Filtration apparatus for removing particulate material from biomass combustion exhaust

A filtration apparatus for removing particulate material from an exhaust flow generated by combustion of biomass, the system comprising:

• a housing defining an exhaust passage extending through the housing in a flow direction from an inlet opening arranged to receive the exhaust flow therein to an outlet opening arranged to discharge the exhaust flow therefrom;
• a filter screen supported within the exhaust passage of the housing, the filter screen allowing the exhaust passage to pass therethrough between a first side of the filter screen and an opposing second side of the filter screen while preventing passage of the particulate material through the filter screen between the first side and the second side of the filter screen;
• and
• an operating linkage supporting the filter screen and the housing to be movable relative to one another between (i) a first configuration in which the exhaust flow passes through the filter screen in the flow direction from the first side to the second side of the filter screen and (ii) a second configuration in which the exhaust flow passes through the filter screen in the flow direction from the second side to the first side of the filter screen.