Novel equipment for separating durene through freezing crystallization

Abstract

The utility model discloses novel equipment for separating durene through freezing crystallization, which relates to the field of durene preparation and comprises a workbench, the inner side of the workbench is connected with a pressure plate through an air cylinder, and the inner side of the workbench is further provided with a collecting box and a lifting mechanism arranged on the pressure plate and the collecting box in a sliding manner through a sliding rail; the lifting mechanism comprises a lifting unit and a filtering unit. By arranging the lifting mechanism, the collecting box and the filter screen box can be moved to the position below the pressing disc through the guide rail, materials in the filter screen box are extruded and squeezed through the pressing disc, solid and liquid of the materials are separated, the separated liquid is transferred into the collecting box through the filter screen box, separation is completed, and after the pressing disc is reset, the materials can be conveniently collected. Supporting blocks distributed on the two sides are in butt joint with butt joint blocks, the filter screen box is lifted to be separated from the collecting box, the materials can be conveniently separated from the filter screen box under the gravity effect, follow-up squeezing work is facilitated, and the working efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of mesitylene preparation, specifically a novel device for the freeze crystallization and separation of mesitylene. Background Technology

[0002] my country has abundant C9+ reforming resources, with an annual production capacity of over 600 kt of reformed C9+ aromatics. Mesitylene accounts for about 8% of C9+ aromatics and is a very important fine chemical raw material, mainly used to produce pyromellitic dianhydride (PMDA, or pyromellitic anhydride for short), which is then used to produce polyimide resins.

[0003] C9+ feedstock is separated into different grades of solvent oil by a distillation column, and a mesitylene enriched solution is obtained. The mesitylene enriched solution is then crystallized and refined to obtain the mesitylene product. The mesitylene enriched solution is generally obtained by pressing the feedstock with a press to separate the solid and liquid components. The separated liquid is then crystallized and allowed to stand. Based on this, in order to facilitate the collection of the mesitylene enriched solution, this utility model proposes a novel device for freezing crystallization and separation of mesitylene. Utility Model Content

[0004] The purpose of this invention is to provide a novel device for the cryogenic crystallization and separation of mesitylene in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel freezing crystallization and separation device for mesitylene, comprising a worktable, a pressure plate connected to the inner side of the worktable via a cylinder, a collection box slidably mounted on the inner side of the worktable via a slide rail, and a lifting mechanism disposed on the pressure plate and the collection box;

[0006] The lifting mechanism includes a lifting unit and a filtering unit;

[0007] The filtration unit is used to separate solids and liquids in the material;

[0008] The lifting unit is used to provide lifting force for the movement of the filter box.

[0009] As a further improvement of this utility model: the filtration unit includes a filter box and a docking block;

[0010] The filter box is placed inside the collection box and is used to filter and separate liquids and solids in the material.

[0011] The docking block is fixed to the outer wall of the filter box, and the docking block is used to receive the lifting support force from the support block.

[0012] As a further embodiment of this utility model: the lifting unit includes a fixing rod, a support block, a positioning rod, and a spring;

[0013] The fixing rod is fixed to the outer wall of the shaft of the pressure plate, and the fixing rod is used to move as the pressure plate moves;

[0014] The support block is axially slidably mounted on the inner side of the support block and extends to the outer side of the support block. The support block is used to provide support for the lifting of the filter box.

[0015] The positioning rod is fixed to the end of the support block and extends to the inner wall of the fixing rod. The positioning rod is used to provide positioning for the movement of the support block.

[0016] The two ends of the spring are respectively snapped onto the outer wall of the support block and the inner side of the fixing rod, and the spring is used to provide the support block with compressive elastic force at all times.

[0017] As a further improvement of this utility model: the outer wall of the support block is generally L-shaped, and the bottom of the support block is inclined.

[0018] As a further improvement of this utility model, the number of the docking blocks is set to two, and the two docking blocks are symmetrically distributed on the outer wall of the filter box.

[0019] As a further improvement of this utility model: the inner side of the docking block is formed with a hole or groove for the vertical rod at the top of the support block to enter, and the position of the docking block coincides with the vertical movement trajectory of the inclined surface at the bottom of the support block.

