Micro-channel reaction device and method for preparing anhydrous ammonium bifluoride

Abstract

The invention discloses a microchannel reaction device and method for preparing anhydrous ammonium hydrogen fluoride, and relates to the technical field of anhydrous ammonium hydrogen fluoride. Comprising a storage box, a plurality of bases are installed on the outer wall of the top of the storage box, and heating mechanisms are installed on the bases. Through the heating mechanism and the pressurizing mechanism, the temperature and the pressure in the reaction tube can be adjusted to achieve the effect of improving the reaction efficiency, through the arranged mixing mechanism, the ammonia gas and the hydrogen fluoride are fully mixed by utilizing air convection generated by rotation of opposite fan blades, so that the mixing efficiency of the ammonia gas and the hydrogen fluoride is enhanced; through cooperation of the heating mechanism, the pressurizing mechanism and the mixing mechanism, the reaction rate, the product yield and the purity can be further improved, anhydrous ammonium bifluoride obtained through the reaction can be pushed out of the reaction tube through the arranged material pushing mechanism, a worker can conveniently collect the reaction product, and the reaction efficiency is improved. The preparation efficiency of the anhydrous ammonium hydrogen fluoride is improved.

Description

Technical Field

[0001] The invention relates to the technical field of anhydrous ammonium bifluoride, in particular to a microchannel reaction device and a method for preparing anhydrous ammonium bifluoride. Background Art

[0002] Anhydrous ammonium bifluoride is an inorganic compound commonly used in the chemical industry and laboratories. Anhydrous ammonium bifluoride is an important chemical reagent widely used in chemical synthesis, electronics industry, materials science and other fields. Due to its irritation and corrosiveness, it is necessary to pay attention to safety protection when using it and ensure that it is operated in an appropriate environment.

[0003] When preparing anhydrous ammonium bifluoride, the reaction method of ammonia and hydrogen fluoride is often used. The reaction method of ammonia and hydrogen fluoride has the advantages of high efficiency, high purity, simple operation, mild conditions, strong controllability, relatively high safety, good economy and environmental friendliness when preparing anhydrous ammonium bifluoride.

[0004] When anhydrous ammonium bifluoride is prepared by a reaction method of ammonia and hydrogen fluoride, ammonia and hydrogen fluoride are often required to be put into a pipeline, and then the ammonia and hydrogen fluoride in the pipeline are fully mixed and reacted to obtain anhydrous ammonium bifluoride. During the reaction process, improving the efficiency of fully mixing ammonia and hydrogen fluoride has an important influence on improving the reaction rate, improving the product recovery rate and purity. The reaction device for preparing anhydrous ammonium bifluoride in the prior art has the problems of low mixing efficiency and difficulty in taking out the anhydrous ammonium bifluoride product generated in the pipeline, thus the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a microchannel reaction device and method for preparing anhydrous ammonium bifluoride to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a microchannel reaction device for preparing anhydrous ammonium bifluoride, comprising a storage box, a plurality of bases are installed on the top outer wall of the storage box, heating mechanisms are installed on the bases, a reaction mechanism is installed inside the heating mechanism, the reaction mechanism comprises a reaction tube installed in the heating mechanism, a detachable discharge cover is connected to one of the pipe openings of the reaction tube by threaded rotation, two air inlet pipes are installed on the top outer wall of the reaction tube, a flow valve is installed on the air inlet pipe, a mixing mechanism for fully mixing the gas inside the reaction tube is installed on the inner wall and the outer wall of the discharge cover, a limiting mechanism for fixing the position of the discharge cover is installed on the heating mechanism and the discharge cover, a pressurizing mechanism for adjusting the internal pressure of the reaction tube is installed at the other pipe opening of the reaction tube, and a pushing mechanism for discharging the reaction product inside the reaction tube is installed on the pressurizing mechanism.

