Continuous flow hydrogen peroxide production system

Abstract

The utility model discloses a continuous flow hydrogen peroxide production system which comprises a water electrolysis hydrogen production device, a hydrogenation reaction device, a hydrogenation reaction liquid storage tank, an oxidation reaction liquid storage tank, an oxidation reaction device, an extraction device, a circulating liquid storage tank and a hydrogen peroxide storage tank, the water electrolysis hydrogen production device is used for producing hydrogen and oxygen; the hydrogenation reaction device and the hydrogenation reaction liquid storage tank are in two-way connection through a liquid pipeline, the hydrogenation reaction liquid storage tank and the oxidation reaction liquid storage tank are in one-way connection through a liquid pipeline, the oxidation reaction liquid storage tank and the oxidation reaction device are in two-way connection through a liquid pipeline, and the oxidation reaction liquid storage tank and the extraction device are in one-way connection through a liquid pipeline. The extraction device is respectively connected with the circulating liquid storage tank and the hydrogen peroxide storage tank through the liquid pipeline, the circulating liquid storage tank is connected with the hydrogenation reaction liquid storage tank through the liquid pipeline, the liquid pipeline is controlled by the conveying device, and the continuous flow hydrogen peroxide synthesis which is high in yield, strong in controllability, economical and practical can be realized.

Description

Technical Field

[0001] This utility model belongs to the technical field of production equipment, specifically relating to a continuous flow hydrogen peroxide production system. Background Technology

[0002] Hydrogen peroxide, as an important industrial raw material, is widely used in chemical production, environmental remediation, and medical and health fields. The anthraquinone process is currently the main method for producing hydrogen peroxide. Its principle involves using anthraquinone organic compounds as a carrier to react with hydrogen peroxide under certain conditions, generating hydrogen peroxide and anthraquinone compounds. Hydrogen peroxide is then separated by methods such as distillation. Specific steps include preparing a working solution (mixing anthraquinone organic compounds and a solvent), hydrogenation reaction, oxidation reaction, and extraction of hydrogen peroxide.

[0003] In hydrogen peroxide synthesis, continuous flow synthesis offers higher efficiency and better control compared to traditional batch reactions. Continuous flow reactors are advanced equipment required for process upgrades, enabling feedstock feeding and product separation under steady-state conditions. They effectively maintain constant gas-liquid flow rates and material composition, thus avoiding safety hazards caused by frequent start-ups, shutdowns, and feedstock additions. Currently, in industrial anthraquinone hydrogen peroxide production, continuous flow processes mostly employ alternating acid-base fixed beds. However, this synthesis process suffers from uneven gas-liquid mixing and severe side reactions, resulting in low hydrogen peroxide yield, poor process economy, and low product purity. Therefore, there is an urgent need to develop a precise, highly selective, and fully reactive continuous flow hydrogen peroxide production system. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a continuous flow hydrogen peroxide production system.

[0005] The technical solution of this utility model is as follows:

[0006] A continuous flow hydrogen peroxide production system includes a water electrolysis hydrogen production unit, a hydrogenation reaction unit, a hydrogenation reaction liquid storage tank, an oxidation reaction liquid storage tank, an oxidation reaction unit, an extraction unit, a circulating liquid storage tank, and a hydrogen peroxide storage tank. The water electrolysis hydrogen production unit includes a hydrogen outlet and an oxygen outlet. The hydrogen outlet is connected to the hydrogenation reaction unit, and the oxygen outlet is connected to the oxidation reaction unit. The hydrogenation reaction unit and the hydrogenation reaction liquid storage tank are bidirectionally connected via liquid pipelines. The hydrogenation reaction liquid storage tank and the oxidation reaction liquid storage tank are unidirectionally connected via liquid pipelines. The oxidation reaction liquid storage tank and the oxidation reaction unit are bidirectionally connected via liquid pipelines. The oxidation reaction liquid storage tank and the extraction unit are unidirectionally connected via liquid pipelines. The extraction unit is connected to both the circulating liquid storage tank and the hydrogen peroxide storage tank via liquid pipelines. The circulating liquid storage tank is connected to the hydrogenation reaction liquid storage tank via liquid pipelines. The liquid pipelines are controlled by a conveying device.

[0007] Optionally, the conveying device is a peristaltic pump, a centrifugal pump, a magnetic pump, etc.

