Residue filtering device for litchi puree treatment

Abstract

The invention relates to the technical field of litchi puree preparation equipment, and discloses a residue filtering device for litchi puree treatment, which comprises a rack and filter cloth, the filter cloth and the rack which are circularly stacked in an S shape form a plurality of pulp filtering cavities and filtrate cavities, and the pulp filtering cavities and the filtrate cavities are alternately stacked; an extrusion part is arranged in the filtrate cavity and comprises a lower pressing plate and an upper pressing plate, the upper pressing plate and the lower pressing plate can be relatively close to each other or far away from each other through a spring assembly, so that the upper pressing plate and the lower pressing plate can extrude the pulp filtering cavity when moving in the filtrate cavity, and the extrusion part is connected with a filtrate channel; the contact area of the extrusion part and the filtrate cavity is smaller than the area of the filtrate cavity, and a blocking plate is arranged on one side of the rack and used for sealing an opening of the pulp filtering cavity; the industrial litchi raw stock filtering device has the advantages that the influence of blockage of the filtering holes on the filtering efficiency can be reduced, and the filtering efficiency of industrial litchi raw stock is improved.

Description

Technical Field

[0001] The invention relates to the technical field of litchi pulp preparation equipment, in particular to a residue filtering device for litchi pulp processing. Background Art

[0002] Lychee puree is a natural fruit pulp. When making lychee puree, fresh lychees are peeled, cored and washed, then put into a pulper or blender to evenly crush the pulp to obtain preliminary lychee puree. At this time, the lychee puree contains a large amount of pulp impurities, etc. It needs to be filtered to obtain clear and delicate lychee puree. The filtered lychee puree is then sterilized and can be cooled, filled and stored.

[0003] Unlike other fruit pulps (such as oranges, apples, etc.) that contain coarser fibers or more pomace, lychee pulp has finer fibers and contains more fructose and pectin, which makes the lychee pulp more viscous after pulping. In addition, lychee pulp is juicier and contains a small amount of tiny seeds, and its residue is finer and more diverse, making it easier to clog the filter holes during filtration, affecting the filtration efficiency. When extracting lychee juice, it is necessary to use a fine filter mesh or filter cloth to ensure that the residue is effectively removed, further exacerbating the possibility of clogging the filter holes.

[0004] In summary, there is an urgent need for a filter residue device for treating litchi pulp that can reduce the impact of filter pore blockage on filtration efficiency and improve the filtration efficiency of industrial litchi pulp. Summary of the invention

[0005] In view of the problem of inefficient filtration of litchi pulp residue in the prior art, a litchi pulp residue processing device is proposed, which can reduce the influence of filter pore blockage on filtration efficiency and improve the filtration efficiency of industrial litchi pulp.

[0006] In order to solve the above problems, the technical solution of the present invention is: A filter residue device for processing litchi pulp comprises: a frame, a filter cloth, wherein the filter cloth and the side plates of the frame are stacked in an S-shaped cycle to form a plurality of filter pulp chambers and filtrate chambers, wherein the filter pulp chambers and the filtrate chambers are alternately distributed up and down; an extrusion piece is provided in the filtrate chamber, wherein the extrusion piece can move in the filtrate chamber and is used to compress the filter pulp chamber, wherein the extrusion piece is connected to a filtrate channel, wherein in the direction in which the extrusion piece moves along the filtrate chamber, the length of the extrusion piece is less than the length of the filtrate chamber; a sealing plate is provided on one side of the frame, wherein the sealing plate is used to close the opening of the filter pulp chamber; a grouting pipe leading to the filter pulp chamber is provided on the frame.

[0007] As a preferred technical solution, negative pressure suction is provided through the filtrate channel during the filtration stage; and flushing is provided through the filtrate channel during the cleaning stage.

[0008] As a preferred technical solution, the filter cloth can move within the frame.

[0009] As a preferred technical solution, the extrusion member includes a lower pressing plate and an upper pressing plate, and the upper pressing plate and the lower pressing plate can be relatively close to or far away from each other.

[0010] As a preferred technical solution, the upper pressing plate and the lower pressing plate are connected via a plurality of spring assemblies.

[0011] As a preferred technical solution, a filter slot hole is provided on the lower pressure plate.

[0012] As a preferred technical solution, the end of each filter slot hole is supported by two groups of supporting shaft rods, and there is a distance between the two groups of supporting shaft rods.

