• Material handling section | |
Feeding process | powder raw material disperse (particle size distribution 0.1-50μm), solvent instantaneous volatilization (peak 800-1,200mg/m³) |
Stirring process | breathing waste gas containing unreacted monomer (butyl acrylate 50–200 mg/m³), including resin droplets (viscosity >1,000 cP) |
• Storage and transportation section | |
Tank farm breathing gas | temperature difference between day and night leads to small breathing emissions (air volume fluctuation 200–500 m³/h), containing C6–C12 alkanes (60–80%) |
Sub-packing operation | VOCs disperse at filling port (ethyl acetate concentration gradient 300-1,500mg/m³), instantaneous emissions account for 40% of the total |
• Special pollution source | |
Laboratory ventilation | the components of the experimental waste gas are complex, diverse in nature, and the average daily emission time is <4 h |
Hazardous waste storage room | organic waste liquid volatilization produces benzene series/aldehydes and ketones mixture (concentration background value 50–80 mg/m³) |
esters/ketones/aromatics form azeotrope (boiling point interval 70-160℃), and the traditional condensation recovery rate decays 50-70%
The concentration of air VOCs released by the resin synthesis reactor soared from 200mg/m³ to 3,500mg/m³ in 2 minutes
The lower explosive limit of xylene (1.0%VOL) crossed critically with the concentration of filling operation (0.3-0.8%VOL)
a common treatment system is required for continuous low-concentration discharge between hazardous wastes and intermittent high-concentration discharge in laboratories