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Incinerators for exhaust air treatment

Advanced incineration has different modes of application. The procedures differ in their technical approach, their theoretical conception and the possibilities of application. At first, both adsorption and catalytic or thermal incinerators ensure the removal of hazardous substances.

IncineratorAdsorption incinerators are operated with activated carbon or zeolite and are particularly suitable for the provision of steam, inert gas or hot air as the so-called desorption agent. If water containing numerous contaminants results from the use of steam as adsorption agent, it is subsequently purged in an appropriate waste water treatment system. The primary advantage of adsorption systems is that exhaust air which is heavily contaminated by solvents may be purified reliably. In addition, the solvent may be recovered from the exhaust air at the same time and can be recycled.

Another interesting procedure is a process called catalytic incineration. In this process, exhaust air not containing any sulfur residues or heavy metals may be cleaned at low cost. Catalytic incinerators are suitable for enterprises generating medium exhaust air volumes whose hazardous substance contents do not exceed 0.5 to 20 mg per m³. Furthermore, this incineration method may be applied for an extended uninterrupted period. It is therefore designed for enterprises with 24-hour production. This in particular includes the printing and plastics industry, the chemical and the solvent-processing industry as well as roasting facilities.
An important aspect of incineration is thermal incineration. Its advantage is that it is suitable for removing almost any hazardous substances and therefore offers a large range of applications. Thermal incineration implies that a reduction of the energy demand may be ensured by reaching an optimum incineration temperature and minimizing the transition time. In addition, thermal incineration is based on specialized industrial heat exchangers. The clean gas values resulting from post-combustion are achieved in accordance with different requirements which are to be complied with. This is independent from the contamination loads and the composition of the input air.

Incineration may also be performed by a system of incinerators and the related development concentrator. It represents and alternative to regenerative post-combustion and ensures low operating expense. This variant is frequently used in paint shops, enterprises of the chemical industry, foundries and in the plastics-processing sector.
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