Separation system for preparing hydrogen fluoride from fluosilicic acid

Abstract

The invention discloses a separation system for preparing hydrogen fluoride from fluosilicic acid, and relates to the technical field of separation equipment, the separation system comprises a box body and a conveying pipe, liquid is pumped into the box body through the conveying pipe, an inclined plate formed by splicing rectangular plates is arranged in the box body, a stop block protruding out of the upper surface of the rectangular plate is arranged to stop the liquid from forming a swirling vortex, and solid-liquid separation is conducted through centrifugal force. Different from an existing common solid-liquid separation device which is provided with a compact net structure, the solid-liquid separation device has the advantages that liquid is intercepted to form a swirling vortex, solid impurities in the liquid are thrown to the outermost side and are precipitated along the inclined surface of the baffle plate, the baffle plate is periodically driven by the periodic driving part to carry, and precipitated solids are flushed out by using the liquid to realize separation; a net-shaped structure without direct separation in the equipment is not easy to corrode by acid liquor, the separation effect can be regulated and controlled by controlling the flow rate of liquid and the extension height of the baffle, the filter screen does not need to be frequently overhauled and replaced, and the use is more convenient.

Description

Technical Field

[0001] The invention relates to a hydrogen fluoride preparation system and a hydrogen fluoride preparation process, in particular to a separation system for preparing hydrogen fluoride from fluosilicic acid. Background Art

[0002] The process of producing hydrogen fluoride by the fluosilicic acid method requires multiple separation operations. After the reaction of fluosilicic acid and sodium fluoride, the product sodium fluosilicate precipitate needs to be separated from the solution. The solid product sodium sulfate after the reaction of sodium fluosilicate and concentrated sulfuric acid, as well as substances such as sodium fluosilicate that may not have reacted completely, need to be separated through operations such as filtration and washing.

[0003] In the existing technology, solids are often filtered out through a simple filter structure. However, unlike general solid-liquid separation, hydrogen fluoride gas is dissolved in the liquid, which is extremely corrosive to general filter structures. The denser the filter structure, the more susceptible it is to corrosion. Frequent inspection and replacement of the filter structure is required, which increases labor costs and results in a large amount of equipment loss.

[0004] To this end, those skilled in the art have proposed a separation system for producing hydrogen fluoride from fluorosilicic acid, and designed a separation device that can avoid acid corrosion and ensure the filtering effect of solids, which is used for the separation of solids in the hydrogen fluoride and hydrofluoric acid preparation process, reducing the frequency of equipment maintenance and ensuring the separation effect of the equipment. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a separation system for producing hydrogen fluoride from hydrosilicic acid. An inclined sedimentation structure similar to traditional gold panning is designed. The mixed liquid flows along an inclined rectangular plate. During the flow, it encounters a baffle protruding at a certain height above the rectangular plate to generate a vortex. The centrifugal force of the vortex throws the precipitate to the outermost periphery and precipitates along the wedge-shaped structure of the carry plate. The precipitate is then flushed out with the operation cycle of the periodic drive component, thereby realizing the non-destructive separation of the precipitate in the hydrofluoric acid by the equipment.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a separation device, including a box and a delivery pipe, the delivery pipe pumps the reacted hydrofluoric acid mixed liquid into the box, and the hydrofluoric acid after solid-liquid separation is then discharged from the box through the delivery pipe.

[0007] In the existing technology, dense filter mesh structures are usually used for solid-liquid separation. However, hydrofluoric acid is extremely corrosive and can easily cause severe corrosion to the mesh structure, affecting the separation effect and causing serious wear on the filter mesh. To address this issue, technicians in this field have designed separation structures that are not easily affected by corrosion for solid-liquid separation of hydrofluoric acid.

[0008] A mounting slide rail is fixed obliquely on the inner side of the box body, and a rectangular plate is arranged along the mounting slide rail. The mixed liquid pumped into the box body through the delivery pipe flows along the oblique direction of the rectangular plate.

