Oleic acid filter-pressing low-temperature crystallization pretreatment equipment

Abstract

The invention belongs to the technical field of oleic acid pretreatment, and discloses oleic acid filter-pressing low-temperature crystallization pretreatment equipment which comprises a rough filtration shell frame, one side of the top end of the rough filtration shell frame communicates with a feeding pipe, the bottom of the rough filtration shell frame communicates with a discharging pipe, and the side, away from the feeding pipe, of the rough filtration shell frame is fixedly connected with a fixing table; the inner wall of the fixing table is rotatably connected with a rotating frame cover, oleic acid with the volume gradually increased enables the lifting table to descend in the coarse filter shell frame, the lifting table drives the fixing ring to descend, the filter element drives the fixing plate and the special-shaped clamping sleeve to descend, and at the moment, cleaning cotton slides on the outer wall of the special-shaped clamping sleeve, so that the cleaning effect is improved; when the cleaning cotton moves to the outer wall of the filter element, impurities attached to the outer wall of the filter element can be automatically cleaned, a large number of impurities are prevented from blocking filter holes of the filter element, manual intervention is reduced, the maintenance cost is reduced, oleic acid cannot be accumulated or discharged incompletely due to blockage of the filter element in the filtering process, and therefore it is guaranteed that the filtering efficiency is stable, and the oleic acid quality is reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of oleic acid pretreatment, and specifically relates to an oleic acid pressure filtration and low-temperature crystallization pretreatment device. Background Technique

[0002] The oleic acid pressure filtration and low-temperature crystallization pretreatment device generally refers to a series of operations before low-temperature crystallization and pressure filtration, aiming to create the best conditions for the crystallization process to ensure the crystallization effect and the purity of oleic acid. The purpose of pretreatment is to remove impurities in oleic acid or adjust the properties of oleic acid through some physical or chemical means, so that unnecessary components can be removed more efficiently during the low-temperature crystallization process.

[0003] In the prior art during the pretreatment process, it is necessary to perform rough filtration on oleic acid to remove large particle impurities in the oleic acid. This can lay a good foundation for subsequent low-temperature crystallization and fine filtration, ensuring that only finer impurities need to be processed during the pressure filtration process. However, when the prior art filters oleic acid, impurities are usually filtered through a filter element. During the filtration of oleic acid, over time, more and more impurities accumulate on the filter element, clogging the filter holes of the filter element, making it impossible for oleic acid to pass smoothly. As a result, the filtration effect gradually deteriorates and the filtration speed slows down. In addition, excessive clogging may also cause damage to the filter element or require frequent replacement, increasing the maintenance cost. Summary of the Invention

[0004] To solve the problem that the filter holes of the filter element are easily clogged as mentioned in the above background technique, that is, over time, more and more impurities accumulate on the filter element during the filtration of oleic acid, gradually affecting the filtration efficiency of the filter element for oleic acid, the present invention provides an oleic acid pressure filtration and low-temperature crystallization pretreatment device.

[0005] To achieve the above object, the present invention provides the following technical solution: An oleic acid pressure filtration and low-temperature crystallization pretreatment device, including a rough filtration housing frame, one side of the top of the rough filtration housing frame is communicated with a feeding pipe, the bottom of the rough filtration housing frame is communicated with a discharging pipe, a fixed platform is fixedly connected to the side of the rough filtration housing frame away from the feeding pipe, and a rotating frame cover is rotatably connected to the inner wall of the fixed platform. It also includes;

[0006] A filtering mechanism, the filtering mechanism includes a support rod fixedly connected to the bottom of the inner wall of the rough filtration housing frame, a lifting platform is slidably connected to the inner wall of the rough filtration housing frame, four round holes are respectively opened at the top of the lifting platform, four extrusion springs are respectively fixedly connected to the bottom of the lifting platform, and a filtering component is arranged inside the round holes for filtering oleic acid.

