Continuous production system of 3,3'-diamino-4,4'-azofurazan

Abstract

The utility model relates to 3, 3' -diamino -4, 4' - continuous production equipment technical field of azofurazan, concretely, relate to a kind of 3, 3' -diamino -4, 4' - continuous production system of azofurazan. Continuous production system includes the chemical reaction device of carrying out chemical reaction, electrochemical reaction device of carrying out electrochemical reaction and the oxidant repair device of carrying out oxidant regeneration, and the anode liquid inlet of electrochemical reaction device is communicated with the reaction liquid outlet of chemical reaction device;The anode liquid outlet of electrochemical reaction device and the repair liquid import of oxidant repair device are communicated, and the repair liquid outlet of oxidant repair device is communicated with the reaction liquid import of chemical reaction device. It can improve the production efficiency of 3, 3' -diamino -4, 4' - azofurazan, and process stability can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of continuous production equipment for 3,3'-diamino-4,4'-azofuran, and more specifically, to a continuous production system for 3,3'-diamino-4,4'-azofuran. Background Technology

[0002] Nitrogen-rich energetic materials, especially 3,3'-diamino-4,4'-azofuran, possess excellent detonation properties. Due to their advantages such as good heat resistance, high standard heat of formation, low sensitivity, small critical diameter, and excellent detonation performance, their comprehensive performance is very similar to that of the currently used high-energy, detonation-sensitive energetic material 1,3,5-triamino-2,4,6-trinitrobenzene. Therefore, they have been widely studied and applied in fields such as solid rocket propellants, civil blasting, and traffic safety.

[0003] Several traditional chemical synthesis methods for 3,3'-diamino-4,4'-azofuran have been reported. For example, oxidation methods using strong oxidants (such as KMnO4) can induce an azo reaction in 3,4-diaminofuran, achieving efficient preparation of this compound. However, because the reaction involves the single use of a strong oxidant, not only are the byproducts harmful to the environment, but the use of the oxidant also poses certain risks.

[0004] To address this issue, existing patents (CN116516362A, CN115838944A) propose electrochemical strategies for preparing 3,3'-diamino-4,4'-azofuran using anodic oxidation. While this method is highly economical for small-scale production, it faces numerous challenges as production scales up, including low reaction efficiency, lack of dedicated equipment, unstable product quality, low automation, and time consumption, limiting its scalability. To date, no mature large-scale preparation process for 3,3'-diamino-4,4'-azofuran has been reported.

[0005] In summary, the existing methods for preparing 3,3'-diamino-4,4'-azofuran have problems such as low production efficiency and unstable processes, and there is no suitable production equipment to improve these problems. Utility Model Content

[0006] The purpose of this invention is to provide a continuous production system for 3,3'-diamino-4,4'-azofuran, which can improve the production efficiency of 3,3'-diamino-4,4'-azofuran and enhance process stability.

[0007] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a continuous production system for 3,3'-diamino-4,4'-azofuran, comprising a chemical reaction device for carrying out a chemical reaction, an electrochemical reaction device for carrying out an electrochemical reaction, and an oxidant regeneration device for regenerating the oxidant. The reaction liquid outlet of the chemical reaction device is connected to the anode inlet of the electrochemical reaction device; the anode outlet of the electrochemical reaction device is connected to the regeneration liquid inlet of the oxidant regeneration device, and the regeneration liquid outlet of the oxidant regeneration device is connected to the reaction liquid inlet of the chemical reaction device.

[0008] In an optional embodiment, the chemical reaction apparatus includes a chemical reactor, which is provided with a raw material inlet and an oxidant inlet; the chemical reactor is equipped with a stirrer, and a filter is provided at the reaction liquid outlet of the chemical reactor.

[0009] In an optional embodiment, a peristaltic pump is provided between the reaction liquid outlet of the chemical reaction device and the anode inlet of the electrochemical reaction device.

