A terephthalic acid di-octyl ester filter press device

Abstract

The utility model relates to the technical field of terephthalic acid dioctyl ester production especially, a kind of terephthalic acid dioctyl ester filter-pressing device, it is cooperated by filtering mechanism and circulation component to realize the filtering operation of terephthalic acid dioctyl ester, so that filtering effect is better, after filtering is completed, the replacement of filter paper is cleaned and filtered cartridge, convenient for next cycle filtration;Four supporting legs are symmetrically fixed and installed at the bottom end of working tank, working tank and cover plate are connected by two connecting mechanisms, filtering mechanism is arranged in working tank, filtering mechanism includes filter cartridge, filter cartridge is slidably connected with working tank, baffle is fixedly installed in filter cartridge, a plurality of filter plates are symmetrically arranged on filter cartridge, filter paper is arranged on each filter plate, a plurality of plug blocks are symmetrically fixed and installed on the outer side wall of filter cartridge, a plurality of sliding grooves are formed in working tank, each plug block is slidably connected with corresponding sliding groove, a plurality of limiting grooves are symmetrically formed in cover plate.

Description

Technical Field

[0001] This utility model relates to the technical field of dioctyl terephthalate production, specifically to a dioctyl terephthalate pressure filtration device. Background Technology

[0002] Dioctyl terephthalate (DOTP) is an organic compound, a transparent oily liquid, insoluble in water but soluble in common organic solvents. It is a high-performance primary plasticizer used in polyvinyl chloride (PVC) plastics. The production of DOTP involves alcoholysis, esterification, neutralization, and filtration. Pressure filtration is the final step in the entire production process and the culmination of the previous steps. During preparation, DOTP requires pressure filtration; the filtered product is directly exported, and the resulting carbon residue needs to be recycled.

[0003] Currently, during the preparation process, the crude resin is first subjected to pressure filtration and circulation before filtration until the material in the glass sight glass is transparent, free of activated carbon, impurities, and milky turbidity.

[0004] A search revealed a utility model patent in China with publication number CN213466970U: a filtration device for the dioctyl terephthalate process, comprising a cylinder, a filter screen, a top cover, a support, a bottom cover, and a heating vessel. The top cover is horizontally positioned above the cylinder, the filter screen is vertically positioned inside the cylinder, the support is positioned below the cylinder, the bottom cover is horizontally fixed below the cylinder, and the heating vessel is positioned on the outer wall of the cylinder. The beneficial technical effects of this device are: heating is performed using a heating vessel, and the heat-conducting liquid enters from below without generating bubbles, which can uniformly heat and create the constant temperature environment required for filtration.

[0005] However, existing technical solutions still have the problem of inconvenient replacement of filter screens, inability to circulate and filter materials, and poor filtration effect. Therefore, a dioctyl terephthalate pressure filter device is needed to improve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a dioctyl terephthalate pressure filter that achieves filtration of dioctyl terephthalate through the cooperation of a filtration mechanism and a circulation component, resulting in better filtration. After filtration, the filter cartridge is cleaned and the filter paper is replaced to facilitate the next cycle of filtration.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a dioctyl terephthalate pressure filter device, comprising a working chamber and a cover plate, wherein four support legs are symmetrically fixedly installed at the bottom of the working chamber;

[0010] The work box and the cover are connected by two connecting mechanisms;

[0011] The working chamber is equipped with a filtration mechanism, which includes a filter cylinder that is slidably connected to the working chamber. A partition is fixedly installed inside the filter cylinder. Multiple filter plates are symmetrically arranged on the filter cylinder, and each filter plate is equipped with filter paper. Multiple inserts are symmetrically fixedly installed on the outer wall of the filter cylinder. Multiple sliding grooves are opened on the working chamber, and each insert is slidably connected to the corresponding sliding groove. Multiple limiting grooves are symmetrically opened on the cover plate, and a pressure plate is slidably installed in each limiting groove. An insert rod is fixedly installed on each limiting groove, and the insert rod is slidably connected to the corresponding pressure plate and insert. Two first springs are symmetrically fixedly installed on each pressure plate, and each first spring is fixedly connected to the corresponding limiting groove.

