RTO technology and RCO technology are the VOCs (volatile organic compounds) treatment technology, which is a mature technology with wide application, good treatment effect, stable operation and low cost.
RCO refers to regenerative catalytic combustion
The principle of RCO regenerative catalytic combustion is:
The first step is the adsorption of the catalyst to VOC molecules, which improves the concentration of the reactants.
The second step is to reduce the activation energy and increase the reaction rate. Can make organic waste gas with catalyst under low light-off temperature, without oxygen combustion, decomposed into CO2 and H2O to emit a large amount of heat, compared with the direct combustion, has low light-off temperature, the characteristics of small energy consumption, and in some cases after reaching the light-off temperature without external heating, reaction temperature at 250-400 ℃.
RTO refers to regenerative thermal oxidation technology
RTO regenerative thermal oxidation is a new unsteady heat transfer method for heat recovery.
Principle is to use the organic waste gas heated to 760 ℃ above make the VOC oxidation in the exhaust is decomposed into CO2 and H2O. The high-temperature gas generated by oxidation flows through the special ceramic heat accumulator, which makes the ceramic body heat up and “heat storage”. The heat storage is used to preheat the subsequent organic waste gas, so as to save the fuel consumption of waste gas heating. RTO technology is suitable for the treatment of medium and low concentration (100-3500mg/m3) exhaust gas, with the decomposition efficiency of 95-99%.
RTO does not contain catalyst, RCO contains catalyst;
RTO operating temperature above 760 ℃, the operating temperature of the RCO in 250 ~ 400 ℃;
RTO may produce NOX secondary pollutants, while RCO does not;
The operating temperature of RCO is low and the operating cost is lower than that of RTO.
These two waste gas treatment processes are the most effective waste gas treatment technologies at present. Compared with photooxygen catalysis, activated carbon, water spray, low-temperature plasma and other processes, the treatment efficiency should be at least doubled, and the effect of ultra-high concentration VOC that cannot be treated by traditional processes is significant. Whether to use RCO or RTO should be decided according to the actual situation of the factory.
Whether it is RCO or RTO, its initial investment cost is much higher than that of traditional processing technology. However, considering the operation and maintenance costs and real processing efficiency, large and medium-sized enterprises still choose these two technologies to be more cost-effective.