[0013] As a preferred technical solution, the end of each of the slurry filtering chambers is supported by a movable shaft rod, and the movable shaft rod can be extended and retracted along the moving direction of the extrusion member.

[0014] As a preferred technical solution, the filter cloth is provided with a retracted end and a released end.

[0015] As a preferred technical solution, the filter tank hole is arranged in a filtrate recovery chamber, and the filtrate recovery chamber is connected to the filtrate channel.

[0016] Beneficial effects of the present invention: 1. The filter residue device for processing litchi pulp of the present invention comprises a frame and a filter cloth, wherein the filter cloth forms alternately stacked filter pulp chambers and filtrate chambers in the frame, and an extrusion piece is arranged in the filtrate chamber, and the extrusion pieces in the two filtrate chambers jointly squeeze the filter pulp chambers in the two filtrate chambers to realize the filter pressing of the filter pulp chamber; and the contact area between the extrusion piece and the filtrate chamber is smaller than the area of ​​the filtrate chamber, so that when the extrusion piece squeezes the filter pulp chamber, the liquid filtered by the filter cloth can flow down along the edge of the extrusion piece or the notch on the extrusion piece, thereby improving the utilization efficiency of the filter cloth of the vertical filter press.

[0017] 2. The filtrate channel of the filter residue device for processing litchi pulp of the present invention is connected to negative pressure suction, which can extract the filtrate filtered into the filtrate cavity from the upper and lower filter pulp cavities, thereby improving the filtering efficiency of the filtrate in the filter pulp cavity.

[0018] 3. The retracted end and the released end of the filter residue device for processing litchi pulp of the present invention can displace the filter cloth in the frame. When the filter cloth is displaced, the filter residue in the filter pulp cavity can be taken out. During the displacement of the filter cloth, the filter cloth can be backwashed by introducing high-pressure gas into the filtrate channel. Each filtrate cavity is provided with the extrusion member and the filtrate channel, which greatly reduces the moving distance of the filter cloth in the cleaning stage, thereby shortening the interval time of the filter press. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a three-dimensional schematic diagram of a residue filtering device for treating litchi pulp according to the present invention; Attached Figure 2 A schematic diagram of the filter layout of a filter residue device for treating litchi pulp according to the present invention; Attached Figure 3 This is a schematic diagram of the separation of the blocking plate and the filter pulp chamber of a filter residue device for treating litchi pulp according to the present invention; Attached Figure 4 It is a schematic diagram of an extrusion piece of a filter residue device for treating litchi pulp according to the present invention; Attached Figure 5 It is a partial cutaway schematic diagram of a frame of a filter residue device for treating litchi pulp according to the present invention; Attached Figure 6 The invention discloses a partial cutaway schematic diagram of a filter cloth and an extrusion piece in a filter residue device for processing litchi pulp.

