Phosphorous acid filter

Abstract

The utility model provides a phosphorous acid filtering machine, which comprises a machine body, a material inlet is arranged at the top of the machine body, a chute assembly and a filtering assembly are arranged in the machine body, the chute assembly comprises a chute body, the chute body is arranged on the inner wall of the machine body, the chute body is fixedly connected with the material inlet, two flow dividing pieces are arranged at the bottom end of the chute body, and the flow dividing pieces are connected with the filtering assembly. The filtering assembly comprises a filtering box and a filtering barrel, the filtering box is movably installed on the inner wall of one side of the machine body, and a box body extends towards the interior of the machine body to the position below a pipe opening of one flow dividing piece; a recycling chamber is further arranged between the outer wall of the filtering barrel and the inner wall of the machine body, a connecting pipe and a power mechanism are further arranged at the top of the filtering barrel, the power mechanism drives the filtering barrel to rotate automatically, a vertical plate is arranged at the bottom in the filtering barrel in the radial direction, a backflow pipe is further arranged on one side of the recycling chamber, and a discharging port is further formed in one side outside the bottom end of the machine body. While solid-liquid separation of phosphorous acid crystallization mixed liquid is completed, crystals with different masses and sizes are separated.

Description

Technical Field

[0001] The utility model relates to the field of phosphorous acid production, in particular to a phosphorous acid filter. Background Art

[0002] Phosphorous acid is an inorganic compound with the chemical formula H 3 PO 3 It is a white crystalline powder, easily soluble in water and ethanol, slowly oxidized into orthophosphoric acid in the air, and decomposed into orthophosphoric acid and phosphine when heated to 180°C. It is mainly used as a raw material for manufacturing plastic stabilizers, and is also used in the manufacture of synthetic fibers and phosphites. A filtering device is required in the production process of phosphorous acid.

[0003] After phosphorous acid crystallizes in the crystallization kettle, a solid-liquid mixture is formed. The material needs to be transported to a filter for solid-liquid separation. Centrifugal filters are now mostly used to separate phosphorous acid crystals, and then the remaining phosphorous acid solution is transported back to the crystallization kettle for further crystallization. However, most of the centrifugal filters now have only a simple solid-liquid separation effect, and the particle size of phosphorous acid crystals is inconsistent. In subsequent processing, the large and small crystal particles need to be further separated, which increases the production cost. Therefore, it is necessary to provide a filter that can separate the large and small particles of phosphorous acid crystals when filtering phosphorous acid crystals. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a phosphorous acid filter, which solves the problem that when filtering phosphorous acid crystals in a phosphorous acid solution, the prior art cannot separate both large and small crystals at the same time.

[0005] A phosphorous acid filter comprises a body, a feed inlet is arranged at the top of the body, a chute assembly and a filter assembly are arranged in sequence inside the body, the chute assembly comprises a chute body, the chute body is spirally mounted on the inner wall of the body around the axis of the body, the top of the chute body is fixedly connected to the bottom of the feed inlet, the bottom of the chute body is also provided with two diverters, the diverters are connected to the filter assembly, the filter assembly comprises a filter box and a filter barrel, the filter box is movably mounted on the inner wall of one side of the body, and can be displaced radially outwardly along the body, the box extends into the body to the bottom of one of the diverters; the filter barrel is arranged below the chute body, the top of the filter barrel is connected to the bottom of another diverter, a recovery chamber is arranged between the outer wall of the filter barrel and the inner wall of the body, the filter barrel also comprises a connecting pipe and a power mechanism at the top, the power mechanism drives the filter barrel to rotate, the bottom of the filter barrel is radially provided with a vertical plate perpendicular to the bottom surface of the filter barrel, a reflux pipe is arranged on one side of the recovery chamber, and a discharge port is arranged on the outer side of the bottom of the body.

[0006] Furthermore, a pressure reducing valve is provided on the feed inlet, and a baffle is provided on the top of the chute body, and the baffle is tilted to cover one side of the top of the chute body.

[0007] Furthermore, the two diverter parts include a diverter pipe a close to the central axis of the chute body and a diverter pipe b close to the inner wall of the body. The diverter pipe b is overlapped on the top of the filter box and extends inwardly. The pipe mouth of the diverter pipe a narrows and extends to the inside of the top of the connecting pipe.

