Filtering device for producing N, O-bis (trimethylsilyl) acetamide

Abstract

The utility model relates to a filtering device, in particular to a filtering device for producing N, O-bis (trimethylsilyl) acetamide, which comprises a lower tank body, an upper tank body, an electric push rod, an extrusion plate, a filtering plate and the like, an upper tank body is hinged to the top of the lower tank body through a hinge piece, an electric push rod, an extrusion plate and a filter plate are sequentially arranged on the inner side of the upper tank body from top to bottom, the movable end of the electric push rod is connected with the extrusion plate, the extrusion plate is in sliding contact fit with the inner wall of the upper tank body, and the upper tank body is communicated with an input pipe used for inputting N, O-bis (trimethylsilyl) acetamide. And the input pipe is arranged between the extrusion plate and the filter plate. The extrusion plate is driven by the electric push rod to apply vertical pressure to N, O-bis (trimethylsilyl) acetamide, materials are forced to pass through the vertical through holes of the filter plate, and the defect that traditional filtration depends on natural permeation is overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to a filter device, especially a filter device for producing N, O-bis (trimethylsilyl) acetamide. BACKGROUND

[0002] N, O-bis (trimethylsilyl) acetamide (BSA) is an important organosilicon compound, widely used in medicine, pesticide, polymer material and other fields, especially used as silylating agent and dehydrating agent in organic synthesis. In the production process of BSA, the solid-liquid separation or purification step after reaction is usually involved, but due to the high viscosity and easy agglomeration characteristics of BSA, the traditional filtering method (such as gravity filtration, vacuum filtration, etc.) has low efficiency, and filter hole plugging is easy to occur, resulting in long filtration period, frequent cleaning and affecting production efficiency.

[0003] Most of the existing filter devices adopt static filtering method, relying on the flowability of the material itself to pass through the filter screen, while viscous materials such as BSA are easy to form filter cake during the filtering process, hindering the subsequent filtration. In addition, the traditional filtering equipment has complex operation when cleaning filter residue or replacing filter material, affecting continuous production.

[0004] Therefore, there is an urgent need for a filter device that can efficiently filter viscous materials, prevent plugging and facilitate cleaning, in order to improve the production efficiency and product quality of BSA. SUMMARY

[0005] Technical scheme: a filter device for producing N, O-bis (trimethylsilyl) acetamide, comprising a lower tank body, an upper tank body, a hinge, an extrusion plate, a filter plate and an electric push rod, the upper tank body is hingedly connected to the top of the lower tank body by the hinge, the electric push rod, the extrusion plate and the filter plate are sequentially arranged from top to bottom on the inner side of the upper tank body, wherein the movable end of the electric push rod is connected with the extrusion plate, the extrusion plate is in sliding contact with the inner wall of the upper tank body, the upper tank body is connected with an input pipe for inputting N, O-bis (trimethylsilyl) acetamide, the input pipe is arranged between the extrusion plate and the filter plate, vertical through holes for passing N, O-bis (trimethylsilyl) acetamide are arrayed on the filter plate, the electric push rod drives the extrusion plate to move vertically up and down by its extension and retraction to extrude N, O-bis (trimethylsilyl) acetamide on the filter plate, so that its vertical through hole enters the lower tank body.

[0006] As an improvement of the above-mentioned scheme, the extrusion plate is provided with clamping rods at the bottom, which are evenly spaced and movably penetrate the vertical through holes on the filter plate.

[0007] As an improvement of the above-mentioned scheme, the clamping rod is divided into upper and lower segments, the diameters of the upper and lower segments are different, the diameter of the upper segment is smaller than that of the lower segment, and the diameter of the lower end is matched with the diameter of the vertical through hole.

[0008] As an improvement to the above scheme, an air pump is installed on the outside of the lower tank, and a transfer air ring is installed on the top outer wall and the lower outer wall of the upper tank. The transfer air ring on the top outer wall of the upper tank is connected to the inner cavity of the extrusion plate, and the transfer air ring installed on the lower outer wall of the upper tank is connected to the inner cavity of the filter plate. The air pump is connected to the transfer air ring through an air supply pipe.

