Pilot-scale test filtering device with adjustable volume

Abstract

A volume-adjustable pilot plant test filtering device comprises an outer barrel, an inner filtering barrel, a lifting upper cover and a lifting supporting frame, the inner filtering barrel is arranged in the outer barrel and fixedly connected with an inner turned edge at the top of the outer barrel, and a filtrate cavity is formed between the two barrels. The lower end of the lifting upper cover is in sealed connection with the inner flange of the outer barrel and the inner wall of the inner filter barrel through sealing rings, the lifting supporting frame is fixed to the top of the outer barrel, the top of the lifting supporting frame is in threaded connection with a first lifting screw, and a connector at the bottom of the first lifting screw is connected with a first fixing sleeve at the top of the lifting upper cover; a lower expansion valve is arranged at a discharging port in one side of the bottom of the upper lifting cover, a feeding port of the lower expansion valve is connected with a first soft connecting pipe, a liquid outlet is formed in the bottom of the outer barrel, and an outlet valve is arranged at the liquid outlet. According to the device, the effective filtering volume can be adjusted according to the material volume, mechanical pressurization or inert gas pressurization can be adopted as filtering power, and the device is more suitable for the filtering requirement in the pilot plant experiment stage.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a pilot-scale filtering device with adjustable volume. Background Art

[0002] Filtration operation is a common and indispensable solid-liquid separation means in the fine chemical or pharmaceutical field. It is a necessary device for realizing solid-liquid separation and filter cake washing. At the same time, it is a process plan that must be determined in the production process research stage to select different filtration methods and device volumes according to the volume and properties of the material.

[0003] It is found in the pilot-scale experiment that in the pilot-scale stage, due to the different scales of the scale-up experiment, the requirements for the filtration volume of the filter are different. Compared with the effective filtration volume of the filter, if the material volume is too small, the filtrate will not be filtered cleanly and the amount of washing solvent used will be too large; if the material volume is too large, batch filtration is adopted, which not only affects the experiment time limit, but also the obtained materials are uneven, and it cannot fully reflect the influence of the filtration method on the filtration effect, thus weakening the guiding role for the production stage. If different volume filtration devices are selected according to different experiment scales, the experiment cost will be increased.

[0004] At present, mechanical pressurization or inert gas pressurization is generally used as the filtration power in the production filtration device. Mechanical pressurization is suitable for materials with a small bulk density, and inert gas pressurization is suitable for materials with a large bulk density and whose filter cakes are not easy to crack during the filtration process. Trying different filtration power filtration devices in the pilot-scale stage is also one of the purposes of the pilot-scale experiment to provide technical support for trial production. Summary of the Utility Model

[0005] In order to overcome the drawbacks of the prior art, the utility model provides a pilot-scale filtering device with adjustable volume, which can not only adjust the effective filtration volume according to the material volume, but also can use mechanical pressurization or inert gas pressurization as the filtration power, and is more suitable for the filtration requirements in the pilot-scale experiment stage.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A pilot-scale filtration device with adjustable volume, the filtration device comprising an outer cylinder, an inner filtration cylinder, a lifting upper cover and a lifting support frame. The inner filtration cylinder is arranged inside the outer cylinder and is fixedly connected to the inner flanging at the top of the outer cylinder. A filtrate chamber is formed between the two cylinders. The outer wall at the lower end of the lifting upper cover is hermetically connected to the inner flanging of the outer cylinder and the inner wall of the inner filtration cylinder through a sealing ring and can slide up and down along the inner filtration cylinder. The lifting support frame is fixed to the top of the outer cylinder. A first lifting screw rod is threadedly connected to the top of the lifting support frame. The connecting head at the bottom of the first lifting screw rod is connected to the first fixed sleeve at the top of the lifting upper cover. A lower expansion valve is arranged at the discharge port on one side of the bottom of the lifting upper cover. The feed port of the lower expansion valve is connected to a first flexible connecting pipe. The bottom of the outer cylinder is provided with a liquid outlet. An outlet valve is arranged at the liquid outlet, and the discharge port of the outlet valve is connected to a second flexible connecting pipe.

