System for ionizing a process gas, use thereof and method

Abstract

The application provides a system for ionizing a gas, and an application and method thereof. The system for ionizing a gas comprises at least two electric field ionization units arranged along a flow direction of the gas. The electric field ionization units are used for ionizing the gas by generating an electric field. After one electric field ionization unit ionizes the gas, the ionization environment of an electric field ionization unit adjacent to the one electric field ionization unit and downstream of the one electric field ionization unit is changed.

Description

Technical Field

[0001] This invention relates to a system for ionizing and treating gases, its applications, and methods. Background Technology

[0002] When a gas is subjected to an electric field or thermal energy, the electrons in the neutral gas atoms will gain enough energy to overcome the attraction of the atomic nucleus and become free electrons. At the same time, the neutral atoms or molecules will become positive ions due to the loss of negatively charged electrons. This process of neutral gas molecules or atoms releasing electrons to form positive ions is called gas ionization.

[0003] Based on the above, different gas components have different ionization energies. Theoretically, the ionization energies of different gas components can be used to selectively break the bond energies of some gas components through the action of an electric field, thereby removing these gas components from the gas.

[0004] However, in reality, the method of removing gas components by ionizing gases using different ionization energies is not actually applied. For example, pollutants such as automobile emissions and some industrial emissions often contain harmful substances such as CO and VOCs. Currently, gases containing these harmful gas components are generally treated by chemical, physical adsorption, and combustion heating. Gas ionization is generally used in electrostatic dust removal to charge dust particles, which are then separated from the airflow under the action of an electric field, thereby removing dust particles mixed in with pollutants. Summary of the Invention

[0005] This invention provides a system for ionizing gas, its application, and a method thereof. By ionizing the gas in stages, the ionization environment of the next ionization process is changed after the previous ionization process, thereby enabling the next ionization process to effectively ionize substances with different compositions. These other compositions refer to substances with compositions different from those targeted in the previous ionization process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] One object of the present invention is to provide a system for ionizing gas for performing multiple ionization treatments on the gas, comprising: at least two electric field ionization units arranged along the gas flow direction, wherein the electric field ionization units use the generated electric fields to ionize the gas, and after one electric field ionization unit ionizes the gas, the ionization environment of the electric field ionization unit adjacent to and downstream of the first electric field ionization unit is changed, preferably, the changed ionization environment includes at least a change in the gas components and / or the content of the gas components.

[0008] The system provided by the present invention also has the following features: wherein each electric field ionization unit is used to ionize different material compositions.

[0009] The system provided by the present invention also has the following features: wherein there are two electric field ionization units, the gas contains two gas components, O2 and CO, the electric field ionization unit located upstream of the gas direction is used to ionize O2, and the electric field ionization unit located downstream of the gas direction is used to ionize CO.

[0010] The system provided by the present invention also has the following features: wherein the electric field ionization unit has: a gas inlet for the gas to be ionized to enter; a processing chamber for receiving and containing the gas entering from the gas inlet; two electrodes for generating an electric field in the processing chamber to ionize the gas entering the processing chamber; and a gas outlet for the gas after ionization to be discharged from the processing chamber.

[0011] The system provided by the present invention also has the following features: one of the two electrodes is provided with a dielectric barrier electrode, which is used to generate dielectric barrier discharge and form an electric field with the other electrode.

[0012] The system provided by the present invention also has the following features, further comprising: a first removal device, wherein at least one first removal device is disposed between at least one pair of adjacent electric field ionization units along the gas flow direction, the first removal device being used to perform a first removal process on a first specific substance in the gas after ionization treatment of the upstream electric field ionization unit of the two electric field ionization units, wherein the first specific substance includes at least the following substance: the substance is detrimental to the processing efficiency and / or processing energy consumption of the downstream electric field ionization unit of the pair of adjacent electric field ionization units.

[0013] The system provided by the present invention also has the following features, further comprising: a second removal device, at least one of which is disposed after the downstream electric field ionization unit, for performing a second removal treatment on a second specific substance in the gas after ionization treatment by the electric field ionization unit, wherein the second removed substance includes a harmful substance.