[0009] A gap is reserved between adjacent rectangular plates, and a baffle is provided on the lower surface of the rectangular plate protruding through the gap. The baffle extends through the gap to a certain height of the upper surface of the rectangular plate. When the mixed liquid passes through the baffle, a vortex is formed due to obstruction, and solid impurities in the liquid are precipitated along the baffle under the centrifugal action of the vortex.

[0010] A periodic driving member is provided below the rectangular plate and on one side of the baffle. The periodic driving member periodically moves along the extension direction of the baffle, pushing the baffle downward, and the sediment in the gap is flushed out along with a small amount of mixed liquid, thereby realizing the separation of solid impurities in hydrofluoric acid.

[0011] Preferably, a splicing rod is fixedly connected to the lower surface of the rectangular plate, and multiple rectangular plates are connected end to end through the splicing rod and slidably arranged on the inner side of the installation slide rail. The splicing rod can ensure the stable structure of the rectangular plates relative to each other, avoiding loose installation and causing large-scale leakage of hydrofluoric acid.

[0012] Preferably, a U-shaped block is fixedly connected to the lower surface of the rectangular plate, and a gear is provided on the lower surface of the rectangular plate and located inside the U-shaped block. The splicing rod is engaged with the gear along the U-shaped block. The gear is engaged with the splicing rod, which can not only be used to adjust the spacing between adjacent rectangular plates to adapt to the solid-liquid separation of hydrofluoric acid with different flow rates, but also enhance the splicing stability of multiple rectangular plates.

[0013] Preferably, the gear has a symmetrical splicing rod on one side and a pitch-adjusting rack slidingly provided along the U-shaped block, a first spring is provided on the side of the U-shaped block, and the splicing rod and the pitch-adjusting rack are both tightly engaged with the gear through the first spring.

[0014] The first spring is set to press the spacing rack against the side of the gear to engage with it for driving, so as to synchronously drive multiple rectangular plates to adjust the spacing equidistantly. It is also convenient to insert and install the splicing rod after the rectangular plates are spliced.

[0015] Preferably, a waterproof block is fixedly connected to the U-shaped block corresponding to the side of the pitch-adjustable rack to block the hydrofluoric acid passing through the rectangular plate to avoid corrosion to the gear.

[0016] A mounting cylinder is fixed on the inner wall of the U-shaped block corresponding to the first spring. The mounting cylinder is provided to ensure that the compressed first spring will not be damaged and will not escape from the abutting position.

[0017] One end of the first spring away from the U-shaped block is fixedly connected to a wedge block, and the wedge block is slidably connected to the U-shaped block. Under the action of the wedge block, the splicing rod and the pitch-adjusting rack can be conveniently plugged and installed.

[0018] Preferably, the baffle includes a fixed sleeve, which is fixedly connected to the lower surface of the rectangular plate. A carry plate is slidably provided on the inner side of the fixed sleeve. The carry plate slidably provided on the inner side of the fixed sleeve facilitates adjustment of the height extending from the upper surface of the rectangular plate, and also facilitates the carry drive of the carry plate through the periodic driving component.

[0019] A second spring is provided on the inner side of the fixing sleeve to press against the carry plate. When the periodic driving member passes by, the second spring is pressed against the carry plate to drive the carry plate to perform carry adjustment by compressing the second spring.

[0020] The side of the carry plate is fixedly connected to a shift block corresponding to the periodic driving member. During one movement cycle of the periodic driving member, the periodic driving member pushes the carry plate to carry through the shift block, and after leaving the range of action of the periodic driving member, the elastic force of the second spring quickly restores the set position of the carry plate.

[0021] Preferably, the end of the second spring away from the carry plate is fixedly connected to a slider, and the slider is slidably connected to the fixed sleeve. By adjusting the installation position of the slider on the inner side of the fixed sleeve, the potential energy loss of the second spring can be compensated. In addition, the height of the carry plate protruding from the upper surface of the rectangular plate can also be adjusted.

