Electron beam irradiation process and system for removing unsymmetrical dimethylhydrazine

Abstract

The application provides an electron beam irradiation process and system for removing unsymmetrical dimethylhydrazine, which comprises adding an oxidizing agent to wastewater to be treated with unsymmetrical dimethylhydrazine at a concentration of 100-50000 mg / L, then performing electron beam irradiation; collecting gaseous unsymmetrical dimethylhydrazine overflowing in the process of electron beam irradiation; returning the gaseous unsymmetrical dimethylhydrazine to the wastewater to be treated for irradiation; repeating steps 2-3 until the unsymmetrical dimethylhydrazine in the wastewater to be treated is completely removed. The application adds an oxidizing agent to the wastewater to be treated, then performs electron beam irradiation, the irradiation effect makes water decompose to directly produce active species, and the heat generated in the irradiation process activates the active species produced by the oxidizing agent to jointly act on the removal of unsymmetrical dimethylhydrazine; further, gaseous unsymmetrical dimethylhydrazine overflowing due to the increase of water temperature in the process of electron beam irradiation is collected, and the collected gaseous unsymmetrical dimethylhydrazine is returned for irradiation, through multiple cycles, until the unsymmetrical dimethylhydrazine is completely removed.

Description

Technical Field

[0001] This invention relates to the field of environmental engineering technology, and in particular to an electron beam irradiation process and system for removing unsymmetrical dimethylhydrazine. Background Technology

[0002] Hydrazine compounds possess high energy density and high specific impact force, making them the fuel used in most aircraft. In recent years, the rapid development of the aerospace industry has led to a continuous increase in the demand for hydrazine compounds. However, the production and use of hydrazine compounds generate wastewater, posing serious harm to the environment and human health.

[0003] Unsymmetrical dimethylhydrazine (UDMH) is a typical hydrazine compound, a colorless, transparent liquid at room temperature with an irritating odor similar to ammonia, and is flammable and explosive. Related studies have shown that UDMH is toxic to aquatic organisms and certain plants. While UDMH does not readily decompose thermally, it does volatilize when heated. The volatilized UDMH can be harmful to humans, affecting the central nervous system and potentially causing ankylosing spondylitis and death in severe cases. my country stipulates a maximum concentration of UDMH in surface water of 0.1 mg / L, while the U.S. Safety and Health Organization sets the maximum limit for UDMH in air at 0.15 mg / m³. 3 Strict emission standards demonstrate the necessity of removing unsymmetrical dimethylhydrazine from the environment.

[0004] Currently, commonly used methods for removing unsymmetrical dimethylhydrazine (UDMH) include physical, biological, and chemical methods. Physical methods mainly include adsorption, ion exchange, and incineration. Adsorption and ion exchange only transfer UDMH from one phase to another and cannot fundamentally remove it. Incineration is energy-intensive and costly.

[0005] Biological treatment utilizes the metabolic activity of microorganisms to break down unsymmetrical dimethylhydrazine (UDMH). However, due to UDMH's high toxicity, biological treatment is not very effective. Under high concentrations of UDMH, the metabolic activity of microorganisms is significantly inhibited.

[0006] Chemical methods are currently the most widely used, mainly referring to advanced oxidation technologies, including Fenton oxidation, ozone oxidation, and electrocatalytic oxidation. These methods can effectively remove unsymmetrical dimethylhydrazine from wastewater, but they all have certain limitations. For example, Fenton oxidation requires acidic conditions. In practical applications, to achieve ideal treatment results, high concentrations of Fe(II) and hydrogen peroxide are usually added, which generates a large amount of iron sludge. Ozone oxidation is limited by the mass transfer of ozone in water, resulting in low utilization. In addition, the treatment effect of ozone is greatly affected by pH, and the operating cost is high. The current problem with electrocatalytic oxidation is that its catalytic effect is greatly affected by the electrode material, and the stability of its treatment effect needs further improvement.