[0020] As a further improvement of this utility model: the outer wall of the fixing rod is generally U-shaped, and the inner wall of the fixing rod is formed with a sliding groove for axial movement of the positioning rod.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] By setting up a lifting mechanism, the collection box and filter box can be moved to the bottom of the pressure plate via guide rails. The pressure plate squeezes and presses the material in the filter box, separating the solid and liquid components. The separated liquid is transferred to the collection box through the filter box, completing the separation. Afterward, as the pressure plate resets, the filter box is lifted and separated from the collection box by connecting blocks on both sides. This allows the material to separate from the filter box under gravity, facilitating subsequent pressing work and further improving work efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a partial enlarged view of point A of this utility model;

[0025] Figure 3This is a schematic diagram of the lifting mechanism of this utility model.

[0026] In the diagram: 1. Workbench; 2. Pressure plate; 3. Collection box; 4. Lifting mechanism; 401. Filter box; 402. Connecting block; 403. Fixing rod; 404. Support block; 405. Positioning rod; 406. Spring. 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.

[0028] Please see Figures 1-3 In this embodiment of the present invention, a novel device for freezing crystallization and separating mesitylene includes a workbench 1, a pressure plate 2 connected to the inner side of the workbench 1 via a cylinder, a collection box 3 slidably mounted on the inner side of the workbench 1 via a slide rail, and a lifting mechanism 4 disposed on the pressure plate 2 and the collection box 3.

[0029] The lifting mechanism 4 includes a lifting unit and a filtering unit;

[0030] The filtration unit is used to separate solids and liquids from materials;

[0031] The lifting unit is used to provide lifting force for the movement of the filter box 401;

[0032] The filtration unit includes a filter box 401 and a docking block 402;

[0033] The filter box 401 is placed inside the collection box 3. The filter box 401 is used to filter and separate the liquid and solid in the material.

[0034] The docking block 402 is fixed to the outer wall of the filter box 401, and the docking block 402 is used to receive the lifting support force from the support block 404;

[0035] The lifting unit includes a fixed rod 403, a support block 404, a positioning rod 405, and a spring 406;

[0036] The fixing rod 403 is fixed to the outer wall of the shaft of the pressure plate 2, and the fixing rod 403 is used to move with the movement of the pressure plate 2;

[0037] The support block 404 is axially slidably mounted on the inner side of the support block 404 and extends to the outer side of the support block 404. The support block 404 is used to provide support for the lifting of the filter box 401.

[0038] The positioning rod 405 is fixed to the end of the support block 404 and extends to the inner wall of the fixing rod 403. The positioning rod 405 is used to provide positioning for the movement of the support block 404.

[0039] The two ends of the spring 406 are respectively snapped onto the outer wall of the support block 404 and the inner side of the fixing rod 403. The spring 406 is used to provide the support block 404 with compressive elastic force at all times.

[0040] In this embodiment: the material to be separated into solid and liquid is placed inside the filter box 401. By manually applying a pushing force to the collection box 3, the collection box 3 and the filter box 401 are moved to the bottom of the pressure plate 2. The pressure plate 2 is pushed downward by activating the cylinder connected to the pressure plate 2. The downward-moving pressure plate 2 enters the inside of the filter box 401 to squeeze and press the material, so that the liquid in the material inside the filter box 401 overflows through the filter holes of the filter box 401 into the inside of the collection box 3 and is discharged and collected through the discharge port at one end of the collection box 3.

[0041] As the pressure plate 2 moves downward, the fixing rod 403, which is fixed to the outer wall of the shaft of the pressure plate 2, moves along with the pressure plate 2, causing the support blocks 404 distributed at both ends of the fixing rod 403 to move synchronously. During the downward movement of the support blocks 404, they mate with the docking blocks 402 on both sides of the filter box 401. The inclined surface of the support block 404 contacts the outer wall of the docking block 402, giving the support block 404 a squeezing force. The force-bearing support block 404 will drive the positioning rod 405 to move axially along the inner side of the fixing rod 403 and give the spring 406 a squeezing force until the support block 404 passes the docking block 402. Then the support block 404 will also be under the action of the spring 406. When the reset is performed, the vertical rod at the top of the reset support block 404 will align with the inner groove of the docking block 402. Then, when the pressing plate 2 moves upward to reset after pressing is completed, the vertical rod at the top of the support block 404 will insert into the groove of the docking block 402 to lift the filter box 401 and the docking block 402. The lifted filter box 401 will separate from the collection box 3, which facilitates the separation of solid materials inside the filter box 401 and further improves work efficiency. Then, an upward lifting force is applied to the filter box 401, causing the filter box 401 to drive the docking block 402 to separate from the vertical rod at the top of the support block 404, which facilitates the quick removal of the filter box 401.

