A bag type fine filter for recovering dimethyl carbonate in the production of vinylene carbonate

Abstract

A bag fine filter for recovering dimethyl carbonate in the production of vinylene carbonate, the device comprises a shell, a top cover is installed on the top of the shell, a washing water inlet is provided on the top cover, a pressure relief port is provided on the top cover, and a second valve is installed on the pressure relief port; a second nitrogen inlet is provided at the lower part of the shell, the second nitrogen inlet is connected to a nitrogen pipeline, a first sewage outlet is installed at the top of the shell, a second sewage outlet is provided at the upper part of the shell, a liquid suction pipe is installed on the inner side of the second sewage outlet, a sewage outlet is connected to the outer side of the second sewage outlet, and a liquid suction pump is installed on the sewage outlet; the utility model can clean the internal filter element and the like without disassembling the device by adding nitrogen disturbance and the liquid suction pipe and the liquid suction pump, and the cleaning of the device can be completed by controlling the valve, the process is simple and a large amount of labor cost is reduced, and the temperature inside the shell can be stabilized by controlling the circulating water, so that the filtering process in the device will not be affected by the temperature.

Description

Technical Field

[0001] The utility model is applicable to the technical field of filters and provides a bag-type fine filter for recovering dimethyl carbonate in the production of vinylene carbonate. Background Art

[0002] Dimethyl carbonate is needed in the production of vinylene carbonate. Dimethyl carbonate is an organic compound with the chemical formula C3H6O3. It is a low-toxic, environmentally friendly, and widely used chemical raw material. It is an important organic synthesis intermediate. Its molecular structure contains functional groups such as carbonyl, methyl, and methoxy groups, and has multiple reaction properties. It is safe, convenient, less polluting, and easy to transport in production. Dimethyl carbonate used in industry often carries some impurities, so it is necessary to use a bag fine filter for recovering dimethyl carbonate in the production of vinylene carbonate to filter it. The existing bag fine filter for recovering dimethyl carbonate in the production of vinylene carbonate needs to be opened to clean the internal filter element, etc. The process is complicated and laborious, and it needs to be cleaned once every 1-2 weeks, which wastes labor costs, and frequent disassembly of the device will cause certain damage to the device. Utility Model Content

[0003] In view of the above-mentioned defects, the purpose of the utility model is to provide a bag-type fine filter for recovering dimethyl carbonate in the production of vinylene carbonate, the device comprising a shell, a top cover is installed on the top of the shell, a washing water inlet is provided on the top cover, a first valve is installed on the washing water inlet, a pressure relief port is provided on the top cover, and a second valve is installed on the pressure relief port; a second nitrogen inlet is provided at the lower part of the shell, a third valve is installed on the second nitrogen inlet, a nitrogen pipeline is connected to the second nitrogen inlet, a first sewage outlet is installed at the top of the shell, a fourth valve is installed at the first sewage outlet, a second sewage outlet is provided at the upper part of the shell, a fifth valve is installed on the second sewage outlet, a liquid suction pipe is installed on the inner side of the second sewage outlet, a sewage outlet is connected to the outer side of the second sewage outlet, the sewage outlet is in a downward bending shape, and a liquid suction pump is installed on the sewage outlet.

[0004] Furthermore, a feed port is provided at the upper portion of the shell, and a sixth valve is installed at the feed port; a discharge port is provided at the bottom of the shell, and a seventh valve is installed at the discharge port.

[0005] Furthermore, an interlayer is installed on the inner wall of the shell, a circulating water inlet is provided at the lower part of the interlayer, and an eighth valve is installed on the circulating water inlet.

[0006] Furthermore, a first nitrogen inlet is provided at the upper portion of the shell, a ninth valve is installed at the first nitrogen inlet, and the first nitrogen inlet is connected to a nitrogen pipeline.

[0007] Furthermore, a rotating boom is installed on the upper part of the shell, a lifting rod is installed on the rotating boom, the lifting rod is connected to the rotating boom via a threaded structure, and the bottom of the lifting rod is fixedly connected to the top cover.

[0008] Furthermore, a pressure sensor is installed in the upper part of the shell, the pressure sensor is electrically connected to a controller, and the controller is electrically connected to the second valve.

[0009] Furthermore, a mounting frame is installed in the middle of the shell, and a plurality of filter buckets are installed on the mounting frame, and a filter core is installed in each of the filter buckets.

[0010] Furthermore, a tripod is installed at the bottom of the shell.

[0011] Furthermore, a sealing gasket is installed between the top cover and the shell.

[0012] Furthermore, a temperature sensor is installed in the shell, and the temperature sensor is electrically connected to the controller.

