Device and process for the continuous production of sodium fluorosilicate

Abstract

The application relates to the technical field of sodium fluorosilicate preparation, in particular to a device for continuously producing sodium fluorosilicate, which comprises a precipitation tank, a high-position tank one, a high-position tank two, a reaction box, a dissolving tank one and a dissolving tank two, a joint is fixed to the upper end surface of the precipitation tank, the precipitation tank is communicated with the high-position tank one through a pipeline, the bottom of the high-position tank one and the high-position tank two is communicated with the reaction box through a pipeline, and the high-position tank two is communicated with the dissolving tank one and the dissolving tank two through a pipeline; a stirring mechanism is arranged in the reaction box, the stirring mechanism comprises a stirring cavity which is arranged in the reaction box, and a sealing plate is screw-connected to the front end surface of the reaction box; the application is provided with the stirring mechanism and the crushing assembly; during the mixing reaction, block materials are generated; at this moment, the rotating speed of the motor is slowed down; the stirring blades are intermittently magnetically attracted through the electromagnets; the stirring blades are slightly displaced on the surface of the rotating shaft; and the block materials between the adjacent stirring blades are extruded and crushed.

Description

An apparatus and process for continuous production of sodium fluorosilicate Technical Field

[0001] This invention relates to the field of sodium fluorosilicate preparation technology, and in particular to an apparatus and process for continuous production of sodium fluorosilicate. Background Technology

[0002] Sodium fluorosilicate is an inorganic compound, belonging to the category of complex salts. It is the most widely used fluorosilicate in the construction and building materials industry. It is mainly used as a flux in enamel, a glass opaque agent, a coagulant for acid-resistant mortar and acid-resistant concrete, and a wood preservative. In the pesticide industry, it is used to manufacture insecticides. Sodium fluorosilicate can be obtained by reacting fluorosilicic acid wastewater with sodium sulfate.

[0003] Chinese Patent CN216654580U discloses a reaction vessel for preparing sodium fluorosilicate, including a load-bearing base. Two fixed support blocks are welded to the top of the base, and two support plates are fixedly connected to the top of each support block. The four support plates are arranged in pairs, and a fixed shaft is welded between opposite sides of each pair of support plates. In this invention, by connecting the power to the first drive motor, the first shaft drives two transmission belts to rotate via a rotating sleeve, causing the entire reaction vessel shell to rotate together. Combined with the load-bearing rollers inside the two fixed shafts, the reaction vessel shell can rotate smoothly. Then, by connecting the power to the second drive motor, the second shaft stirs the solution inside the reaction vessel through the rotation of corrosion-resistant blades, achieving double stirring during the reaction process and preventing internal clumping.

[0004] Although the device can perform dual stirring, the agglomeration of raw materials in the solution reaction is still unavoidable during the stirring process. It is also unable to effectively deal with the agglomerated material, thereby reducing the efficiency of the device reaction and the quality of the product. In addition, material may adhere to the stirring blades during the stirring reaction. If the stirring blades are not treated regularly, their own weight will increase, increasing the burden on the drive motor, and will also cause corrosion damage to the stirring blades.

[0005] Therefore, an apparatus and process for the continuous production of sodium fluorosilicate are proposed. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus and process for the continuous production of sodium fluorosilicate, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an apparatus for continuous production of sodium fluorosilicate, comprising a precipitation tank, a high-level tank I, a high-level tank II, a reaction tank, a dissolving tank I, and a dissolving tank II, wherein the upper end face of the precipitation tank is fixed with a joint, and the precipitation tank is connected to the high-level tank I through a pipeline; the bottoms of the high-level tank I and the high-level tank II are connected to the reaction tank through pipelines; and the high-level tank II is connected to the dissolving tank I and the dissolving tank II through a pipeline.

