An automated plate and frame filter press

Abstract

The present invention discloses an automated plate-and-frame filter press, comprising a guide rail, on which a compression plate and a plurality of filter plates are mounted, wherein the plurality of filter plates include a first filter plate, a second filter plate, ..., an N-1 filter plate, and an N-th filter plate, arranged in sequence. After a driving mechanism pushes the compression plate to move along the guide rail so that the plurality of filter plates and the compression plate come into contact with each other, the compression plate and the first filter plate are non-sealed, and two adjacent filter plates are closed to form a closed filter plate chamber. One end of the filter cloth is fixed to the left side of the first filter plate, and then passes through the right side of the second filter plate, the left side of the third filter plate, ..., and the right side of the N-1 filter plate, and finally connects to an automatic winding mechanism located on the left side of the N-th filter plate. Compared with a conventional plate-and-frame filter press, the electrolyte can be recycled, material costs are reduced, product cleaning and collection are achieved, and the filtration, cleaning, and washing steps can be performed automatically, thereby reducing labor costs and improving work efficiency.

Description

Technical Field

[0001] The invention relates to an automated control technology for a plate and frame filter press, and in particular to an automated plate and frame filter press. Background Art

[0002] During electrolytic processing, due to the small processing gap, if the electrolytic products in the electrolyte are not removed from the processing area in a timely manner, the processing speed will be reduced or even interrupted. If the electrolytic products are discharged directly without treatment, they will also cause environmental pollution. Therefore, we need a plate and frame filter press to filter the electrolytic products, which can achieve the purpose of reusing the electrolyte and reduce environmental pollution. However, traditional plate and frame filter presses generally have a low degree of automation. For example, manual removal of filtered filter cake and manual cleaning of filter cloth are inefficient and labor-intensive. In addition, the wastewater discharge during cleaning poses environmental pollution problems. Summary of the Invention

[0003] The present invention is designed to overcome the problems of existing plate and frame filter presses, such as the difficulty in removing the filter cake, the difficulty in cleaning the filter cloth, the inability to fully automate the overall equipment, the difficulty in unmanned operation of the plate and frame, the frequent need for manual cleaning of the filter cloth, and the drainage of sewage during cleaning.

[0004] The technical solution disclosed in the present invention is as follows: an automated plate and frame filter press, comprising a guide rail, a compression plate and a plurality of filter plates mounted on the guide rail, wherein the plurality of filter plates comprise a first filter plate, a second filter plate, ..., an N-1 filter plate, and an N filter plate arranged in sequence, the filter plates having a through hole at their centers, the through hole on the first filter plate being a liquid outlet, and the through hole on the N filter plate being equipped with a feed pipe, wherein, after a driving mechanism pushes the compression plate to move along the guide rail so that the plurality of filter plates and the compression plate are in contact with each other, the compression plate and the first filter plate are in non-sealed engagement, and two adjacent filter plates are closed to each other to form a closed filter plate chamber.

[0005] One end of the filter cloth is fixed on the left side of the first filter plate, and then passes through the right side of the second filter plate, the left side of the third filter plate... the right side of the N-1 filter plate, and is connected to the automatic winding mechanism on the left side of the N filter plate.

[0006] Among them, it is preferred that the Nth filter plate is fixedly connected to the box body.

[0007] On the basis of the above solution, as a preferred embodiment, both sides of the upper ends of the filter plate and the pressing plate are connected to rollers through L-shaped connecting pieces, and the rollers are located in the grooves on the guide rails.

[0008] On the basis of the above scheme, as a preference, one end of the first connecting rod is slidably installed in the guide groove on the upper end of the clamping plate, and the other end is hinged to the upper end surface of the first filter plate, one end of the second connecting rod is hinged to the other end of the first connecting rod, and the other end of the second connecting rod is hinged to the upper end surface of the second filter plate... until one end of the Nth connecting rod is hinged to the other end of the N-1th connecting rod and is located in the guide groove on the upper end surface of the N-1th filter plate, and the other end of the Nth connecting rod is hinged to the upper end plate of the Nth filter plate.