[0013] The beneficial effects of the utility model are as follows: the utility model can clean the internal filter element and the like without disassembling the device by adding nitrogen disturbance and a liquid extraction pipe and a liquid extraction pump. The device can be cleaned by only controlling the valve. The process is simple and reduces a lot of labor costs. The temperature inside the shell can be stabilized by controlling the circulating water, so that the filtering process in the device will not be affected by the temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a bag-type fine filter device for recovering dimethyl carbonate in the production of vinylene carbonate;

[0015] Figure 2 It is a structural schematic diagram of the mounting frame 17;

[0016] In the figure: 1. top cover; 2. washing water inlet; 3. first nitrogen inlet; 4. feed inlet; 5. interlayer; 6. shell; 7. circulating water inlet; 8. second nitrogen inlet; 9. nitrogen pipeline; 10. lifting rod; 11. pressure relief port; 12. rotating boom; 13. circulating water outlet; 14. pressure sensor; 15. second sewage outlet; 16. liquid pump; 17. mounting frame; 18. filter bucket; 19. first sewage outlet; 20. discharge port; 21. liquid extraction pipe; 22. sewage pipeline; 23. filter element; 24. tripod; 25. temperature sensor. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0018] See also Figure 1 , 2 The utility model aims to provide a bag-type fine filter for recovering dimethyl carbonate in the production of vinylene carbonate, comprising a shell 6, a top cover 1 is installed on the top of the shell 6, a sealing gasket is installed between the top cover 1 and the shell 6, and the sealing gasket can enhance the sealing between the shell 6 and the top cover 1, so as to prevent the gas in the shell 6 from leaking out or the outside air from entering the shell 6 to contaminate the materials in the shell 6;

[0019] A feed port 4 is provided at the upper portion of the shell 6, and a sixth valve is installed at the feed port 4. The required filtered liquid can be injected into the interior of the shell 6 through the feed port 4. A discharge port 20 is provided at the bottom of the shell 6, and a seventh valve is installed at the discharge port 20. When the filtered liquid in the shell 6 needs to be discharged from the shell 6, the material is discharged through the discharge port 20. The seventh valve is always in an open state during the normal filtering process and will only be closed during the washing process or other special circumstances.

[0020] A mounting frame 17 is installed in the middle of the shell 6, and a plurality of holes are provided on the mounting frame. A plurality of filter buckets 18 are installed on the mounting frame 17, and the filter buckets 18 are matched with the holes on the mounting frame 17. A filter element 23 is installed in each filter bucket 18, and the filter element 23 is matched with the filter bucket 18. The filter element 23 is directly placed in the filter bucket 18 and can be directly taken out when maintenance or replacement is required.

[0021] The top cover 1 is provided with a washing water inlet 2, and a first valve is installed on the washing water inlet 2, and washing water can be injected into the net shell 6 through the washing water inlet 2 for washing inside the shell 6; the top cover 1 is provided with a pressure relief port 11, and a second valve is installed on the pressure relief port 11, and a pressure sensor 14 is installed on the upper part of the shell 6, and the pressure sensor 14 is electrically connected to a controller, and the controller is electrically connected to the second valve. The pressure sensor 14 can detect the pressure in the shell 6. When the pressure in the shell 6 reaches a set value, the pressure sensor 14 will transmit a signal to the second valve to control the second valve to open for pressure relief. When the pressure in the shell 6 returns to a normal value, the controller controls the second valve to close and stop the pressure relief;

[0022] The bottom of the shell 6 is provided with a second nitrogen inlet 8, and a third valve is installed on the second nitrogen inlet 8. The second nitrogen inlet 8 is connected to the nitrogen pipeline 9. When washing the inside of the shell 6, the third valve is opened to allow the medium-pressure nitrogen to enter the shell 6 from the bottom of the shell 6 through the second nitrogen inlet 8, disturbing the washing water in the shell 6, so that the filtered substances attached to the filter element 23 are separated from the filter element 23, and the filtered substances rise with the washing water; the upper part of the shell 6 is provided with a second sewage outlet 15, and a fifth valve is installed on the second sewage outlet 15. The inner side of the second sewage outlet 15 is provided with a fifth valve. There is a liquid extraction pipe 21, and a sewage pipe 22 is connected to the outside of the second sewage outlet 15. The sewage pipe 22 is a downwardly bent shape, and a liquid extraction pump 16 is installed on the sewage pipe 22. When the washing process in the shell 6 is completed, the fifth valve is opened, and the liquid extraction pump 16 is turned on to allow the washing water with filtered substances in the upper part of the shell 6 to be extracted and transported to the corresponding work section from the sewage pipe 22; the shell 6 is provided with a first sewage outlet 19 at the first sewage outlet 19. The first sewage outlet 19 is provided with a fourth valve. When the upper sewage discharge process is completed, the fourth valve is opened to discharge the lower washing water from the first sewage outlet 19 to the outside of the shell 6.

[0023] An interlayer 5 is installed on the inner wall of the shell 6, and a circulating water inlet 7 is provided at the lower part of the interlayer 5. An eighth valve is installed on the circulating water inlet 7. A temperature sensor 25 is installed in the shell 6. The temperature sensor 25 is electrically connected to the controller. The temperature sensor 25 can detect the temperature in the shell 6. The circulating water can keep the temperature in the shell 6 stable. The temperature in the shell 6 is controlled by controlling the opening degree of the eighth valve.