[0008] The reaction chamber is equipped with a stirring mechanism, which includes a stirring chamber inside the reaction chamber. A sealing plate is screwed to the front end of the reaction chamber. A rotating shaft is rotatably connected inside the stirring chamber. A motor is fixed to the left end of the reaction chamber, and the motor output shaft is fixed to the rotating shaft. Stirring blades are movably connected to the outside of the rotating shaft in a ring at equal intervals. A crushing component is provided between two adjacent stirring blades, and a cleaning component is provided on the surface of each stirring blade.

[0009] Preferably, the stirring mechanism includes a suction chamber located at the right end of the stirring chamber, and the stirring chamber and the suction chamber are connected. A valve is provided between the stirring chamber and the suction chamber, and the high-level tank one and the high-temperature tank two are connected to the stirring chamber.

[0010] Preferably, an electromagnet is embedded in the upper part of the reaction chamber, and the stirring blades are made of magnetic metal material, with an anti-corrosion coating sprayed on the outside of the stirring blades.

[0011] Preferably, a number of vibrating balls are fixed at equal intervals inside the stirring chamber on one side of the electromagnet, and the vibrating balls are connected and fixed to the inner wall of the stirring chamber by a connecting piece made of elastic metal material.

[0012] Preferably, the crushing component includes annular movable grooves at both ends of the stirring shaft, and five sets of partitions are fixed at equal intervals in the annular movable grooves to form six sets of sliding grooves. A slider is slidably connected inside the sliding groove. The upper end of the slider is fixed to the stirring blade, and spring pieces are fixed between the two sides of the slider and the partition.

[0013] Preferably, the slider and the groove are designed in a cross shape and cannot be separated, and the widths of the slider and the groove are matched.

[0014] Preferably, the cleaning component includes a scraper with a rectangular structure, the scraper being sleeved on the surface of the stirring blade, and guide grooves being provided at both ends of the stirring blade. A guide block is slidably connected inside the guide groove, the guide block being fixed to the scraper, and protrusions are distributed on the outer side of the scraper.

[0015] Preferably, wire brushes are screwed to both the upper and lower sides of the scraper, and the wire brushes are attached to the surface of the stirring blade.

[0016] Preferably, the stirring blade has a hollow mesh structure design, and a gap is reserved between one end of the stirring blade and the inner wall of the stirring chamber.

[0017] A stirring process for a continuous sodium fluorosilicate production unit includes the following steps:

[0018] S1: The solution and raw materials are discharged into the stirring chamber. The motor is started by conducting electricity to drive the rotating shaft to rotate, which drives the stirring blades to stir and mix the materials in the stirring chamber.

[0019] S2: During the mixing reaction, lumpy materials will be generated. At this time, the motor rotation speed is slowed down. The stirring blades, in conjunction with the electromagnet, intermittently conduct electromagnetic attraction, forcing the stirring blades to move slightly on the surface of the rotating shaft, which crushes the lumpy materials located between adjacent stirring blades.

[0020] S3: During the long-term operation of the stirring blade, impurities will adhere to its surface. By changing the rotational displacement angle of the stirring blade, the cleaning component designed to be sleeved on the surface of a single stirring blade will move up and down to scrape and clean the surface dirt and impurities.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This application designs a stirring mechanism in conjunction with a crushing component. During the mixing reaction, lumpy materials are generated. At this time, the motor rotation speed is slowed down, and the stirring blades are used in conjunction with the electromagnet to intermittently conduct electromagnetic attraction, forcing the stirring blades to move slightly on the surface of the rotating shaft, thereby squeezing and crushing the lumpy materials located between adjacent stirring blades.

