Adsorption

Rotary Adsorbers

Large waste gas volumes with low contaminant concentrations
During adsorption the CTP rotor concentrates a large flow with low contaminant concentration to a much smaller, highly concentrated waste gas stream. The concentrated stream is then fed into a small thermal or catalytic oxidation system. CTP has developed a patented recirculation system, resulting in even higher concentration of pollutants than is possible with traditional designs.

Fixed Bed Adsorption

Concentration peaks or batch processing
CTP’s single or multiple fixed beds adsorb the contaminant peaks and highly variable concentrations and then desorb them into a downstream oxidation system.

Contaminant spikes in the raw gas challenge the air pollution control equipment and even lead to a complete shutdown of the system when the temperature limits are exceeded. An upstream CTP Smoothing Bed levels the peaks and this results in more controlled combustion and higher contaminant treating capacity of the entire system.

 
Dry Gas Scrubbing

Removal of inorganic components
The waste gas can contain contaminants such as acids (HCl, HF), sulphur dioxide (SO2), organic pollutants (e.g. PCDD/DF) or heavy metals (e.g. Hg). For dry sorption the waste gas is first cooled down to the proper temperature. Then a sorbent such as sodium bicarbonate or calcium hydroxide or even hearth furnace coke (HOK) is added. Contaminants accumulate on the sorbent which is removed efficiently in a downstream dust collector.