[0008] Optionally, the conveying device includes a first conveying device; the first conveying device is a dual-head peristaltic pump, one pump head is used to control the reaction liquid in the lower zone of the hydrogenation reaction liquid storage tank to enter the hydrogenation reaction device and then return to the upper zone of the hydrogenation reaction liquid storage tank, and the other pump head is used to control the reaction liquid in the upper zone of the hydrogenation reaction liquid storage tank to enter the lower zone of the oxidation reaction liquid storage tank.

[0009] Optionally, the gas-liquid mixture after the reaction returns to the upper area of ​​the hydrogenation reaction liquid storage tank, which is also equipped with a waste gas discharge pipe.

[0010] Optionally, the conveying device includes a second conveying device; the second conveying device is a dual-head peristaltic pump, one pump head is used to control the reaction liquid in the lower zone of the oxidation reaction liquid storage tank to enter the oxidation reaction device and then return to the upper zone of the oxidation reaction liquid storage tank after reaction, and the other pump head is used to control the reaction liquid in the upper zone of the oxidation reaction liquid storage tank to enter the extraction device.

[0011] Optionally, the gas-liquid mixture after the reaction returns to the upper area of ​​the oxidation reaction liquid storage tank, and the oxidation reaction liquid storage tank is also equipped with a waste gas discharge pipe.

[0012] Optionally, the conveying device includes a third conveying device for controlling the reaction liquid in the circulating liquid storage tank to enter the lower zone of the hydrogenation reaction liquid storage tank.

[0013] Optionally, the extraction apparatus includes three extraction towers, with adjacent extraction towers connected by buffer tanks.

[0014] Optionally, it also includes a fixed frame having a three-layer structure, with the extraction device, circulating liquid storage tank and hydrogen peroxide storage tank placed at the bottom layer, the continuous flow oxidation reaction device, hydrogenation reaction liquid storage tank and oxidation reaction liquid storage tank placed at the middle layer, and the hydrogenation reaction device and water electrolysis hydrogen production device placed at the top layer.

[0015] Optionally, it also includes a centralized control cabinet, under which the water electrolysis hydrogen production device, extraction device and conveying device are controlled.

[0016] Optionally, the hydrogenation reactor and the oxidation reactor are respectively provided with a catalyst-supported porous layer.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. A continuous flow hydrogen peroxide production system can sustain production and achieve raw material recycling when there is sufficient raw material, thereby reducing costs;

[0019] 2. The continuous flow hydrogen peroxide production system can precisely control the amount of each feed component entering each device and maintain a certain ratio to achieve sufficient mixing and reaction. It has high hydrogen peroxide yield, high process economy, and strong controllability.

[0020] Other features and beneficial effects of this invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the continuous flow hydrogen peroxide production system in the embodiment.

[0022] Figure 2 This is a schematic diagram of the flow path of the continuous flow hydrogen peroxide production system in an embodiment.

[0023] Figure 3 This is a schematic diagram of the reaction process of the continuous flow hydrogen peroxide production system in the embodiment.

[0024] Figure 4 This is a schematic diagram of the extraction device in the embodiment;

[0025] Figure 5 This is a schematic diagram of the extraction tower structure of the extraction device in the embodiment;

[0026] Figure 6 This is a control schematic diagram of a continuous flow hydrogen peroxide production system as shown in the embodiment.

[0027] In the diagram: 1. Fixed frame, 1a. Bottom layer, 1b. Middle layer, 1c. Top layer, 2. Hydrogenation reaction device, 3. Electrolysis of water to produce hydrogen device, 31. DC power supply, 3a. Hydrogen outlet, 3b. Oxygen outlet, 4. Oxidation reaction device, 5. First double-headed peristaltic pump (first conveying device), 6. Second double-headed peristaltic pump (second conveying device), 7. Central control cabinet, 8. Hydrogenation reaction liquid storage tank, 9. Oxidation reaction liquid storage tank, 10. Extraction device, 101, 102, 103. Extraction towers, 104, 105. Buffer tanks, 10a. Upper inlet, 10b. Lower inlet, 10c. Bottom outlet, 10d. Upper overflow port, 106. Peristaltic pump, 11. Circulating liquid storage tank, 12. Hydrogen peroxide storage tank, 13. Third peristaltic pump (third conveying device). Detailed Implementation

[0028] The device technology in specific embodiments of this utility model will be further described below with reference to the accompanying drawings. In this description, the dimensions in the drawings do not represent actual dimensions, but are used to illustrate the relative positional and connection relationships between the components. The embodiments described are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be covered within the scope of protection of this utility model.