[0007] Therefore, developing efficient systems and methods for removing unsymmetrical dimethylhydrazine from the environment is a key focus of current governance efforts. Summary of the Invention

[0008] To address the aforementioned problems in the existing technology, this invention provides an electron beam irradiation process and system for removing unsymmetrical dimethylhydrazine (UDMH), thereby achieving efficient removal of UDMH from the aquatic environment.

[0009] The specific details of the invention are as follows:

[0010] In a first aspect, the present invention provides an electron beam irradiation process for removing unsymmetrical dimethylhydrazine, the process comprising:

[0011] Step 1: Add an oxidant to the wastewater to be treated with a concentration of unsymmetrical dimethylhydrazine (UDMH) of 100-50000 mg / L, and then subject it to electron beam irradiation; wherein the molar ratio of the oxidant to UDMH is 1:1-5.

[0012] Step 2: Collect the gaseous unsymmetrical dimethylhydrazine that overflows during the electron beam irradiation process;

[0013] Step 3: Return the gaseous unsymmetrical dimethylhydrazine to the wastewater to be treated for irradiation;

[0014] Step 4: Repeat steps 2-3 until unsymmetrical dimethylhydrazine in the wastewater to be treated is completely removed;

[0015] The oxidant is hydrogen peroxide or persulfate;

[0016] The electron beam irradiation dose is 10-500 kGy.

[0017] Optionally, in step 1, the electron beam irradiation acts on the wastewater to be treated, raising the temperature of the wastewater. The increased temperature activates the oxidant, converting it into an active substance capable of removing COD.

[0018] Optionally, when the electron beam irradiation dose is 10-500 kGy, the temperature of the wastewater to be treated increases by 0-30°C compared to before receiving electron beam irradiation.

[0019] Optionally, the repetition is performed 2-10 times.

[0020] Optionally, the electron beam irradiation dose is 100-400 kGy.

[0021] In a second aspect, the present invention provides an electron beam irradiation system for removing unsymmetrical dimethylhydrazine (UDMH), the system being used to perform the electron beam irradiation process for removing UDMH described in the first aspect above, the system comprising: an electron beam irradiation processing unit and a gas collection and delivery unit;

[0022] The electron beam irradiation treatment unit is used to treat wastewater containing unsymmetrical dimethylhydrazine by electron beam irradiation.

[0023] The gas collection and transfer unit is used to collect the gaseous unsymmetrical dimethylhydrazine that overflows from the electron beam irradiation processing unit; and to return the gaseous unsymmetrical dimethylhydrazine to the electron beam irradiation processing unit for irradiation.

[0024] Optionally, the electron beam irradiation processing unit is equipped with an electron accelerator device for providing electron beam irradiation with a dose of 10-500 kGy.

[0025] Optionally, the electron beam irradiation processing unit is provided with an oxidant inlet for adding oxidant to the electron beam irradiation processing unit;

[0026] Optionally, the gas collection and transmission unit is equipped with a gas flow controller for automatically regulating the concentration of the returned gaseous unsymmetrical dimethylhydrazine.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] This invention provides an electron beam irradiation process for removing unsymmetrical dimethylhydrazine (UDMH). The need for adding an oxidant is determined based on the UDMH content in the wastewater. On one hand, wastewater with low UDMH content (concentration less than 100 mg / L) can be directly irradiated with an electron beam. During this process, the active species generated by the electron beam irradiation act on the UDMH, thereby removing it. The UDMH volatilized during the process enters a collection system and is returned to the wastewater for further irradiation until the UDMH is completely removed. On the other hand, it can also... By adding an oxidant (persulfate or hydrogen peroxide) to wastewater with a high concentration of unsymmetrical dimethylhydrazine (UDMH) (100-50000 mg / L), followed by electron beam irradiation, the active species generated by the electron beam irradiation itself, and the active species generated by the oxidant activated by the heat generated during irradiation, work together to enhance the removal capacity of UDMH. The gaseous UDMH that overflows during electron beam irradiation is collected and then returned to the wastewater for further irradiation until the UDMH is completely removed. This process offers advantages such as good treatment effect, low treatment cost, and simple operation.

