Hot air regeneration uses heated clean air as a carrier to promote the desorption of stable solvents such as benzene and xylene in the pores of activated carbon through thermal energy. The equipment only requires heating devices and fans, with a simple structure and low operating costs. Although its desorption efficiency is limited by the heat loss of hot air, stable performance with a regeneration rate of 70% -80% can be achieved in low-risk scenarios such as small laboratories and electronic component cleaning by precisely controlling the regeneration temperature (usually 80-130 ℃ for honeycomb charcoal) and adsorption cycle (not exceeding 24 hours). Paired with flame arresters, temperature monitoring, and exhaust gas secondary adsorption systems, it can effectively balance the needs of low-cost operation and safety control.
- High boiling point stable solvents: benzene, xylene (ortho/meta/para), trimethylbenzene, etc., commonly used in the paint and resin production industries.
- Weakly polar solvents: petroleum ether, solvent oil (such as 200 # solvent oil), turpentine, etc., commonly used in metal surface degreasing and rubber processing scenarios.
- Low toxicity and low volatility substances: such as small amounts of chlorobenzene (low concentration) and dimethylformamide (DMF, low concentration), need to control the hot air temperature to avoid decomposition.