[0010] In an optional embodiment, the electrochemical reaction device includes an anode-cathode coupling reactor, a cathode reaction liquid circulator, and an electrochemical working device. The anode inlet of the anode-cathode coupling reactor is connected to the reaction liquid outlet of the chemical reaction device, the anode outlet of the anode-cathode coupling reactor is connected to the repair liquid inlet of the oxidant repair device, the cathode outlet of the anode-cathode coupling reactor is connected to the cathode circulation inlet of the cathode reaction liquid circulator, the cathode circulation outlet of the cathode reaction liquid circulator is connected to the cathode inlet of the anode-cathode coupling reactor, and the electrochemical working device is connected to the anode-cathode coupling reactor.

[0011] In an optional embodiment, the anode-cathode coupled reactor includes a membrane electrode anode and a membrane electrode cathode containing carbon cloth and a proton exchange membrane. The electrochemical working device is connected to the membrane electrode cathode via a membrane electrode motor lug, and the electrochemical working device is connected to the membrane electrode anode via an electrode wire. The membrane electrode anode and the membrane electrode cathode are respectively disposed on both sides of the proton exchange membrane. The reaction liquid outlet of the chemical reaction device is connected to the anode inlet of the membrane electrode anode, the anode outlet of the electrode anode is connected to the repair liquid inlet of the oxidant repair device, the cathode outlet of the membrane electrode cathode is connected to the cathode circulation inlet of the cathode reaction liquid circulator, and the cathode circulation outlet of the cathode reaction liquid circulator is connected to the cathode inlet of the membrane electrode cathode.

[0012] In an optional embodiment, a peristaltic pump is provided between the cathode circulation outlet of the cathode reaction liquid circulator and the cathode inlet of the membrane electrode cathode.

[0013] In an optional embodiment, a filtration device is further included, which is disposed between the electrochemical reaction device and the oxidant repair device; the anode outlet of the electrochemical reaction device is connected to the inlet of the filtration device, and the outlet of the filtration device is connected to the repair liquid inlet of the oxidant repair device.

[0014] In an optional embodiment, a filter screen is provided inside the filtering device.

[0015] In an optional embodiment, the oxidant remediation device includes an anodic remediation reactor, a cathodic remediation reactor, and a power source. The anodic remediation reactor and the cathodic remediation reactor are connected and a proton exchange membrane is provided between them. The anodic remediation reactor and the cathodic remediation reactor are respectively connected to the anode and cathode of the power source via wires. The remediation liquid inlet of the anodic remediation reactor is connected to the anode outlet of the electrochemical reaction device, and the remediation liquid outlet of the anodic remediation reactor is connected to the reaction liquid inlet of the chemical reaction device.

[0016] In an optional embodiment, the anode repair reactor includes an anode repair tank and a repair anode, the repair anode being disposed in the anode repair tank and connected to the anode of the power supply; The cathode repair reactor includes a cathode repair tank and a repair cathode. The cathode repair tank and the anode repair tank are connected and a proton exchange membrane is disposed between them. The repair cathode is disposed in the cathode repair tank and is connected to the cathode of the power source.

[0017] The beneficial effects of the continuous production system for 3,3'-diamino-4,4'-azofuran provided in this embodiment of the invention include: This invention combines a chemical reaction device and an electrochemical reaction device, achieving synergistic effects of chemical oxidation and electrochemical catalysis, thereby improving the efficiency of the raw material reaction and increasing the yield. Simultaneously, the oxidant repair device allows the oxidant to be regenerated and recycled back to the chemical reaction device for further chemical and electrochemical reactions, significantly improving the utilization efficiency of the oxidant, reducing production costs, and achieving highly efficient and automated production of 3,3'-diamino-4,4'-azofuran, while reducing equipment maintenance difficulty and manpower input. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the continuous production system for 3,3'-diamino-4,4'-azofuran provided in this embodiment.

