A pre-reactor for hydrofluoric acid

Abstract

The application discloses a pre-reactor for hydrofluoric acid and relates to the technical field of hydrofluoric acid.The pre-reactor comprises a reaction kettle, supporting feet are fixedly installed at the bottom of the reaction kettle, a discharge pipe is fixedly installed at the bottom of the reaction kettle, a top plate is fixedly installed at the top of the reaction kettle, a feeding pipe is fixedly installed at the top of the top plate, and a stirring device is arranged in the reaction kettle, wherein the stirring device comprises a motor one, a rotating shaft one, a gear one, a partition plate, a rotating rod, a gear two and a stirring rod;hydrofluoric acid and dilution materials can be quickly and uniformly mixed through the rotation of the stirring rod, the full contact of the two is ensured, the reaction efficiency and the dilution effect are improved, local overhigh or overlow concentration is avoided, the concentration of the diluted hydrofluoric acid meets the requirements, and the selectivity of the reaction and the purity of the product are improved.

Description

Technical Field

[0001] This invention relates to the field of hydrofluoric acid technology, specifically to a pre-reactor for hydrofluoric acid. Background Technology

[0002] A pre-reactor for hydrofluoric acid is a chemical equipment specifically designed for the processing or preparation of hydrofluoric acid (HF). The main function of the pre-reactor is to pre-treat or pre-react hydrofluoric acid before it enters the main reactor, thereby improving reaction efficiency, reducing side reactions, lowering the risk of equipment corrosion, and ensuring operational safety.

[0003] Patent publication number CN202164111U relates to the field of hydrofluoric acid technology. This patent discloses a hydrofluoric acid pre-reactor. A hollow sub-shaft equipped with a bearing assembly is fixed inside a bearing housing. One end of a horizontal main shaft with helical blades passes through the interior of the hollow sub-shaft, and tapered plates are used to fix the horizontal main shaft at both ends of the hollow sub-shaft, which are then locked with lock nuts. After exiting the hollow sub-shaft, the horizontal main shaft is directly connected to a motor reducer using an elastic pin coupling. Helical blades are mounted on the horizontal main shaft within the mixing and pre-reaction zones of the pre-reactor housing on the other side of the bearing housing. The upper part of the mixing zone of the pre-reactor housing has a feed inlet, and a vent is opened above the pre-reaction zone. The outermost end of the other horizontal main shaft has an open discharge port connected to the hydrofluoric acid reaction converter. Sealing packing and a packing gland are installed on the horizontal main shaft at one end of the mixing zone of the pre-reactor housing, near the bearing assembly. This patent features good overall structural performance and convenient installation and maintenance.

[0004] In the aforementioned patent, a sealing packing and a packing gland are installed on a horizontal main shaft at one end of the mixing zone of the pre-reactor casing, near the bearing assembly. However, it is difficult to fully stir the hydrofluoric acid during dilution, which can easily lead to incomplete dilution and dilution failure. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pre-reactor for hydrofluoric acid, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a pre-reactor for hydrofluoric acid, comprising a reaction vessel, a support foot fixedly installed at the bottom of the reaction vessel, a discharge pipe fixedly installed at the bottom of the reaction vessel, a top plate fixedly installed at the top of the reaction vessel, a feed pipe fixedly installed at the top of the top plate, and a stirring device provided inside the reaction vessel; The stirring device includes a motor, a rotating shaft, a gear, a partition, a rotating rod, a gear, and a stirring rod. The motor is fixedly installed on the outer wall of the reactor. The rotating shaft is fixedly installed at the output end of the motor. The gear is fixedly installed at the end of the rotating shaft away from the output end of the motor. The partition is fixedly installed on the inner wall of the reactor. The rotating rod rotates through the partition. The gear is fixedly installed at the bottom of the rotating rod. The stirring rod is fixedly installed on the circumferential surface of the rotating rod. The motor drives the rotating shaft to start rotating. The rotation of the rotating shaft drives the electric gear to start rotating. The rotation of the gear drives the gear to start rotating. The rotation of the gear drives the rotating rod to start rotating. The rotation of the rotating rod drives the stirring rod to start rotating. The reactor is equipped with a sealing device to prevent overfeeding and a ventilation device for ventilation. The sealing device prevents cross-contamination or abnormal reaction, while the ventilation device reduces harm to operators and the environment.

