hydrogen peroxide production equipment

Abstract

This utility model belongs to the field of chemical production technology, specifically relating to a hydrogen peroxide production device. It includes a tower body, with a mixing distributor at the top, comprising an upper mixing channel and a lower distribution channel. A liquid inlet pipe and a gas inlet pipe are connected to the mixing channel, with the liquid inlet pipe located above the gas inlet pipe. Dispersion plates and packed beds are spaced apart in the middle of the tower body, arranged alternately. A separation net is located at the bottom of the tower body, with a flow divider plate on the inner wall above the separation net. A hydrogen pipe is located at the bottom of the tower body, connected to a condenser. A circulation pipe is located at the bottom of the tower body, connected to the liquid inlet pipe. This utility model achieves gas-liquid mixing and separation, improving reaction efficiency and effectively preparing hydrogen peroxide.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production technology, and specifically relates to a hydrogen peroxide production device. Background Technology

[0002] Currently, the anthraquinone process remains the mainstream technology for producing hydrogen peroxide, with hydrogenation being the key step. The hydrogenation reactor significantly impacts reaction efficiency. Traditional hydrogenation reactors include suspended bed, fixed bed, and fluidized bed structures. Suspended beds use mechanical stirring to suspend the Ranney nickel catalyst, which can lead to high energy consumption, catalyst wear, and reduced hydrogenation efficiency. Fixed beds use palladium catalyst packed in a fixed bed within the tower, typically palladium / alumina particles supported on spherical carriers. While the equipment structure is simple and requires no stirring, adding too much catalyst at once can cause catalyst caking, uneven reaction, severe channeling and wall flow, large bed pressure drop, and localized overheating. Furthermore, the reaction liquid and hydrogen are often unevenly mixed in traditional pipelines.

[0003] Therefore, the reactors currently in use have problems such as low hydrogenation efficiency, catalyst wear, and incomplete utilization of the reaction equipment, which cannot meet the current requirements for hydrogenation reactions. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a hydrogen peroxide production device that improves the efficiency of hydrogenation reaction, increases the mixing degree of hydrogen and reaction liquid, improves the preparation efficiency of hydrogen peroxide, and promotes the separation of hydrogen peroxide and hydrogen.

[0005] The technical solution adopted by this utility model to solve its technical problem is: The hydrogen peroxide production device of this utility model includes a tower body, a mixing distributor at the top of the tower body, the mixing distributor including an upper mixing channel and a lower distribution channel, a liquid inlet pipe and an air inlet pipe connected to the mixing channel, the liquid inlet pipe being located above the air inlet pipe, a dispersion plate and a packing distribution bed arranged at intervals in the middle of the tower body, the dispersion plate and the packing distribution bed being arranged alternately, a separation net at the bottom of the tower body, a flow divider plate on the inner wall of the tower body above the separation net, a hydrogen pipe at the bottom of the tower body, the hydrogen pipe being connected to a condenser, and a circulation pipe at the bottom of the tower body, the circulation pipe being connected to the liquid inlet pipe.

[0006] The mixing channel is arranged in a spiral shape inside, and the diameter of the mixing channel gradually decreases from top to bottom.

[0007] The liquid inlet pipe is equipped with an atomizing nozzle at its end.

[0008] The packing distribution bed is composed of several layers of packing mesh stacked together, and the overall structure of the packing mesh is arranged in a honeycomb shape.

[0009] The bottom of the honeycomb structure of the packing mesh is provided with a support rod, and the sides of the honeycomb structure of the packing mesh are hollowed out.

[0010] The dispersion plate is disposed between adjacent packing distribution beds.

[0011] The dispersion plate has several partition plates inside, which are arranged perpendicularly to each other.

[0012] The bottom of the tower body is equipped with a drain pipe.

[0013] The separation net has an overall open cylindrical structure, with several sieve plates spaced apart inside. The bottom of the separation net is connected to the inner wall of the tower body via an electric telescopic rod.

[0014] The diversion plate is rotatably mounted on the inner wall of the tower body via a connecting rod.