[0007] Furthermore, the mixing mechanism includes a sleeve rod rotatably connected to the two ends of the inner wall of the discharge cover, a circular groove is provided on the outer wall of the sleeve rod, a plug rod is inserted in the circular groove, a limiting block is fixedly connected to the outer wall of the plug rod, a limiting groove adapted to the limiting block is provided on the inner wall of the circular groove, the limiting block is inserted in the limiting groove, a spring is installed between the inner wall of the circular groove and the outer wall of the plug rod, circular rings are installed on the outer walls of the sleeve rod and the plug rod, a number of fan blades are installed on the outer walls of the circular rings, and the fan blades on the two circular rings are opposite to each other, a main gear and a sub-gear driven by a driving motor are rotatably connected to the two ends of the outer wall of the discharge cover, a toothed belt is provided on the outer wall of the discharge cover, the main gear and the sub-gear are meshed with the toothed belt, one of the sleeve rods is fixed to the main gear, and the other sleeve rod is fixed to the sub-gear.

[0008] Furthermore, the pressurizing mechanism includes an electric push rod installed on the outer wall of another tube opening of the reaction tube, one end of the output shaft of the electric push rod is fixedly connected to a round block, and the outer wall of the round block is in contact with the inner wall of the reaction tube.

[0009] Furthermore, the heating mechanism comprises a heating ring with a hollow interior installed on the outer wall of the reaction tube, a plurality of heating wires are installed between the inner walls at both ends of the heating ring, and the heating ring is filled with heating liquid.

[0010] Furthermore, the pushing mechanism includes a fixed rod rotatably connected to the outer wall of the round block, a transverse groove matching the fixed rod is opened on the outer wall of the discharge cover, the fixed rod is inserted in the transverse groove, a notch is opened on the outer wall of one end of the fixed rod, a threaded rod driven by a rotating motor embedded in the inner wall of the round block is rotatably connected between the inner wall of the notch and the outer wall of the round block, a sliding groove consistent with the length of the transverse groove is opened on the outer wall of the fixed rod, a moving block matching the sliding groove is rotatably connected to the outer wall of the threaded rod through a thread, a pushing plate fitting the round block is sleeved on the outer wall of one end of the fixed rod, and the moving block is fixedly connected to the pushing plate.

[0011] Furthermore, the limiting mechanism includes an ear plate installed on the outer wall of the other end of the heating ring, a through slot is opened on the ear plate, a slot is opened on the top of the outer wall of the discharge cover, and a limiting pin is inserted in the through slot and the slot.

[0012] Furthermore, a delivery pipe is installed on the outer wall of the storage box, a water pump is installed on the outer wall of the delivery pipe, a liquid inlet pipe connected to the delivery pipe is installed on the top of the outer wall of the heating ring, a liquid discharge pipe connected to the storage box is installed on the bottom outer wall of the heating ring, valves are installed on the liquid inlet pipe and the liquid discharge pipe, and a pressure sensor and a temperature sensor are installed on the top of the inner wall of the reaction tube.

[0013] A microchannel reaction method for preparing anhydrous ammonium bifluoride uses the above-mentioned microchannel reaction device for preparing anhydrous ammonium bifluoride, including presetting the raw material introduction amount, reaction time, reaction temperature and reaction pressure, introducing ammonia and hydrogen fluoride into a reaction tube through two air inlet pipes, recording the introduction amount of ammonia and hydrogen fluoride through a flow valve, closing the flow valve when the introduction amount of ammonia and hydrogen fluoride is consistent with the raw material introduction amount, heating the internal temperature of the reaction tube to the same as the reaction temperature through a heating mechanism, adjusting the internal pressure of the reaction tube to the same as the reaction pressure through a pressurizing mechanism, fully mixing ammonia and hydrogen fluoride through a mixing mechanism, allowing ammonia and hydrogen fluoride to fully react to generate anhydrous ammonium bifluoride, canceling the limit of a discharge cover by a limit mechanism when the reaction time reaches the reaction time, removing the discharge cover, and pushing anhydrous ammonium bifluoride out of the reaction tube through a pushing mechanism to obtain anhydrous ammonium bifluoride.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The microchannel reaction device and method for preparing anhydrous ammonium bifluoride can adjust the temperature and pressure inside a reaction tube by means of a heating mechanism and a pressurizing mechanism, so as to achieve the effect of improving the reaction efficiency; the mixing mechanism can generate air convection by using relative fan blades to fully mix ammonia and hydrogen fluoride, which is beneficial to enhancing the mixing efficiency of ammonia and hydrogen fluoride, so as to achieve the effect of improving the reaction efficiency; the reaction rate, product recovery rate and purity can be further improved by the cooperation of the heating mechanism, the pressurizing mechanism and the mixing mechanism; the anhydrous ammonium bifluoride obtained by the reaction can be pushed out of the reaction tube by means of a pushing mechanism, so that the staff can collect the reaction product conveniently, and the efficiency of preparing anhydrous ammonium bifluoride is improved.

