A device and method for removing residue from raw oil for carbon black production

Abstract

The present invention relates to the technical field of oil filtration, and specifically discloses a device and method for removing slag from crude oil for carbon black production, comprising: a support component, a filter cloth, an adjustment component and a driving source, wherein the support component is arranged in a circular array along the axis of a storage chamber, the filter cloth is annular, the adjustment component is arranged at both ends of the support component, the adjustment component is rotatably connected to the storage chamber, the adjustment component and the filter cloth are combined to form a filter chamber, and the filter chamber rotates around the axis of the storage chamber; the device and method for removing slag from crude oil for carbon black production of the present invention can keep the oil in good fluidity during filtration, increase the pressure in the filter chamber when cleaning the filter cloth, and discharge the oil in the filter chamber quickly, so as to reduce the number of times and the time required for cleaning the filter screen.

Description

Technical Field

[0001] The invention relates to the technical field of oil filtration, and in particular to a device and method for removing residues from raw oil used in carbon black production. Background Art

[0002] The main raw materials used in carbon black production include raw oils such as coal tar and ethylene tar. Among them, coal tar is a by-product of coking, accounting for more than 80% of the raw oil, and is the most important raw oil. Before processing, coal tar needs to be separated by gravity sedimentation. With the continuous expansion of the tar system, the demand for raw tar increases. Because the tar itself carries a large amount of coke residue, oil residue precipitation forms at the bottom of the raw material storage tank, which easily causes pipeline blockage. After entering the process system, the oil residue absorbs heat but does not generate heat, affecting the generation of light fractions and also affecting the measurement of instruments. Cleaning the oil residue requires manpower and material resources, increasing investment costs and reducing the economic benefits of the enterprise.

[0003] A Chinese patent application document with application publication number CN117018731A discloses an oil residue separation device and separation method for coal tar recovery. The device includes a filter, an inlet pipe is provided at the top of the filter, an oil phase discharge pipe is provided at the bottom of the filter, and a filter barrel is provided inside the filter; multiple groups of heat flow heating components are provided on the outside of the filter barrel, and a heat source frame is connected to a heat flow source, which provides heat flow to the heat source frame and sprays it to the outer wall of the filter barrel through a nozzle.

[0004] In the prior art, when filtering coal tar, since coal tar itself is viscous and has worse fluidity at low temperatures, the filter is easily clogged during coal tar filtration, resulting in frequent shutdowns to clean the filter, which will cause large temperature changes in the coal tar and affect the filtration efficiency. Summary of the invention

[0005] The present invention provides a device and method for removing slag from raw oil for carbon black production, aiming to solve the technical problem in the related art that coal tar itself is viscous and has worse fluidity at low temperatures, and the filter screen is easily clogged during coal tar filtering, resulting in frequent shutdowns for cleaning the filter screen, resulting in large temperature changes in the coal tar and affecting the filtration efficiency.

[0006] The present invention discloses a raw oil deslagging device for carbon black production, comprising a base, a storage chamber installed on the base along the front-back direction, an outlet being provided at the lower end of the storage chamber, and comprising: a support assembly, the support assembly comprising a plurality of clamping rod groups 1 and 2, all of which are arranged in a circular array along the axis of the storage chamber, the clamping rod groups 1 and 2 are arranged at intervals, and the clamping rod groups 1 and 2 are provided with gaps a along their length direction, a filter cloth, one end of which passes through all the gaps a in sequence to form a ring, and an adjustment assembly comprising a plurality of telescopic driving components. A source and two end plates, the two end plates are respectively arranged at the front and rear ends of the filter cloth and are rotatably connected to the storage chamber, a filter chamber is formed between the filter cloth and the two end plates, an inlet is opened on the front end plate, the inlet is connected to the hot air duct, a plurality of telescopic driving sources are divided into two groups and are respectively installed on the two end plates, a plurality of clamping rod groups 1 and clamping rod groups 2 are respectively connected to the telescopic ends of the plurality of telescopic driving sources, and are used to control the clamping rod group 1 and clamping rod group 2 to slide radially along the end plates, a driving source 1 is arranged on the storage chamber, and is used to rotate the end plates around the axis of the storage chamber.