[0042] Please refer to this carefully. Figures 1-3The outer wall of the support block 404 is generally L-shaped, and the bottom of the support block 404 is inclined. There are two docking blocks 402, which are symmetrically distributed on the outer wall of the filter box 401. The inner side of the docking block 402 is formed with a slot for the vertical rod at the top of the support block 404 to enter. The position of the docking block 402 coincides with the vertical movement trajectory of the inclined surface at the bottom of the support block 404. The outer wall of the fixing rod 403 is generally U-shaped, and the inner wall of the fixing rod 403 is formed with a groove for the axial movement of the positioning rod 405.

[0043] In this embodiment: With this structure, during the pressing of materials, when the bottom inclined surface of the support block 404 contacts the outer wall of the docking block 402, the two docking blocks 402 remain stationary and provide the two support blocks 404 with a squeezing force, so that the filter box 401 itself remains stationary and provides the support blocks 404 with a pushing force that moves them away from each other.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel device for freezing and crystallizing separating durene, comprising a workbench (1), a pressure plate (2) is connected to the inner side of the workbench (1) through a gas cylinder, and a collection box (3) is slidingly installed on the inner side of the workbench (1) through a sliding rail, characterized in that, Lifting mechanism (4) is installed on the pressure plate (2) and the collection box (3); The lifting mechanism (4) includes a lifting unit and a filtering unit; The filtration unit is used to separate solids and liquids in the material; The lifting unit is used to provide lifting force for the movement of the filter box (401).

2. A novel apparatus for the separation of durene by freeze crystallization as claimed in claim 1, wherein, The filtration unit includes a filter box (401) and a docking block (402). The filter box (401) is placed inside the collection box (3), and the filter box (401) is used to filter and separate the liquid and solid in the material; The docking block (402) is fixed to the outer wall of the filter box (401), and the docking block (402) is used to receive the lifting support force from the support block (404).

3. The novel equipment for cryogenic crystallization and separation of mesitylene according to claim 1, characterized in that, The lifting unit includes a fixed rod (403), a support block (404), a positioning rod (405), and a spring (406). The fixing rod (403) is fixed to the outer wall of the shaft of the pressure plate (2), and the fixing rod (403) is used to move with the movement of the pressure plate (2); The support block (404) is axially slidably mounted on the inner side of the support block (404) and extends to the outside of the support block (404), and the support block (404) is used to provide support for the lifting of the filter box (401); The positioning rod (405) is fixed to the end of the support block (404) and extends to the inner wall of the fixing rod (403). The positioning rod (405) is used to provide positioning for the movement of the support block (404). The two ends of the spring (406) are respectively snapped onto the outer wall of the support block (404) and the inner side of the fixing rod (403). The spring (406) is used to provide the support block (404) with compressive elastic force at all times.

4. A novel apparatus for separating durene by freeze crystallization as claimed in claim 3, wherein, The outer wall of the support block (404) is in an "L" shape, and the bottom of the support block (404) is inclined.

5. A novel apparatus for separating durene by freeze crystallization as claimed in claim 2, wherein, There are two docking blocks (402), and the two docking blocks (402) are symmetrically distributed on the outer wall of the filter box (401).

6. A novel apparatus for separating durene by freeze crystallization as claimed in claim 2, wherein, The inner side of the docking block (402) is formed with a hole or groove for the vertical rod at the top of the support block (404) to enter. The position of the docking block (402) coincides with the vertical movement trajectory of the bottom inclined surface of the support block (404).

7. A novel apparatus for separating durene by freeze crystallization as claimed in claim 3, wherein, The outer wall of the fixing rod (403) is in the shape of a "U" and the inner wall of the fixing rod (403) is formed with a groove for the axial movement of the positioning rod (405).

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