[0007] According to the above technical solution, the stirring device further includes a hollow block, a sliding plate, and a push rod. The hollow block is fixedly installed on the top of the partition, the sliding plate is slidably installed on the inner wall of the hollow block, and the push rod is fixedly installed on the surface of the sliding plate. Gear 1 meshes with Gear 2, and the stirring rod contacts the push rod. A groove is provided on the top of the partition, and a spring is provided between the sliding plate and the hollow block. The meshing ensures that Gear 1 can drive Gear 2 to rotate when it rotates, and the contact ensures that the stirring rod can push the push rod when it rotates.

[0008] According to the above technical solution, the sealing device includes an electric telescopic rod, a rack, a rotating tube, a gear, and a sliding door. The electric telescopic rod is fixedly installed on the inner wall of the reactor. The rack is fixedly installed at the output end of the electric telescopic rod. The rotating tube rotates through the partition. The gear is fixedly installed on the circumferential surface of the rotating tube. The sliding door is slidably installed in a groove opened at the top of the partition. After the hydrofluoric acid pre-reacting between the reactor and the partition completes the reaction, the electric telescopic rod is activated after the operator confirms that everything is correct. The output end of the electric telescopic rod pushes the rack to move. The movement of the rack drives the gear to rotate. The rotation of the gear drives the rotating tube to rotate. The rotation of the rotating tube drives the sliding door to move. The sliding door moves and opens the discharge port on the partition.

[0009] According to the above technical solution, the sealing device further includes a fixed rod, an inclined rod, a contact rod, and a semi-circular plate. The fixed rod is fixedly installed on the top of the sliding door, the inclined rod is slidably installed on the inner wall of the reactor, the contact rod is slidably installed on the inner wall of the reactor, and the semi-circular plate is rotatably installed on the bottom of the top plate. When the sliding door moves, it drives the fixed rod to start moving. The fixed rod moves and contacts the inclined rod, which then pushes it to start moving upward. The inclined rod moves and contacts the contact rod, which then pushes it to start moving obliquely upward. The contact rod moves and contacts the semi-circular plate, which then starts rotating.

[0010] According to the above technical solution, rack one meshes with gear three, an arc-shaped groove is provided at the bottom of the sliding door, the rotating tube contacts the arc-shaped groove, the surfaces of the fixed rod and the inclined rod that contact each other are both set as inclined surfaces, and the surfaces of the inclined rod and the contact rod that contact each other are both set as inclined surfaces. The meshing ensures that rack one can drive gear three to rotate when it moves, the arc-shaped groove ensures that the rotating tube can drive the sliding door to move when it rotates, the inclined surfaces ensure that the fixed rod can smoothly push the inclined rod when it moves, and the inclined surfaces ensure that the inclined rod can smoothly push the contact rod when it moves.

[0011] According to the above technical solution, the ventilation device includes a ventilation pipe, a rotating plate, a connecting rod, a connecting box, an absorption box, a short rod, a gear four, and a rack two. The ventilation pipe is fixedly installed on the top of the reactor. The rotating plate is rotatably installed on the inner wall of the ventilation pipe. One end of the connecting rod is fixedly installed on the surface of the inclined rod, and the other end of the connecting rod is rotatably installed on the bottom of the rotating plate. The connecting box is fixedly installed on the top of the ventilation pipe. The absorption box is slidably installed inside the connecting box. The short rod is rotatably installed at the front of the absorption box. The gear four is fixedly installed on the circumferential surface of the short rod. The rack two is slidably installed at the front of the absorption box. When the fixed rod moves upward, it drives the connecting rod to move upward. The upward movement of the connecting rod drives the rotating plate to rotate, and the rotation of the rotating plate opens the ventilation channel at the bottom of the ventilation pipe.

[0012] According to the above technical solution, the ventilation device further includes a fixed plate, a second motor, a second rotating shaft, and fan blades. The fixed plate is fixedly installed on the inner wall of the connecting box, the second motor is fixedly installed at the bottom of the fixed plate, the second rotating shaft is fixedly installed at the output end of the second motor, and the fan blades are fixedly installed on the circumferential surface of the second rotating shaft. When the ventilation channel is opened, the operator manually turns on the second motor, which drives the second rotating shaft to start rotating. The rotation of the second rotating shaft drives the fan blades to start rotating, and the fan blades start to blow air outward.

