Vinyl acetate fluidized bed rectification carbon powder filtering and automatic pressing device

Abstract

The utility model provides a vinyl acetate fluidized bed rectification carbon powder filtering and automatic material pressing device which comprises a barrel body, a tubular filter is fixed in the barrel body, and a slag discharging opening is formed in the bottom of the barrel body. A purging gas inlet connected with a purging gas input pipeline and a filtered clear liquid outlet connected with a filtered clear liquid output pipeline are formed in the cylinder body above the filter, and a material pressing gas inlet connected with a material pressing gas input pipeline and a reaction liquid inlet connected with a reaction liquid input pipeline are formed in the cylinder body below the filter; electromagnetic valves are arranged on the purging gas input pipeline, the filtered clear liquid output pipeline, the material pressing gas input pipeline and the reaction liquid input pipeline; and the electromagnetic valves are connected with an information output end of the controller. The utility model provides a vinyl acetate fluidized bed rectification carbon powder filtering and automatic pressing device, which improves the filtering effect, automatically presses materials and improves the operation environment.

Description

Technical Field

[0001] The present application belongs to the field of vinyl acetate preparation, and specifically relates to a vinyl acetate fluidized bed distillation carbon powder filtering and automatic pressing device. Background Art

[0002] Polyvinyl alcohol (PVA), as an important chemical raw material, is widely used in various industries, including industry, agriculture, fisheries, transportation, and medicine. The production process of PVA involves the following: acetylene and acetic acid are used as raw materials to produce vinyl acetate. Under certain conditions, vinyl acetate undergoes polymerization to produce polyvinyl acetate, which is then subjected to alcoholysis to produce polyvinyl alcohol. Acetylene gas and acetic acid vapor react in a fluidized bed reactor to produce vinyl acetate. Acetic acid and vinyl acetate are then separated by distillation. The synthesis of vinyl acetate from acetylene gas and acetic acid vapor uses zinc acetate adsorbed on activated carbon as a catalyst. During the synthesis process, some activated carbon powder is carried out of the fluidized bed reactor with the reaction gases. Larger particles of activated carbon are removed through internal cyclonic separation and high-efficiency cyclone separators, while smaller particles follow the acetic acid vapor into a separation tower, where the acetic acid vapor condenses and the powder enters the reaction solution. The black reaction liquid, which contains fines, requires filtration to separate and remove the carbon powder before distillation can proceed to obtain the vinyl acetate product. Direct distillation without filtration significantly impacts the stability of the distillation column and the proper functioning of downstream systems. Using a distillation filter to filter the reaction liquid involves a filtration and pressing process. The filter utilizes a 316L stainless steel filter mesh. During the filtration process, the carbon powder settles on the surface of the mesh, forming a filter cake. After filtration, the filter cake is pressed, where nitrogen is introduced to press the filter cake, separating the carbon powder from the acetic acid. The acetic acid is then recovered and the carbon powder residue is discharged from the filter. Currently used distillation filters have poor filtration accuracy and cannot fully filter the carbon powder. Corrosion on the filter plates results in large mesh openings, resulting in poor filtration performance over time. Excessive carbon powder frequently clogs the distillation reboiler tubes, impairing heat exchange. Pressing the existing filter requires workers to manually open the nitrogen valve. During the discharge process, the carbon powder residue carries a small amount of acetic acid, resulting in a strong acetic acid odor in the surrounding environment. Workers must wear full-face masks, which hinders their operation. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides a vinyl acetate fluidized bed distillation carbon powder filtering and automatic pressing device, which improves the filtering effect, automatically presses the material, and improves the operating environment.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A device for filtering and automatically pressing carbon powder for distillation of vinyl acetate in a fluidized bed, comprising a cylinder, a tubular filter fixed inside the cylinder for filtering a reaction liquid, a slag discharge port provided at the bottom of the cylinder, a purge gas inlet connected to a purge gas input pipe and a filtered clear liquid outlet connected to a filtered clear liquid output pipe provided on the cylinder above the filter, a pressurized gas inlet connected to a pressurized gas input pipe and a reaction liquid inlet connected to a reaction liquid input pipe provided on the cylinder below the filter, the reaction liquid entering the cylinder passes through the filter from bottom to top, the filtered clear liquid overflows from the top of the filter, enters the filtered clear liquid output pipe through the filtered clear liquid outlet and is transported to the next process, and electromagnetic valves are provided on the purge gas input pipe, the filtered clear liquid output pipe, the pressurized gas input pipe and the reaction liquid input pipe, and the electromagnetic valves are connected to the information output end of a controller.