[0022] The side of the slider is fixedly connected with a screw rod, which passes through the side wall of the fixed sleeve and is slidably connected thereto. The screw rod passes through the side of one end of the side wall of the fixed sleeve and is threadedly connected to a fastening nut. The slider is positioned by the friction between the fastening nut and the side wall of the fixed sleeve.

[0023] Preferably, a protrusion is fixedly connected to the side of the slider, and the protrusion passes through the side wall of the fixed sleeve and is fixedly connected to a connecting plate. The periodic driving member is set to slide in the vertical direction along the side of the connecting plate, and the adjustment setting of the height of the carry plate associated with the periodic driving member is provided by the connecting plate fixed to the slider, thereby ensuring the accurate carry adjustment effect of the periodic driving member on the carry plate.

[0024] Preferably, the periodic driving member includes a screw rod, which passes through the connecting plate and is slidably connected thereto. The screw rod is used to adjust the overall setting height of the periodic driving member relative to the advance plate, thereby ensuring that the periodic driving member accurately controls the advance distance of the advance plate.

[0025] The side surface of the screw rod is fixedly connected with a mounting plate, the side surface of the mounting plate is provided with a crawler track through motor engagement, and the side surface of the crawler track is fixedly connected with a push block corresponding to the shift block.

[0026] The overall setting height of the periodic drive member can be adaptively adjusted along with the screw, and the motor periodically drives the push block to move and push the advance plate to advance, thereby flushing out the solids trapped by the baffle to achieve separation.

[0027] A separation system for producing hydrogen fluoride from fluosilicic acid is equipped with the above-mentioned separation equipment and is used for solid-liquid separation of highly corrosive hydrofluoric acid. It can avoid the problem that the dense filter structure is easily corroded by hydrofluoric acid, which not only requires frequent maintenance and replacement but also affects the separation use. Most of the plates used in this equipment are equipped with interception structures at the vulnerable structures to avoid the influence of hydrofluoric acid, making it more suitable for solid-liquid separation of highly corrosive acid solutions.

[0028] The present invention discloses a separation system for preparing hydrogen fluoride from fluosilicic acid, which has the following beneficial effects: 1. This separation system for producing hydrogen fluoride from fluorosilicic acid is different from the existing general solid-liquid separation equipment that is equipped with a dense mesh structure. In this equipment, a vortex is formed by intercepting the liquid, and solid impurities in the liquid are thrown to the outermost side and precipitated along the inclined surface of the baffle. The baffle is then periodically driven by a periodic drive component to advance, and the precipitated solids are flushed out by the liquid to achieve separation. The mesh structure without direct separation in the equipment is not easily corroded by the acid, and the separation effect can also be adjusted by controlling the liquid flow rate and the extension height of the baffle. Frequent maintenance and replacement of the filter screen is unnecessary, making it more convenient to use.

[0029] 2. The separation system for producing hydrogen fluoride from fluorosilicic acid uses a liquid flow channel constructed by splicing multiple rectangular plates to separate the acidic liquid. This facilitates the control of the spacing between adjacent rectangular plates and is combined with baffles that can adjust the height of the protruding upper surface of the rectangular plates to control the eddy current intensity generated during liquid flow, thereby achieving control of the size of the separated solid particles.

[0030] 3. In the separation system for producing hydrogen fluoride from fluorosilicic acid, the periodic drive member is arranged via a slider associated with a baffle, and an adjustable installation method is also adopted, so that when the elastic coefficient of the second spring changes, it can be supplemented by adjustment.

