Flow of low temperature exhaust gas absorption combined process
I believe that after reading so many issues of condensation and adsorption vapor recovery technology, you have more or less understood VOCs treatment. Today, I will mainly explain the implementation process of low-temperature absorption of waste gas in the comprehensive treatment of VOCs pollution. The process mainly includes the following steps:
Step 1 is waste gas collection: First, the waste gas in the industrial park is collected through a gas collection hood or a pipeline system and concentrated into a low-temperature absorption device. During the collection process, it is necessary to ensure the airtightness and fluidity of the waste gas to prevent gas leakage and discharge.
Step 2 is pretreatment: before entering the low-temperature absorption equipment, the exhaust gas needs to be pretreated. The purpose of pretreatment is to remove particulate matter, water vapor and other impurities in the exhaust gas to avoid contamination and blockage of the absorbent and equipment.
Step 3 is low temperature absorption: low temperature absorption is the core part of the whole process. In the low temperature absorption equipment, the waste gas contacts with the low temperature absorbent, and VOCs are absorbed by the absorbent, thus separating them from the waste gas. The low temperature absorbent is selected as an organic solvent according to the type and concentration of VOCs in the waste gas. Absorption is achieved through equipment such as spray towers and packed towers.
Step 4 is recycling: The absorbent that has absorbed VOCs needs to be treated and recycled. The treatment process uses heating desorption and catalytic combustion to separate VOCs from the absorbent and recycle them. The recovered VOCs can be reused or directly destroyed.
Step 5 is emission: the waste gas after treatment and recycling can meet the emission standards. Before emission, the composition, concentration, temperature and other parameters of the waste gas need to be tested to ensure compliance with national and local emission standards.