[0007] Preferably, the filtering component includes a fixing ring fixedly connected to the inner wall of the round hole. The bottom of the extrusion spring is fixedly connected to the bottom of the inner wall of the coarse filter housing. The top of the fixing ring is fixedly connected with a filter element. The top of the filter element is fixedly connected with a fixing plate. The inner wall of the fixing plate is slidably connected to the outer wall of one end of the support rod. The outer wall of the support rod near the fixing plate is fixedly connected with a connecting plate.

[0008] Preferably, on both sides of the outer wall of the connecting plate are respectively fixedly connected with bent rods. At the side walls of the ends of the bent rods far from the connecting plate are respectively fixedly connected with three circular shell casings. On the outer wall of the filter element are respectively fixedly connected with three special-shaped card sleeves. On both sides of the inner wall of the circular shell casing are respectively penetrated and slidably connected with sliding arc-shaped shell frames.

[0009] Preferably, at the top end of the side of the sliding arc-shaped shell frame far from the circular shell casing is fixedly connected with a cleaning cotton. On the bottom of the side of the sliding arc-shaped shell frame close to the cleaning cotton are opened a number of round holes. One side of the outer wall of the cleaning cotton is in contact with one side of the outer wall of the special-shaped card sleeve. The outer wall of the special-shaped card sleeve is provided with a plurality of grooves.

[0010] Preferably, at one end of the sliding arc-shaped shell frame is provided with an auxiliary component. The auxiliary component includes a square plate communicated with the end of the sliding arc-shaped shell frame far from the cleaning cotton. The square plate is arranged inside the circular shell casing.

[0011] Preferably, on the side of the square plate far from the sliding arc-shaped shell frame is fixedly connected with a return spring. The end of the return spring far from the square plate is fixedly connected to one side of the inner cavity of the circular shell casing. On the side of the square plate close to the return spring is rotatably connected with a rotating plate.

[0012] Preferably, at the end of the rotating plate far from the square plate is rotatably connected with a vertical rod. The top of the vertical rod is fixedly connected with a circular ring plate. The outer wall of the circular ring plate is slidably connected to the inner cavity of the circular shell casing.

[0013] Preferably, at the bottom of the fixing plate is provided with a cleaning component. The cleaning component includes a rotating ring plate rotatably connected to the bottom of the fixing plate. The bottom of the rotating ring plate is fixedly connected with a rotating sleeve.

[0014] Preferably, on one side of the inner wall at the bottom end of the rotating sleeve is fixedly connected with a semi-circular block. On the outer wall of the middle part of the support rod is opened a threaded groove. The outer wall of the semi-circular block is slidably connected to the inner wall of the threaded groove.

[0015] Preferably, on the bottom of the rotating ring plate close to the rotating sleeve are respectively fixedly connected with four limiting strips. On one side of the limiting strip is fixedly connected with a conical cleaning strip. The side of the conical cleaning strip far from the limiting strip is in contact with the inner wall of the filter element.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, by providing a filtering mechanism, oleic acid is poured into the interior of the coarse filter housing frame through the feed pipe. After the oleic acid passes through the filter holes provided in the filter element and enters the interior of the filter element, the filter holes on the filter element will play a role in blocking impurities. In this way, larger particulate impurities and other insoluble substances will be intercepted by the filter element, and the filtered oleic acid will enter the bottom of the inner wall of the coarse filter housing frame. After the filtered oleic acid enters the discharge pipe, it is discharged outward, thus facilitating the subsequent low-temperature crystallization work. When oleic acid continuously enters the interior of the coarse filter housing frame, the impurities in the oleic acid will gradually block the filter holes of the filter element, causing the oleic acid to gradually accumulate on the top of the lifting platform. The oleic acid with a gradually increasing volume causes the lifting platform to descend inside the coarse filter housing frame. The lifting platform drives the fixed ring to descend, and the filter element drives the fixing plate and the special-shaped bushing to descend. At this time, the cleaning cotton will slide on the outer wall of the special-shaped bushing. When the cleaning cotton moves to the outer wall of the filter element, it can automatically clean the impurities adhering to the outer wall of the filter element, preventing a large amount of impurities from blocking the filter holes of the filter element, reducing manual intervention, and lowering the maintenance cost. Moreover, during the filtering process, the oleic acid will not accumulate or be incompletely discharged due to the blockage of the filter element, thereby ensuring stable filtering efficiency and reliable oleic acid quality.