[0013] According to the above technical solution, the fourth gear meshes with the second rack, and a locking block is provided at the front of the connecting box. The meshing ensures that the fourth gear can drive the second rack to rotate while rotating, and the locking block ensures that the second rack can restrict the movement of the absorption box.

[0014] This invention provides a pre-reactor for hydrofluoric acid. It has the following beneficial effects:

[0015] (1) The invention can quickly and evenly mix hydrofluoric acid and diluent materials by rotating the stirring rod, ensuring that the two are in full contact, thereby improving the reaction efficiency and dilution effect. At the same time, it avoids local concentrations that are too high or too low, ensuring that the concentration of hydrofluoric acid after dilution meets the requirements, improving the selectivity of the reaction and the purity of the product. The moving slide pushes the hydrofluoric acid inside the hollow block outward, allowing it to be in full contact with the diluent materials or other reactants, thereby improving the reaction efficiency, avoiding the accumulation of hydrofluoric acid inside the hollow block, ensuring that it is evenly distributed in the reactor, and improving the utilization efficiency of hydrofluoric acid, reducing reaction time and energy consumption, and reducing operating costs.

[0016] (2) The invention ensures that hydrofluoric acid reacts fully with other reactants by moving the sliding door to open the discharge port on the partition, thereby preventing unreacted hydrofluoric acid from entering the next process and affecting product quality, improving the purity and quality of the product, and preventing the leakage or volatilization of unreacted hydrofluoric acid, reducing harm to operators and the environment, and ensuring compliance with environmental regulations.

[0017] (3) The invention seals the bottom of the top plate by rotating and cooperating with the two semi-circular plates to prevent hydrofluoric acid or other reactive substances from flowing into the discharge port during discharge, thus avoiding cross-contamination or abnormal reaction, ensuring that the material flow direction is single during discharge, improving discharge efficiency, and avoiding system fluctuations caused by material backflow or leakage during discharge, thereby improving the stability of the entire production process, reducing energy consumption, and reducing operating costs.

[0018] (4) This invention opens the ventilation channel at the bottom of the ventilation pipe by rotating the plate, so as to promptly discharge the toxic gases that may be released during the discharge process, reduce the harm to operators and the environment, balance the internal and external pressure, prevent equipment damage or safety accidents caused by pressure accumulation, and start to blow air outward by rotating the fan blades, which can accelerate the air flow in the ventilation channel, quickly discharge the harmful gases generated by the volatilization of hydrofluoric acid from the reactor, reduce their accumulation in the reactor, ensure that the harmful gases are discharged quickly and thoroughly, avoid gas stagnation, and absorb most of the harmful substances inside the gas through the absorption box, reduce the direct emission to the environment, ensure compliance with environmental protection regulations, improve the working environment of operators, reduce health risks, and improve work efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the reactor and partition structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the stirring device structure of the present invention; Figure 4 For the present invention Figure 3Enlarged schematic diagram of section A in the middle; Figure 5 This is a cross-sectional schematic diagram of the sealing device structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of section B; Figure 7 This is a cross-sectional schematic diagram of the sliding door and fixed rod structure of the present invention; Figure 8 This is a cross-sectional schematic diagram of the ventilation device structure of the present invention; Figure 9 This is a cross-sectional view of the fixing plate and connecting box structure of the present invention.