[0014] The system provided by the present invention also has the following features, further comprising: a particulate matter removal device disposed before at least one electric field ionization unit, for performing particulate matter removal treatment on the gas before it enters the electric field ionization unit.

[0015] The system provided by the present invention also has the following features, further comprising: a water removal device, disposed before at least one electric field ionization unit, for removing water from the gas before it enters the electric field ionization unit or the particulate matter removal device.

[0016] The system provided by the present invention also has the following features, including: a control unit, used to control each electric field ionization unit to perform ionization processing according to the set ionization parameters.

[0017] The system provided by the present invention also has the following features: the control unit includes a gas component detection module and a control module. The gas component detection module is used to detect the gas conditions, including the gas components and component content, before and / or after the ionization treatment of each electric field ionization unit. The control module controls and sets the ionization parameters of each electric field ionization unit according to the gas conditions detected by the detection unit, and controls each electric field ionization unit to perform ionization treatment according to its corresponding ionization parameters.

[0018] The present invention also provides an application of a gas ionization treatment system in the treatment of waste gas, characterized in that: the gas ionization treatment system is the system described above.

[0019] The present invention also provides a method for processing gas, characterized in that it includes: performing at least two ionization treatments on the gas, wherein the ionization environment for the next ionization treatment is changed by performing the previous ionization treatment on the gas.

[0020] The method provided by the present invention also has the following characteristics: wherein the altered ionization environment includes at least alterations to the gas components and / or the content of the gas components contained in the gas.

[0021] The method provided by the present invention also has the following characteristics: wherein different ionization treatments are used to ionize different material compositions.

[0022] The method provided by the present invention also has the following features: the ionization treatment is performed twice, the gas contains two gas components, O2 and CO, the first ionization treatment is used to ionize O2, and the second ionization treatment is used to ionize CO.

[0023] The method provided by the present invention also has the following features, further comprising: a first removal process, wherein at least one first removal process is performed between two ionization processes that are adjacent in the ionization process sequence, the at least one first removal process being used to remove a first specific substance from the gas after the previous electric field treatment in the two ionization processes, wherein the first specific substance includes at least the following substances: such substances are detrimental to the processing efficiency and / or processing energy consumption of the next ionization process in the two ionization processes that are adjacent in the ionization process sequence.

[0024] The method provided by the present invention also has the following features, further comprising: a second removal process, wherein at least one second removal process is performed after the last ionization process, the at least one second removal process being used to remove a second specific substance from the gas after the last ionization process, wherein the second specific substance includes a harmful substance.

[0025] The method provided by the present invention also has the following features, further including: particulate matter removal treatment, wherein the gas is subjected to particulate matter removal treatment before being subjected to at least two ionization treatments.

[0026] The method provided by the present invention also has the following features, further including: water removal treatment, wherein the gas is subjected to water removal treatment before being treated at least twice.

[0027] The system, application, and method for ionizing gases provided by this invention ionize the gas in stages, thereby changing the ionization environment for the next ionization process after each ionization. In particular, the changed ionization environment includes at least changes to the gas components and / or the content of gas components, enabling the next ionization process to effectively ionize other substances. Therefore, based on one or more of the gas components, gas component content, humidity, and temperature in the gas to be treated, ionization processes can be performed along the gas flow under different suitable gas conditions, so that the next ionization process can effectively ionize other substances after the previous ionization process. More preferably, it can achieve truly effective ionization of gas components that are different from the gas components targeted in the previous ionization process. Attached Figure Description

[0028] Figure 1 This is a schematic structural block diagram of the gas ionization treatment system involved in the present invention;

[0029] Figure 2 This is a schematic diagram of the electric field ionization unit involved in the present invention. Detailed Implementation

[0030] The specific embodiments of the present invention are described below.

[0031] Unless otherwise specified, the methods used in the following examples are conventional methods; the materials and reagents used are commercially available unless otherwise specified.

[0032] The following embodiments are for the purpose of illustrating the system for ionizing and treating gases, its application, and the method thereof, which are related to the present invention.

