Intermediate reactor in hydrogen fluoride production

Abstract

The present application relates to hydrogen fluoride production equipment field, specifically to a kind of intermediate reactor of hydrogen fluoride production, be arranged between pre-reactor and rotary reaction furnace.The present application is aimed at fine granularity fluorite powder easy dry agglomeration, reaction is not sufficient, HF gas guide is not smooth and gas channeling corrosion, equipment maintenance difficult and other problems.The reactor includes large V type gas guide pusher box, the lower arc section in it is equipped with pusher screw for scattering and pushing material, and the upper portion is equipped with gas guide port;It is integrally installed on trolley and can be independently removed;Adopt dynamic and static ring end face rotary mechanical seal, and it is compressed by cylinder and spring assembly;Polytetrafluoroethylene bellows expansion joint compensates rotary reaction furnace axial expansion and contraction;Electric lubrication system lubricates sliding shaft sleeve.The present application integrates gas guide, scattering, pushing, sealing, expansion and compensation and quick maintenance function, effectively avoids material agglomeration, improves calcium fluoride reaction rate, gas guide is smooth to prevent gas channeling, sealing is reliable, greatly shortens maintenance downtime, and improves equipment start-up rate.

Description

Technical Field

[0001] This invention relates to the field of hydrogen fluoride production technology and equipment, and more specifically, to an intermediate reactor for hydrogen fluoride production. Background Technology

[0002] The fluorite-sulfuric acid process is currently the mainstream technology for producing anhydrous hydrogen fluoride. However, fluorite reserves are limited, requiring full reaction utilization to reduce the residual calcium fluoride content in the fluorine residue. Simultaneously, large quantities of low-grade fluorite powder and fluorine-containing waste (extremely small particle size, reaching 500-800 mesh) generated by industries such as photovoltaics, copper smelting, and new energy urgently need to be recycled.

[0003] Existing technologies, such as CN 218872200 U, disclose a pre-reactor with certain stirring and anti-caking functions. However, in practice, it has been found that after the fine fluorite powder and mixed sulfuric acid partially react inside the pre-reactor, they easily dry and form lumps. Directly falling into the rotary reactor results in poor heat transfer and an unsatisfactory overall reaction rate. Furthermore, the pre-reactor lacks an effective gas guiding structure; the generated HF gas must first enter the rotary reactor and then be discharged, leading to poor gas guiding, reduced HF yield, and the gas easily introduces cross-contamination into the fluorite powder, corroding equipment and even causing pollution. Simultaneously, the pre-reactor and the gas guiding pipe are connected parallel to each other at the small end cap of the furnace head; these two sets of mechanisms are bulky, severely impacting the workload of furnace internals maintenance and downtime. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide an intermediate reactor for hydrogen fluoride production, which addresses the problems in existing hydrogen fluoride production where fine-grained fluorite powder (500-800 mesh) and fluorine-containing waste dry and agglomerate in the pre-reactor, resulting in poor heat transfer, incomplete reaction, and high residual calcium fluoride in the fluorine residue after entering the rotary reactor. Furthermore, the pre-reactor lacks an effective gas guiding structure, requiring HF gas to be discharged through the rotary reactor, leading to poor gas guiding, reduced HF yield, and easy introduction of cross-contamination gas into the fluorite powder, causing equipment corrosion and environmental pollution. In addition, the pre-reactor and gas guiding pipe are connected parallel to the small end cap of the furnace head, resulting in a bulky structure, limited maintenance space for furnace components, long downtime, and low uptime. The invention achieves the technical effects of improving calcium fluoride reaction rate, ensuring smooth gas guiding and preventing cross-contamination, facilitating maintenance and increasing uptime, and providing a compact structure with integrated functions and reliable sealing and lubrication.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an intermediate reactor for hydrogen fluoride production, disposed between a pre-reactor and a rotary reactor, comprising: The air-guided material pusher box has a large V-shaped cross-section, with a material trough composed of small-diameter arc segments at the bottom and an air vent at the top. The feeding screw, concentrically positioned within the arc segment, is used to break up the material and push it into the rotary reactor. The trolley is used to carry the gas guide and feed box and the feed screw, so that the entire intermediate reactor can be moved and withdrawn independently. A static sealing assembly is fitted onto the part of the gas guide and pusher box that extends into the rotary reactor, and its end is provided with a static sealing ring. The dynamic sealing ring is installed on the rotating furnace head end cover and is tightly fitted with the static sealing ring to form a rotating mechanical seal on the end faces of the dynamic and static rings; The drive assembly, which includes a cylinder assembly and a spring assembly, is distributed circumferentially along the air guide and push box and is used to press the static sealing assembly. The expansion joint flange is welded to the air guide and pusher box; A polytetrafluoroethylene corrugated expansion joint is fitted outside the gas guide and pusher box. One end of the expansion joint is connected to the gas guide and pusher box, and the other end is connected to the static sealing assembly. It is used to compensate for the axial expansion and contraction of the rotary reactor.

