A plate and frame filter press

Abstract

A plate and frame filter press belongs to the field of filter presses, and includes a cooling or heating device, a frame, a feed port, a thrust plate, a filter plate group, a beam, a clamping plate, a power cylinder, a flap driving device, a flap supporting device, and a flap; the cooling or heating device is installed near the frame, and includes a medium circulation device and a pipeline; the medium circulation device includes a driving motor, a circulation pump, and a medium storage device; it has the characteristics of being able to adapt to different temperature requirements of the filtered material and reduce damage to the flap and the flap supporting device.

Description

Technical Field

[0001] The invention belongs to the field of filter presses, and in particular relates to a plate-and-frame filter press. Background Art

[0002] A filter press is a solid-liquid separation device that uses a filter medium to apply a certain pressure to an object to cause liquid to seep out. A plate-and-frame filter press is a commonly used type of filter press. Usually, a plate-and-frame filter press includes a frame, a filter plate group, a feed pump, a liquid outlet, and a liquid receiving flap. The filtered material is injected into the filter plate group from the feed port at one end of the filter plate group through a feed pump. After being filtered by the filter plate group, the clear liquid flows out from the bottom of the filter plate group and can be used or discharged after being collected. The filter plate group is generally composed of multiple filter plates, and a closed filter chamber is formed between adjacent filter plates. External pressure is applied to filter the filter. The structure and working mechanism of the filter plate determine the quality of solid-liquid separation. The amount and the effective life of the filter plate. Most of the existing filter plates are fed from the middle of the filter plate. Under normal circumstances, the solid content of the feed liquid is 20-45%, which is a viscous mixed liquid with a low flow rate. After entering the filter chamber, it first fills the first few filter plates and pushes them backward one by one. The problem brought about by this is that the internal pressure in the filter chamber filled with the material first increases, and the filter plate will deform to the side with smaller internal pressure. If the deformation exceeds the elastic limit of the filter plate, the filter plate will become unusable. In particular, for the feed liquid that will crystallize or solidify at room temperature, solid-liquid separation and filtration cannot be performed at room temperature. Only by heating the material and the filter plate can filtration be achieved. Some materials need The required filtration temperature may reach 150-300 degrees, and ordinary filter plates cannot work at all; the liquid receiving flap of the plate and frame filter press is an important component of the plate and frame filter press, located below the filter plate group. When the filter press is filtering, due to the internal pressure of the filter press, the liquid seeps out from the filter cloth, and the liquid receiving flap is to collect and process the seeping liquid; when the filter press is filtering, the flap is turned up to collect the liquid seeping from the bottom of the filter plate group, and when the filter press is unloading the filter cake, the flap is turned down to make room for the filter cake to fall, so the liquid receiving flap must be frequently turned up and down. The existing flap generally uses a slender rod of a tube as the flap rotation axis. The flap is supported and rotated, and the aspect ratio of the rod is generally 20 to 80. Under the combined effect of its own weight and load, it will sag, which causes the shaft head to change from the horizontal line, causing interference between the shaft head and the support supporting the flap shaft. There is only line contact or point contact, which makes the flap shaft and the support very easy to wear and need to be replaced frequently, resulting in long downtime and high maintenance costs. On the other hand, the liquid receiving flap of the plate and frame filter press is filtered at high temperature through humidification for liquid that will crystallize or solidify at room temperature. The liquid that seeps onto the liquid receiving flap will crystallize or solidify, causing the flap to solidify more and more, increasing the chance of damage to the flap. Summary of the invention

