Alumina bed for hydrogen peroxide production

Abstract

The utility model discloses an aluminum oxide bed for hydrogen peroxide production, which comprises a barrel, an upper section aluminum oxide bed layer and a lower section aluminum oxide bed layer are sequentially arranged in the middle of the barrel from top to bottom, the interval between the upper section aluminum oxide bed layer and the lower section aluminum oxide bed layer is 500mm, and a porous distribution plate is arranged between the upper section aluminum oxide bed layer and the lower section aluminum oxide bed layer. Integral aluminum oxide is arranged in the upper-section aluminum oxide bed layer and the lower-section aluminum oxide bed layer, an emptying opening is formed in the top of the cylinder body, and a drain outlet is formed in the bottom of the cylinder body. According to the aluminum oxide bed for hydrogen peroxide production, the aluminum oxide bed is divided into the upper section and the lower section, the resistance of a single-section bed layer is greatly reduced, the problem that bias flow is generated when a working solution flows through the bed layer is solved, the contact efficiency of aluminum oxide and the working solution is improved, and the porous distribution plate is designed and mounted in the aluminum oxide bed; and the working solution is subjected to secondary redistribution, so that the utilization rate of aluminum oxide is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen peroxide production technology, and in particular to an alumina bed for hydrogen peroxide production. Background Technology

[0002] The anthraquinone process for producing hydrogen peroxide generally includes hydrogenation, oxidation, extraction and purification, post-treatment, and other auxiliary processes. Due to the unique cyclical nature of the working fluid system in the anthraquinone process, some anthraquinone degradation products are generated during the reaction. Therefore, regenerating the working fluid is essentially reducing these degradation products, which is crucial for stable hydrogen peroxide production. Currently, the working fluid regeneration in the anthraquinone process primarily utilizes activated alumina. The hydrogen peroxide unit is equipped with both a hydrogenation process regeneration alumina bed and a post-treatment regeneration alumina bed.

[0003] Currently, the existing alumina bed structure is a single-section alumina bed, which generally has the following problems: First, the bed cross-sectional area is large, the alumina layer is high, the bed resistance is large, the working fluid will flow off course in the alumina layer, and the alumina utilization rate is low. Utility Model Content

[0004] The purpose of this invention is to provide an alumina bed for hydrogen peroxide production. The alumina bed is set up in two sections, which greatly reduces the resistance of a single section of the bed and solves the problem of flow deviation of the working fluid when it flows through the bed. This improves the contact efficiency between alumina and the working fluid. A porous distribution plate is designed and installed inside the alumina bed to redistribute the working fluid, which greatly improves the utilization rate of alumina.

[0005] To achieve the above objectives, this utility model provides an alumina bed for hydrogen peroxide production, comprising a cylinder, with an upper alumina bed and a lower alumina bed arranged sequentially from top to bottom in the middle of the cylinder, with a 500mm interval between the upper and lower alumina bed, and a porous distribution plate arranged between the upper and lower alumina bed, and integral alumina in both the upper and lower alumina bed, with a vent at the top of the cylinder and a drain outlet at the bottom of the cylinder.

[0006] Preferably, a steam / air inlet distributor is provided above the upper alumina bed, and a working fluid outlet distributor is provided above the steam / air inlet distributor.

[0007] Preferably, a working fluid inlet distributor is provided below the lower section of the alumina bed.

[0008] Preferably, the porous distribution plate is located in the interval between the upper alumina bed and the lower alumina bed, and is spaced apart from both the upper and lower alumina beds respectively.

[0009] Preferably, the surface of the porous distribution plate is covered with stainless steel wire mesh.

[0010] Preferably, the monolithic alumina is a honeycomb monolithic alumina, with the channel shape being square or triangular and the hole size being 0.5 to 5 mm.

[0011] Therefore, this utility model adopts the above-mentioned alumina bed for hydrogen peroxide production, which is set into upper and lower sections. The resistance of a single section bed is greatly reduced, which solves the problem of the working fluid flowing through the bed and improves the contact efficiency between alumina and working fluid. A porous distribution plate is designed and installed inside the alumina bed to redistribute the working fluid, which greatly improves the utilization rate of alumina.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an alumina bed for hydrogen peroxide production according to this utility model;

[0014] Figure 2 This is a top view of a honeycomb-shaped integral alumina bed with triangular channels in hydrogen peroxide production according to this utility model.

[0015] Figure 3 This is a top view of a honeycomb-shaped integral alumina bed with square channels for hydrogen peroxide production according to this utility model.

