Spiral-flow type separation device for sodium fluoride and silicon dioxide

Abstract

The utility model belongs to the technical field of spiral-flow type separation devices, and discloses a spiral-flow type separation device for sodium fluoride and silicon dioxide. The spiral-flow type separation device for sodium fluoride and silicon dioxide comprises a main body, the center position of the upper surface of the main body is fixedly connected with a first driving motor through a first support, and the output end of the first driving motor is fixedly connected with the top end of a first transmission rod. According to the spiral-flow type separation device for the sodium fluoride and the silicon dioxide, the separation efficiency of the sodium fluoride and the silicon dioxide is greatly improved, the product quality of the sodium fluoride is guaranteed, meanwhile, a large amount of mother liquor does not need to be used for circulation in the equipment operation process, and the production energy consumption is effectively reduced; the design of lifting spirals and intercepting plates is additionally arranged in the cyclone separation device, so that the separation speed of sodium fluoride and silicon dioxide is increased, the retention time is shortened, the treatment capacity of the device is improved, and the occupied area of the device is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cyclone separation devices, in particular to a cyclone separation device for sodium fluoride and silicon dioxide. Background Art

[0002] Sodium fluoride is an important fluoride salt, which can be used as a raw material for manufacturing other fluorides or a hydrogen fluoride absorbent in fluorine chemical industry. It is used as a bactericide and insecticide in agriculture, as a wood preservative, water treatment agent, light metal fluoride salt treatment agent, smelting and refining protective agent, and UF3 adsorbent in the nuclear industry. The existing process usually uses sodium fluorosilicate and sodium carbonate for precipitation reaction to prepare it, but a large amount of silicon dioxide precipitates will be precipitated together during the reaction, resulting in some silicon dioxide impurities mixed in the sodium fluoride product, affecting the product quality. How to effectively separate sodium fluoride and silicon dioxide precipitates is the key to determining the quality of sodium fluoride products. The existing process usually uses a double cone separator for separation. According to the differences in density and particle size of the products sodium fluoride and silicon dioxide, and the different sedimentation rates in the gravity field, sodium fluoride mother liquor is used as the separation medium, and the rising speed of the mother liquor is controlled so that the rising speed of the mother liquor is between the sedimentation speeds of the two particles, thereby achieving the separation of sodium fluoride and silicon dioxide.

[0003] However, the existing sodium fluoride double cone separator device generally has the following defects:

[0004] 1. The double cone separator relies on the density difference between sodium fluoride and silicon dioxide, which leads to different sedimentation velocities and achieves separation. However, due to the small difference in density between sodium fluoride and silicon dioxide, the residence time must be extended to ensure sufficient separation effect, which ultimately leads to a small processing capacity of the double cone separator. In order to increase the processing capacity, the size of the equipment must be expanded, so that the double cone separator occupies a large area in actual production applications.

[0005] 2. Since both sodium fluoride and silicon dioxide are insoluble in water and their particles are tiny, the movement between particles is easily affected by the movement of other particles. As a result, when a double-cone separator is used, sodium fluoride and silicon dioxide will inevitably form "peritectes" during the sedimentation process, causing the two particles to agglomerate around each other to form co-sedimentation instead of single particle sedimentation, ultimately resulting in a high content of silicon dioxide impurities in the sodium fluoride product, which seriously affects the product quality.

[0006] 3. The use of double cone separators requires a large amount of mother liquor to provide buoyancy. The separated silica gel suspension passes through a silica filter, then passes through a mother liquor sedimentation tank for static clarification and then returns to the double cone separator for reuse. The cycle of large-scale mother liquor reuse - filtration - static sedimentation leads to a substantial increase in energy consumption in the production process. Utility Model Content

[0007] The utility model aims to provide a cyclone type separation device for sodium fluoride and silicon dioxide, which provides a cyclone type separation device for sodium fluoride and silicon dioxide with small footprint, high separation efficiency and low energy consumption.

[0008] To achieve the above objectives, the utility model is implemented through the following technical solutions: a cyclone separation device for sodium fluoride and silicon dioxide, including a main body, a driving motor 1 is fixedly connected to the center position of the upper surface of the main body through a bracket 1, the output end of the driving motor 1 is fixedly connected to the top of a transmission rod 1, and the bottom end of the transmission rod 1 extends downward into the main body, a spiral blade rod 1 is fixedly installed on the transmission rod 1, and a sand settling channel is provided at the bottom end of the main body, and the sand settling channel is fixedly connected to the main body.