[0003] In view of the above-mentioned problems existing in the existing plate and frame filter press, the present invention proposes a plate and frame filter press, which is characterized by comprising a cooling or heating device, a frame, a feed port, a thrust plate, a filter plate group, a beam, a clamping plate, a power cylinder, a flap driving device, a flap supporting device, and a flap; the cooling or heating device is installed near the frame, and comprises a medium circulation device and a pipeline; the medium circulation device comprises a driving motor, a circulation pump, and a medium storage device; the driving motor is installed near the medium storage device, and its power output shaft is connected to the power input shaft of the circulation pump, so as to drive the circulation pump to operate; the circuit part of the driving motor is connected to the control system of the plate and frame filter press; the circulation pump Installed near the medium storage device, the inlet of the circulation pump is connected to the inner cavity of the medium storage device and immersed in the heating or cooling medium, and the outlet of the circulation pump is tightly connected to the interface at one end of the pipeline, and can output the heating or cooling medium into the pipeline; the medium storage device is installed near the frame, or connected to the frame, and includes a liquid storage tank, a liquid outlet, a liquid inlet, and a heating device; the liquid storage tank is a closed cavity with an opening, and its inner cavity contains liquid medium; the liquid outlet is tightly connected to the inlet of the circulation pump; the liquid inlet is connected to one end of the pipeline; the heating device is installed in the liquid storage tank, and can heat the liquid medium in the liquid storage tank; the pipeline is installed on the medium circulation device , and are respectively connected to the medium circulation channels on the flap and the filter plate group and then return to the medium circulation device to form a loop; the frame is installed on the base and can support the beam, the power cylinder, the accessories and the control elements; the feed port is arranged at the end of the thrust plate and is connected to the filtered material supply pump through a pipeline; the thrust plate is installed on the frame and is fixedly connected to the frame; the filter plate group is installed on the beam and is floatingly mounted on the beam; the filter plate group is composed of a plurality of filter plates, each of which fits each other, and there is a filter cavity between the two filter plates; the beam is installed on the frame and is fixedly connected to the frame; the pressing plate is sleeved on the beam and can slide on and along the beam, and its end surface area is the same as the filter The end surface area of ​​the plate matches; the power cylinder is installed on the frame and is located at one end of the beam, fixedly connected to the frame, and the end of its piston rod is connected to the clamping plate, which can push the clamping plate to make linear motion; the flap driving device is installed on the frame and fixedly connected to the frame, including a driving element and a transmission device; the driving element is installed on the frame and fixedly connected to the frame, and the power output part is connected to the transmission device; one end of the transmission device is connected to the driving element, and the other end is connected to the transmission wheel at the end of the flap shaft; the flap support device is installed on the frame and fixedly connected to the frame; the flap support device is located at both ends of each flap shaft, which can support the flap and realize the rotation of the flap along the flap shaft;The flap is installed on the flap support device through the flap shaft on one side of the flap, and is connected to the flap support device in a sleeve, and can rotate in the flap support device, wherein the flap shaft end located at the same end of the flap drive device is installed with a transmission wheel, which can realize the rotation of the flap shaft under the drive of the flap drive device. ;

[0004] Furthermore, the driving element in the flap driving device is a combination of a motor and a reducer.

[0005] Furthermore, the transmission device in the flap driving device is a chain drive.

[0006] Furthermore, the filter plate is composed of a feed filter plate and a non-feed filter plate.

[0007] In order to overcome the problem in the existing plate and frame filter press that the flap shaft is bent and deformed due to gravity, causing interference between the flap shaft and the flap support device, thereby making the flap shaft and the flap support device easily damaged, the present invention proposes a flap support device, characterized in that: the flap support device includes a mounting support, an inner slip ring, and an outer slip ring; the mounting support is arranged on the periphery of the outer slip ring, and the outer periphery is provided with a fixed mounting structure connected to the frame, and this fixed mounting structure is a step or a protrusion with a bolt hole; the mounting support is provided with an outer slip ring mounting hole, and its diameter matches the outer diameter of the outer slip ring, and the outer slip ring can be fastened in this mounting hole ; The outer slip ring is installed in the mounting hole on the mounting support, and is annular. Its outer ring matches the outer slip ring mounting hole on the mounting support and can be fixedly connected. Its inner hole is a spherical hole, and its spherical surface radius is the same as the spherical surface radius on the outer diameter of the inner slip ring; The inner slip ring is installed in the inner hole of the outer slip ring, and is annular. Its inner hole is a cylindrical hole, which matches the end of the flap shaft and can be fixedly connected to the flap shaft; The outer surface of the inner slip ring is a spherical surface protruding outward, and the radius of the spherical surface matches and fits with the spherical surface of the inner hole of the outer slip ring; The height between the inner hole of the outer slip ring and the outer spherical surface of the inner slip ring is not more than 0.5 mm, which makes it easy to install the inner slip ring in the outer slip ring.