[0020] The reference numerals and components involved in the drawings are as follows: 1. Frame; 2. Filter cloth; 3. Filter pulp chamber; 4. Filtrate chamber; 5. Extrusion piece; 6. Release end; 7. Reeling end; 11. Side plate; 12. Movable shaft rod; 13. Support shaft rod; 14. Sealing plate; 51. Upper pressure plate; 52. Lower pressure plate; 53. Filtrate channel; 54. Spring assembly; 111. Grouting pipe; 121. Mounting plate; 122. Moving plate; 521. Filter tank hole; 522. Filtrate recovery chamber. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In order to better understand the filter residue device for processing litchi pulp provided in this embodiment, the existing filtering device is briefly introduced below. In industrial production, due to the high efficiency of filter pressing, it is suitable for mass production, so a vertical filter press is used to filter litchi pulp. During filtration, the pulp on the filter cloth is pressurized, solid impurities are left on the filter cloth, and liquid pulp flows out through the filter cloth. Specifically, the vertical filter press is a machine used for litchi filter pressing. The machine usually includes a frame, a clamping device, a plate and frame assembly, a high-pressure water station, a feed pump, a hydraulic station, a control cabinet, etc. For filtering to obtain filtrate, its working principle usually includes the following stages: Filtration stage: When each filter plate frame of the plate frame group is closed, the slurry enters each filter cavity through the slurry pipe at the same time. The filtrate passes through the filter cloth into the filtrate cavity, then into the filtrate hose, and finally reaches the filtrate main pipe for discharge; Filter cake extrusion: High-pressure water enters the upper cavity of the diaphragm in the filter plate frame through the high-pressure water hose, causing the diaphragm to be squeezed toward the surface of the filter cake, thereby squeezing the filtrate out of the filter cake; Filter cake discharge: When the drying process is completed, the plate and frame assembly opens, the filter cloth drive mechanism starts to operate, and the filter cake on the filter cloth is discharged from both sides of the filter press; Filter cloth cleaning: An integrated cleaning device is installed on the filter cloth circulation path, which can use high-pressure gas or high-pressure water to wash the filter cloth surface; However, it is obvious that when separating materials such as litchi pulp that are easy to clog the filter cloth filter holes, in order not to affect subsequent filtration, the filter cloth needs to be cleaned before the next round of filtration, and the existing vertical filter press plate has a cleaning device that is independent of the plate frame group. After one filtration, it is necessary to wait until the filter cloth involved in the filtration is completely passed through the cleaning device or the filter cloth of the top filter plate frame is separated from the bottom filter plate frame before a new round of filler filtration can be carried out, and the slurry in each layer of the filter plate frame can only be filtered through the filter cloth on the lower surface, and the upper surface of the filter plate frame needs to be used for the extrusion of the filter cake, and the filtrate must flow out from the top to the bottom, so that when the filter hole is blocked, it is necessary to extend the filter pressing waiting time to improve the filtration effect, or reduce the amount of pulp filtered in a single time, which undoubtedly greatly limits the filtration efficiency of litchi pulp. In order to solve the above problems, the present invention provides a filter residue device for litchi pulp processing, which is intended to improve the utilization rate of the space between the filter cloths, reduce the interval time between cleaning the filter cloths and filtering them, and improve the filtration efficiency of litchi pulp. Specifically, as follows: Please see attached Figure 1 , Figure 1 The present invention is a three-dimensional schematic diagram of a filter residue device for processing litchi pulp; a filter residue device for processing litchi pulp comprises a frame 1 and a filter cloth 2; the frame 1 is used to support the filter cloth 2, and together with the filter cloth 2, forms a filter pulp chamber 3 for accommodating the raw pulp before filtration and a filtrate chamber 4 for receiving the filtrate after filtration by the filter cloth 2; the frame 1 is also provided with a corresponding driving member for driving the operation of the filter residue device for processing litchi pulp of the present invention, specifically: Please attach Figure 2 , Figure 2The present invention is a schematic diagram of the filter cloth structure of a filter residue device for processing litchi pulp; the frame 1 includes two side plates 11, one end of the two side plates 11 is provided with a support shaft 13, and each two support shafts 13 form a group, and the other end of the two side plates 11 is provided with a movable shaft 12, wherein the movable shaft 12 is arranged on the opposite side of the two groups of support shafts 13 and is located between the two groups of movable shafts 12, so that the filter cloth 2 can pass through the movable shaft 12 and the support shaft 13 in sequence to achieve S-shaped winding, and the side edge of the filter cloth 2 is in contact with the side plate 11, wherein the filter cloth 2 is wrapped around the movable shaft 12 and the support shaft 13. The filter cloth 2 on the driving shaft 12 and the two side plates 11 constitute the filter pulp chamber 3, and the filter cloth 2 and the two side plates 11 surrounding the supporting shaft 13 constitute the filtrate chamber 4; a grouting pipe 111 is provided on the side plate 11 constituting the filter pulp chamber 3, and the slurry to be filtered can be injected into the filter pulp chamber 3 through the grouting pipe 111; in order to allow the slurry to stay in the filter pulp chamber 3 for filtration, a blocking plate 14 controlled by a telescopic pump is provided on one side of the frame 1, and the blocking plate 14 corresponds to the opening of the filter pulp chamber 3, and its blocking and opening are controlled by the telescopic pump. Please refer to the attached Figure 3 , attached Figure 3 The present invention is a schematic diagram of a filter residue device for processing litchi pulp, in which a blocking plate and a filter pulp chamber are separated.