[0031] 4. In the separation system for producing hydrogen fluoride from fluorosilicic acid, the rectangular plates are connected and installed through splicing rods, and gears and pitch-adjustable racks are provided to synchronously control the spacing between the multiple rectangular plates, which facilitates the simultaneous adjustment of multiple eddy current positions. In addition, the splicing rods and the pitch-adjustable racks are both meshed and installed by pressing the wedge block pressed by the first spring against the gear, which not only facilitates the combined installation of the structure, but also facilitates adjustment and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure below the rectangular plate of the present invention; Figure 3 Schematic diagram of the connection and driving structure of the rectangular plate of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure at center A; Figure 5 Schematic diagram of the baffle structure of the present invention; Figure 6 This is a schematic diagram of the structure of the periodic drive component of the present invention.

[0034] In the figure: 1. Box body; 2. Conveying pipe; 3. Rectangular plate; 4. Baffle; 401. Fixed sleeve; 402. Carrying plate; 403. Second spring; 404. Shift block; 5. Periodic drive member; 501. Screw; 502. Mounting plate; 503. Track; 504. Push block; 6. Mounting rail; 7. Splicing rod; 8. U-shaped block; 9. Gear; 10. Pitch-adjusting rack; 11. First spring; 12. Waterproof block; 13. Mounting cylinder; 14. Wedge block; 15. Slider; 16. Screw; 17. Fastening nut; 18. Bump; 19. Connecting plate. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] The embodiment of the present invention discloses a separation system for preparing hydrogen fluoride from fluosilicic acid; According to the attached Figure 1 and attached Figure 2 As shown, it includes a box body 1 and a delivery pipe 2. The delivery pipe 2 pumps the hydrofluoric acid mixed liquid after the reaction into the box body 1, and the hydrofluoric acid after solid-liquid separation is then guided out of the box body 1 through the delivery pipe 2.

[0037] In the existing technology, dense filter mesh structures are usually used for solid-liquid separation. However, hydrofluoric acid is extremely corrosive and can easily cause severe corrosion to the mesh structure, affecting the separation effect and causing serious wear on the filter mesh. To address this issue, technicians in this field have designed separation structures that are not easily affected by corrosion for solid-liquid separation of hydrofluoric acid.

[0038] A mounting rail 6 is fixed obliquely on the inner side of the box body 1 , and a rectangular plate 3 is arranged along the mounting rail 6 . The mixed liquid pumped into the box body 1 through the delivery pipe 2 flows along the oblique direction of the rectangular plate 3 .

[0039] A gap is reserved between adjacent rectangular plates 3, and a baffle 4 is provided on the lower surface of the rectangular plate 3 protruding through the gap. The baffle 4 extends through the gap to a certain height of the upper surface of the rectangular plate 3. When the mixed liquid passes through the baffle 4, a vortex is formed due to the obstruction, and the solid impurities in the liquid are precipitated along the baffle 4 under the centrifugal action of the vortex.

[0040] A periodic driving member 5 is provided below the rectangular plate 3 and on one side of the baffle 4. The periodic driving member 5 moves periodically along the extension direction of the baffle 4, pushing the baffle 4 downward. The sediment in the gap is flushed out along with a small amount of mixed liquid, thereby realizing the separation of solid impurities in hydrofluoric acid.

[0041] According to the attached Figure 2 , Attachment Figure 3 and attached Figure 4 As shown, the lower surface of the rectangular plate 3 is fixedly connected with a splicing rod 7, and multiple rectangular plates 3 are connected end to end through the splicing rod 7 and slidably arranged on the inner side of the installation slide rail 6. The splicing rod 7 can ensure the stable structure between the collars 3 to avoid loose installation and large-scale leakage of hydrofluoric acid.

[0042] A U-shaped block 8 is fixedly connected to the lower surface of the rectangular plate 3. A gear 9 is provided on the lower surface of the rectangular plate 3 and located inside the U-shaped block 8. The splicing rod 7 is meshed with the gear 9 along the U-shaped block 8. The gear 9 is arranged to mesh with the splicing rod 7, which can not only be used to adjust the spacing between adjacent rectangular plates 3 to adapt to the solid-liquid separation of hydrofluoric acid with different flow rates, but also enhance the splicing stability of multiple rectangular plates 3.

