A reduced pressure filtration device for catalyst preparation

Abstract

The utility model relates to a kind of reduced-pressure suction filtration devices for catalyst preparation, including base, hopper, liquid collecting bottle, suction hood, lifting device, vacuum pump, lifting device is set on base, liquid collecting bottle and vacuum pump;Lifting device is equipped with lifting support, and one end of lifting support is fixed hopper by annular positioning support, and hopper bottom end is equipped with support part, and support part outside is sleeved with positioning support, and support part bottom end is provided with liquid guide pipe, and lower end of liquid guide pipe is embedded into liquid collecting bottle, and liquid guide pipe outside is sleeved with suction hood, and suction hood side wall is connected with suction pipe;Spring is equipped on the top of suction hood, and spring supports suction hood downward, and the lower end of suction hood is equipped with conical flared portion, and the inner wall of flared portion on the lower end of suction hood is equipped with sealing ring, and lifting device drives hopper to descend and elastically presses suction hood by lifting support, so that the conical flared portion of suction hood is pressed on the top end conical surface of liquid collecting bottle by sealing ring to realize sealing, to avoid the problem of insufficient vacuum degree, to ensure the filtration efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum filtration devices, and in particular to a vacuum filtration device for catalyst preparation. Background Technology

[0002] In the preparation of platinum catalysts, vacuum filtration is a method for separating liquids and solids. Its principle is to use a vacuum pump to reduce the pressure in a container. The liquid component is forced into the container under the pressure difference between the external atmospheric pressure and the negative pressure at the vacuum pump's extraction port, while the solid is intercepted by a filter screen, thus achieving solid-liquid separation. However, in existing vacuum filtration devices, the filtration rate is significantly affected as the amount of solid matter on the filter screen gradually increases. Furthermore, the filter screen is easily damaged due to excessive pressure, and replacement and maintenance are inconvenient. Chinese patent document CN202022395518.3 discloses an improved structure for a vacuum filtration device. In this application, the lower end of the vacuum hood is connected to the bottle mouth via a sleeve to ensure a sealed connection. This connection method has a relatively poor sealing effect, causing a decrease in vacuum level, which reduces the effective pressure difference applied to the filter cake. This significantly slows down the rate at which the liquid passes through the filter material, greatly extending the filtration time. Utility Model Content

[0003] To address the aforementioned problems, this invention discloses a vacuum filtration device for catalyst preparation, which solves the problem of poor sealing between containers in existing filtration devices.

[0004] The specific technical solution is as follows: A vacuum filtration device for catalyst preparation includes a base, a funnel, a collection bottle, a vacuum hood, a lifting device, and a vacuum pump. The lifting device, collection bottle, and vacuum pump are mounted on the base. The collection bottle has a tapered top with an opening. The lifting device has a horizontally movable lifting rod. One end of the lifting rod is fixed to the funnel via a ring-shaped positioning support. A filter membrane is placed inside the funnel. The bottom of the funnel is tapered and has a support portion. The positioning support is sleeved on the outside of the support portion. A liquid guide tube is located at the bottom of the support portion. The lower end of the liquid guide tube is embedded in the collection bottle. The vacuum hood is sleeved on the outside of the liquid guide tube. A vacuum pipe is connected to the side wall of the vacuum hood. The air pipe is connected to the vacuum pump's suction end; the inner wall of the suction hood is equipped with a sealing element and is fitted onto the liquid guide tube to achieve longitudinal sealing, and the suction hood is positioned by static friction between the sealing element and the liquid guide tube; a spring is fitted on the top of the suction hood, and the upper end of the spring presses against the bottom of the positioning support, so that the spring supports the suction hood downwards; the lower end of the suction hood is equipped with a conical flared part, which is adapted to the outer wall of the conical surface at the top of the liquid collection bottle, and an annular groove is provided on the inner wall of the flared part at the lower end of the suction hood, in which a sealing ring is provided; the lifting device drives the funnel to descend through the lifting support rod and elastically presses the suction hood, so that the conical flared part of the suction hood presses against the conical surface at the top of the liquid collection bottle through the sealing ring to achieve sealing.

[0005] Furthermore, the base is provided with a placement seat for positioning the bottom of the liquid collection bottle.

[0006] Furthermore, the lifting device includes a lifting frame, a servo motor, and a lead screw. The lead screw rotates longitudinally inside the lifting frame. The lead screw is driven to rotate by the servo motor located at the top of the lifting frame. A threaded block is threaded onto the lead screw, and a lifting support rod is connected to one side of the threaded block. The lifting support rod passes through the side wall of the lifting frame and has a longitudinal sliding opening on the side wall of the lifting frame. Furthermore, the width of the sliding opening is adapted to the width of the lifting support rod.

[0007] Furthermore, the middle side wall of the support part is provided with a ring-shaped groove, and the inner wall of the positioning support is provided with a ring-shaped protrusion. The protrusion and the groove cooperate to realize the installation and positioning between the support part and the positioning support.