[0008] For the above-mentioned pilot-scale filtration device with adjustable volume, the inner filtration cylinder comprises a side filtration plate and a lower filtration plate. A plurality of filtration holes are evenly distributed on the side filtration plate and the lower filtration plate. The outer ring of the lower filtration plate is set as a solid plate, and a groove is arranged thereon. The lower end of the side filtration plate is clamped in the groove. A second fixed sleeve is arranged at the central position of the bottom of the lower filtration plate. A second lifting screw rod is threadedly connected to the bottom of the outer cylinder. The connecting head of the second lifting screw rod is connected to the second fixed sleeve. The top of the side filtration plate is fixedly connected to the inner flanging at the top end of the side wall of the outer cylinder.

[0009] For the above-mentioned pilot-scale filtration device with adjustable volume, the outer cylinder comprises a side cylinder wall and a bottom plate. An outer flanging is circumferentially arranged at the bottom of the side cylinder wall. A first sealing-ring groove is arranged between the outer flanging and the connection of the bottom plate. The outer flanging and the bottom plate are hermetically connected through a plurality of evenly distributed fastening bolts.

[0010] For the above-mentioned pilot-scale filtration device with adjustable volume, a second sealing-ring groove is arranged on the side wall of the inner flanging at the top end of the side cylinder wall. A third sealing-ring groove is arranged on the outer wall at the bottom of the side filtration plate. The third sealing-ring groove is located below the second sealing-ring groove. The lifting upper cover is hermetically connected to the outer cylinder and the inner filtration cylinder respectively through the second sealing-ring groove and the third sealing-ring groove.

[0011] For the above-mentioned pilot-scale filtration device with adjustable volume, the lifting upper cover is set as a hollow cylinder structure, and its top is set as a cross support rod structure. The first fixed sleeve is arranged at the intersection of the cross support rods. The height of the screw adjusting wheel of the lower expansion valve and the extension length of the first flexible connecting pipe are both higher than the height of the lifting upper cover.

[0012] For the above-mentioned pilot-scale filtration device with adjustable volume, a fixed support is further arranged on the outer wall of the side cylinder wall.

[0013] The beneficial effects of the present utility model are as follows: The present utility model utilizes a liftable upper cover to adjust the filtration volume in real time. The liftable upper cover can be used as a mechanical pressing plate for pressure filtration. At the same time, inert gas can be filled into the filtration chamber through the first flexible connection tube connected to the first lower expansion valve for high-pressure gas pressure filtration. The two filtration powers can be switched or used in combination as required, with stronger versatility. During the pilot experiment stage, it can not only improve the experimental efficiency, save equipment investment, but also increase the guidance for the trial production stage. The liftable upper cover moves up and down along the cylinder body, and can adjust the effective filtration volume according to the needs of the pilot scale. Through the sealing technology, it can effectively prevent the filtrate from overflowing when adjusting the filtration volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described below with reference to the accompanying drawings.

[0015] Figure 1 is a schematic structural diagram of the overall device of the present utility model;

[0016] Figure 2 is a top view structural diagram.

[0017] In the figure: 1. Outer cylinder body; 1-1. Side cylinder wall; 1-2. Bottom plate; 1-3. Flanged edge; 1-4. First sealing ring groove; 2. Inner filtration cylinder body; 2-1. Side filtration plate; 2-2. Lower filtration plate; 2-3. Groove; 3. Liftable upper cover; 4. Lift support frame; 5. Filtrate chamber; 6. First lift screw; 7. First fixing sleeve; 8. Lower expansion valve; 9. First flexible connection tube; 10. Liquid outlet; 11. Outlet valve; 12. Second fixing sleeve; 13. Second lift screw; 14. Fastening bolt; 15. Second sealing ring groove; 16. Third sealing ring groove; 17. Fixed support; 18. Second flexible connection tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described below with reference to the accompanying drawings.