[0007] The effect is as follows: by setting the adjustable clamping rod group 1 and the clamping rod group 2, the shape of the filter cloth during filtering is changed, so that the filtered impurities are deposited on the protruding part of the filter cloth, the working time of the filter cloth is increased, and hot air is introduced at the same time. During filtering, the temperature of the oil is kept unchanged, and the oil maintains good fluidity. When cleaning the filter cloth, the hot air will increase the pressure in the filter chamber due to the blockage of the filter cloth, so that the oil in the filter chamber is quickly discharged, so as to reduce the number of times and the time required for cleaning the filter.

[0008] Preferably, a center rod is fixedly connected between the two end plates, the center rod is arranged along the axis of the storage cavity, and the output end of the driving source 1 is connected to one of the end plates.

[0009] Preferably, a hollow plate is provided between the adjacent clamp rod group one and clamp rod group two, and both ends of the hollow plate are hinged to the clamp rod group one and clamp rod group two respectively, and there are gaps b between the two side edges of the hollow plate and the clamp rod group one and clamp rod group two, and the width of the gap b is smaller than the thickness of the filter cloth. The effect is that by providing the hollow plate, the support for the filter cloth is increased to prevent the filter cloth from being damaged by force during filtering.

[0010] Preferably, the filter cloth is divided into two sections, and two replacement components are arranged in the storage chamber, which are rotationally symmetrical with the axis of the storage chamber. The replacement components are installed on the clamping rod group 1 / clamping rod group 2, and the replacement components include a winding roller and an unwinding roller. The winding roller is an active driving roller, and the two winding rollers are respectively connected to one end of the two sections of filter cloth, and the other ends of the two sections of filter cloth are respectively connected to the two unwinding rollers. The effect is that by setting two groups of replacement components, the filter cloth can be quickly replaced when it is blocked.

[0011] Preferably, the portion of each section of the filter cloth close to the winding roller passes through the gap b, and the portion of each section of the filter cloth close to the unwinding roller passes through the gap b. The effect is that by allowing the filter cloth to pass through the gap b, the filter cloth is squeezed when it is wound up, preventing the filter cloth from carrying too much oil.

[0012] Preferably, the clamping rod group 1 includes rotating rod 1 and rotating rod 2, rotating rod 1 and rotating rod 2 are arranged radially along the end plate, gap a is located between rotating rod 1 and rotating rod 2, both ends of rotating rod 1 and rotating rod 2 are rotatably set on the telescopic end of the telescopic driving source, and the structures of clamping rod group 1 and clamping rod group 2 are the same.

[0013] Preferably, a plurality of slide grooves are radially arranged on the adjacent sides of the two end plates, and the first clamping rod group and the second clamping rod group both slide radially in the slide grooves.

[0014] Preferably, a sealing strip is installed on the hollow plate, and the sealing strip is in contact with the end plate, which has the effect of: by providing the sealing strip, it is ensured that no leakage occurs in the filter chamber during operation.

[0015] A method for removing slag from raw oil for carbon black production, using the above-mentioned slag removal device, comprises the following steps:

[0016] S1, hot air and oil enter the filter chamber composed of filter cloth and two end plates from the inlet;

[0017] S2, working state, the two sets of telescopic driving sources make the diameter of the polygonal inscribed circle formed by the clamping rod group 2 smaller than the diameter of the polygonal inscribed circle formed by the clamping rod group 1, the filter cloth is a concave polygon, and the hot air keeps the temperature of the oil constant;

[0018] S3, the oil filtered by the filter cloth flows into the storage chamber and is discharged from the outlet opened at the lower end of the storage chamber, and impurities are deposited on the convex part of the filter cloth;

[0019] S4, cleaning state, as the impurities are deposited and the filter cloth is blocked, the oil stops entering the filter chamber, and the filter cloth is made into a regular polygon by two sets of telescopic drive sources. Due to the blockage of the filter cloth, the pressure in the filter chamber increases, so that the remaining oil in the filter chamber is quickly filtered and discharged;

[0020] S5. Driven by the winding roller, the clogged filter cloth is wound onto the winding roller, and the new filter cloth on the unwinding roller is laid to the inner side of the hollow plate, and the filter cloth is restored to the working state for filtering.