[0009] As an improvement to the above solution, a circular plate is installed on the inner wall of the lower tank. The circular plate is located below the filter plate, and circular holes are arranged in an array on the circular plate. Filter bags can be detachably installed at the circular holes of the circular plate.

[0010] As an improvement to the above scheme, a guide ring is provided between the inner wall of the lower tank and the circular plate to guide the N,O-bis(trimethylsilyl)acetamide circular plate that will fall downward from the filter plate.

[0011] As an improvement to the above solution, the guide ring is set with an inclined surface, and its outer wall is in close contact with the inner wall of the lower tank.

[0012] As an improvement to the above solution, a limiting ring is provided at the circular hole of the circular plate to limit the position of the filter bag.

[0013] As an improvement to the above solution, a pull rod is rotatably installed on the limit ring.

[0014] The beneficial effects are as follows: 1. The electric push rod drives the extrusion plate to apply vertical pressure to N,O-bis(trimethylsilyl)acetamide, forcing the material to pass through the vertical through holes of the filter plate, overcoming the shortcomings of traditional filtration that relies on natural permeation; the reciprocating motion of the clamping rod forms dynamic shear force, which breaks up material agglomeration, reduces filter hole clogging, and improves the filtration rate.

[0015] 2. The air pump introduces gas into the inner cavity of the extrusion plate and filter plate. The airflow disturbance reduces material adhesion, prevents filter hole blockage, and extends the continuous operation time of the equipment.

[0016] 3. The filter bags on the circular plate are fixed by limit rings, and the pull rod structure allows for quick unlocking and replacement, reducing downtime and improving production efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional sectional view of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the upper tank of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the extrusion plate, filter plate, electric push rod, and clamping rod of this utility model.

[0021] Figure 5 This is a three-dimensional structural diagram of the circular plate, filter bag, and guide ring of this utility model.

[0022] Figure 6 This is a three-dimensional structural diagram of the filter bag and limiting ring pull rod of this utility model.

[0023] The following are the labels in the diagram: 1. Lower tank, 2. Upper tank, 21. Hinge, 3. Air pump, 4. Adapter ring, 5. Extrusion plate, 51. Filter plate, 6. Electric push rod, 7. Clamping rod, 8. Circular plate, 9. Limiting ring, 10. Filter bag, 11. Pull rod, 12. Guide ring. Detailed Implementation

[0024] 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.

[0025] Example: A filtration device for producing N,O-bis(trimethylsilyl)acetamide, such as Figures 1-6 As shown, the device includes a lower tank 1, an upper tank 2, a hinge 21, a pressing plate 5, a filter plate 51, and an electric push rod 6. The upper tank 2 is hinged to the top of the lower tank 1 via the hinge 21. The hinge 21 can be a hinge structure, allowing the upper tank 2 to be opened quickly, thus facilitating the cleaning of residue inside the tank and the inspection of the internal condition of the equipment. The electric push rod 6, the pressing plate 5, and the filter plate 51 are arranged sequentially from top to bottom on the inner side of the upper tank 2. The fixed end of the electric push rod 6 is fixed to the top of the upper tank 2, and the movable end is connected to the pressing plate 5. The pressing plate 51 slides in contact with the inner wall of the upper tank 2. The upper tank 2 can be vertically raised and lowered along its inner wall. The upper tank 2 is connected to an input pipe for inputting N,O-bis(trimethylsilyl)acetamide. The input pipe is located between the extrusion plate 5 and the filter plate 51. The lower part of the lower tank 1 is connected to an output pipe for outputting N,O-bis(trimethylsilyl)acetamide. The filter plate 51 has an array of vertical through holes for N,O-bis(trimethylsilyl)acetamide to pass through. The electric push rod 6 drives the extrusion plate 5 to move vertically up and down through its extension and retraction to extrude the N,O-bis(trimethylsilyl)acetamide on the filter plate 51 so that it enters the lower tank 1 through the vertical through holes.

