Cold hydrogen distributor for small hydrogenation reactor
By designing a cold hydrogen distributor in the hydrogenation reactor and adopting a mixing box and branch pipeline structure, the problem of uneven cold hydrogen mixing was solved, achieving uniform temperature reduction and improved safety within the reactor.
Patent Information
- Application Number
- CN202422306865.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-23
AI Technical Summary
The design of the cold hydrogen unit in the existing hydrogenation reactor has the problem of insufficient mixing between cold hydrogen and reactants, resulting in uneven cooling of the materials, which affects the subsequent reaction and poses safety hazards.
Design a cold hydrogen distributor for a small hydrogenation reactor, including a mixing box, an inlet, a bottom injection port, and branch pipes. The input pipe is connected by a threaded sleeve to achieve uniform distribution of cold hydrogen in the reactor.
It achieves uniform distribution of cold hydrogen in the reactor, improves the safety and temperature uniformity of the hydrogenation reaction, and has a simple structure and low cost.
Smart Images
Figure CN223170870U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydrogenation reactors, and more particularly to a cold hydrogen distributor for a hydrogenation reactor. Background Art
[0002] Hydrogenation reactors are crucial pieces of equipment in organic chemistry laboratories and production processes. They serve not only as vessels for hydrogenation reactions but also in situations where liquids and gases need to be thoroughly mixed. Hydrogenation reactors are often used to convert residual oil, the most difficult-to-use heavy fraction in the petroleum industry, into lighter oils, thereby producing gasoline, diesel, and other products.
[0003] Current hydrogenation reactors typically feature two or more catalyst beds. Hydrogenation is an exothermic process. To uniformly reduce the temperature within the reactor shell to meet the required reaction conditions, cold hydrogen must be injected between the beds. This cold hydrogen mixes thoroughly with the reactants and hot hydrogen in the beds, effectively lowering the temperature of the reactants. This cools the reactants before they enter the lower catalyst bed for reaction.
[0004] The cold hydrogen is mixed with the reactants in the previous bed through a hydrogen cooling unit. However, current domestically designed hydrogen cooling units suffer from insufficient mixing of the cold hydrogen and reactants and complex structures, resulting in uneven cooling of the materials. This uneven cooling can have a lasting impact on subsequent reactions, potentially leading to catalyst failure and potentially creating safety hazards.
[0005] Therefore, there is an urgent need for a cold hydrogen distributor for a small hydrogenation reactor. Utility Model Content
[0006] The technical problem to be solved by the utility model is to provide a cold hydrogen distributor for a small hydrogenation reactor to solve the problems in the background technology.
[0007] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.
[0008] A cold hydrogen distributor for a small hydrogenation reactor is arranged in the inner cavity of the reactor shell, including a cylindrical mixing box body with a mixing chamber provided therein; an air inlet is provided in the middle of the side wall of the mixing box body, and a plurality of evenly arranged bottom injection holes are provided on the bottom end surface of the mixing box body; a plurality of branch pipes extending radially in all directions are connected to the side wall of the mixing box body, and a plurality of evenly arranged branch injection holes are provided on the busbar located at the lowest end of the branch pipe; the air inlet is connected to a branch pipe, and the other end of the branch pipe is connected to a threaded sleeve; the other end of the threaded sleeve is connected to the reactor shell, and the threaded sleeve is connected to an input pipe for inputting cold hydrogen.
[0009] Further optimize the technical solution. The bottom injection holes are arranged in a circular ring, and the circle formed by the bottom injection holes is concentric with the bottom end face of the mixing box body.
[0010] Further optimize the technical solution. The number of the bottom injection holes is equal to the number of the branch pipelines, and the bottom injection holes and the adjacent branch pipelines are located on the same diameter.
[0011] Further optimize the technical solution. There are eight branch pipelines.
[0012] Further optimize the technical solution. There is a distance between the distal end of the branch pipeline and the reactor shell, and the length of the distance is 1-3 times the distance between adjacent branch injection holes.
[0013] Due to the adoption of the above technical solutions, the technical progress achieved by the present utility model is as follows.
[0014] A cold hydrogen distributor for a small hydrogenation reactor provided by the present utility model is arranged in the middle of the reactor. The gas flowing out of the cold hydrogen input pipeline is dispersed after passing through the mixing chamber in the middle and then flows to each injection branch, so that the cold hydrogen can be evenly distributed in each part, reducing the setting of other structures, enabling the temperature in the reactor to be evenly cooled, and meeting the bed reaction conditions. The present utility model can evenly add cold hydrogen into the reactor, thereby effectively improving the safety of the hydrogenation reaction, and has the advantages of simple structure, convenient use and low cost. Description of the Drawings
[0015] Figure 1 It is a schematic diagram when the present utility model is actually used;
[0016] Figure 2 It is a structural schematic diagram of the present utility model;
[0017] Wherein: 1. Mixing box body, 2. Air inlet hole, 3. Bottom injection hole, 4. Input pipeline, 5. Branch pipeline, 6. Threaded sleeve, 7. Branch injection hole, 8. Reactor shell. Detailed Description of the Embodiment
[0018] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.