[0008] Furthermore, a filter screen is provided at the bottom of the filter box, a drainage pipe is provided at the bottom of the filter screen, and the drainage pipe extends to the inside of the recovery chamber.

[0009] Furthermore, the power mechanism includes a servo motor fixedly connected to the inner wall of the body between the filter barrel and the chute body and a pulley coaxially arranged on the top connecting pipe of the filter barrel. The output end of the servo motor is connected to the pulley belt, and the servo motor drives the filter barrel to rotate via the pulley.

[0010] Furthermore, the vertical plate also includes a motor fixedly connected to the outer bottom of the body, the output end of the motor extends vertically along the axis of the bottom of the filter barrel to the inside of the filter barrel and is fixedly connected to the center position of the bottom of the vertical plate, the bottom of the vertical plate is in contact with the inner bottom surface of the filter barrel, and the vertical plate is displaced circumferentially along the inner bottom of the filter barrel under the drive of the motor.

[0011] Furthermore, the discharge port includes a discharge port arranged on one side of the bottom end of the filter barrel and an electric telescopic tube on the outer wall of the body. Both the discharge pipe and the telescopic tube are provided with electronic valves. When the filter barrel stops at a predetermined position, the telescopic end of the electric telescopic tube can be extended into the discharge pipe.

[0012] The principle of the utility model is to use a chute assembly and a filter assembly to separate large and small particles. The material enters the chute assembly through the feed port. Under the action of gravity, the material flows downward along the chute body. Due to the inconsistency of the mass of the large and small phosphorous acid crystals, the crystal mixture with a larger mass volume flows along the outer side of the chute body close to the inner wall of the machine body under the action of gravity and centrifugal force, and the crystal mixture with a smaller mass volume flows along the inner side of the chute body. Then, two diverters are arranged at the bottom of the chute assembly, one of which extends to the top of the filter box and overlaps on it to collect large particle crystals. The phosphorous acid solution flows through the drainage trough. To the recovery chamber; the mixed solution with smaller crystals flows to the filter barrel through another diversion piece, and then the filter barrel is driven by the power mechanism to rotate centrifugally, and the phosphorous acid in the barrel is thrown out of the filter barrel under the centrifugal movement, and the small particles of phosphorous acid crystals remain in the filter barrel. The filtered phosphorous acid solution enters the recovery chamber and returns to the crystallization kettle through the reflux pipe. When the filter barrel is driven by the servo motor to stop at the preset position, the motor at the bottom of the filter barrel drives the vertical plate to move circumferentially along the bottom of the filter barrel at a uniform speed, pushing the crystal particles to move radially, and pushing the crystals out of the filter barrel through the discharge port, thereby completing the solid-liquid separation and separating large and small particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0014] Figure 2 It is a top view of an embodiment of the utility model.

[0015] Figure 3 It is an enlarged view of point A of the present utility model.

[0016] Figure 4 It is an enlarged view of point B of the present utility model.

[0017] Figure 5 It is an enlarged view of point C of the present utility model.

[0018] In the above drawings

[0019] 1. Feed inlet; 11. Pressure reducing valve;

[0020] 2. chute body; 21. baffle; 22. diverter pipe a; 23. diverter pipe b;

[0021] 3. Filter box; 31. Filter screen; 32. Drainage tube;

[0022] 4. Filter barrel; 41. Connecting pipe; 42. Pulley; 43. Servo motor; 44. Discharging pipe; 45. Electric telescopic pipe; 46. Electronic valve;

[0023] 5. Recovery room; 51. Reflux pipe

[0024] 6. Vertical board; 62. Motor. DETAILED DESCRIPTION

[0025] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] A phosphorous acid filter comprises a body, wherein a feed inlet 1 is arranged at the top of the body, a chute assembly and a filter assembly are arranged in sequence inside the body, wherein the chute assembly comprises a chute body 2, which is spirally mounted on the inner wall of the body around the axis of the body and can be displaced radially outwardly of the body, the top of the chute body 2 is fixedly connected to the bottom of the feed inlet 1, and two flow dividers are also arranged at the bottom of the chute body 2; through the above mechanism, a phosphorous acid solid-liquid mixture spirally descends from the chute assembly, and under the factors of gravitational potential energy and the inconsistent quality of different crystals themselves, the crystal mixture of different mass volumes flows evenly and separately from the outside to the inside on the chute assembly, and the crystals with larger mass are offset to the outside of the chute body 2 by centrifugal force, and the crystals with slightly smaller mass are close to the inside of the chute body 2.