[0029] This invention provides a continuous flow hydrogen peroxide production system, which enables industrial-scale continuous flow production of hydrogen peroxide through system construction. (Refer to...) Figure 1 A schematic diagram of the overall structure of a continuous flow hydrogen peroxide production system, combined with... Figure 2 The continuous flow hydrogen peroxide production system includes a fixed frame 1 with a three-layer structure. The bottom layer 1a, middle layer 1b, and top layer 1c all have load-bearing panels on their right sides. The top layer 1c has an aluminum frame securing the hydrogenation reaction device 2 on its left side, and a water electrolysis hydrogen production device 3 and a DC power supply 31 for powering the water electrolysis hydrogen production device 3 on its right side via the load-bearing panel. The middle layer 1b has an aluminum frame securing the oxidation reaction device 4, a first double-headed peristaltic pump 5 (as the first conveying device), and a second double-headed peristaltic pump 6 (as the second conveying device). A centralized control cabinet 7 is secured on its right side via the load-bearing panel and frame, housing the hydrogenation reaction liquid storage tank 8 and the oxidation reaction liquid storage tank 9. The bottom layer 1a houses the extraction device 10, the circulating liquid storage tank 11, the hydrogen peroxide storage tank 12, and the third peristaltic pump 13 (as the third conveying device). All devices are connected via polytetrafluoroethylene (PTFE) tubing to achieve a continuous flow hydrogen peroxide production process.

[0030] Conventional continuous-flow hydrogenation and oxidation reactors can be used in this embodiment, such as reactors incorporating diaphragms, diffusion layers, or porous materials. The diaphragm includes proton exchange membranes and ion exchange membranes; the diffusion layer includes one or more of gas diffusion layers and foamed metal; the porous material includes one or more of polypropylene, polyethylene, foamed stainless steel, and other porous polymer materials. Preferably, a porous material is used, more preferably polyethylene porous material. The porous material supports the catalyst to form a catalyst-supported porous layer, thereby accelerating the reaction rate. The porous material allows the reactant gas and reactant liquid to diffuse and fully mix through the material's pores, achieving uniform mixing of the gas and liquid phases during hydrogen peroxide production. Both the hydrogenation reactor 2 and the oxidation reactor 4 are equipped with an inlet, a liquid inlet, an outlet, and a liquid outlet. The outlets are blocked, allowing the reactant liquid and reactant gas to mix and react before being connected to a reactant liquid storage tank via a pipeline from the liquid outlet.

[0031] refer to Figure 2 and Figure 3The water electrolysis hydrogen production device 3 generates oxygen and hydrogen through water electrolysis. It has a hydrogen outlet 3a and an oxygen outlet 3b. The hydrogen outlet 3a is connected to the inlet of the hydrogenation reaction device 2 via a polytetrafluoroethylene (PTFE) tube, and the oxygen outlet 3b is connected to the inlet of the oxidation reaction device 4 via a PTFE tube. The water electrolysis hydrogen production device 3 itself can be equipped with a gas speed control, or the gas input can be monitored and controlled by installing a gas speed control device on the gas pipeline. The hydrogenation reaction device 2 and the hydrogenation reaction liquid storage tank 8 are bidirectionally connected via a gas pipeline. The hydrogenation reaction liquid storage tank 8 and the oxidation reaction liquid storage tank 9 are unidirectionally connected via a liquid pipeline. The oxidation reaction liquid storage tank 9 and the oxidation reaction device 4 are bidirectionally connected via a liquid pipeline. The oxidation reaction liquid storage tank 9 and the extraction device 10 are unidirectionally connected via a liquid pipeline. The extraction device 10 is connected to the circulating liquid storage tank 11 and the hydrogen peroxide storage tank 12 via liquid pipelines. The circulating liquid storage tank 11 is connected to the hydrogenation reaction liquid storage tank 8 via a liquid pipeline. The liquid pipelines are controlled by the first double-headed peristaltic pump 5, the second double-headed peristaltic pump 6, and the third peristaltic pump 13.