[0020] Icons: 100-Continuous production system of 3,3'-diamino-4,4'-azofuran; 110-Chemical reaction unit; 1-Chemical reactor; 2-Raw material inlet; 3-Oxidant inlet; 4-Agitator; 5-Reaction liquid outlet; 8-Filter plate; 9-Hose; 10-Peristaltic pump; 120-Electrochemical reaction unit; 121-Anode-cathode coupling reactor; 32-Cathode reaction liquid circulator; 19-Electrochemical working device; 11-Membrane electrode anode; 14-Membrane electrode cathode; 123-Proton exchange membrane; 12-Anode inlet; 15-Cathode inlet; 13-Anode outlet. ; 16-Cathode outlet; 17-Membrane electrode motor lug; 18-Electrode wire; 34-Cathode circulation outlet; 33-Cathode circulation inlet; 20-Filter device; 21-Filter screen; 22-Inlet; 23-Outlet; 130-Oxidant repair device; 131-Anode repair reactor; 132-Cathode repair reactor; 31-Power supply; 26-Repair solution outlet; 133-Anode repair tank; 27-Repair anode; 25-Repair solution inlet; 29-Proton exchange membrane; 28-Repair cathode; 134-Cathode repair tank; 6-Reaction solution inlet; 7-Valve; 30-Power supply wire. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0027] The synthesis of 3,3'-diamino-4,4'-azofuran generally employs chemical or electrocatalytic reactions. However, using a single reaction has drawbacks such as insufficient utilization of reactants, low reaction yield, and secondary pollution. In addition, the utilization rate of oxidants is low, resulting in significant waste.

[0028] To address the above problems, this utility model provides a novel continuous production system 100 for 3,3'-diamino-4,4'-azofuran, see [link to relevant documentation]. Figure 1 This invention uses 3,4-diaminofuran as a reactant, containing Ce. 4+ The following example illustrates the reaction of a solution of [a substance] as an oxidant and the two substances mixed together.

[0029] Specifically, the continuous production system 100 includes a chemical reaction device 110 for carrying out chemical reactions, wherein the chemical reaction device 110 includes a chemical reactor 1. In this embodiment, the chemical reactor 1 is a vertical reaction tank, but it is understood that other devices capable of carrying out chemical reactions may also be used.

[0030] Chemical reactor 1 is equipped with a raw material inlet 2, namely the inlet for 3,4-diaminofuran, and an oxidant inlet 3. Specifically, in this embodiment, the raw material inlet 2 and the oxidant inlet 3 are located at the top of chemical reactor 1. A stirrer 4 is installed inside chemical reactor 1 to agitate the reaction solution, thereby reacting 3,4-diaminofuran with Ce-containing compounds. 4+The solution can be mixed and reacted within the chemical reactor, initially achieving the production of 3,3'-diamino-4,4'-azofuran. Since the formed 3,3'-diamino-4,4'-azofuran is a solid, to reduce the clogging of the membrane in the subsequent electrocatalytic reaction, the solution after the reaction needs to be filtered. Therefore, a filter 8 is installed at the reaction liquid outlet 5 of the chemical reactor 1. At this time, the reaction conditions are ambient temperature and pressure, and the stirring speed is 3000-4500 r / min.

[0031] Furthermore, the reaction solution outlet 5 of chemical reactor 1 is connected to peristaltic pump 10, thereby introducing the reaction solution in chemical reactor 1 into subsequent reactors for reaction. Specifically, the reaction solution outlet 5 of chemical reactor 1 is connected to peristaltic pump 10 via hose 9. At this time, the rotational speed of peristaltic pump 10 is controlled at 20-40 r / min.

[0032] Furthermore, it also includes an electrochemical reaction device 120 for carrying out electrochemical reactions. The peristaltic pump 10 is connected to the anode inlet 12 of the electrochemical reaction device 120. That is, a peristaltic pump 10 is provided between the reaction liquid outlet 5 of the chemical reaction device 110 and the anode inlet 12 of the electrochemical reaction device 120, so that the reaction solution in the chemical reaction device 110 (containing oxidant and 3,4-diaminofuran at this time) is introduced into the electrochemical reaction device 120 to carry out electrochemical catalytic reactions.