[0019] Refer to Figure 1 and Figure 2, the pilot-scale filtration device with adjustable volume of the present utility model includes a detachable outer cylinder body 1, a detachable inner filtration cylinder body 2, a liftable upper cover 3 that can slide up and down, and a lift support frame 4. The inner filtration cylinder body 2 is arranged inside the outer cylinder body 1, and a filtrate chamber 5 is formed between the two cylinder bodies. The outer cylinder body 1 includes a side cylinder wall 1-1 and a bottom plate 1-2. An outward flange 1-3 is circumferentially arranged at the bottom of the side cylinder wall 1-1. A first sealing ring groove 1-4 is arranged between the connection of the outward flange 1-3 and the bottom plate 1-2. The outward flange 1-3 and the bottom plate 1-2 are hermetically connected by a plurality of evenly distributed fastening bolts 14. The inner filtration cylinder body 2 includes a side filtration plate 2-1 and a lower filtration plate 2-2. A plurality of filtration holes are evenly distributed on the side filtration plate 2-1 and the lower filtration plate 2-2. The outer ring of the lower filtration plate 2-2 is set as a solid plate, and a groove 2-3 is arranged thereon. The lower end of the side filtration plate 2-1 is clamped in the groove 2-3. A second fixing sleeve 12 is arranged at the central position of the bottom of the lower filtration plate 2-2. A second lifting screw 13 is threadedly connected to the midline position of the bottom plate 1-2, and the threaded connection between the two is hermetically connected to prevent liquid leakage. The connection head of the second lifting screw 13 is connected to the second fixing sleeve 12. The second lifting screw 13 can adjust the height of the lower filtration plate 2-2, which is convenient for the disassembly and assembly of the lower filtration plate 2-2 and the side filtration plate 2-1. The top of the side filtration plate 2-1 is fixedly connected to the inward flange at the top of the side cylinder wall 1-1. An outlet 10 is arranged on one side of the bottom plate 1-2, and an outlet valve 11 is arranged at the outlet. The discharge port of the outlet valve is connected to a second flexible tube 18;

[0020] The liftable upper cover 3 is set as a cavity cylinder structure, and its top is set as a cross support rod structure. A first fixing sleeve 7 is arranged at the intersection of the cross support rods. The lift support frame 4 is welded to the top of the inward flange of the side cylinder wall 1-1. A first lifting screw 6 is threadedly connected to the top of the lift support frame 4. The first lifting screw 6 passes through the top of the lift support frame and is connected to the first fixing sleeve 7. A third sealing ring groove 16 is arranged at the bottom of the outer side wall of the liftable upper cover. The liftable upper cover 3 is hermetically connected to the inner wall of the side filtration plate 2-1 through the third sealing ring groove 16. A second sealing ring groove 15 is arranged on the side wall of the inward flange of the side cylinder wall 1-1 above the third sealing ring groove 16. The side wall of the liftable upper cover is hermetically connected to the side cylinder wall through the second sealing ring groove 15. The liftable upper cover can move up and down along the side filtration plate under the adjustment of the lifting screw, so as to adjust the volume of the filtration chamber;

[0021] A lower expansion valve 8 is arranged at the discharge port on one side of the bottom of the liftable upper cover 3. The feed port of the lower expansion valve 8 is connected to a first flexible tube 9. The height of the screw adjusting wheel of the lower expansion valve 8 and the extension length of the first flexible tube 9 are both higher than the height of the liftable upper cover 3, which is convenient for adjusting the filtration volume and replacing the valve.

[0022] A fixing bracket 17 is further arranged on the outer wall of the side cylinder wall 1-1 to facilitate the movement of the whole device.

[0023] Working process: First, rotate the second lifting screw rod 13 to drive the lower filter plate 2-2 to rise and snap into the groove 2-3 at the edge of the side filter plate 2-1. Then, tightly connect the bottom plate 1-2 and the outward-turned edge 1-3 at the lower part of the side cylinder wall 1-1 through the fastening bolt 14. According to the volume of the filtered material, adjust the position of the lifting upper cover through the first lifting screw rod to obtain a suitable filter volume. After that, open the lower expansion valve and the outlet valve, and the material is pumped into the filtering device through the first flexible connection pipe. After all the material enters the filter, according to the properties of the material, pressurize and filter with inert gas at the first flexible connection pipe, or close the lower expansion valve and perform mechanical pressurized filtration through the lifting upper cover, or use the two filtration powers in combination for filtration.