[0006] Furthermore, the filter includes a flower plate fixedly connected to the inner wall of the cylinder and multiple columns of filter elements fixed on the flower plate. The flower plate is a circular plate. The material of the flower plate can be, for example, 316L stainless steel. The outer periphery of the flower plate is seamlessly connected to the inner wall of the cylinder. The flower plate and the inner wall of the cylinder are preferably seamlessly welded to prevent the reaction liquid from entering the top of the flower plate through the gap between the flower plate and the cylinder. A plurality of threaded through holes are opened on the flower plate, each through hole is connected to a filter element, and the shape of the through hole is consistent with the shape of the cross section of the filter element.

[0007] Furthermore, the filter element is connected to the bottom of the flower plate. The filter element is a slender tubular body with one end closed and the other end open. One end of the filter element opening forms an external thread, which matches the through hole thread. One end of the filter element opening is coaxially threaded with the through hole.

[0008] Furthermore, the filter element is a PE sintered filter element, the pores of the filter element are 50-100 μm, 80-90 filter elements are arranged on each square meter of the flower plate, the filter element height can be, for example, 1 / 2-4 / 5 of the cylinder height, the filter element inner diameter can be, for example, 10-20 mm, preferably about 15 mm, the filter element outer diameter can be, for example, 20-50 mm, preferably about 30 mm, the filtered liquid passes through the filter element from the outside to the inside, the carbon powder cannot pass through the filter holes, is retained on the outer surface of the filter element and accumulates to form a filter cake layer, which effectively filters the reaction liquid. When the filter cake layer reaches a certain thickness, the filtration resistance increases significantly, resulting in an increase in the pressure difference between the filtered liquid outlet pressure and the filter body, and the filter needs to be discharged and cleaned.

[0009] Furthermore, a filter clear liquid pressure sensor is provided at the filter clear liquid outlet for detecting the liquid pressure at the filter clear liquid outlet, and a reaction liquid pressure sensor is provided at the reaction liquid inlet for detecting the pressure of the reaction liquid entering the cylinder. Both the filter clear liquid pressure sensor and the reaction liquid pressure sensor are connected to the information input end of the controller, and the pressure difference measured by the filter clear liquid pressure sensor and the reaction liquid pressure sensor is used to determine whether to press the material, discharge the slag and clean the filter element.

[0010] Furthermore, an online acid gas detector is provided on the filtered liquid output pipeline, and the acid gas detector is connected to the information input terminal of the controller. When the filter is pressing the material, the acid gas detector is used to monitor the acetic acid carried in the pressing gas in real time.

[0011] Furthermore, the solenoid valve includes a first solenoid valve arranged on the purge gas input pipeline, a second solenoid valve arranged on the filtered clear liquid output pipeline, a third solenoid valve arranged on the pressurized gas input pipeline and a fourth solenoid valve arranged on the reaction liquid input pipeline.

[0012] Furthermore, the cylinder body includes a cylinder cover and a cylinder body, the cylinder cover and the cylinder body are connected by a flange ring, the cylinder body includes a cylindrical section and an inverted conical section connected to the bottom of the cylindrical section, the bottom end of the inverted conical section is connected to the slag discharge port, preferably, the pressing gas inlet is arranged in the inverted conical section.