[0019] A cold hydrogen distributor for a small hydrogenation reactor is arranged in the inner cavity of the reactor shell 8. Combining Figures 1 to 2 as shown, it includes a mixing box body 1, an air inlet hole 2, a bottom injection hole 3, an input pipeline 4, a branch pipeline 5, a threaded sleeve 6, a branch injection hole 7, and a reactor shell 8.
[0020] The mixing box body 1 is cylindrical, and a mixing cavity is arranged inside the mixing box body 1. An air inlet hole 2 is arranged in the middle of the side wall of the mixing box body 1, and a plurality of uniformly arranged bottom injection holes 3 are arranged on the bottom end surface of the mixing box body 1; the bottom injection holes 3 are arranged in a circular ring, and the circular ring formed by the bottom injection holes 3 is concentric with the bottom end surface of the mixing box body 1.
[0021] Eight branch pipelines 5 are communicated with the side wall of the mixing box body 1, and the branch pipelines 5 extend radially around. A plurality of uniformly arranged branch injection holes 7 are arranged on the lowest bus of the branch pipelines 5.
[0022] The number of the bottom injection holes 3 is equal to the number of the branch pipelines 5 and they are arranged correspondingly; specifically, the bottom injection hole 3 and the adjacent branch pipeline 5 are located on the same diameter.
[0023] There is a distance between the distal end of the branch pipeline 5 and the reactor shell 8, and the length of the distance is 1-3 times the distance between adjacent branch injection holes 7.
[0024] The air inlet hole 2 is communicated with a branch pipeline 5, and the other end of this branch pipeline 5 is connected with a threaded sleeve 6. The other end of the threaded sleeve 6 is connected with the reactor shell 8, and the threaded sleeve 6 is communicated with an input pipeline 4 for inputting cold hydrogen.
[0025] When the utility model is actually used, the cold hydrogen distributor is fixed in the inner cavity of the small reactor shell through the threaded sleeve on the branch pipeline, so that the bottom injection holes and the branch injection holes face downwards. The branch pipelines in the cold hydrogen distributor are arranged horizontally, and the gas coming out of the external cold hydrogen pipeline flows into the mixing cavity of the mixing box body through the threaded sleeve and the connected branch pipelines. The gas in the mixing cavity is mixed with the gas refracted back by the inner wall of the mixing box body and then flows to the branch injection holes on each branch pipeline, so that the cold hydrogen is ejected more uniformly.
Claims
1. A cold hydrogen distributor for a small hydrogenation reactor, which is arranged in the inner cavity of the reactor shell (8), and is characterized in that: It includes a mixing box body (1) in a cylindrical shape, and a mixing cavity is arranged inside the mixing box body (1); an air inlet hole (2) is arranged in the middle of the side wall of the mixing box body (1), and a plurality of uniformly arranged bottom injection holes (3) are arranged on the bottom end surface of the mixing box body (1); a plurality of branch pipelines (5) extending radially around are communicated on the side wall of the mixing box body (1), and a plurality of uniformly arranged branch injection holes (7) are arranged on the busbar at the lowest end of the branch pipeline (5); the air inlet hole (2) is communicated with a branch pipeline (5), and the other end of the branch pipeline (5) is connected with a threaded sleeve (6); the other end of the threaded sleeve (6) is connected with a reactor shell (8), and the threaded sleeve (6) is communicated with an input pipeline (4) for inputting cold hydrogen.
2. The cold hydrogen distributor for a small hydrogenation reactor according to claim 1, characterized in that: The bottom injection holes (3) are arranged in an annular shape, and the circle formed by the bottom injection holes (3) is concentric with the bottom end surface of the mixing box body (1).
3. The cold hydrogen distributor for a small hydrogenation reactor according to claim 2, characterized in that: The number of the bottom injection holes (3) is equal to the number of the branch pipelines (5), and the bottom injection holes (3) and the adjacent branch pipelines (5) are located on the same diameter.
4. A cold hydrogen distributor for a small hydrogenation reactor according to claim 3, characterized in that: Eight branch pipelines (5) are provided.
5. A cold hydrogen distributor for a small hydrogenation reactor according to claim 4, characterized in that: There is a distance between the far center end of the branch pipeline (5) and the reactor shell (8), and the length of the distance is 1-3 times the distance between adjacent branch injection holes (7).