[0021] The effect is that the above-mentioned deslagging method can be used to quickly deslagging the oil, maintain the temperature of the oil, and at the same time reduce the number of times the filter cloth is cleaned and the time for replacing the filter cloth to increase the deslagging efficiency.

[0022] The beneficial effects of the present invention are:

[0023] 1. By setting adjustable clamping rod group 1 and clamping rod group 2, the shape of the filter cloth is changed during filtering, so that the filtered impurities are deposited on the convex part of the filter cloth, increasing the working time of the filter cloth. At the same time, hot air is introduced. During filtering, the hot air keeps the temperature of the oil unchanged, and the oil maintains good fluidity. When cleaning the filter cloth, the hot air will increase the pressure in the filter chamber due to the blockage of the filter cloth, so that the oil in the filter chamber is quickly discharged, so as to reduce the number of times and time required to clean the filter.

[0024] 2. By setting up two sets of replacement components, the filter cloth can be quickly replaced when it is blocked, and the filter cloth is allowed to pass through the gap b so that the filter cloth is squeezed when it is rolled up to prevent the filter cloth from carrying too much oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the slag removal device.

[0026] Figure 2 This is a partial view of the slag removal device.

[0027] Figure 3 It is a schematic diagram of the structure of the regulating component.

[0028] Figure 4 yes Figure 3 Enlarged schematic diagram of part A.

[0029] Figure 5 It is a schematic diagram of the replacement component structure.

[0030] Figure 6 It is a schematic diagram of the working status of the slag removal device.

[0031] Figure 7 It is a schematic diagram of the cleaning state of the slag removal device.

[0032] Reference numerals:

[0033] 1. Base; 11. Storage chamber; 12. Outlet; 13. Inlet; 2. Support assembly; 21. Clamping rod group 1; 211. Turning rod 1; 212. Turning rod 2; 22. Clamping rod group 2; 23. Hollow plate; 3. Filter cloth; 31. Replacement assembly; 311. Winding roller; 312. Unwinding roller; 4. Adjustment assembly; 41. End plate; 411. Slide; 42. Telescopic drive source; 43. Center rod; 5. Drive source 1. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 7As shown, a crude oil deslagging device for carbon black production of the present invention comprises a base 1, a support assembly 2, a filter cloth 3, an adjustment assembly 4 and a driving source 5, a storage chamber 11 is arranged on the base 1 along the front-to-back direction, the bottom of the storage chamber 11 is inclined, an outlet 12 is arranged at the lowest point in the storage chamber 11, the support assembly 2 is arranged in a circular array along the axis of the storage chamber 11, the support assembly 2 is provided with a gap a along its length direction, one end of the filter cloth 3 passes through all the gaps a in sequence to form a ring, the adjustment assembly 4 is arranged at both ends of the support assembly 2, the adjustment assembly 4 is rotatably connected to the storage chamber 11, the adjustment assembly 4 and the filter cloth 3 are enclosed to form a filter chamber, the filter cloth 3 rotates around the axis of the storage chamber 11 during filtering, and the adjustment assembly 4 drives the support assembly 2 to slide along the radial direction of the storage chamber 11.

[0036] like Figures 2 to 7 As shown, the support assembly 2 includes a clamping rod group 1 21, a clamping rod group 22 and a hollow plate 23. In this embodiment, six clamping rod groups 1 21 and six clamping rod groups 22 are used as an example for description. The clamping rod group 1 21 and the clamping rod group 2 22 are arranged at intervals. The clamping rod group 1 21 and the clamping rod group 2 22 have the same structure. The clamping rod group 1 21 includes a rotating rod 1 211 and a rotating rod 212. The rotating rod 1 211 and the rotating rod 212 are arranged along the radial direction of the end plate 41. The rotating rod 1 211 is arranged away from the storage cavity 11. On one side of the axis, the gap a is located between the rotating rod 1 211 and the rotating rod 212. Both ends of the rotating rod 1 211 and the rotating rod 212 are rotatably set on the telescopic end of the telescopic driving source 42. The telescopic end of the telescopic driving source 42 is provided with a rotating groove. The two ends of the rotating rod 1 211 and the rotating rod 212 are inserted into the rotating groove. When the filter cloth 3 moves, the rotating rod 1 211 and the rotating rod 212 rotate around their own axes to reduce the friction between the filter cloth 3 and the rotating rod 1 211 and the rotating rod 212.