[0009] Two adjacent connecting rods are hinged to form a first hinge point and a second hinge point on any one of the connecting rods. The first hinge point cannot move horizontally, and the second hinge point moves in the guide groove.

[0010] Based on the above scheme, as a preference, the automatic winding mechanism includes a cylinder and a scroll spring located in the cylinder, the filter plate extends into the cylinder from the opening on the cylinder to connect to the scroll spring, brushes are provided on both sides of the opening of the cylinder, and the filter cloth passes between the brushes on both sides of the opening.

[0011] Based on the above solution, preferably, the filter plates are provided with grooves on the front and rear sides, and when two adjacent filter plates are closed to each other, a closed filter plate chamber is formed at the grooves.

[0012] On the basis of the above scheme, as a preference, elastic water pipes are provided on both sides of the filter plate, and the elastic water pipes are connected to the cleaning holes on the filter plate through pipe joints. The cleaning holes are located on the left and right end faces or the front and rear end faces of the filter plate, and when the cleaning holes are located on the front and rear end faces of the filter plate, they are arranged around the groove.

[0013] On the basis of the above scheme, as a preference, the guide rail is installed in the box body. The bottom of the box body is a bottom plate, the bottom plate includes a front bottom plate and a rear bottom plate, the rear bottom plate is fixedly connected to the side plate of the box body, the front bottom plate is an automatic door, and the side plate of the box body has a guide groove, a guide wheel is installed in the guide groove, the guide wheel is connected to the push plate, and the push plate is fixedly connected to the drive unit located outside the box body.

[0014] On the basis of the above solution, preferably, the guide groove is formed by two channel steels fixed to the bottom of the box side plate.

[0015] On the basis of the above scheme, as a preferred embodiment, the automatic door includes a frame, which is fixed to the outside of the box body, with a rotating shaft installed on the frame, a gear fixedly installed on the rotating shaft, the gear engages the rack, and an automatic door movement groove is provided on the side panel of the box body. The pulley is installed on the back of the rack and fixedly connected to the front bottom plate, and sealing strips are installed around the front bottom plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This patent proposes a fully automated plate and frame filter press, which automatically cleans the filter cake and does not require manual cleaning of the filter cloth, reducing labor costs and the cleaning time of the filter cake and filter cloth, and improving work efficiency.

[0018] 2. This patent proposes to reflow the filtered electrolyte into the plate and frame to clean the filter cloth structure. Compared with the manual cleaning of the filter cloth in the traditional filter press, the electrolyte after cleaning will reflow into the electrolytic waste liquid pool through the drain pipe outlet at the bottom of the box, solving the problem of sewage discharge during cleaning, reducing environmental pollution and improving the recycling rate of the electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the plate and frame filter press;

[0020] Figure 2 This is a schematic diagram of the overall half-section structure of the plate and frame filter press;

[0021] Figure 3 This is a schematic diagram of the plate and frame operation structure of the plate and frame filter press;

[0022] Figure 4 This is a schematic diagram of the filter plate structure of a plate and frame filter press;

[0023] Figure 5 This is a schematic diagram of the mud cake collection structure of the plate and frame filter press;

[0024] Figure 6 It is a structural diagram of the automatic door;

[0025] The reference numbers in the figure are: 1-automatic door, 2-box, 3-feed pipe, 4-manual door, 5-door handle, 6-door hinge, 71-driving mechanism, 72-driving, 8-driving mechanism bracket, 9-elastic water pipe, 10-drain pipe, 11-electromagnetic three-way valve, 111-electromagnetic three-way valve sewage pipe, 112-electromagnetic three-way valve filter pipe, 12-front bottom plate, 13-automatic winding mechanism, 14-channel steel, 15- Filter plate, 151-groove, 152-pressure plate, 16-second hinge point, 18-filter cloth, 19-drainage hole, 20-push plate, 22-guide groove, 23-pulley, 24-guide rail, 25-cleaning hole, 26-frame, 27-guide groove, 28-sealing strip, 30-automatic door movement groove, 31-gear bar, 32-shaft, 33-gear, 34-pulley, 35-first hinge point, 36-pipe joint. Implementation Method

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0027] like Figure 1-6 As shown, the filter press includes a box body 2, and a manual door 4 is provided on the upper end surface of the box body. The manual door has a door handle 5 on one side and is connected to the box body through a door hinge 6 on the other side.