[0013] Furthermore, a cleaning liquid inlet is opened on the cylinder above the filter, and the cleaning liquid inlet is connected to a cleaning liquid input pipe. The cleaning liquid can be, for example, water, and a fifth solenoid valve is provided on the cleaning liquid input pipe.

[0014] Furthermore, the reaction liquid input pipe between the fourth solenoid valve and the cylinder is divided into a first branch and a second branch in sequence along the reaction liquid conveying direction, wherein the first branch is used to reflux and empty the reaction liquid in the cylinder, and the second branch is used as an output pipe for cleaning waste liquid to discharge the cleaning waste liquid. The cleaning waste liquid contains a small amount of acid and carbon powder, and direct discharge will pollute the environment. Therefore, it is discharged to a designated location through the second branch. A sixth solenoid valve is provided on the first branch, and a seventh solenoid valve is provided on the second branch. The sixth solenoid valve and the seventh solenoid valve are both connected to the controller.

[0015] Furthermore, the slag discharge port is provided with a slag discharge valve for controlling the output of the carbon powder slag. The slag discharge valve is connected to the information output end of the controller. The slag discharge valve can be, for example, a DN500 electric clamp-type butterfly valve, which is connected to the slag discharge port through a flange. When the slag discharge valve is closed, it is used to seal the slag discharge port to prevent the reaction liquid from leaking from the slag discharge port. When it is opened, it is used to discharge the carbon powder slag blown down from the filter element. During slag discharge, the bottom of the slag discharge port is connected to a special transport vehicle to directly discharge the carbon powder slag to the transport vehicle.

[0016] Furthermore, the controller is a programmable logic controller, such as a PLC or DCS, which is a type of programmable memory used to store programs internally, execute user-oriented instructions such as logical operations, sequential control, timing, counting and arithmetic operations, and control various types of machinery or production processes through digital or analog input / output. In essence, it is a computer dedicated to industrial control, and its hardware structure is basically the same as that of a microcomputer. It is generally used for data processing and receiving and outputting instructions to achieve central control. The control circuit of the controller can be implemented by simple programming by technicians in this field, which is common knowledge in this field. The present invention is mainly used to protect mechanical devices, so this application will no longer explain the control method and circuit connection in detail.

[0017] Beneficial effects of the utility model

[0018] The utility model discloses a filtration and automatic pressing device for carbon powder in a vinyl acetate fluidized bed distillation, wherein a flower plate and multiple rows of PE sintered filter elements fixed on the flower plate are arranged in a cylinder body. After the reaction liquid enters the cylinder body, it passes through the filter element from bottom to top, and the filtered clear liquid overflows into the space above the flower plate and is output from the filtered clear liquid output pipe. The PE sintered filter element effectively filters the reaction liquid, greatly reducing the carbon powder content in the filtered clear liquid, avoiding frequent blockage of the distillation reboiler tubes, extending the service life of the reboiler, and reducing energy consumption. The electromagnetic valve, the acid gas detector, the filtered clear liquid pressure sensor, and the reaction liquid pressure sensor are connected to the controller to realize automatic control of the entire device. The controller is remotely operated, and since personnel no longer need to enter the site, the harm caused by hazardous chemicals to personnel and the labor intensity are reduced, thereby essentially improving the safety of the operation. The cleaning liquid input pipe and the second branch pipe are provided to perform closed cleaning of the entire device, thereby reducing pollution to the environment and improving the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a plan view of a device for filtering and automatically pressing carbon powder for vinyl acetate fluidized bed distillation according to the present invention.

[0020] Figure 2 This is a three-dimensional diagram of a device for filtering and automatically pressing carbon powder for vinyl acetate fluidized bed distillation according to the present invention.

[0021] Figure 3 The utility model is a top view of a device for filtering and automatically pressing carbon powder for vinyl acetate fluidized bed distillation.

[0022] Figure 4 for Figure 3 A sectional perspective view in the AA direction.

[0023] Figure 5 Schematic diagram of the filter element structure.