[0029] This invention also provides an electron beam irradiation system for removing unsymmetrical dimethylhydrazine (UDMH). An electron beam irradiation treatment unit is used to treat wastewater containing UDMH using electron beam irradiation. A gas collection and delivery unit is used to collect gaseous UDMH overflowing from the electron beam irradiation treatment unit and return the gaseous UDMH to the electron beam irradiation treatment unit for further irradiation. Furthermore, this invention adds a gas flow controller to the gas collection and delivery unit to ensure that the UDMH collected by the gas collection and delivery unit is completely returned to the electron beam irradiation treatment unit for secondary irradiation, and the concentration of gaseous UDMH returning to the electron beam irradiation treatment unit can be automatically adjusted. The entire treatment process can be automatically controlled without manual intervention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 The following is a flowchart of the electron beam irradiation process for removing unsymmetrical dimethylhydrazine provided in an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of an electron beam irradiation system for removing unsymmetrical dimethylhydrazine provided in an embodiment of the present invention is shown. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention. Furthermore, all other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of the present invention.

[0034] Specific experimental steps or conditions are not specified in the embodiments; they can be performed according to the conventional experimental steps or conditions described in the prior art. Reagents and other instruments used, unless otherwise specified, are all commercially available conventional reagent products. Furthermore, the accompanying drawings are merely illustrative diagrams of the embodiments of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore, repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0035] Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of this specification.

[0036] In the description of this invention, it should be understood that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0037] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Electron beam irradiation is a novel advanced oxidation technology that removes recalcitrant organic pollutants from water through both direct and indirect effects. Direct effect refers to the high energy of the electron beam depositing directly onto the organic pollutants in the water, causing mineralization. Indirect effect refers to the activation of water molecules by electron beam irradiation, generating reactive species such as hydroxyl radicals and hydrated electrons. These reactive species react with the organic pollutants in the water, achieving the goal of removal. Compared with traditional advanced oxidation methods, electron beam irradiation has advantages such as high treatment capacity, high treatment efficiency, and no need to add chemical substances. It has certain advantages in the treatment of dyeing and printing wastewater, pharmaceutical wastewater, medical wastewater, and antibiotic residue.

[0039] Based on this, the present invention aims to provide a highly efficient, low-carbon, and simple process for removing unsymmetrical dimethylhydrazine (UDMH) from wastewater using electron beam irradiation technology. During electron beam irradiation, on the one hand, the generated active species can directly react with UDMH, removing it. On the other hand, for water bodies with high UDMH content, the characteristic of electron beam irradiation raising the water temperature can be utilized, and an oxidant (persulfate or hydrogen peroxide) can be added to the water. The high temperature generated by electron beam irradiation enhances the activation of the oxidant, producing more active species, thereby enhancing the removal capacity of UDMH. Simultaneously, the volatilized UDMH is collected during electron beam irradiation and returned to the electron beam irradiation process for further irradiation. Through multiple cycles, UDMH in the wastewater can be completely removed. The present invention also provides an electron beam irradiation system for removing UDMH, used to execute the above-mentioned electron beam irradiation process for removing UDMH, achieving complete removal of UDMH. Specific implementation details are as follows:

[0040] In a first aspect, the present invention provides an electron beam irradiation process for removing unsymmetrical dimethylhydrazine. Figure 1 The following is a flowchart of the electron beam irradiation process for removing unsymmetrical dimethylhydrazine provided in an embodiment of the present invention, as shown in the figure. Figure 1 As shown, the process includes:

[0041] Step 1: Add an oxidant to the wastewater to be treated with a concentration of unsymmetrical dimethylhydrazine (UDMH) of 100-50000 mg / L, and then subject it to electron beam irradiation; wherein the molar ratio of oxidant to UDMH is 1:1-5.