[0020] In the diagram: 1. Reactor; 2. Support leg; 3. Discharge pipe; 4. Top plate; 5. Feed pipe; 6. Motor 1; 7. Shaft 1; 8. Gear 1; 9. Partition plate; 10. Rotating rod; 11. Gear 2; 12. Stirring rod; 13. Hollow block; 14. Slide plate; 15. Push rod; 161. Electric telescopic rod; 162. Rack 1; 163. Rotating pipe; 164. Gear 3; 165. Sliding door; 166. Fixed rod; 167. Inclined rod; 168. Contact rod; 169. Semicircular plate; 171. Ventilation pipe; 172. Rotating plate; 173. Connecting rod; 174. Connecting box; 175. Absorption box; 176. Short rod; 177. Gear 4; 178. Rack 2; 179. Fixed plate; 1710. Motor 2; 1711. Shaft 2; 1712. Fan blade. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-9 One embodiment of the present invention is: a pre-reactor for hydrofluoric acid, including a reaction vessel 1, a support foot 2 fixedly installed at the bottom of the reaction vessel 1, a discharge pipe 3 fixedly installed at the bottom of the reaction vessel 1, a top plate 4 fixedly installed at the top of the reaction vessel 1, a feed pipe 5 fixedly installed at the top of the top plate 4, and a stirring device provided inside the reaction vessel 1. The stirring device includes a motor 6, a rotating shaft 7, a gear 8, a partition 9, a rotating rod 10, a second gear 11, and a stirring rod 12. The motor 6 is fixedly installed on the outer wall of the reactor 1, the rotating shaft 7 is fixedly installed on the output end of the motor 6, the gear 8 is fixedly installed on the end of the rotating shaft 7 away from the output end of the motor 6, the partition 9 is fixedly installed on the inner wall of the reactor 1, the rotating rod 10 rotates through the partition 9, the second gear 11 is fixedly installed at the bottom of the rotating rod 10, and the stirring rod 12 is fixedly installed on the circumferential surface of the rotating rod 10. By rotating the stirring rod 12, hydrofluoric acid and diluent materials can be mixed quickly and evenly, ensuring full contact between the two, thereby improving reaction efficiency and dilution effect, while avoiding excessively high or low local concentrations, ensuring that the concentration of diluted hydrofluoric acid meets the requirements, and improving the selectivity of the reaction and the purity of the product.

[0023] The stirring device also includes a hollow block 13, a sliding plate 14, and a push rod 15. The hollow block 13 is fixedly installed on the top of the partition 9. The sliding plate 14 is slidably installed on the inner wall of the hollow block 13. The push rod 15 is fixedly installed on the surface of the sliding plate 14. Gear 11 meshes with gear 2. The stirring rod 12 contacts the push rod 15. A groove is provided on the top of the partition 9. A spring is provided between the sliding plate 14 and the hollow block 13. The meshing ensures that gear 11 can drive gear 2 to rotate when it rotates. The contact ensures that the stirring rod 12 can push the push rod 15 when it rotates.

[0024] In this embodiment, the operation is as follows: First, before starting work, the operator checks the working status of the device. After the operator confirms that everything is in order, hydrofluoric acid is introduced into the reactor 1 through the feed pipe 5. After a measured amount of hydrofluoric acid is introduced, diluent is introduced into the reactor 1 through the feed pipe 5. The hydrofluoric acid and diluent react inside the reactor 1. Then, the operator starts motor 6, which drives shaft 7 to rotate. The rotation of shaft 7 drives gear 8 to rotate, which in turn drives gear 11 to rotate. Gear 11 drives rotating rod 10 to rotate, which in turn drives stirring rod 12 to rotate. The rotation of stirring rod 12 allows for rapid and uniform mixing. Hydrofluoric acid and diluent materials are brought into full contact to improve reaction efficiency and dilution effect, while avoiding excessively high or low local concentrations. This ensures that the diluted hydrofluoric acid concentration meets requirements, improving reaction selectivity and product purity. Simultaneously, the stirring rod 12 rotates and contacts and pushes the push rod 15 to move. The movement of the push rod 15 causes the sliding plate 14 to move, pushing the hydrofluoric acid inside the hollow block 13 outwards, ensuring it comes into full contact with the diluent materials or other reactants. This improves reaction efficiency, prevents hydrofluoric acid from accumulating inside the hollow block 13, ensures its uniform distribution in the reactor, and enhances the utilization efficiency of hydrofluoric acid, reducing reaction time and energy consumption, and lowering operating costs.

[0025] Please see Figures 1-9Based on the above embodiments, in another embodiment of the present invention, the reactor 1 is provided with a sealing device for preventing overfeeding and a ventilation device for ventilation. The sealing device avoids cross-contamination or abnormal reaction, and the ventilation device reduces the harm to operators and the environment.