[0006] Furthermore, the pre-reactor is connected to the feed port on the upper part of the first end cover of the gas guide and pusher box, and is supported by an independent trolley. The discharge port of the pre-reactor is set close to the gas guide port, and the end of the discharge port does not exceed the edge of the pipe wall of the gas guide port.

[0007] Furthermore, the main body is welded from explosive composite plates, with its inner wall being C-276 Hastelloy plate and its base plate being Q245R steel plate; the part of the gas guide and pusher box that extends into the rotary reactor is covered with Hastelloy plate to form a circular cross-section cylinder, while the part located outside the rotary reactor is a circular cross-section cylinder formed by carbon steel plates.

[0008] Furthermore, a saddle support is provided at the lower part of the carbon steel circular cross-section of the gas guide and pusher box body. The saddle is installed on the pusher trolley, and a pusher screw is arranged concentrically with the small arc cross-section. The screw shaft passes through the second end cover installed at the lower part of the end cover of the gas guide and pusher box and is supported by the self-aligning roller bearing in the first bearing assembly. The other end is supported by the inner sliding sleeve and the outer sliding sleeve. The inner end of the screw shaft in the reactor has a guide cone. The inner sliding sleeve and the outer sliding sleeve are installed on the sleeve welded in the middle of four X-shaped Hastelloy first support tubes.

[0009] Furthermore, the portion of the spiral shaft located inside the air guide and material pusher box is a seamless Hastelloy main shaft tube. A round hole is drilled on the main shaft tube for inserting and welding a second Hastelloy support tube. Hastelloy fan-shaped blades are welded onto the second support tube.

[0010] Furthermore, the intermediate reactor for hydrogen fluoride production also includes a lubrication pipeline of an electric lubrication system that passes sequentially through the end cover of the gas guide and pusher box, the cavity two between the carbon steel circular cross-section cylinder and the large V-shaped gas guide and pusher box body, the support rib, the cavity three between the Hastelloy plate circular cross-section cylinder and the large V-shaped gas guide and pusher box body, and the cavity four inside the Hastelloy first support tube, and finally connects to the connector two on the sleeve to inject grease into the annular groove and grease distribution hole of the outer sliding sleeve.

[0011] Furthermore, the PTFE bellows expansion joint is fitted onto the outside of the Hastelloy plate circular cross-section cylinder of the gas guide and pusher box. One end of the expansion joint is locked onto the expansion joint flange, and the other end is locked onto the static sealing assembly. The static sealing assembly consists of a sealing seat and a static sealing ring holding a PTFE dust baffle ring. Its lower part is supported by a support roller. The PTFE dust baffle ring is fitted onto the Hastelloy plate circular cross-section cylinder and slides along with it.

[0012] Furthermore, the rear of the pusher trolley is equipped with a detachable fixing device to keep the entire intermediate reactor in a fixed position when the static sealing assembly moves axially.