[0016] At the same time, the component providing air convection in the mixing mechanism has a telescopic effect, which is beneficial to the operation of the pressurizing mechanism. The pushing plate in the pushing mechanism fits the inner wall of the reaction tube, which is convenient for scraping off the anhydrous ammonium bifluoride attached to the inner wall of the reaction tube, achieving a cleaning effect and facilitating use.

[0017] At the same time, the storage box has a heat-insulating effect. The interior of the storage box is used to store the heating liquid. Through the cooperation of the delivery pipe, water pump, liquid inlet pipe, liquid discharge pipe and valve, a liquid circulation loop can be formed. The heated heating liquid can be stored after the reaction is completed for use in subsequent preparation, which is beneficial to reduce energy loss and preparation costs and save resources. Through the pressure sensor and temperature sensor, the staff can monitor the environmental changes inside the reaction tube, so that the staff can intervene and adjust in time to ensure the normal operation of the preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the reaction mechanism structure of the present invention;

[0020] Figure 3 It is a schematic cross-sectional structural diagram of the heating mechanism of the present invention;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the reaction tube of the present invention;

[0022] Figure 5 It is a schematic diagram of the enlarged structure of point A of the present invention;

[0023] Figure 6 It is a schematic diagram of the enlarged structure of point B of the present invention;

[0024] Figure 7 It is a schematic diagram of the cross-sectional structure of the fixing rod of the present invention;

[0025] Figure 8 It is a schematic diagram of the cross-sectional structure of the sleeve rod of the present invention.

[0026] In the figure: 1. storage box; 2. reaction mechanism; 201. reaction tube; 202. air inlet pipe; 203. flow valve; 204. discharge cover; 3. base; 4. delivery pipe; 5. water pump; 6. heating mechanism; 601. heating ring; 602. heating wire; 7. pressurizing mechanism; 701. electric push rod; 702. round block; 8. limit mechanism; 801. ear plate; 802. slot; 803. limit pin; 9. , mixing mechanism; 901, sleeve rod; 902, ring; 903, plug rod; 904, fan blade; 905, main gear; 906, toothed belt; 907, sub-gear; 908, spring; 10, pushing mechanism; 1001, fixed rod; 1002, threaded rod; 1003, pushing plate; 1004, moving block; 11, liquid inlet pipe; 12, liquid discharge pipe; 13, pressure sensor; 14, temperature sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the process of preparing anhydrous ammonium bifluoride, a reaction device is required. The reaction device provided by the present invention is specifically used for efficiently preparing and removing anhydrous ammonium bifluoride. In the process of using the device to prepare anhydrous ammonium bifluoride, it is necessary to ensure in advance that the heating liquid inside the heating ring is sufficient and the components that need power supply in the device are powered. At the same time, when introducing ammonia and hydrogen fluoride into the reaction tube, safety needs to be paid attention to, so as to ensure the normal operation of the reaction device.

[0029] like Figure 1-Figure 8 As shown, the present invention provides a technical solution: a microchannel reaction device for preparing anhydrous ammonium bifluoride, comprising a storage box 1, a plurality of bases 3 are installed on the top outer wall of the storage box 1, a heating mechanism 6 is installed on each base 3, a reaction mechanism 2 is installed inside the heating mechanism 6, the reaction mechanism 2 comprises a reaction tube 201 installed in the heating mechanism 6, a detachable discharge cover 204 is connected to one of the tube openings of the reaction tube 201 by threaded rotation, and two air inlet pipes 202 are installed on the top outer wall of the reaction tube 201. A flow valve 203 is installed on the air inlet pipe 202, a mixing mechanism 9 for fully mixing the gas inside the reaction tube 201 is installed on the inner wall and the outer wall of the discharge cover 204, a limiting mechanism 8 for fixing the position of the discharge cover 204 is installed on the heating mechanism 6 and the discharge cover 204, a pressurizing mechanism 7 for adjusting the internal pressure of the reaction tube 201 is installed at the other pipe mouth of the reaction tube 201, and a pushing mechanism 10 for discharging the reaction product inside the reaction tube 201 is installed on the pressurizing mechanism 7.

