We Design and Supply Industrial Bag and Ceramic Dust Filtration Equipment & Flue Gas Treatment Systems.
We Specialise in Hot Gas Filtration
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Project CAD Section 1

We were contracted to provide 2 small Ceramic filters suitable for a small volume but with a design maximum temperature of 600°C. In addition the filters will be handling a syngas which cannot be mixed with oxygen so an alternative to compressed air would need to be used for the ‘Cleanpulse’ cleaning of the 25 Ceramic element in each of these CPC78 filters. In addition dosing of small amounts of a re-agent is required so the client also opted for a ‘Cleandose’ 25kg bag skid.

Project CAD Section 2


Design Noteables


Besides being made from 316 Stainless Steel to suit the high gas temperatures the filter design itself is not so unusual. The three main areas where it differs from most filters to make it suitable for a syngas application are the bolted and gasketed top access door and in place of compressed air, an inert gas such as nitrogen, is used to pulse clean the ceramic elements. On the dust discharge to the bin, to prevent the air ingress that would be inevitable with a small rotary valve double butterfly valves are used and again Nitrogen used for purging between each valve opening. The clients controls will ensure only one valve will open at any one time ensuring safe operation. Sindanyo pads are used to isolate the support from the heat, the header tank and the upper discharge damper.

Project CAD Section 3


The ‘Cleandose’ skid was adapted to discharge the re-agent directly into the syngas duct. We designed a flanged stainless duct for the client to incorporate into their ducting. Again nitrogen purging between double butterfly valves ensures only small amounts of nitrogen rather than air can enter the process duct below. A number of Sindanyo pads were incorporated to prevent the transfer of heat. As it was with the filter discharge, the pneumatic actuators used on the butterfly vales have open and closed position confirmation feedback for additional safety.

As the contract developed we were also contracted to provide a 50 litre bin to each filter and one of the filters was trace heated under the insulation and cladding. The trace heating applied to the walls of the hopper and the lower half of the case section was required to maintain a temperature of 100°C in the filter during periods when not in use. A specialist stainless steel mineral insulated heating cable was wound over a grid on the surface and a thermostat unit mounted on an off-stand for control.

Project CAD Section 4

Project Manager: Stewart Callis

Completed: March 2019