[0013] The beneficial effects of this invention are as follows: This intermediate reactor for hydrogen fluoride production integrates multiple functions such as gas guiding, dispersing, material pushing, sealing, expansion and contraction compensation, centralized lubrication, and rapid maintenance and exit. The large V-shaped gas guiding and pushing box and the pushing screw effectively solve the problem of material agglomeration, improving the reaction rate; the closely arranged discharge port and gas guiding port ensure smooth gas guiding and prevent gas leakage and corrosion; the dynamic and static ring mechanical seals combined with bellows expansion joints achieve reliable sealing and thermal compensation; the electric lubrication system and self-lubricating bushings ensure the long-term stable operation of key friction pairs; and the trolley design enables rapid maintenance, significantly improving the overall equipment uptime and production continuity. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an intermediate reactor for hydrogen fluoride production according to a specific embodiment of the present invention; Figure 2 for Figure 1 AA-direction cross-section diagram; Figure 3 for Figure 1 BB-direction cross-section diagram; Figure 4 for Figure 2 CC-direction cross-section; Figure 5 for Figure 1 Enlarged view of part A; Figure 6 for Figure 3 Enlarged view of part B; Figure 7 for Figure 1 Enlarged view of part C.

[0015] Label Explanation: 1. Pre-reactor; 11. Discharge port; 12. Fluorite powder addition port; 2. Air guide and pusher box; 21. Air guide port; 211. Pipe wall edge; 22. First end cap; 221. Feed inlet; 222. Second end cap; 23. Main body; 231. Arc segment; 232. Inner wall; 233. Base plate; 24. Support rib; 25. Hastelloy plate circular cross-section cylinder; 251. Cavity three; 26. Carbon steel circular cross-section cylinder; 261. Cavity two; 27. First support pipe; 271. Cavity four; 28. Sleeve; 29. ​​Expansion joint flange; 3. Feeding screw; 31. Screw shaft; 311. Guide cone; 312. Main shaft tube; 3121. Circular hole; 32. First bearing assembly; 321. Self-aligning roller bearing; 33. Bushing; 331. Inner sliding sleeve; 332. Outer sliding sleeve; 3321. Annular groove; 3322. Grease distribution hole; 3323. Rotating contact surface; 334. Lubricating graphite; 34. Shaft hole dynamic seal structure; 35. Second support tube; 36. Fan-shaped blade; 37. First coupling; 38. Second bearing assembly; 381. Intermediate shaft; 39. Second coupling; 310. Gear motor; 4. Drive assembly; 41. Cylinder assembly; 42. Spring assembly; 43. Static sealing assembly; 431. Sealing seat; 432. PTFE dust ring; 433. Static sealing ring; 4331. Grease reservoir; 44. PTFE bellows expansion joint; 441. Telescopic space; 45. Support roller; 46. Grease collection tank; 5. Electric lubrication system; 51. Extension connector; 52. Lubrication pipeline; 521. Connector 1; 522. Connector 2; 6. Pushing trolley; 61. Saddle; 62. Mounting base; 63. Fixing device; 7. Rotary reactor; 71. Furnace head end cover; 72. Dynamic sealing ring; 73. Rotary mechanical seal on the end face of dynamic and static rings. Detailed Implementation

[0016] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0017] Please refer to Figures 1 to 7 An intermediate reactor for hydrogen fluoride production, located between a pre-reactor and a rotary reactor 7, includes: The air-guided and pusher box 2 has a large V-shaped cross-section of the main body 23, and the lower part is a material trough composed of small-diameter arc segments 231. An air-guided port 21 is provided on the top of the air-guided and pusher box 2. The feeding screw 3 is concentrically set within the arc segment 231 to disperse and push the material into the rotary reactor 7; The trolley is used to carry the gas guide and pusher box 2 and the pusher screw 3, so that the entire intermediate reactor can move and exit independently. The static sealing component 43 is fitted onto the part of the gas guide and pusher box 2 that extends into the rotary reactor 7, and its end is provided with a static sealing ring 433. The dynamic sealing ring 72 is installed on the rotating furnace head end cover 71 and is tightly attached to the static sealing ring 433 to form a rotating mechanical seal 73 on the end face of the dynamic and static rings; Drive assembly 4, which includes cylinder assembly 41 and spring assembly 42, is distributed circumferentially along the air guide and push box 2 and is used to press the static sealing assembly 43. Expansion joint flange 29 is welded to the air guide and pusher box 2; The polytetrafluoroethylene corrugated expansion joint 44 is sleeved on the outside of the gas guide and pusher box 2. One end of it is connected to the gas guide and pusher box 2, and the other end is connected to the static sealing assembly 43, which is used to compensate for the axial expansion and contraction of the rotary reactor 7.