[0042] Step 2: Collect the gaseous unsymmetrical dimethylhydrazine that overflows during electron beam irradiation;

[0043] Step 3: Return the collected gaseous unsymmetrical dimethylhydrazine to the wastewater to be treated for irradiation;

[0044] Step 4: Repeat steps 2-3 until unsymmetrical dimethylhydrazine in the wastewater to be treated is completely removed.

[0045] In specific implementation, this embodiment is a treatment process designed for wastewater with a high content of unsymmetrical dimethylhydrazine (100-50000 mg / L). Before electron beam irradiation treatment, an oxidant, specifically hydrogen peroxide or persulfate, is added to the wastewater. Then, the wastewater is subjected to electron beam irradiation treatment with a total dose of 10-500 kGy, preferably 100-400 kGy. During the electron beam irradiation treatment, on the one hand, the indirect effect of electron beam irradiation activates water molecules, generating active species such as hydroxyl radicals and hydrated electrons. These active species can directly react with unsymmetrical dimethylhydrazine to remove it. On the other hand, electron beam irradiation on the wastewater raises its temperature. The increased temperature of the wastewater enhances the activation of the oxidant, which (activates persulfate or hydrogen peroxide) generates more active species. These active species further enhance the removal capacity of COD, especially unsymmetrical dimethylhydrazine. Furthermore, the increased water temperature causes unreacted unsymmetrical dimethylhydrazine (UDMH) to volatilize from the wastewater. Therefore, the volatilized UDMH is collected during electron beam irradiation and returned to the electron beam irradiation process until the UDMH is completely removed.

[0046] In some implementation methods, experimental verification has shown that when the electron beam irradiation dose is 10-500 kGy, the temperature of the wastewater to be treated increases by 0-30°C compared to before electron beam irradiation; due to the coupling effect of the oxidant and the indirect effect of electron beam irradiation, the resulting active species achieve a COD removal rate of over 90% in the wastewater to be treated.

[0047] In a second aspect, the present invention provides an electron beam irradiation system for removing unsymmetrical dimethylhydrazine (UDMH), the system being used to perform the electron beam irradiation process for removing UDMH described in the first or second aspect above. Figure 2 A schematic diagram of an electron beam irradiation system for removing unsymmetrical dimethylhydrazine provided in an embodiment of the present invention is shown, as follows: Figure 2 As shown, the system includes: an electron beam irradiation processing unit 1 and a gas collection and delivery unit 2;

[0048] Electron beam irradiation treatment unit 1 is used to treat wastewater containing unsymmetrical dimethylhydrazine by electron beam irradiation; it is equipped with an electron accelerator device to provide electron beam irradiation with a dose of 2-500 kGy; it is also equipped with an oxidant inlet 1-1 for adding oxidant to the electron beam irradiation treatment unit.

[0049] The gas collection and transfer unit 2 collects the gaseous unsymmetrical dimethylhydrazine (UDMH) overflowing from the electron beam irradiation processing unit 1 and returns it to the electron beam irradiation processing unit 1 for irradiation. It is equipped with a gas flow controller 2-1 to automatically regulate the concentration of the returning gaseous UDMH, ensuring that all the UDMH collected by the gas collection and transfer unit 2 returns to the electron beam irradiation processing unit 1 for secondary irradiation. The entire process is fully automated and requires no manual intervention.

[0050] To enable those skilled in the art to better understand the present invention, the following experimental examples will be used to provide a detailed description of the electron beam irradiation process and system for removing unsymmetrical dimethylhydrazine according to the present invention.

[0051] use Figure 2 The system shown (schematic diagram) was validated in the following experimental examples 1-5 for the removal of unsymmetrical dimethylhydrazine.

