug.
2. The electroosmosis-enhanced-dehydration-based membrane filter press filtering unit according to claim 1, wherein a membrane groove and a filter cloth groove are formed at the inner frame of the pressing plate frame, a membrane fixing hole is formed in the side surface of the membrane groove, and the membrane is limited by inserting a membrane fixing piece into the membrane fixing hole; the filter plate is characterized in that filter cloth fixing holes are formed in the side faces of the filter plate grooves, and the filter cloth fixing pieces are plugged into the filter cloth fixing holes for fixing the filter cloth of the pressing frame.
3. The electroosmotic enhanced dewatering-based membrane filter press filtration unit of claim 2, wherein one of the membrane mounts is a conductive connection post.
4. The filter unit of a membrane filter press based on electroosmotic enhanced dewatering of claim 1, wherein the recessed portion of the filter plate is made of conductive plastic material.
5. The electroosmotic enhanced dewatering-based membrane filter press filtration unit according to claim 2, wherein a membrane sealing strip is arranged in the membrane tank.
6. The electroosmosis-enhanced-dehydration-based membrane filter press filtering unit according to claim 1, wherein the central plate, the filter plates, the filter plate filter cloth, the press frame filter cloth and the membrane are all provided with liquid inlet holes to form a liquid inlet channel, and the liquid inlet holes between the filter plate filter cloth on both sides of the central plate are connected through a water-stop pipe; the central plate, the pressing plate frame, the filter plate, the filter cloth of the filter plate and the filter cloth of the pressing frame are all provided with a liquid drainage hole and a pressing medium hole, the liquid drainage holes are communicated to form a liquid drainage channel, and the pressing medium holes are communicated to form a pressing medium channel; a filter chamber is formed between the filter cloth of the filter plate and the filter cloth of the pressing frame, a squeezing chamber is formed between the diaphragm and the inner recess of the central plate, a plurality of squeezing medium circulation channels for communicating the squeezing chamber with the squeezing medium channels are arranged on both sides of the central plate, and liquid drainage circulation channels for communicating the filter chamber with the liquid drainage channels are arranged on both sides of the filter plate and on the pressing frame.
7. The electroosmotic enhanced dewatering-based membrane filter press filtration unit of claim 6, wherein the press media channel is located below the recessed portion.
8. The electroosmotic enhanced dewatering-based membrane filter press filtration unit according to claim 6, wherein there are 2 drainage channels, one on each of the left and right sides of the press media channel.
9. The electroosmotic enhanced dewatering-based membrane filter press filtration unit according to claim 1, wherein the press frame and the center plate are connected by bolts.
10. The electroosmosis-enhanced-dehydration-based membrane filter press filtration unit according to claim 1, wherein the press frame filter cloth and the filter plate filter cloth are made of conductive materials; the diaphragm is made of conductive polymer material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211116350.5A CN115364538B (en) | 2022-09-14 | 2022-09-14 | Membrane filter press filter unit based on electroosmosis enhanced dehydration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211116350.5A CN115364538B (en) | 2022-09-14 | 2022-09-14 | Membrane filter press filter unit based on electroosmosis enhanced dehydration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115364538A true CN115364538A (en) | 2022-11-22 |
| CN115364538B CN115364538B (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211116350.5A Active CN115364538B (en) | 2022-09-14 | 2022-09-14 | Membrane filter press filter unit based on electroosmosis enhanced dehydration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116022990A (en) * | 2023-01-06 | 2023-04-28 | 清华大学 | Electroosmosis and filter pressing combined dehydration device |
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| US3615015A (en) * | 1968-10-29 | 1971-10-26 | Passavant Werke | Filter press |
| JP2008043903A (en) * | 2006-08-18 | 2008-02-28 | Ebara Corp | Heating filter plate of filter press |
| CN205773889U (en) * | 2016-04-19 | 2016-12-07 | 谢俊磊 | A kind of laboratory waste liquor treatment equipment |
| CN206746078U (en) * | 2017-03-28 | 2017-12-15 | 河南利诺生化有限责任公司 | Alpha linolenic acid filter |
| CN110759532A (en) * | 2019-11-07 | 2020-02-07 | 山东鑫动能锂电科技有限公司 | High-salt concentrated water treatment process for producing iron phosphate by sodium method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3615015A (en) * | 1968-10-29 | 1971-10-26 | Passavant Werke | Filter press |
| JP2008043903A (en) * | 2006-08-18 | 2008-02-28 | Ebara Corp | Heating filter plate of filter press |
| CN205773889U (en) * | 2016-04-19 | 2016-12-07 | 谢俊磊 | A kind of laboratory waste liquor treatment equipment |
| CN206746078U (en) * | 2017-03-28 | 2017-12-15 | 河南利诺生化有限责任公司 | Alpha linolenic acid filter |
| CN110759532A (en) * | 2019-11-07 | 2020-02-07 | 山东鑫动能锂电科技有限公司 | High-salt concentrated water treatment process for producing iron phosphate by sodium method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116022990A (en) * | 2023-01-06 | 2023-04-28 | 清华大学 | Electroosmosis and filter pressing combined dehydration device |
| CN116022990B (en) * | 2023-01-06 | 2024-07-16 | 清华大学 | Electroosmosis and filter pressing combined dehydration device |
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|---|---|
| CN115364538B (en) | 2024-03-26 |
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