[0008] Furthermore, the inner sliding ring and the outer sliding ring are both made of wear-resistant materials.

[0009] During operation, the end of the flap shaft is installed in the inner hole of the inner slip ring and rotates together with the inner slip ring, and the inner slip ring slides and rotates relative to the outer slip ring in the outer slip ring; when the flap shaft is deformed, the axis line of the inner slip ring deflects as the flap shaft is deformed. Since the contact surface between the inner slip ring and the outer slip ring is spherical, it can adapt to the deflection of the inner slip ring without affecting the normal rotation of the inner slip ring in the outer slip ring and increasing unnecessary wear, thereby reducing the chance of damage to the flap support device and the flap shaft.

[0010] In order to overcome the defects of the existing plate and frame filter press where the material is fed from the center of the filter plate, causing the front-stage filter plate of the filter plate group to be deformed and the filtering efficiency to be low, the present invention proposes a filter plate group, characterized in that: it comprises a feed filter plate and a non-feed filter plate; the feed filter plate and the non-feed filter plate are arranged crosswise, the end faces of the filter plates are fitted together, and a filter cavity is formed between the two filter plates; the feed filter plate comprises a filter plate body, a functional hole, a feed hole, a side main feed hole, a side feed channel, a seepage hole, and a filter cavity; the filter plate body is the filter plate main body, made of metal material, and is rectangular, and its size matches the space between the beams of the plate and frame filter press; the functional hole is arranged at the corner of the filter plate body and can be used as a liquid outlet hole; there is more than one functional hole, which penetrates the thickness of the filter plate body; the feed hole is arranged on the filter plate body and is located at the same corner as the main side feed hole; the feed hole penetrates the thickness of the filter plate body and is aligned with the side The feed channel is connected to the filter cavity on the side of the filter plate body; the side main feed hole is arranged at a corner of the filter plate body, penetrates the thickness of the filter plate body and is perpendicular to the end face of the filter plate body; when multiple filter plate bodies are stacked together, the main side feed hole on each filter plate should be located at the same position on the filter plate body, and the side main feed holes of multiple filter plates form a main feed channel; the side feed channel is arranged between the main side feed hole and the feed hole, and connects the main side feed hole and the feed hole; the seepage hole is arranged in the middle of the side of the filter plate body, penetrates the thickness between the filter cavities on both side surfaces of the filter plate body, and in the filtering working state, the end of the seepage hole is covered with filter material; there are multiple seepage holes, which are evenly distributed inside the filter cavity; the filter cavity is arranged in the middle of both sides of the filter plate body, which is a recessed area; when two filter plate bodies are fitted together, the filter cavity between the filter plate bodies forms a cavity that can accommodate the filtered material.

[0011] Due to the use of side main feed holes, when the filtered material enters the filter plate group from the main feed channel composed of multiple main side feed holes, due to the effect of pressure, the filtered material is distributed from the main feed channel to the main side feed holes on each feed filter plate of the filter plate group, and then enters the side feed channel, then enters the feed holes, and finally enters the filter cavity. Under the effect of pressure applied to both ends of the filter plate group, the filtered material is squeezed, and the liquid seeps out through the filter material through the seepage holes and flows out from the functional holes. The residue remains in the filter cavity and falls under the filter plate group when the filter plate group is pulled apart. In this way, when the filtered material enters the inside of the filter plate group, pressure concentration will not be formed, causing deformation and damage of the filter plate.

