The organic waste gas treatment equipment mainly uses different technologies to recover or remove harmful components that reduce exhaust gas emissions, thereby achieving an environmental protection device that protects the environment and purifies the air.
Waste gas treatment equipment classification:
Absorption equipment for exhaust gas treatment equipment
Absorption method uses low volatile or non-volatile solvents to absorb VOCs, and then use VOCs and absorbent physical properties to separate the separation. The VOCs-containing gas enters the tower from the bottom of the absorption tower and contacts with the absorber from the top of the tower during the ascent. The purified gas is discharged from the top of the tower. Absorption of the VOCs-absorbing absorbent passes through the heat exchanger and enters the top of the stripper where it is desorbed at temperatures above the absorption temperature or under pressures below the absorption pressure. The desorbed absorbent is condensed in the solvent condenser and returned to the absorption tower. The desorbed VOCs gas exits the stripper with relatively pure VOCs after passing through a condenser, a gas-liquid separator, and is recycled. The process is suitable for gas purification with high concentration of VOCs and low temperature, and other processes need to be adjusted accordingly.
Adsorption equipment for exhaust gas treatment equipment
When the fluid mixture is treated with a porous solid material, a certain component or components of the fluid may be absorbed on the surface and concentrated on it, a phenomenon known as adsorption. Adsorption of waste gas, the adsorption of the object is a gaseous pollutant, gas-solid adsorption. The adsorbed gas component is called adsorbent, and the porous solid material is called adsorbent. After adsorption of the adsorbate on the solid surface, an adsorbed adsorbate can be detached from the adsorbent surface. However, when the adsorption is carried out for a period of time, due to the concentration of the surface adsorbent, the adsorption capacity thereof is significantly reduced and the adsorption purification requirement is required. At this time, certain measures need to be taken to desorb the adsorbed adsorbate on the adsorbent, with the Adsorption capacity, this process is called sorbent regeneration. Therefore, in the actual adsorption project, it is the adsorption-recycled adsorption cycle that achieves the removal of pollutants in the exhaust gas and recovery of useful components in the exhaust gas.
Industrial organic waste gas combustion catalytic purification equipment for waste gas treatment equipment
The combustion method is very effective for the treatment of high-concentration Voc and malodorous compounds. The principle is to use excessive air to burn these impurities. Most of them generate carbon dioxide and water vapor and can be discharged into the atmosphere. However, when chlorine-containing and sulfur-containing organic compounds are treated, combustion produces HCl or SO2 in the product, which requires further processing of the combusted gas.
Industrial organic waste gas low-temperature plasma treatment equipment for exhaust gas treatment equipment
The plasma is a gas in an ionized state. The plasma is composed of a large number of children, neutral atoms, excited atoms, photons, and free radicals. According to the state, temperature, and ion density, plasma can be generally classified into high-temperature plasma and low-temperature plasma (bag body and cold plasma). Among them, the ionization degree of high-temperature plasma is close to 1, and the temperature of all kinds of particles is almost the same. The system is in the state of thermodynamic equilibrium. It is mainly used in the study of controlled thermonuclear reactions. Low-temperature plasmas, on the other hand, learn non-equilibrium states, and the temperatures of various particles are not the same. The common method for generating plasma is gas discharge. A gas discharge is a mechanism that causes an electron to be ionized from a gas atom or molecule. The gas medium formed is called an ionized gas if ionized gas is generated and formed by an external electric field. Conduction current, this phenomenon is called gas discharge. Due to the treatment of such gaseous contaminants, it is generally required to perform at atmospheric pressure.
Photocatalysis is a normal temperature deep reaction technique. Photocatalytic oxidation can completely oxidize organic pollutants in water, air and soil into non-toxic and harmless products at room temperature, while traditional high-temperature incineration technologies require the destruction of pollutants at extremely high temperatures. Conventional catalysis and oxidation methods also require several hundred degrees of heat. Theoretically, as long as the light energy absorbed by the semiconductor is not less than its band gap energy, it is sufficient to excite the generation of electrons and holes, and the semiconductor may be used as a photocatalyst. Common single compound photocatalysts are mostly metal oxides or sulfides. Each of these catalysts has outstanding advantages for specific reactions and can be selected according to needs in specific studies. For example, CdS semiconductors have small bandgap energy and have better matching performance with the near-ultraviolet light spectrum in the solar spectrum, which can make good use of natural light energy. However, it is prone to photo-corrosion and has a limited service life.
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