[0008] Furthermore, the top center of the exhaust hood is provided with a sleeve, which is sleeved on the liquid guide tube, and the inner wall of the sleeve is also attached to the outer wall of the liquid guide tube by a sealing ring.

[0009] The beneficial effects of this utility model are reflected in: In this invention, the funnel is raised and lowered by the lifting support rod of the lifting device, which facilitates the separation of the funnel and the vacuum hood from the liquid collection bottle, eliminating the need for manual disassembly of the container and making the operation simple and convenient.

[0010] In this invention, during the descent of the vacuum hood, the conical flared part passing through its bottom end elastically presses against the outer wall of the conical top surface of the collection bottle, and the sealing ring ensures the sealing between the containers, thereby avoiding the problem of insufficient vacuum and ensuring the filtration efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention before the vacuum hood is connected to the liquid collection bottle.

[0012] Figure 2 This is a schematic diagram of the structure after the vacuum hood and the liquid collection bottle are connected in this utility model.

[0013] Figure 3 This is a schematic diagram of the connection structure between the extraction hood and the funnel in this utility model.

[0014] Explanation of reference numerals in the attached drawings: Base 1, Funnel 2, Support 21, Groove 211, Liquid guide tube 22, Filter membrane 23, Collection bottle 3, Vacuum hood 4, Seal 41, Spring 42, Sleeve tube 43, Conical flared part 44, Embedded groove 441, Sealing ring 442, Lifting frame 5, Slide 51, Servo motor 6, Lead screw 7, Threaded block 71, Lifting support rod 8, Positioning support 81, Protrusion 811, Placement seat 9, Vacuum pump 10, Vacuum pipe 101. Detailed Implementation

[0015] To make the technical solution of this utility model clearer and more explicit, the utility model will be further described below with reference to the accompanying drawings. Any solution derived by equivalent substitution and conventional reasoning of the technical features of this utility model falls within the protection scope of this utility model. The fixed connections and fixed settings mentioned in this utility model are all common connection methods in the mechanical field, including welding, bolt and nut connections, and screw connections.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Please see the appendix Figure 1-3 This embodiment provides a vacuum filtration device for catalyst preparation, including a base 1, a funnel 2, a collection bottle 3, a vacuum hood 4, a lifting device, and a vacuum pump 10. The base 1 is equipped with the lifting device, the collection bottle 3, and the vacuum pump 10. The top of the collection bottle 3 is tapered and has a bottle mouth. The lifting device has a horizontally movable lifting support rod 8. One end of the lifting support rod 8 is fixed to the funnel 2 by a ring-shaped positioning support 81. The funnel is located directly above the collection bottle 3. A filter membrane 23 is placed inside the funnel. The bottom of the funnel 2 is tapered and has a support part 21. The positioning support 81 is sleeved on the outside of the support part. A liquid guide tube 22 is provided at the bottom of the support part 21, and the lower end of the liquid guide tube 22 is embedded in the collection bottle 3.

[0018] A vacuum hood 4 is sleeved on the outside of the liquid guide tube 22. A vacuum pipe 101 is connected to the side wall of the vacuum hood and is connected to the vacuum pump 10. A spring 42 is sleeved on the top of the vacuum hood 4. The upper end of the spring 42 presses against the bottom of the positioning support 81, so that the spring 42 supports the vacuum hood 4 downward. The lower end of the vacuum hood 4 is provided with a conical flared part 44. The conical flared part is adapted to the outer wall of the conical surface at the top of the liquid collection bottle 3. An annular groove 441 is provided on the inner wall of the flared part at the lower end of the vacuum hood 4. A sealing ring 442 for pressing and cooperating with the conical surface at the top of the liquid collection bottle 3 is embedded in the groove 441.

[0019] In this embodiment, a sealing element 41 is provided on the inner wall of the vacuum hood 4 and is sleeved on the liquid guide tube 22 to achieve longitudinal sealing. The vacuum hood 4 is positioned by static friction between the sealing element 41 and the liquid guide tube 22. Therefore, without the influence of external force, the vacuum hood 4 is fixed on the liquid guide tube 22 by frictional resistance.

[0020] During the sealing process, the lifting device lowers the funnel 2 via the lifting support rod 8. During the descent, the conical flared part 44 of the suction hood 4 first comes into contact with the top conical surface of the collection bottle. As the funnel continues to descend, the liquid guide tube 22 moves downward against frictional resistance. At the same time, the spring 42 is compressed by force. Finally, by elastically pressing the suction hood 4, the conical flared part of the suction hood is pressed against the top conical surface of the collection bottle 3 through the sealing ring 442 to achieve a seal.