[0012] In order to overcome the problem that the filter plate needs to adapt to certain filter materials that require a certain temperature, the present invention proposes a filter plate, characterized in that: the filter plate comprises a filter plate body, a functional hole, a feed hole, a side main feed hole, a side feed channel, a filter cavity, and also includes a right joint, a fluid medium channel, and a left joint; the filter plate body is welded by metal materials, and the functional holes are arranged at the corners of the filter plate body and can be used as liquid outlet holes; there are more than one functional holes, which penetrate the thickness of the filter plate body; the feed hole is arranged on the filter plate body and is located at the same corner as the main side feed hole; the feed hole penetrates the thickness of the filter plate body and is connected with the side feed channel and the filter cavity on the side of the filter plate body; the side main feed hole is arranged at a corner of the filter plate body, penetrates the thickness of the filter plate body and is perpendicular to the end face of the filter plate body; when multiple filter plate bodies are superimposed together, the main side feed hole on each filter plate should be located at the same position on the filter plate body, and the side main feed holes of multiple filter plates constitute a main Feed channel; the side feed channel is arranged between the main side feed hole and the feed hole, and connects the main side feed hole and the feed hole; the seepage hole is arranged in the middle of the side surface of the filter plate body, penetrates the thickness between the filter cavities on the two side surfaces of the filter plate body, and in the filtering working state, the end of the seepage hole is covered with filter material; there are multiple seepage holes, which are evenly distributed inside the filter cavity; the filter cavity is arranged in the middle of both sides of the filter plate body, which is a recessed area; when the two filter plate bodies are fitted, the filter cavity between the filter plate bodies forms a cavity that can accommodate the filtered material; the right joint is installed at the left outlet of the fluid medium channel and is tightly connected to the fluid medium channel; the fluid medium channel is arranged inside the filter plate body, which is a metal pipe with good thermal conductivity or a hole or a closed groove, which is curved and covers more than 50% of the side area of ​​the filter plate body; the left joint is installed at the left outlet of the fluid medium channel and is tightly connected to the fluid medium channel.

[0013] In conjunction with the aforementioned cooling or heating device, when certain filtered materials need to be heated for filtration, the left joint and the right joint of the filter plate are respectively connected in series in the pipeline of the cooling or heating device. When heating is required, hot fluid medium is introduced, and when cooling is required, low-temperature fluid medium is introduced, thereby achieving heating or cooling of the filter plate.

[0014] In order to overcome the defect that liquid easily condenses on the flap at low temperature, causing the flap to be damaged due to excessive load-bearing, the present invention proposes a filter press flap, characterized in that it includes a flap shaft, a lower interface, a flap body, a flap fluid channel, an upper interface, an insulation layer, and a heat reflection layer; the flap shaft is arranged on the flap body and is located on one side of the flap body, and the shaft ends at both ends of the flap shaft are sleeved in the inner support ring of the flap support device and are sleeved and connected with the inner support ring of the flap support device; the lower interface is installed at one end of the flap fluid channel and is tightly connected with the flap fluid channel; the flap body is installed on the flap shaft and is fixedly connected to the flap shaft, and is a wing-shaped plate; the flap fluid channel The channel is installed on the flap body, fixedly connected to the flap body, and located on the back of the working surface of the flap body. The area through which the flap fluid channel passes can cover more than 50% of the area of ​​the flap body; the flap fluid channel is made of a metal tube with good thermal conductivity; the upper interface is installed at one end of the flap fluid channel, is tightly connected to the flap fluid channel, and is located at two different ends of the flap fluid channel with the lower interface respectively; the thermal insulation layer is installed on the flap body, is located on the back of the working surface of the flap body, is fixedly connected to the flap body, and is made of thermal insulation material; the heat reflecting layer is installed between the thermal insulation layer and the flap fluid channel, and is fixedly connected to the thermal insulation layer and the flap fluid channel respectively.

[0015] Since the flap area through which the flap fluid channel passes can cover more than 50% of the flap working area, the heating or cooling medium flowing through the flap fluid channel can heat or cool the flap body, thereby being able to adapt to the different temperature requirements of the filter medium.

[0016] Beneficial Effects

[0017] The beneficial effects of the present invention are that the adaptability of the filter press can be realized, the different temperature requirements of the filtered materials can be met, and energy can be fully utilized; the service life of the flap is increased, and the number of repairs and maintenance is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the appearance structure of the present invention

[0019] 1. Cooling or heating device, 2. Frame, 3. Feed port, 4. Thrust plate, 5. Filter plate group, 6. Beam, 7. Pressing plate, 8. Power cylinder, 9. Flap drive device, 10. Flap support device, 11. Flap.

