Device for removing impurities from a dilute slurry of precipitated silica

Abstract

The application relates to a precipitated silica dilute slurry impurity removal device, which relates to the technical field of a silica production device and comprises a dilute slurry buffer tank, the outlet end of the dilute slurry buffer tank is connected with a filter tank, a filter cylinder is rotationally arranged in the filter tank, the outlet end of the filter tank is connected with a dilute slurry storage tank through a strong magnetic iron remover, an impurity guide cylinder is fixedly connected to the outer wall of the filter tank, an unloading cylinder is fixedly connected to the inlet end of the impurity guide cylinder in an upwardly inclined manner, a slag discharge port matched with the inlet end of the unloading cylinder is formed in the side wall of the filter cylinder close to the lower end, a sealing plate is fixedly connected to the side wall of the unloading cylinder in a shape-following mode, and the sealing plate seals the slag discharge port when the sealing plate faces the slag discharge port. The application solves the problem that a small amount of solid particle impurities and iron-containing impurities are generated in the synthesis process of the precipitated silica in a traditional synthesis reaction kettle, and the impurities will affect the product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of silicon dioxide production equipment, specifically to a device for removing impurities from precipitated silicon dioxide slurry. Background Technology

[0002] According to the production method, silica is generally divided into precipitated silica and fumed silica. Most domestic enterprises use the traditional precipitation method to prepare silica, using sodium silicate and sulfuric acid as raw materials. At a certain temperature, the pH value is adjusted to obtain silica precipitate. After filtration and washing to remove impurities, the silica product is finally obtained by spraying and drying.

[0003] Existing preparation methods mostly use reaction vessels to react and mix relevant substances to obtain the corresponding substances. However, in the reaction vessel, the relevant raw materials need to be stirred to achieve the reaction production. However, the current stirring can easily lead to insufficient stirring and a large single flow direction, which cannot make the raw materials well mixed, resulting in severe local acidification and the formation of undispersed gels, thus affecting the product quality.

[0004] A prior art patent, CN217473310U, discloses a solution including a fixed base, a reaction vessel fixedly connected to the top of the fixed base, a hydraulic telescopic rod fixedly connected to the outside of the reaction vessel, a motor fixedly connected to the top of the hydraulic telescopic rod, a rotating shaft inserted into the output end of the motor, a load-bearing block fixedly connected to the outside of the rotating shaft, a limit block fixedly connected to the outside of the load-bearing block, and a protective shell fixedly connected to the outside of the load-bearing block. This synthesis reaction vessel for precipitating silica uses a motor to drive the rotating shaft, which in turn drives a bushing and a stirring blade to rotate. A stepper motor then drives a long shaft, which in turn drives a bevel gear. Through the combined use of the inserted shaft and the barbed stirring head, the stirring direction is changed, allowing the raw materials to be mixed in different directions, avoiding uniform mixing and achieving a more thorough mixing effect.

[0005] The shortcomings of existing technology have gradually become apparent with use, mainly in the following aspects:

[0006] First, the traditional slurry filtration device is a circular vibrating screen, equipped with a 20-mesh screen made of 304 stainless steel wire with a diameter of φ0.4. It filters impurities with the support of a vibrating motor. However, during use, the screen is worn by the slurry, and the broken steel wires enter the slurry, which has a negative impact on product quality.

[0007] Secondly, during the synthesis of precipitated silica in the synthesis reactor, a very small amount of iron-containing impurities will be generated, which will directly affect the product quality.

[0008] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0009] To address the shortcomings of existing technologies, this utility model provides a device for removing impurities from precipitated silica slurry, which solves the problem that a very small amount of solid particulate impurities and iron-containing impurities are generated during the synthesis of precipitated silica in the synthesis reactor in traditional technologies, and these impurities will affect the product quality.

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] A device for removing impurities from a silica slurry includes a slurry buffer tank, the outlet of which is connected to a filter tank. A filter cylinder is rotatably mounted inside the filter tank. The outlet of the filter tank is connected to a slurry storage tank via a strong magnetic separator.

