- Absorption equipment
The absorption method mainly uses low-volatile or non-volatile solvents to absorb VOCs, and then uses VOCs to separate the physical properties of the absorbent.
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The VOCs-containing gas enters the tower from the bottom of the absorption tower, and is in contact with the absorbent from the exhaust gas treatment equipment during the ascending process, and the purified gas is discharged from the top of the tower. The desorbed absorbent is condensed in a solvent condenser and returned to the absorption column. The desorbed VOCs gas passes through the condenser and the gas-liquid separator and exits the stripper with purer VOCs gas, and is recycled. The process is suitable for gas purification with higher concentration of VOCs and lower temperature. In other cases, corresponding process adjustment is required.
2. Adsorption equipment
When a fluid mixture is treated with a porous solid material, certain components of the fluid can be adsorbed on the surface and concentrated thereon, a phenomenon known as adsorption.
After the adsorbate is adsorbed on the solid surface, a part of the adsorbed adsorbate can be detached from the surface of the adsorbent. When the adsorption is carried out for a period of time, the adsorption capacity is significantly reduced due to the concentration of the surface adsorbate. At this time, certain measures are needed to desorb the adsorbed adsorbate on the adsorbent to cope with the adsorption capacity of the exhaust gas treatment equipment. This process is called regeneration of the adsorbent. Therefore, in the actual adsorption engineering, it is the recycling process of adsorption-regeneration and re-adsorption to remove the pollutants in the exhaust gas and recover the useful components in the exhaust gas.
3. Organic waste gas combustion and catalytic purification equipment
The combustion method is effective for treating high concentrations of Voc and malodorous compounds. The principle is to burn these impurities with excess air, most of which produces carbon dioxide and water vapor that can be released into the atmosphere. However, when treating organic compounds containing chlorine and sulfur, combustion produces HCl or SO2 in the product, which requires further treatment of the post-combustion gas.