[0023] In the process of filtering the litchi pulp, since the filter holes of the filter cloth 2 are relatively fine and the viscosity of the litchi pulp is relatively high, the efficiency of static filtration is extremely low. In the filter residue device for treating litchi pulp of the present invention, each of the filter pulp chambers 3 is adjacent to the filtrate chamber 4 in the upper and lower parts, and an extrusion member 5 is provided in the filtrate chamber 4. See the attached drawing. Figure 4 , Attachment Figure 5 , attached Figure 4 The present invention is a filter residue device for processing litchi pulp and its extrusion parts schematic diagram, attached Figure 5 The present invention is a partial cross-sectional schematic diagram of a filter residue device for processing litchi pulp and its frame; the frame 1 is provided with guide grooves on both sides of the filtrate chamber 4 on its side plates 11, which are used to engage the extrusion member 5, and the extrusion member 5 can slide in the filtrate chamber 4 along the guide grooves; the extrusion member 5 includes an upper pressing plate 51 and a lower pressing plate 52, the upper pressing plate 51 corresponds to the lower filter cloth 2 of the upper filter pulp chamber 3, and the lower pressing plate 52 corresponds to the upper filter cloth 2 of the lower filter pulp chamber 3. In this embodiment, the lower pressing plate 52 is only along the guide grooves. The guide groove moves, and the upper pressure plate 51 is connected to the lower pressure plate 52 through a spring assembly 54. It can not only move horizontally along the guide groove in the filtrate chamber 4, but also move up and down perpendicular to the guide groove under the action of the spring assembly 54. During the filtration stage, the distance between the upper pressure plate 51 and the lower pressure plate 52 of another extrusion piece 5 above is reduced, providing pressurized filtration for the litchi puree; the extrusion piece 5 realizes the back and forth movement of the extrusion piece 5 in the guide groove by arranging a threaded screw driven by a motor on the frame 1.

[0024] Since the filtrate chamber 4 and the filter pulp chamber 3 are alternately stacked, in order to prevent the filtrate in the filtrate chamber 4 from flowing into the filter pulp chamber 3 below, a filtrate channel 53 is provided on one side of the extrusion member 5, and one end of the filtrate channel 53 is connected to a suction pump, and the filtrate filtered through the filter pulp chamber 3 is extracted from between the upper pressure plate 51 and the lower pressure plate 52 by the suction force provided by the suction pump; and when the filtration is completed, the filtrate channel 53 is connected to the high-pressure gas pump, and gas is introduced into the filtrate chamber 4 to form backwash cleaning.

[0025] In order to better utilize the filtering effect of the upper and lower layers of filter cloth 2 in the filter pulp chamber 3, a filter slot hole 521 is provided on the lower pressure plate 52, and no opening is provided at the position of the upper pressure plate 51 opposite to the filter slot hole 521. Under the action of the extrusion force, the filter cloth 2 and the filter pulp corresponding to the filter slot hole 521 protrude from the filter slot hole 521, so that the filtrate penetrating from the filter cloth 2 can be adsorbed and collected again during the subsequent movement process; in some preferred embodiments, the lower pressure plate 52 can also move downward.

[0026] Please see attached Figure 6 , attached Figure 6 The present invention is a partial cross-sectional schematic diagram of a filter residue device for processing litchi pulp, wherein the filter cloth and the extrusion piece cooperate; during the extrusion process of the extrusion piece 5 on the filter pulp chamber 3, due to the deformation of the filter cloth 2 in the filter pulp chamber 3, the filter cloth 2 will be displaced to a certain extent. In order to further prevent excessive pulling on the filter cloth 2, the movable shaft rod 12 covered by the filter pulp chamber 3 includes a mounting plate 121, and a movable plate 122 connected to the mounting plate 121 through a spring column, and the movable plate 122 is connected to a rotatable shaft rod, so that when the filter cloth 2 of the filter pulp chamber 3 is deformed, the movable shaft rod 12 can be pulled to displace, thereby avoiding pulling on the filter cloth 2.

[0027] Since litchi pulp can easily clog the filter holes of the filter cloth 2, the filter cloth 2 needs to be cleaned after each filtration and before the next filtration. When the extruder 5 is located at the end of the filtrate chamber 4, the filter cloth 2 can be backwashed through the filtrate channel 53. It should be understood that the initial end of the filtrate chamber 4 is the opening of the filtrate chamber 4. In this embodiment, a reeling end 7 is provided at the lower end of the frame 1, and a release end 6 is provided at the upper end of the frame 1. The movement of the filter cloth 2 is achieved by reeling in the reeling end 7 and releasing the release end 6. The movement of the filter cloth 2 can drive the filter residue out of the filter pulp chamber 3. Preferably, in some embodiments, the release end 6 is combined with the reeling end 7 and is only used to drive the movement of the filter cloth 2, and the filter cloth 2 is connected head to tail to achieve recycling.