[0032] Specifically, one pump head of the first dual-head peristaltic pump 5 controls the reaction liquid in the lower zone of the hydrogenation reaction liquid storage tank 8 to enter the inlet of the hydrogenation reaction device 2, where it undergoes a hydrogenation reaction with the hydrogen gas entering through the gas inlet. The gas-liquid mixture then returns to the upper zone of the hydrogenation reaction liquid storage tank 8 through the outlet. The other pump head controls the reaction liquid in the upper zone of the hydrogenation reaction liquid storage tank 8 to enter the lower zone of the oxidation reaction liquid storage tank 9. Similarly, one pump head of the second dual-head peristaltic pump 6 controls the reaction liquid in the lower zone of the oxidation reaction liquid storage tank 9 to enter the inlet of the oxidation reaction device 4, where it undergoes an oxidation reaction with the oxygen entering through the gas inlet. The gas-liquid mixture then returns to the upper zone of the oxidation reaction liquid storage tank 9 through the outlet. The other pump head controls the reaction liquid in the upper zone of the oxidation reaction liquid storage tank 9 to enter the extraction device 10. Storage tanks are used as intermediate buffer tanks. The "upper zone" and "lower zone" refer to the upper and lower halves of the storage tank, respectively. In hydrogenation reaction liquid storage tank 8, the upper half contains mostly hydrogenated reaction liquid, while the lower half contains mostly untreated reaction liquid. Similarly, in oxidation reaction liquid storage tank 9, the upper half contains mostly oxidized reaction liquid, while the lower half contains mostly untreated reaction liquid. Furthermore, both hydrogenation reaction liquid storage tank 8 and oxidation reaction liquid storage tank 9 are equipped with exhaust pipes at their tops to discharge excess hydrogen and oxygen, respectively. The arrangement of the fluid pathways can be achieved by setting two-inlet, two-outlet feed caps on the storage tanks and controlling the insertion depth of the pipelines.

[0033] refer to Figure 4The extraction apparatus 10 includes three extraction columns 101, 102, and 103. Extraction columns 101 and 102 are connected by a buffer tank 104, and extraction columns 102 and 103 are connected by a buffer tank 105. The solution driving in the extraction apparatus 10 is accomplished by a matching peristaltic pump 106. The extractant cannot be directly fed into the three extraction columns via overflow; a buffer tank is required to store the overflow extractant, and the matching peristaltic pump drives the flow. Extraction columns 101, 102, and 103 have identical structures. Taking extraction column 101 as an example, refer to... Figure 5 It includes an upper inlet 10a, a lower inlet 10b, a bottom outlet 10c, and an upper overflow outlet 10d. While the oxidation reaction liquid in the oxidation reaction liquid storage tank 9 is introduced into the extraction tower 101 through the upper inlet 10a, the extractant enters through the lower inlet 10b at the same flow rate. The extraction device is activated with vibration and stirring to accelerate the extraction process. After countercurrent extraction, the light phase extractant flows into the buffer tank 104 through the upper overflow outlet 10d. The peristaltic pump 106 drives it to flow into the extraction tower 102 through the upper inlet, and so on. After three stages of extraction, the extractant contains only hydrogen peroxide aqueous solution, which is directly introduced into the hydrogen peroxide storage tank 12 through the upper overflow outlet of the extraction tower 103. The solution at the bottom of the extraction device is recovered to the circulating liquid storage tank 11. The third peristaltic pump 13 drives the reaction liquid in the circulating liquid storage tank 11 back to the lower zone of the hydrogenation reaction liquid storage tank 8, realizing the circulation of the entire process and reducing the loss of reaction liquid. The circulating liquid storage tank 11 and buffer tanks 104 and 105 are all equipped with one inlet and one outlet feed cap, while the hydrogen peroxide storage tank 12 is equipped with one inlet feed cap.

[0034] refer to Figure 6 The water electrolysis hydrogen production unit 3, extraction unit 10, first dual-head peristaltic pump 5, second dual-head peristaltic pump 6, and third peristaltic pump 13 are controlled by a centralized control cabinet 7, enabling unified management. The centralized control cabinet 7 includes power switches for the reaction system, switches for the liquid delivery devices, flow rate settings and numerical displays, gas rate settings and numerical displays, and displays the temperature of each storage tank during system operation via temperature sensor settings. This allows for large-scale on-site production of hydrogen peroxide, improving product selectivity and enhancing the automated production technology for hydrogen peroxide.