[0023] 2. Based on the crushing component, this application designs a cleaning mechanism. During the long-term operation of the stirring blade, impurities will adhere to its surface. By changing the rotational displacement angle of the stirring blade, the cleaning component designed to be sleeved on the surface of a single stirring blade will move up and down to scrape and clean the surface dirt and impurities. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention 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. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 is an overall structural view of the present invention;

[0026] Figure 2 is a top cross-sectional view of the reaction chamber of the present invention;

[0027] Figure 3 is a left-side cross-sectional view of the reaction chamber of the present invention;

[0028] Figure 4 is a structural view of the stirring shaft and stirring blades of the present invention;

[0029] Figure 5 is a structural view of the groove and slider of the present invention;

[0030] Figure 6 is a structural view of the scraper and stirring blade of the present invention;

[0031] Figure 7 is a structural view of the scraper and wire brush of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Sedimentation tank; 2. Connector; 3. High-level tank one; 4. High-level tank two; 5. Reaction chamber; 6. Dissolving tank one; 7. Dissolving tank two; 8. Stirring mechanism; 81. Motor; 82. Stirring chamber; 83. Stirring blades; 84. Stirring shaft; 85. Suction chamber; 86. Valve; 87. Crushing assembly; 871. Slide groove; 872. Sliding block; 873. Spring; 874. Scraper; 875. Guide block; 876. Guide groove; 877. Wire brush; 88. Electromagnet; 89. Vibrating ball. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please refer to Figures 1 to 7. The present invention provides a technical solution:

[0036] An apparatus for continuous production of sodium fluorosilicate includes a precipitation tank 1, a high-level tank 3, a high-level tank 4, a reaction tank 5, a dissolving tank 6, and a dissolving tank 7. The upper end face of the precipitation tank 1 is fixed with a connector 2, and the precipitation tank 1 is connected to the high-level tank 3 through a pipeline. The bottom of the high-level tank 3 and the high-level tank 4 are connected to the reaction tank 5 through a pipeline. The high-level tank 4 is connected to the dissolving tank 6 and the dissolving tank 7 through a pipeline.

[0037] The reaction chamber 5 is equipped with a stirring mechanism 8, which includes a stirring chamber 82 located inside the reaction chamber 5. A sealing plate is screwed to the front end of the reaction chamber 5. A rotating shaft is rotatably connected inside the stirring chamber 82. A motor 81 is fixed to the left end of the reaction chamber 5, and the output shaft of the motor 81 is fixed to the rotating shaft. Stirring blades 83 are movably connected to the outside of the rotating shaft at equal intervals in a ring. A crushing component 87 is provided between two adjacent stirring blades 83, and a cleaning component is provided on the surface of each stirring blade 83. The stirring mechanism 8 includes a suction chamber 85 located at the right end of the stirring chamber 82, and the stirring chamber 82 and the suction chamber 85 are connected. A valve 86 is provided between the stirring chamber 82 and the suction chamber 85. The high-level tank 3 and the high-temperature tank 2 are connected to the stirring chamber 82.

[0038] By adopting the above technical solution, this application designs a stirring mechanism 8 in conjunction with a crushing component 87. During the mixing reaction, blocky materials are generated. At this time, the rotation speed of the motor 81 is slowed down. The stirring blades 83, in conjunction with the electromagnet 88, intermittently conduct electromagnetic attraction, forcing the stirring blades 83 to move slightly on the surface of the rotating shaft, thereby squeezing and crushing the blocky materials located between adjacent stirring blades 83.

[0039] Specifically, as shown in Figure 3, an electromagnet 88 is embedded in the upper part of the stirring chamber 82 of the reaction box 5, and the stirring blade 83 is made of magnetic metal. The stirring blade 83 is coated with an anti-corrosion coating. Several oscillating balls 89 are fixed at equal intervals on one side of the electromagnet 88 inside the stirring chamber 82, and the oscillating balls 89 are connected and fixed to the inner wall of the stirring chamber 82 by a connecting piece of elastic metal material.