[0028] When the electrolyte solid-liquid separation mold is compressed, the driving mechanism 71 (such as a cylinder, a hydraulic cylinder, etc.) pushes the pressing plate to move forward and drives all the filter plates to move forward until the two adjacent filter plates are in contact with each other. In this state, the pressing plate and the first filter plate are not airtightly matched, and the two adjacent filter plates are closed to form a closed filter plate chamber. Among them, since the front and back sides of the filter plate have grooves, when the two adjacent filter plates are closed to each other, a closed filter plate chamber is formed at the grooves.

[0029] During the compression process, the automatic rewinding mechanism, or scroll spring / disc spring / spring mechanism, plays a crucial role in the retraction and extension of the filter cloth 18. The cylinder 13 and the scroll spring located within it allow the filter cloth to extend through the cylinder opening and connect to the scroll spring. Brushes are located on either side of the cylinder opening, allowing the filter cloth to pass between them. During compression, the scroll spring automatically retracts the filter cloth. When the drive mechanism returns, or when the filter plates 15 open, the filter cloth 18 is pulled out, placing the scroll spring under tension. During the plate compression process, any fine mud on the filter cloth 13 (not removed with the filter cake or during cleaning) is further cleaned of potential mud by the friction of the brushes during the retraction process.

[0030] After the compression is completed, the electrolyte flows into the chamber from the feed pipe 3 and is stored therein. The solids remain on the filter cloth 18 and gradually accumulate on the filter cloth 18 to form a filter cake, while the filtrate portion penetrates the filter cloth 18 to form a clear liquid without solids. In this filtration process, the filter cloth between the Nth filter plate and the N-1th filter plate is the first stage of filtration, and the second filter plate and the first filter plate are the last stage of filtration. The adhesion between the filter plate and the filter cloth should be much smaller than the adhesion between the filter plate and the filter cloth. As the filtration process proceeds, the feeding continues, and the filtrate is continuously discharged from the gap / interval between the first filter plate 15 and the compression plate, and flows from the electromagnetic three-way valve filter pipe 112 installed on the bottom plate to the filtered electrolyte tank. As the filtration resistance increases, the thickness of the filter cake gradually increases. When the first-stage filtration fails, the feeding is stopped, the driving mechanism moves in the reverse direction (gradually open), and the filter plates separate from each other. Since the filter plates are connected by a connecting rod mechanism, the separation distance between adjacent filter plates is controllable, and the adjacent connecting rods can be connected by a spring to play a protective role. The filter cake on the filter cloth automatically falls to the bottom of the box due to the scraping force, friction force and self-gravity of the relative movement between the filter plate 15 and the filter cloth 18.

[0031] When the filter cake cleaning process begins, the gear rotates under the drive of the motor to drive the door to open, and the push plate pushes forward from the back to push the filter cake out of the box from the door.

[0032] The frame of the box body uses channel steel 14 as raw material, and the overall structure of the box body 2 is formed by spot welding. Iron sheets are laid all around. The channel steels at the bottom of the front and rear sides of the box body are relatively arranged to form guide grooves 27. The guide wheels on both sides of the push plate 20 are placed in the guide grooves, and the lower end of the push plate contacts the bottom of the box body. Under the power of the drive 72 (cylinder, hydraulic cylinder, etc.), the push plate starts to move, and the fallen mud cake is pushed out of the filter press box from the door. During the door movement process, the motor is run, and the motor drives the shaft 32 to make the gear 33 move counterclockwise. The gear bar 26 moves to the right through the engagement between the teeth. The gear rack transmission structure drives the pulley 34, and the pulley 34 drives the door 12 to slide left and right relative to the door frame, so that the door 12 opens to clean the filter cake. When the filter cake is cleaned, the motor can be run again to close the bottom outlet.