[0037] like Figures 2 to 7 As shown, rubber sealing strips are installed on the front and rear ends of the hollow plate 23, and the sealing strips are in contact with the two end plates 41 to ensure the sealing between the hollow plate 23 and the end plates 41 during filtering. The two ends of the hollow plate 23 are respectively hinged to the clamping rod group 1 21 and the clamping rod group 2 22. The hollow plate 23 is arranged on the outside of the filter cloth 3. The hollow plate 23 supports the filter cloth 3 during filtering. There are gaps b between the two side edges of the hollow plate 23 and the rotating rod 1 211. The width of the gap b is smaller than the thickness of the filter cloth 3. When the filter cloth 3 passes through the gap b, the rotating rod 1 211 will squeeze the filter cloth 3 so that the oil on the filter cloth 3 is squeezed out.

[0038] like Figures 3 to 7As shown, the adjustment assembly 4 includes a center rod 43, a plurality of telescopic drive sources 42 and two end plates 41. The two end plates 41 are respectively arranged at the front and rear ends of the filter cloth 3 and are rotatably connected to the storage chamber 11. A center rod 43 is fixedly connected between the two end plates 41. The center rod 43 is arranged along the axis of the storage chamber 11 so that the two end plates 41 rotate synchronously. A plurality of slide grooves 411 are radially arranged on one side of the two end plates 41. The slide grooves 411 are arranged in a circular array along the axis of the storage chamber 11. The retractable driving source 42 is arranged in the slide groove 411, and the retractable driving source 42 drives the clamping rod group 1 21 and the clamping rod group 22 to approach / move away from the center rod 43 along the radial direction of the end plate 41. An inlet 13 is opened on the end plate 41 on the front side, and the inlet 13 is connected to the hot air duct. The oil and hot air enter the filter cavity formed by the two end plates 41 and the filter cloth 3 through the inlet 13. The driving source 15 is fixedly arranged on the rear side of the storage cavity 11, and the driving source 15 drives the rear end plate 41 to rotate.

[0039] like Figures 3 to 7 As shown, two replacement components 31 are arranged in the storage chamber 11, which are rotationally symmetrical with the axis of the storage chamber 11. The replacement components 31 are installed on the clamping rod group 1 21 / clamping rod group 22. In this embodiment, the two replacement components 31 are symmetrically arranged on the two clamping rod groups 21 as an example for description. The replacement components 31 are fixed on the telescopic end of the telescopic driving source 42. The replacement component 31 includes a winding roller 311 and an unwinding roller 312. The winding roller 311 and the unwinding roller 312 are symmetrically arranged about the slide groove 411. The winding roller 311 and the unwinding roller 312 can both rotate around their own axes. The winding roller 311 is an active driving roller, preferably an electric roller. The filter cloth 3 is divided into two sections. The two sections of the filter cloth 3 start from the unwinding roller 312 of the replacement component 31, pass through the gap b, pass through multiple gaps a, and reach the gap b on the symmetrical side, and then are connected to the winding roller 311 on the symmetrical side.