[0040] By adopting the above technical solution, the electromagnet 88 intermittently conducts electromagnetic attraction to the stirring blades 83 passing below. When the electromagnet conducts and generates magnetic force to attract the stirring blades 83, the stirring blades 83 rotate and shift on the surface of the rotating shaft under the magnetic attraction force. Then, another set of stirring blades 83 gradually approaches the direction of the magnetically attracted stirring blades 83 as the rotating shaft rotates. At this time, the clumps of material located between the two stirring blades 83 can be crushed by the compression of the two sets of stirring blades 83. Then, the electromagnet 88 is de-energized, and the stirring blades 83 reset and continue to rotate with the rotating shaft, contacting the oscillating ball 89 and squeezing the oscillating ball 89. At this time, the oscillating ball 89 is fixed by the elastic metal connecting piece, so the connecting piece elastically deforms and stores energy until the stirring blades 83 continue to rotate with the rotating shaft and detach from the oscillating ball 89. At the moment of detachment, the oscillating ball 89 collides with the stirring blades 83 under the elastic reset of the connecting piece and the action of its own gravity and inertia, causing the stirring blades 83 to vibrate and peel off as much impurity material as possible from the stirring blades 83.

[0041] Specifically, as shown in Figures 4 and 5, the crushing component 87 includes annular movable grooves opened at both ends of the stirring shaft 84, and five sets of partitions are fixed at equal intervals in the annular movable grooves to form six sets of sliding grooves 871. A slider 872 is slidably connected inside the sliding groove 871. The upper end of the slider 872 is fixed to the stirring blade 83, and spring pieces 873 are fixed between the two sides of the slider 872 and the partitions. The slider 872 and the sliding groove 871 are designed in a cross shape and cannot be separated. The width of the slider 872 and the sliding groove 871 are matched.

[0042] By adopting the above technical solution, based on the above content, when the electromagnet 88 conducts electromagnetic attraction to the stirring blade 83, the rotating shaft continues to rotate, while the slider 872 connected to the stirring blade 83 is relatively displaced inside the groove 871. During the displacement of the slider 872, it will pull one side of the spring plate 873 and squeeze the other side of the spring plate 873. The elasticity is for the purpose of facilitating the subsequent reset of the slider 872 and the stirring blade 83. After the electromagnet 88 is de-energized, the stirring blade 83 is elastically reset under the action of the spring plate 873.

[0043] Specifically, as shown in Figures 4, 6, and 7, the cleaning component includes a rectangular scraper 874, which is sleeved on the surface of the stirring blade 83. Guide grooves 876 are provided at both ends of the stirring blade 83. Guide blocks 875 are slidably connected inside the guide grooves 876 and are fixed to the scraper 874. Protrusions are distributed on the outer surface of the scraper 874. Wire brushes 877 are screwed to both the upper and lower sides of the scraper 874 and are attached to the surface of the stirring blade 83. The stirring blade 83 has a hollow mesh structure, and a gap is reserved between one end of the stirring blade 83 and the inner wall of the stirring chamber 82.

[0044] By adopting the above technical solution, during operation, when the stirring blade 83 gradually approaches the upper position of the stirring chamber 82 as the rotating shaft rotates, the scraper 874 sleeved on the surface of the stirring blade 83 gradually moves downward on the surface of the scraper 874 until it reaches the bottom of the stirring blade 83 through the sliding connection between the guide block 875 and the guide groove 876. At this time, the scraper 874 can scrape the surface of the stirring blade 83 during the displacement process, cleaning the surface deposits. When the scraper 874 is located at the bottom of the stirring blade 83, it can also play a role in squeezing and crushing the agglomerated materials in conjunction with the protrusions on both sides, realizing the material crushing and auxiliary mixing reaction.

[0045] A stirring process for a continuous sodium fluorosilicate production unit includes the following steps:

[0046] S1: The solution and raw materials are discharged into the stirring chamber 82. The motor 81 is electrically started to drive the rotating shaft to rotate, which drives the stirring blades 83 to stir and mix the materials in the stirring chamber 82.

