- Bag filters
- Gas conditioning
- Dry deacidification
- Wet deacidification
- De-NOX SNCR
- De-NOX SCR
- Dust handling
The reduction of carbon monoxide, and more generally the oxidation of organic substances (TOCs and VOCs) can be carried out using heat or catalysts. Area Impianti can produce systems of both types, favouring modern catalytic methods, which are integrated into processes that involve deNOx – dediox modules. The oxidation systems are used in the chemical industry, in incinerators, in diesel motors (including those that run on vegetable oil) and in general in all processes in which the temperature conditions and timescale for the completion of the combustion process are not present.
The process for the reduction of CO and of organic substances (both volatile and non-volatile) involves nothing more than their exothermic oxidation, driven forward until CO2 and water are reached as the main components. In this way, it is also possible for these systems to achieve high levels of efficiency in relation to dust, when the dust is mainly composed of unburned elements. The combustion reaction is activated through heat, at 700°C (for the CO) or at 800-900°C (for more complex compounds). Thanks to the use of catalysers, these temperatures can be reduced to 200°C (CO) and 200-400°C (more complex compounds).
These temperatures are generally achieved:
– self-sufficiently, since the exothermic reaction – once standard conditions are reached – produces sufficient heat
– with the use of heat exchangers, recuperators and burners
– by exploiting the thermal capacity of two catalytic modules
The following types of catalysers are generally used:
– Oxides of Cu, Mn, Cr on alumina for the TOCs
– Precious metals on alumina for the CO