Anthraquinone method hydrogen peroxide reaction device

Abstract

The utility model relates to hydrogen peroxide production technical field, specifically disclose a anthraquinone method hydrogen peroxide reaction unit, including oxidizing reactor, the both sides of oxidizing reactor inner chamber are fixedly arranged with fixed plate no.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen peroxide production technology, and specifically discloses an anthraquinone method hydrogen peroxide reaction apparatus. Background Technology

[0002] Hydrogen peroxide, as an important chemical raw material, is widely used in industry, medicine, and environmental remediation. The anthraquinone process is currently the most commonly used method for producing hydrogen peroxide in industry. Its principle is to dissolve anthraquinone derivatives in a suitable organic solvent to prepare a working solution. Under the action of a catalyst, anthraquinone is hydrogenated and reduced with hydrogen to produce hydrogen anthraquinone. Hydrogen anthraquinone is then oxidized by air or oxygen to obtain hydrogen peroxide. At the same time, hydrogen anthraquinone is oxidized to anthraquinone. Finally, hydrogen peroxide in the working solution is extracted with water, and an aqueous solution of hydrogen peroxide is obtained after separation. However, in the oxidation reaction stage of the anthraquinone process for producing hydrogen peroxide in the existing technology, the contact between air or oxygen and the hydrogenation liquid is insufficient, resulting in incomplete oxidation reaction and affecting the yield of hydrogen peroxide. In addition, the reaction equipment in the existing technology has a complex structure, a large footprint, high energy consumption, and high production cost. Utility Model Content

[0003] In view of the shortcomings of the prior art, the present invention provides an anthraquinone hydrogen peroxide reaction device, which optimizes the equipment structure and reaction process, and improves the gas-liquid mixing efficiency and reaction sufficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is: The anthraquinone hydrogen peroxide reaction apparatus includes an oxidation reactor. A first fixed plate and a second fixed plate are fixedly installed on both sides of the inner cavity of the oxidation reactor. Several partition plates are fixedly installed at intervals at the top and bottom of the inner cavity of the oxidation reactor. These partition plates are staggered and have different spacing. All partition plates are located between the first fixed plate and the second fixed plate. A Venturi injector and a gas-liquid separator are connected to both sides of the top of the oxidation reactor. The Venturi injector connects the first fixed plate to the partition plate near the first fixed plate, and the gas-liquid separator connects the second fixed plate to the partition plate near the second fixed plate. A liquid inlet pipe is connected to the top of the Venturi injector, and an air inlet pipe is connected to one side of the Venturi injector.

[0005] Furthermore, fixed plate one, fixed plate two, and several partition plates form several interconnected oxidation channels with different widths. The Venturi injector is connected to the oxidation channel near fixed plate one, and the gas-liquid separator is connected to the oxidation channel near fixed plate two.

[0006] Furthermore, a buffer zone is provided between the inner wall of the oxidation reactor near the fixed plate and the fixed plate, and an air inlet pipe is connected to the side of the oxidation reactor near the fixed plate, and the air inlet pipe is connected to the buffer zone.

[0007] Furthermore, a number of through holes are evenly and intermittently opened on the fixed plate and several partition plates, and an air inlet pipe is fixedly installed in each of the several through holes.

[0008] Furthermore, several intake pipes are connected to the buffer zone, and the ends of several intake pipes away from the buffer zone are fixedly connected to the fixed plate.

[0009] Furthermore, the outer surface of the intake pipe three is fitted with several oxidation channels and several through holes two are evenly spaced along the circumference, and the several through holes two are connected to the several oxidation channels.

[0010] Furthermore, a hydrophobic porous membrane is fixedly installed inside each of the several through holes.

[0011] Furthermore, a drain pipe is connected to the bottom of the oxidation reactor near the second fixed plate, and the drain pipe is connected to the oxidation channel near the second fixed plate.

[0012] Furthermore, several samplers are spaced apart at the bottom of the oxidation reactor.

[0013] Furthermore, the end of the inlet pipe away from the Venturi injector is connected to a hydrogenation reactor, and the top of the gas-liquid separator is connected to an exhaust pipe.