[0040] The working principle of the embodiment of the present invention is as follows: hot air and oil enter the filter chamber composed of the filter cloth 3 and the two end plates 41 through the inlet 13 arranged on the front end plate 41, the amount of oil is lower than the center rod 43, the two groups of telescopic driving sources 42 arranged at intervals in the circumferential direction drive the diameter of the polygonal inscribed circle formed by the clamping rod group 22 to be smaller than the diameter of the polygonal inscribed circle formed by the clamping rod group 1 21, the filter cloth 3 is a concave polygon, the driving source 1 5 drives the two end plates 41 to rotate, the oil is filtered by the filter cloth 3, and during filtering, the hot air keeps the temperature in the filter chamber constant, so that the temperature of the oil remains stable and maintains fluidity, the oil is filtered by the filter cloth 3 and flows into the storage chamber 11, and impurities are deposited on the convex part of the filter cloth 3. As the filtering proceeds, the degree of blockage of the filter cloth 3 gradually increases. When the filter cloth 3 is cleaned, the oil Stop entering the filter chamber formed by the filter cloth 3 and the two end plates 41, and two groups of telescopic driving sources 42 make the clamping rod group 22 and the clamping rod group 1 21 slide radially along the end plate 41, so that the inscribed circles of the polygons formed by the clamping rod group 22 and the clamping rod group 1 21 are the same size, and the filter cloth 3 is a regular polygon. Due to the blockage of the filter cloth 3, the hot air increases the pressure in the filter chamber. Under the action of pressure, the remaining oil in the filter chamber is quickly filtered and discharged through the filter cloth 3. After there is no oil remaining in the filter chamber, the winding roller 311 rotates to wind up the filter cloth 3 and replace it. After the filter cloth 3 is replaced, the telescopic driving source 42 makes the clamping rod group 22 and the clamping rod group 1 21 slide radially along the end plate 41, so that the filter cloth 3 is restored to the concave polygonal state for filtering. After multiple uses, the device is disassembled and the filter cloth 3 is replaced.

[0041] A method for removing slag from raw oil for carbon black production, using the above-mentioned slag removal device, comprises the following steps:

[0042] S1, hot air and oil enter the filter chamber composed of filter cloth 3 and two end plates 41 through inlet 13;

[0043] S2, the two sets of telescopic driving sources 42 make the diameter of the polygonal inscribed circle formed by the clamping rod group 22 smaller than the diameter of the polygonal inscribed circle formed by the clamping rod group 1 21, and the filter cloth 3 is in a concave polygon and enters the working state;

[0044] S3, the driving source 5 drives the two end plates 41 to rotate, and the hot air in the filter cavity keeps the temperature of the oil constant;

[0045] S4, the filter cloth 3 filters the oil during rotation, the oil filtered by the filter cloth 3 flows into the storage chamber 11, impurities are deposited on the convex part of the filter cloth 3, and the filtered oil is discharged from the outlet 12 opened at the lower end of the storage chamber 11;

[0046] S5. As the impurities are deposited and the filter cloth 3 is blocked, the oil stops entering the filter chamber, and the two sets of telescopic drive sources 42 make the clamping rod group 22 and the clamping rod group 1 21 slide along the radial direction of the end plate 41, so that the polygonal inscribed circles formed by the clamping rod group 22 and the clamping rod group 1 21 are the same in size, and the filter cloth 3 is a regular polygon;

[0047] S6. Due to the blockage of the filter cloth 3, the pressure in the filter chamber formed by the filter cloth 3 and the two end plates 41 increases, so that the remaining oil in the filter chamber is quickly filtered and discharged;

[0048] S7, the winding roller 311 is started, so that the blocked filter cloth 3 is wound onto the winding roller 311, and the new filter cloth 3 on the unwinding roller 312 is laid to the inner side of the hollow plate 23;

