Catalytic Oxidation of Waste Gas
Our VOC Treatment technologies are able to treat gas stream for different flow rate and several types of VOC content. During the last 30 years KVT collected experience and knowhow so we offer tailor-made solutions starting from a close cooperation with our customer.
Catox: Is suitable for a wide range of gas streams with medium heating values, small streams of specific applications or high quantities of waste gas. It is based on the catalytics oxidation that allows VOC reaction at not more than 500°C. This is the working temperature in the catalyst bed; this temperature limit is the starting point for the design that determines if the gas flow rate in combination with VOC content is suitable for this solution.
Only for start up and running conditions with low VOC concentrations, an electric heating unit supplies the necessary thermal energy in order to maintain the oxidation process on the catalyst.
On the catalyst bed the VOCs incinerate for more than 99,5 % to water and carbone dioxid.
This solution offers flexible stream quantity, low running temperature and efficient energy recovery system.
If necessary raw gas and cooling air are mixed on the suction side of the blower.
The air mixture is preheated in a plate heat exchanger close to the catalyst working temperature. On the catalyst bed the VOCs burn for more than 99,5 % to water and carbone dioxid. The working temperature in the catalyst bed does not exceed 500 °C. This temperature limit and the rate of heat recovery determine the maximum temperature difference between inlet and outlet of the reactor. Hence, the maximum concentration for running the plant without overheating the catalyst can be calculated.
For waste gases with concentration near to flammability limits, the continuous support of fresh air is extremely important. In this case minimum flow of volume must be controlled by flow and pressure measuring instruments. Flow and temperature controlling is done by positioning the valves and by the speed of the fan.
The energy content of the pure gas is used to preheat the raw gas.
For start up and running conditions with low VOC concentrations, an electric heating unit supplies the necessary thermal energy in order to maintain the oxidation process on the catalyst.