Reaction equipment for preparing phosphorus oxyfluoride

Abstract

The invention relates to the technical field of chemical equipment, in particular to reaction equipment for preparing phosphorus oxyfluoride, which comprises: a main body internally provided with a gas inlet cavity, a reaction cavity and a separation cavity in sequence from bottom to top; the gas-solid distribution mechanism is arranged in the gas inlet cavity and comprises a gas flow distribution assembly, a distribution driving assembly and a solid phase distribution pore plate, a gas flow channel is formed in the gas flow distribution assembly, and the size of the gas flow channel periodically changes along with bidirectional rotation of the gas flow distribution assembly; the guide mechanism comprises a rectification grid plate, a guide plate group and a guide driving assembly, and the guide driving assembly drives the guide plate group to rotate; the heat exchange mechanism is arranged around the outer edge of the main body corresponding to the gas inlet cavity, the reaction cavity and the separation cavity; and the separation mechanism is arranged in the separation cavity and is used for carrying out solid-gas separation on the gas flow in the separation cavity. According to the method, phosphorus oxyfluoride can be efficiently obtained at low cost through continuous solid-gas reaction, and the method has good industrial value.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and in particular to a reaction apparatus for the preparation of phosphorus oxyfluoride. Background Technology

[0002] Currently, phosphorus oxyfluoride (POF3) is a colorless gas with a pungent odor under normal conditions, and it emits a faint fumes in the air. The preparation of phosphorus oxyfluoride (POF3) mainly involves the reaction of CaF2 with anhydrous sulfurous acid to first generate CaF(SO3F), and then reacting it with H3PO4 to generate the intermediate product POF3. However, due to the complexity of the CaF2 preparation process and its solid form, continuous production is difficult, resulting in high overall production costs. Moreover, the generated CaSO4 causes serious soil pollution, necessitating appropriate treatment.

[0003] While a technical solution for preparing phosphorus oxyfluoride by reacting polyphosphoric acid with anhydrous hydrogen fluoride has emerged, this solution is entirely a gas-liquid reaction and cannot be applied to solid reactants. Furthermore, as phosphorus oxyfluoride is an important industrial raw material, overly restrictive preparation routes would hinder large-scale industrial production and impede the healthy development of the industrial system.

[0004] Phosphorus pentoxide (actual structure is P4O) 10 P4O reacts with anhydrous hydrogen fluoride under appropriate conditions to gradually fluorinate and form POF3. The overall reaction can be represented as: P4O 10 +12HF → 4POF3 + 6H2O. However, this overall formula is not accurate under anhydrous conditions because the generated water will react with excess HF to form hydrofluoric acid, and may even further react with P2O5 or intermediate products. In more rigorous anhydrous systems, the reaction is usually controlled to have excess HF and to avoid water accumulation; the actual process involves multiple fluorination steps, such as P2O5 or P4O. 10 First, it reacts with HF to form intermediates such as (POF2)2O (difluorophosphoric anhydride) or HPO2F2 (difluorophosphoric acid). Under excess anhydrous HF and appropriate heating, it further undergoes fluorination and dehydration to form POF3. The simplified net reaction (under strictly anhydrous, excess HF conditions) is: P2O5 + 6HF → 2POF3 + 3H2O. However, due to the presence of a large amount of anhydrous HF in the system, the generated water will be "bound" by HF to form H3O. + ·F - or H2F + Species such as [unspecified species] inhibit the reverse reaction and drive the reaction to the right.

