Efficient ammonia synthesis catalyst reaction device
By designing a high-efficiency ammonia synthesis catalyst reaction device, the reaction surface area is increased by circulating pumps and central dust blowing tubes, and the activity is improved through catalyst reduction, the problem of frequent catalyst activity in the prior art is solved, and the effect of improving reaction efficiency and reducing production costs is achieved.
Patent Information
- Application Number
- CN202422175555.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-05
AI Technical Summary
The activity of existing synthetic ammonia catalysts decreases after long-term use, the reaction efficiency decreases, and the catalyst is frequently replaced, which increases production costs.
A high-efficiency ammonia synthesis catalyst reaction device is designed to pump the gas catalyst to the reaction tank through a circulation pump, and the catalyst is evenly sprayed in the reaction tank using a central dust blowing tube to increase the reaction surface area. At the same time, the catalyst is reduced by leaking into the catalyst reduction box through a conical cylinder to enhance the activity of the catalyst.
The reaction efficiency between nitrogen and hydrogen and the catalyst is improved, the service life of the catalyst is extended, the frequency of catalyst replacement is reduced, and the production cost is reduced.
Smart Images
Figure CN222956361U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammonia synthesis production, in particular to a reaction device for an efficient ammonia synthesis catalyst. Background Technique
[0002] Ammonia synthesis is an important chemical production process for producing ammonia gas (NH 3 ). Ammonia is an important raw material for the production of nitrogen fertilizers and many chemical products. The chemical reaction formula for ammonia synthesis is: N 2 + 3H 2 ⇌ 2NH 3 . This reaction needs to be carried out under high temperature, high pressure and the presence of a catalyst. The process development of ammonia synthesis has gone through a long process. The early ammonia synthesis methods had low efficiency and high costs. With the progress of science and technology, today's ammonia synthesis process has been continuously optimized, improving the yield and energy utilization rate. Industrially, ammonia synthesis usually adopts the Haber process. In this method, through a large synthesis tower, nitrogen and hydrogen are mixed in a certain ratio and then react under high temperature, high pressure and the action of a catalyst to produce ammonia. The production of ammonia synthesis is of extremely important significance for the development of agriculture. An adequate supply of nitrogen fertilizers helps to increase the yield of crops. At the same time, ammonia is also the basic raw material for many chemical products such as nitric acid and ammonium salts, and has a wide range of applications in many fields such as chemical industry, pharmaceuticals, plastics, etc.
[0003] The production process of ammonia synthesis mainly includes the following steps: Preparation of raw material gas: Obtaining nitrogen: Usually, nitrogen is obtained from the air through separation methods. The cryogenic separation method can be used to separate based on the different boiling points of oxygen and nitrogen. Production of hydrogen: Common methods include steam reforming using natural gas, naphtha, heavy oil, etc. as raw materials, and gasification using coal as raw material. For example, when using natural gas as raw material, it is converted into hydrogen and carbon monoxide through steam reforming reaction. Purification of raw material gas: Desulfurization: Removing sulfides in the raw material gas to prevent catalyst poisoning. Common methods include dry desulfurization and wet desulfurization. Carbon monoxide shift: Reacting carbon monoxide with steam to convert it into carbon dioxide and hydrogen to increase the content of hydrogen. Decarbonization: Removing carbon dioxide, usually using physical absorption or chemical absorption methods. Refining: Further removing trace impurities such as carbon monoxide, carbon dioxide, sulfides, etc. Common methods include methanation and copper ammonia solution washing. Ammonia synthesis: The purified nitrogen and hydrogen are mixed in a certain ratio and enter the synthesis tower. Under the action of high temperature (400 - 500 °C), high pressure (15 - 30 MPa) and a catalyst (such as iron catalyst), they react to produce ammonia. Ammonia separation: The reacted gas contains ammonia, unreacted nitrogen and hydrogen, etc. Ammonia is liquefied by cooling, thus separating it from the unreacted gas. The unreacted gas is compressed and recycled and then enters the synthesis tower again for reaction to increase the yield of ammonia.
[0004] The catalysts used in existing catalytic synthesis devices for ammonia synthesis have exposed many problems during long-term use. There are deficiencies in aspects such as activity, selectivity, and stability. This causes the reaction efficiency to gradually decrease, and it is unable to continuously maintain a high-efficiency ammonia synthesis reaction. At the same time, due to the attenuation of performance, the catalyst needs to be replaced frequently, which undoubtedly significantly increases the production cost. Utility Model Content
[0005] To make up for the above deficiencies, the present utility model provides a high-efficiency ammonia synthesis catalyst reaction device, aiming to improve the problems of low reaction efficiency in the existing ammonia synthesis production process and the decrease in catalyst activity during long-term use.