[0018] In the present invention, through the cooperation of the filtering component and the auxiliary component, when the cleaning cotton slides on the outer wall of the special-shaped bushing, since the outer wall of the special-shaped bushing is inclined and provided with a plurality of grooves, the friction between the cleaning cotton and the side wall of the sliding arc-shaped housing frame and the special-shaped bushing can be increased, thereby reducing the descending speed of the lifting platform driving the filter element, preventing the falling speed from being too fast and generating an impact force, and improving the stability of the lifting process laterally. When the cleaning cotton and the sliding arc-shaped housing frame slide on the outer wall of the special-shaped bushing, under the reaction force of the special-shaped bushing, the cleaning cotton and the sliding arc-shaped housing frame move into the interior of the circular ring housing. The sliding arc-shaped housing frame drives the circular ring plate in the auxiliary component to vertically move upward along the inner cavity of the circular ring housing. When the sliding arc-shaped housing frame and the cleaning cotton are no longer in contact with the special-shaped bushing, under the elastic extrusion of the return spring, the circular ring plate descends in the inner cavity of the circular ring housing, causing the oleic acid in the inner cavity of the circular ring housing to enter the interior of the sliding arc-shaped housing frame. The oleic acid sprays out from the circular holes provided in the sliding arc-shaped housing frame towards the outer wall of the filter element, disturbing the oleic acid near the filter element and helping to remove the dirt or impurities on the surface of the filter element, expanding the cleaning range of the filter holes of the filter element.

[0019] Through the cooperation of the arranged filtering component and cleaning component, in the present invention, when the fixing plate in the filtering component drives the rotating ring plate, rotating sleeve and semi-circular block to descend, during the descending process of the semi-circular block, it comes into contact with the threaded groove of the support rod and is caught by the threaded groove, causing the semi-circular block to drive the rotating sleeve to rotate around the support rod. The rotating sleeve drives the rotating ring plate to rotate, the rotating ring plate drives the limiting strip to rotate, and the limiting strip drives the conical cleaning strip to rotate. During the rotation of the conical cleaning strip, it can scrape and clean the inner wall of the filter element, cooperate with the structure for cleaning the outer wall of the filter element, improve the cleaning effect of the filter holes of the filter element, prevent impurities of particulate matter types from extending at one end on the inner wall of the filter holes of the filter element, maintain the cleanliness of the filter element, avoid blockage of the filter element, and ensure the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic cross-sectional structure view of the coarse filter housing frame of the present invention;

[0021] Figure 2 is a schematic cross-sectional structure view of the whole of the present invention;

[0022] Figure 3 For the present invention Figure 2 is an enlarged view of A in;

[0023] Figure 4 is a schematic side structure view of the filter element of the present invention;

[0024] Figure 5 For the present invention Figure 4 is an enlarged view of B in;

[0025] Figure 6 is a schematic cross-sectional structure view of the support rod of the present invention;

[0026] Figure 7 For the present invention Figure 6 is an enlarged view of C in;

[0027] Figure 8 is a schematic side structure view of the special-shaped retaining sleeve of the present invention;

[0028] Figure 9 For the present invention Figure 8 is an enlarged view of D in;

[0029] Figure 10 is a schematic bottom view structure view of the circular ring plate of the present invention.