[0020] Figure 2 This is an end view of the present invention

[0021] 2. Frame, 5. Filter plate group, 6. Beam, 10. Flap support device, 11. Flap.

[0022] Figure 3It is the principle diagram of the heating or cooling system in the present invention

[0023] 5. Filter plate group, 11. Flap plate, 12. Medium circulation device, 13. Pipeline.

[0024] Figure 4 This is the structural principle diagram of the flap support device in the present invention.

[0025] 10. flap support device, 11. flap, 101. support, 102. inner support ring, 103. outer support ring.

[0026] Figure 5 A side view of the flap support device

[0027] 11. flap, 101. support, 102. inner support ring, 103. outer support ring.

[0028] Figure 6 This is the structural diagram of the side feed filter plate in the filter plate

[0029] 51. Filter plate body, 52. Functional hole, 53. Feed hole in the prior art, 54. Feed hole, 55. Side main feed hole, 56. Side feed channel, 57. Seepage hole, 58. Filter cavity.

[0030] Figure 7 This is a schematic diagram of the structure after the feed filter plate and the non-feed filter plate are combined.

[0031] 51. Filter plate body, 56. Side feed channel, 511. Non-feed filter plate, 500. Filter cavity.

[0032] Figure 8 This is a schematic diagram of the structure of the filter plate with cooling or heating function.

[0033] 51. Filter plate body, 52. filtrate outlet hole, 55. side main feed hole, 59. right joint, 501. fluid medium channel, 502. seepage hole, 503. left joint.

[0034] Fig. 9 yes Figure 8 Side cross-sectional view

[0035] 51. filter plate body, 59. right joint, 501. fluid medium channel.

[0036] Fig.10 This is a schematic diagram of the structure of the flap

[0037] 111. Flap shaft, 112. Lower interface, 113. Flap body, 114. Flap fluid channel, 115. Upper interface.

[0038] Fig.11 This is a cross-sectional view of the flap

[0039] 111. flap shaft, 112. lower interface, 113. flap body, 114. flap fluid channel, 115. upper interface, 116. thermal insulation layer, 117. heat reflection layer. DETAILED DESCRIPTION

[0040] In order to further illustrate the technical solution of the present invention, the specific implementation mode of the present invention is described in conjunction with the accompanying drawings. Fig.10 , Fig.11 , in this example, the flap body of the liquid-connecting flap of the plate-and-frame filter press commonly used in this industry is adopted, and the flap shaft serves as the flap body 113 and the flap shaft 111 of this example respectively; and the flap shaft 111 is fixedly connected to the flap body 113 according to the common installation method in this industry, and the flap shaft 111 is located on one side of the flap body 113; in this example, a copper tube or an aluminum tube is selected as the material of the flap fluid channel 114, and the copper tube or the aluminum tube is coiled on the surface area of ​​the back of the working surface of the flap body 113, leaving interfaces at both ends to form a loop at the end of the flap body 113, and is fixedly connected to the flap body 113 by means of clips or spot welding; in this example, a quick-release fastener commonly used in this industry is selected The copper pipe joints are respectively used as the lower interface 112 and the upper interface 115, and they are respectively placed at the two ports of the flap fluid channel for connecting with the pipeline in the cooling or heating device 1 in the whole machine of the filter press. The lower interface 112 and the upper interface 115 can also be omitted by welding between the pipelines; the aluminum silicate fiberboard commonly used in the industry is selected as the thermal insulation layer 116, which is installed on the back of the working surface of the flap body 113, and aluminum foil is laid on the surface of the thermal insulation layer 116 close to the flap body 113 as the heat radiation layer 117, and the thermal insulation layer 116 and the heat radiation layer 117 are fixedly connected to the flap body 113, thereby completing the implementation of the flap 11.

[0041] In this example and the aforementioned directional terms, all point in the direction facing the view.