[0030] It should be noted that, by setting up several reaction mechanisms 2, multiple groups of anhydrous ammonium bifluoride can be prepared at the same time. In the process of preparing anhydrous ammonium bifluoride, first, ammonia and hydrogen fluoride as reaction raw materials need to be introduced into the reaction tube 201 through the air inlet pipe 202. The flow valve 203 can record the introduction amount of ammonia and hydrogen fluoride, and at the same time provide the effect of closing and opening the air inlet pipe 202 for air intake. Then, by starting the heating mechanism 6 and the pressurizing mechanism 7, the internal environment of the reaction tube 201 is adjusted to be suitable for the reaction of ammonia and hydrogen fluoride. Then, by starting the mixing mechanism 9, ammonia and hydrogen fluoride are fully mixed and reacted to generate anhydrous ammonium bifluoride. After the reaction is completed, the limiting effect of the limiting mechanism 8 on the discharge cover 204 is cancelled, and the discharge cover 204 is removed. The discharge cover 204 is removed, and the anhydrous ammonium bifluoride can be pushed out of the reaction tube 201 by starting the pushing mechanism 10 to discharge the material. The temperature and pressure inside the reaction tube 201 can be adjusted by the provided heating mechanism 6 and the pressurizing mechanism 7 to achieve the effect of improving the reaction efficiency. The provided mixing mechanism 9 can enhance the mixing of ammonia and hydrogen fluoride to achieve the effect of improving the reaction efficiency. The cooperation of the heating mechanism 6, the pressurizing mechanism 7 and the mixing mechanism 9 can further improve the reaction rate, the product recovery rate and the purity. At the same time, the provided pushing mechanism 10 can push the anhydrous ammonium bifluoride obtained by the reaction out of the reaction tube 201, so that the staff can collect the reaction product and improve the efficiency of preparing anhydrous ammonium bifluoride.

[0031] like Figure 4 , Figure 5 and Figure 8 As shown, the mixing mechanism 9 includes a sleeve rod 901 rotatably connected to both ends of the inner wall of the discharge cover 204, a circular groove is provided on the outer wall of the sleeve rod 901, a plug rod 903 is inserted in the circular groove, a limiting block is fixedly connected to the outer wall of the plug rod 903, a limiting groove adapted to the limiting block is provided on the inner wall of the circular groove, the limiting block is inserted in the limiting groove, a spring 908 is installed between the inner wall of the circular groove and the outer wall of the plug rod 903, and a circular ring 902 is installed on the outer walls of the sleeve rod 901 and the plug rod 903. A plurality of blades 904 are installed on the outer wall of the circular ring 902, and the blades 904 on the two circular rings 902 are opposite to each other. A main gear 905 and a sub gear 907 driven by a driving motor are rotatably connected to the two ends of the outer wall of the discharge cover 204, and a toothed belt 906 is arranged on the outer wall of the discharge cover 204. The main gear 905 and the sub gear 907 are both engaged with the toothed belt 906. One sleeve rod 901 is fixed to the main gear 905, and the other sleeve rod 901 is fixed to the sub gear 907.

[0032] It should be noted that when the mixing mechanism 9 needs to be used, the main gear 905 is driven to rotate by starting the driving motor, and the sub-gear 907 is driven to rotate through the action of the toothed belt 906, thereby driving the two sleeve rods 901 on the discharge cover 204 to rotate, and under the action of the limit block and the limit groove, the plug rod 903 on the sleeve rod 901 is driven to rotate, thereby driving the ring 902 and the fan blades 904 on the ring 902 to rotate, and then the sleeve rod 901 is relative to the fan blades 904 on the plug rod 903, so that convection can be generated during rotation, so that the ammonia and hydrogen fluoride in the reaction tube 201 are fully mixed, and the mixing mechanism 9 is integrated on the discharge cover 204. When the discharge cover 204 is removed, the mixing mechanism 9 can be removed, which is convenient for cleaning or maintenance of the mixing mechanism 9. The spring 908 set in the sleeve rod 901 can make the plug rod 903 have a telescopic effect, which is beneficial to the operation of the pressurizing mechanism 7.