[0005] However, phosphorus pentoxide is a solid under normal conditions, making continuous production difficult with existing reaction vessels and other equipment. While fluidized bed reactors and similar equipment can be used, the generation of water and side reactions can easily cause phosphorus pentoxide to clump together, affecting normal operation. Furthermore, fluidized bed reactors cannot address the temperature control issues during the reaction process. Therefore, it is necessary to research a reaction apparatus for the preparation of phosphorus oxyfluoride to achieve a uniform reaction between phosphorus pentoxide and anhydrous hydrogen fluoride, thereby obtaining phosphorus oxyfluoride at low cost and high efficiency. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a reaction device for the preparation of phosphorus oxyfluoride, thereby solving the problem of the difficulty in continuous production of the reaction path for the preparation of phosphorus oxyfluoride from phosphorus pentoxide.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a reaction apparatus for the preparation of phosphorus oxyfluoride, comprising: The main body has, from bottom to top, an air inlet chamber, a reaction chamber, and a separation chamber. An air inlet pipe is provided at the bottom of the air inlet chamber, and a solid feed pipe is provided in the middle of the reaction chamber. The gas-solid distribution mechanism is installed inside the air intake chamber and includes an airflow distribution component, a distribution drive component, and a solid phase distribution orifice plate. The solid phase distribution orifice plate is installed at the junction of the air intake chamber and the reaction chamber. The airflow distribution component is installed below the solid phase distribution orifice plate. The distribution drive component is installed on the outside of the main body and the drive end of the distribution drive component is driven and connected to the bottom of the airflow distribution component, so that the airflow distribution component can rotate in both directions. The airflow distribution component has an airflow channel inside, and the size of the airflow channel changes periodically with the bidirectional rotation of the airflow distribution component. The guiding mechanism includes a rectifier grid, a guide plate assembly, and a guiding drive assembly. The rectifier grid is located at the junction of the reaction chamber and the separation chamber. The top of the guide plate assembly is embedded in the center of the rectifier grid. The guide plate assembly is distributed vertically and extends outward from the axis of the guide plate assembly. The driving end of the guiding drive assembly is connected to the top of the guide plate assembly from the top of the rectifier grid. The guiding drive assembly drives the guide plate assembly to rotate. The heat exchange mechanism is arranged around the outer edge of the main body, corresponding to the air inlet chamber, reaction chamber and separation chamber; The separation mechanism is located inside the separation chamber and performs solid-gas separation on the airflow inside the separation chamber.

[0008] In one embodiment, the airflow distribution assembly includes a first distribution plate and a second distribution plate. The first distribution plate has a first channel, the diameter of which gradually decreases to a minimum from the bottom to the middle of the first distribution plate, and then extends from the middle of the first distribution plate to the top of the first distribution plate. The second distribution plate has a second channel corresponding to the first channel, the diameter of which first decreases and then increases from the bottom to the top of the second distribution plate.

[0009] In one embodiment, air passages are arranged in an array on the solid phase distribution plate, and the diameter of the air passages is smaller than the minimum diameter of the second channel; the diameter of the air passages is 1 to 5 mm.

[0010] In one embodiment, the distributed drive assembly includes a distributed motor, a distributed coupler, a distributed connecting rod, and a bidirectional gear set. The distributed motor is located on the outside of the main body. The driving end of the distributed motor is connected to one end of the distributed coupler, and the other end of the distributed coupler is connected to the distributed connecting rod. The distributed coupler is a magnetic coupler. The side wall of the main body is located in the air gap of the distributed coupler. The other end of the distributed connecting rod is driven by the bidirectional gear set, which drives the first distributed plate and the second distributed plate to rotate in opposite directions.

[0011] In one embodiment, the bidirectional gear set includes a drive bevel gear, a first bevel gear, and a second bevel gear. The center of the drive bevel gear is connected to a distribution link. The first bevel gear and the second bevel gear are respectively meshed on the upper and lower sides of the drive bevel gear. The first bevel gear is connected to a first link, which is driven to a first distribution plate. The second bevel gear is connected to a second link, which passes through the axis of the first link and is driven to a second distribution plate.

[0012] In one embodiment, the guide plate assembly is provided with a medium flow channel, and the guide mechanism further includes a medium connection base and a medium connector. The center of the medium connection base is provided with a drive connection hole, and the medium connection base is provided with an inflow annular cavity and an outflow annular cavity around the drive connection hole. The medium connector is embedded in the medium connection base and connected to the top of the guide plate assembly. The two ends of the medium flow channel are connected to the inflow annular cavity and the outflow annular cavity through the medium connector. The guide drive assembly is driven to connect with the medium connector through the drive connection hole. The guide drive assembly drives the medium connector to rotate, thereby driving the guide plate assembly to rotate.