[0018] In the above embodiments, firstly, the main body 23 of the gas guide and pusher box 2 adopts a material trough with a large V-shaped cross section and a small-diameter arc segment 231 at the bottom. This structure is conducive to the material gathering and effective grabbing by the pusher screw 3; the upper gas guide port 21 is used to quickly discharge the generated HF gas. The pusher screw 3 is concentrically arranged within the arc segment 231, which can break up the lumps of material generated in the pre-reactor 1 and force them into the rotary reactor 7, so that the material can fully absorb heat in the furnace and significantly improve the reaction rate of calcium fluoride. The entire intermediate reactor is integrated and installed on the trolley, which can be moved and withdrawn independently during maintenance, providing ample space for disassembling the head end cover of the rotary reactor 7 and maintaining the internal parts of the furnace, greatly shortening downtime and improving equipment uptime. The furnace head seal uses a static sealing ring 433 that is tightly fitted with a dynamic sealing ring 72 installed on the rotary furnace head end cover 71 to form a rotary mechanical seal 73 of the dynamic and static ring end faces. It is pressed circumferentially by a cylinder assembly 41 and a spring assembly 42 to ensure the reliability of the seal. The polytetrafluoroethylene bellows expansion joint 44 is sleeved on the outside of the gas guide and pusher box 2. One end is connected to the gas guide and pusher box 2, and the other end is connected to the static sealing assembly 43. It is used to compensate for the axial expansion and contraction of the rotary reactor 7 caused by thermal expansion and contraction, avoid sealing surface failure, and ensure long-term stable operation.

[0019] As an optional implementation, the pre-reactor 1 is connected to the inlet 221 on the upper part of the first end cover 22 of the gas guide and pusher box 2 and is supported by an independent trolley. The outlet 11 of the pre-reactor 1 is set close to the gas guide 21, and the end of the outlet 11 does not exceed the pipe wall edge 211 of the gas guide 21.

[0020] In the above embodiments, the pre-reactor 1 is supported by an independent trolley and can be moved and withdrawn independently, further improving maintenance flexibility. The discharge port 11 of the pre-reactor 1 is close to the gas inlet 21 and does not exceed the edge 211 of the pipe wall, so that the HF gas generated can enter the gas inlet 21 directly without obstruction. The gas flow path is short and the resistance is low, which can quickly and smoothly enter the scrubbing tower, effectively preventing acidic gas from leaking towards the fluorite powder addition port 12, avoiding equipment corrosion and environmental pollution.

[0021] As an optional implementation, the main body 23 is welded from an explosive composite plate, with its inner wall 232 being a C-276 Hastelloy plate and its base plate 233 being a Q245R steel plate; the part of the gas guide and pusher box 2 that extends into the rotary reactor 7 is covered with a Hastelloy plate to form a circular cross-section cylinder, while the part located outside the rotary reactor 7 is a circular cross-section cylinder formed by carbon steel plates.

[0022] In the above embodiments, the main body 23 adopts an explosive composite plate, and the inner wall 232 is made of C-276 Hastelloy plate to ensure corrosion resistance at the contact surface with corrosive materials and acidic gases. The base plate 233 is made of Q245R carbon steel plate, which provides sufficient structural strength and significantly reduces the overall manufacturing cost. The part extending into the rotary reactor 7 is further covered with Hastelloy plate to form a circular cross-section cylinder to withstand the high-temperature and highly corrosive environment inside the furnace; the part located outside the reactor adopts a circular cross-section cylinder formed by carbon steel plates, which reasonably controls costs in areas that do not come into contact with highly corrosive media. This composite structure with different regions and materials not only meets the requirements for corrosion resistance but also optimizes the equipment cost.