[0033] Specifically, the electrochemical reaction device 120 includes an anode-cathode coupled reactor 121, which is a membrane electrolyzer capable of electrocatalysis. Specifically, it includes a membrane electrode anode 11, a membrane electrode cathode 14, and a proton exchange membrane 123. The membrane electrode anode 11 and the membrane electrode cathode 14 are respectively disposed on opposite sides of the proton exchange membrane 123. The main function of the proton exchange membrane is to isolate the positive and negative solutions. The reaction liquid outlet 5 of the chemical reaction device 110 is connected to the anode inlet 12 of the membrane electrode anode 11, that is, the unreacted reaction solution is introduced into the anode side, allowing the unreacted raw materials to continue to be electrocatalyzed by the anode, achieving the secondary production of 3,3'-diamino-4,4'-azofuran. Meanwhile, the hydrogen evolution reaction occurs on the cathode side. The reaction voltage in the anode-cathode coupled reactor 121 is controlled at 0.8-1.2 V.

[0034] Furthermore, the electrochemical reaction device 120 includes a cathode reaction liquid circulator 32, which recycles the cathode reaction liquid, further saving costs. Specifically, the cathode outlet 16 of the anode-cathode coupling reactor 121 is connected to the cathode circulation inlet 33 of the cathode reaction liquid circulator 32, and the cathode circulation outlet 34 of the cathode reaction liquid circulator 32 is connected to the cathode inlet 15 of the anode-cathode coupling reactor 121. More specifically, the cathode outlet 16 of the membrane electrode cathode 14 is connected to the cathode circulation inlet 33 of the cathode reaction liquid circulator 32, and the cathode circulation outlet 34 of the cathode reaction liquid circulator 32 is connected to the cathode inlet 15 of the membrane electrode cathode 14.

[0035] A peristaltic pump 10 is provided between the cathode circulation outlet 34 of the cathode reaction liquid circulator 32 and the cathode inlet 15 of the membrane electrode cathode 14.

[0036] Furthermore, the electrochemical reaction device 120 includes an electrochemical working unit 19, which can be a low-current electrochemical workstation. The electrochemical working unit 19 is connected to the membrane electrode cathode 14 through the membrane electrode motor lug 17, and the electrochemical working unit 19 is connected to the membrane electrode anode 11 through the electrode wire 18; thereby realizing electrocatalysis.

[0037] Furthermore, the continuous production system 100 also includes a filtration device 20. The anode outlet 13 of the electrochemical reaction device 120 is connected to the inlet 22 of the filtration device 20, thereby filtering the solution and product flowing out of the electrochemical reaction device 120 and collecting the solid product 3,3'-diamino-4,4'-azofuran. The inlet 22 of the filtration device 20 is located above the filter screen 21 and the outlet 23. The filter screen 21 is installed inside the filtration device 20, or the filtration device 20 can be an existing filter tank. The remaining solution (containing Ce) 4+ Oxidizing agent, 3,4-diaminofuran and Ce 3+ Then repairs will be carried out.

[0038] Specifically, the continuous production system 100 also includes an oxidant remediation device 130, wherein the outlet 23 of the filter device 20 is connected to the remediation liquid inlet 25 of the oxidant remediation device 130, so that Ce 3+ Repair to Ce 4+ The oxidation function is restored during the recovery period. The repair liquid outlet 26 of the oxidant repair device 130 is connected to the reaction liquid inlet 6 of the chemical reaction device 110. The reaction liquid inlet 6 is equipped with a valve 7. Then the solution is circulated to the chemical reaction device 110 for chemical reaction. This cycle is repeated to continuously form 3,3'-diamino-4,4'-azofuran and reduce the use of oxidant.

[0039] Specifically, the oxidant remediation device 130 includes an anode remediation reactor 131, a cathode remediation reactor 132, and a power supply 31. The anode remediation reactor 131 and the cathode remediation reactor 132 are connected and a proton exchange membrane 29 is provided between them. The anode remediation reactor 131 and the cathode remediation reactor 132 are respectively connected to the anode and cathode of the power supply 31 by wires. The remediation liquid inlet 25 of the anode remediation reactor 131 is connected to the anode outlet 13 of the electrochemical reaction device 120, and the remediation liquid outlet 26 of the anode remediation reactor 131 is connected to the reaction liquid inlet 6 of the chemical reaction device 110.