[0030] In the figure: 1. Coarse filter housing frame; 2. Feed pipe; 3. Discharge pipe; 4. Fixed platform; 5. Rotating frame cover; 6. Filter mechanism; 61. Support rod; 62. Lifting platform; 63. Extrusion spring; 64. Filter component; 65. Auxiliary component; 66. Cleaning component; 641. Fixed ring; 642. Filter element; 643. Fixed plate; 644. Connecting plate; 645. Bent rod; 646. Circular ring housing; 647. Special-shaped clamping sleeve; 648. Sliding arc-shaped housing frame; 649. Cleaning cotton; 651. Square plate; 652. Return spring; 653. Rotating plate; 654. Vertical rod; 655. Circular ring plate; 661. Rotating ring plate; 662. Rotating sleeve; 663. Semi-circular block; 665. Conical cleaning strip; 664. Limiting strip. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] As Figures 1 to 10 shown, the present invention provides a low-temperature crystallization pretreatment device for oleic acid filtration, including a coarse filter housing frame 1. One side of the top end of the coarse filter housing frame 1 is communicated with a feed pipe 2, the bottom of the coarse filter housing frame 1 is communicated with a discharge pipe 3, and one side of the coarse filter housing frame 1 away from the feed pipe 2 is fixedly connected with a fixed platform 4. The inner wall of the fixed platform 4 is rotatably connected with a rotating frame cover 5, and further includes;

[0033] A filter mechanism 6. The filter mechanism 6 includes a support rod 61 fixedly connected to the bottom of the inner wall of the coarse filter housing frame 1. The inner wall of the coarse filter housing frame 1 is slidably connected with a lifting platform 62. Four circular holes are respectively formed in the top of the lifting platform 62, and four extrusion springs 63 are respectively fixedly connected to the bottom of the lifting platform 62. A filter component 64 is arranged inside the circular holes for filtering oleic acid.

[0034] With the above solution: The oleic acid with gradually increasing volume causes the lifting platform 62 to descend inside the coarse filter housing frame 1. The lifting platform 62 drives the fixed ring 641 to descend, and the filter element 642 drives the fixed plate 643 and the special-shaped clamping sleeve 647 to descend. At this time, the cleaning cotton 649 will slide on the outer wall of the special-shaped clamping sleeve 647. When the cleaning cotton 649 moves to the outer wall of the filter element 642, it can automatically clean the impurities attached to the outer wall of the filter element 642, prevent a large amount of impurities from blocking the filter holes of the filter element 642, reduce manual intervention, and reduce the maintenance cost. Moreover, the oleic acid will not accumulate or be discharged incompletely due to filter element blockage during the filtration process, thereby ensuring stable filtration efficiency and reliable oleic acid quality.

[0035] The filtering component 64 includes a fixing ring 641 fixedly connected to the inner wall of the round hole. The bottom of the extrusion spring 63 is fixedly connected to the bottom of the inner wall of the coarse filter housing frame 1. The top of the fixing ring 641 is fixedly connected with a filter element 642. The top of the filter element 642 is fixedly connected with a fixing plate 643. The inner wall of the fixing plate 643 is slidably connected to the outer wall of one end of the support rod 61. A connecting plate 644 is fixedly connected to the outer wall of the support rod 61 near the fixing plate 643.

[0036] Adopting the above solution: The setting of the extrusion spring 63 is that when the weight of the oleic acid is not enough to cause the lifting table 62 to descend, the elastic deformation of the extrusion spring 63 causes the lifting table 62 to perform a rising and resetting movement.

[0037] On both sides of the outer wall of the connecting plate 644, bent rods 645 are respectively fixedly connected. At the side walls of one ends of the bent rods 645 far away from the connecting plate 644, three circular ring shells 646 are respectively fixedly connected. On the outer walls of the filter element 642, three special-shaped card sleeves 647 are respectively fixedly connected. On both sides of the inner wall of the circular ring shell 646, sliding arc-shaped shell frames 648 penetrate through and are slidably connected.

[0038] Adopting the above solution: The purpose of setting multiple groups of circular ring shells 646 and special-shaped card sleeves 647 is to be able to comprehensively clean the outer wall of the filter element 642, prevent incomplete cleaning, and expand the cleaning range.