[0033] like Figure 4 As shown, the pressurizing mechanism 7 includes an electric push rod 701 installed on the outer wall of the other tube opening of the reaction tube 201 , and one end of the output shaft of the electric push rod 701 is fixedly connected to a round block 702 , and the outer wall of the round block 702 is in contact with the inner wall of the reaction tube 201 .

[0034] It should be noted that when the pressurizing mechanism 7 is needed, the closed reaction space inside the reaction tube 201 can be adjusted by starting the electric push rod 701 to drive the round block 702 to move, thereby achieving the effect of adjusting the internal pressure of the reaction tube 201.

[0035] like Figure 3 As shown, the heating mechanism 6 includes a hollow heating ring 601 installed on the outer wall of the reaction tube 201 , a plurality of heating wires 602 are installed between the inner walls at both ends of the heating ring 601 , and the heating ring 601 is filled with heating liquid.

[0036] It should be noted that the heating liquid is a liquid that can be heated and heated, such as water or coolant. When the heating mechanism 6 needs to be started, the heating wire 602 can be operated to heat and heat the heating liquid inside the heating ring 601, thereby increasing the temperature inside the reaction tube 201.

[0037] like Figure 4 , Figure 6 and Figure 7As shown, the pushing mechanism 10 includes a fixed rod 1001 rotatably connected to the outer wall of the round block 702, a transverse groove adapted to the fixed rod 1001 is opened on the outer wall of the discharge cover 204, the fixed rod 1001 is inserted in the transverse groove, a notch is opened on the outer wall of one end of the fixed rod 1001, a threaded rod 1002 driven by a rotating motor embedded in the inner wall of the round block 702 is rotatably connected between the inner wall of the notch and the outer wall of the round block 702, a sliding groove consistent with the length of the transverse groove is opened on the outer wall of the fixed rod 1001, a moving block 1004 adapted to the sliding groove is rotatably connected to the outer wall of the threaded rod 1002 through a thread, a pushing plate 1003 fitted with the round block 702 is sleeved on the outer wall of one end of the fixed rod 1001, and the moving block 1004 is fixedly connected to the pushing plate 1003.

[0038] It should be noted that when the pushing mechanism 10 needs to be used, the discharge cover 204 needs to be removed from the reaction tube 201, and the threaded rod 1002 is driven to rotate by starting the rotary motor, thereby driving the moving block 1004 and the pushing plate 1003 connected to the moving block 1004 to move, so that the anhydrous ammonium bifluoride inside the reaction tube 201 can be discharged, and the pushing plate 1003 fits the inner wall of the reaction tube 201, which is convenient for scraping off the anhydrous ammonium bifluoride attached to the inner wall of the reaction tube 201, achieving a cleaning effect and facilitating use.

[0039] like Figure 5 As shown, the limiting mechanism 8 includes an ear plate 801 installed on the outer wall of the other end of the heating ring 601, a through groove is opened on the ear plate 801, and a slot 802 is opened on the top of the outer wall of the discharge cover 204, and a limiting pin 803 is inserted in the through groove and the slot 802.

[0040] It should be noted that when it is necessary to release the limit on the discharge cover 204, the limit can be released by pulling the limit pin 803 out of the slot 802 and the through slot. Conversely, the discharge cover 204 can be limited and fixed again to prevent the discharge cover 204 from falling off.

[0041] like Figure 1 and Figure 4 As shown, a delivery pipe 4 is installed on the outer wall of the storage box 1, a water pump 5 is installed on the outer wall of the delivery pipe 4, a liquid inlet pipe 11 connected to the delivery pipe 4 is installed on the top of the outer wall of the heating ring 601, a liquid discharge pipe 12 connected to the storage box 1 is installed on the bottom outer wall of the heating ring 601, valves are installed on the liquid inlet pipe 11 and the liquid discharge pipe 12, and a pressure sensor 13 and a temperature sensor 14 are installed on the top of the inner wall of the reaction tube 201.