[0042] like Figure 6-9In this example, a rectangular filter plate commonly used in the industry is selected as an example, and the steel plates are welded to form the filter plate body 51 of this example, thereby overcoming the defects that the existing filter plate body 51 formed by casting is not easy to set the fluid medium channel 501, and it is difficult to process the feed hole; according to the common method in this industry, a frame and a filter cavity 58 are processed on the filter plate body 51; a side main feed hole 55 is set at the upper right corner of the filter plate body 51, and a feed channel 56 is made inside the side main feed hole 55, and the feed channel 56 is connected to the filter medium channel 501 at the feed channel 56. A feed hole 54 is set at the upper right corner of the filter chamber 58, and the feed channel 56 is ensured to be able to connect the side main feed hole 55 with the feed hole 54. The feed channel 56 can be welded after the hole of the part of the filter plate body 51 is processed, or the feed channel 56 can be processed by making a process hole on the side of the filter plate body 51. After the feed channel 56 is processed, the process hole is welded and sealed; three functional holes 52 are set at the upper left, lower left and lower right corners of the filter plate body 51. In this example, they are used as filtrate outlet holes 52 and are connected to the filter chamber 58; In this example, a recessed area is machined in the middle of both sides of the filter plate body 51, and the two side surfaces of the filter plate body 51 are used as filter chambers 58. A bypass groove is machined on the solid body of the filter plate body 51 between the two side filter chambers 58, and a copper pipe is buried in the groove as a fluid medium channel 501. Then, the surface of the groove is welded and filled, and a left joint 503 and a right joint 59 are flowed out on the upper side of the filter plate body 51 for connecting with the pipeline of the adding or cooling device 1; a plurality of seepage holes 502 or 503 are opened on the filter plate body 51 located in the filter chamber 58 area. Or seepage hole 57, and ensure that the seepage hole 57 or the seepage pore 502 penetrates the thickness of the filter plate body 51; as for the seepage pore 502 and the seepage hole 57, they are set separately or simultaneously according to the requirements of the filtered material to form a feed filter plate; a filter plate without a side feed channel 56 is selected as a non-feed filter plate 511, and a filter plate with a side feed channel 56 is selected as a feed filter plate, the feed filter plate and the non-feed filter plate 511 are stacked at intervals to form a filter cavity between the two filter plates, and multiple groups are combined to form a filter plate group 5.

[0043] like Figure 4-5In this example, a bearing seat with a mounting ear seat at the bottom commonly used in the industry is selected as the support 101, and quenched bearing steel is selected as the inner support ring 102 and the outer support ring 103; one or more threaded holes are opened on the outer circumferential surface of the upper part of the support 101, and two threaded holes are selected in this example, penetrating the wall thickness of the support shell, and the axis of the threaded hole is preferably consistent with the radial direction of the inner hole on the support 101; the outer diameter of the outer support ring 103 is set to be the same as the inner hole diameter of the support 101, and a threaded hole is set on the outer cylindrical surface at a position corresponding to the position of the threaded hole set on the support 101. A pit or hole is set, and the diameter of the pit or hole matches the diameter of the threaded hole; the inner hole of the outer support ring 103 is set to a spherical shape that is recessed into the wall thickness, the chord length of the cross-section of the spherical surface is equal to the length of the outer support ring 103, and the chord height is 0.3 mm. The inner spherical surface is formed by rotating around the axis of the inner hole of the outer support ring 103; in this example, the inner support ring 102 is selected to be annular, and the diameter of its inner hole is equal to the axial end diameter of the flap shaft of the flap 11. If the volume and weight of the flap 11 are large, a transmission keyway is set in the inner hole if necessary; the length of the inner support ring 102 is selected to be greater than or equal to the outer support The length of the support ring 103, the outer surface of the inner support ring 102 and the inner hole surface of the outer support ring 103 are convex outer spherical surfaces of the same shape and size; the inner support ring 102 is embedded in the outer support ring 103, the two spherical surfaces are tightly fitted, the outer support ring 103 is installed in the support 101, and the outer support ring 103 is fixed to the support 101 with a set screw, and the implementation of the flap support device 10 is completed. When used, since the inner support ring 102 is fixedly connected to the flap shaft, the inner support ring 102 rotates synchronously when the flap shaft rotates, and the inner support ring 10 2 rotates in the outer support ring 103, because there are two support devices at both ends of the flap shaft; the flap shaft will rotate normally in the two inner support rings 102. When the flap shaft is bent and deformed, the axis of the flap shaft becomes an arc, and the two inner support rings 102 at both ends change the axis direction with the flap shaft. Since the inner support ring 102 and the outer support ring 103 are in spherical contact, the axis deviation of the inner support ring 102 in the outer support ring 103 does not affect the smooth rotation of the inner support ring 102 in the outer support ring 103, so it will not cause wear of the support part and damage to the flap shaft.