[0028] The use of the present invention is as follows: in the initial state, the filter pulp chamber 3 and the filtrate chamber 4 are in a hollow state, the extrusion member 5 is located at the initial end of the filtrate chamber 4, and the upper pressing plate 51 is located below the mounting plate 121 of the movable shaft rod 12. Under the limit of the mounting plate 121, the upper pressing plate 51 is in a compressed limit state, and the filter pulp chamber 3 is kept in a closed state. The plugging plate 14 is controlled by the telescopic pump to plug the opening of the filter pulp chamber 3. It should be understood that the The plugging plate 14 cooperates with the supporting shaft 13 to well plug the filter pulp chamber 3; then the litchi pulp is injected into the filter pulp chamber 3 through the grouting pipe 111. When the filter pulp chamber 3 is filled, the filtration stage is entered, and the filtrate flows into the filtrate chamber 4 below. The motor is started to make the extrusion member 5 move with the filtrate channel 53 to the end of the filtrate chamber 4. When the upper pressure plate 51 is separated from the mounting plate 121, it moves upward under the elastic force of the spring assembly 54 to squeeze the lower layer of the upper filter pulp chamber 3. The filter cloth 2, in this embodiment, the lower pressing plate 52 cannot move up and down, so the distance between the upper pressing plate 51 of one extrusion member 5 and the lower pressing plate 52 of another extrusion member 5 above is reduced, the litchi pulp in the filter pulp chamber 3 is squeezed, and further, the filtrate is squeezed into the filtrate chamber 4. It should be understood that the filtrate filtered out by the lower filter cloth 2 of the filter pulp chamber 3 flows along the edge of the upper pressing plate 51 into the filtrate channel 53 between the upper pressing plate 51 and the lower pressing plate 52, and flows out from the filtrate channel 53. is extracted; further, the upper and lower filter cloths 2 of the filter pulp chamber 3 can both exude filtrate under the extrusion of the extruder 5, and the filtrate exuded from the upper filter cloth 2 is sucked into the filtrate channel 53 along the lower pressing plate 52. In this embodiment, the lower pressing plate 52 is provided with a filter slot hole 521, which can be scraped twice, and preferably, the filter slot hole 521 has an independent filtrate recovery chamber 522 for suction, which can prevent the filtrate sucked back from the end of the lower pressing plate 52 from flowing into the filter slot hole 521, thereby reducing the filtrate collection efficiency;After the filtration is completed, the filtrate in the filtrate channel 53 is completely sucked out. At this time, high-pressure gas is rushed into the filtrate chamber 4 through the filtrate channel 53. Since the extruder 5 is located at the end of the filtrate chamber 4, first, the gas entering through the filtrate channel 53 passes through the space between the upper pressing plate 51 and the lower pressing plate 52, the filter slot hole 521 of the lower pressing plate 52 and the top of the upper pressing plate 51, wherein the space between the upper pressing plate 51 and the lower pressing plate 52 is directly opposite to the filter cloth 2 mounted on the support shaft 13 connected to the filtrate chamber 4, the filter slot hole 521 of the lower pressing plate 52 corresponds to the upper filter cloth 2 of the filter pulp chamber 3 below, and the gap between the upper pressing plate 51 and the filtrate channel 53 corresponds to the lower filter cloth 2 of the filter pulp chamber 3 above, that is, through the filtrate channel 53 can flush the three sides of the filter cloth 2 at the end of the filter pulp chamber 3. In the cleaning stage, it should be understood that the unloading and cleaning are carried out simultaneously. First, the blocking plate 14 is separated from the filter pulp chamber 3. Under the movement of the filter cloth 2, the filter residue in the filter pulp chamber 3 is separated from the filter cloth 2 from the opening. It should be noted that the filtrate channel 53 backwashes the three sides of the filter residue outlet, so that the filter residue can be smoothly separated from the filter cloth 2, and at the same time, the blocked filter holes are unblocked; when the distance pulled by the filter cloth 2 is the distance from the support shaft 13 to the movable shaft 12, the next round of filtration can be carried out. Preferably, in order to make the upper and lower layers of the filter cloth 2 of the previous round of the filter pulp chamber 3 pass through the front cleaning of the filtrate channel 53, its moving distance should be the overall length of the two layers of the filter cloth 2 in the filter pulp chamber 3. ;