[0015] The beneficial effects of this utility model are: This invention achieves gas-liquid mixing and separation, improving reaction efficiency and effectively preparing hydrogen peroxide. It also improves hydrogen dispersion and mixing with the reaction liquid. The invention utilizes a mixing distributor to enhance hydrogen dispersion in the reaction liquid. The catalyst packing material used in this invention ensures uniform catalyst distribution, and the larger contact surface in the packing bed allows for full contact between the reaction liquid, hydrogen, and the catalyst, preventing localized overheating, reducing side reactions, minimizing catalyst caking, improving catalyst and reaction device utilization, reducing device wear and catalyst loss, and extending the lifespan of the reaction device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the hybrid distributor of this utility model; Figure 3 This is a schematic diagram of the distribution channel structure of this utility model; Figure 4 This is a schematic diagram of the hybrid channel structure of this utility model; Figure 5 This is a schematic diagram of the dispersion plate structure of this utility model; Figure 6 This is a schematic diagram of the packing mesh structure of this utility model; Figure 7 This is a schematic diagram of the structure of the packing mesh of this utility model; Figure 8 This is a schematic diagram of the sieve plate structure of this utility model; In the diagram: 1. Tower body; 2. Liquid inlet pipe; 3. Gas inlet pipe; 4. Hydrogen pipe; 5. Circulation pipe; 6. Liquid outlet pipe; 7. Mixing distributor; 8. Condenser; 9. Separation mesh; 10. Diverter plate; 101. Dispersion plate; 102. Packing distribution bed; 103. Support rod; 104. Packing mesh; 105. Divider plate; 201. Atomizing nozzle; 701. Mixing channel; 702. Distribution channel; 901. Sieve plate; 902. Electric telescopic rod; 1001. Connecting rod. Detailed Implementation

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

[0018] Example 1 like Figure 1-8 As shown, the hydrogen peroxide production device of this utility model includes a tower body 1. A mixing distributor 7 is provided on the upper part of the tower body 1. The mixing distributor 7 includes an upper mixing channel 701 and a lower distribution channel 702. A liquid inlet pipe 2 and an air inlet pipe 3 are connected to the mixing channel 701. The liquid inlet pipe 2 is located above the air inlet pipe 3. A dispersion plate 101 and a packing distribution bed 102 are arranged at intervals in the middle of the tower body 1. The dispersion plate 101 and the packing distribution bed 102 are arranged alternately. A separation net 9 is provided at the lower part of the tower body 1. A flow divider plate 10 is provided on the inner wall of the tower body 1 above the separation net 9. A hydrogen pipe 4 is provided at the lower part of the tower body 1. The hydrogen pipe 4 is connected to a condenser 8. A circulation pipe 5 is provided at the bottom of the tower body 1. The circulation pipe 5 is connected to the liquid inlet pipe 2.

[0019] The mixing channel 701 is arranged in a spiral shape inside, and the diameter of the mixing channel 701 gradually decreases from top to bottom.

[0020] An atomizing nozzle 201 is installed at the end of the liquid inlet pipe 2.

[0021] The packing distribution bed 102 is composed of several layers of packing mesh 104 stacked together, and the overall structure of the packing mesh 104 is honeycomb-shaped.

[0022] The bottom of the honeycomb structure of the packing mesh 104 is provided with support rods 103, and the sides of the honeycomb structure of the packing mesh 104 are hollowed out.

[0023] The dispersion plate 101 is disposed between adjacent packing distribution beds 102.

[0024] The dispersion plate 101 has several partition plates 105 inside, and the partition plates 105 are arranged perpendicularly to each other.

[0025] A drain pipe 6 is installed at the bottom of the tower body 1.

[0026] The separation net 9 has an overall open cylindrical structure. Several sieve plates 901 are arranged at intervals inside the separation net 9. The bottom of the separation net 9 is connected to the inner wall of the tower body 1 by an electric telescopic rod 902.

[0027] The diverter plate 10 is rotatably mounted on the inner wall of the tower body 1 via the connecting rod 1001.