[0044] like Figure 1-3In this example, the frame, beam, clamping plate, power cylinder, flap drive device, feed pump, thrust plate and control device of the plate and frame filter press commonly used in the industry are selected as the frame 2, thrust plate 4, beam 6, clamping plate 7, power cylinder 8, flap drive device 9, feed pump and control device respectively; and they are assembled and connected by the method commonly used in the industry; in this example, the mechanical equipment cooling system commonly used in the industry is selected as the medium circulation device 12, and the electric heating device commonly used in the industry is installed in the liquid storage tank, and the pipeline 13 is used to connect the medium circulation device 12 with the flap 11 and the filter plate group 5 in series, so as to heat the liquid medium in the liquid storage tank, and the liquid medium It can be water, oil or other coolants commonly used in the industry; the electrical control part of the medium circulation device 12 is connected to the control device of the plate and frame filter press to form a cooling or heating device 1; the flap 11 is installed on the frame 2 and connected to the frame 2 through the flap support device 10, one end of the flap shaft is connected to the flap drive device 10, and the flap 11 can rotate on the flap support device 10; the filter plate group 5 is installed on the beam 6, and connected to the feed port through a pipeline, and then connected to the feed pump; the single filter plate of the filter plate group 5 is connected to the filter plate opening and closing device, and the filter plate opening and closing device here is the power cylinder 8 and its accessories; this completes the implementation of the present invention.

[0045] During application, if the filtered medium needs to work at a certain temperature, start the electric heating device in the cooling or heating device 1 to heat the liquid medium, start the circulation pump in the medium circulation device 12, and let the heated liquid medium enter the flap 11 and the filter plate group 5 from the liquid storage tank through the pipeline, heat the filter plates in the filter plate group 5 and the flap body 111 of the flap 11, so that the filtered material is transported to the filter plate group 5 through the feed pump. Due to the use of side dispersed feeding, the situation in the prior art where concentrated feeding from the middle causes damage to the front filter plate is avoided. Under the action of the power cylinder 8, the pressing plate 7 presses the filter plate group 5 against the thrust plate 4, and filtering is performed under pressure. Since the filter plate group 5 is at high When working under pressure, it generates a lot of heat, and sometimes it needs to dissipate heat. At this time, the electric heating device in the liquid storage tank of the medium circulation device 12 is stopped, and cooling liquid is introduced into the filter plate group 5. The cooling liquid is heated by the filter plate group 5 with high temperature after passing through the filter plate group 5, and then enters the flap 11 to heat the flap 11. At this time, there is no need to heat the liquid medium separately, which plays a role in energy recovery and utilization. After the filtration is completed, the power cylinder 8 moves in the opposite direction to pull the filter plate group 5 apart, and the filter plates of the filter plate group 5 are separated. At this time, the flap 11 flips over to vacate the middle slag falling position, and the filter residue falls from between the filter plates to the slag falling position. The feeding action is repeated to form the working process of the plate and frame filter press.