[0006] To achieve the above object, the present utility model adopts the following technical solution: A high-efficiency ammonia synthesis catalyst reaction device, including a support platform. The middle part inside the support platform is fixedly connected with a reduction tank. The middle part at the top of the reduction tank is fixedly connected with a return pipe. The top of the return pipe is fixedly connected with a reaction tank. The right end outside the support platform is fixedly connected with a pump frame. The middle part at the top of the pump frame is fixedly connected with a pump. The middle part at the bottom of the pump is fixedly connected with a suction pipe. The middle part at the left end of the pump is fixedly connected with a blowing pipe. The top and the upper middle part of the outside of the blowing pipe are both fixedly connected with rotating seats. A rotating shaft is rotatably connected between the rotating seats. The top and the bottom corners of the outside of the rotating shaft are both fixedly connected with rotating fan frames. Between the rotating fan frames, mixing fan blades are fixedly connected at equal intervals from left to right.
[0007] As a further description of the above technical solution:
[0008] All four corners at the bottom of the support platform are fixedly connected with legs.
[0009] As a further description of the above technical solution:
[0010] All four corners at the top of the support platform are fixedly connected with support frames. The top of the support frames is fixedly connected with a reaction platform.
[0011] As a further description of the above technical solution:
[0012] The left rear side at the top of the outside of the reaction tank is fixedly connected with a nitrogen pipe. The left front side at the top of the outside of the reaction tank is fixedly connected with a hydrogen pipe. The right front side at the bottom of the outside of the reaction tank is fixedly connected with an ammonia pipe.
[0013] As a further description of the above technical solution:
[0014] The left side at the bottom of the reduction tank is fixedly connected with a reduction feed pipe.
[0015] As a further description of the above technical solution:
[0016] On the outer side of the blowing pipe, pipe body brackets are fixedly connected to the upper middle part and the four corners of the middle part.
[0017] As a further description of the above technical solution:
[0018] On the left side of the top of the reduction tank, a catalytic feed pipe is fixedly connected, and a feed cover is arranged at the top of the catalytic feed pipe.
[0019] The utility model has the following beneficial effects:
[0020] 1. In the utility model, the gas catalyst is continuously pumped into the reaction tank through a circulation pump, and a central dust blowing pipe is used to evenly sprinkle the catalyst in the reaction tank, so as to increase the reaction surface area between the gas and the catalyst.
[0021] 2. In the utility model, the catalyst leaks into the catalyst reduction tank through a conical cylinder for reduction of the catalyst, so as to improve the activity of the catalyst, reduce the catalyst replacement frequency, and reduce the production cost consumption. Description of the Drawings
[0022] Figure 1 is a three-dimensional view of a high-efficiency ammonia synthesis catalyst reaction device proposed by the utility model;
[0023] Figure 2 is a structural schematic diagram of a catalytic reduction device of a high-efficiency ammonia synthesis catalyst reaction device proposed by the utility model;
[0024] Figure 3 is a sectional structural schematic diagram of a catalytic reaction device of a high-efficiency ammonia synthesis catalyst reaction device proposed by the utility model.
[0025] Legend Explanation:
[0026] 1. Reaction tank; 2. Support frame; 3. Reduction tank; 4. Support platform; 5. Reaction platform; 6. Catalytic feed pipe; 7. Feed cover; 8. Suction pipe; 9. Pump; 10. Pump frame; 11. Blowing pipe; 12. Pipe body bracket; 13. Return pipe; 14. Nitrogen pipe; 15. Hydrogen pipe; 16. Ammonia pipe; 17. Rotating seat; 18. Rotating fan frame; 19. Mixing fan blade; 20. Rotating shaft; 21. Reduction feed pipe; 22. Leg. Detailed Embodiment
[0027] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.
[0028] Referring to Figure 1 and Figure 3 One embodiment provided by the present utility model is: an efficient ammonia synthesis catalyst reaction device, including a support table 4, a reduction tank 3 is fixedly connected to the middle part inside the support table 4, a return pipe 13 is fixedly connected to the middle part of the top of the reduction tank 3, a reaction tank 1 is fixedly connected to the top of the return pipe 13, a pump stand 10 is fixedly connected to the right end outside the support table 4, a pump 9 is fixedly connected to the middle part of the top of the pump stand 10, a suction pipe 8 is fixedly connected to the middle part of the bottom of the pump 9. The catalyst in the reduction tank 3 is blown into the reaction tank 1 through the suction pipe 8 on the pump 9 by using a blowing pipe 11, so as to increase the contact area between nitrogen and hydrogen and the catalyst, improve the reaction efficiency of nitrogen and hydrogen, and improve the production efficiency of ammonia.
[0029] Referring to Figure 1 - Figure 2 A blowing pipe 11 is fixedly connected to the middle part of the left end of the pump 9. Rotating seats 17 are fixedly connected to the top and the upper middle part of the outside of the blowing pipe 11. A rotating shaft 20 is rotatably connected between the rotating seats 17. Rotating fan frames 18 are fixedly connected to the top and the four corners of the bottom of the outside of the rotating shaft 20. Mixing fan blades 19 are fixedly connected at equal intervals from left to right between the rotating fan frames 18. After the catalytic reaction is completed, the activity of the catalyst decreases. A reducing agent is pumped into the reduction tank 3 through a reduction feed pipe 21 to promote the activity improvement of the catalyst, reduce the catalyst replacement frequency, improve the catalyst utilization rate, and reduce the production cost.
