What problems can Sinton electric heaters solve for you in the VOCs (volatile organic compounds) treatment process?

Different process requirements have different demands for electric heaters. Common processes and corresponding temperature ranges are as follows:

Catalytic Combustion (CO/RCO) process
1. Core function
By using a catalyst to lower the combustion activation energy of VOCs, the reaction can proceed at a lower temperature, reducing energy consumption and avoiding the generation of NOx.
2. Temperature range
Preheating stage: The exhaust gas is heated to 200-400 ℃ through Sinton electric heaters to ensure that the catalyst bed reaches the ignition temperature.
Reaction stage: Under the action of a catalyst, VOCs are oxidized and decomposed into CO₂ and H₂O at 250 to 350℃.
Temperature control accuracy: The PID temperature control system maintains a fluctuation of ±1 to 5℃, adapting to waste gas of different concentrations.
3. Equipment features
Sinton electric heaters are designed with power groups (such as 10 to 150kW per group), supporting staged heating.
The heat storage body recovers heat, compensates for heat loss and reduces energy consumption.
4. Applicable industries
Treatment of medium and low concentration VOCs waste gas from coating, printing, electronics and other industries.

Regenerative Thermal Oxidation (RTO) process
1. Core function
Heat is recovered through ceramic heat storage bodies to achieve high-temperature oxidation decomposition and treat high-concentration or complex component VOCs.
2. Temperature range
Reaction temperature: Above 760℃, ensuring the complete decomposition of complex VOCs (such as benzene series substances, halogenated hydrocarbons), meeting the emission standard of DRE (Destruction and Removal Rate) ≥99%.
Heat storage medium switching compensation: Setting 760℃ can offset the temperature drop of 50 to 100℃ during switching, preventing incomplete oxidation to form dioxins or CO.
3. Equipment features
The Sinton electric heater can quickly heat up during the auxiliary start-up stage, reducing gas consumption.
4. Applicable industries
Treatment of high-concentration and highly toxic VOCs waste gas from chemical, pharmaceutical and other industries.

Direct Combustion (TO) process
1. Core function
Direct oxidation and decomposition of VOCs at high temperatures is suitable for high-concentration or hard-to-degrade waste gas.
2. Temperature range
Reaction temperature: 600-800℃, ensuring the complete decomposition of VOCs.
The function of Sinton electric heater: Assist in heating low-concentration waste gas and reduce fuel dependence.
3. Equipment features
A waste heat recovery device needs to be equipped to reduce operating costs.
4. Applicable industries
Remote factory areas without existing heat sources (such as steam or natural gas).

Heating in the desorption stage
1. Core function
In the adsorption-desorption system, the VOCs adsorbed by activated carbon are heated to desorb and enter the subsequent treatment unit.
2. Temperature range
Desorption temperature: 80-120℃ (steam desorption) or 100-180℃ (hot nitrogen desorption), depending on the saturated vapor pressure of VOCs.
Temperature control: Avoid chemical adsorption or energy waste caused by excessively high temperatures.
3. Equipment features
The Sinton electric heater is combined with the heat exchanger to achieve the recycling of heat.
4. Applicable industries
Treatment of medium and small air volume and medium and low concentration VOCs waste gas.

Key Factors for Temperature Selection
VOCs components: Complex components require higher temperatures (such as 760℃ for RTO).
Processing efficiency requirements: DRE≥95%. Strict temperature control is necessary (such as 250~350℃ for RCO).
Energy consumption and cost: Catalytic combustion (CO/RCO) is 30% TO 50% more energy-efficient than direct combustion (TO).
Safety: The explosion-proof designed electric heater is suitable for flammable and explosive environments.
Summary
Catalytic combustion (CO/RCO) : 250-350℃ (reaction stage), 200-400℃ (preheating stage).
Regenerative thermal oxidation (RTO) : above 760℃ (reaction stage).
Direct combustion (TO) : 600-800℃ (reaction stage).
Desorption stage: 80-180℃ (adjust according to the desorption medium and the nature of VOCs).
In practical applications, the process and temperature parameters need to be comprehensively selected in combination with the composition, concentration, emission standards and economy of the exhaust gas. Sintonheater can also provide you with customized designs based on the temperature requirements of your project. Welcome to contact us.