Claims

1. A plate and frame filter press, characterized in that: It includes a cooling or heating device, a frame, a feed port, a thrust plate, a filter plate group, a beam, a clamping plate, a power cylinder, a flap driving device, a flap supporting device, and a flap; the cooling or heating device is installed near the frame, and includes a medium circulation device and a pipeline; the medium circulation device includes a driving motor, a circulation pump, and a medium storage device; the driving motor is installed near the medium storage device, and its power output shaft is connected to the power input shaft of the circulation pump, and can drive the circulation pump to operate; the circuit part of the driving motor is connected to the control system of the plate and frame filter press; the circulation pump is installed near the medium storage device, and the inlet of the circulation pump is connected to the inner cavity of the medium storage device and immersed in the heating or cooling medium, and the outlet of the circulation pump is connected to the inner cavity of the medium storage device. The interface at one end of the pipeline is sealed and connected, and can output heating or cooling medium into the pipeline; the medium storage device is installed near the frame, or connected to the frame, and includes a liquid storage tank, a liquid outlet, a liquid inlet, and a heating device; the liquid storage tank is a closed cavity with an opening, and its inner cavity contains liquid medium; the liquid outlet is sealed and connected to the inlet of the circulation pump; the liquid inlet is connected to one end of the pipeline; the heating device is installed in the liquid storage tank, and can heat the liquid medium in the liquid storage tank; the pipeline is installed on the medium circulation device, and is respectively connected to the medium circulation channels on the flap and the filter plate group and then returns to the medium circulation device to form a loop; the frame is installed on the base, and can support the beam, the power cylinder, accessories and control components; The feed port is arranged at the end of the thrust plate and is connected to the filtered material supply pump through a pipeline; the thrust plate is installed on the frame and is fixedly connected to the frame; the filter plate group is installed on the beam and is floatingly mounted on the beam; the filter plate group is composed of a plurality of filter plates, each filter plate fits each other, and there is a filter cavity between two filter plates; the beam is installed on the frame and is fixedly connected to the frame; the pressure plate is sleeved on the beam and can slide on and along the beam, and its end face area matches the end face area of ​​the filter plate; the power cylinder is installed on the frame and is located at one end of the beam and is fixedly connected to the frame, and the end of its piston rod is connected to the pressure plate and can push the pressure plate to make a linear motion; the flap drive device is installed on the frame and is connected to the frame The fixed connection includes a driving element and a transmission device; the driving element is installed on the frame and is fixedly connected to the frame, and the power output part is connected to the transmission device; one end of the transmission device is connected to the driving element, and the other end is connected to the transmission wheel at the end of the flap shaft; the flap support device is installed on the frame and is fixedly connected to the frame; the flap support device is located at both ends of each flap shaft, and can support the flap and realize the rotation of the flap along the flap shaft; the flap is installed on the flap support device through the flap shaft on one side of the flap, and is connected to the flap support device in a sleeve, and can rotate in the flap support device, wherein the flap shaft end located at the same end of the flap drive device is installed with a transmission wheel, which can realize the rotation of the flap shaft under the drive of the flap drive device;The filter plate group is composed of a feed filter plate and a non-feed filter plate. The filter plate without a side feed channel is a non-feed filter plate, and the filter plate with a side feed channel is a feed filter plate. The feed filter plate and the non-feed filter plate are stacked at intervals. The flap support device includes a mounting support, an inner sliding ring, and an outer sliding ring. The mounting support is arranged on the periphery of the outer sliding ring, and a fixed mounting structure connected to the frame is arranged on the outer periphery. This fixed mounting structure is a step or a protrusion with a bolt hole. The mounting support is provided with an outer sliding ring mounting hole, and its diameter matches the outer diameter of the outer sliding ring. , and the outer slip ring can be fastened in this mounting hole; the outer slip ring is installed in the mounting hole on the mounting support, and is annular. Its outer ring matches the outer slip ring mounting hole on the mounting support and can be fixedly connected. Its inner hole is a spherical hole, and its spherical radius is the same as the spherical surface radius on the outer diameter of the inner slip ring; the inner slip ring is installed in the inner hole of the outer slip ring, and is annular. Its inner hole is a cylindrical hole, which matches the end of the flap shaft and can be fixedly connected with the flap shaft; the outer surface of the inner slip ring is a spherical surface protruding outward, and the radius of the spherical surface matches and fits with the spherical surface of the inner hole of the outer slip ring. ; 2. A plate and frame filter press according to claim 1, characterized in that: The height between the inner hole of the outer sliding ring and the outer spherical surface of the inner sliding ring is not greater than 0.5 mm, so that the inner sliding ring is easily installed in the outer sliding ring.

3. A plate and frame filter press according to claim 1, characterized in that: The inner sliding ring and the outer sliding ring are both made of wear-resistant materials.

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