[0013] In one embodiment, the inflow annular cavity is located outside the outflow annular cavity, and the inflow annular cavity and the outflow annular cavity are respectively provided with an inflow annular port and an outflow annular port on the side near the medium connector. The two ends of the medium flow channel are connected to the inflow annular port and the outflow annular port.

[0014] In one embodiment, the guide drive assembly includes a guide motor, a guide coupler, a transmission link, and a guide gear set. The guide motor is located on the outside of the main body. The drive end of the guide motor is connected to one end of the guide coupler, and the other end of the guide drive coupler is connected to the transmission link. The guide coupler is a magnetic coupler. The side wall of the main body is located in the air gap of the guide coupler. The other end of the guide link is driven to the guide gear set. The guide gear set drives the medium connector to rotate, thereby driving the guide plate assembly to rotate.

[0015] In one embodiment, the heat exchange mechanism includes a heat exchange ring tube and a heat exchange shell, the heat exchange shell covers the main body, a heat exchange cavity is formed between the heat exchange shell and the main body, and the heat exchange ring tube is disposed in the heat exchange cavity.

[0016] In one embodiment, a buffer inlet pipe is provided on the heat exchange cavity.

[0017] The beneficial effects of this invention are as follows: Conventional fluidized bed towers use fixed airflow distributors and sintered perforated plates to guide airflow, causing the airflow to carry solid particles above the perforated plates and fluidize them. However, because the airflow distributor and sintered perforated plates are fixed structures, the generated airflow... This application employs a distributed drive component to drive the airflow distribution component in a bidirectional rotation, enabling periodic adjustment of the airflow channels within the airflow distribution component. This allows the area of ​​the airflow channels to shrink or enlarge, thereby changing the airflow velocity while maintaining a stable inlet velocity. This results in periodic changes in the airflow within the reaction chamber, transforming the gas entering the reaction chamber from a static jet into a dynamic airflow field characterized by pulsation, shearing, and multi-directional disturbance. This generates bed-bottom shear force, preventing particle agglomeration. Simultaneously, the dynamic airflow field fluidizes the reaction solids, forming numerous tiny, uniformly sized bubbles. This increases the gas-solid specific surface area, enhances the contact efficiency between the reactant gas and the solid, and ensures the uniformity of the reaction.

[0018] Meanwhile, although the dynamic flow field can break up some of the bonded solids, the vigorous reaction of the reactants during the reaction process may lead to localized overheating in the upper part of the reaction chamber, resulting in a large number of side reactions. Therefore, this invention employs a guiding mechanism, which drives the guide plate assembly to rotate as a whole, applying tangential force to the airflow in the reaction chamber. This causes the airflow to become a spiral upward flow, further breaking up the bonded solids, destroying the by-product layer on the surface, exposing the fresh phosphorus pentoxide surface, and maintaining a loose and highly reactive state of the solids. Furthermore, the spiral upward airflow not only prolongs the residence time of the gas in the bed, ensuring reaction efficiency, but also guides the airflow in the middle to the side wall of the main body, thereby achieving sufficient heat exchange with the heat exchange mechanism and ensuring that the system temperature meets the requirements. In addition, solid particles fall into the reaction chamber after impacting the wall of the guide plate assembly, continuing material circulation and reducing the burden on subsequent separation.

[0019] Furthermore, a rectifier grid is installed on the outer edge of the guide plate assembly, which can rectify the spiral rising airflow that is about to enter the separation chamber, eliminate deflection and vortex, and make the rising airflow enter the separation mechanism tangentially, reduce the load on the separation mechanism, improve the separation effect, and prevent solid powder from being carried out of the reaction chamber.

[0020] Other features and beneficial effects of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects of the invention and other beneficial effects may be realized and obtained by means of the structures and / or components pointed out in the description and claims. Attached Figure Description

[0021] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 for Figure 1 Top view; Figure 3 for Figure 2 Cross-sectional view at point AA; Figure 4 for Figure 3 A magnified view of a section at point B in the middle; Figure 5 for Figure 3 A magnified view of a section at point C; Figure 6 This is an exploded view of an airflow distribution component according to an embodiment of the present invention; Figure 7 This is a three-dimensional schematic diagram of the guide mechanism in one embodiment of the present invention; Figure 8 This is a three-dimensional schematic diagram of a medium connection base according to an embodiment of the present invention.