[0014] The beneficial effects of this utility model are: This invention utilizes a Venturi injector to automatically draw in purified oxygen or air using the negative pressure created by its internal flow field, eliminating the need for an additional gas delivery pump, thus reducing power consumption. It also allows for preliminary mixing of the hydrogenated liquid and gas within the Venturi injector, providing the necessary contact conditions for the oxidation reaction. The staggered arrangement of several partition plates with varying spacing allows for adjustment of the flow rate of the gas-liquid mixture; a narrower spacing results in a faster flow rate, while a wider spacing results in a slower flow rate. This velocity difference enhances the turbulence and contact frequency between the gas and liquid, solving the problems of gas-liquid stratification and insufficient contact in existing equipment, and enabling a deeper oxidation reaction. The gas-liquid separator allows the separated reaction liquid to be directly transported to the subsequent water extraction process, while the separated unreacted gas can be processed and recycled back into the reaction system, reducing gas loss. This invention integrates all functions, reducing the number of dispersed devices and connecting pipelines, significantly simplifying the overall structure, making the device layout more compact, significantly reducing the floor space required, and simultaneously reducing equipment procurement and installation costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the partition plate and the through hole of this utility model; Figure 3 This is a schematic diagram of the structure of the intake pipe three and the through hole two of this utility model.

[0016] In the diagram: 1. Oxidation reactor; 2. Fixed plate one; 3. Fixed plate two; 4. Divider plate; 5. Venturi ejector; 6. Gas-liquid separator; 7. Liquid inlet pipe; 8. Buffer zone; 9. Gas inlet pipe two; 10. Gas inlet pipe three; 11. Liquid outlet pipe; 12. Sampler; 13. Hydrogenation reactor; 14. Exhaust pipe; 15. Through hole one; 16. Through hole two; 17. Gas inlet pipe one. Detailed Implementation

[0017] The present invention will now be described and explained in detail with reference to the accompanying drawings.

[0018] Example 1 like Figure 1-3 As shown, the anthraquinone hydrogen peroxide reaction apparatus includes an oxidation reactor 1. A first fixed plate 2 and a second fixed plate 3 are fixedly installed on both sides of the inner cavity of the oxidation reactor 1. Several partition plates 4 are fixedly installed at intervals at the top and bottom of the inner cavity of the oxidation reactor 1. The partition plates 4 are staggered, and the spacing between the partition plates 4 is different. The partition plates 4 are all located between the first fixed plate 2 and the second fixed plate 3. A Venturi injector 5 and a gas-liquid separator 6 are connected to both sides of the top of the oxidation reactor 1. The Venturi injector 5 connects to the first fixed plate 2 and the partition plate 4 near the first fixed plate 2. The gas-liquid separator 6 connects to the second fixed plate 3 and the partition plate 4 near the second fixed plate 3. A liquid inlet pipe 7 is connected to the top of the Venturi injector 5, and an air inlet pipe 17 is connected to one side of the Venturi injector 5.

[0019] Fixed plate 1 2, fixed plate 2 3 and several partition plates 4 form several interconnected oxidation channels with different widths. Venturi injector 5 is connected to the oxidation channel near fixed plate 1 2, and gas-liquid separator 6 is connected to the oxidation channel near fixed plate 2 3.

[0020] With the above setup, the hydrogenated anthraquinone discharged from the hydrogenation reactor 13 directly enters the Venturi ejector 5. Utilizing the negative pressure formed by the internal flow field of the Venturi ejector 5, purified oxygen or air is automatically drawn in through the air inlet pipe 17. This allows the hydrogenated liquid and gas to undergo preliminary mixing within the Venturi ejector 5, providing basic contact conditions for the oxidation reaction. The preliminarily mixed gas-liquid mixture then enters the oxidation reactor 1. The interior of the oxidation reactor 1 is divided into several interconnected oxidation channels of varying widths by fixed plates 2, 3, and several partition plates 4. By changing the width of the oxidation channels, the flow rate of the gas-liquid mixture is adjusted. A narrower spacing results in a faster flow rate, while a wider spacing results in a slower flow rate. This velocity difference enhances the disturbance and contact frequency between the gas and liquid, solving the problems of gas-liquid stratification and insufficient contact in existing equipment, and enabling a deeper oxidation reaction.

[0021] A buffer zone 8 is provided between the inner wall of the oxidation reactor 1 and the fixed plate 2. An air inlet pipe 9 is connected to the side of the oxidation reactor 1 near the fixed plate 2, and the air inlet pipe 9 and the buffer zone 8 are connected.

[0022] The fixed plate 2 and the partition plates 4 are provided with several through holes 15 evenly and at intervals, and each through hole 15 is fixedly provided with an air inlet pipe 10.

[0023] Several intake pipes 310 are connected to the buffer zone 8, and the ends of several intake pipes 310 away from the buffer zone 8 are fixedly connected to the fixed plate 23.

[0024] The outer surface of the intake pipe 10 is fitted with several oxidation channels and has several through holes 16 evenly spaced along the circumference. The through holes 16 are connected to the oxidation channels.

[0025] A hydrophobic porous membrane is fixedly installed in each of the several through holes 16.