[0024] Figure 6 This is a control block diagram of a vinyl acetate fluidized bed distillation carbon powder filtering and automatic pressing device of the utility model.

[0025] Reference numerals:

[0026] 1-cylinder body, 101-cylinder cover, 102-cylinder body, 103-flange ring, 2-filter, 201-flower plate, 202-filter element, 2021-external thread, 3-slag discharge port, 4-purge gas input pipeline, 5-filtered liquid output pipeline, 6-pressing gas input pipeline, 7-reaction liquid input pipeline, 8-controller, 9-filtered liquid pressure sensor, 10-reaction liquid pressure sensor, 11-acid gas detector, 12-first solenoid valve, 13-second solenoid valve, 14-third solenoid valve, 15-fourth solenoid valve, 16-cleaning liquid input pipeline, 17-fifth solenoid valve, 18-first branch pipe, 20-second branch pipe, 21-sixth solenoid valve, 23-seventh solenoid valve, 24-slag discharge valve. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0028] like Figure 1-6 As shown, a device for filtering and automatically pressing carbon powder for fluidized bed distillation of vinyl acetate is provided, which includes a cylinder 1, a tubular filter 2 for filtering the reaction liquid is fixed inside the cylinder 1, a slag discharge port 3 is provided at the bottom of the cylinder 1, a purge gas inlet connected to a purge gas input pipe 4 and a filtered clear liquid outlet connected to a filtered clear liquid output pipe 5 are opened in the cylinder 1 above the filter 2, a pressing gas inlet connected to a pressing gas input pipe 6 and a reaction liquid inlet connected to a reaction liquid input pipe 7 are opened in the cylinder 1 below the filter 2, after the reaction liquid enters the cylinder 1, passes through the filter 2 from bottom to top, the filtered clear liquid overflows from the top of the filter 2, enters the filtered clear liquid output pipe 5 through the filtered clear liquid outlet and is transported to the next process, and solenoid valves are provided on the purge gas input pipe 4, the filtered clear liquid output pipe 5, the pressing gas input pipe 6 and the reaction liquid input pipe 7, which are connected to the information output end of the controller 8.

[0029] The filter 2 includes a flower plate 201 fixedly connected to the inner wall of the cylinder 1 and a plurality of columns of filter elements 202 fixed on the flower plate 201. The flower plate 201 is a circular plate. The material of the flower plate 201 can be, for example, 316L stainless steel. The outer periphery of the flower plate 201 is seamlessly connected to the inner wall of the cylinder 1. The flower plate 201 and the inner wall of the cylinder 1 are preferably seamlessly welded to prevent the reaction liquid from entering the top of the flower plate 201 through the gap between the flower plate 201 and the cylinder 1. A plurality of threaded through holes are opened on the flower plate 201, each of which is connected to a filter element 202. The shape of the through hole is consistent with the shape of the cross section of the filter element 202.

[0030] The filter element 202 is connected to the bottom of the flower plate 201. The filter element 202 is a slender tubular body with one end closed and the other end open. The open end of the filter element 202 forms an external thread 2021, which matches the through hole thread. The open end of the filter element 202 is coaxially threaded with the through hole.

[0031] The filter element 202 is a PE sintered filter element. The pores of the filter element 202 are 50-100 μm. 80-90 filter elements 202 are arranged on each square meter of the flower plate 201. The height of the filter element 202 can be, for example, 1 / 2-4 / 5 of the height of the cylinder 1. The inner diameter of the filter element 202 can be, for example, 10-20 mm, preferably about 15 mm. The outer diameter of the filter element 202 can be, for example, 20-50 mm, preferably about 30 mm. The filtered liquid passes through the filter element 202 from the outside to the inside. The carbon powder cannot pass through the filter holes and is retained on the outer surface of the filter element 202 and accumulates to form a filter cake layer, which effectively filters the reaction liquid. When the filter cake layer reaches a certain thickness, the filtration resistance increases significantly, resulting in an increase in the pressure difference between the outlet pressure of the filtered liquid and the pressure of the filter 2 body, and the filter 2 needs to be discharged and cleaned.

