Hydrogen peroxide fixed bed hydrogenation tower for enhancing material distribution
By setting a radial distributor at the bottom of the catalyst bed and using concentric cylinders and baffles to separate the catalyst bed, the problem of uneven catalyst bed distribution was solved, resulting in a more stable reaction and lower raw material consumption.
Patent Information
- Application Number
- CN202423280548.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing hydrogen peroxide production plants, problems such as wall flow, channel flow, and deflection caused by uneven catalyst bed distribution affect catalyst activity and stable plant operation.
A radial distributor, consisting of concentric cylinders and baffles, is installed at the bottom of the catalyst bed. The baffles divide the catalyst bed into independent reaction zones, enhancing material distribution and preventing wall flow and deviation caused by uneven distribution.
This effectively reduces the impact of uneven distribution, fully utilizes catalyst performance, reduces raw material consumption, minimizes reaction byproducts, and ensures stable operation of the unit.
Smart Images
Figure CN223697687U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to hydrogen peroxide production field, concretely relates to a hydrogen peroxide fixed bed hydrogenation tower of material distribution reinforcement. BACKGROUND
[0002] At present, most of domestic hydrogen peroxide production devices adopt anthraquinone method fixed bed process, all adopt anthraquinone as carrier, and several of C9~C10 heavy aromatic hydrocarbon, trioctyl phosphate, ortho-methylcyclohexyl acetate, tetrabutyl urea are used as solvent to prepare working fluid, and industrial grade hydrogen peroxide product is obtained through hydrogenation, oxidation, extraction, purification and other processes.
[0003] The anthraquinone method fixed bed production of hydrogen peroxide is a typical gas-liquid-solid three-phase reaction, specifically, working fluid and hydrogen gas are mixed under certain temperature and pressure, and then flow through catalyst bed layer, and hydrogenation reaction occurs on the surface of catalyst. Because of high catalyst bed layer or unreasonable reactor design, uneven distribution such as wall flow, channel flow and bias flow occurs in many manufacturers, which causes catalyst activity to decrease, and deep hydrogenation product to rise, thereby greatly affecting stable operation of the device. SUMMARY
[0004] In view of the above problems, the utility model provides a hydrogen peroxide fixed bed hydrogenation tower of material distribution reinforcement, which comprises a radial distributor and a catalyst bed layer;The catalyst bed layer is located in the inside of the hydrogenation tower main body, and the radial distributor is arranged in the catalyst bed layer;The radial distributor comprises at least two concentric cylinders with different diameters and baffles;The adjacent cylinders are connected through the baffles;The outermost cylinder is an outer cylinder, and the innermost cylinder is an inner cylinder, and the outer cylinder and the inner wall of the hydrogenation tower are connected through the baffles.
[0005] Each two adjacent cylinders are uniformly provided with m1 baffles, and m1 is 3~8;The height of the baffle and the cylinder is consistent.
[0006] The outer cylinder and the inner wall of the hydrogenation tower are uniformly provided with m2 baffles, and m2 is 3~8.
[0007] The radial distributor is arranged at the bottom of the catalyst bed layer 6, and the height accounts for 1 / 3~1 of the total bed height of the catalyst bed layer.
[0008] Preferably, the baffles on the inner side and the outer side of the same cylinder are staggered.
[0009] The utility model has the beneficial effects as follows:
[0010] The utility model provides a kind of hydrogen peroxide fixed bed hydrogenation tower of reinforced material distribution, catalyst bed layer below increases radial distributor, separation is separated between cylinder and tower wall by baffle, each baffle is evenly distributed according to certain angle, ensure that each sealing area belongs to independent system, constrain working fluid in fixed range, the effect of gas-liquid distribution in fixed bed is reinforced, wall flow, bias flow influence caused by uneven distribution is greatly reduced, the performance of catalyst is fully played, raw material consumption is reduced, the generation of reaction byproduct is reduced, while ensuring system device stable operation. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 The utility model top schematic diagram;
[0012] Figure 2 The utility model front schematic diagram;
[0013] Marked in the figure: 1, hydrogenation tower inner wall, 2, outer cylinder, 3, inner cylinder, 4, baffle, 5, hydrogenation tower main body, 6, catalyst bed layer, 7, radial distributor. DETAILED DESCRIPTION
[0014] The embodiment of the utility model will be described in detail in combination with example, the following examples are only used for explaining the utility model, and should not be regarded as limiting the scope of the utility model.