[0009] Preferably, the right side of the sand settling channel is fixedly connected to a driving motor 2 via a bracket 2, the output end of the driving motor 2 is fixedly connected to the right end of a transmission rod 2, and the left end of the transmission rod 2 extends inwardly into the sand settling channel and is fixedly connected to a spiral blade rod 2.

[0010] Through the above technical solution, the diameter of a blade of the spiral blade rod of the present application is 320 mm, and the lifting spiral allows the internal vortex in the cyclone separation process to be completed completely inside the spiral device, thereby accelerating the cyclone separation rate, shortening the residence time, and increasing the processing capacity.

[0011] Preferably, a partition plate is fixedly installed on the inner wall of the main body, a through hole is opened in the center of the partition plate, and the spiral blade rod is located in the through hole. A cutoff plate is arranged on the inner wall of the main body and below the partition plate, and filter screens are fixedly installed on both the front and rear sides of the cutoff plate.

[0012] Through the above technical scheme, the size of the intercepting plate of the present application is 200*50*10 mm. By setting the intercepting plate, the sodium fluoride particles will be captured by the intercepting plate in advance during the external swirling flow, and finally flow into the sand settling pipe, thereby effectively shortening the residence time of sodium fluoride and improving the separation efficiency of sodium fluoride particles.

[0013] Preferably, a feed pipe is fixedly connected to the left side of the main body, and the feed pipe is located below the partition plate.

[0014] Through the above technical solution, the flow direction of the feed pipe of the present application is from left to right, in a radial direction, which provides sufficient centrifugal force for the separation of sodium fluoride during the external cyclonic flow process.

[0015] Preferably, the right side of the main body is fixedly connected with a discharge pipe, and the discharge pipe is located above the partition plate.

[0016] Preferably, a sand discharge valve is fixedly installed on the sand settling channel.

[0017] By adopting the above technical solution, the beneficial effects of the utility model are:

[0018] The cyclone separation device for sodium fluoride and silicon dioxide replaces the existing double-cone separator sedimentation separation method and adopts a cyclone separation method. Relying on the dual forces of the centrifugal force of the cyclone separation and the gravity sedimentation of the sodium fluoride itself, the separation efficiency of sodium fluoride and silicon dioxide is greatly improved, and the product quality of sodium fluoride is guaranteed. At the same time, a large amount of mother liquor does not need to be circulated during the operation of the equipment, which effectively reduces the production energy consumption. The design of the lifting spiral and the intercepting plate is added to the cyclone separation device, which speeds up the separation speed of sodium fluoride and silicon dioxide, shortens the residence time, increases the processing capacity of the device, and effectively reduces the floor space occupied by the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the front view structure of the utility model;

[0021] Figure 3 For this utility model Figure 2 Middle BB section view;

[0022] Figure 4 For this utility model Figure 2 Middle DD section view.

[0023] In the figure: 1. main body; 2. driving motor 1; 3. transmission rod 1; 4. spiral blade rod 1; 5. sand settling channel; 6. driving motor 2; 7. transmission rod 2; 8. spiral blade rod 2; 9. partition plate; 10. through hole; 11. intercepting plate; 12. filter screen; 16. feed pipe; 17. discharge pipe; 18. sand settling discharge valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4The utility model provides a technical solution: a cyclone separation device for sodium fluoride and silicon dioxide, comprising a main body 1, a driving motor 2 is fixedly connected to the center position of the upper surface of the main body 1 through a bracket, the output end of the driving motor 2 is fixedly connected to the top of a transmission rod 3, and the bottom end of the transmission rod 3 extends downward into the main body 1, a spiral blade rod 4 is fixedly installed on the transmission rod 3, a sand settling channel 5 is arranged at the bottom end of the main body 1, and the sand settling channel 5 is fixedly connected to the main body 1.

[0026] The right side of the sand settling channel 5 is fixedly connected to a drive motor 26 through a bracket 2, and the output end 6 of the drive motor 26 is fixedly connected to the right end of a transmission rod 27. The left end of the transmission rod 27 extends inward into the sand settling channel 5 and is fixedly connected to a spiral blade rod 28. The diameter of the spiral blade rod 14 in the present application is 320 mm. The lifting spiral allows the internal vortex in the vortex separation process to be completely completed inside the spiral device, which accelerates the rate of vortex separation, shortens the residence time, and increases the processing capacity.