[0047] S2: During the mixing reaction, lumpy materials are generated. At this time, the rotation speed of the motor 81 is slowed down. Through the intermittent electromagnetic attraction of the stirring blades 83 and the electromagnet 88, the stirring blades 83 are forced to move slightly on the surface of the rotating shaft, crushing the lumpy materials located between adjacent stirring blades 83. When the electromagnet 88 intermittently attracts the stirring blades 83 below, the magnetic force attracts the stirring blades 83. Under the magnetic attraction, the stirring blades 83 rotate and move on the surface of the rotating shaft. Then, another set of stirring blades 83 gradually approaches the direction of the magnetically fixed stirring blades 83 as the rotating shaft rotates. At this time, the lumpy materials located between the two stirring blades 83 can be crushed by the two sets of stirring blades 83. Then, the electromagnet 88 is de-energized. At this time, the stirring blades 83 reset and continue to rotate with the rotating shaft, contacting the oscillating ball 89 and crushing the oscillating ball 89. At this time, the oscillating ball 89 is fixed by the connecting piece made of elastic metal. Therefore, the connecting piece elastically deforms and stores energy until the stirring blade 83 continues to rotate with the shaft and detaches from the oscillating ball 89. At the moment of detachment, the oscillating ball 89 collides with the stirring blade 83 under the elastic reset of the connecting piece and the action of its own gravity and inertia, causing the stirring blade 83 to oscillate and peel off as much impurities as possible from the stirring blade 83. When the electromagnet 88 conducts electromagnetic attraction to the stirring blade 83, the shaft continues to rotate, and the slider 872 connected to the stirring blade 83 is relatively displaced inside the groove 871. During the displacement of the slider 872, it will pull one side of the spring piece 873 and squeeze the other side of the spring piece 873. The elasticity is for the purpose of facilitating the subsequent reset of the slider 872 and the stirring blade 83. After the electromagnet 88 is de-energized, the stirring blade 83 is elastically reset under the action of the spring piece 873.

[0048] Specifically, as shown in Figures 4, 6, and 7, the cleaning component includes a rectangular scraper 874, which is sleeved on the surface of the stirring blade 83. Guide grooves 876 are provided at both ends of the stirring blade 83. Guide blocks 875 are slidably connected inside the guide grooves 876. The guide blocks 875 are fixed to the scraper 874. Protrusions are distributed on the outer side of the scraper 874. Wire brushes 877 are screwed to both the upper and lower sides of the scraper 874 and are attached to the surface of the stirring blade 83. The stirring blade 83 has a hollow mesh structure design, and a gap is reserved between one end of the stirring blade 83 and the inner wall of the stirring chamber 82.