[0033] In the following embodiments, the gas direction refers to the direction from receiving gas, to processing gas, and then to gas discharge. Upstream means relatively close to receiving gas in the gas direction, and downstream means relatively close to gas discharge in the gas direction.

[0034] The gas in this application includes gases with at least two gaseous components, such as gases produced from the combustion of hydrocarbons, such as exhaust gases from the combustion of crop straw and domestic waste, vehicle and ship exhaust gases, exhaust gases from power plant boilers and steel plant sintering machines, welding exhaust gases, paint exhaust gases, chemical plant exhaust gases, oil refinery exhaust gases, etc.

[0035] The gaseous components in this application refer to various substances contained in the gas, such as common gas molecules like CO (carbon monoxide) and O2 (oxygen), as well as oxygen ions and water vapor.

[0036] The content of gas components refers to the amount of a certain substance in a gas, such as the mass concentration, volume concentration, or molar concentration of O2, or the mass percentage, volume percentage, or molar ratio of O2.

[0037] Different material compositions refer to the different gas components and their contents. For example, material composition (1) contains 5% A, 20% B, and 75% C; material composition (2) contains 50% E and 50% F; material composition (3) contains 5% A and 95% B; material composition (4) contains 5% A and 95% G; material composition (5) contains 5% A, 20% B, 70% C, and 5% H; and material composition (6) contains 15% A, 10% B, and 75% C.

[0038] Therefore, the above-mentioned material composition (1), material composition (2), material composition (3), material composition (4), material composition (5) and material composition (6) are all different from each other.

[0039] Example

[0040] The present invention provides a system for ionizing gas, which ionizes the gas in stages, thereby changing the ionization environment of the next ionization process after the previous ionization process, so that the next ionization process can achieve ionization of other gas components.

[0041] Figure 1 This is a schematic block diagram of the gas ionization treatment system involved in the present invention.

[0042] Specifically, such as Figure 1As shown, the gas ionization treatment system 100 provided by the present invention is used to perform multi-stage ionization treatment on gas, including: at least two electric field ionization units 10 arranged along the gas flow direction.

[0043] The electric field ionization unit 10 generates an electric field, that is, generates ionization energy, which is then used to ionize the gas.

[0044] Figure 2 This is a schematic diagram of the electric field ionization unit involved in the present invention.

[0045] like Figure 2 As shown, in one example, the electric field ionization unit 10 of the present invention has a gas inlet 11 for the gas to be ionized to enter, a processing chamber 12 for receiving and accommodating the entering gas, two electrodes 13a and 13b for generating an electric field in the processing chamber 12 to ionize the gas, and a gas outlet 14 for discharging the ionized gas. The two electrodes 13a and 13b are respectively connected to the positive and negative terminals of a power supply. In this embodiment, the processing chamber 12 is electrode 13b.

[0046] One of the two electrodes 13a and 13b, for example, electrode 13a can be an electrode with a barrier dielectric, generates a dielectric barrier discharge, and at this time forms a dielectric barrier electric field with the other electrode 13b.

[0047] The barrier medium includes, but is not limited to, one of the following: an insulating medium or a gas. The insulating medium includes, but is not limited to, at least one of the following: ceramics, quartz, Teflon coating, enamel, mica, glass, etc.

[0048] In one embodiment of the present invention, when there is no insulating medium as the electrode blocking medium, a gas is used as the electrode blocking medium, and the electric field discharge electrode discharge is in the gas.

[0049] In one example, the electric field ionization unit is powered by a high-voltage power supply.

[0050] In one example, the power supply for the electric field ionization unit is a high-frequency, high-voltage AC power supply.

[0051] In one example, the power supply for the electric field ionization unit is a DC power supply.

[0052] Figure 1In the diagram, the arrows indicate the direction of gas flow. There are two electric field ionization units 10. For ease of distinction and description, the first electric field ionization unit is labeled as 10a, and the electric field ionization unit adjacent to and downstream of the first electric field ionization unit 10a is labeled as 10b. Along the gas direction, the ionization process performed by the electric field ionization unit 10a relative to the ionization process performed by the electric field ionization unit 10b is called the previous ionization process, and the ionization process performed by the electric field ionization unit 10b is the next ionization process.