[0012] An impurity guide cylinder is fixedly connected to the outer wall of the filter tank. A discharge cylinder is fixedly connected to the inlet end of the impurity guide cylinder at an angle upward. A slag discharge port matching the inlet end of the discharge cylinder is opened on the side wall near the lower end of the filter cylinder. A sealing plate is fixedly connected to the side wall of the discharge cylinder in a conformal manner. When the slag discharge port is opposite to the sealing plate, the sealing plate closes the slag discharge port.

[0013] As an optimized solution, a support ring is horizontally fixed to the inner wall of the filter tank near the top, and a rotating ring is rotatably supported on the upper surface of the support ring. A plurality of connecting rods are arranged around the outer wall of the filter cartridge, and the other end of the plurality of connecting rods is fixedly connected to the inner ring of the rotating ring.

[0014] As an optimized solution, the strong magnetic separator includes a housing, inside which several strong magnetic rods are horizontally fixed in a matrix, and a cleaning plate is horizontally slidably mounted on the several strong magnetic rods, with scraping holes opened on the cleaning plate corresponding to the strong magnetic rods.

[0015] As an optimized solution, the housing includes two docking shells arranged laterally, several strong magnetic rods are fixedly connected to one of the docking shells, and a support frame is vertically fixed inside the other docking shell, with support holes corresponding to each of the strong magnetic rods on the support frame.

[0016] As an optimized solution, a gap is provided in the middle area of ​​several horizontally arranged strong magnetic rods in a matrix, and a handle is fixed to the side wall of the cleaning plate at the gap position.

[0017] As an optimized solution, the two docking housings are detachably connected by a flange.

[0018] As an optimized solution, the lower surface of the unloading cylinder is provided with a leakage mesh that connects to the inner cavity of the filter tank.

[0019] As an optimized solution, a slide valve is connected to the impurity guide tube.

[0020] As an optimized solution, the lower end of the filter tank is fixedly connected to a discharge cylinder that communicates with its inner cavity.

[0021] As an optimized solution, the upper and lower ends of the housing are respectively fixedly connected to a slurry inlet cylinder and a slurry outlet cylinder that communicate with its internal cavity.

[0022] As an optimized solution, a handle is provided around the upper end of the swivel.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] By setting a collection tank behind the slurry buffer tank, the filter cartridge can be lifted out of the collection tank by the handle, or the filter cartridge can be rotated by the handle. Under normal working conditions, the slag discharge port is aligned with the closed plate. When it is necessary to clean the impurities inside, the filter cartridge is rotated to align the slag discharge port with the slag discharge port. The filtered impurities can be discharged by opening the unloading cylinder slide valve, which is convenient and quick.

[0025] By horizontally arranging several strong magnetic rods in a matrix, the incoming slurry is diverted, increasing the uniformity of contact between the slurry and the strong magnetic rods, and enabling the adsorption of iron-containing impurities inside the slurry.

[0026] The housing includes two docking shells arranged laterally, which facilitates disassembly and assembly, and makes it easy and quick to clean impurities. After disassembly, the cleaning plate can be pulled by the handle, and the iron-containing impurities adhering to the surface of the strong magnetic rod can be scraped to one end by the scraping holes, making it easy for the operator to clean. After cleaning, the cleaning plate can be pushed to the innermost side for standby. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the filter tank of this utility model;

[0030] Figure 3This is a schematic diagram of the structure of the sealing plate of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the strong magnetic separator of this utility model;

[0032] Figure 5 This is a schematic diagram of the cleaning plate of this utility model.