[0022] Label Explanation: 1. Main body; 11. Inlet chamber; 12. Reaction chamber; 13. Separation chamber; 14. Inlet pipe; 15. Solid feed pipe; 2. Gas-solid distribution mechanism; 21. Airflow distribution assembly; 211. First distribution plate; 2111. First channel; 212. Second distribution plate; 2121. Second channel; 22. Distribution drive assembly; 221. Distribution motor; 222. Distribution coupler; 223. Distribution connecting rod; 224. Bidirectional gear set; 2241. Drive bevel gear; 2242. First bevel gear; 2243. Second bevel gear; 2244. First connecting rod; 2245. Second connecting rod 23. Rod; 231. Solid phase distribution orifice plate; 3. Airflow orifice; 3. Guiding mechanism; 31. Rectifying grid plate; 32. Guide plate assembly; 321. Medium flow channel; 33. Guiding drive assembly; 331. Guiding motor; 332. Guiding coupler; 333. Transmission connecting rod; 334. Guiding gear set; 34. Medium connection base; 341. Inflow annular cavity; 342. Outflow annular cavity; 343. Outflow annular port; 344. Inflow annular port; 35. Medium connector; 4. Heat exchange mechanism; 41. Heat exchange annular tube; 42. Heat exchange shell; 43. Heat exchange cavity; 44. Buffer input pipe; 5. Separation mechanism. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. The technical features designed in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. 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.

[0024] In the description of this invention, it should be noted that all terms used in this invention (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and should not be construed as limiting the invention; it should be further understood that the terms used in this invention should be understood to have the same meaning as those in the context of this specification and in the relevant field, and should not be understood in an idealized or overly formal sense, except as expressly defined in this invention.

[0025] 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.

[0026] Please refer to Figures 1 to 8 A reaction apparatus for the preparation of phosphorus oxyfluoride, comprising: The main body 1 has an air inlet chamber 11, a reaction chamber 12 and a separation chamber 13 arranged from bottom to top inside. An air inlet pipe 14 is provided at the bottom of the air inlet chamber 11 and a solid feed pipe 15 is provided in the middle of the reaction chamber 12. The gas-solid distribution mechanism 2 is disposed in the air intake cavity 11 and includes an airflow distribution component 21, a distribution drive component 22, and a solid phase distribution perforated plate 23. The solid phase distribution perforated plate 23 is disposed at the junction of the air intake cavity 11 and the reaction cavity 12. The airflow distribution component 21 is disposed below the solid phase distribution perforated plate 23. The distribution drive component 22 is disposed outside the main body 1 and the drive end of the distribution drive component 22 is driven and connected to the airflow distribution component 21 from the bottom of the airflow distribution component 21, so that the airflow distribution component 21 can rotate in both directions. The airflow distribution component 21 is provided with an airflow channel, and the size of the airflow channel changes periodically with the bidirectional rotation of the airflow distribution component 21. The guiding mechanism 3 includes a rectifier grid 31, a guide plate assembly 32, and a guide drive assembly 33. The rectifier grid 31 is disposed at the junction of the reaction chamber 12 and the separation chamber 13. The top of the guide plate assembly 32 is embedded in the center of the rectifier grid 31. The guide plate assembly 32 is distributed vertically and extends outward from the axis of the guide plate assembly 32. The driving end of the guide drive assembly 33 is driven to connect the top of the rectifier grid 31 and the top of the guide plate assembly 32. The guide drive assembly 33 drives the guide plate assembly 32 to rotate. The heat exchange mechanism 4 is arranged around the outer edge of the main body 1, corresponding to the air inlet chamber 11, the reaction chamber 12 and the separation chamber 13; The separation mechanism 5 is installed inside the separation chamber 13 to perform solid-gas separation of the airflow inside the separation chamber 13.

[0027] Specifically, the separation mechanism 5 can be a cyclone separator. The cyclone separator has an outlet pipe at its center, which extends from the top of the main body 1. The cyclone separator has a slag discharge pipe at its bottom, which extends from the side wall of the main body 1.

[0028] Specifically, a conveying screw is provided in the solid feed pipe 15.