[0023] As an optional implementation, a saddle 61 is provided at the lower part of the carbon steel circular cross-section of the gas guide and pusher box 2 body 23. The saddle 61 is installed on the pusher trolley 6. A pusher screw 3 is arranged concentrically with the small arc cross-section. The screw shaft 31 passes through the second end cover 222 installed at the lower part of the end cover of the gas guide and pusher box 2 and is supported by the self-aligning roller bearing 321 in the first bearing assembly 32. The other end is supported by the inner sliding sleeve 331 and the outer sliding sleeve 332. The inner end of the screw shaft 31 in the reactor has a guide cone 311. The inner sliding sleeve 331 and the outer sliding sleeve 332 are installed on the sleeve 28 welded in the middle of four X-shaped Hastelloy first support tubes 27.

[0024] In the above embodiments, a support method is adopted with a self-aligning roller bearing 321 at one end and an inner and outer sliding sleeve 332 at the other end. When the sliding sleeve 33 wears and causes the spiral shaft 31 to sag, the self-aligning roller bearing 321 can automatically adjust its angle to prevent the spiral shaft 31 from breaking due to becoming a cantilever beam, thus improving operational reliability. The X-shaped first support tube 27 has uniform stress distribution, good rigidity, and is made of Hastelloy alloy for corrosion resistance, ensuring long-term stable support. The end guide cone 311 facilitates the smooth entry of materials into the reactor and prevents accumulation.

[0025] It should be noted that the pusher screw 3 shaft is connected to the intermediate shaft 381 in the second bearing assembly 38 via the first coupling 37. The intermediate shaft 381 is connected to the geared motor 310 via the second coupling 39 and is driven to rotate by the geared motor 310. The geared motor 310, the second bearing assembly 38, and the first bearing assembly 32 are rigidly mounted on the pusher trolley 6 via the mounting base 62, ensuring the pushing capacity of the pusher screw 3 and preventing the pusher screw 3 shaft from moving due to axial thrust reaction. The pusher trolley 6 can carry the entire intermediate reactor and move it independently to facilitate the disassembly of the rotary reactor 7 head end cover and the inspection and maintenance of the reactor internals.

[0026] As an optional implementation, the portion of the spiral shaft 31 located inside the air guide and pusher box 2 is a Hastelloy seamless main shaft tube 312. A round hole 3121 is drilled on the main shaft tube 312 for inserting and welding a Hastelloy second support tube 35. Hastelloy fan-shaped blades 36 are welded on the second support tube 35.

[0027] In the above implementation methods, refer to Figure 5 It should be noted that the reference is... Figure 5 A dynamic and static seal P is formed between the screw shaft 31 and the second end cover 222 of the pusher using a dynamic sealing structure 34 (CN120172004A) for the end shaft hole of a single-tube screw conveyor. The portion of the screw shaft 31 located inside the air guide and pusher box 2 is made of Hastelloy seamless main shaft tube 312, ensuring the corrosion resistance of the main shaft in a highly corrosive environment. A circular hole 3121 is drilled on the main shaft, through which a welded Hastelloy second support tube 35 passes. Hastelloy fan-shaped blades 36 are then welded onto the second support tube 35, with the blades evenly distributed around the outer periphery of the main shaft tube 312 at a certain helical angle. This structure avoids stress concentration and welding deformation that may occur when the blades are directly welded to the main shaft, and also enhances the robustness of the connection between the blades and the main shaft through the second support tube 35. The entire structure is made of Hastelloy, ensuring long-term use without corrosion or failure in high-temperature and corrosive materials, while providing powerful material pushing and agglomeration breaking capabilities.

[0028] As an optional implementation, the intermediate reactor for hydrogen fluoride production also includes a lubrication pipeline 52 of the electric lubrication system 5, which sequentially passes through the end cap of the gas guide and pusher box 2, the cavity 261 between the carbon steel circular cross-section cylinder 26 and the main body 23 of the large V-shaped gas guide and pusher box 2, the support rib 24, the cavity 251 between the Hastelloy plate circular cross-section cylinder 25 and the main body 23 of the large V-shaped gas guide and pusher box 2, and the cavity 271 in the first Hastelloy support pipe 27, and finally connects to the connector 522 on the sleeve 28 to inject grease into the annular groove 3321 and the grease distribution hole 3322 of the outer sliding sleeve 332.