[0024] After the filtration operation meets the requirements, open the outlet valve, adjust the height of the lifting upper cover as needed, evacuate through the first flexible connection pipe, and a certain volume of filtrate enters the filter through the second flexible connection pipe for soaking and washing. After reaching the soaking time, repeat the filtration operation.

[0025] When discharging, open the outlet valve, open the lower filter plate by rotating the second lifting screw rod, and then open the bottom plate by removing the fastening bolt, and the material will be smoothly discharged. At the same time, the lifting upper cover can be used to assist in discharging.

Claims

1. A pilot filtration device with adjustable volume, characterized in that: The filtering device comprises an outer cylinder (1), an inner filter cylinder (2), a lifting cover (3) and a lifting support frame (4); the inner filter cylinder (2) is arranged inside the outer cylinder (1) and is fixedly connected to the inner flange at the top of the outer cylinder (1); a filtrate chamber (5) is formed between the two cylinders; the outer wall of the lower end of the lifting cover (3) is sealedly connected to the inner flange of the outer cylinder (1) and the inner wall of the inner filter cylinder (2) via a sealing ring, and can slide up and down along the inner filter cylinder (2); the lifting support frame (4) is fixed to the outer cylinder (1). At the top, the top of the lifting support frame (4) is threadedly connected to a first lifting screw (6), the connector at the bottom of the first lifting screw (6) is connected to a first fixing sleeve (7) at the top of the lifting upper cover (3), a lower expansion valve (8) is provided at a discharge port on one side of the bottom of the lifting upper cover (3), the feed port of the lower expansion valve (8) is connected to a first flexible connecting pipe (9), a liquid outlet (10) is provided at the bottom of the outer cylinder (1), an outlet valve (11) is provided at the liquid outlet (10), and the outlet of the outlet valve is connected to a second flexible connecting pipe (18); The inner filter cylinder (2) comprises a side filter plate (2-1) and a lower filter plate (2-2), a plurality of filter holes being evenly distributed on the side filter plate (2-1) and the lower filter plate (2-2), the outer ring of the lower filter plate (2-2) being arranged as a solid plate, on which a groove (2-3) is arranged, the lower end of the side filter plate (2-1) being clamped in the groove (2-3), a second fixing sleeve (12) being arranged at the center position of the bottom of the lower filter plate (2-2), a second lifting screw (13) being threadedly connected to the bottom of the outer cylinder (1), a connector of the second lifting screw (13) being connected to the second fixing sleeve (12), and the top of the side filter plate (2-1) being fixedly connected to the inner flange at the top end of the side wall of the outer cylinder (1).

2. The volume-adjustable pilot filtration device according to claim 1, characterized in that: The outer cylinder body (1) comprises a side cylinder wall (1-1) and a bottom plate (1-2); an outer flange (1-3) is circumferentially arranged at the bottom of the side cylinder wall (1-1); a first groove (1-4) with a sealing ring is arranged between the outer flange (1-3) and the bottom plate (1-2); the outer flange (1-3) and the bottom plate (1-2) are sealed and connected via a plurality of evenly distributed fastening bolts (14).

3. The volume-adjustable pilot filtration device according to claim 2, characterized in that: A second sealing ring groove (15) is provided on the side wall of the inner flange at the top end of the side cylinder wall (1-1), and a third sealing ring groove (16) is provided on the outer wall at the bottom of the side filter plate (2-1), wherein the third sealing ring groove (16) is located below the second sealing ring groove (15), and the lifting cover (3) is sealedly connected to the outer cylinder (1) and the inner filter cylinder (2) via the second sealing ring groove (15) and the third sealing ring groove (16), respectively.

4. The volume-adjustable pilot filtration device according to claim 1, characterized in that: The lifting cover (3) is configured as a hollow cylindrical structure, the top of which is configured as a cross support rod structure, the first fixing sleeve (7) is arranged at the intersection of the cross support rods, and the height of the screw adjustment wheel of the lower expansion valve (8) and the extension of the first flexible connecting pipe (9) are both higher than the height of the lifting cover (3).

5. The volume-adjustable pilot filtration device according to claim 2, characterized in that: A fixing bracket (17) is also provided on the outer wall of the side cylinder wall (1-1).

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