[0015] Example 1
[0016] As shown in the figure, a kind of hydrogen peroxide fixed bed hydrogenation tower of reinforced material distribution, include radial distributor 7 and catalyst bed layer 6;The catalyst bed layer 6 is located in the inside of hydrogenation tower main body 5, radial distributor 7 is placed in catalyst bed layer 6;The radial distributor 7 includes at least two concentric cylinders of different diameters and baffle 4;Adjacent cylinder is connected by baffle 4;The outermost cylinder is outer cylinder 2, the innermost cylinder is inner cylinder 3, and outer cylinder 2 is connected with hydrogenation tower inner wall 1 by baffle 4.
[0017] Adjacent two cylinders are evenly provided with m1 baffle 4, and m1 is 3-8;The height of baffle 4 and cylinder is consistent.
[0018] Outer cylinder 2 and hydrogenation tower inner wall 1 are evenly provided with m2 baffle 4, and m2 is 3-8.
[0019] The radial distributor 7 is arranged at the bottom of the catalyst bed layer 6, and the height accounts for 1 / 3-1 of the total bed height of the catalyst bed layer 6.
[0020] Example 2
[0021] The utility model working principle is as follows:
[0022] AdoptFigure 1 The device of the application sets two cylinders (an outer cylinder 2 and an inner cylinder 3), the included angle between two adjacent baffles 4 is 60°, the inner layer baffles are staggered with the outer layer baffles; the height of the radial distributor 7 accounts for 2 / 3 of the total bed height of the catalyst bed 6. First, the working liquid and hydrogen are mixed together and then flow through the catalyst bed 6 under certain temperature and pressure conditions, the baffles 4 and the cylinder of the radial distributor 7 divide the catalyst into several independent reaction zones, the working liquid is constrained in a fixed range, and the gas-liquid-solid three phases complete the reaction in the independent space and then flow out of the reactor. Even if there is a slight uneven distribution of gas-liquid, it will only affect the catalyst reaction in a certain area, and will not cause the activity of the catalyst in the whole bed to decrease.
[0023] The hydrogenation tower device for originally producing 150,000 tons (27.5%) of hydrogen peroxide per year is reformed according to the structure of the application, the consumption of raw material 2-ethylanthraquinone is less than 0.32 kg / t, which is obviously improved compared with the previous 0.5 kg / t.
Claims
1. A hydrogen peroxide fixed bed hydrogenation column for enhanced material distribution, characterized in that, The application relates to a hydrogenation tower, which comprises a radial distributor (7) and a catalyst bed (6); the catalyst bed (6) is located in the interior of a hydrogenation tower body (5), the radial distributor (7) is arranged in the catalyst bed (6); the radial distributor (7) comprises at least two concentric cylinders with different diameters and baffles (4); the adjacent cylinders are connected through the baffles (4); the outermost cylinder is an outer cylinder (2), the innermost cylinder is an inner cylinder (3), and the outer cylinder (2) is connected with the inner wall (1) of the hydrogenation tower through the baffles (4).
2. The hydrogen peroxide fixed bed hydrogenation column for enhanced material distribution of claim 1, wherein, m1 pieces of baffles (4) are evenly arranged between every two adjacent cylinders, and m1 is 3-8; the height of the baffle (4) is consistent with the height of the cylinder.
3. The hydrogen peroxide fixed bed hydrogenation column for enhanced material distribution of claim 2, wherein, m2 pieces of baffles (4) are evenly arranged between the outer cylinder (2) and the inner wall (1) of the hydrogenation tower, and m2 is 3-8.
4. The hydrogen peroxide fixed bed hydrogenation column for enhanced material distribution of claim 3, wherein, The radial distributor (7) is arranged at the bottom of the catalyst bed (6) and accounts for 1 / 3-1 of the total bed height of the catalyst bed (6).