[0040] More specifically, the anodic remediation reactor 131 includes an anodic remediation tank 133 and a remediation anode 27. The remediation anode 27 is disposed in the anodic remediation tank 133 and is connected to the anode of the power supply 31. The cathode remediation reactor 132 includes a cathode remediation tank 134 and a remediation cathode 28. The cathode remediation tank 134 and the anodic remediation tank 133 are connected, and the proton exchange membrane 29 is disposed between them. The remediation cathode 28 is disposed in the cathode remediation tank 134 and is connected to the cathode of the power supply 31. Specifically, the remediation anode 27 and the remediation cathode 28 are respectively connected to the power supply 31 via power lines 30. 3+ After being repaired by positive direct current, it is oxidized to Ce. 4+ The fluid ultimately returns to the chemical reaction apparatus 110 via the peristaltic pump 10, forming a closed-loop circuit. The DC voltage used in the oxidant repair apparatus 130 is 1.5-2.5 V.

[0041] The oxidant repair device 130 can be a device with the above-described structure, or it can be a dual-pool system with a PEM membrane.

[0042] The solution transport process is as follows: The reaction solution is transported from the chemical reactor 1 to the membrane electrode anode 11 of the anode-cathode coupled reactor 121 by the peristaltic pump 10 for electrocatalysis. Then, the product is collected by filtration device 20. Next, it is repaired by the oxidant repair device 130 to restore Ce. 3+ Become Ce 4+ The repaired solution is then circulated to the chemical reactor 1 via peristaltic pump 10 for reaction. Simultaneously, the reaction solution on the cathode side of the membrane electrode cathode 14 in the anode-cathode coupling reactor 121 is circulated to the cathode reaction solution circulator 32 via peristaltic pump 10, and then returned to the membrane electrode cathode 14 for hydrogen evolution.

[0043] This invention combines a chemical reaction device 110 for chemical reactions and an electrochemical reaction device 120 for electrochemical reactions, effectively improving upon the shortcomings of traditional single-reaction types (chemical reactions, electrocatalytic reactions), such as insufficient utilization of reaction raw materials, low reaction yields, and secondary pollution. Furthermore, by incorporating an oxidant repair device 130 to repair the oxidant and recycling the repaired solution back to both the chemical reaction device 110 and the electrochemical reaction device 120, the reaction raw materials can be fully and automatically recycled, significantly improving reaction yield and efficiency.

[0044] This invention provides a method for producing 3,3'-diamino-4,4'-azofuran using the aforementioned continuous production system 100, the specific process of which is as follows: Step 1: A sulfuric acid solution containing cerium sulfate of a certain concentration is added dropwise through the oxidant inlet 3 of the chemical reaction apparatus 110 to the sulfuric acid solution of 3,4-diaminofuran added to the chemical reaction apparatus 110 through the raw material inlet 2. The stirring speed of the stirrer 4 in the chemical reaction apparatus 110 is set to 3000 r / min to carry out the preliminary azo reaction and obtain a certain mass of 3,3'-diamino-4,4'-azofuran.

[0045] Step 2: After maintaining the reaction solution in the chemical reaction device 110 for 10 minutes, turn on the peristaltic pump 10 and control the speed of the peristaltic pump 10 at 20 r / min. The reaction solution is stably delivered to the anode side of the anode-cathode coupled reactor 121 through the hose 9. The reaction voltage is controlled at 0.8 V. The unreacted 3,4-diaminofuran continues to be electrocatalyzed by the anode to achieve the secondary production of 3,3'-diamino-4,4'-azofuran. Meanwhile, sulfuric acid solution is used as an auxiliary solution at the cathode to carry out the hydrogen evolution reaction.

[0046] The third step involves conveying the anolyte and product to a filter module to filter out and collect the solid product 3,3'-diamino-4,4'-azofuran, while the waste liquid enters the next device. Step 4, Ce 4+ Ce produced after reduction 3+ The waste liquid enters the oxidant remediation unit 130, and the DC remediation voltage is controlled at 1.5 V. The Ce is removed through DC remediation. 3+ Oxidized to Ce 4+ The Ce will be repaired 4+ The solution is eventually returned to the chemical reaction device 110 via the peristaltic pump 10, realizing the recycling of Ce and forming a closed loop.