[0016] 1. Working fluid inlet distributor; 2. Lower alumina bed; 3. Upper alumina bed; 4. Working fluid outlet distributor; 5. Vent port; 6. Drain port; 7. Perforated distribution plate; 8. Steam / air inlet distributor; 9. Cylinder. Detailed Implementation

[0017] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] Example 1

[0020] like Figure 1 As shown, an alumina bed for hydrogen peroxide production includes a cylindrical body 9. From top to bottom, an upper alumina bed 3 and a lower alumina bed 2 are sequentially arranged in the middle of the cylindrical body 9, with a 500mm interval between the upper alumina bed 3 and the lower alumina bed 2. Due to the segmented design of the alumina bed, the resistance of each segment is significantly reduced, solving the problem of flow deviation of the working fluid as it flows through the bed and improving the contact efficiency between the alumina and the working fluid.

[0021] A porous distribution plate 7 is installed between the upper alumina bed 3 and the lower alumina bed 2. The porous distribution plate 7 is located within the gap between the upper alumina bed 3 and the lower alumina bed 2, maintaining a distance from both beds to facilitate gas distribution. The porous distribution plate 7, designed and installed inside the alumina bed, allows for secondary redistribution of the working fluid, significantly improving the utilization rate of alumina. The surface of the porous distribution plate 7 is covered with stainless steel wire mesh to prevent solid impurities such as alumina from entering and clogging the gas distribution holes.

[0022] Both the upper alumina bed 3 and the lower alumina bed 2 contain integral alumina, which is honeycomb-shaped with square or triangular channels (e.g., Figure 2 and Figure 3 As shown in the figure, the pore size is 0.5–5 mm. The honeycomb monolithic alumina bed is a regular stacking of block alumina. The overall diameter of the block alumina is close to the inner diameter of the cylinder, eliminating mutual wear and preventing the generation of secondary dust. The honeycomb monolithic alumina has simple fluid channels, low resistance throughout the bed, and no fluid short circuits or dead zones.

[0023] The top of the cylinder 9 is equipped with a vent 5, and the bottom of the cylinder 9 is equipped with a drain 6. A steam / air inlet distributor 8 is installed above the upper alumina bed 3 to ensure uniform steam / air distribution within different areas of the bed during alumina regeneration, thereby improving steam / air blowing efficiency and achieving more thorough working fluid recovery. A working fluid outlet distributor 4 is installed above the steam / air inlet distributor 8. A working fluid inlet distributor 1 is installed below the lower alumina bed 2.

[0024] In use, the working fluid enters the lower alumina bed 2 through the working fluid inlet distributor 1. As the working fluid level increases, it enters the gap between the upper alumina bed 3 and the lower alumina bed 2, and is then dispersed by the porous distribution plate 7 into the upper alumina bed 3. Finally, it is discharged through the working fluid outlet distributor 4. Waste liquid generated from the reaction between the working fluid and the alumina bed is discharged through the drain outlet 6.

[0025] Therefore, this utility model adopts the above-mentioned alumina bed for hydrogen peroxide production, which is set into upper and lower sections. The resistance of a single section bed is greatly reduced, which solves the problem of the working fluid flowing through the bed and improves the contact efficiency between alumina and working fluid. A porous distribution plate is designed and installed inside the alumina bed to redistribute the working fluid, which greatly improves the utilization rate of alumina.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. An alumina bed for hydrogen peroxide production, characterized in that: The device includes a cylinder, in which an upper alumina bed and a lower alumina bed are arranged sequentially from top to bottom in the middle section of the cylinder. The upper and lower alumina beds are spaced 500mm apart, and a porous distribution plate is provided between the upper and lower alumina beds. Both the upper and lower alumina beds contain integral alumina. The top of the cylinder has a vent, and the bottom of the cylinder has a drain outlet.

2. The alumina bed for hydrogen peroxide production according to claim 1, characterized in that: A steam / air inlet distributor is provided above the upper section of the alumina bed, and a working fluid outlet distributor is provided above the steam / air inlet distributor.

3. The alumina bed for hydrogen peroxide production according to claim 1, characterized in that: A working fluid inlet distributor is provided below the lower section of the alumina bed.

4. The alumina bed for hydrogen peroxide production according to claim 1, characterized in that: The porous distribution plate is located in the gap between the upper alumina bed and the lower alumina bed, and is spaced apart from the upper alumina bed and the lower alumina bed, respectively.

5. An alumina bed for hydrogen peroxide production according to claim 1, characterized in that: The surface of the porous distribution plate is covered with stainless steel wire mesh.

6. An alumina bed for hydrogen peroxide production according to claim 1, characterized in that: The monolithic alumina is a honeycomb monolithic alumina, with square or triangular pores and a pore size of 0.5–5 mm.

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