Thermal oxidation systems

Thermal oxidation systems

A thermal oxidation system is a form of advanced waste combustion facility which converts hazardous liquids or gases into less polluting substances such as water, carbon dioxide, and nitrogen. It is often the only effective means to deal with hazardous chemical waste or pharmaceutical waste.

Basic description of  solid waste thermal oxidation system:

The solid waste is hoisted onto the preparation unit, where it is shredded and mixed, and conveyed into the feeding system. It then is introduced into a rotary kiln – also called primary combustion chamber (PCC) - where it revolves for the gasification of dry or humid solids; at the end of this rotating furnace, a rotary kiln burner ensures the right combustion temperature is always reached. The gases coming from the rotary kiln are sent in the static furnace – also called secondary combustion chamber (SCC) - where they are kept at 1100°C for 2 (two) seconds. Hence all the organic materials from the rotary kiln are destroyed according to the EU regulations. A waste heat boiler (water tubes boiler) is used to ensure heat recovery by producing over-saturated steam. Fumes further undergo neutralisation, filter and DeNOx. After the emission control system, the clean outlet fumes are released to the atmosphere through an exhaust fan and stack.

Basic description of liquid and/or gas waste thermal oxidation system:

Liquid and/or gas wastes from the client’s production process are fed into Vichem’s patented burner called Pulvaporizator®. To perform combustion reactions, the burner is fitted in a combustion chamber also called static furnace. The flue gases, which come from the furnace, are cooled in a waste heat boiler. The energy recovered is used to produce saturated steam. A quench system is used to freeze all thermodynamic reactions and to cool the fumes. The fumes then pass through an absorption unit in which, for halogenated waste treatment, the acid recovery occurs. They are then cleaned in the neutralisation unit, and released to the atmosphere through an exhaust fan and stack.