[0033] In the diagram: 1-Slurry buffer tank; 2-Filter tank; 3-Strong magnetic separator; 4-Slurry storage tank; 5-Filter tank; 6-Filter cylinder; 7-Discharge cylinder; 8-Leakage mesh; 9-Impurity guide cylinder; 10-Slide valve; 11-Sealing plate; 12-Slag discharge port; 13-Support ring; 14-Rotating ring; 15-Connecting rod; 16-Handle; 17-Discharge cylinder; 18-Shell; 19-Support frame; 20-Strong magnetic rod; 21-Cleaning plate; 22-Slurry inlet cylinder; 23-Slurry outlet cylinder; 24-Handle. Detailed Implementation

[0034] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0035] like Figures 1 to 5 As shown, the device for removing impurities from precipitated silica slurry includes a slurry buffer tank 1. A filter tank is connected to the outlet end of the slurry buffer tank 1. A filter cylinder 6 is rotatably mounted inside the filter tank. The filter cylinder 6 has a pore size of 1.5 mm. The outlet end of the filter tank is connected to a slurry storage tank 4 via a strong magnetic separator 3.

[0036] An impurity guide cylinder 9 is fixedly connected to the outer wall of the filter tank. A discharge cylinder 7 is fixedly connected to the inlet end of the impurity guide cylinder 9 at an angle upward. A slag discharge port 12 matching the inlet end of the discharge cylinder 7 is opened on the side wall of the filter cylinder 6 near the lower end. A sealing plate 11 is fixedly connected to the side wall of the discharge cylinder 7 in a conformal manner. When the slag discharge port 12 is opposite to the sealing plate 11, the sealing plate 11 closes the slag discharge port 12.

[0037] A support ring 13 is horizontally fixed to the inner wall of the filter tank near the top. A rotating ring 14 is rotatably supported on the upper surface of the support ring 13. Several connecting rods 15 are arranged around the outer wall of the filter cylinder 6. The other end of the connecting rods 15 is fixed to the inner ring of the rotating ring 14. The position between the slag discharge port 12 and the sealing plate 11 can be clearly observed by using the gap between the connecting rods 15.

[0038] The strong magnetic separator 3 includes a housing 18, inside which several strong magnetic rods 20 are horizontally fixed in a matrix. A cleaning plate 21 is horizontally slidably mounted on the several strong magnetic rods 20. The cleaning plate 21 has scraping holes corresponding to the strong magnetic rods 20.

[0039] The housing 18 includes two docking housings arranged laterally. Several strong magnetic rods 20 are fixedly connected to one of the docking housings. A support frame 19 is vertically fixed inside the other docking housing. The support frame 19 has a support hole corresponding to each strong magnetic rod 20.

[0040] A gap is provided in the middle area of ​​several horizontally arranged strong magnetic rods 20 in a matrix, and a handle 24 is fixed to the side wall of the cleaning plate 21 at the gap position.

[0041] The two mating shells are detachably connected by a flange.

[0042] The lower surface of the unloading cylinder 7 is provided with a leakage mesh 8 that connects to the inner cavity of the filter tank.

[0043] A slide gate valve 10 is connected to the impurity guide tube 9.

[0044] The lower end of the filter tank is fixedly connected to a discharge cylinder 17 that communicates with its inner cavity.

[0045] The upper and lower ends of the housing 18 are respectively fixedly connected to a slurry inlet cylinder 22 and a slurry outlet cylinder 23 that communicate with its internal cavity.

[0046] A handle 16 is provided around the upper end of the rotating ring 14.

[0047] The piping connection method in this device is not an innovation of this solution, so it will not be elaborated on here.

[0048] The working principle of this device is as follows:

[0049] By setting a collection tank behind the slurry buffer tank 1, the filter cylinder 6 can be lifted out of the collection tank by the handle 16, or the filter cylinder 6 can be rotated by the handle 16, so that in normal working condition, the slag discharge port 12 is opposite to the closed plate 11. When it is necessary to clean the impurities inside, the filter cylinder 6 is rotated to align the slag discharge port 12 with the slag discharge port 12. The filtered impurities can be discharged by opening the slide valve 10 of the unloading cylinder 7, which is convenient and quick.