[0026] like Figure 4As shown, clamping rods 7 are evenly spaced at the bottom of the extrusion plate 5. The clamping rods 7 move through the vertical through holes on the filter plate 51. The clamping rods 7 are divided into upper and lower sections with different diameters. The diameter of the upper section is smaller than that of the lower section. The diameter of the lower end matches the diameter of the vertical through hole. Matching the diameter of the lower section with the through hole can scrape off the residue on the hole wall and prevent blockage. At the same time, it can also temporarily close the through hole to form local pressure, thereby promoting the passage of materials.

[0027] like Figure 2 and Figure 3 As shown, an air pump 3 is installed on the outside of the lower tank 1, and a transfer air ring 4 is installed on the top outer wall and the lower outer wall of the upper tank 2. The transfer air ring 4 on the top outer wall of the upper tank 2 is connected to the inner cavity of the extrusion plate 5. The bottom of the extrusion plate 5 has a ventilation micro-hole. The transfer air ring 4 installed on the lower outer wall of the upper tank 2 is connected to the inner cavity of the filter plate 51. The filter plate 51 has a ventilation hole connected to the vertical through hole. The air pump 3 is connected to the transfer air ring 4 through the air supply pipe. When in use, the air pump 3 inflates the inner cavity of the extrusion plate 5 through the air supply pipe. The gas is sprayed out from the micro-hole at the bottom of the extrusion plate 5, disturbing the material and reducing its viscosity. At the same time, the gas enters the inner cavity of the filter plate 51 through the transfer air ring 4 and escapes from the side wall of the through hole, further preventing the vertical through hole on the filter plate 51 from being blocked.

[0028] like Figure 2 and Figure 5 As shown, a circular plate 8 is installed on the inner wall of the lower tank 1. The circular plate 8 is located below the filter plate 51. Circular holes are arrayed on the circular plate 8. Filter bags 10 are detachably installed at the circular holes of the circular plate 8. The output pipe is located below the filter bag 10. The filter bag 10 is used for further fine filtration of N,O-bis(trimethylsilyl)acetamide.

[0029] like Figure 2 and Figure 5 As shown, a guide ring 12 is provided between the inner wall of the lower tank 1 and the circular plate 8 to guide the N,O-bis(trimethylsilyl)acetamide falling from the filter plate 51 onto the circular plate 8. The guide ring 12 is set with an inclined surface, and its outer wall is in close contact with the inner wall of the lower tank 1. The inclined design of the guide ring 12 ensures that the filtered material flows to the center of the circular plate 8, avoids side wall residue, and improves the collection rate.

[0030] like Figure 5 and Figure 6 As shown, a limiting ring 9 is provided at the circular hole of the circular plate 8 to limit the filter bag 10. The limiting ring 9 is snapped and fixed to the circular plate 8, which facilitates disassembly and assembly, and at the same time ensures the stability of the filter bag 10 during use. A pull rod 11 is rotatably provided on the limiting ring 9. The pull rod 11 is a semi-circular pull ring, which realizes the quick separation of the limiting ring 9 from the circular plate 8.

[0031] Working Principle: During operation, N,O-bis(trimethylsilyl)acetamide enters the upper tank 2 through the input pipe and accumulates on the filter plate 51. The electric push rod 6 drives the extrusion plate 5 downwards, applying vertical pressure to the material. When the upper end of the clamping rod 7 moves down into the vertical through-hole, the material on the filter plate 51 can pass through the gap between the vertical through-hole and the clamping rod 7, thus moving to the bottom of the filter plate 51. The extrusion plate 5 continues to press down, forcing the material through the vertical through-hole into the lower tank 1. The reciprocating motion (lifting and lowering) of the clamping rod 7 creates dynamic shearing force, breaking up material agglomeration and improving filtration efficiency. The air pump 3 inflates the inner cavity of the extrusion plate 5 through the air supply pipe. The gas is ejected from the micro-holes at the bottom of the extrusion plate 5, disturbing the material and reducing its viscosity. Simultaneously, the gas enters the inner cavity of the filter plate 51 through the transition air ring 4 and escapes from the side wall of the through-hole, further preventing clogging of the channels. Material passing through filter plate 51 falls to guide ring 12, and then enters filter bag 10 on circular plate 8 for fine filtration.