[0053] In this invention, after an electric field ionization unit 10 performs ionization treatment, the ionization environment of the electric field ionization unit 10 adjacent to and downstream of the electric field ionization unit 10 is changed. The ionization environment in this invention refers to the gas conditions to be treated under electric field ionization conditions, including but not limited to the components, component content (e.g., oxygen content, ion concentration), humidity, and temperature of the gas to be treated. Preferably, the changed ionization environment includes at least a change in the gas components and / or the content of those components.

[0054] Specifically, such as Figure 1 As shown: After the gas is ionized by the electric field ionization unit 10a (the previous ionization treatment), one or more of the following gas conditions of the gas are changed: gas composition, component content (e.g., oxygen content, ion concentration), humidity, and temperature. As a result, the gas conditions of the gas to be ionized by the electric field ionization unit 10b (the next ionization treatment) are different from those of the gas to be ionized by the electric field ionization unit 10a. In other words, the gas conditions are changed.

[0055] Therefore, based on one or more of the gas components, humidity, and temperature contained in the gas to be treated, various electric field ionization units 10, each suitable for different gas conditions, can be configured along the gas flow. This ensures that after each ionization process, the next ionization process can effectively ionize other gas components. For example, when the gas components contain O2 and CO, if CO is to be removed by ionization, conventional techniques would be insufficient to effectively ionize CO by ionizing it from the outset. However, the applicant has discovered that if ionization is performed in two stages, with the first stage targeting O2, at least most of the O2 will be removed. This changes the gas conditions for the next ionization process, allowing the next ionization process to effectively ionize CO. Similarly, if water is generated during the previous ionization process, the humidity in the gas conditions is also altered, requiring the ionization unit 10 to operate under gas conditions suitable for the changed humidity for the next ionization process.

[0056] In one example, each electric field ionization unit 10 is used to ionize different material components. To this end, the structure (e.g., the effective length of the electrode for discharge), ionization parameters, etc., of each electric field ionization unit 10 are configured to ionize different material components. For example, in this embodiment, electric field ionization unit 10a is configured to mainly ionize materials composed of O2, while electric field ionization unit 10b is configured to mainly ionize materials composed of CO. In this way, by targeting different material components for each ionization treatment, the composition (e.g., O2 has been removed in the previous ionization treatment) or component content (e.g., gas component content, ion concentration, for example, the concentration of O2 is extremely low in the next ionization treatment) of the gas in the next ionization treatment is changed after the previous ionization treatment. This allows the ionization treatment of a different gas component than the previous ionization treatment to be achieved in the next ionization treatment. For example, in this embodiment, this is achieved so that the previous ionization treatment was for O2, and the next ionization treatment is for CO. Here, each ionization treatment targets only one gaseous component in the material composition. However, in practice, depending on the gas components, their concentrations, humidity, temperature, and ionization energy, some ionization treatments may target multiple gaseous components simultaneously, or even treat the same gaseous components at the same time. Sometimes, the difference between different ionization treatments lies solely in the concentration of gaseous components. For example, one ionization treatment might simultaneously ionize 10% oxygen and 60% nitrogen, while another might ionize 15% oxygen and 5% nitrogen. In short, all the aforementioned material compositions are possible; the appropriate treatment should be chosen based on the specific circumstances. These will not be listed exhaustively here.

[0057] In addition, the gas ionization treatment system 100 of this embodiment further includes: a first removal device 20. At least one removal device is disposed between at least one pair of adjacent electric field ionization units 10 along the gas flow direction. In this embodiment, there is one first removal device 20, which is disposed between electric field ionization unit 10a and electric field ionization unit 10b.

[0058] The first removal device 10 is used to perform a first removal process on a first specific substance in the gas after ionization treatment by the upstream electric field ionization unit 10 of the two electric field ionization units 10. The first specific substance includes at least the following substances: substances that are detrimental to the processing efficiency and / or processing energy consumption of the downstream electric field ionization unit of a pair of adjacent electric field ionization units. Processing efficiency refers to the amount of a gas component that can be effectively ionized, for example, CO that can be effectively ionized by 95%; processing energy consumption refers to the electrical power required for ionization treatment, for example, 18 kW of electrical power.