[0029] If only the orifice size is adjusted, it can only change the intensity of the airflow in the vertical direction, and the purging effect on the solids deposited on the surface of the solid distribution orifice plate 23 is not good. Therefore, in this embodiment, the airflow distribution component 21 includes a first distribution plate 211 and a second distribution plate 212. The first distribution plate 211 is provided with a first channel 2111. The diameter of the first channel 2111 gradually decreases to the minimum from the bottom to the middle of the first distribution plate 211, and then extends from the middle to the top of the first distribution plate 211. The second distribution plate 212 is provided with a second channel 2121 corresponding to the first channel 2111. The diameter of the second channel 2121 first decreases and then increases from the bottom to the top of the second distribution plate 212. The first channel 2111 has a structure that first contracts and then flows straight through. The end aperture of the first channel 2111 is relatively small. This structure accelerates the incoming airflow, thereby enhancing the initial airflow, accelerating fluidization formation, and increasing the impact on the solid distribution plate 23, preventing blockage and ensuring the normal progress of the reaction. The second channel 2121 has a larger initial aperture and contracts at an angle. This design allows the airflow from the first channel 2111 to enter the second channel 2121 at an angle when the first and second distribution plates 211 and 212 rotate in opposite directions, forming a tangential airflow, enhancing the bed shear force, and further preventing particle agglomeration. Furthermore, the second channel 2121 has an overall Venturi structure, ensuring uniform airflow distribution at the outlet, thus guaranteeing overall fluidization without energy loss and avoiding local stratification or backmixing.

[0030] In this embodiment, airflow holes 231 are arrayed on the solid-phase distribution perforated plate 23. The diameter of the airflow holes 231 is smaller than the minimum diameter of the second channel 2121; the diameter of the airflow holes 231 is 1-5 mm. This allows the airflow in the second channel 2121 to correspond to multiple airflow holes 231, so that different airflows can be blown out from the airflow holes 231 at different positions when the airflow distribution assembly 21 rotates in both directions, ensuring the formation of a dynamic flow field. Furthermore, if the diameter of the airflow holes 231 is too small, such as <1 mm, the dynamic airflow cannot effectively carry phosphorus pentoxide particles (density approximately 2.39 g / cm³). 3 If the diameter of the airflow orifice 231 is too large, such as >5mm, solid particles may leak into the air intake cavity 11 and block the airflow distribution component 21, resulting in interruption of fluidization.

[0031] Preferably, a slag discharge pipe is provided on the side wall above the solid phase distribution perforated plate 23 for periodically removing the adhesive particles deposited on the surface of the solid phase distribution perforated plate 23.

[0032] Since both the generated phosphorus oxyfluoride and the reactant gas anhydrous hydrogen fluoride are corrosive, to ensure the overall safety of the device and prevent corrosion damage to the wiring and motor structure of the distribution drive assembly 22, in this embodiment, the distribution drive assembly 22 includes a distribution motor 221, a distribution coupler 222, a distribution connecting rod 223, and a bidirectional gear set 224. The distribution motor 221 is located on the outside of the main body 1. The driving end of the distribution motor 221 is connected to one end of the distribution coupler 222, and the other end of the distribution coupler 222 is connected to the distribution connecting rod 223. The distribution coupler 222 is a magnetic coupler, and the side wall of the main body 1 is located in the air gap of the distribution coupler 222. The other end of the distribution connecting rod 223 is driven by the bidirectional gear set 224, which drives the first distribution plate 211 and the second distribution plate 212 to rotate in opposite directions. This arrangement allows the distribution drive assembly 22 to transmit power from the outside of the main body 1 to the airflow distribution assembly 21, avoiding direct contact between the distribution drive assembly 22 and the corrosive gas, effectively improving safety. Meanwhile, the use of magnetic couplers eliminates the need for the transmission structure to penetrate the side of the main body 1, greatly reducing sealing requirements, effectively lowering costs, and avoiding gas leakage problems.