[0049] S8. The telescopic driving source 42 causes the clamping rod group 22 and the clamping rod group 1 21 to slide along the radial direction of the end plate 41, so that the filter cloth 3 returns to the working state for filtering.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A crude oil deslagging device for carbon black production, comprising a base, a storage chamber mounted on the base in a front-to-rear direction, an outlet being provided at the lower end of the storage chamber, characterized in that: include: The support assembly includes a plurality of clamping rod groups 1 and 2, all of which are arranged in a circular array along the axis of the material storage cavity, and the clamping rod groups 1 and 2 are arranged at intervals, and the clamping rod groups 1 and 2 have gaps a along their length directions; Filter cloth, one end of the filter cloth passes through all gaps a in sequence to form a ring; An adjustment component includes a plurality of telescopic drive sources and two end plates, the two end plates are respectively arranged at the front and rear ends of the filter cloth and are rotatably connected to the material storage chamber, a filter chamber is formed between the filter cloth and the two end plates, an inlet is opened on the end plate located on the front side, the inlet is connected to a hot air duct, the plurality of telescopic drive sources are divided into two groups and are respectively installed on the two end plates, a plurality of clamping rod groups 1 and 2 are respectively connected to the telescopic ends of the plurality of telescopic drive sources, and are used to control the radial sliding arrangement of the clamping rod group 1 and 2 along the end plates; A driving source 1 is provided on the material storage cavity and is used to rotate the end plate around the axis of the material storage cavity; The clamping rod group 1 includes a rotating rod 1 and a rotating rod 2, the rotating rod 1 and the rotating rod 2 are arranged along the radial direction of the end plate, the gap a is located between the rotating rod 1 and the rotating rod 2, both ends of the rotating rod 1 and the rotating rod 2 are rotatably arranged on the telescopic end of the telescopic driving source, and the structures of the clamping rod group 1 and the clamping rod group 2 are the same; A plurality of slide grooves are radially arranged on the adjacent sides of the two end plates, and the first clamping rod group and the second clamping rod group both slide radially in the slide grooves.

2. A crude oil deslagging device for carbon black production according to claim 1, characterized in that: A central rod is fixedly connected between the two end plates, the central rod is arranged along the axis of the material storage cavity, and the output end of the driving source 1 is connected to one of the end plates.

3. A crude oil deslagging device for carbon black production according to claim 1, characterized in that: A hollow plate is arranged between the adjacent clamping rod group 1 and clamping rod group 2, and the two ends of the hollow plate are respectively hinged to the clamping rod group 1 and clamping rod group 2, and there are gaps b between the two side edges of the hollow plate and the clamping rod group 1 and clamping rod group 2, and the width of the gap b is less than the thickness of the filter cloth.

4. A crude oil deslagging device for carbon black production according to claim 1, characterized in that: The filter cloth is divided into two sections, and two replacement components are arranged in the storage chamber, which are rotationally symmetrical with the axis of the storage chamber. The replacement components are installed on the clamping rod group 1 / clamping rod group 2, and the replacement components include a winding roller and an unwinding roller. The winding roller is an active driving roller. The two winding rollers are respectively connected to one end of the two sections of filter cloth, and the other ends of the two sections of filter cloth are respectively connected to the two unwinding rollers.

5. A crude oil deslagging device for carbon black production according to claim 4, characterized in that: The portion of each section of the filter cloth close to the winding roller passes through the gap b, and the portion of each section of the filter cloth close to the unwinding roller passes through the gap b.

6. A crude oil deslagging device for carbon black production according to claim 3, characterized in that: A sealing strip is installed on the hollow plate, and the sealing strip abuts against the end plate.

7. A method for removing slag from raw oil for carbon black production, using the slag removal device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, hot air and oil enter the filter chamber composed of filter cloth and two end plates from the inlet; S2, working state, the two sets of telescopic driving sources make the diameter of the polygonal inscribed circle formed by the clamping rod group 2 smaller than the diameter of the polygonal inscribed circle formed by the clamping rod group 1, the filter cloth is a concave polygon, and the hot air keeps the temperature of the oil constant; S3, the oil filtered by the filter cloth flows into the storage chamber and is discharged from the outlet opened at the lower end of the storage chamber, and impurities are deposited on the convex part of the filter cloth; S4, cleaning state, as the impurities are deposited and the filter cloth is blocked, the oil stops entering the filter chamber, and the filter cloth is made into a regular polygon by two sets of telescopic drive sources. Due to the blockage of the filter cloth, the pressure in the filter chamber increases, so that the remaining oil in the filter chamber is quickly filtered and discharged; S5. Driven by the winding roller, the clogged filter cloth is wound onto the winding roller, and the new filter cloth on the unwinding roller is laid to the inner side of the hollow plate, and the filter cloth is restored to the working state for filtering.

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