The gas cleaning section consists of an insulated cyclone, a finned
cooler, an insulated baffle filter, a bag filter and a bag cooler. The cyclone
is situated in the hot gasifier outlet stream and is equipped with an extra
whirl chamber for optimum particle collection efficiency. The finned
cooler is placed between the cyclone and the baffle filter to avoid
damage to the filter by too high gas temperatures. The insulated baffle or
sheet filter is a simple impingement separator with removable covers for
cleaning. The bag or glass fibre filter consists of a number of glass fibre
filter bags in a container. This 'filter house' is well insulated in order to keep the temperature above 100°C and so avoid water condensation. The
bags can be cleaned by periodic vibration of the bag suspension frame. In
order to safeguard the bags, the inlet temperature is monitored and not
allowed to be above 220°C. The house is fitted with a tap for the removal
of condensates.