[0029] In the above implementation, the electric lubrication system 5 is equipped with two lubrication pipes 52 connected to the connector 521 on the first end cover 22 of the air guide and pusher box 2. The lubrication pipes 52 pass through the first end cover 22 of the air guide and pusher box 2, enter the cavity 261 between the circular cross-section cylinder of the carbon steel surrounding plate and the large V-shaped air guide and pusher box 2 body 23, then pass through the support rib 24, enter the cavity 251 between the circular cross-section cylinder of the Hastelloy plate 25 and the large V-shaped air guide and pusher box 2 body 23, and then pass through the air guide and pusher box 2 body 23 of the explosion composite plate into the cavity 271 inside the two Hastelloy first support tubes 27. (Refer to...) Figure 6 and Figure 7 Connected to the connector 522 installed through the sleeve 28, high-temperature grease is injected into the annular groove 3321 and grease distribution hole 3322 on the outer lubrication sleeve 33, lubricating the rotating contact surfaces 3323 of the inner sliding sleeve 331 and the outer sliding sleeve 332. The electric lubrication system 5 intermittently adds high-temperature grease with a dropping point higher than 280°C, intermittently lubricating the rotating mechanical seal 73 and the rotating contact surfaces 3323 on the dynamic and static ring end faces. This prevents liquefaction or vaporization due to high temperature, ensuring lubrication effect and saving the amount of high-temperature grease used. The lubrication pipelines 52 are all laid out in the cavity and will not be corroded by the highly corrosive gases in the rotary reactor 7. The inner sliding sleeve 331 and the outer sliding sleeve 332 are also embedded with lubricating graphite 334, forming a dual lubrication effect.

[0030] As an optional implementation, the PTFE bellows expansion joint 44 is sleeved on the outside of the Hastelloy plate circular cross-section cylinder 25 of the gas guide and pusher box 2. One end of the expansion joint is locked on the expansion joint flange 29, and the other end is locked on the static sealing assembly 43. The static sealing assembly 43 consists of a sealing seat 431 and a static sealing ring 433 clamping a PTFE dustproof ring 432. Its lower part is supported by a support roller 45. The PTFE dustproof ring 432 is sleeved on the outside of the Hastelloy plate circular cross-section cylinder 25 and slides with it.

[0031] In the above embodiments, a PTFE dust barrier ring 432 is sandwiched between the sealing seat 431 and the static sealing ring 433, and the dust barrier ring is tightly fitted around the circular cross-section cylinder 25 of the Hastelloy plate. When the rotary reactor 7 undergoes axial expansion and contraction, the static sealing assembly 43 slides along the cylinder, and the PTFE dust barrier ring 432 also slides accordingly, which can effectively prevent dust from entering the expansion space 441 between the bellows expansion joint and the cylinder, prevent blockage, and ensure that the bellows expansion joint can reliably perform its axial compensation function for a long time. In addition, the static sealing ring 433 is provided with a grease reservoir 4331, which is connected to the electric lubrication system 5 by an extension joint 51 passing through the sealing seat 431, and high-temperature grease is added periodically.

[0032] As an optional implementation, the rear of the pusher trolley is provided with a detachable fixing device 63 for keeping the position of the entire intermediate reactor fixed when the static sealing assembly 43 moves axially.

[0033] In the above embodiments, a detachable fixing device 63 is provided at the rear of the trolley. During normal production, the trolley position is locked to ensure the stability of the connection pipeline between the intermediate reactor, the pre-reactor 1, and the washing tower. During maintenance, the fixing device 63 can be removed to allow the trolley to be withdrawn as a whole. The grease receiving tank 46 moves synchronously with the static sealing assembly 43 to receive the total loss high-temperature lubricating grease dripping between the mechanical seals on the end faces of the dynamic and static rings, maintaining the cleanliness of the working environment.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An intermediate reactor for hydrogen fluoride production, disposed between a pre-reactor and a rotary reactor, characterized in that, include: The air-guided material pusher box has a large V-shaped cross-section, with a material trough composed of small-diameter arc segments at the bottom and an air vent at the top. The feeding screw, concentrically positioned within the arc segment, is used to break up the material and push it into the rotary reactor. The trolley is used to carry the gas guide and feed box and the feed screw, so that the entire intermediate reactor can be moved and withdrawn independently. A static sealing assembly is fitted onto the part of the gas guide and pusher box that extends into the rotary reactor, and its end is provided with a static sealing ring. The dynamic sealing ring is installed on the rotating furnace head end cover and is tightly fitted with the static sealing ring to form a rotating mechanical seal on the end faces of the dynamic and static rings; The drive assembly, which includes a cylinder assembly and a spring assembly, is distributed circumferentially along the air guide and push box and is used to press the static sealing assembly. The expansion joint flange is welded to the air guide and pusher box; A polytetrafluoroethylene corrugated expansion joint is fitted outside the gas guide and pusher box. One end of the expansion joint is connected to the gas guide and pusher box, and the other end is connected to the static sealing assembly. It is used to compensate for the axial expansion and contraction of the rotary reactor.