[0049] S3: During the long-term operation of the stirring blade 83, impurities will adhere to its surface. By changing the rotational displacement angle of the stirring blade 83, the cleaning component designed on the surface of the individual stirring blade 83 moves up and down to scrape and clean the surface dirt and impurities. During operation, when the stirring blade 83 gradually approaches the upper position of the stirring chamber 82 as the rotating shaft rotates, the scraper 874 sleeved on the surface of the stirring blade 83 gradually moves downward on the surface of the scraper 874 until it reaches the bottom of the stirring blade 83 through the sliding connection between the guide block 875 and the guide groove 876. At this time, the scraper 874 can scrape the surface of the stirring blade 83 during the displacement process to clean the surface deposits. When the scraper 874 is at the bottom of the stirring blade 83, it can also act as a crushing and breaking action for agglomerated materials in conjunction with the protrusions on both sides, realizing the crushing and mixing reaction of materials. When the stirring blade 83 gradually moves downward as it rotates, the scraper 874 extends the rotation angle and slides downward on the surface of the scraper 874 to scrape and clean.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. An apparatus for continuous production of sodium fluorosilicate, comprising a precipitation tank (1), a high-level tank one (3), a high-level tank two (4), a reaction tank (5), a dissolving tank one (6), and a dissolving tank two (7), characterized in that: The upper end face of the sedimentation tank (1) is fixed with a connector (2), and the sedimentation tank (1) is connected to the first high-level tank (3) through a pipe. The bottom of the first high-level tank (3) and the second high-level tank (4) are connected to the reaction tank (5) through a pipe. The second high-level tank (4) is connected to the first dissolving tank (6) and the second dissolving tank (7) through a pipe. The reaction tank (5) is equipped with a stirring mechanism (8), which includes a stirring chamber (82) opened in the reaction tank (5). The front end face of the reaction tank (5) is screwed with a sealing plate. The stirring chamber (82) is rotatably connected with a rotating shaft. The left end of the reaction tank (5) is fixed with a connector (2). A motor (81) is fixed, and the output shaft of the motor (81) is fixed to the rotating shaft. Stirring blades (83) are movably connected to the outer annular space of the rotating shaft. A crushing component (87) is provided between two adjacent stirring blades (83), and a cleaning component is provided on the surface of each stirring blade (83). The stirring mechanism (8) includes a suction chamber (85) opened at the right end of the stirring chamber (82), and the stirring chamber (82) and the suction chamber (85) are connected. A valve (86) is provided between the stirring chamber (82) and the suction chamber (85). The high-level tank one (3) and the high-temperature tank two are connected to the stirring chamber (82). The reaction An electromagnet (88) is embedded in the upper part of the mixing chamber (82) of the box (5), and the stirring blades (83) are made of magnetic metal. The stirring blades (83) are coated with an anti-corrosion coating. Several vibrating balls (89) are fixed at equal intervals on one side of the electromagnet (88) inside the mixing chamber (82), and the vibrating balls (89) are connected and fixed to the inner wall of the mixing chamber (82) by elastic metal connecting pieces. The crushing component (87) includes annular movable grooves opened at both ends of the stirring shaft (84), and five sets of partitions are fixed at equal intervals in the annular movable grooves to form six sets of sliding grooves (871). The slide groove (871) is internally connected to a slider (872), the upper end of which is fixed to the stirring blade (83), and the two sides of the slider (872) are fixed to the partition plate with spring pieces (873); the cleaning component includes a scraper (874) with a rectangular structure, the scraper (874) is sleeved on the surface of the stirring blade (83), and the two ends of the stirring blade (83) are provided with guide grooves (876), the guide grooves (876) are internally connected to guide blocks (875), the guide blocks (875) are fixed to the scraper (874), and the outer side of the scraper (874) is distributed with protrusions.

2. The apparatus for continuous production of sodium fluorosilicate according to claim 1, characterized in that: The slider (872) and the groove (871) are designed in a cross shape and cannot be separated. The widths of the slider (872) and the groove (871) are matched.

3. The apparatus for continuous production of sodium fluorosilicate according to claim 2, characterized in that: The scraper (874) is screwed with wire brushes (877) on both the upper and lower sides, and the wire brushes (877) are attached to the surface of the stirring blade (83).

4. The apparatus for continuous production of sodium fluorosilicate according to claim 3, characterized in that: The stirring blade (83) has a hollow mesh structure design, and a gap is reserved between one end of the stirring blade (83) and the inner wall of the stirring chamber (82).

5. A stirring process applicable to a continuous sodium fluorosilicate production apparatus according to any one of claims 1-4, characterized in that, The process includes the following steps: S1: The solution and raw materials are discharged into the stirring chamber (82), and the motor (81) is electrically activated to drive the rotating shaft to rotate, which drives the stirring blades (83) to stir and mix the materials in the stirring chamber (82); S2: During the mixing reaction, lumpy materials will be generated. At this time, the rotation speed of the motor (81) is slowed down. Through the intermittent electromagnetic attraction of the stirring blades (83) and the electromagnet (88), the stirring blades (83) are forced to move slightly on the surface of the rotating shaft, which crushes the lumpy materials located between adjacent stirring blades (83); S3: During the long-term operation of the stirring blades (83), impurities will be attached to their surface. Through the change of the rotation displacement angle of the stirring blades (83), the cleaning component designed to be sleeved on the surface of a single stirring blade (83) moves up and down to scrape and clean the surface dirt and impurities.

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