[0026] Several samplers 12 are spaced apart at the bottom of the oxidation reactor 1.

[0027] With the above setup, by periodically setting several samplers 12 at the bottom of the oxidation reactor 1, the conversion rate of hydrogen anthraquinone and the amount of hydrogen peroxide generated in the reaction liquid are sampled and detected in real time. The degree of oxidation reaction can be judged in real time, and the amount of oxygen or air introduced can be precisely adjusted accordingly to avoid excessive waste or insufficient gas leading to incomplete reaction. In use, oxygen or air enters the buffer zone through the second air inlet pipe 9, and then enters several third air inlet pipes 10 evenly. Then, it enters several oxidation channels through several through holes 16 to participate in the oxidation reaction, ensuring the oxygen concentration required for the reaction.

[0028] A drain pipe 11 is connected to the bottom of the oxidation reactor 1 near the fixed plate 2 3. The drain pipe 11 is connected to the oxidation channel near the fixed plate 2 3.

[0029] The end of the inlet pipe 7 away from the Venturi injector 5 is connected to the hydrogenation reactor 13, and the top of the gas-liquid separator 6 is connected to the exhaust pipe 14.

[0030] With the above setup, the mixed system containing the reaction liquid and a small amount of unreacted gas after the oxidation reaction enters the gas-liquid separator 6. The reaction liquid separated by the gas-liquid separator 6 is transported to the subsequent water extraction process through the drain pipe 11, while the unreacted gas obtained can be recycled back into the reaction system after processing, reducing gas loss.

[0031] In summary, this utility model achieves breakthroughs in core dimensions such as increased productivity, cost control, and reduced energy consumption through structural optimization and process innovation. Specific advantages are as follows: Improved hydrogen peroxide yield and reduced raw material waste: Solved the core pain point of incomplete oxidation reaction in traditional processes: Through the negative pressure suction and preliminary mixing of Venturi injector 5 and the enhanced disturbance of the variable diameter channel of oxidation reactor 1, the gas-liquid contact area and uniformity are improved, which greatly reduces the phenomenon of insufficient oxidation of hydrogen anthraquinone and significantly improves the hydrogen peroxide production efficiency; Dynamic control ensures reaction efficiency: Through real-time detection of sampler 12 and precise adjustment of oxygen flow, reaction stagnation due to insufficient gas supply or ineffective consumption due to excessive gas is avoided, further ensuring that the reaction is always in a high-efficiency state.

[0032] Simplifying equipment structure and reducing floor space and construction costs: Traditional equipment requires separate gas delivery pumps, mixing tanks, oxygenation devices, and other dispersed components, resulting in complex structures and cumbersome connections. This utility model integrates gas-liquid mixing, deep reaction, monitoring, and gas-liquid separation into a single system, reducing the number of dispersed devices and connecting pipelines, significantly simplifying the overall structure. Furthermore, the integrated design allows for a more compact device layout, significantly reducing the floor space required, making it particularly suitable for small and medium-sized production sites. It also reduces equipment procurement and installation costs.

[0033] Reduce energy consumption and operating costs, and improve economic efficiency: The Venturi injector 5 uses the negative pressure formed by the flow of hydrogenated liquid to draw in gas, eliminating the need for an additional gas delivery pump and reducing power consumption; and unreacted gas can be recovered and recycled through the gas-liquid separator 6, reducing the consumption of oxygen or air raw materials and reducing waste.

[0034] Enhanced process stability and controllability: Through several interconnected oxidation channels of different widths, gas-liquid mixing can be made more uniform, avoiding reaction fluctuations caused by local gas excess or liquid excess or gas deficiency in traditional devices; the real-time monitoring and parameter adjustment function of the sampler 12 can quickly respond to interference factors such as changes in raw material concentration and external temperature fluctuations, ensuring the stable progress of the oxidation reaction and reducing product quality fluctuations caused by reaction instability.