[0047] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A continuous production system for 3,3'-diamino-4,4'-azofuran, characterized in that, The device includes a chemical reaction apparatus for performing a chemical reaction, an electrochemical reaction apparatus for performing an electrochemical reaction, and an oxidant regeneration apparatus for regenerating an oxidant. The reaction liquid outlet of the chemical reaction apparatus is connected to the anode inlet of the electrochemical reaction apparatus; the anode outlet of the electrochemical reaction apparatus is connected to the regeneration liquid inlet of the oxidant regeneration apparatus; and the regeneration liquid outlet of the oxidant regeneration apparatus is connected to the reaction liquid inlet of the chemical reaction apparatus.

2. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 1, characterized in that, The chemical reaction apparatus includes a chemical reactor, which is provided with a raw material inlet and an oxidant inlet; the chemical reactor is equipped with a stirrer, and a filter is provided at the reaction liquid outlet of the chemical reactor.

3. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 1, characterized in that, A peristaltic pump is installed between the reaction liquid outlet of the chemical reaction device and the anode inlet of the electrochemical reaction device.

4. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 1, characterized in that, The electrochemical reaction device includes an anode-cathode coupling reactor, a cathode reaction liquid circulator, and an electrochemical working device. The anode inlet of the anode-cathode coupling reactor is connected to the reaction liquid outlet of the chemical reaction device, the anode outlet of the anode-cathode coupling reactor is connected to the repair liquid inlet of the oxidant repair device, the cathode outlet of the anode-cathode coupling reactor is connected to the cathode circulation inlet of the cathode reaction liquid circulator, the cathode circulation outlet of the cathode reaction liquid circulator is connected to the cathode inlet of the anode-cathode coupling reactor, and the electrochemical working device is connected to the anode-cathode coupling reactor.

5. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 4, characterized in that, The anode-cathode coupled reactor includes a membrane electrode anode and a membrane electrode cathode containing carbon cloth and a proton exchange membrane. The electrochemical working device is connected to the membrane electrode cathode via a membrane electrode motor lug, and the electrochemical working device is connected to the membrane electrode anode via an electrode wire. The membrane electrode anode and membrane electrode cathode are respectively disposed on opposite sides of the proton exchange membrane. The reaction liquid outlet of the chemical reaction device is connected to the anode inlet of the membrane electrode anode, the anode outlet of the electrode anode is connected to the repair liquid inlet of the oxidant repair device, the cathode outlet of the membrane electrode cathode is connected to the cathode circulation inlet of the cathode reaction liquid circulator, and the cathode circulation outlet of the cathode reaction liquid circulator is connected to the cathode inlet of the membrane electrode cathode.

6. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 5, characterized in that, A peristaltic pump is installed between the cathode circulation outlet of the cathode reaction liquid circulator and the cathode inlet of the membrane electrode cathode.

7. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 1, characterized in that, It also includes a filtration device, which is disposed between the electrochemical reaction device and the oxidant repair device; the anode outlet of the electrochemical reaction device is connected to the inlet of the filtration device, and the outlet of the filtration device is connected to the repair liquid inlet of the oxidant repair device.

8. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 7, characterized in that, The filtration device is equipped with a filter screen.

9. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 1, characterized in that, The oxidant remediation device includes an anodic remediation reactor, a cathodic remediation reactor, and a power source. The anodic and cathodic remediation reactors are connected and a proton exchange membrane is provided between them. The anodic and cathodic remediation reactors are respectively connected to the anode and cathode of the power source via wires. The remediation liquid inlet of the anodic remediation reactor is connected to the anode outlet of the electrochemical reaction device, and the remediation liquid outlet of the anodic remediation reactor is connected to the reaction liquid inlet of the electrochemical reaction device.

10. The continuous production system for 3,3'-diamino-4,4'-azofuran according to claim 9, characterized in that, The anode repair reactor includes an anode repair tank and a repair anode. The repair anode is disposed in the anode repair tank and is connected to the anode of the power supply. The repair liquid outlet of the anode repair tank is connected to the reaction liquid inlet of the chemical reaction device. The cathode repair reactor includes a cathode repair tank and a repair cathode. The cathode repair tank and the anode repair tank are connected and a proton exchange membrane is disposed between them. The repair cathode is disposed in the cathode repair tank and is connected to the cathode of the power source.

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