2. The intermediate reactor for hydrogen fluoride production according to claim 1, characterized in that, The pre-reactor is connected to the feed port on the upper part of the first end cover of the gas guide and feed box, and is supported by an independent trolley. The discharge port of the pre-reactor is set close to the gas guide port, and the end of the discharge port does not exceed the edge of the pipe wall of the gas guide port.

3. The intermediate reactor for hydrogen fluoride production according to claim 1, characterized in that, The main body is welded from explosive composite plates, with its inner wall made of C-276 Hastelloy plate and the base plate made of Q245R steel plate. The part of the gas guide and pusher box that extends into the rotary reactor is covered with Hastelloy plate to form a circular cross-section cylinder, while the part located outside the rotary reactor is a circular cross-section cylinder formed by carbon steel plates.

4. The intermediate reactor for hydrogen fluoride production according to claim 1, characterized in that, The lower part of the carbon steel circular cross-section of the gas guide and pusher box body is supported by a saddle. The saddle is mounted on the pusher trolley. A pusher screw is concentrically arranged with the small arc cross-section. The screw shaft passes through the second end cover installed under the end cover of the gas guide and pusher box and is supported by the self-aligning roller bearing in the first bearing assembly. The other end is supported by the inner sliding sleeve and the outer sliding sleeve. The inner end of the screw shaft in the reactor has a guide cone. The inner sliding sleeve and the outer sliding sleeve are mounted on a sleeve welded in the middle of four X-shaped Hastelloy alloy first support tubes.

5. The intermediate reactor for hydrogen fluoride production according to claim 4, characterized in that, The portion of the spiral shaft located inside the air guide and material pusher box is a seamless Hastelloy main shaft tube. A round hole is drilled on the main shaft tube for inserting and welding a second Hastelloy support tube. Hastelloy fan-shaped blades are welded onto the second support tube.

6. The intermediate reactor for hydrogen fluoride production according to claim 1, characterized in that, The intermediate reactor for hydrogen fluoride production also includes a lubrication pipeline of an electric lubrication system that passes sequentially through the end cover of the gas guide and pusher box, the cavity two between the carbon steel circular cross-section cylinder and the large V-shaped gas guide and pusher box body, the support rib, the cavity three between the Hastelloy plate circular cross-section cylinder and the large V-shaped gas guide and pusher box body, and the cavity four inside the Hastelloy first support tube, and finally connects to the connector two on the sleeve to inject grease into the annular groove and grease distribution hole of the outer sliding sleeve.

7. The intermediate reactor for hydrogen fluoride production according to claim 1, characterized in that, The PTFE bellows expansion joint is fitted onto the outside of the Hastelloy plate circular cross-section cylinder of the gas guide and pusher box. One end of the expansion joint is locked onto the expansion joint flange, and the other end is locked onto the static sealing assembly. The static sealing assembly consists of a sealing seat and a static sealing ring holding a PTFE dust baffle ring. Its lower part is supported by support rollers. The PTFE dust baffle ring is fitted onto the Hastelloy plate circular cross-section cylinder and slides with it.

8. The intermediate reactor for hydrogen fluoride production according to claim 1, characterized in that, The rear of the pusher trolley is equipped with a detachable fixing device to keep the entire intermediate reactor in a fixed position when the static sealing assembly moves axially.

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