[0039] At the top of one side of the sliding arc-shaped shell frame 648 far away from the circular ring shell 646, a cleaning cotton 649 is fixedly connected. On the bottom of one side of the sliding arc-shaped shell frame 648 close to the cleaning cotton 649, a plurality of round holes are opened. One side of the outer wall of the cleaning cotton 649 is in contact with one side of the outer wall of the special-shaped card sleeve 647. The outer wall of the special-shaped card sleeve 647 is provided with a plurality of grooves.

[0040] Adopting the above solution: The cleaning cotton 649 has elasticity. When it is not in contact with the special-shaped card sleeve 647, it automatically restores, so as to closely fit with the outer wall of the filter element 642 and clean the impurities existing on the outer wall of the filter element 642.

[0041] As Figures 1 to 10 shown, an auxiliary component 65 is arranged at one end of the sliding arc-shaped shell frame 648. The auxiliary component 65 includes a square plate 651 communicated with one end of the sliding arc-shaped shell frame 648 far away from the cleaning cotton 649. The square plate 651 is arranged inside the circular ring shell 646.

[0042] A reset spring 652 is fixedly connected to one side of the square plate 651 far away from the sliding arc-shaped shell frame 648. One end of the reset spring 652 far away from the square plate 651 is fixedly connected to one side of the inner cavity of the circular ring shell 646. A rotating plate 653 is rotatably connected to one side of the square plate 651 close to the reset spring 652.

[0043] One end of the rotating plate 653 away from the square plate 651 is rotatably connected to a vertical rod 654. The top of the vertical rod 654 is fixedly connected to a circular ring plate 655. The outer wall of the circular ring plate 655 is slidably connected to the inner cavity of the circular ring shell 646.

[0044] A cleaning assembly 66 is provided at the bottom of the fixed plate 643. The cleaning assembly 66 includes a rotating ring plate 661 rotatably connected to the bottom of the fixed plate 643. The bottom of the rotating ring plate 661 is fixedly connected to a rotating sleeve 662.

[0045] One side of the inner wall at the bottom end of the rotating sleeve 662 is fixedly connected to a semi-circular block 663. A threaded groove is formed in the outer wall of the middle end of the support rod 61. The outer wall of the semi-circular block 663 is slidably connected to the inner wall of the threaded groove.

[0046] With the above solution: During the lifting process of the semi-circular block 663, it will move around the inner wall of the threaded groove, so that the rotating ring plate 661 rotates along the inner wall of the filter element 642.

[0047] Four limiting strips 664 are respectively fixedly connected to the bottom of the rotating ring plate 661 close to the rotating sleeve 662. One side of the limiting strip 664 is fixedly connected to a conical cleaning strip 665. The side of the conical cleaning strip 665 away from the limiting strip 664 is in contact with the inner wall of the filter element 642.

[0048] With the above solution: During the rotation of the conical cleaning strip 665, it can scrape and clean the inner wall of the filter element 642. It cooperates with the structure for cleaning the outer wall of the filter element 642, improves the cleaning effect of the filter holes of the filter element 642, prevents particulate impurities from extending into the inner wall of the filter holes of the filter element 642, and maintains the cleanliness of the filter element.

[0049] The working principle and usage process of the present invention:

[0050] Pour oleic acid into the interior of the coarse filter housing frame 1 through the feed pipe 2. After the oleic acid enters the interior of the filter element 642 through the filter holes opened at the filter element 642, the filter holes on the filter element 642 will play a role in blocking impurities. In this way, larger particulate impurities and other insoluble substances will be intercepted by the filter element 642, and the filtered oleic acid will enter the bottom of the inner wall of the coarse filter housing frame 1. After the filtered oleic acid enters the discharge pipe 3, it is discharged outward, thus facilitating the subsequent low-temperature crystallization work. When oleic acid continuously enters the interior of the coarse filter housing frame 1, the impurities in the oleic acid will gradually block the filter holes of the filter element 642, causing the oleic acid to gradually accumulate on the top of the lifting platform 62. The oleic acid with gradually increasing volume causes the lifting platform 62 to descend inside the coarse filter housing frame 1. The lifting platform 62 drives the fixed ring 641 to descend, and the filter element 642 drives the fixing plate 643 and the special-shaped bushing 647 to descend. At this time, the cleaning cotton 649 will slide on the outer wall of the special-shaped bushing 647. When the cleaning cotton 649 moves to the outer wall of the filter element 642, it can automatically clean the impurities attached to the outer wall of the filter element 642, prevent a large amount of impurities from blocking the filter holes of the filter element 642, reduce manual intervention, and lower the maintenance cost. Moreover, during the filtration process, the oleic acid will not accumulate or be incompletely discharged due to filter element blockage, thus ensuring stable filtration efficiency and reliable oleic acid quality.