[0059] The primary removal methods can be physical or chemical. Physical methods include, but are not limited to: molecular sieve adsorption, electroadsorption, membrane filtration, stratified sieving, pressure swing phase separation, temperature swing phase separation, dissolution, and adhesion precipitation. Chemical methods include, but are not limited to: neutralization reactions, water dissolution reactions, catalysis, polymerization reactions, complexation reactions, oxidation consumption, decomposition consumption, pyrolysis reactions, photolysis reactions, and electrolysis reactions. Specifically, the appropriate method should be selected based on the characteristics of the components of the substance to be removed.

[0060] Taking this embodiment as an example, the first removal device 20 removes a first specific substance contained in the gas after the ionization treatment of the electric field ionization unit 10a. The first specific substance includes at least the following substances: substances that are detrimental to the ionization efficiency and / or energy consumption of the electric field ionization unit 10b located downstream of and adjacent to the electric field ionization unit 10a. In other words, substances present in the gas after the previous ionization treatment that are detrimental to the subsequent ionization treatment are removed. The removal method can be water washing.

[0061] For example, in this embodiment, when ionizing a gas containing both O2 and CO, the ionization of O2 by the electric field ionization unit 10a will generate a large amount of ozone. To avoid the impact of the generated ozone on the processing efficiency and / or energy consumption of the electric field ionization unit 10b, a first removal device 20 is set between the two electric field ionization units 10a and 10b. The O3 (ozone) in the gas after ionization by the ionization unit 10a is removed by water washing. The gas after O3 removal then enters the electric field ionization unit 10b for the next ionization process. In this way, since the O3 in the gas is removed before the next ionization process by the electric field ionization unit 10b, the CO can be ionized more effectively in the next ionization process.

[0062] In addition, the gas ionization treatment system 100 of this embodiment further includes: a second removal device 30. At least one second removal device is disposed after the downstream electric field ionization unit and is used to perform a second removal treatment on a second specific substance in the gas after ionization treatment by the electric field ionization unit. The second removed substance includes harmful substances. The downstream means that the electric field ionization unit is the last one in the gas flow of the entire gas ionization treatment system.

[0063] Similarly, the second removal treatment can be a physical method or a chemical method. Physical methods include, but are not limited to: molecular sieve adsorption, electroadsorption, membrane filtration, stratified sieving, pressure swing phase separation, temperature swing phase separation, dissolution, adhesion precipitation, etc. Chemical methods include, but are not limited to: neutralization reaction, water dissolution reaction, catalysis, polymerization reaction, complexation reaction, oxidation consumption, decomposition consumption, pyrolysis reaction, photolysis reaction, and electrolysis reaction, etc. Likewise, in practice, the appropriate method is selected based on the characteristics of the components of the substance to be removed.

[0064] Taking this embodiment as an example, a second removal device 30 is provided, which is located after the last (i.e., the most downstream) electric field ionization unit 10b, and is used to remove a second specific substance from the gas after the ionization treatment of the electric field ionization unit 10b (the last ionization treatment). For example, after the electric field ionization unit 10b ionizes CO, it also produces some O3. If it needs to be released into the air, in order to avoid O3 pollution to the environment, it can be removed by water washing through the second removal device 30.

[0065] In addition, in this embodiment, when the first and second removal processes are carried out by water washing, the water can be the reaction condensate on the wall of the electric field ionization unit 10 component, or it can be the external water or water-containing agent provided by the first or second removal device.

[0066] In addition, the gas ionization treatment system 100 of this embodiment also includes a control unit 40. The control unit is connected to an external power supply and is used to control each electric field ionization unit to perform ionization treatment according to the set ionization parameters, thereby effectively ensuring the efficiency of each electric field ionization unit. Ionization parameters refer to parameters related to ionization itself, such as the voltage, current, and power of the electric field. The ionization parameters can be set according to the specific voltage, current, or power required to ionize a gas component at a certain concentration in practice. That is, a certain concentration of gas component can be set with corresponding ionization parameters.

