Low temperature plasma purifier, also known as low-temperature plasma exhaust gas purifier. This process consists of three independent and hybrid excitation systems: microwave excitation zone, plasma excitation zone, and electrode excitation zone. Each excitation zone has its specific function, but in principle it shares similarities.

1. Microwave excitation zone of low-temperature plasma purifier

This process has 3 to 9 microwave excitation units. Depending on the amount of air being processed, the microwave, due to its relatively high frequency, effectively acts on the processed space (area) in nanoseconds. Due to the relatively small power of the microwave, its excitation ability, that is, the electron's ability to acquire energy and transition, is limited. This design only uses the microwave as the initial frequency excitation source and as a pre excitation energy during the processing. Due to the pre excitation function of microwaves, the excitation ability and processing effect of the plasma and electrode regions are greatly improved. With the application of microwave technology, this process appears refined and superior in comparison to similar equipment.

2. Low temperature plasma purifier ion excitation

This process consists of a low-temperature plasma excitation zone composed of 40 to 240 non-polar tubes filled with special gases. This process uses a low-pressure non-polar lamp as the excitation body for the low-temperature plasma, maximizing the achievement of the low-temperature plasma zone in the non-polar tube zone. Due to the strong energy balance of the low-temperature plasma during energy transition, it loses very little energy in particle impact.

3. Low temperature plasma purifier plate area

According to the flow rate of the processed gas, the voltage between the plates is divided into 12KV, 16KV, and 42KV. A sufficiently high voltage is applied between the plates. Under the action of induced draft, due to the negative pressure in the polar region, according to Faraday's dark zone theory, photoionization theory, and free ionization theory, there is a considerable probability that particles may achieve low-temperature plasma under normal or near normal pressure conditions.

According to the three types of functional zones, the centralized purpose is to achieve low-temperature plasma. Due to the differences in theoretical and practical usage conditions, a single method for obtaining low-temperature plasma has differences in power and external conditions. This process integrates three technologies, and the removal rate of raw waste gas is very ideal. The removal rate of high concentration waste gas can reach over 84%.

The electrocatalytic oxidation process integrates low-temperature plasma, microwave discharge, and electrode discharge, and achieving effective treatment of exhaust gas in practical use is an extremely complex process that can be completed in less than 1 second. From theory to models, the relevant mechanisms can be explored. Through three types of concentrated discharge, exhaust gas molecules transition from low-energy E to the Em level, which is sufficient to ionize them, in one thousandth of a second. The bonds of exhaust gas molecules are fully broken, and the particles that break after avalanche impact are further transformed due to their smaller mass, reacting with oxygen ions and hydroxide ions in the reactor to generate harmless and odorless CO2, H2O, and other high valence compounds. At the same time, due to the effects of ozone and ultraviolet radiation inside the reactor, different types of waste gas compounds are completely removed, providing a broad-spectrum removal space on site.

Mechanism of pollutant removal

In the process of plasma chemical reaction, the transfer of chemical energy by plasma is roughly as follows:

(1) Electric field+electrons → high-energy electrons

(2) High energy electrons+molecules (or atoms) → (stimulated atoms, stimulated groups, free groups) active groups

(3) Active groups+molecules (atoms) → products+heat

(4) Active groups+active groups → products+heat

From the above process, it can be seen that electrons first obtain energy from the electric field, and transfer the energy to molecules or atoms through excitation or ionization. The molecules or atoms that obtain energy are excited, while some molecules are ionized, thus becoming active groups; Afterwards, these active groups collide with molecules or atoms, as well as with each other, to generate stable products and heat. In addition, high-energy electrons can also be captured by substances with strong electron affinity such as halogens and oxygen, becoming negative ions. These negative ions have excellent chemical activity and play an important role in chemical reactions.