Operation
The thermal incinerator is a system which converts gas or vaporous pollutants found in the exhaust gas in to non-polluting compounds by way of direct combustion. The procedure is based upon the fact that lower amounts of volatile pollutants can be burnt under suitable conditions without producing residue.
First and foremost these conditions require a combustion chamber with a temperature measuring over 750 °C. That means that all of the exhaust gas must be heated up to this temperature in order to reach the degree of purification required by law.
This process would have required a high amount of heat energy and therefore a heat exchanger is installed behind the combustion chamber in order to use as much energy from the clean gases as possible in order to heat up the cold dirty gases. This is carried out as a shell and tube type heat exchanger and flows in a cross current flow manner.
The procedure can then be implemented when the pollutants can be burned. It has proved itself to be an extremely safe method, particularly with changing or unknown solvent compositions and solvent concentrations.
The raw gas loaded with pollutants is forced into the heat exchanger by a centrifugal fan. Either the whole heat exchanger, or just part of the heat exchanger will be used depending on the amount of pollutants. The raw gas flows through its tubes in a cross current flow manner. The raw gas is then forced into the pre-combustion chamber by an air guidance vent.
When mixed with the combustion gases the pre-heated raw gas then enters the combustion chamber. When the temperature is high enough and a suitable length of exposure time has been reached, the pollutants contained in the raw gas is converted into non-polluting CO2 and H20 vapour.
At the end of the combustion chamber the clean gas is forced into the heat exchanger tubes. Along the way through the heat exchanger tubes the raw gases is heated and cooled.
Eventually the clean gas leaves the system via the clean gas stack.
Excess energy can be used to generate warm water, fresh air as well as thermal oil for example. For more see the Heat Recovery section. ER>>