[0027] The diverter is connected to the filter assembly, which includes a filter box 3 and a filter barrel 4. The filter box 3 is movably installed on the inner wall of one side of the body, and the box extends into the body to below the outlet of one of the diverters. The filter barrel 4 is arranged below the chute body 2, and the top of the filter barrel 4 is connected to the bottom end of another diverter. A recovery chamber 5 is also provided between the outer wall of the filter barrel 4 and the inner wall of the body. The mixed liquid of crystals with a larger mass volume enters the filter box 3 and is collected through the diverter connected to the filter box 3, and the mixed liquid of crystals with a smaller mass volume is collected by the filter barrel 4 for further processing.

[0028] The filter barrel 4 also includes a connecting pipe 41 at the top and a power mechanism, and the power mechanism drives the filter barrel 4 to rotate. A vertical plate 6 perpendicular to the bottom surface of the filter barrel is radially provided at the bottom of the filter barrel 4, and a reflux pipe 51 is also provided on one side of the recovery chamber 5, and a discharge port is also provided on the outer side of the bottom end of the body. Through the above mechanism, the phosphorous acid crystal mixture in the filter barrel is further separated from the solid and the liquid by the centrifugal effect generated by the rotating filter barrel 4, and the liquid enters the recovery chamber 5, and the crystals with smaller mass and volume are left in the filter barrel 4.

[0029] Furthermore, a pressure reducing valve 11 is provided on the feed inlet 1, and a baffle 21 is provided on the top of the chute body 2. The baffle 21 is tilted to cover one side of the top of the chute body 2. Through the above mechanism, the impact force of the phosphorous acid crystallization mixture entering the chute assembly is controlled. At the same time, the baffle 21 can prevent the phosphorous acid crystallization mixture from splashing around when flowing out of the feed inlet 1.

[0030] Furthermore, the two diverter parts include a diverter pipe a 22 close to the central axis of the chute body and a diverter pipe b 23 close to the inner wall of the body. The diverter pipe b 23 is overlapped on the top of the filter box and extends inward. The pipe mouth of the diverter pipe a 22 is narrowed and extends to the inside of the top of the connecting pipe. Through the above mechanism, the mixed liquid of crystals of different masses that have been separated and flowed on the chute assembly is transported from different diverter pipes to other mechanisms.

[0031] Furthermore, a filter screen 31 is provided at the bottom of the filter box 3, and a drainage pipe 32 is provided at the bottom of the filter screen 31. The drainage pipe 32 extends to the inside of the recovery chamber 5. Through the above mechanism, phosphorous acid crystals with a larger mass volume are collected by the filter box 3, and the filtered phosphorous acid solution is collected again in the recovery chamber 5. Because phosphorous acid still exists in the filtered solution, it needs to be recycled and reused.

[0032] Furthermore, the power mechanism includes a servo motor 43 fixedly connected to the inner wall of the body between the filter barrel 4 and the chute body 2, and a pulley 42 coaxially arranged on the top connecting pipe of the filter barrel 4. The output end of the servo motor 43 is connected to the pulley 42 by a belt. The servo motor 43 drives the filter barrel 4 to rotate through the pulley 42. Through the above mechanism, the filter barrel 4 is provided with rotational power. The pulley connection is more corrosion-resistant than the gear connection, and does not require the application of lubricating oil, thereby avoiding the contamination of the phosphorous acid by the lubricating oil.