[0050] By horizontally arranging several strong magnetic rods 20 in a matrix, the incoming slurry is diverted, the contact uniformity between the slurry and the strong magnetic rods 20 is increased, and iron-containing impurities inside the slurry are adsorbed.

[0051] The housing 18 includes two docking housings arranged laterally, which facilitates disassembly and assembly, and makes it easy and quick to clean impurities. After disassembly, the cleaning plate 21 can be pulled by the handle 24, and the iron-containing impurities adhering to the surface of the strong magnetic rod 20 can be scraped to one end by the scraping holes, making it easy for the operator to clean. After cleaning, the cleaning plate 21 can be pushed to the innermost side for use.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A device for removing impurities from precipitated silica slurry, characterized in that: It includes a slurry buffer tank (1), the outlet end of which is connected to a filter tank, a filter cylinder (6) is rotatably installed in the filter tank, and the outlet end of the filter tank is connected to a slurry storage tank (4) through a strong magnetic separator (3). An impurity guide tube (9) is fixedly connected to the outer wall of the filter tank. A discharge tube (7) is fixedly connected to the inlet end of the impurity guide tube (9) at an angle upward. A slag discharge port (12) matching the inlet end of the discharge tube (7) is opened on the side wall of the filter tube (6) near the lower end. A sealing plate (11) is fixedly connected to the side wall of the discharge tube (7). When the slag discharge port (12) is opposite to the sealing plate (11), the sealing plate (11) closes the slag discharge port (12).

2. The device for removing impurities from precipitated silica slurry according to claim 1, characterized in that: A support ring (13) is horizontally fixed to the inner wall of the filter tank near the top. A rotating ring (14) is rotatably supported on the upper surface of the support ring (13). A number of connecting rods (15) are arranged around the outer wall of the filter cylinder (6). The other end of the connecting rods (15) is fixed to the inner ring of the rotating ring (14).

3. The apparatus for removing impurities from precipitated silica slurry according to claim 1, characterized in that: The strong magnetic separator (3) includes a housing (18), in which several strong magnetic rods (20) are horizontally fixed in a matrix. A cleaning plate (21) is horizontally slidably mounted on the several strong magnetic rods (20), and scraping holes are opened on the cleaning plate (21) corresponding to the strong magnetic rods (20).

4. The apparatus for removing impurities from precipitated silica slurry according to claim 3, characterized in that: The housing (18) includes two docking housings arranged laterally. Several strong magnetic rods (20) are fixed together on one of the docking housings. A support frame (19) is vertically fixed inside the other docking housing. The support frame (19) has a support hole corresponding to each of the strong magnetic rods (20).

5. The apparatus for removing impurities from precipitated silica slurry according to claim 3, characterized in that: A gap is provided in the middle area of ​​several horizontally arranged strong magnetic rods (20) in a matrix, and a handle (24) is fixed to the side wall of the cleaning plate (21) at the gap position.

6. The apparatus for removing impurities from precipitated silica slurry according to claim 4, characterized in that: The two docking housings are detachably connected by a flange.

7. The apparatus for removing impurities from precipitated silica slurry according to claim 1, characterized in that: The lower surface of the unloading cylinder (7) is provided with a leakage mesh (8) that connects to the inner cavity of the filter tank.

8. The apparatus for removing impurities from precipitated silica slurry according to claim 1, characterized in that: A slide valve (10) is connected to the impurity guide tube (9).

9. The apparatus for removing impurities from precipitated silica slurry according to claim 1, characterized in that: The lower end of the filter tank is fixedly connected to a discharge cylinder (17) that communicates with its inner cavity.

10. The apparatus for removing impurities from precipitated silica slurry according to claim 3, characterized in that: The upper and lower ends of the casing (18) are respectively fixedly connected to a slurry inlet cylinder (22) and a slurry outlet cylinder (23) that communicate with its inner cavity.

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