[0012] The working box is equipped with a circulation assembly, which also includes a circulation inlet pipe. The circulation inlet pipe is connected to the bottom of the working box, and the end of the circulation inlet pipe away from the working box is connected to a cover plate. A first inlet pipe is installed on the cover plate. A pump body is fixedly installed on the outer wall of the working box and is connected to the circulation inlet pipe. A first outlet pipe is installed at the bottom of the working box, and one end of the first outlet pipe is connected to the circulation inlet pipe. A first valve is installed on the first outlet pipe, and a second outlet pipe is installed on the first outlet pipe. A second valve is installed on the second outlet pipe.

[0013] Preferably, one of the connecting mechanisms includes a locking block, which is fixedly installed on the work box. A movable groove is provided on the cover plate, and an L-shaped plate is slidably installed in the movable groove. A second spring is fixedly installed on the L-shaped plate, and the other end of the second spring is fixedly connected to the movable groove.

[0014] Furthermore, a U-shaped plate is fixedly installed on the outer wall of the working box, and the circulating liquid inlet pipe passes through the U-shaped plate.

[0015] Furthermore, two observation windows are symmetrically provided on the outer wall of the work box.

[0016] Based on the aforementioned scheme, a stabilizing plate is fixedly installed at the bottom of the working box, and the circulating liquid inlet pipe passes through the stabilizing plate.

[0017] Furthermore, two auxiliary plates are symmetrically fixedly installed on the filter cartridge.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a dioctyl terephthalate pressure filtration device, which has the following beneficial effects:

[0020] Place the filter cartridge inside the working chamber, cover it with the cover plate, and use multiple pressure plates to squeeze multiple inserts to make the filter cartridge more stable. Connect the cover plate to the working chamber through the cooperation of two connecting mechanisms to make the cover plate more stable. Install the first liquid inlet pipe and the circulating liquid inlet pipe, add liquid into the working chamber through the first liquid inlet pipe, filter it through the filter cartridge, and the filtered liquid re-enters the working chamber through the circulating liquid inlet pipe for secondary filtration. When the liquid becomes transparent, the filtration is complete. Close the first valve and open the second valve to allow the liquid to be discharged through the second liquid outlet pipe, thereby improving the filtration effect. After filtration, clean the filter cartridge and replace the filter paper to facilitate the next cycle filtration. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the stabilizing plate of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the filter cartridge of this utility model;

[0025] Figure 5 This utility model Figure 4 A magnified structural diagram of part A in the middle.

[0026] The following are labels in the attached diagram: 1. Working box; 2. Support leg; 3. Cover plate; 4. Filter cylinder; 5. Partition plate; 6. Filter plate; 7. Insert block; 8. Pressure plate; 9. Insert rod; 10. First spring; 11. Locking block; 12. L-shaped plate; 13. Second spring; 14. First inlet pipe; 15. Circulating inlet pipe; 16. Pump body; 17. First outlet pipe; 18. First valve; 19. Second outlet pipe; 20. Second valve; 21. U-shaped plate; 22. Observation window; 23. Stabilizing plate; 24. Auxiliary plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0028] Please see Figure 1 and Figure 2 A dioctyl terephthalate pressure filter device includes a working chamber 1 and a cover plate 3. Four support legs 2 are symmetrically fixedly installed at the bottom of the working chamber 1.

[0029] Please see Figure 1-5 The working box 1 and the cover plate 3 are connected by two connecting mechanisms. One of the connecting mechanisms includes a locking block 11, which is fixedly installed on the working box 1. The cover plate 3 has a moving groove, and an L-shaped plate 12 is slidably installed in the moving groove. A second spring 13 is fixedly installed on the L-shaped plate 12, and the other end of the second spring 13 is fixedly connected to the moving groove. By locking the locking block 11 and the L-shaped plate 12, the connection operation between the working box 1 and the cover plate 3 is realized, making the cover plate 3 more stable.