[0028] Working principle and process: Hydrogen gas enters the mixing distributor 7 through the inlet pipe 3 and is then evenly distributed inside the mixing channel 701. The reaction liquid is atomized by the atomizing nozzle 201 and flows through the mixing channel 701, where it is thoroughly mixed with the hydrogen gas. The hydrogen gas forms tiny bubbles in the reaction liquid, resulting in a highly homogenized gas-liquid mixture. Catalyst particles are evenly packed in the packed distribution bed 102. The gas-liquid mixture is then evenly dispersed into the packed distribution bed 102 through the distribution channel 702, preventing the gas-liquid mixture from directly and at high speed scouring the catalyst on the packed distribution bed 102. The gas-liquid mixture can react rapidly when it flows over the catalyst surface. The high specific surface area improves the hydrogenation reaction efficiency. After the reaction, the gas-liquid mixture is further dispersed by the dispersion plate 101 and enters the next layer of the packed distribution bed 102. The reaction continues. Adjusting the connecting rod 1001 causes the diverter plate 10 to be tilted above the separation screen 9, preventing liquid from entering the separation screen 9. The hydrogen peroxide and hydrogen mixture obtained from the reaction flows down from the side of the tower body 1 under the action of the diverter plate 10 and is transported back to the mixing channel 701 through the circulation pipe 5. The hydrogen pipe 4 can discharge the free hydrogen in the tower body 1 and maintain the stable gas pressure in the tower body 1. When the hydrogen peroxide concentration reaches the required level, adjust the connecting rod 1001 to make the diverter plate 10 vertical. The hydrogen peroxide and hydrogen mixture enters the separation screen 9. The separation screen 9 is continuously vibrated under the action of the electric telescopic rod 902. The hydrogen peroxide and hydrogen mixture is separated into hydrogen under the vibration action of the separation screen 9 and the sieve plate 901. The hydrogen is discharged through the hydrogen pipe 4, and the hydrogen peroxide is discharged through the drain pipe 6 for later use.

Claims

1. A hydrogen peroxide production apparatus, comprising a tower body (1), characterized in that, A mixing distributor (7) is provided at the top of the tower body (1). The mixing distributor (7) includes an upper mixing channel (701) and a lower distribution channel (702). A liquid inlet pipe (2) and an air inlet pipe (3) are connected to the mixing channel (701). The liquid inlet pipe (2) is located above the air inlet pipe (3). A dispersion plate (101) and a packing distribution bed (102) are provided at intervals in the middle of the tower body (1). The dispersion plate (101) and the packing distribution bed (102) are arranged alternately. A separation net (9) is provided at the bottom of the tower body (1). A flow divider plate (10) is provided on the inner wall of the tower body (1) above the separation net (9). A hydrogen pipe (4) is provided at the bottom of the tower body (1). A condenser (8) is connected to the hydrogen pipe (4). A circulation pipe (5) is provided at the bottom of the tower body (1). The circulation pipe (5) is connected to the liquid inlet pipe (2).

2. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The mixing channel (701) is arranged in a spiral shape inside, and the diameter of the mixing channel (701) gradually decreases from top to bottom.

3. The hydrogen peroxide production apparatus according to claim 1, characterized in that, An atomizing nozzle (201) is provided at the end of the liquid inlet pipe (2).

4. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The packing distribution bed (102) is composed of several layers of packing mesh (104) stacked together, and the overall structure of the packing mesh (104) is honeycomb-shaped.

5. The hydrogen peroxide production apparatus according to claim 4, characterized in that, The bottom of the honeycomb structure of the packing mesh (104) is provided with a support rod (103), and the side of the honeycomb structure of the packing mesh (104) is hollowed out.

6. The hydrogen peroxide production apparatus according to claim 1, characterized in that, Dispersion plates (101) are disposed between adjacent packing distribution beds (102).

7. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The dispersion plate (101) has several partition plates (105) inside, and the partition plates (105) are arranged perpendicularly to each other.

8. The hydrogen peroxide production apparatus according to claim 1, characterized in that, A drain pipe (6) is installed at the bottom of the tower body (1).

9. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The separation net (9) has an open cylindrical structure. Several sieve plates (901) are arranged at intervals inside the separation net (9). The bottom of the separation net (9) is connected to the inner wall of the tower body (1) by an electric telescopic rod (902).

10. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The diverter plate (10) is rotatably mounted on the inner wall of the tower body (1) via the connecting rod (1001).

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