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Application of low-temperature plasma technology in environmental governance

  • Categories:Technical Support
  • Author:plasma cleaning machine-surface treatment equipment-CRF plasma machine-Sing Fung Intelligent Manufacturing
  • Origin:
  • Time of issue:2021-03-11
  • Views:

(Summary description)With the development of economy, the problem of environmental pollution is becoming more and more prominent. Various forms of environmental pollution emerge one after another, seriously endangering human health and survival. To deal with environmental problems is the urgent need of human being's own security. In recent years, there have been many new and high technologies to deal with environmental problems worldwide, such as ultrasonic wave, photocatalytic oxidation, plasma, reverse osmosis, etc., among which, low-temperature plasma technology, as a new environmental protection technology with high efficiency, low consumption, high processing capacity and easy operation, has become a research hotspot at home and abroad in recent years. In the ultrafine powder production, the waste gas processing, metallurgical refining, corrosion and material surface treatment, ozone production and other fields, the low temperature plasma technology has been widely used in industrial applications, with low temperature plasma processing environment governance applied to the study of organic pollutants in waste gas and waste water, but this aspect of the current techniques are not mature industrialized scale. 1. Definition and characteristics of low-temperature plasma. Plasma is a kind of ionized gas with ionization degree greater than 0.1% and equal positive and negative charges. It is composed of electrons, ions, neutral atoms, excited state atoms, photons and free radicals. The number of charges of electrons and positive ions is equal. Generally, it is electrically neutral, which is different from the three states of matter (solid, liquid and gas), and it is the fourth form of material existence. Its main features are: (1) There is no net Coulomb force between charged particles; (2) is an excellent conductive fluid, using this characteristic can produce magnetic fluid power generation; (3) Charged particles without net magnetic force; (4) Ionized gas has a certain influence on temperature. It is generally believed that low temperature plasma equipment can be divided into high temperature plasma and low temperature plasma according to the energy state, temperature and ion density of the system. The ionization degree of the former type is close to 1, the temperature of each particle is basically the same, the system is in a thermodynamic unbalanced state, the temperature is generally more than 5×104K, and it is mainly used to study the controlled thermonuclear reaction. The latter kind of particles have different temperatures, the temperature of electrons is much higher than that of ions, the system is in a thermodynamic unbalanced state, and the macroscopic temperature is low. Generally, the plasma generated by gas discharge belongs to this kind, which is closely related to modern industrial production. 2. Low-temperature plasma pollution reduction mechanism, the energy transfer of plasma surface processor in the process of plasma chemical reaction, the energy transfer of plasma chemical reaction is roughly as follows: (1) Combination of electric field + electron → high-energy electron; (2) high energy electron + molecule (or atom)→ active group (excited atom, excited group, free group); (3) active group + molecule (atom)→ product + heat; (4) active group + active group → product + heat. From the above process, it can be seen that electrons obtain energy from the electric field, and the molecules or atoms that obtain energy are excited, and the energy is transferred to the molecules or atoms through excitation or ionization. At the same time, some molecules are ionized to form active groups. These active groups then collide with molecules or atoms, active groups and active groups to produce a stable product and heat. In addition, the electrons of halogen and oxygen can also be compatible with high-energy electrons.

Application of low-temperature plasma technology in environmental governance

(Summary description)With the development of economy, the problem of environmental pollution is becoming more and more prominent. Various forms of environmental pollution emerge one after another, seriously endangering human health and survival. To deal with environmental problems is the urgent need of human being's own security. In recent years, there have been many new and high technologies to deal with environmental problems worldwide, such as ultrasonic wave, photocatalytic oxidation, plasma, reverse osmosis, etc., among which, low-temperature plasma technology, as a new environmental protection technology with high efficiency, low consumption, high processing capacity and easy operation, has become a research hotspot at home and abroad in recent years.


In the ultrafine powder production, the waste gas processing, metallurgical refining, corrosion and material surface treatment, ozone production and other fields, the low temperature plasma technology has been widely used in industrial applications, with low temperature plasma processing environment governance applied to the study of organic pollutants in waste gas and waste water, but this aspect of the current techniques are not mature industrialized scale.


1. Definition and characteristics of low-temperature plasma. Plasma is a kind of ionized gas with ionization degree greater than 0.1% and equal positive and negative charges. It is composed of electrons, ions, neutral atoms, excited state atoms, photons and free radicals. The number of charges of electrons and positive ions is equal. Generally, it is electrically neutral, which is different from the three states of matter (solid, liquid and gas), and it is the fourth form of material existence.


Its main features are:
(1) There is no net Coulomb force between charged particles;
(2) is an excellent conductive fluid, using this characteristic can produce magnetic fluid power generation;
(3) Charged particles without net magnetic force;
(4) Ionized gas has a certain influence on temperature.