[0024] A first nitrogen inlet 3 is provided on the upper portion of the shell 6. A ninth valve is installed on the first nitrogen inlet 3. The first nitrogen inlet 3 is connected to a nitrogen pipeline. Nitrogen can enter the shell 6 from the first nitrogen inlet 3. During the filtering process, pressure can be provided for filtering, and the filtering speed can be accelerated. The flow rate of nitrogen can be controlled by controlling the opening degree of the ninth valve, thereby controlling the pressure in the shell 6.

[0025] A rotating boom 12 is installed on the upper part of the shell 6, and a lifting rod 10 is installed on the rotating boom 12. The lifting rod 10 is connected to the rotating boom 12 through a threaded structure, and the bottom of the lifting rod 10 is fixedly connected to the top cover 1. When the top cover 1 is opened, the top cover 1 can be lifted by rotating the lifting rod 10, and then the top cover 1 can be moved away from the top of the shell 6 by rotating the boom 12, so as to facilitate maintenance work inside the shell 6.

[0026] A tripod 24 is installed at the bottom of the shell 6, and the tripod 24 can fix the device, making the device more stable and preventing the device from tipping over.

[0027] To sum up, in actual use, the filtered material is injected from the feed port 4 and enters the shell 6 for filtration, and the material after filtration is discharged from the discharge port 20; after the filtration process is completed, the inside of the shell 6 is washed, and washing water is injected into the shell 6 from the washing water inlet 2. After the injection is completed, the third valve is opened to allow nitrogen to disturb the washing water, and then the fifth valve is opened, and the liquid pump 16 is turned on to extract the washing water in the upper part of the shell 6. After the extraction is completed, the fourth valve is opened to discharge the washing water in the lower part of the shell 6. Repeat this operation 3-4 times to complete the cleaning process.

[0028] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A bag type fine filter for recovering dimethyl carbonate in the production of vinylene carbonate, characterized in that: The invention comprises a shell (6), wherein a top cover (1) is installed on the top of the shell (6), a washing water inlet (2) is provided on the top cover (1), a first valve is installed on the washing water inlet (2), a pressure relief port (11) is provided on the top cover (1), a second valve is installed on the pressure relief port (11); a second nitrogen inlet (8) is provided at the bottom of the shell (6), a third valve is installed on the second nitrogen inlet (8), the second nitrogen inlet (8) is connected to a nitrogen pipeline (9), and the shell (6) is provided with a second nitrogen inlet (8). The housing (6) is provided with a first sewage outlet (19), the first sewage outlet (19) being provided with a fourth valve, the upper part of the housing (6) is provided with a second sewage outlet (15), the second sewage outlet (15) being provided with a fifth valve, the inner side of the second sewage outlet (15) being provided with a liquid extraction pipe (21), the outer side of the second sewage outlet (15) being connected with a sewage pipe (22), the sewage pipe (22) being in a downwardly bent shape, and the sewage pipe (22) being provided with a liquid extraction pump (16).

2. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: The upper portion of the shell (6) is provided with a feed inlet (4), and the feed inlet (4) is equipped with a sixth valve. The bottom portion of the shell (6) is provided with a discharge port (20), and the discharge port (20) is equipped with a seventh valve.

3. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: An interlayer (5) is installed on the inner wall of the shell (6), a circulating water inlet (7) is provided at the lower part of the interlayer (5), and an eighth valve is installed on the circulating water inlet (7).

4. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: A first nitrogen inlet (3) is provided at the upper portion of the shell (6), a ninth valve is installed at the first nitrogen inlet (3), and the first nitrogen inlet (3) is connected to a nitrogen pipeline.

5. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: A rotating boom (12) is installed on the upper part of the shell (6), a lifting rod (10) is installed on the rotating boom (12), the lifting rod (10) is connected to the rotating boom (12) via a threaded structure, and the bottom of the lifting rod (10) is fixedly connected to the top cover (1).

6. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: A pressure sensor (14) is installed in the upper inner portion of the housing (6); the pressure sensor (14) is electrically connected to a controller; and the controller is electrically connected to the second valve.

7. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: A mounting frame (17) is installed in the middle of the housing (6), and a plurality of filter buckets (18) are installed on the mounting frame (17), and a filter core (23) is installed in each of the filter buckets (18).

8. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: A tripod (24) is installed at the bottom of the housing (6).

9. The bag type fine filter for recovering dimethyl carbonate for vinylene carbonate production according to claim 1, characterized in that: A sealing gasket is installed between the top cover (1) and the shell (6).

10. The bag type fine filter for recovering dimethyl carbonate in the production of vinylene carbonate according to claim 6, characterized in that: A temperature sensor (25) is installed in the housing (6), and the temperature sensor (25) is electrically connected to the controller.

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