[0042] It should be noted that the storage box 1 has a heat preservation effect. The interior of the storage box 1 is used to store the heating liquid. Through the cooperation of the delivery pipe 4, water pump 5, liquid inlet pipe 11, liquid discharge pipe 12 and valve, a liquid circulation loop can be formed. The heated heating liquid can be stored after the reaction is completed for use in subsequent preparation, which is beneficial to reduce energy loss and preparation cost and save resources. The pressure sensor 13 and temperature sensor 14 are set to facilitate the staff to monitor the environmental changes inside the reaction tube 201, so that the staff can intervene and adjust in time to ensure the normal operation of the preparation.

[0043] The microchannel reaction method for preparing anhydrous ammonium bifluoride comprises the following steps: presetting the raw material introduction amount, reaction time, reaction temperature and reaction pressure, introducing ammonia and hydrogen fluoride into a reaction tube 201 through two air inlet pipes 202, recording the introduction amount of ammonia and hydrogen fluoride through a flow valve 203, closing the flow valve 203 when the introduction amount of ammonia and hydrogen fluoride is consistent with the raw material introduction amount, heating the internal temperature of the reaction tube 201 to the same as the reaction temperature through a heating mechanism 6, adjusting the internal pressure of the reaction tube 201 to the same as the reaction pressure through a pressurizing mechanism 7, fully mixing the ammonia and hydrogen fluoride through a mixing mechanism 9, allowing the ammonia and hydrogen fluoride to fully react to generate anhydrous ammonium bifluoride, canceling the limit of a discharge cover 204 by a limit mechanism 8 when the reaction time reaches the reaction time, removing the discharge cover 204, and pushing the anhydrous ammonium bifluoride out of the reaction tube 201 through a pushing mechanism 10, thereby obtaining anhydrous ammonium bifluoride.

[0044] It should be noted that the amount of raw material introduced is determined by how much anhydrous ammonium bifluoride the staff needs to prepare. The amount of raw material introduced includes the amount of ammonia introduced and the amount of hydrogen fluoride introduced. The reaction time, reaction temperature and reaction pressure are determined by the staff according to actual conditions. The reaction time is the time it takes for ammonia and hydrogen fluoride to react in a mixed manner.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A microchannel reaction device for preparing anhydrous ammonium bifluoride, comprising a storage box (1), characterized in that: A plurality of bases (3) are mounted on the top outer wall of the storage box (1), each of the bases (3) being mounted with a heating mechanism (6), a reaction mechanism (2) being mounted inside the heating mechanism (6), the reaction mechanism (2) comprising a reaction tube (201) mounted in the heating mechanism (6), a detachable discharge cover (204) being rotatably connected to one of the tube openings of the reaction tube (201) by means of a thread, two air inlet pipes (202) being mounted on the top outer wall of the reaction tube (201), a flow valve (203) being mounted on the air inlet pipe (202), A mixing mechanism (9) for fully mixing the gas inside the reaction tube (201) is installed on the inner wall and the outer wall of the discharge cover (204); a limiting mechanism (8) for fixing the position of the discharge cover (204) is installed on the heating mechanism (6) and the discharge cover (204); a pressurizing mechanism (7) for adjusting the internal pressure of the reaction tube (201) is installed at another tube mouth of the reaction tube (201); and a pushing mechanism (10) for discharging the reaction product inside the reaction tube (201) is installed on the pressurizing mechanism (7).

2. The microchannel reaction device for preparing anhydrous ammonium bifluoride according to claim 1, characterized in that: The mixing mechanism (9) comprises a sleeve rod (901) rotatably connected to the inner wall of the discharge cover (204) at both ends, a circular groove is provided on the outer wall of the sleeve rod (901), a plug rod (903) is inserted in the circular groove, a limit block is fixedly connected to the outer wall of the plug rod (903), a limit groove adapted to the limit block is provided on the inner wall of the circular groove, the limit block is inserted in the limit groove, a spring (908) is installed between the inner wall of the circular groove and the outer wall of the plug rod (903), and a circular ring (902) is installed on the outer walls of the sleeve rod (901) and the plug rod (903), and the circular ring (90 2) are each provided with a plurality of blades (904), the blades (904) on the two rings (902) are opposite to each other, a main gear (905) and a sub-gear (907) driven by a driving motor are rotatably connected at both ends of the outer wall of the discharge cover (204), a toothed belt (906) is provided on the outer wall of the discharge cover (204), the main gear (905) and the sub-gear (907) are both meshed with the toothed belt (906), one sleeve rod (901) is fixed to the main gear (905), and the other sleeve rod (901) is fixed to the sub-gear (907).