[0021] In this embodiment, the lifting device includes a lifting frame 5, a servo motor 6, and a lead screw 7. The lead screw 7 rotates longitudinally inside the lifting frame 5. The lead screw 7 is driven to rotate by the servo motor 6 located at the top of the lifting frame 5. A threaded block 71 is threadedly connected to the lead screw 7. A lifting support rod 8 is connected to one side of the threaded block. The lifting support rod horizontally passes through the side wall of the lifting frame 5 and has a sliding opening 51 longitudinally opened on the side wall of the lifting frame 5. The width of the sliding opening is adapted to the width of the lifting support rod 8, thereby playing a limiting role. The servo motor drives the lead screw to rotate, so that the threaded block drives the lifting support rod 8 to rise and fall under the action of the thread.

[0022] In this embodiment, the base 1 is provided with a placement seat 9 for positioning the bottom of the liquid collection bottle 3, so as to ensure that the position of the liquid collection bottle 3 always matches the position of the conical flared part 44 at the lower end of the vacuum hood 4, thereby enabling precise docking.

[0023] In this embodiment, the middle side wall of the support part 21 is provided with a ring-shaped groove 211, and the inner wall of the positioning support 81 is provided with a ring-shaped protrusion 811. The installation and positioning between the support part 21 and the positioning support 81 are achieved by the cooperation of the protrusion 811 and the groove 211.

[0024] In this embodiment, a sleeve 43 is provided at the center of the top of the air extraction hood 4. The sleeve 43 is sleeved on the liquid guide tube 22, and the inner wall of the sleeve 43 is also attached to the outer wall of the liquid guide tube 22 through a sealing ring, thereby further improving the sealing between the air extraction hood 4 and the liquid guide tube 22.

[0025] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A vacuum filtration apparatus for catalyst preparation, characterized in that, The system includes a base (1), a funnel (2), a collection bottle (3), a vacuum hood (4), a lifting device, and a vacuum pump (10). The base (1) is equipped with the lifting device, the collection bottle (3), and the vacuum pump (10). The top of the collection bottle (3) is tapered and has a bottle mouth. The lifting device has a horizontally adjustable lifting rod (8). One end of the lifting rod (8) is fixed to the funnel (2) by a ring-shaped positioning support (81). A filter membrane (23) is installed inside the funnel. The bottom of the funnel is tapered and has a support part (21). The positioning support (81) is sleeved on the outside of the support part (21). A liquid guide tube (22) is installed at the bottom of the support part (21). The lower end of the liquid guide tube (22) is embedded in the collection bottle. The vacuum hood (4) is sleeved on the outside of the liquid guide tube (22). A vacuum pipe (101) is connected to the side wall of the vacuum hood (4). The vacuum pipe (101) is connected to the vacuum pump. The air pump (10) is connected to the air extraction end; the inner wall of the air extraction hood (4) is provided with a sealing element (41) and is sleeved on the liquid guide tube (22) to achieve longitudinal sealing, and the air extraction hood is positioned by static friction between the sealing element (41) and the liquid guide tube (22); the top of the air extraction hood (4) is provided with a spring (42), the upper end of the spring (42) presses against the bottom of the positioning support (81), so that the spring (42) supports the air extraction hood (4) downwards, and the lower end of the air extraction hood (4) is provided with The conical flared part (44) is adapted to the outer wall of the conical surface at the top of the liquid collection bottle (3), and an annular groove (441) is provided on the inner wall of the flared part at the lower end of the suction hood. A sealing ring (442) is provided in the groove (441). The lifting device drives the funnel to descend through the lifting support rod and elastically presses the suction hood (4), so that the conical flared part (44) of the suction hood is sealed by the sealing ring against the conical surface at the top of the liquid collection bottle (3).

2. The vacuum filtration apparatus for catalyst preparation as described in claim 1, characterized in that, The base (1) is provided with a placement seat (9) for positioning the bottom of the liquid collection bottle (3).

3. The vacuum filtration apparatus for catalyst preparation as described in claim 1, characterized in that, The lifting device includes a lifting frame (5), a servo motor (6), and a lead screw (7). The lead screw (7) rotates longitudinally inside the lifting frame (5). The lead screw (7) is driven to rotate by the servo motor (6) located at the top of the lifting frame (5). A threaded block (71) is threaded onto the lead screw (7). A lifting support rod (8) is connected to one side of the threaded block (71). The lifting support rod (8) passes through the side wall of the lifting frame (5) and has a sliding opening (51) longitudinally opened on the side wall of the lifting frame (5).

4. The vacuum filtration apparatus for catalyst preparation as described in claim 3, characterized in that, The width of the sliding opening (51) is adapted to the width of the lifting support rod (8).

5. The vacuum filtration apparatus for catalyst preparation as described in claim 1, characterized in that, The support part (21) has a ring-shaped groove (211) on the middle side wall, and the positioning support (81) has a ring-shaped protrusion (811) on the inner wall. The protrusion (811) and the groove (211) cooperate to realize the installation and positioning between the support part (21) and the positioning support (81).

6. The vacuum filtration apparatus for catalyst preparation as described in claim 1, characterized in that, The top center of the exhaust hood (4) is provided with a sleeve (43), which is sleeved on the liquid guide tube (22), and the inner wall of the sleeve (43) is also attached to the outer wall of the liquid guide tube (22) through a sealing ring (442).

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