[0029] It should be noted that the filter residue device for processing litchi pulp of the present invention comprises a frame 1 and a filter cloth 2, wherein the filter cloth 2 forms alternately stacked filter pulp chambers 3 and filtrate chambers 4 in the frame 1, and an extrusion piece 5 is provided in the filtrate chamber 4, and the extrusion pieces 5 in the two filtrate chambers 4 jointly squeeze the filter pulp chambers 3 in the two filtrate chambers 4 to achieve pressure filtration of the filter pulp chambers 3; and the contact area between the extrusion piece 5 and the filtrate chamber 4 is smaller than the area of ​​the filtrate chamber 4, so that the extrusion piece 5 has a good contact with the filter pulp. When the cavity 3 is squeezed, the liquid filtered by the filter cloth 2 can flow down along the edge of the extrusion piece 5 or the notch on the extrusion piece 5, thereby improving the utilization efficiency of the filter cloth 2 of the vertical filter press; its filtrate channel 53 is connected to the negative pressure suction, which can extract the filtrate filtered from the upper and lower filter slurry cavities 3 to the filtrate cavity 4, thereby improving the filtration efficiency of the filtrate in the filter slurry cavity 3; its retracted end 7 and release end 6 can cause the filter cloth 2 in the frame 1 to move, and when the filter cloth 2 moves, it can bring out the liquid in the filter slurry cavity 3 The filter residue inside, and during the displacement of the filter cloth 2, high-pressure gas is introduced into the filtrate channel 53 to realize the backwashing of the filter cloth 2, and each filtrate chamber 4 is provided with the extrusion member 5 and the filtrate channel 53, which greatly reduces the moving distance of the filter cloth 2 during the cleaning stage, thereby shortening the interval time of the filter press; the filter slot hole 521 is arranged in the filtrate recovery chamber 522, and the filtrate recovery chamber 522 is connected with the filtrate channel 53, so that the filter slot hole 521 does not interfere with the airflow between the upper pressure plate 51 and the lower pressure plate 52. It should be understood that in the filtration stage, the suction force of the filtrate channel 53 on the filter slot hole 521 causes the gas to enter the filter pulp chamber 3 from the forward direction of the extrusion member 5 and flow to the filter slot hole 521, so that in the forward direction of the extrusion member 5, the filter holes on the filter cloth 2 of the filter pulp chamber 3 are first dredged by the passing airflow, preventing the filter holes from being blocked in large quantities before the extrusion filtration, and further improving the efficiency of the extrusion filtration.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the principle of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A filter residue device for processing litchi pulp, characterized in that: include: A frame, a filter cloth, the filter cloth stacked in an S-shaped cycle and the side plates of the frame form a plurality of filter slurry chambers and filtrate chambers, wherein the filter slurry chambers and the filtrate chambers are alternately distributed up and down; an extrusion piece is provided in the filtrate chamber, the extrusion piece can move in the filtrate chamber and is used to compress the filter slurry chamber, the extrusion piece is connected to the filtrate channel, wherein in the direction in which the extrusion piece moves along the filtrate chamber, the length of the extrusion piece is less than the length of the filtrate chamber; a sealing plate is provided on one side of the frame, the sealing plate is used to close the opening of the filter slurry chamber; a grouting pipe leading to the filter slurry chamber is provided on the frame.

2. The filter residue device for treating litchi pulp according to claim 1, characterized in that: In the filtration stage, negative pressure suction is provided through the filtrate channel; in the cleaning stage, flushing is provided through the filtrate channel.

3. The filter residue device for treating litchi pulp according to claim 1, characterized in that: The filter cloth is movable in the frame.

4. The filter residue device for treating litchi pulp according to claim 1, characterized in that: The extrusion member comprises a lower pressing plate and an upper pressing plate, and the upper pressing plate and the lower pressing plate can be relatively close to or far away from each other.

5. The filter residue device for treating litchi pulp according to claim 4, characterized in that: The upper pressing plate and the lower pressing plate are connected via a plurality of spring assemblies.

6. The filter residue device for treating litchi pulp according to claim 4, characterized in that: The lower pressing plate is provided with a filter slot hole.

7. The filter residue device for treating litchi pulp according to claim 6, characterized in that: The end of each filter slot hole is supported by two groups of supporting shaft rods, and there is a distance between the two groups of supporting shaft rods.

8. The filter residue device for treating litchi pulp according to claim 1, characterized in that: The end of each of the pulp filtering chambers is supported by a movable shaft rod, and the movable shaft rod can be extended and retracted along the moving direction of the extruding member.

9. The filter residue device for treating litchi pulp according to claim 1, characterized in that: The filter cloth is provided with a reeling end and a releasing end.

10. The filter residue device for treating litchi pulp according to claim 6, characterized in that: The filter slot hole is arranged in the filtrate recovery chamber, and the filtrate recovery chamber is communicated with the filtrate channel.

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