[0033] Preferably, a protective housing is fitted onto the distribution coupler 222, the distribution connecting rod 223, and the bidirectional gear set 224. The protective housing extends from the side wall of the air intake chamber 11 into the air intake chamber 11. This arrangement can reduce the corrosion of the distribution coupler 222, the distribution connecting rod 223, and the bidirectional gear set 224 by anhydrous hydrogen fluoride gas, improve the stability of operation, and extend the service life of the equipment.

[0034] In this embodiment, the bidirectional gear set 224 includes a drive bevel gear 2241, a first bevel gear 2242, and a second bevel gear 2243. The center of the drive bevel gear 2241 is connected to the distribution connecting rod 223. The first bevel gear 2242 and the second bevel gear 2243 are respectively meshed on the upper and lower sides of the drive bevel gear 2241. The first bevel gear 2242 is connected to a first connecting rod 2244, which is drivenly connected to the first distribution plate 211. The second bevel gear 2243 is connected to a second connecting rod 2245, which passes through the axis of the first connecting rod 2244 and is drivenly connected to the second distribution plate 212.

[0035] Although this invention provides heat exchange mechanisms 4 corresponding to different chambers and guides the airflow and solid particles in the middle of the reaction chamber 12 through the side wall of the rotating guide body 1 via the guide mechanism 3, enabling sufficient heat exchange, insufficient heat exchange still exists for the airflow and particles inside the reaction chamber 12, leading to temperature instability. Furthermore, installing heat exchange tubes or similar structures inside the reaction chamber 12 would affect airflow, causing turbulence or vortices at the contact point between the airflow and the heat exchange tubes, resulting in particle adhesion or back-mixing. Therefore, the guide plate assembly 32 is provided with a medium flow channel 321. The guide mechanism 3 also includes a medium connection base 34 and a medium connector 35. The center of the medium connection base 34 is provided with a drive connection hole. The medium connection base 34 is provided with an inflow annular cavity 341 and an outflow annular cavity 342 surrounding the drive connection hole. The medium connector 35 is embedded in the medium connection base 34 and connected to the top of the guide plate assembly 32. The two ends of the medium flow channel 321 are connected to the inflow annular cavity 341 and the outflow annular cavity 342 through the medium connector 35. The guide drive assembly 33 is driven to connect to the medium connector 35 through the drive connection hole. The guide drive assembly 33 drives the medium connector 35 to rotate, thereby driving the guide plate assembly 32 to rotate. That is, the present invention provides a medium flow channel 321 in the guide plate assembly 32, so that the heat exchange medium exchanges heat with the airflow and solid particles through the guide plate assembly 32, effectively enhancing the heat exchange effect without affecting the internal airflow.

[0036] Specifically, the medium connector 35 can rotate relative to the medium connector base 34, allowing the heat exchange medium to flow along the medium flow channel 321 without affecting the rotation of the guide plate assembly 32.

[0037] In this embodiment, the inflow annular cavity 341 is located outside the outflow annular cavity 342. The inflow annular cavity 341 and the outflow annular cavity 342 are respectively provided with an inflow annular port 344 and an outflow annular port 343 on the side near the medium connector 35. Both ends of the medium flow channel 321 are connected to the inflow annular port 344 and the outflow annular port 343. Specifically, one end of the medium flow channel 321 starts from the top of the guide plate assembly 32, extends downwards in a serpentine pattern along the periphery of the guide plate assembly 32, and connects upwards at the bottom from the axis of the guide plate assembly 32 to the outflow annular cavity 342. This arrangement ensures that the flow direction of the heat exchange medium is opposite to the airflow direction, increasing the heat exchange efficiency per unit time and enhancing the heat exchange effect.

[0038] In this embodiment, the guide drive assembly 33 includes a guide motor 331, a guide coupler 332, a transmission link 333, and a guide gear set 334. The guide motor 331 is located on the outside of the main body 1. The drive end of the guide motor 331 is connected to one end of the guide coupler 332, and the other end of the guide coupler 332 is connected to the transmission link 333. The guide coupler 332 is a magnetic coupler. The side wall of the main body 1 is located in the air gap of the guide coupler 332. The other end of the guide link is driven by the guide gear set 334. The guide gear set 334 drives the medium connector 35 to rotate, thereby driving the guide plate assembly 32 to rotate. Specifically, the guide gear set 334 can be a meshing bevel gear or helical gear. Those skilled in the art can adjust it as needed, and no specific limitation is made.