[0051] When the cleaning cotton 649 slides on the outer wall of the special-shaped bushing 647, because the outer wall of the special-shaped bushing 647 is inclined and provided with a plurality of grooves, it can increase the friction force between the cleaning cotton 649 and the side walls of the sliding arc-shaped housing frame 648 and the special-shaped bushing 647 in contact, thereby reducing the descending speed of the lifting platform 62 driving the filter element 642, preventing the falling speed from being too fast and generating an impact force, and laterally improving the stability of the lifting process. When the cleaning cotton 649 and the sliding arc-shaped housing frame 648 slide on the outer wall of the special-shaped bushing 647, they are subjected to the reaction force of the special-shaped bushing 647, causing the cleaning cotton 649 and the sliding arc-shaped housing frame 648 to move into the interior of the circular ring housing 646. The sliding arc-shaped housing frame 648 drives the square plate 651 to move, the square plate 651 drives the rotating plate 653 to move, and the rotating plate 653 drives the vertical rod 654 and the circular ring plate 655 to vertically move upward along the inner cavity of the circular ring housing 646. When the sliding arc-shaped housing frame 648 and the cleaning cotton 649 are no longer in contact with the special-shaped bushing 647, they are elastically extruded by the return spring 652, causing the circular ring plate 655 to descend in the inner cavity of the circular ring housing 646, enabling the oleic acid in the inner cavity of the circular ring housing 646 to enter the interior of the sliding arc-shaped housing frame 648. The oleic acid sprays out from the circular holes opened at the sliding arc-shaped housing frame 648 onto the outer wall of the filter element 642, disturbing the oleic acid near the filter element 642 and helping to remove the dirt or impurities on the surface of the filter element, expanding the cleaning range of the filter holes of the filter element 642.

[0052] When the fixed plate 643 in the filter component 64 drives the rotating ring plate 661, the rotating sleeve 662, and the semi-circular block 663 to descend, during the descent of the semi-circular block 663, it comes into contact with the threaded groove of the support rod 61 and is caught by the threaded groove, causing the semi-circular block 663 to drive the rotating sleeve 662 to rotate around the support rod 61. The rotating sleeve 662 drives the rotating ring plate 661 to rotate, the rotating ring plate 661 drives the limiting strip 664 to rotate, and the limiting strip 664 drives the conical cleaning strip 665 to rotate. During the rotation of the conical cleaning strip 665, it can scrape and clean the inner wall of the filter element 642, cooperating with the structure for cleaning the outer wall of the filter element 642, improving the cleaning effect of the filter holes of the filter element 642, preventing particulate impurities from extending at one end on the inner wall of the filter holes of the filter element 642, maintaining the cleanliness of the filter element, avoiding filter element blockage, and ensuring the normal operation of the system.

[0053] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0054] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oleic acid pressure filtration and low-temperature crystallization pretreatment device, comprising a rough filtration shell frame (1), one side of the top of the rough filtration shell frame (1) is communicated with a feed pipe (2), the bottom of the rough filtration shell frame (1) is communicated with a discharge pipe (3), a fixed platform (4) is fixedly connected to one side of the rough filtration shell frame (1) away from the feed pipe (2), and a rotating frame cover (5) is rotatably connected to the inner wall of the fixed platform (4), characterized in that: Further included are; A filtering mechanism (6), the filtering mechanism (6) includes a support rod (61) fixedly connected to the bottom of the inner wall of the coarse filter housing frame (1), a lifting table (62) is slidably connected to the inner wall of the coarse filter housing frame (1), four round holes are respectively formed in the top of the lifting table (62), four extrusion springs (63) are respectively fixedly connected to the bottom of the lifting table (62), and a filtering component (64) is arranged inside the round holes for filtering oleic acid.

2. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 1, characterized in that: The filtering component (64) includes a fixed ring (641) fixedly connected to the inner wall of the round hole, the bottom of the extrusion spring (63) is fixedly connected to the bottom of the inner wall of the coarse filter housing frame (1), a filter element (642) is fixedly connected to the top of the fixed ring (641), a fixing plate (643) is fixedly connected to the top of the filter element (642), the inner wall of the fixing plate (643) is slidably connected to the outer wall of one end of the support rod (61), and a connecting plate (644) is fixedly connected to the outer wall of the support rod (61) near the fixing plate (643).

3. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 2, wherein: Two bent rods (645) are respectively fixedly connected to the two sides of the outer wall of the connecting plate (644), three circular ring shells (646) are respectively fixedly connected to the side walls of the bent rods (645) far away from the connecting plate (644), three special-shaped card sleeves (647) are respectively fixedly connected to the outer wall of the filter element (642), and two sliding arc-shaped housing frames (648) are respectively penetrated and slidably connected to the two sides of the inner wall of the circular ring shell (646).

4. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 3, wherein: A cleaning cotton (649) is fixedly connected to the top end of the side of the sliding arc-shaped housing frame (648) far away from the circular ring shell (646), a number of round holes are formed in the bottom of the side of the sliding arc-shaped housing frame (648) close to the cleaning cotton (649), one side of the outer wall of the cleaning cotton (649) is in contact with one side of the outer wall of the special-shaped card sleeve (647), and the outer wall of the special-shaped card sleeve (647) is provided with a plurality of grooves.

5. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 4, wherein: An auxiliary component (65) is arranged at one end of the sliding arc-shaped housing frame (648), and the auxiliary component (65) includes a square plate (651) communicated with the end of the sliding arc-shaped housing frame (648) far away from the cleaning cotton (649), and the square plate (651) is arranged inside the circular ring shell (646).

6. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 5, characterized in that: A return spring (652) is fixedly connected to the side of the square plate (651) far away from the sliding arc-shaped housing frame (648), the end of the return spring (652) far away from the square plate (651) is fixedly connected to one side of the inner cavity of the circular ring shell (646), and a rotating plate (653) is rotatably connected to the side of the square plate (651) close to the return spring (652).

7. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 6, wherein: A vertical rod (654) is rotatably connected to the end of the rotating plate (653) far away from the square plate (651), a circular ring plate (655) is fixedly connected to the top of the vertical rod (654), and the outer wall of the circular ring plate (655) is slidably connected to the inner cavity of the circular ring shell (646).

8. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 7, wherein: A cleaning component (66) is provided at the bottom of the fixed plate (643). The cleaning component (66) includes a rotating ring plate (661) rotatably connected to the bottom of the fixed plate (643), and a rotating sleeve (662) is fixedly connected to the bottom of the rotating ring plate (661).

9. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 8, wherein: One side of the inner wall at the bottom end of the rotating sleeve (662) is fixedly connected with a semi-circular block (663). A threaded groove is formed in the outer wall of the middle end of the support rod (61), and the outer wall of the semi-circular block (663) is slidably connected to the inner wall of the threaded groove.

10. The oleic acid pressure filtration and low-temperature crystallization pretreatment equipment according to claim 9, characterized in that: Four limiting strips (664) are fixedly connected to the bottom of the rotating ring plate (661) close to the rotating sleeve (662). A conical cleaning strip (665) is fixedly connected to one side of the limiting strip (664), and the side of the conical cleaning strip (665) away from the limiting strip (664) is in contact with the inner wall of the filter element (642).

Images