METHOD FOR PREVENTING ACCUMULATION OF SLUDGE IN A COAL WATER MIXTURE STORAGE TANK

摘要

A method for preventing accumulation of sludge in a coal water mixture storage tank comprises the steps of: preparing a coal and water mixture storage tank having a circulation pump for taking a stored liquid out of the storage tank, a liquid conducting pipe vertically standing inside of the storage tank for conducting the stored liquid discharged from the circulation pump to a bottom of the storage tank, one or more nozzles for jetting the stored liquid out of the liquid conducting pipe toward a radial direction of the storage tank and a rotary means for rotating the liquid conducting pipe having an axis at a center of the storage tank; determining a zone width r(m) of a stirring zone of one of the nozzles, using a formula of : r ? Q /(140 x A0.5) where, A is a sectional area(m2) of a nozzle opening and Q is a flow amount of the stored liquid per one nozzle(m3/h); determing a location of each of the nozzles dependent on the zone width; and jetting the stored liquid from the one or more nozzles in the radial direction of the storage tank while rotating the liquid conducting pipe.