Standard Three-Chamber RTO for Comprehensive Chemical VOC Treatment
Project Overview
The system is applied to a large chemical park for centralized treatment of tank farm exhaust, production process waste gas and loading/unloading intermittent exhaust. The waste gas contains vinyl acetate, ethylene, methanol, aldehydes and esters, with mixed continuous and intermittent working conditions. Strict requirements are put on pollutant removal, dioxin control and overall compliance.
Process Solution
Full-process advanced treatment: Buffer Separator + Baghouse + RTO + Secondary Combustion Chamber + Quenching Tower + Deacidification + Activated Carbon Adsorption
Process Flow: Mixed Waste Gas → Buffer Gas-Liquid Separator → Baghouse → RTO & Secondary Combustion Chamber → Flue Gas Quenching Tower → Semi-dry Deacidification → Activated Carbon Injection → Baghouse → High-Altitude Discharge
High-temperature Oxidation: RTO + secondary combustion chamber keep flue gas above 850℃ for over 2 seconds to decompose VOC and dioxin precursors.
Rapid Quenching: Flue gas is cooled down to below 200℃ within 1 second, avoiding the 200~400℃ dioxin regeneration temperature range.
Deep Purification: Deacidification system removes SO₂ and HCl; activated carbon adsorbs residual VOC and heavy metals for multi-layer guarantee.
Main Equipment
Three-chamber RTO, secondary combustion chamber, natural gas burner (1 operational + 1 standby), flue gas quenching tower, semi-dry deacidification tower, activated carbon injection device, baghouse, sealed conveying & slag removal equipment, PLC & full-set monitoring interlock system.
Operation Performance
- Purification effect: VOC destruction efficiency ≥ 98%, Dioxin ≤ 0.1 ng TEQ/m³, particulate matter and acidic gas all meet national standards.
- Working condition adaptability: Supports single or multiple waste gas streams operation, adapting to equipment maintenance and intermittent exhaust of tank farms.
- Energy saving: 95% heat recovery rate; the system can run without auxiliary fuel under medium and high VOC concentration.
- Compliance: Fully compliant with national petrochemical & environmental standards, passing regular environmental inspections smoothly.
Technical Highlights
- Complete dioxin prevention system (high-temperature incineration + rapid quenching) meeting the strictest domestic environmental requirements.
- Compact modular layout, applicable to new projects and old plant renovation.
- Comprehensive safety interlock system for fan, flame, pressure and temperature to ensure production safety.