[0026] The sealing device includes an electric telescopic rod 161, a rack 162, a rotating tube 163, a gear 164, and a sliding door 165. The electric telescopic rod 161 is fixedly installed on the inner wall of the reactor 1. The rack 162 is fixedly installed on the output end of the electric telescopic rod 161. The rotating tube 163 rotates through the partition 9. The gear 164 is fixedly installed on the circumferential surface of the rotating tube 163. The sliding door 165 is slidably installed in a groove opened at the top of the partition 9. The sliding door 165 moves to open the discharge port on the partition 9, ensuring that hydrofluoric acid reacts fully with other reactants, preventing unreacted hydrofluoric acid from entering the next process and affecting product quality, improving the purity and quality of the product, and preventing leakage or volatilization of unreacted hydrofluoric acid, reducing harm to operators and the environment, and ensuring compliance with environmental regulations.

[0027] The sealing device also includes a fixed rod 166, an inclined rod 167, a contact rod 168, and a semi-circular plate 169. The fixed rod 166 is fixedly installed on the top of the sliding door 165, the inclined rod 167 is slidably installed on the inner wall of the reactor 1, the contact rod 168 is slidably installed on the inner wall of the reactor 1, and the semi-circular plate 169 is rotatably installed on the bottom of the top plate 4. The bottom of the top plate 4 is sealed by the mutual rotation of the two semi-circular plates 169, preventing hydrofluoric acid or other reactive substances from flowing into the discharge port during discharge, avoiding cross-contamination or abnormal reaction, ensuring that the material flow direction is single during discharge, improving discharge efficiency, and avoiding system fluctuations caused by material backflow or leakage during discharge, thereby improving the stability of the entire production process, reducing energy consumption, and reducing operating costs.

[0028] Rack 162 meshes with gear 3 164. The bottom of sliding door 165 has an arc-shaped groove. Rotating tube 163 contacts the arc-shaped groove. The surfaces of fixed rod 166 and inclined rod 167 that contact each other are both set as inclined surfaces. The surfaces of inclined rod 167 and contact rod 168 that contact each other are both set as inclined surfaces. The meshing ensures that rack 162 can drive gear 3 164 to rotate when it moves. The arc-shaped groove ensures that rotating tube 163 can drive sliding door 165 to move when it rotates. The inclined surfaces ensure that fixed rod 166 can smoothly push inclined rod 167 when it moves. The inclined surfaces ensure that inclined rod 167 can smoothly push contact rod 168 when it moves.

[0029] The ventilation device includes a ventilation pipe 171, a rotating plate 172, a connecting rod 173, a connecting box 174, an absorption box 175, a short rod 176, a gear four 177, and a rack two 178. The ventilation pipe 171 is fixedly installed on the top of the reactor 1. The rotating plate 172 is rotatably installed on the inner wall of the ventilation pipe 171. One end of the connecting rod 173 is fixedly installed on the surface of the inclined rod 167, and the other end of the connecting rod 173 is rotatably installed on the bottom of the rotating plate 172. The connecting box 174 is fixedly installed on the top of the ventilation pipe 171. The absorption box 175 is slidably installed inside the connecting box 174. The short rod 176 is rotatably installed at the front of the absorption box 175. The gear four 177 is fixedly installed on the circumferential surface of the short rod 176. The rack two 178 is slidably installed at the front of the absorption box 175. The ventilation channel at the bottom of the ventilation pipe 171 is opened by rotating the rotating plate 172, so as to promptly discharge toxic gases that may be released during the discharge process, reduce the harm to operators and the environment, and balance the internal and external pressure to prevent equipment damage or safety accidents caused by pressure accumulation.

[0030] The ventilation device also includes a fixed plate 179, a second motor 1710, a second rotating shaft 1711, and a fan blade 1712. The fixed plate 179 is fixedly installed on the inner wall of the connecting box 174, the second motor 1710 is fixedly installed on the bottom of the fixed plate 179, the second rotating shaft 1711 is fixedly installed on the output end of the second motor 1710, and the fan blade 1712 is fixedly installed on the circumferential surface of the second rotating shaft 1711. By rotating the fan blade 1712, air is blown outward, which can accelerate the airflow in the ventilation channel, quickly discharge the harmful gases generated by the volatilization of hydrofluoric acid from the reactor, reduce their accumulation in the reactor, ensure that the harmful gases are quickly and thoroughly discharged, and avoid gas stagnation.