[0033] During the cleaning process, most of the mud cake in the filter press has been removed through the above steps, but the filter cake in the filter cloth 18 cannot be completely removed by the friction between the filter cloth and the plate frame and its own gravity, and a small amount of mud still sticks to the filter cloth 18. At this time, the cleaning liquid is connected to the bottom interface of the plate frame through the elastic water pipes 9 arranged on both sides of the filter plate, and flows out from the cleaning holes 25 on both sides of the plate frame inlet to clean the filter cloth, and at the same time, the filter plate chamber can also be cleaned. The cleaned electrolyte flows out again through the drainage holes 19 and drainage pipe 10 below the pressing plate 152, and flows back to the electrolytic waste liquid tank through the electromagnetic three-way valve sewage pipe 111. The filtered electrolyte can be used as a resource for cleaning the filter cloth next time, and the outlet for recovering the electrolyte is installed below the pressing plate. Since there is little mud under the pressing plate 152, the drainage hole 19 is not easy to be blocked, and it can be used for a long time.

[0034] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automated plate and frame filter press, characterized in that: The invention comprises a guide rail, on which a pressing plate and a plurality of filter plates are mounted, wherein the plurality of filter plates comprise a first filter plate, a second filter plate, ... an N-1 filter plate, and an N filter plate, which are sequentially arranged. The filter plates have a through hole at the center thereof, the through hole on the first filter plate being a liquid outlet, and the through hole on the N filter plate being equipped with a feed pipe. When a driving mechanism pushes the pressing plate to move along the guide rail so that the plurality of filter plates and the pressing plate are fitted together, the pressing plate and the first filter plate are non-sealed, and two adjacent filter plates are closed to each other to form a closed filter plate chamber. One end of the filter cloth is fixed on the left side of the first filter plate, and then passes through the right side of the second filter plate, the left side of the third filter plate, and the right side of the N-1 filter plate, and then connects to the automatic winding mechanism on the left side of the N filter plate. The upper ends of the filter plate and the pressing plate are connected to the rollers through L-shaped connectors. The rollers are located in the grooves on the guide rails. The connecting rod mechanism includes a first connecting rod, one end of which is slidably mounted in a guide groove on the upper end of the pressing plate, and the other end is hinged to the upper end surface of the first filter plate, one end of the second connecting rod is hinged to the other end of the first connecting rod, and the other end of the second connecting rod is hinged to the upper end surface of the second filter plate... until one end of the Nth connecting rod is hinged to the other end of the N-1th connecting rod and is located in the guide groove on the upper end surface of the N-1th filter plate, and the other end of the Nth connecting rod is hinged to the upper end surface of the Nth filter plate. The automatic winding mechanism includes a cylinder and a scroll spring located inside the cylinder. The filter cloth extends from the opening on the cylinder into the cylinder and connects to the scroll spring. Brushes are provided on both sides of the opening of the cylinder. The filter cloth passes between the brushes on both sides of the opening. Elastic water pipes are provided on both sides of the filter plate, and the elastic water pipes are connected to the cleaning holes on the filter plate through pipe joints. The cleaning holes are located on the left and right end faces or the front and rear end faces of the filter plate. When the cleaning holes are located on the front and rear end faces of the filter plate, they are arranged around the groove. The guide rail is installed in the box body. The bottom of the box body is the bottom plate. The bottom plate includes the front bottom plate and the rear bottom plate. The rear bottom plate is fixedly connected to the side plate of the box body. The front bottom plate is an automatic door. The side plate of the box body has a guide groove. The guide groove is installed with a guide wheel. The guide wheel is connected to the push plate. The push plate is fixedly connected to the drive unit outside the box. The guide groove is formed by two channel steels fixed to the bottom of the box side panels. The automatic door includes a frame, which is fixed to the outside of the box. A rotating shaft is installed on the frame, and a gear is fixed on the rotating shaft. The gear meshes with a gear bar. There is an automatic door movement groove on the side panel of the box. The pulley is installed on the back of the gear bar and fixedly connected to the front bottom plate. Sealing strips are installed around the front bottom plate.

2. The automated plate-and-frame filter press according to claim 1, wherein: There are grooves on the front and back sides of the filter plate. When two adjacent filter plates are closed to each other, a closed filter plate chamber is formed at the grooves.

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