[0067] The control unit 40 includes a control module 42 electrically connected to a gas component detection module 41. The gas component detection module 41 is used to detect the gas conditions, including the content of gas components, before and / or after ionization treatment by each electric field ionization unit 10. For example, it detects the gas components contained in the gas before ionization treatment by the electric field ionization unit 10a. In this embodiment, for example, it detects the presence of O2 and CO. Specifically, it examines the detected O2 content and adjusts the ionization parameters of the electric field ionization unit 10a according to the O2 content to reach the set ionization parameters. For example, if the O2 content is too high, exceeding a certain concentration, the voltage of the electric field is increased to reach the corresponding set parameters so that the electric field ionization unit 10a can effectively ionize O2.

[0068] In addition, in this embodiment, the gas ionization treatment system 100 also includes a particulate matter removal device 50, which is used to remove dust and other particulate matter from the gas before it enters the electric field ionization unit 10.

[0069] In addition, in this embodiment, the gas ionization treatment system 100 also includes a water removal device 60, which is used to remove water from the gas before it enters the electric field ionization unit, mainly to remove condensate from the gas and prevent condensate from entering the electric field ionization unit 10 and causing a short circuit. Specifically, in this embodiment, the water removal device 60 is disposed between the particulate matter removal device 50 and the water removal device 60.

[0070] As can be seen from the above, since the target substance can be effectively treated through the above-mentioned ionization process, the gas ionization treatment system 100 provided in this embodiment can also be applied to waste gas treatment.

[0071] This embodiment also provides a method for treating gas. The method will be specifically described below in conjunction with the aforementioned gas ionization treatment system 100, including:

[0072] The gas is subjected to at least two ionization treatments, wherein the ionization environment for the next ionization treatment is altered by performing the previous ionization treatment. Preferably, the altered ionization environment includes at least a change in the gas components and / or the content of the gas components.

[0073] In addition, the method provided in this embodiment, as described above, uses different ionization processes to ionize different material compositions.

[0074] In another example, the method includes two ionization processes, and the gas to be ionized contains two gaseous components, O2 and CO. Similarly, as above, the first ionization process is used to ionize O2, and the second ionization process is used to ionize CO.

[0075] In addition, the method further includes: a first removal process, wherein at least one first removal process is performed between two ionization processes that are adjacent in the ionization process sequence, and the at least one first removal process is used to remove the first specific substance as described above from the gas after the previous electric field treatment in the two ionization processes, that is, the first specific substance includes at least the following substances: the substance is detrimental to the processing efficiency and / or processing energy consumption of the next ionization process in two ionization processes that are adjacent in the ionization process sequence.

[0076] In addition, the method further includes: a second removal process, wherein at least one second removal process is performed after the final ionization process to remove the second specific substance as described above from the gas after the final ionization process, such as a harmful substance.

[0077] In addition, the method further includes a particulate matter removal process, wherein the gas is subjected to the particulate matter removal process described above before being subjected to at least two ionization processes.

[0078] In addition, the method further includes a water removal treatment, wherein the gas is subjected to the aforementioned water removal treatment before undergoing at least two treatments. Specifically, in this embodiment, the water removal treatment is performed after the particulate matter removal treatment and before the ionization treatment.

[0079] Experimental Example

[0080] In this experiment, the gas containing O2 and CO was ionized using dielectric barrier discharge and without dielectric barrier discharge respectively, and the results were verified in practice. The electric field structure parameters, ionization parameters and results are shown in Table 1.

[0081]

[0082] In Table 1, the electrode spacing refers to the vertical distance between the working surfaces of the two electrodes.

[0083] The effective length of the discharge electrode refers to the length of the effective discharge of one of the two electrodes.

[0084] As can be seen from Table 1, in the two treatment groups:

[0085] After the previous ionization treatment ionized the O2 in the gas, both groups produced O3;

[0086] After the O3 generated in the previous ionization treatment was removed by washing with water, the next ionization treatment was performed. After the treatment, the products of both groups were tested and showed that CO was removed. It can be seen that after the previous ionization treatment of O2, the next ionization treatment can effectively ionize CO, thereby effectively removing CO. In contrast, in the existing technology, if CO is directly ionized, the result of the ionization treatment is often mainly the ionization of O2.

