Caldo Has Over Fifty Successful Installations

Caldo is a leading U.K. supplier of hot gas filtration equipment with over 50 successful installations and more than 10 years experience. Caldo hot gas filters use ceramic filter elements in modular, purpose-built vessels to meet a wide range of process specifications.

Caldo ceramic filtration equipment is ideally suited to processes that would otherwise require the process gas to be cooled or purified before it could be filtered. Such processes include: catalytic gas treatment, pyrolysis and gasification processes, incineration, and dry scrubbing.

Caldo supplies a range of filter sizes and for larger gas flows employs a modular approach, combining several vessels of proven design to achieve the required capacity. The addition of sorbent powder enables the filters to function as dry scrubbers in waste gas applications.

The ceramic filter element is vacuum formed from alumino-silicate ceramic fibers as a 1000-mm long tube, flanged at one end and closed at the other. Its composition is stable under extreme conditions of temperature and/or chemical corrosion. The element can withstand a temperature of 900° C, but if the housing is fabricated in mild steel the filter operating temperature is limited to 450° C. Stainless steel construction allows higher temperatures, albeit at a cost. The elements can resist all chemical attack with the exception of HF.

The elements hang vertically in the filter vessel from the header plate, which separates the clean and dirty compartments.

Caldo has proven standard designs for 64, 120, 214 and 256 element filters.