[0032] When cleaning is required, the upper tank 2 and lower tank 1 are separated by the hinge 21, allowing for easy cleaning of residues on the filter plate 51. After removing the filter plate 51, rotate the pull rod 11 90 degrees to... Figure 6 In the state shown, pull the lever 11 upwards. The lever 11 moves the fiber ring upwards, thereby releasing the restriction on the filter bag 10. At this time, the filter bag 10 can be taken out, and the residue inside the filter bag 10 can be cleaned or the filter bag 10 can be replaced.

[0033] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Therefore, all equivalent changes made based on the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A filtration device for producing N,O-bis(trimethylsilyl)acetamide, comprising a lower tank (1) hinged to an upper tank (2) at its top by a hinge (21), characterized in that, An electric push rod (6), an extrusion plate (5), and a filter plate (51) are arranged sequentially from top to bottom on the inner side of the upper tank (2). The movable end of the electric push rod (6) is connected to the extrusion plate (5). The extrusion plate (5) slides in contact with the inner wall of the upper tank (2). The upper tank (2) is connected to an input pipe for inputting N,O-bis(trimethylsilyl)acetamide. The input pipe is located between the extrusion plate (5) and the filter plate (51). The filter plate (51) has an array of vertical through holes for N,O-bis(trimethylsilyl)acetamide to pass through. The electric push rod (6) drives the extrusion plate (5) to move vertically up and down through its extension and retraction to extrude the N,O-bis(trimethylsilyl)acetamide on the filter plate (51) so that it enters the lower tank (1) through the vertical through holes.

2. The filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 1, characterized in that, The bottom of the extrusion plate (5) is evenly spaced with clamping rods (7), which move through the vertical through holes on the filter plate (51).

3. The filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 2, characterized in that, The clamp rod (7) is divided into upper and lower sections. The upper and lower sections of the clamp rod (7) have different diameters. The diameter of the upper section is smaller than that of the lower section. The diameter of the lower end is matched with the diameter of the vertical through hole.

4. The filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 3, characterized in that, An air pump (3) is installed on the outside of the lower tank (1). A transfer air ring (4) is installed on the top outer wall and the lower outer wall of the upper tank (2). The transfer air ring (4) on the top outer wall of the upper tank (2) is connected to the inner cavity of the extrusion plate (5). The transfer air ring (4) installed on the lower outer wall of the upper tank (2) is connected to the inner cavity of the filter plate (51). The air pump (3) is connected to the transfer air ring (4) through the air supply pipe.

5. A filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 4, characterized in that, A circular plate (8) is installed on the inner wall of the lower tank (1). The circular plate (8) is located below the filter plate (51). Circular holes are arranged in an array on the circular plate (8). Filter bags (10) are detachably installed at the circular holes of the circular plate (8).

6. The filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 5, characterized in that, A guide ring (12) is provided between the inner wall of the lower tank (1) and the circular plate (8) for guiding the N,O-bis(trimethylsilyl)acetamide circular plate (8) that will fall downward from the filter plate (51).

7. A filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 6, characterized in that, The guide ring (12) is set with an inclined surface, and its outer wall is in close contact with the inner wall of the lower tank (1).

8. A filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 7, characterized in that, A limiting ring (9) is provided at the circular hole of the circular plate (8) to limit the filter bag (10).

9. A filtration device for producing N,O-bis(trimethylsilyl)acetamide as described in claim 8, characterized in that, A pull rod (11) is rotatably mounted on the limiting ring (9).

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