[0043] The gear 9 is symmetrically connected to the splicing rod 7 on one side and is provided with a pitch-adjusting rack 10 sliding along the U-shaped block 8. A first spring 11 is provided on the side of the U-shaped block 8. The splicing rod 7 and the pitch-adjusting rack 10 are tightly engaged with the gear 9 through the first spring 11.

[0044] A first spring 11 is provided to press the spacing rack 10 against the side of the gear 9 to engage with it for driving, thereby synchronously driving multiple rectangular plates 3 to adjust the spacing equidistantly. In addition, it is also convenient to insert and install the splicing rod 7 after the rectangular plates 3 are spliced.

[0045] A waterproof stopper 12 is fixedly connected to the side of the pitch-adjusting rack 10 corresponding to the U-shaped block 8 to block the hydrofluoric acid passing through the rectangular plate 3 to avoid corrosion to the gear 9.

[0046] A mounting tube 13 is fixed to the inner wall of the U-shaped block 8 corresponding to the first spring 11 . The mounting tube 13 is provided to ensure that the compressed first spring 11 will not be damaged and will not be separated from the abutting position.

[0047] One end of the first spring 11 away from the U-shaped block 8 is fixedly connected to a wedge block 14 , and the wedge block 14 is slidably connected to the U-shaped block 8 . Under the action of the wedge block 14 , the splicing rod 7 and the spacing rack 10 can be easily plugged and installed.

[0048] According to the attached Figure 5 As shown, the baffle 4 includes a fixed sleeve 401, which is fixedly connected to the lower surface of the rectangular plate 3. A carry plate 402 is slidably arranged on the inner side of the fixed sleeve 401. The carry plate 402 slidably arranged on the inner side of the fixed sleeve 401 facilitates the adjustment of the height extending from the upper surface of the rectangular plate 3, and also facilitates the carry drive of the carry plate 402 through the periodic driving part 5.

[0049] A second spring 403 is provided inside the fixing sleeve 401 to press against the carrying plate 402 . The second spring 403 presses against the carrying plate 402 , and when the periodic driving member 5 passes by, the carrying plate 402 is driven to perform a carrying adjustment by compressing the second spring 403 .

[0050] The side of the carry plate 402 is fixedly connected to the periodic driving member 5 with a shift block 404. During one movement cycle of the periodic driving member 5, the periodic driving member 5 pushes the carry plate 402 to carry through the shift block 404, and after leaving the range of action of the periodic driving member 5, the elastic force of the second spring 403 quickly restores the set position of the carry plate 402.

[0051] The end of the second spring 403 away from the carry plate 402 is fixedly connected to the slider 15, and the slider 15 is slidably connected to the fixed sleeve 401. By adjusting the installation position of the slider 15 on the inner side of the fixed sleeve 401, the potential energy loss of the second spring 403 can be compensated. In addition, the height of the carry plate 402 protruding from the upper surface of the rectangular plate 3 can also be adjusted.

[0052] According to the attached Figure 6 As shown, a screw rod 16 is fixedly connected to the side of the slider 15, and the screw rod 16 passes through the side wall of the fixed sleeve 401 and is slidably connected thereto. The screw rod 16 passes through the side of one end of the side wall of the fixed sleeve 401 and is threadedly connected to a fastening nut 17. The slider 15 is positioned by the friction between the fastening nut 17 and the side wall of the fixed sleeve 401.

[0053] The side of the slider 15 is fixedly connected with a protrusion 18, which passes through the side wall of the fixed sleeve 401 and is fixedly connected with a connecting plate 19. The periodic driving member 5 is set to slide in the vertical direction along the side of the connecting plate 19. The connecting plate 19 fixed to the slider 15 provides an adjustment setting for the height of the carry plate 402 associated with the periodic driving member 5, thereby ensuring the accurate carry adjustment effect of the periodic driving member 5 on the carry plate 402.