[0031] Gear 4 177 meshes with rack 2 178. A locking block is provided at the front of the connecting box 174. The meshing ensures that gear 4 177 can drive rack 2 178 to rotate while it is rotating. The locking block ensures that rack 2 178 can restrict the movement of the absorption box 175.

[0032] In this embodiment, after the hydrofluoric acid pre-reacting between reactor 1 and partition 9 has completed its reaction, the operator confirms that everything is correct and then activates the electric telescopic rod 161. The output end of the electric telescopic rod 161 pushes the rack 162 to move. The movement of the rack 162 drives the gear 164 to rotate, which in turn drives the rotating tube 163 to rotate. The rotation of the rotating tube 163 then drives the sliding door 165 to move, opening the discharge port on partition 9. This ensures that the hydrofluoric acid reacts fully with the other reactants, preventing unreacted hydrofluoric acid from entering the next process and affecting product quality, thus improving the purity and quality of the product. Simultaneously, it prevents leakage or volatilization of unreacted hydrofluoric acid, reducing harm to operators and the environment. To ensure compliance with environmental regulations, the sliding door 165 moves while simultaneously moving the fixed rod 166. The fixed rod 166 then contacts and pushes the inclined rod 167 upwards. The inclined rod 167 then contacts and pushes the contact rod 168 upwards at an angle. The contact rod 168 then contacts and pushes the semicircular plate 169 to rotate. Through the mutual rotation of the two semicircular plates 169, the bottom of the top plate 4 is sealed, preventing hydrofluoric acid or other reactive substances from flowing into the discharge port during material discharge. This avoids cross-contamination or abnormal reactions, ensures a single material flow during discharge, improves discharge efficiency, and prevents system fluctuations caused by material backflow or leakage during discharge. This enhances the stability of the entire production process, reduces energy consumption, and lowers operating costs.

[0033] As the fixed rod 166 moves upward, it drives the connecting rod 173 to move upward as well. The upward movement of the connecting rod 173 causes the rotating plate 172 to rotate. The rotation of the rotating plate 172 opens the ventilation channel at the bottom of the ventilation pipe 171, promptly expelling any toxic gases that may be released during the discharge process, reducing harm to operators and the environment. Simultaneously, it balances internal and external pressure, preventing equipment damage or safety accidents caused by pressure buildup. At the start of ventilation, the operator manually starts the second motor 1710, driving the second shaft 1711 to rotate. The rotation of the second shaft 1711 drives the fan blades 1712 to rotate, which in turn blows air outwards, accelerating airflow within the ventilation channel and quickly expelling the harmful gases produced by the volatilization of hydrofluoric acid from the reactor, reducing their accumulation within the reactor and ensuring rapid and thorough removal of harmful gases, preventing gas stagnation and ensuring the elimination of toxic gases. When the gas is discharged through the ventilation channel, it will come into full contact with the absorption box 175. The absorption box 175 will absorb most of the harmful substances inside the gas, reducing direct emissions to the environment and ensuring compliance with environmental regulations. At the same time, it can improve the working environment of operators, reduce health risks, and improve work efficiency. When the absorption box 175 needs to be replaced after the work is completed, the operator manually rotates the short rod 176, which drives the gear four 177 to start rotating. The rotation of the gear four 177 drives the rack two 178 to start moving. The movement of the rack two 178 disengages from the locking block and releases the restriction on the absorption box 175. At this time, the operator can manually pull the absorption box 175 out of the connecting box 174 for cleaning or replacement. After cleaning or replacement, the absorption box 175 is put back into the connecting box 174 and the gear four 177 is rotated again, so that the rack two 178 contacts the locking block to restrict the absorption box 175.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-reactor for hydrofluoric acid, comprising a reaction vessel (1), characterized in that: The bottom of the reactor (1) is fixedly equipped with a support foot (2), the bottom of the reactor (1) is fixedly equipped with a discharge pipe (3), the top of the reactor (1) is fixedly equipped with a top plate (4), the top of the top plate (4) is fixedly equipped with a feed pipe (5), and the reactor (1) is equipped with a stirring device. The stirring device includes a motor (6), a rotating shaft (7), a gear (8), a partition (9), a rotating rod (10), a gear (11), and a stirring rod (12). The motor (6) is fixedly installed on the outer wall of the reactor (1). The rotating shaft (7) is fixedly installed at the output end of the motor (6). The gear (8) is fixedly installed at the end of the rotating shaft (7) away from the output end of the motor (6). The partition (9) is fixedly installed on the inner wall of the reactor (1). The rotating rod (10) rotates through the partition (9). The gear (11) is fixedly installed at the bottom of the rotating rod (10). The stirring rod (12) is fixedly installed on the circumferential surface of the rotating rod (10). The reactor (1) is equipped with a sealing device to prevent overfeeding and a ventilation device for ventilation.