[0032] A filter clear liquid pressure sensor 9 is provided at the filter clear liquid outlet for detecting the liquid pressure at the filter clear liquid outlet, and a reaction liquid pressure sensor 10 is provided at the reaction liquid inlet for detecting the pressure of the reaction liquid entering the cylinder 1. The filter clear liquid pressure sensor 9 and the reaction liquid pressure sensor 10 are both connected to the information input end of the controller 8. The pressure difference measured by the filter clear liquid pressure sensor 9 and the reaction liquid pressure sensor 10 is used to determine whether the filter element 202 is to be pressed, discharged and cleaned.

[0033] An online acid gas detector 11 is provided on the filtered liquid output pipeline 5. The acid gas detector 11 is connected to the information input terminal of the controller 8. When the filter 2 is pressing the material, the acid gas detector 11 is used to monitor the acetic acid carried in the pressing gas in real time.

[0034] The solenoid valves include a first solenoid valve 12 provided on the purge gas input pipeline 4 , a second solenoid valve 13 provided on the filtered liquid output pipeline 5 , a third solenoid valve 14 provided on the pressurized gas input pipeline 6 , and a fourth solenoid valve 15 provided on the reaction liquid input pipeline 7 .

[0035] The cylinder body 1 includes a cylinder cover 101 and a cylinder body 102. The cylinder cover 101 and the cylinder body 102 are connected by a flange ring 103. The cylinder body 102 includes a cylindrical section and an inverted conical section connected to the bottom of the cylindrical section. The bottom end of the inverted conical section is connected to the slag discharge port 3. Preferably, the pressing gas inlet is arranged in the inverted conical section.

[0036] A cleaning liquid inlet is provided on the cylinder 1 above the filter 2 , and the cleaning liquid inlet is connected to a cleaning liquid input pipe 16 . The cleaning liquid may be, for example, water, and a fifth solenoid valve 17 is provided on the cleaning liquid input pipe 16 .

[0037] The reaction liquid input pipe 7 between the fourth solenoid valve 15 and the cylinder 1 is divided into a first branch pipe 18 and a second branch pipe 20 in sequence along the reaction liquid conveying direction, wherein the first branch pipe 18 is used to reflux and empty the reaction liquid in the cylinder 1, and the second branch pipe 20 is used as an output pipe for cleaning waste liquid to discharge the cleaning waste liquid. The cleaning waste liquid contains a small amount of acid and carbon powder, and direct discharge will pollute the environment. Therefore, it is discharged to a designated location through the second branch pipe 20. A sixth solenoid valve 21 is provided on the first branch pipe 18, and a seventh solenoid valve 23 is provided on the second branch pipe 20. The sixth solenoid valve 21 and the seventh solenoid valve 23 are both connected to the controller 8.

[0038] The slag discharge port 3 is provided with a slag discharge valve 24 for controlling the output of the carbon powder slag. The slag discharge valve 24 is connected to the information output end of the controller 8. The slag discharge valve 24 can be, for example, a DN500 electric clamp-type butterfly valve, which is connected to the slag discharge port 3 through a flange. When the slag discharge valve 24 is closed, it is used to seal the slag discharge port 3 to prevent the reaction liquid from leaking from the slag discharge port 3. When it is opened, it is used to discharge the carbon powder slag blown down from the filter element 202. During slag discharge, the bottom of the slag discharge port 3 is connected to a special transport vehicle to directly discharge the carbon powder slag to the transport vehicle.