[0052] Experimental Example 1

[0053] Electron beam irradiation for the removal of unsymmetrical dimethylhydrazine from water

[0054] The concentration of unsymmetrical dimethylhydrazine in the water was 10 mg / L. It was introduced into the electron beam irradiation treatment unit 1 for direct electron beam irradiation treatment. The gas flow controller returned the gas collected in the gas collection and transfer unit 2 to the electron beam irradiation treatment unit 1 at a flow rate of 0.2 L / min. The irradiation dose was 2 kGy. After irradiation, the water temperature increased by 0.1℃ compared with that before irradiation. After treatment, unsymmetrical dimethylhydrazine in the water was completely removed.

[0055] Experimental Example 2

[0056] Electron beam irradiation combined with hydrogen peroxide for the removal of unsymmetrical dimethylhydrazine from water

[0057] The concentration of unsymmetrical dimethylhydrazine in the water was 100 mg / L. 0.8 mM hydrogen peroxide was added and introduced into electron beam irradiation treatment unit 1 for direct electron beam irradiation treatment. The gas flow controller returned the gas collected in gas collection and transmission unit 2 to electron beam irradiation treatment unit 1 at a flow rate of 0.1 L / min. The irradiation dose was 10 kGy. After irradiation, the water temperature increased by 0.5℃ compared with that before irradiation. After treatment, unsymmetrical dimethylhydrazine in the water was completely removed.

[0058] Experimental Example 3

[0059] Removal of unsymmetrical dimethylhydrazine and COD from actual wastewater

[0060] The actual wastewater contained 5 g / L unsymmetrical dimethylhydrazine (UDMH), 7900 mg / L COD, and pH 7.5. 7‰ persulfate was added, and the wastewater was introduced into electron beam irradiation unit 1 for treatment. A gas flow controller returned the gas collected in gas collection and transfer unit 2 to electron beam irradiation unit 1 at a flow rate of 0.2 L / min. Irradiation was performed at 100 kGy. After irradiation, the water temperature increased by 10°C compared to before irradiation. After one cycle, the removal rate of UDMH was 75%, and the COD removal rate was 11.4%. After two cycles, the removal rate of UDMH was 100%, and the COD removal rate was 23.5%. After three cycles, the COD removal rate was 47.4%. After four cycles, the COD removal rate was 73.2%. After five cycles, the COD removal rate was greater than 90%.

[0061] Test Example 4

[0062] Removal of unsymmetrical dimethylhydrazine and COD from actual wastewater

[0063] The actual wastewater contained 50 g / L unsymmetrical dimethylhydrazine (UDMH), 79000 mg / L COD, and pH 8.4. 1.4% hydrogen peroxide was added, and the solution was introduced into electron beam irradiation unit 1 for treatment. A gas flow controller returned the gas collected in gas collection and transfer unit 2 to electron beam irradiation unit 1 at a flow rate of 0.3 L / min. Irradiation was performed at 200 kGy. After irradiation, the water temperature increased by 15°C compared to before irradiation. After one cycle, the removal rate of UDMH was 55%, and the COD removal rate was 4.4%. After two cycles, the removal rate was 77%, and the COD removal rate was 17.5%. After three cycles, the removal rate was 87%, and the COD removal rate was 40.4%. After four cycles, the removal rate was 100%, and the COD removal rate was 63.2%. After seven cycles, the COD removal rate was greater than 90%.

[0064] Experimental Example 5

[0065] Removal of unsymmetrical dimethylhydrazine and COD from actual wastewater

[0066] The actual wastewater contained 5 g / L unsymmetrical dimethylhydrazine (UDMH), 7900 mg / L COD, and pH 7.5. 5‰ persulfate was added, and the wastewater was introduced into electron beam irradiation unit 1 for treatment. A gas flow controller returned the gas collected in gas collection and transfer unit 2 to electron beam irradiation unit 1 at a flow rate of 0.5 L / min. Irradiation was performed at 150 kGy. After irradiation, the water temperature increased by 12°C compared to before irradiation. After one cycle, the removal rate of UDMH was 79%, and the COD removal rate was 16.8%. After two cycles, the removal rate of UDMH was 100%, and the COD removal rate was 30.4%. After three cycles, the COD removal rate was 52.7%. After four cycles, the COD removal rate was 80.7%. After five cycles, the COD removal rate was greater than 90%.