[0027] A partition plate 9 is fixedly installed on the inner wall of the main body 1, a through hole 10 is opened in the center of the partition plate 9, and the spiral blade rod 4 is located in the through hole 10. A cutoff plate 11 is arranged on the inner wall of the main body 1 and below the partition plate 9, and a filter screen 12 is fixedly installed on the front and rear sides of the cutoff plate 11. The size of the cutoff plate 11 of the present application is 200*50*10 mm. By setting the cutoff plate 11, the sodium fluoride particles will be captured by the cutoff plate in advance during the external vortex flow, and finally flow into the sand settling pipe 5, thereby effectively shortening the residence time of the sodium fluoride and improving the separation efficiency of the sodium fluoride particles.

[0028] The left side of the main body 1 is fixedly connected with a feed pipe 16, and the feed pipe 16 is located below the partition plate 9. The flow direction of the feed pipe 16 in the present application is from left to right, in a radial direction, to provide sufficient centrifugal force for the separation of sodium fluoride during the external cyclonic flow process.

[0029] The right side of the main body 1 is fixedly connected with a discharge pipe 17 , and the discharge pipe 17 is located above the partition plate 9 , and a sand discharge valve 18 is fixedly installed on the sand channel 5 .

[0030] When the cyclone separation device for sodium fluoride and silicon dioxide is working, the sodium fluoride and silicon dioxide slurry enters the main body 1 from the feed pipe 16 in the tangential direction. Under the dual effects of centrifugal force and gravity, the sodium fluoride particles with a larger specific gravity are thrown to the inner wall of the main body, and rotate downward along the trajectory of the spiral line to form an external vortex, and are captured by the intercepting plate 11 on the inner wall and deposited in the sand settling channel 5. The driving motor 2 6 is started and drives the spiral blade rod 2 8 to rotate, and the sand settling discharge valve 18 is opened to transport the sodium fluoride particles with a larger specific gravity out, while the silicon dioxide particles with a lighter specific gravity and water form an internal vortex in the central area. The driving motor 1 2 is started and drives the spiral blade rod 4 to rotate. Under the lifting force of the spiral blade rod 4, they quickly pass through the partition plate 9 and are discharged from the discharge pipe 17, finally realizing the effective separation of sodium fluoride and silicon dioxide.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cyclone separation device for sodium fluoride and silicon dioxide, comprising a main body, characterized in that: A driving motor 1 is fixedly connected to the center of the upper surface of the main body through a bracket 1, the output end of the driving motor 1 is fixedly connected to the top of a transmission rod 1, and the bottom end of the transmission rod 1 extends downward into the main body, a spiral blade rod 1 is fixedly installed on the transmission rod 1, and a sand settling channel is provided at the bottom end of the main body, and the sand settling channel is fixedly connected to the main body; A partition plate is fixedly installed on the inner wall of the main body, a through hole is opened in the center of the partition plate, and the spiral blade rod is located in the through hole. A cutoff plate is arranged on the inner wall of the main body and below the partition plate, and filter screens are fixedly installed on both the front and rear sides of the cutoff plate.

2. A cyclone separation device for sodium fluoride and silicon dioxide according to claim 1, characterized in that: The right side of the sand settling channel is fixedly connected to a second drive motor through a second bracket, the output end of the second drive motor is fixedly connected to the right end of a second transmission rod, and the left end of the second transmission rod extends inwardly into the sand settling channel and is fixedly connected to a second spiral blade rod.

3. A cyclone separation device for sodium fluoride and silicon dioxide according to claim 1, characterized in that: The left side of the main body is fixedly connected with a feed pipe, and the feed pipe is located below the partition plate.

4. A cyclone separation device for sodium fluoride and silicon dioxide according to claim 3, characterized in that: The right side of the main body is fixedly connected with a discharge pipe, and the discharge pipe is located above the partition plate.

5. A cyclone separation device for sodium fluoride and silicon dioxide according to claim 4, characterized in that: A sand discharge valve is fixedly installed on the sand settling channel.

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