Micro-channel reaction device for preparing anhydrous ammonium bifluoride
By using a microchannel reaction device in the preparation of anhydrous ammonium bifluoride, and by setting up a stirring structure and catalyst, the problems of complex equipment and high energy consumption in traditional methods have been solved, and efficient reaction and stable product generation have been achieved.
Patent Information
- Application Number
- CN202520308981.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Traditional methods for preparing anhydrous ammonium bifluoride involve complex equipment, high energy consumption, and incomplete reactions, resulting in unstable product quality.
A microchannel reaction device is used, including a raw material tank, a vaporizer, a microchannel reactor, and a shell-and-tube heat exchanger. A stirring structure and a catalyst are set up. The gas flow rate is increased by stirring rods, which increases the contact area and residence time of the reactant gases, and the catalyst is used to promote the reaction.
It improves reaction efficiency, produces anhydrous ammonium bifluoride with stable quality, reduces energy consumption, and extends equipment lifespan.
Smart Images
Figure CN223969948U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anhydrous ammonium fluoride preparation technology, specifically to a microchannel reaction device for preparing anhydrous ammonium fluoride. Background Technology
[0002] Anhydrous ammonium fluoride is an important chemical raw material widely used in electronics, refrigeration, pharmaceuticals, and other fields. Traditional methods for preparing anhydrous ammonium fluoride suffer from problems such as complex equipment, high energy consumption, and unstable product quality. The internal microchannel reactor has a simple structure, but due to the lack of a stirring mechanism and catalyst, it cannot increase the gas flow rate, leading to incomplete reaction, reduced contact area and residence time of the reactant gases, and decreased reaction efficiency. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides a microchannel reaction device for preparing anhydrous ammonium bifluoride, which has advantages such as high efficiency and solves the problems mentioned in the background technology.
[0004] To achieve the aforementioned high efficiency, this utility model provides the following technical solution: a microchannel reaction device for preparing anhydrous ammonium bifluoride, comprising a raw material tank, a vaporizer, a microchannel reactor, and a shell-and-tube heat exchanger. The raw material tank has a feed inlet installed at the middle of its upper end, and a first conduit connected to the lower end of the raw material tank. The front end of the first conduit is connected to the vaporizer, and the front end of the vaporizer is connected to a second conduit. The front end of the second conduit is connected to the microchannel reactor, and the front end of the microchannel reactor is connected to a third conduit. The front end of the third conduit is connected to the shell-and-tube heat exchanger.
[0005] Two drive motors are installed at the upper end of the microchannel reactor. Each drive motor has a stirring rod mounted on its lower end via a motor shaft. Each stirring rod has multiple stirring blades. A microchannel groove is installed in the middle of the microchannel reactor. Multiple channels are distributed inside the microchannel groove. Two catalysts are installed at the bottom of the microchannel reactor.
[0006] As a further improvement of this utility model: a back pressure valve is installed in the middle of the first conduit, and a feed pump is provided behind the back pressure valve. The feed pump is an acid and alkali resistant electromagnetic diaphragm pump, which improves the acid and alkali resistance.
[0007] As a further improvement of this utility model: a drain pipe is connected to the middle of the front end of the shell-and-tube heat exchanger, and a collection tank is provided at the lower end of the drain pipe. Anhydrous ammonium bifluoride flows into the collection tank through the drain pipe for collection.
[0008] As a further improvement of this utility model: a support frame is provided at the lower end of the raw material tank, and three support feet are installed at the lower end of the support frame. The support frame supports the raw material tank and improves its stability.
[0009] As a further improvement of this utility model: a limiting frame is installed on the shell-and-tube heat exchanger, and two limiting frames are provided to support and fix the shell-and-tube heat exchanger.
[0010] As a further improvement of this utility model, the raw material tank is made of aluminum alloy material, and the inner wall of the raw material tank is provided with an anti-corrosion layer, which can improve the corrosion resistance of the raw material tank and thus improve its service life.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] In this invention, two drive motors are activated, and the drive motors drive the stirring rod to rotate through the motor shaft, which accelerates the flow rate of ammonium bifluoride gas. The microchannel tank is equipped with multiple channels, which can increase the contact area and residence time of the reaction gas, improve the reaction efficiency, and react with other reactants under the action of the catalyst to generate anhydrous ammonium bifluoride and other by-products, so that the reaction is complete. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the appearance of the present utility model;
[0014] Figure 2 This is a schematic diagram of the microchannel reactor in this utility model;
[0015] Figure 3 This is a schematic diagram of the material structure of the raw material tank in this utility model;
[0016] In the diagram: 1. Raw material tank; 2. Feed inlet; 3. Support frame; 4. Back pressure valve; 5. First conduit; 6. Vaporizer; 7. Drive motor; 8. Microchannel reactor; 9. Shell-and-tube heat exchanger; 10. Limiting frame; 11. Drain pipe; 12. Collection tank; 13. Microchannel trough; 14. Stirring rod; 15. Catalyst; 16. Anti-corrosion layer. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] It should be noted that the vaporizer 6, the microchannel reactor 8, and the shell-and-tube heat exchanger 9 are all existing technologies and are common knowledge to those skilled in the art, and will not be elaborated upon here.
[0019] Please see Figures 1-3 In this embodiment of the present invention, a microchannel reaction device for preparing anhydrous ammonium bifluoride includes a raw material tank 1, a vaporizer 6, a microchannel reactor 8, and a shell-and-tube heat exchanger 9. A feed inlet 2 is installed in the middle of the upper end of the raw material tank 1, and a first conduit 5 is connected to the lower end of the raw material tank 1. The front end of the first conduit 5 is connected to the vaporizer 6. The front end of the vaporizer 6 is connected to a second conduit. The front end of the second conduit is connected to the microchannel reactor 8. The front end of the microchannel reactor 8 is connected to a third conduit. The front end of the third conduit is connected to the shell-and-tube heat exchanger 9.
