How to Select the Optimal VOCs Organic Waste Gas Treatment Engineering Equipment for a Specific Concentration Range of VOCs?

Selecting the Optimal VOCs Organic Waste Gas Treatment Engineering Equipment for a Specific Concentration Range of VOCs

When selecting the most suitable VOCs Organic Waste Gas Treatment Engineering Equipment, precise matching based on the concentration characteristics of the waste gas, flow rate, and process requirements is essential.

1. Matching the Process Based on Concentration Characteristics

High-concentration VOCs (>10000 ppm or 10000 mg/m³): This type of waste gas often provides sufficient calorific value for combustion. The optimal choice is a regenerative thermal oxidizer (RTO) or a high-temperature direct combustion system. Due to the high organic content in the waste gas, these systems can utilize the calorific value of the waste gas for self-sufficiency, achieving both efficient removal and energy conservation and emission reduction.

Medium-concentration VOCs (500-10000 ppm): In this range, the calorific value may be insufficient to sustain combustion or the cost may be too high. The best solution is to use activated carbon adsorption concentration technology. Waste gas is concentrated into a high-concentration gas through adsorption devices before being treated by catalytic combustion or combustion devices. This combined process ensures high removal rates while significantly reducing operating costs.

Low-concentration VOCs (<500 ppm): The waste gas has extremely low calorific value and is not suitable for direct combustion. Adsorption or biological filtration is recommended. Activated carbon adsorption is economical and reliable, suitable for low-flow-rate applications; while biological filtration is suitable for water-soluble VOCs and is environmentally friendly, but its treatment efficiency may be limited by temperature.

2. Considering Waste Gas Flow Rate and Properties

Large-volume, low-concentration waste gas: Commonly seen in the spraying and coating industries. In this case, adsorption concentration + catalytic combustion (adsorption-desorption-catalytic combustion) processes should be prioritized. This process converts large-volume waste gas into small-volume, high-concentration waste gas through adsorption concentration, effectively reducing the cost of catalyst usage.

Specific components in high-concentration waste gas: If the waste gas contains halogenated compounds, heavy metals, or other corrosive gases, pretreatment (such as spraying or condensation) is necessary to remove these components to prevent catalyst poisoning or equipment damage.