Thermal oxidizers are the most effective solution for the abatement of industrial odors, since they operate transforming the molecules responsible for olfactory issues in sub-products characterized by a higher olfactory threshold. The chemical action is therefore fundamental in getting results that other technologies – e.g. absorption, adsorption – couldn’t obtain.
The olfactory load of a gaseous stream is normally made of hundreds, if not thousands, of organic compounds of various kinds. These compounds are often present in very low quantity, so that their concentration can sometimes be just a few tens of milligrams/m³ of air. The problem is that some of these pollutants can sometimes have a reduced “olfactory threshold” along with an annoying and/or unpleasant smell. For “reduced olfactory threshold” we mean that some substances can be perceived even at low physical concentrations, i.e. when their presence is highly reduced. This kind of pollutants can often cause olfactory issues.
The operating principle of the deodorizing oxidizer is the same as the one described for direct thermal oxidizers, recuperative or regenerative.
The direct oxidizer is preferable for the treatment of small air quantities with high pollutant concentrations and with other substances that would complicate the plant handling, as for example with organic and inorganic dusts which could cause clogging.
The recuperative thermal oxidizer is suggested for bigger flowrates with dusts or problematic compounds, and when a further heat recovery able to heat process fluids (hot water, thermal oil, vapor) can be added downstream the plant.
The regenerative thermal oxidizer, on the other hand, is the ideal solution in case of high flowrates with dusts and oily compounds which could cause the clogging of the ceramic material but are present in such small quantities to avoid this risk.
In all the above-mentioned cases, the oxidizers dedicated to industrial odours abatement must have the following characteristics:
All these details offer the most complete and suitable solution when you have high olfactory loads and you want to definitively solve the problem.
These solutions are typically applied in the following sectors:
Please note that each case needs a specific evaluation of the pollutants to be abated, in order to classify their origin and consequently choose the right abatement technology.
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