[0030] Please see Figure 1-4 The working box 1 is equipped with a filtration mechanism, which includes a filter cylinder 4. The filter cylinder 4 is slidably connected to the working box 1. A partition 5 is fixedly installed inside the filter cylinder 4. Multiple filter plates 6 are symmetrically arranged on the filter cylinder 4, and each filter plate 6 is equipped with filter paper. Multiple insert blocks 7 are symmetrically fixedly installed on the outer wall of the filter cylinder 4. Multiple sliding grooves are opened on the working box 1, and each insert block 7 is slidably connected to the corresponding sliding groove. Multiple limiting grooves are symmetrically opened on the cover plate 3. A pressure plate 8 is slidably installed in each limiting groove. An insert rod 9 is fixedly installed on each limiting groove and is slidably connected to the corresponding pressure plate 8 and insert block 7. Two first springs 10 are symmetrically fixedly installed on each pressure plate 8, and each first spring 10 is fixedly connected to the corresponding limiting groove. The filter cylinder 4 is placed inside the working box 1, and the cover plate 3 is closed. Multiple pressure plates 8 squeeze multiple insert blocks 7 to make the filter cylinder 4 more stable. The cover plate 3 is connected to the working box 1 through the cooperation of two connecting mechanisms to make the cover plate 3 more stable.

[0031] Please see Figure 1 and Figure 2The working chamber 1 is equipped with a circulation assembly, which includes a circulation inlet pipe 15. The circulation inlet pipe 15 is connected to the bottom of the working chamber 1, and the end of the circulation inlet pipe 15 away from the working chamber 1 is connected to the cover plate 3. A first inlet pipe 14 is installed on the cover plate 3. A pump body 16 is fixedly installed on the outer wall of the working chamber 1, and the pump body 16 is connected to the circulation inlet pipe 15. After the first inlet pipe 14 and the circulation inlet pipe 15 are installed, liquid is added to the working chamber 1 through the first inlet pipe 14, filtered through the filter cartridge 4, and the filtered liquid re-enters the working chamber 1 through the circulation inlet pipe 15. The filter undergoes secondary filtration. The bottom of the working chamber 1 is connected to a first outlet pipe 17, one end of which is connected to a circulating inlet pipe 15. A first valve 18 is installed on the first outlet pipe 17, and a second outlet pipe 19 is connected to the first outlet pipe 17. A second valve 20 is installed on the second outlet pipe 19. When the liquid becomes transparent, the filtration is complete. The first valve 18 is closed, and the second valve 20 is opened to allow the liquid to be discharged through the second outlet pipe 19, thereby improving the filtration effect. After filtration, the filter cartridge 4 is cleaned and the filter paper is replaced to facilitate the next cycle filtration.

[0032] Please see Figure 1 and Figure 3 A U-shaped plate 21 is fixedly installed on the outer wall of the working box 1. The circulating liquid inlet pipe 15 passes through the U-shaped plate 21. The U-shaped plate 21 makes the circulating liquid inlet pipe 15 more stable.

[0033] Please see Figure 1 and Figure 3 It should also be noted that two observation windows 22 are symmetrically provided on the outer side wall of the work box 1. The two observation windows 22 facilitate timely observation of the internal condition of the work box 1.

[0034] Please see Figure 2 and Figure 3 A stabilizing plate 23 is fixedly installed at the bottom of the working box 1. The circulating liquid inlet pipe 15 passes through the stabilizing plate 23. The stabilizing plate 23 makes the circulating liquid inlet pipe 15 more stable.

[0035] Please see Figure 4 Two auxiliary plates 24 are symmetrically fixed on the filter cylinder 4. The setting of the two auxiliary plates 24 facilitates the movement of the filter cylinder 4.