2. The pre-reactor for hydrofluoric acid according to claim 1, characterized in that: The stirring device also includes a hollow block (13), a sliding plate (14), and a push rod (15). The hollow block (13) is fixedly installed on the top of the partition (9). The sliding plate (14) is slidably installed on the inner wall of the hollow block (13). The push rod (15) is fixedly installed on the surface of the sliding plate (14). The first gear (8) meshes with the second gear (11). The stirring rod (12) contacts the push rod (15). A groove is provided on the top of the partition (9). A spring is provided between the sliding plate (14) and the hollow block (13).

3. A pre-reactor for hydrofluoric acid according to claim 2, characterized in that: The sealing device includes an electric telescopic rod (161), a rack (162), a rotating tube (163), a gear (164), and a sliding door (165). The electric telescopic rod (161) is fixedly installed on the inner wall of the reactor (1). The rack (162) is fixedly installed on the output end of the electric telescopic rod (161). The rotating tube (163) rotates through the partition (9). The gear (164) is fixedly installed on the circumferential surface of the rotating tube (163). The sliding door (165) is slidably installed in the groove opened at the top of the partition (9).

4. A pre-reactor for hydrofluoric acid according to claim 3, characterized in that: The sealing device also includes a fixed rod (166), an inclined rod (167), a contact rod (168), and a semi-circular plate (169). The fixed rod (166) is fixedly installed on the top of the sliding door (165), the inclined rod (167) is slidably installed on the inner wall of the reactor (1), the contact rod (168) is slidably installed on the inner wall of the reactor (1), and the semi-circular plate (169) is rotatably installed on the bottom of the top plate (4).

5. A pre-reactor for hydrofluoric acid according to claim 4, characterized in that: The rack (162) meshes with the gear (164), the bottom of the sliding door (165) is provided with an arc groove, the rotating tube (163) contacts the arc groove, the fixed rod (166) and the inclined rod (167) are both set as inclined surfaces on their contact surfaces, and the inclined rod (167) and the contact rod (168) are both set as inclined surfaces on their contact surfaces.

6. A pre-reactor for hydrofluoric acid according to claim 5, characterized in that: The ventilation device includes a ventilation pipe (171), a rotating plate (172), a connecting rod (173), a connecting box (174), an absorption box (175), a short rod (176), a gear four (177), and a rack two (178). The ventilation pipe (171) is fixedly installed on the top of the reactor (1). The rotating plate (172) is rotatably installed on the inner wall of the ventilation pipe (171). One end of the connecting rod (173) is fixedly installed on the surface of the inclined rod (167), and the other end of the connecting rod (173) is rotatably installed on the bottom of the rotating plate (172). The connecting box (174) is fixedly installed on the top of the ventilation pipe (171). The absorption box (175) is slidably installed inside the connecting box (174). The short rod (176) is rotatably installed in front of the absorption box (175). The gear four (177) is fixedly installed on the circumferential surface of the short rod (176). The rack two (178) is slidably installed in front of the absorption box (175).

7. A pre-reactor for hydrofluoric acid according to claim 6, characterized in that: The ventilation device also includes a fixed plate (179), a second motor (1710), a second rotating shaft (1711), and a fan blade (1712). The fixed plate (179) is fixedly installed on the inner wall of the connecting box (174). The second motor (1710) is fixedly installed on the bottom of the fixed plate (179). The second rotating shaft (1711) is fixedly installed on the output end of the second motor (1710). The fan blade (1712) is fixedly installed on the circumferential surface of the second rotating shaft (1711).

8. A pre-reactor for hydrofluoric acid according to claim 7, characterized in that: The fourth gear (177) meshes with the second rack (178), and a locking block is provided at the front of the connecting box (174).

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