It is generally believed that low temperature plasma equipment can be divided into high temperature plasma and low temperature plasma according to the energy state, temperature and ion density of the system. The ionization degree of the former type is close to 1, the temperature of each particle is basically the same, the system is in a thermodynamic unbalanced state, the temperature is generally more than 5×104K, and it is mainly used to study the controlled thermonuclear reaction. The latter kind of particles have different temperatures, the temperature of electrons is much higher than that of ions, the system is in a thermodynamic unbalanced state, and the macroscopic temperature is low. Generally, the plasma generated by gas discharge belongs to this kind, which is closely related to modern industrial production.


2. Low-temperature plasma pollution reduction mechanism, the energy transfer of plasma surface processor in the process of plasma chemical reaction, the energy transfer of plasma chemical reaction is roughly as follows:
(1) Combination of electric field + electron → high-energy electron;
(2) high energy electron + molecule (or atom)→ active group (excited atom, excited group, free group);
(3) active group + molecule (atom)→ product + heat;
(4) active group + active group → product + heat.


From the above process, it can be seen that electrons obtain energy from the electric field, and the molecules or atoms that obtain energy are excited, and the energy is transferred to the molecules or atoms through excitation or ionization. At the same time, some molecules are ionized to form active groups. These active groups then collide with molecules or atoms, active groups and active groups to produce a stable product and heat. In addition, the electrons of halogen and oxygen can also be compatible with high-energy electrons.

  • Categories:Technical Support
  • Author:plasma cleaning machine-surface treatment equipment-CRF plasma machine-Sing Fung Intelligent Manufacturing
  • Origin:
  • Time of issue:2021-03-11 09:18
  • Views:
Information

Application of low-temperature plasma technology in environmental governance:

With the development of economy, the problem of environmental pollution is becoming more and more prominent. Various forms of environmental pollution emerge one after another, seriously endangering human health and survival. To deal with environmental problems is the urgent need of human being's own security. In recent years, there have been many new and high technologies to deal with environmental problems worldwide, such as ultrasonic wave, photocatalytic oxidation, plasma, reverse osmosis, etc., among which, low-temperature plasma technology, as a new environmental protection technology with high efficiency, low consumption, high processing capacity and easy operation, has become a research hotspot at home and abroad in recent years.

CRF low-temperature plasma technology
In the ultrafine powder production, the waste gas processing, metallurgical refining, corrosion and material surface treatment, ozone production and other fields, the low temperature plasma technology has been widely used in industrial applications, with low temperature plasma processing environment governance applied to the study of organic pollutants in waste gas and waste water, but this aspect of the current techniques are not mature industrialized scale.


1. Definition and characteristics of low-temperature plasma. Plasma is a kind of ionized gas with ionization degree greater than 0.1% and equal positive and negative charges. It is composed of electrons, ions, neutral atoms, excited state atoms, photons and free radicals. The number of charges of electrons and positive ions is equal. Generally, it is electrically neutral, which is different from the three states of matter (solid, liquid and gas), and it is the fourth form of material existence.


Its main features are:
(1) There is no net Coulomb force between charged particles;
(2) is an excellent conductive fluid, using this characteristic can produce magnetic fluid power generation;
(3) Charged particles without net magnetic force;
(4) Ionized gas has a certain influence on temperature.


It is generally believed that low temperature plasma equipment can be divided into high temperature plasma and low temperature plasma according to the energy state, temperature and ion density of the system. The ionization degree of the former type is close to 1, the temperature of each particle is basically the same, the system is in a thermodynamic unbalanced state, the temperature is generally more than 5×104K, and it is mainly used to study the controlled thermonuclear reaction. The latter kind of particles have different temperatures, the temperature of electrons is much higher than that of ions, the system is in a thermodynamic unbalanced state, and the macroscopic temperature is low. Generally, the plasma generated by gas discharge belongs to this kind, which is closely related to modern industrial production.


2. Low-temperature plasma pollution reduction mechanism, the energy transfer of plasma surface processor in the process of plasma chemical reaction, the energy transfer of plasma chemical reaction is roughly as follows:
(1) Combination of electric field + electron → high-energy electron;
(2) high energy electron + molecule (or atom)→ active group (excited atom, excited group, free group);
(3) active group + molecule (atom)→ product + heat;
(4) active group + active group → product + heat.


From the above process, it can be seen that electrons obtain energy from the electric field, and the molecules or atoms that obtain energy are excited, and the energy is transferred to the molecules or atoms through excitation or ionization. At the same time, some molecules are ionized to form active groups. These active groups then collide with molecules or atoms, active groups and active groups to produce a stable product and heat. In addition, the electrons of halogen and oxygen can also be compatible with high-energy electrons.

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