[0039] Preferably, the heat exchange mechanism 4 includes a heat exchange ring tube 41 and a heat exchange shell 42. The heat exchange shell 42 covers the main body 1, and a heat exchange cavity 43 is formed between the heat exchange shell 42 and the main body 1. The heat exchange ring tube 41 is disposed in the heat exchange cavity 43.

[0040] In this embodiment, a buffer solution inlet pipe 44 is provided on the heat exchange cavity 43. When a leak occurs on the side wall of the main body 1, the buffer solution can be sprayed into the heat exchange cavity 43 through the buffer solution inlet pipe 44 to absorb the leaked phosphorus oxyfluoride or anhydrous hydrogen fluoride and other gases, thereby improving the safety of the equipment.

[0041] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of the present invention can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or the background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0042] Although this document frequently uses terms such as "body" and "intake chamber," the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any kind of additional limitation would contradict the spirit of the invention. The terms "first," "second," etc. (if present) in the description and claims of the embodiments of the invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reaction apparatus for the preparation of phosphorus oxyfluoride, characterized in that, The utility model relates to a kind of gas-solid separation reactor, including: Main body (1), inside sequentially has intake cavity (11), reaction cavity (12) and separation cavity (13) from bottom to top, the bottom of the intake cavity (11) is provided with intake pipe (14), the middle part of the reaction cavity (12) is equipped with solid feeding pipe (15); Gas-solid distribution mechanism (2) is arranged in the intake cavity (11), including airflow distribution assembly (21), distribution drive assembly (22) and solid-phase distribution orifice plate (23), the solid-phase distribution orifice plate (23) is arranged at the junction of the intake cavity (11) and the reaction cavity (12), the airflow distribution assembly (21) is arranged below the solid-phase distribution orifice plate (23), the distribution drive assembly (22) is arranged outside the main body (1), and the driving end of the distribution drive assembly (22) is drivenly connected with the bottom of the airflow distribution assembly (21) and the airflow distribution assembly (21), so that the airflow distribution assembly (21) rotates bidirectionally, airflow passage is provided in the airflow distribution assembly (21), and the size of the airflow passage periodically changes with the bidirectional rotation of the airflow distribution assembly (21); Guiding mechanism (3), including rectifier grid (31), guide plate group (32) and guide drive assembly (33), the rectifier grid (31) is arranged at the junction of the reaction cavity (12) and the separation cavity (13), the top of the guide plate group (32) is embedded in the center of the rectifier grid (31), the guide plate group (32) is distributed along the vertical direction and extends to the periphery from the axis of the guide plate group (32), the driving end of the guide drive assembly (33) is drivingly connected with the top of the guide plate group (32) from above the rectifier grid (31), and the guide drive assembly (33) drives the guide plate group (32) to rotate; Heat exchange mechanism (4) is arranged around the outer edge of the main body (1) corresponding to the intake cavity (11), the reaction cavity (12) and the separation cavity (13); Separation mechanism (5) is arranged in the separation cavity (13), and gas-solid separation is carried out on the airflow in the separation cavity (13).

2. The reaction apparatus for producing phosphorus oxyfluoride according to claim 1, characterized by: The airflow distribution assembly (21) includes first distribution plate (211) and second distribution plate (212), the first distribution plate (211) is provided with first channel (2111), the diameter of the first channel (2111) gradually shrinks to the minimum from the bottom to the middle of the first distribution plate (211), and then extends to the top of the first distribution plate (211) from the middle of the first distribution plate (211);Second distribution plate (212) is provided with second channel (2121) corresponding to the first channel (2111), and the diameter of the second channel (2121) is first reduced and then increased from the bottom to the top of the second distribution plate (212).

3. The reaction apparatus for producing phosphorus oxyfluoride according to claim 2, characterized by: The solid-phase distribution orifice plate (23) is arranged with airflow through holes (231) in an array, the airflow through holes (231) have a diameter smaller than the minimum diameter of the second channel (2121); the diameter of the airflow through holes (231) is 1-5 mm.