[0035] Working principle and process: Preliminary gas-liquid mixing: After being discharged from the hydrogenation reactor 13, the hydrogenated anthraquinone directly enters the Venturi injector 5. A negative pressure is formed in the Venturi injector 5, which automatically draws in the purified oxygen or air through the air inlet pipe 17 into the Venturi injector 5, so that the hydrogenated liquid and gas are initially mixed in the Venturi injector 5, providing basic contact conditions for the oxidation reaction. Deep oxidation reaction: The gas-liquid mixture after preliminary mixing enters the oxidation reactor 1 for oxygen replenishment. The interior of the oxidation reactor 1 is divided into several interconnected oxidation channels with different widths by fixed plate 1 2, fixed plate 2 3 and several partition plates 4. By changing the width of the oxidation channels, the flow rate of the gas-liquid mixture is adjusted. When the spacing is narrow, the flow rate is fast, and when the spacing is wide, the flow rate is slow. The difference in flow rate is used to enhance the disturbance and contact frequency between gas and liquid, so that the gas-liquid mixture is more uniform and the reaction is more complete. Dynamic control of the reaction process: Several samplers 12 are set at intervals at the bottom of the oxidation reactor 1. By periodically sampling and detecting indicators such as the conversion rate of hydrogen anthraquinone and the amount of hydrogen peroxide generated in the reaction solution, the degree of oxidation reaction can be judged in real time, and the oxygen supply can be adjusted accordingly. Gas-liquid separation and gas circulation: The mixed system containing the reaction liquid and a small amount of unreacted gas after the oxidation reaction enters the gas-liquid separator 6. The reaction liquid separated by the gas-liquid separator 6 is transported to the subsequent water extraction process through the drain pipe 11, while the unreacted gas obtained can be recycled back into the reaction system after treatment, reducing gas loss.

Claims

1. An anthraquinone hydrogen peroxide reaction apparatus, comprising an oxidation reactor (1), characterized in that, Fixed plates 1 (2) and 2 (3) are fixedly installed on both sides of the inner cavity of the oxidation reactor (1). Several partition plates (4) are fixedly installed at intervals at the top and bottom of the inner cavity of the oxidation reactor (1). The partition plates (4) are staggered and the spacing between the partition plates (4) is different. The partition plates (4) are located between fixed plates 1 (2) and 2 (3). Venturi ejectors (5) and gas-liquid separators (6) are connected to both sides of the top of the oxidation reactor (1). Venturi ejectors (5) connect fixed plates 1 (2) and the partition plates (4) near fixed plates 1 (2). Gas-liquid separators (6) connect fixed plates 2 (3) and the partition plates (4) near fixed plates 2 (3). The top of the Venturi ejector (5) is connected to the liquid inlet pipe (7). The side of the Venturi ejector (5) is connected to the gas inlet pipe 1 (17).

2. The anthraquinone hydrogen peroxide reaction apparatus according to claim 1, characterized in that, Fixed plate 1 (2), fixed plate 2 (3) and several partition plates (4) form several interconnected oxidation channels with different widths. Venturi injector (5) is connected to the oxidation channel near fixed plate 1 (2), and gas-liquid separator (6) is connected to the oxidation channel near fixed plate 2 (3).

3. The anthraquinone hydrogen peroxide reaction apparatus according to claim 2, characterized in that, A buffer zone (8) is provided between the inner wall of the oxidation reactor (1) near the fixed plate (2) and the fixed plate (2). An air inlet pipe (9) is connected to the side of the oxidation reactor (1) near the fixed plate (2). The air inlet pipe (9) and the buffer zone (8) are connected.

4. The anthraquinone hydrogen peroxide reaction apparatus according to claim 3, characterized in that, Several through holes (15) are evenly and intermittently opened on the fixed plate (2) and several partition plates (4), and an air inlet pipe (10) is fixedly installed in each of the several through holes (15).

5. The anthraquinone hydrogen peroxide reaction apparatus according to claim 4, characterized in that, Several intake pipes (10) are connected to the buffer zone (8), and the ends of several intake pipes (10) away from the buffer zone (8) are fixedly connected to the fixed plate (3).

6. The anthraquinone hydrogen peroxide reaction apparatus according to claim 4, characterized in that, The outer surface of the intake pipe three (10) is fitted with several oxidation channels and several through holes two (16) are evenly spaced along the circumference. The several through holes two (16) are connected to the several oxidation channels respectively.

7. The anthraquinone hydrogen peroxide reaction apparatus according to claim 6, characterized in that, Several through holes (16) are fitted with hydrophobic porous membranes.

8. The anthraquinone hydrogen peroxide reaction apparatus according to claim 2, characterized in that, The bottom end of the oxidation reactor (1) is connected to a drain pipe (11) near the fixed plate (3), and the drain pipe (11) is connected to the oxidation channel near the fixed plate (3).

9. The anthraquinone hydrogen peroxide reaction apparatus according to claim 1, characterized in that, Several samplers (12) are spaced apart at the bottom of the oxidation reactor (1).

10. The anthraquinone hydrogen peroxide reaction apparatus according to claim 1, characterized in that, The end of the inlet pipe (7) away from the Venturi ejector (5) is connected to the hydrogenation reactor (13), and the top of the gas-liquid separator (6) is connected to the exhaust pipe (14).

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