3. The microchannel reaction device for preparing anhydrous ammonium bifluoride according to claim 1, characterized in that: The pressurizing mechanism (7) comprises an electric push rod (701) mounted on the outer wall of another tube opening of the reaction tube (201), one end of the output shaft of the electric push rod (701) is fixedly connected to a round block (702), and the outer wall of the round block (702) is in contact with the inner wall of the reaction tube (201).

4. The microchannel reaction device for preparing anhydrous ammonium bifluoride according to claim 1, characterized in that: The heating mechanism (6) comprises a heating ring (601) with a hollow interior installed on the outer wall of the reaction tube (201), a plurality of heating wires (602) are installed between the inner walls at both ends of the heating ring (601), and the heating ring (601) is filled with a heating liquid.

5. The microchannel reaction device for preparing anhydrous ammonium bifluoride according to claim 1, characterized in that: The pushing mechanism (10) comprises a fixing rod (1001) rotatably connected to the outer wall of the round block (702); a transverse groove adapted to the fixing rod (1001) is provided on the outer wall of the discharge cover (204); the fixing rod (1001) is inserted into the transverse groove; a notch is provided on the outer wall of one end of the fixing rod (1001); the inner wall of the notch is rotatably connected to the outer wall of the round block (702) by a locking member embedded in the inner wall of the round block (702). A threaded rod (1002) is driven by a rotating motor, a sliding groove having the same length as the horizontal groove is provided on the outer wall of the fixed rod (1001), a moving block (1004) adapted to the sliding groove is rotatably connected to the outer wall of the threaded rod (1002) through a thread, a pushing plate (1003) fitted with the round block (702) is sleeved on the outer wall of one end of the fixed rod (1001), and the moving block (1004) is fixedly connected to the pushing plate (1003).

6. The microchannel reaction device for preparing anhydrous ammonium bifluoride according to claim 1, characterized in that: The limiting mechanism (8) comprises an ear plate (801) installed on the outer wall of the other end of the heating ring (601), a through slot is provided on the ear plate (801), a slot (802) is provided on the top of the outer wall of the discharge cover (204), and a limiting pin (803) is inserted in the through slot and the slot (802).

7. The microchannel reaction device for preparing anhydrous ammonium bifluoride according to claim 1, characterized in that: A delivery pipe (4) is installed on the outer wall of the storage box (1), a water pump (5) is installed on the outer wall of the delivery pipe (4), a liquid inlet pipe (11) connected to the delivery pipe (4) is installed on the top of the outer wall of the heating ring (601), a liquid discharge pipe (12) connected to the storage box (1) is installed on the bottom outer wall of the heating ring (601), valves are installed on the liquid inlet pipe (11) and the liquid discharge pipe (12), and a pressure sensor (13) and a temperature sensor (14) are installed on the top of the inner wall of the reaction tube (201).

8. A microchannel reaction method for preparing anhydrous ammonium bifluoride, characterized in that: A microchannel reaction device for preparing anhydrous ammonium bifluoride according to any one of claims 1 to 7 is used, comprising a preset raw material introduction amount, reaction time, reaction temperature and reaction pressure, introducing ammonia and hydrogen fluoride into a reaction tube (201) through two air inlet pipes (202), recording the introduction amount of ammonia and hydrogen fluoride through a flow valve (203), and when the introduction amount of ammonia and hydrogen fluoride is consistent with the introduction amount of the raw material, closing the flow valve (203), and heating the internal temperature of the reaction tube (201) to a temperature of 100°C by a heating mechanism (6). In accordance with the reaction temperature, the internal pressure of the reaction tube (201) is adjusted to be consistent with the reaction pressure by the pressurizing mechanism (7), and the ammonia gas and the hydrogen fluoride are fully mixed by the mixing mechanism (9) so that the ammonia gas and the hydrogen fluoride are fully reacted to generate anhydrous ammonium bifluoride. When the reaction time reaches the reaction time, the limiting mechanism (8) on the discharge cover (204) is cancelled, and the discharge cover (204) is removed, and the anhydrous ammonium bifluoride is pushed out of the reaction tube (201) by the pushing mechanism (10), thereby obtaining anhydrous ammonium bifluoride.

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