[0039] The controller 8 is a programmable logic controller, such as a PLC or DCS, which is a type of programmable memory used to store programs internally, execute user-oriented instructions such as logical operations, sequential control, timing, counting and arithmetic operations, and control various types of machinery or production processes through digital or analog input / output. In essence, it is a computer dedicated to industrial control. Its hardware structure is basically the same as that of a microcomputer. It is generally used for data processing and receiving and outputting instructions to achieve central control. The control circuit of the controller 8 can be implemented by simple programming by technicians in this field. It is common knowledge in this field, and the present invention is mainly used to protect mechanical devices, so this application will no longer explain the control method and circuit connection in detail. Example

[0040] Before using the vinyl acetate fluidized bed distillation carbon powder filtering and automatic pressing device of the present application, all valves and instruments are in a closed state.

[0041] The specific operation process of a vinyl acetate fluidized bed distillation carbon powder filtering and automatic pressing device:

[0042] (1) The controller 8 interlocks and opens the fourth solenoid valve 15, the second solenoid valve 13, the filtered liquid pressure sensor 9 and the reaction liquid pressure sensor 10, and the reaction liquid (the reaction liquid contains about 95wt% acetic acid, 5 wt% activated carbon powder) is transported to the cylinder 1 through the reaction liquid input pipe 7. After entering the cylinder 1, the reaction liquid passes through the filter element 202 from bottom to top. The filtered clear liquid (carbon powder content is about 0.05wt%) overflows from the top of the flower plate 201, enters the filtered clear liquid output pipe 5 through the filtered clear liquid outlet and is transported to the next process. The carbon powder cannot pass through the filter holes and is trapped on the outer surface of the filter element 202 and accumulates to form a filter cake layer, which effectively filters the reaction liquid. The pressure values ​​measured by the filtered clear liquid pressure sensor 9 and the reaction liquid pressure sensor 10 are transmitted to the controller 8 in real time. The controller 8 calculates the pressure difference between the filtered clear liquid and the reaction liquid and compares it with the set pressure difference threshold. The set threshold is 0.25MPa. When the pressure difference is greater than the set threshold, the fourth solenoid valve 15, the filtered clear liquid pressure sensor 9 and the reaction liquid pressure sensor 10 are closed, and the reaction liquid is stopped from being transported into the cylinder 1.

[0043] (2) Open the sixth solenoid valve 21 on the first branch pipe 18. The reaction liquid enters the first branch pipe 18 under the action of gravity, and the reaction liquid in the cylinder 1 is emptied. The opening time of the sixth solenoid valve 21 is set in the controller 8. The opening time can be set according to historical data or calculated according to the volume of the cylinder 1 and the diameter of the first branch pipe 18. After the set time is reached, the sixth solenoid valve 21 is closed, the acid gas detector 11 and the third solenoid valve 14 are opened, and the pressurized gas is input into the cylinder 1. The pressurized gas is nitrogen with a pressure of 0.6 MPa. The nitrogen squeezes the acetic acid entrained in the carbon powder into the filter element 202 and is discharged from the top of the filtered clear liquid output pipe 5. The acid gas detector 11 detects the acidity of the gas and When the acidity value is set and compared, if it is lower than the set acidity value, the acid gas detector 11, the third solenoid valve 14 and the second solenoid valve 13 are closed, the slag discharge valve 24 and the first solenoid valve 12 are opened, and purge gas is introduced into the cylinder 1. The purge gas is nitrogen with a nitrogen pressure of 0.65 MPa. The carbon powder residue on the surface of the filter element 202 is blown off and dropped to the transport vehicle through the slag discharge port 3. The opening time of the slag discharge valve 24 and the first solenoid valve 12 is set. When the slag discharge time is reached, the slag discharge valve 24 and the first solenoid valve 12 are closed, the fifth solenoid valve 17 and the seventh solenoid valve 23 are opened, the filter element 202 is flushed, and the cleaning waste water is discharged through the second branch pipe 20. Finally, the fifth solenoid valve 17 and the seventh solenoid valve 23 are closed.