[0020] Two drive motors 7 are installed at the upper end of the microchannel reactor 8. Each drive motor 7 has a stirring rod 14 installed at the lower end via a motor shaft. Each stirring rod 14 is equipped with multiple stirring blades. A microchannel trough 13 is installed in the middle of the microchannel reactor 8. Multiple channels are distributed inside the microchannel trough 13. Two catalysts 15 are installed at the bottom of the microchannel reactor 8.
[0021] A back pressure valve 4 is installed in the middle of the first conduit 5, and a feed pump is installed behind the back pressure valve 4. The feed pump is an acid and alkali resistant electromagnetic diaphragm pump, which improves the acid and alkali resistance. A drain pipe 11 is connected to the middle of the front end of the shell-and-tube heat exchanger 9. A collection tank 12 is installed at the lower end of the drain pipe 11. Anhydrous ammonium bifluoride flows into the collection tank 12 through the drain pipe 11 for collection. A support frame 3 is installed at the lower end of the raw material tank 1. The support frame 3 is equipped with three support feet at the lower end of the support frame 3 to support the raw material tank 1 and improve its stability. Two limit frames 10 are installed on the shell-and-tube heat exchanger 9. The two limit frames 10 support and fix the shell-and-tube heat exchanger 9. The raw material tank 1 is made of aluminum alloy material, and the inner wall of the raw material tank 1 is provided with an anti-corrosion layer 16, which can improve the corrosion resistance of the raw material tank 1 and thus improve its service life.
[0022] The working principle of this invention is as follows: Ammonium bifluoride is injected into the raw material tank 1 through the feed inlet 2. The feed pump is started to pressurize the liquid ammonium bifluoride, which then enters the vaporizer 6 through the back pressure valve 4. The vaporizer 6 is started, and the liquid ammonium bifluoride is vaporized into dry hydrogen fluoride gas, which enters the microchannel reactor 8 through the second conduit. Two drive motors 7 are started, and the drive motors 7 drive the stirring rod 14 to rotate through the motor shaft, which accelerates the flow rate of the ammonium bifluoride gas. The microchannel tank 13 is equipped with multiple channels, which can increase the contact area and residence time of the reaction gas, thereby improving the reaction efficiency. The gas reacts with other reactants under the action of catalyst 15 to generate anhydrous ammonium bifluoride and other byproducts. The gas then enters the shell-and-tube heat exchanger 9 through the third conduit to cool the gas and liquefy the generated anhydrous ammonium bifluoride. The liquefied gas then flows into the collection tank 12 through the drain pipe 11 for collection. The support frame 3 supports the raw material tank 1, improving its stability. Two limiting frames 10 support and fix the shell-and-tube heat exchanger 9. The inner wall of the raw material tank 1 is provided with an anti-corrosion layer 16, which can improve the corrosion resistance of the raw material tank 1 and thus improve its service life.
[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A micro-channel reaction device for preparing anhydrous ammonium bifluoride, comprising a raw material tank (1), a vaporizer (6), a micro-channel reactor (8) and a tube-shell heat exchanger (9), a feed inlet (2) is installed in the middle of the upper end of the raw material tank (1), a first conduit (5) is connected to the lower end of the raw material tank (1), the front end of the first conduit (5) is communicated with the vaporizer (6), a second conduit is connected to the front end of the vaporizer (6), the front end of the second conduit is communicated with the micro-channel reactor (8), a third conduit is connected to the front end of the micro-channel reactor (8), and the front end of the third conduit is communicated with the tube-shell heat exchanger (9). characterized in that Two drive motors (7) are installed on the upper end of the micro-channel reactor (8), a stirring rod (14) is installed on the lower end of each drive motor (7) through a motor shaft, a plurality of stirring blades are arranged on the stirring rod (14), a micro-channel groove (13) is installed in the middle of the micro-channel reactor (8), a plurality of channels are distributed in the micro-channel groove (13), and two catalysts (15) are installed on the bottom end of the micro-channel reactor (8).
2. The microchannel reaction apparatus for producing anhydrous ammonium bifluoride according to claim 1, characterized by: A back pressure valve (4) is installed in the middle of the first conduit (5), a feed pump is arranged at the rear of the back pressure valve (4), and the feed pump is an acid and alkali resistant electromagnetic diaphragm pump.
3. The microchannel reaction apparatus for producing anhydrous ammonium bifluoride according to claim 1, characterized by: A liquid discharge pipe (11) is connected to the middle of the front end of the tube-shell heat exchanger (9), and a collection tank (12) is arranged at the lower end of the liquid discharge pipe (11).
4. The microchannel reaction apparatus for producing anhydrous ammonium bifluoride according to claim 1, characterized by: A support frame (3) is arranged at the lower end of the raw material tank (1), and three supporting legs are installed on the lower end of the support frame (3).
5. The microchannel reaction apparatus for producing anhydrous ammonium bifluoride according to claim 1, characterized by: A limiting frame (10) is installed on the tube-shell heat exchanger (9), and the limiting frame (10) is provided with two.
6. The microchannel reaction apparatus for producing anhydrous ammonium bifluoride according to claim 1, characterized by: The raw material tank (1) is made of aluminum alloy material, and an anti-corrosion layer (16) is arranged on the inner wall of the raw material tank (1).