[0030] Referring to Figure 1 - Figure 3 Legs 22 are fixedly connected to the four corners of the bottom of the support table 4. Support frames 2 are fixedly connected to the four corners of the top of the support table 4. A reaction table 5 is fixedly connected to the top of the support frames 2. A nitrogen pipe 14 is fixedly connected to the rear side of the top of the left end outside the reaction tank 1. A hydrogen pipe 15 is fixedly connected to the front side of the top of the left end outside the reaction tank 1. An ammonia pipe 16 is fixedly connected to the front side of the bottom of the right end outside the reaction tank 1. A reduction feed pipe 21 is fixedly connected to the left side of the bottom of the reduction tank 3. Pipe body supports 12 are fixedly connected to the upper middle part and the four corners of the middle part of the outside of the blowing pipe 11. A catalytic feed pipe 6 is fixedly connected to the left side of the top of the reduction tank 3. A feed cover 7 is arranged at the top of the catalytic feed pipe 6. When workers carry out the production of synthetic ammonia, the catalyst is added through the catalytic feed pipe 6. After the addition is completed, the catalytic feed pipe 6 is sealed through the feed cover 7. Subsequently, nitrogen and hydrogen are conveyed into the reaction tank 1 through the nitrogen pipe 14 and the hydrogen pipe 15, and the produced ammonia is conveyed to an ammonia storage tank through the ammonia pipe 16.
[0031] Working principle: When workers are producing synthetic ammonia, they add the catalyst through the catalytic feed pipe 6. After the addition is completed, the catalytic feed pipe 6 is sealed through the feed cover 7. Subsequently, nitrogen and hydrogen are transported into the reaction tank 1 through the nitrogen pipe 14 and the hydrogen pipe 15. At the same time, the catalyst in the reduction tank 3 is dispersed in the reaction tank 1 by the blowing pipe 11 through the suction pipe 8 on the pump 9, so as to increase the contact area between nitrogen and hydrogen and the catalyst, improve the reaction efficiency of nitrogen and hydrogen, and enhance the production efficiency of ammonia. The produced ammonia is transported to the ammonia storage tank through the ammonia pipe 16. After the catalytic reaction, the activity of the catalyst decreases. The reducing agent is pumped into the reduction tank 3 through the reduction feed pipe 21 to promote the activity improvement of the catalyst, reduce the catalyst replacement frequency, improve the catalyst utilization rate, and reduce the production cost.
[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A high-efficiency ammonia synthesis catalyst reaction device, comprising a support platform (4), characterized in that: A reduction tank (3) is fixedly connected to the middle of the inner side of the support platform (4), a return pipe (13) is fixedly connected to the middle of the top of the reduction tank (3), and a reaction tank (1) is fixedly connected to the top of the return pipe (13). A pump frame (10) is fixedly connected to the right end of the outer side of the support platform (4), a pump machine (9) is fixedly connected to the middle of the top of the pump frame (10), a suction pipe (8) is fixedly connected to the middle of the bottom of the pump machine (9), a blowing pipe (11) is fixedly connected to the middle of the left end of the pump machine (9), a rotating seat (17) is fixedly connected to the top and upper middle of the outer side of the blowing pipe (11), a rotating shaft (20) is rotatably connected between the rotating seats (17), a rotating fan frame (18) is fixedly connected to the four corners of the top and bottom of the outer side of the rotating shaft (20), and mixing blades (19) are fixedly connected between the rotating fan frames (18) at equal distances from left to right.
2. A high-efficiency ammonia synthesis catalyst reaction device according to claim 1, characterized in that: The four corners of the bottom end of the support platform (4) are all fixedly connected with supporting legs (22).
3. A high-efficiency ammonia synthesis catalyst reaction device according to claim 1, characterized in that: The four corners of the top of the support platform (4) are fixedly connected to a support frame (2), and the top of the support frame (2) is fixedly connected to a reaction platform (5).
4. A high-efficiency ammonia synthesis catalyst reaction device according to claim 1, characterized in that: A nitrogen pipe (14) is fixedly connected to the rear side of the top of the left end of the outside of the reaction tank (1), a hydrogen pipe (15) is fixedly connected to the front side of the top of the left end of the outside of the reaction tank (1), and an ammonia pipe (16) is fixedly connected to the front side of the bottom of the right end of the outside of the reaction tank (1).
5. The high-efficiency ammonia synthesis catalyst reaction device according to claim 1, characterized in that: A reduction feed pipe (21) is fixedly connected to the left side of the bottom end of the reduction tank (3).
6. The high-efficiency ammonia synthesis catalyst reaction device according to claim 1, characterized in that: The upper middle portion and four middle corners of the outer side of the blowing pipe (11) are fixedly connected to a pipe body bracket (12).
7. The high-efficiency ammonia synthesis catalyst reaction device according to claim 1, characterized in that: A catalytic feed pipe (6) is fixedly connected to the left side of the top end of the reduction tank (3), and a feed cover (7) is provided at the top end of the catalytic feed pipe (6).