[0087] For the second group, O3 was generated again, presumably because O3 was generated again during the dielectric barrier discharge. In this case, a second removal treatment can be performed by washing with water to remove the O3 before discharge.

[0088] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A system for ionizing a gas, used for performing multiple ionization treatments on the gas, comprising: Two electric field ionization units arranged along the gas flow direction. The electric field ionization unit generates an electric field to ionize the gas. After the electric field ionization unit located upstream of the gas direction performs the ionization treatment on the gas, it changes the ionization environment of the electric field ionization unit located downstream of the electric field ionization unit that performs the ionization treatment. Each of the electric field ionization units is used to perform the ionization treatment on different material compositions; The gas contains two gaseous components: O2 and CO. The electric field ionization unit, located upstream of the gas flow direction, is used to perform the ionization treatment on O2. The electric field ionization unit, located downstream of the gas flow direction, is used to perform the ionization treatment on CO; A first removal device is provided between the two electric field ionization units. The first removal device is used to remove ozone from the gas after ionization treatment by the electric field ionization unit located upstream of the gas direction.

2. The system according to claim 1, Its features are: in, The electric field ionization unit has: A gas inlet is provided for the gas to be subjected to the ionization process. The processing chamber receives and contains the gas entering from the gas inlet; Two electrodes are used to generate the electric field within the processing chamber to perform the ionization treatment on the gas entering the processing chamber; And a gas outlet, from which the gas after the ionization treatment is discharged from the treatment chamber.

3. The system according to claim 2, characterized in that: in, One of the two electrodes is provided with a barrier dielectric to generate a dielectric barrier discharge and form the electric field with the other electrode.

4. The system according to claim 1, characterized in that, Also includes: A second removal device, at least one of which is disposed downstream of the electric field ionization unit, is used to perform a second removal treatment on a second specific substance in the gas after the ionization treatment of the electric field ionization unit.

5. The system according to claim 1, characterized in that, It also includes a particulate matter removal device, which is located upstream of the electric field ionization unit in the direction of the gas flow, for removing particulate matter from the gas before it enters the electric field ionization unit.

6. The system according to claim 1, characterized in that, Also includes: A water removal device is installed upstream of the electric field ionization unit to remove water from the gas before it enters the electric field ionization unit.

7. The system according to any one of claims 1, characterized in that, Also includes: The control unit is used to control each of the electric field ionization units to perform the ionization process according to the set ionization parameters.

8. The system according to claim 7, characterized in that, The control unit includes a gas component detection module and a control module. The gas component detection module is used to detect the gas conditions, including the gas components and component content, before and / or after the ionization treatment of each electric field ionization unit. The control module controls and sets the ionization parameters of each electric field ionization unit according to the gas conditions detected by the detection module, and controls each electric field ionization unit to perform the ionization process according to its respective ionization parameters.

9. The application of a gas ionization treatment system in waste gas treatment, characterized in that: in, The system for ionizing and treating the gas is the system described in any one of claims 1-8.

10. A method for treating a gas, characterized in that, include: The gas is subjected to two ionization treatments. Specifically, by performing the previous ionization treatment on the gas, the ionization environment for the next ionization treatment is changed; The gas contains two gaseous components: O2 and CO2. The previous ionization treatment was used to ionize O2. The next ionization process is used to ionize CO2; At least one first removal process is performed between the two ionization processes to remove ozone from the gas after the previous ionization process.

11. The method according to claim 10, characterized in that: in, The altered ionization environment includes at least a change in the gaseous components and / or the content of those components.

12. The method according to claim 10, characterized in that, Also includes: The second removal process is performed at least once more after the next ionization treatment. At least one of the second removal processes is used to remove a second specific substance from the gas after the next ionization process.

13. The method according to claim 10, characterized in that, Also includes: Particulate matter removal treatment: The gas is subjected to particulate matter removal treatment before the previous ionization treatment is performed on the gas.

14. The method according to claim 10, characterized in that, Also includes: The gas undergoes a dehydration treatment before the previous ionization treatment.

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