[0044] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation, characterized in that: The invention comprises a cylinder (1), wherein a tubular filter (2) for filtering a reaction liquid is fixed inside the cylinder (1), a slag discharge port (3) is provided at the bottom of the cylinder (1), a purge gas inlet connected to a purge gas input pipe (4) and a filtered clear liquid outlet connected to a filtered clear liquid output pipe (5) are provided on the cylinder (1) above the filter (2), a pressure gas inlet connected to a pressure gas input pipe (6) and a reaction liquid inlet connected to a reaction liquid input pipe (7) are provided on the cylinder (1) below the filter (2), the reaction liquid enters the cylinder (1) and passes through the filter (2) from bottom to top, the filtered clear liquid overflows from the top of the filter (2), enters the filtered clear liquid output pipe (5) through the filtered clear liquid outlet and is transported to the next process, and electromagnetic valves are provided on the purge gas input pipe (4), the filtered clear liquid output pipe (5), the pressure gas input pipe (6) and the reaction liquid input pipe (7), and the electromagnetic valves are connected to the information output end of the controller (8).

2. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 1, characterized in that: The filter (2) comprises a flower plate (201) fixedly connected to the inner wall of the cylinder (1) and a plurality of filter cores (202) fixed on the flower plate (201). The flower plate (201) is a circular plate. The outer periphery of the flower plate (201) is seamlessly connected to the inner wall of the cylinder (1). The flower plate (201) is provided with a plurality of threaded through holes. Each through hole is connected to a filter core (202). The shape of the through hole is consistent with the shape of the cross section of the filter core (202).

3. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 2, characterized in that: The filter element (202) is connected to the bottom of the flower plate (201). The filter element (202) is a slender tubular body with one end closed and the other end open. The open end of the filter element (202) forms an external thread (2021), and the external thread (2021) matches the through-hole thread. The open end of the filter element (202) is coaxially threadedly connected to the through-hole. The filter element (202) is a PE sintered filter element.

4. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 1, characterized in that: A filtered liquid pressure sensor (9) is provided at the filtered liquid outlet, and a reaction liquid pressure sensor (10) is provided at the reaction liquid inlet. Both the filtered liquid pressure sensor (9) and the reaction liquid pressure sensor (10) are connected to the information input end of the controller (8).

5. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 4, characterized in that: An online acid gas detector (11) is provided on the filtered liquid output pipeline (5), and the acid gas detector (11) is connected to the information input end of the controller (8).

6. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 1, characterized in that: The solenoid valve comprises a first solenoid valve (12) arranged on a purge gas input pipeline (4), a second solenoid valve (13) arranged on a filtered clear liquid output pipeline (5), a third solenoid valve (14) arranged on a pressurized gas input pipeline (6), and a fourth solenoid valve (15) arranged on a reaction liquid input pipeline (7).

7. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 1, characterized in that: The cylinder (1) comprises a cylinder cover (101) and a cylinder body (102), wherein the cylinder cover (101) and the cylinder body (102) are connected via a flange ring (103), and the cylinder body (102) comprises a cylindrical section and an inverted conical section connected below the cylindrical section, wherein the bottom end of the inverted conical section is connected to a slag discharge port (3).

8. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 1, characterized in that: A cleaning liquid inlet is provided on the cylinder (1) above the filter (2), and the cleaning liquid inlet is connected to a cleaning liquid input pipe (16), and a fifth electromagnetic valve (17) is provided on the cleaning liquid input pipe (16).

9. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 6, characterized in that: The reaction liquid input pipe (7) between the fourth solenoid valve (15) and the cylinder (1) is divided into a first branch pipe (18) and a second branch pipe (20) in sequence along the reaction liquid conveying direction. The first branch pipe (18) is provided with a sixth solenoid valve (21), and the second branch pipe (20) is provided with a seventh solenoid valve (23). Both the sixth solenoid valve (21) and the seventh solenoid valve (23) are connected to the controller (8).

10. The device for filtering and automatically pressing carbon powder from vinyl acetate fluidized bed distillation according to claim 1, characterized in that: The slag discharge port (3) is provided with a slag discharge valve (24) for controlling the output of the carbon powder slag, and the slag discharge valve (24) is connected to the information output end of the controller (8).

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