[0054] The periodic drive member 5 includes a screw 501, which passes through the connecting plate 19 and is slidably connected thereto. The screw 501 is used to adjust the overall setting height of the periodic drive member 5 relative to the carry plate 402 to ensure that the periodic drive member 5 accurately controls the carry distance of the carry plate 402.

[0055] The side of the screw rod 501 is fixedly connected to a mounting plate 502 , the side of the mounting plate 502 is provided with a crawler 503 through motor engagement, and the side of the crawler 503 is fixedly connected to a push block 504 corresponding to the shift block 404 .

[0056] The overall setting height of the periodic drive member 5 can be adaptively adjusted along with the screw 501. The motor periodically drives the push block 504 to move and push the advance plate 402 to advance, thereby flushing out the solids trapped by the baffle 4 to achieve separation.

[0057] The separation system equipped with the above separation equipment is used for solid-liquid separation of highly corrosive hydrofluoric acid. It can avoid the problem that the dense filter structure is easily corroded by hydrofluoric acid, which not only requires frequent maintenance and replacement, but also affects the separation use. Most of the plates used in this equipment are equipped with interception structures at the vulnerable structures to avoid the influence of hydrofluoric acid, which is more suitable for solid-liquid separation of highly corrosive acid solutions.

[0058] This separation system for producing hydrogen fluoride from fluorosilicic acid is different from existing general solid-liquid separation equipment that is equipped with a dense mesh structure. In this equipment, a vortex is formed by intercepting the liquid, and solid impurities in the liquid are thrown to the outermost side and precipitated along the inclined surface of the baffle 4. The baffle 4 is then periodically driven by a periodic driving member 5 to advance, and the precipitated solids are flushed out by the liquid to achieve separation. The mesh structure without direct separation in the equipment is not easily corroded by the acid liquid, and the separation effect can also be adjusted by controlling the liquid flow rate and the extension height of the baffle 4. Frequent maintenance and replacement of the filter screen is unnecessary, making it more convenient to use.

[0059] Furthermore, a liquid flow channel composed of multiple rectangular plates 3 is used to separate the acidic liquid, which facilitates the control of the spacing between adjacent rectangular plates 3. The baffle 4 with an adjustable height of the upper surface of the protruding rectangular plate 3 is used to control the eddy current intensity generated during the liquid flow, thereby achieving control of the size of the separated solid particles.

[0060] Furthermore, the periodic drive member 5 is associated with the installation of the baffle 4 through the slider 15, and an installation method with adjustable installation height is also adopted. When the elastic coefficient of the second spring 403 changes, the elasticity of the second spring 403 can be supplemented by adjusting the overall installation height of the periodic drive member 5.

[0061] Furthermore, the rectangular plates 3 are connected and installed through the splicing rod 7, and a gear 9 and a pitch-adjustable rack 10 are provided to synchronously control the spacing between the multiple rectangular plates 3, so as to facilitate the simultaneous adjustment of multiple eddy current positions. In addition, the splicing rod 7 and the pitch-adjustable rack 10 are both meshed and installed by the wedge block 14 pressed against the gear 9 by the first spring 11, which not only facilitates the combined installation of the structure, but also facilitates adjustment and use.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen fluoride separation system, comprising a housing (1) and a delivery pipe (2), wherein the delivery pipe (2) pumps a mixed liquid into the housing (1) for solid-liquid separation and then discharges the mixed liquid, characterized in that: A rectangular plate (3) is provided obliquely on the inner side of the box body (1); a baffle (4) is provided at the lower position of gravity of the rectangular plate (3); and a periodic driving member (5) is provided below the rectangular plate (3) and on one side of the baffle (4); The mixed liquid pumped into the box (1) through the delivery pipe (2) flows along the inclined direction of the rectangular plate (3), and a gap is reserved between adjacent rectangular plates (3). The baffle (4) extends through the gap to a certain height of the upper surface of the rectangular plate (3). When the mixed liquid passes through the baffle (4), a vortex is formed due to obstruction. Solid impurities in the liquid are precipitated along the baffle (4) under the centrifugal action of the vortex. The periodic driving member (5) periodically moves along the extension direction of the baffle (4), pushing the baffle (4) downward to advance, and the sediment is flushed out along with a small amount of mixed liquid.