[0067] In summary, this treatment process features good treatment effect, low carbon footprint, and simple operation. Irradiation conditions can be adjusted according to the concentration of unsymmetrical dimethylhydrazine (UDMH) in the wastewater to achieve the goal of UDMH removal. This process can meet the needs of UDMH removal under different circumstances and can achieve excellent purification effects on wastewater containing UDMH.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0069] For the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps can be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and components involved are not necessarily essential to the present invention.

[0070] The electron beam irradiation process and system for removing unsymmetrical dimethylhydrazine provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An electron beam irradiation process for removing unsymmetrical dimethylhydrazine, characterized in that, The process includes: Step 1: Add an oxidant to the wastewater to be treated with a concentration of unsymmetrical dimethylhydrazine (UDMH) of 100-50000 mg / L, and then subject it to electron beam irradiation; wherein the molar ratio of the oxidant to UDMH is 1:1-5. Step 2: Collect the gaseous unsymmetrical dimethylhydrazine that overflows during the electron beam irradiation process; Step 3: Return the gaseous unsymmetrical dimethylhydrazine to the wastewater to be treated for irradiation; Step 4: Repeat steps 2-3 until unsymmetrical dimethylhydrazine in the wastewater to be treated is completely removed; The oxidant is hydrogen peroxide or persulfate; The electron beam irradiation dose is 10-500 kGy; In step 1, the electron beam irradiation is applied to the wastewater to be treated, which raises the temperature of the wastewater. The increased temperature activates the oxidant, converting it into an active substance that can remove COD. When the electron beam irradiation dose is 10-500 kGy, the temperature of the wastewater to be treated increases by 0-30 °C compared to before receiving electron beam irradiation.

2. The electron beam irradiation process for removing unsymmetrical dimethylhydrazine according to claim 1, characterized in that, The repetition is repeated 2-10 times.

3. The electron beam irradiation process for removing unsymmetrical dimethylhydrazine according to claim 1, characterized in that, The electron beam irradiation dose is 100-400 kGy.

4. An electron beam irradiation system for removing unsymmetrical dimethylhydrazine, characterized in that, The system is used to perform the electron beam irradiation process for removing unsymmetrical dimethylhydrazine as described in any one of claims 1-3, and the system includes: an electron beam irradiation processing unit and a gas collection and delivery unit; The electron beam irradiation treatment unit is used to treat wastewater containing unsymmetrical dimethylhydrazine by electron beam irradiation. The gas collection and transfer unit is used to collect the gaseous unsymmetrical dimethylhydrazine that overflows from the electron beam irradiation processing unit; and to return the gaseous unsymmetrical dimethylhydrazine to the electron beam irradiation processing unit for irradiation.

5. The electron beam irradiation system for removing unsymmetrical dimethylhydrazine according to claim 4, characterized in that, The electron beam irradiation processing unit is equipped with an electron accelerator device for providing electron beam irradiation with a dose of 10-500 kGy.

6. The electron beam irradiation system for removing unsymmetrical dimethylhydrazine according to claim 4, characterized in that, The electron beam irradiation processing unit is provided with an oxidant inlet for adding oxidant to the electron beam irradiation processing unit.

7. The electron beam irradiation system for removing unsymmetrical dimethylhydrazine according to claim 4, characterized in that, The gas collection and transmission unit is equipped with a gas flow controller for automatically regulating the concentration of the returned gaseous unsymmetrical dimethylhydrazine.

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