4. The reaction apparatus for producing phosphorus oxyfluoride according to claim 2, characterized by: The distribution driving assembly (22) comprises a distribution motor (221), a distribution coupler (222), a distribution connecting rod (223) and a bidirectional gear set (224), the distribution motor (221) is arranged outside the main body (1), the driving end of the distribution motor (221) is connected with one end of the distribution coupler (222), the other end of the distribution coupler (222) is connected with the distribution connecting rod (223), the distribution coupler (222) is a magnetic coupler, the sidewall of the main body (1) is located in the air gap of the distribution coupler (222), the other end of the distribution connecting rod (223) is drivingly connected with the bidirectional gear set (224), the bidirectional gear set (224) drives the first distribution plate (211) and the second distribution plate (212) to rotate in opposite directions.

5. The phosphorus oxyfluoride production reaction apparatus according to claim 4, characterized by: The bidirectional gear set (224) comprises a driving bevel gear (2241), a first bevel gear (2242) and a second bevel gear (2243), the center of the driving bevel gear (2241) is connected with the distribution connecting rod (223), the first bevel gear (2242) and the second bevel gear (2243) are respectively engaged on the upper and lower sides of the driving bevel gear (2241), the first bevel gear (2242) is connected with a first connecting rod (2244), the first connecting rod (2244) is drivingly connected with the first distribution plate (211), the second bevel gear (2243) is connected with a second connecting rod (2245), the second connecting rod (2245) penetrates the shaft center of the first connecting rod (2244) and is drivingly connected with the second distribution plate (212).

6. The reaction apparatus for preparing phosphorus oxyfluoride according to claim 1, wherein: The guide plate set (32) is provided with a medium flow channel (321), the guide mechanism (3) further comprises a medium connecting base (34) and a medium connecting piece (35), the center of the medium connecting base (34) is provided with a driving connection hole, the medium connecting base (34) is provided with an inflow ring cavity (341) and an outflow ring cavity (342) around the driving connection hole, the medium connecting piece (35) is embedded in the medium connecting base (34) and connected with the top of the guide plate set (32), the two ends of the medium flow channel (321) are communicated with the inflow ring cavity (341) and the outflow ring cavity (342) through the medium connecting piece (35), the guide driving assembly (33) is drivingly connected with the medium connecting piece (35) through the driving connection hole, the guide driving assembly (33) drives the medium connecting piece (35) to rotate, thereby driving the guide plate set (32) to rotate.

7. The reaction apparatus for producing phosphorus oxyfluoride according to claim 6, characterized by: The inflow annular cavity (341) is arranged outside the outflow annular cavity (342), and the inflow annular cavity (341) and the outflow annular cavity (342) are correspondingly provided with an inflow annular opening (344) and an outflow annular opening (343) on the side close to the medium connector (35), and the two ends of the medium flow channel (321) are connected with the inflow annular opening (344) and the outflow annular opening (343).

8. The reaction apparatus for producing phosphorus oxyfluoride according to claim 6, characterized by: The guide driving assembly (33) comprises a guide motor (331), a guide coupler (332), a transmission connecting rod (333) and a guide gear set (334), the guide motor (331) is arranged outside the main body (1), the driving end of the guide motor (331) is connected with one end of the guide coupler (332), the other end of the guide coupler (332) is connected with the transmission connecting rod (333), the guide coupler (332) is a magnetic coupler, the side wall of the main body (1) is located in the air gap of the guide coupler (332), the other end of the guide connecting rod is drivingly connected with the guide gear set (334), the guide gear set (334) drives the medium connector (35) to rotate, and in turn drives the guide plate set (32) to rotate.

9. The reaction apparatus for preparing phosphorus oxyfluoride according to claim 1, wherein: The heat exchange mechanism (4) comprises a heat exchange ring pipe (41) and a heat exchange shell (42), the heat exchange shell (42) covers the main body (1), a heat exchange cavity (43) is formed between the heat exchange shell (42) and the main body (1), and the heat exchange ring pipe (41) is arranged in the heat exchange cavity (43).

10. The reaction apparatus for producing phosphorus oxyfluoride according to claim 9, characterized by: The heat exchange cavity (43) is provided with a buffer liquid input pipe (44).

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