[0033] Furthermore, the vertical plate 6 also includes a motor 61 fixedly connected to the outer bottom of the body, the output end of the motor 61 extends vertically along the axis of the bottom of the filter barrel to the inside of the filter barrel 4 and is fixedly connected to the center position of the bottom of the vertical plate 6, the bottom of the vertical plate 6 contacts the inner bottom surface of the filter barrel 4, and the vertical plate 6 is driven by the motor 61 to move circumferentially along the inner bottom of the filter barrel, and the discharge port includes a discharge pipe 44 arranged on one side of the bottom end of the filter barrel and an electric telescopic tube 45 on the outer wall of the body, and the discharge pipe 44 and the telescopic tube 45 are both provided with an electronic valve 46, when the filter barrel 4 stops at a predetermined position, the telescopic end of the electric telescopic tube 45 can be extended into the discharge pipe 44, through the above mechanism, the vertical plate 6 rotates evenly in the filter barrel 5, and the phosphorous acid crystals are pushed to the position of the discharge pipe 44 along the radial direction of the bottom of the filter barrel 4, the discharge pipe 44 is docked with the electric telescopic tube 45, and the phosphorous acid crystals will be slowly pushed out of the filter barrel 4, so that the phosphorous acid crystals in the filter barrel 4 can be automatically taken out, avoiding the need to manually open the filter barrel 4 to take out the phosphorous acid crystals.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A phosphorous acid filter, characterized in that : It includes a body, the top of the body is provided with a feed inlet, and a chute assembly and a filter assembly are sequentially arranged inside the body, the chute assembly includes a chute body, the chute body is spirally installed on the inner wall of the body around the axis of the body, the top of the chute body is fixedly connected to the bottom of the feed inlet, and the bottom of the chute body is also provided with two diverter pieces, the diverter pieces are connected to the filter assembly, the filter assembly includes a filter box and a filter barrel, the filter box is movably installed on the inner wall of one side of the body, and can be displaced radially outwardly along the body, and the box body extends to the inside of the body to below the pipe mouth of one of the diverter pieces; the filter barrel is arranged below the chute body, the top of the filter barrel is connected to the bottom end of another diverter piece, and a recovery chamber is also arranged between the outer wall of the filter barrel and the inner wall of the body, the filter barrel also includes a connecting pipe and a power mechanism at the top, the power mechanism drives the filter barrel to rotate, and a vertical plate perpendicular to the bottom surface of the filter barrel is radially provided at the bottom of the filter barrel, a reflux pipe is also provided on one side of the recovery chamber, and a discharge port is also provided on the outer side of the bottom end of the body.

2. A phosphorous acid filter according to claim 1, characterized in that: The feed inlet is also provided with a pressure reducing valve, and the top of the chute body is also provided with a baffle, which is tilted and covers one side of the top of the chute body.

3. A phosphorous acid filter according to claim 1, characterized in that: The two diverter parts include a diverter pipe a close to the central axis of the chute body and a diverter pipe b close to the inner wall of the body. The diverter pipe b is overlapped on the top of the filter box and extends inwardly. The pipe mouth of the diverter pipe a narrows and extends to the inside of the top of the connecting pipe.

4. A phosphorous acid filter according to claim 1, characterized in that: A filter screen is provided at the bottom of the filter box, a drainage pipe is provided at the bottom of the filter screen, and the drainage pipe extends to the inside of the recovery chamber.

5. A phosphorous acid filter according to claim 1, characterized in that: The power mechanism includes a servo motor fixedly connected to the inner wall of the body between the filter barrel and the chute body and a pulley coaxially arranged on the top connecting pipe of the filter barrel. The output end of the servo motor is connected to the pulley belt, and the servo motor drives the filter barrel to rotate through the pulley.

6. A phosphorous acid filter according to claim 1, characterized in that: The vertical plate also includes a motor fixedly connected to the outer bottom of the body, the output end of the motor vertically extends along the axis of the bottom of the filter barrel to the inside of the filter barrel and is fixedly connected to the center position of the bottom of the vertical plate, the bottom of the vertical plate contacts the inner bottom surface of the filter barrel, and the vertical plate is driven by the motor to move circumferentially along the inner bottom of the filter barrel.

7. A phosphorous acid filter according to claim 1, characterized in that: The discharge port includes a discharge pipe arranged on one side of the bottom end of the filter barrel and an electric telescopic tube on the outer wall of the body. Both the discharge pipe and the telescopic tube are provided with electronic valves. When the filter barrel stops at a predetermined position, the telescopic end of the electric telescopic tube can be extended into the discharge pipe.

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