Drum treating brown coal smoke gases - is located within smoke passage of brown coal-fired boiler with lime crusher and conveyor, optimising temp. and application of lime in treatment of effluent sulphurous gases

摘要

The assembly to remove sulphur from a brown coal-fire water boiler uses effluent heat in a rotating drum reactor with lime milk and an additive suspension. The rotating double-walled drum (1) is located with its conveyor and crusher in the steam boiler smoke (20) gas effluent passage. The lime milk (19) injection jet (8) is centrally located in the inlet. An inlet for lime and/or abrasive substance is located in the lower section of the drum, and/or a water inlet (28) and a further lime inlet (26) in the drum upper section. A lime milk pipe enters a settling tank (13) in the lower drum section (11). The settling tank (13) is linked to a mixer vessel (10) by a pipe bearing the caustic solution (14), which supplies the injection jet group (8) via a pump (18). A solids drainage channel (15) is located in the lower drum end (11) sector. This is linked to a vessel (25) via a mill (16) and pipe (36), which charges the lime inlet (26) for the drum (1). USE/ADVANTAGE - The assembly neutralises sulphur compounds from smoke gases emitted by burning brown coal. The assembly maintains steady conditions and temperature which maximise the binding role of the lime.