[0035] The above embodiments are only used to further illustrate a continuous flow hydrogen peroxide production system of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A continuous flow hydrogen peroxide production system, characterized in that: The system includes a water electrolysis hydrogen production unit, a hydrogenation reaction unit, a hydrogenation reaction liquid storage tank, an oxidation reaction liquid storage tank, an oxidation reaction unit, an extraction unit, a circulating liquid storage tank, and a hydrogen peroxide storage tank. The water electrolysis hydrogen production unit includes a hydrogen outlet and an oxygen outlet. The hydrogen outlet is connected to the hydrogenation reaction unit, and the oxygen outlet is connected to the oxidation reaction unit. The hydrogenation reaction unit and the hydrogenation reaction liquid storage tank are bidirectionally connected via liquid pipelines. The hydrogenation reaction liquid storage tank and the oxidation reaction liquid storage tank are unidirectionally connected via liquid pipelines. The oxidation reaction liquid storage tank and the oxidation reaction unit are bidirectionally connected via liquid pipelines. The oxidation reaction liquid storage tank and the extraction unit are unidirectionally connected via liquid pipelines. The extraction unit is connected to the circulating liquid storage tank and the hydrogen peroxide storage tank via liquid pipelines. The circulating liquid storage tank is connected to the hydrogenation reaction liquid storage tank via liquid pipelines. The liquid pipelines are controlled by a conveying device.

2. The continuous flow hydrogen peroxide production system according to claim 1, characterized in that: The conveying device includes a first conveying device; the first conveying device is a dual-head peristaltic pump, one pump head is used to control the reaction liquid in the lower zone of the hydrogenation reaction liquid storage tank to enter the hydrogenation reaction device and then return to the upper zone of the hydrogenation reaction liquid storage tank, and the other pump head is used to control the reaction liquid in the upper zone of the hydrogenation reaction liquid storage tank to enter the lower zone of the oxidation reaction liquid storage tank.

3. The continuous flow hydrogen peroxide production system according to claim 2, characterized in that: After the reaction, the gas-liquid mixture returns to the upper area of ​​the hydrogenation reaction liquid storage tank, which is also equipped with a waste gas discharge pipe.

4. The continuous flow hydrogen peroxide production system according to claim 1, characterized in that: The conveying device includes a second conveying device; the second conveying device is a dual-head peristaltic pump, one pump head is used to control the reaction liquid in the lower zone of the oxidation reaction liquid storage tank to enter the oxidation reaction device and then return to the upper zone of the oxidation reaction liquid storage tank after reaction, and the other pump head is used to control the reaction liquid in the upper zone of the oxidation reaction liquid storage tank to enter the extraction device.

5. The continuous flow hydrogen peroxide production system according to claim 4, characterized in that: After the reaction, the gas-liquid mixture returns to the upper area of ​​the oxidation reaction liquid storage tank, which is also equipped with a waste gas discharge pipe.

6. The continuous flow hydrogen peroxide production system according to claim 1, characterized in that: The conveying device includes a third conveying device, which is used to control the reaction liquid in the circulating liquid storage tank to enter the lower zone of the hydrogenation reaction liquid storage tank.

7. The continuous flow hydrogen peroxide production system according to claim 1, characterized in that: The extraction device includes three extraction towers, with adjacent extraction towers connected by buffer tanks.

8. The continuous flow hydrogen peroxide production system according to claim 1, characterized in that: It also includes a fixed frame with a three-layer structure. The extraction device, circulating liquid storage tank and hydrogen peroxide storage tank are placed at the bottom layer, the oxidation reaction device, hydrogenation reaction liquid storage tank and oxidation reaction liquid storage tank are placed at the middle layer, and the hydrogenation reaction device and water electrolysis hydrogen production device are placed at the top layer.

9. The continuous flow hydrogen peroxide production system according to claim 1, characterized in that: It also includes a centralized control cabinet, under which the water electrolysis hydrogen production device, extraction device and conveying device are controlled.

10. The continuous flow hydrogen peroxide production system according to claim 1, characterized in that: The hydrogenation reactor and the oxidation reactor are each equipped with a catalyst-supported porous layer.

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