1. Condensation recovery method: Organic waste gas is directly introduced into a condenser for adsorption, absorption, desorption, and separation, which can recover valuable organic compounds. This method is suitable for working conditions with high organic waste gas concentration, low temperature, and low air volume, and is required for refrigeration equipment. It is mainly used in the pharmaceutical and chemical industries, and is less commonly used by printing companies.
2. Adsorption method:
(1) Direct adsorption method: Organic waste gas can be purified with a purification rate of over 95% by adsorption with activated carbon. The equipment is simple and the investment is small, but activated carbon replacement is frequent, and additional procedures such as loading, unloading, transportation, and replacement are added, resulting in increased operating costs.
(2) Adsorption retrieval method: Fiber activated carbon is used to adsorb organic waste gas, and after approaching saturation, superheated steam is used to blow back for desorption regeneration; This law requires the supply of necessary steam volume.
(3) Adsorption catalytic incineration method: This method combines the advantages of adsorption and catalytic incineration methods, using new adsorption materials for adsorption. After desorption and desorption, hot air is introduced into the catalytic incineration bed for flameless incineration. The purified waste gas is circulated in the system, greatly reducing energy consumption. This method has the characteristics of stable and reliable operation, low investment, low operating costs, and convenient maintenance, and is suitable for the management of high air volume and low concentration waste gas. It is currently a mature and practical method for managing organic waste gas in China.
3. Direct incineration method: using auxiliary fuels such as gas or fuel to burn, heating the mixed gas, and decomposing harmful substances into harmless substances under high temperature; This method has a simple process and low investment, and is suitable for high concentration and low air volume waste gas, but requires high safety skills and operational requirements.
4. Catalytic incineration method: Heating exhaust gas and converting it into harmless and odorless carbon dioxide and water through catalytic incineration; This method has low ignition temperature, energy saving, high purification rate, convenient operation, small footprint, and large investment, and is suitable for high temperature or high concentration organic waste gas.
5. Absorption method: Physical absorption is usually used to introduce the exhaust gas into the absorption liquid for purification. After the absorption liquid is full, it is heated, analyzed, and condensed before being recovered; This method is applicable to exhaust gases with high gas volume, low temperature, and low concentration, but requires heating, analysis, and recovery equipment, which has a large volume and high investment.
6. Nano micro electrolysis oxidation method: The nano micro electrolysis purification technology uses piezoelectric materials processed at the nanoscale. Under certain humidity conditions, the nano micro electrolysis data can undergo electrical adsorption through a micro electrolysis electric field and release many hydroxyl negative ions to purify aerobic pollutants in the gas. It can not only remove most organic matter in the air, but also analyze inorganic odors such as ammonia nitrogen and hydrogen sulfide.
7. Thermal incineration method: Using a regenerative thermal oxidation furnace RTO to treat organic waste gas can achieve dual energy-saving effects. The range of suitable treatment for organic waste gas is wide and the treatment efficiency is high.