[0036] In summary, when using this dioctyl terephthalate pressure filtration device, the filter cartridge 4 is placed inside the working chamber 1, and the cover plate 3 is closed. Multiple pressure plates 8 compress multiple insert blocks 7, making the filter cartridge 4 more stable. By sliding the two L-shaped plates 12, the two second springs 13 are compressed, causing the two L-shaped plates 12 to pass through the two locking blocks 11. Releasing the two L-shaped plates 12 allows the elastic force of the two second springs 13 to reset them, locking the two L-shaped plates 12 with the two locking blocks 11. This connects the cover plate 3 to the working chamber 1, making the cover plate 3 more stable. The first inlet pipe 14 and the circulation pipe are then installed. Liquid pipe 15 divides filter cylinder 4 into two sides via partition 5. Liquid is added to working chamber 1 through first inlet pipe 14 and filtered through one side of filter cylinder 4. The filtered liquid re-enters working chamber 1 through circulating inlet pipe 15 for secondary filtration on the other side. When the liquid becomes transparent, filtration is complete. Close first valve 18 and open second valve 20 to allow liquid to drain through second outlet pipe 19, thus improving filtration efficiency. After filtration, remove circulating inlet pipe 15, release the limiting operation of cover plate 3, slide filter cylinder 4 to detach it from working chamber 1, and clean filter cylinder 4 and replace filter paper for the next filtration cycle.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dioctyl terephthalate pressure filtration device, comprising a working chamber (1) and a cover plate (3), characterized in that: The bottom of the work box (1) is symmetrically fixed with four support legs (2); The work box (1) and the cover plate (3) are connected by two connecting mechanisms; The working box (1) is equipped with a filtration mechanism, which includes a filter cylinder (4). The filter cylinder (4) is slidably connected to the working box (1). A partition plate (5) is fixedly installed inside the filter cylinder (4). Multiple filter plates (6) are symmetrically arranged on the filter cylinder (4). Each filter plate (6) is equipped with filter paper. Multiple insert blocks (7) are symmetrically fixedly installed on the outer wall of the filter cylinder (4). Multiple sliding grooves are opened on the working box (1). Each insert block (7) is slidably connected to the corresponding sliding groove. Multiple limiting grooves are symmetrically opened on the cover plate (3). A pressure plate (8) is slidably installed in each limiting groove. An insert rod (9) is fixedly installed on each limiting groove. The insert rod (9) is slidably connected to the corresponding pressure plate (8) and insert block (7). Two first springs (10) are symmetrically fixedly installed on each pressure plate (8). Each first spring (10) is fixedly connected to the corresponding limiting groove. The working box (1) is equipped with a circulation assembly, which also includes a circulation inlet pipe (15). The circulation inlet pipe (15) is connected to the bottom end of the working box (1). The end of the circulation inlet pipe (15) away from the working box (1) is connected to the cover plate (3). The cover plate (3) is connected to the first inlet pipe (14). The outer wall of the working box (1) is fixedly installed with a pump body (16). The pump body (16) is connected to the circulation inlet pipe (15). The bottom end of the working box (1) is connected to the first outlet pipe (17). One end of the first outlet pipe (17) is connected to the circulation inlet pipe (15). The first outlet pipe (17) is equipped with a first valve (18). The first outlet pipe (17) is connected to the second outlet pipe (19). The second outlet pipe (19) is equipped with a second valve (20).

2. The dioctyl terephthalate pressure filtration device according to claim 1, characterized in that: One of the connecting mechanisms includes a locking block (11), which is fixedly installed on the work box (1). A moving groove is provided on the cover plate (3), and an L-shaped plate (12) is slidably installed in the moving groove. A second spring (13) is fixedly installed on the L-shaped plate (12), and the other end of the second spring (13) is fixedly connected to the moving groove.

3. The dioctyl terephthalate pressure filtration device according to claim 2, characterized in that: A U-shaped plate (21) is fixedly installed on the outer wall of the working box (1), and the circulating liquid inlet pipe (15) passes through the U-shaped plate (21).

4. The dioctyl terephthalate pressure filtration device according to claim 3, characterized in that: Two observation windows (22) are symmetrically opened on the outer wall of the work box (1).

5. The dioctyl terephthalate pressure filtration device according to claim 4, characterized in that: A stabilizing plate (23) is fixedly installed at the bottom of the working box (1), and the circulating liquid inlet pipe (15) passes through the stabilizing plate (23).

6. The dioctyl terephthalate pressure filtration device according to claim 5, characterized in that: Two auxiliary plates (24) are symmetrically fixed on the filter cartridge (4).

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