2. The hydrogen fluoride separation system according to claim 1, wherein: A mounting rail (6) is fixedly provided on the inner side of the box body (1) at an angle, a splicing rod (7) is fixedly connected to the lower surface of the rectangular plate (3), and a plurality of rectangular plates (3) are connected end to end via the splicing rod (7) and are slidably provided on the inner side of the mounting rail (6).

3. The hydrogen fluoride separation system according to claim 2, wherein: A U-shaped block (8) is fixedly connected to the lower surface of the rectangular plate (3); a gear (9) is provided on the lower surface of the rectangular plate (3) and located inside the U-shaped block (8); and the splicing rod (7) is meshed and connected with the gear (9) along the U-shaped block (8).

4. The hydrogen fluoride separation system according to claim 3, wherein: The gear (9) is symmetrically connected to a splicing rod (7) on one side and is provided with a pitch-adjusting rack (10) slidingly arranged along the U-shaped block (8). A first spring (11) is provided on the side of the U-shaped block (8). The splicing rod (7) and the pitch-adjusting rack (10) are both tightly meshed with the gear (9) via the first spring (11).

5. The hydrogen fluoride separation system according to claim 4, wherein: A waterproof stopper (12) is fixedly connected to the side surface of the pitch-adjusting rack (10) corresponding to the U-shaped block (8), a mounting cylinder (13) is fixedly connected to the inner wall of the U-shaped block (8) corresponding to the first spring (11), and a wedge-shaped block (14) is fixedly connected to the end of the first spring (11) away from the U-shaped block (8), and the wedge-shaped block (14) is slidably connected to the U-shaped block (8).

6. The hydrogen fluoride separation system according to claim 1, wherein: The baffle (4) comprises a fixed sleeve (401), the fixed sleeve (401) being fixedly connected to the lower surface of the rectangular plate (3), a carry plate (402) being slidably provided on the inner side of the fixed sleeve (401), a second spring (403) being provided on the inner side of the fixed sleeve (401) pressing against the carry plate (402), and a shift block (404) being fixedly connected to the side surface of the carry plate (402) corresponding to the periodic driving member (5).

7. The hydrogen fluoride separation system according to claim 6, wherein: The end of the second spring (403) away from the carry plate (402) is fixedly connected to a slider (15), and the slider (15) is slidably connected to the fixed sleeve (401). The side of the slider (15) is fixedly connected to a screw rod (16), and the screw rod (16) passes through the side wall of the fixed sleeve (401) and is slidably connected thereto. The screw rod (16) passes through the side wall of one end of the fixed sleeve (401) and is threadedly connected to a fastening nut (17).

8. The hydrogen fluoride separation system according to claim 7, wherein: A protrusion (18) is fixedly connected to the side of the slider (15), and the protrusion (18) passes through the side wall of the fixed sleeve (401) and is fixedly connected to the connecting plate (19). The periodic driving member (5) is slidably arranged along the vertical direction of the side of the connecting plate (19).

9. The hydrogen fluoride separation system according to claim 8, wherein: The periodic driving member (5) comprises a screw (501), the screw (501) passing through the connecting plate (19) and being slidably connected thereto, a side surface of the screw (501) being fixedly connected to a mounting plate (502), a side surface of the mounting plate (502) being provided with a crawler (503) engaged by a motor, and a side surface of the crawler (503) being fixedly connected to a push block (504) corresponding to the shifting block (404).

10. A separation system for preparing hydrogen fluoride from fluosilicic acid, characterized by: A hydrogen fluoride separation system according to any one of claims 1 to 9 is installed and used for solid-liquid separation of highly corrosive hydrofluoric acid.

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