Investigation of a novel jet deflector to avoid slag accumulation around secondary air jets in incinerators and boilers

摘要

A major problem in the operation of incinerators is the build-up of slag on the walls in the throat region of the plant between the furance chamber and the radiation shaft. This slag can accumulate to a thickness of about one meter, with a weight of several tonnes. This accumulation reduces the availability of the plant, and poses a safety problem, since injury can occur when the material is removed by pneumatic drills during maintenance operations. The excessive downtime, labor, and other economic costs of the slag removal can be minimized by developing a novel, no-moving-part jet deflector that can prevent or minimize the accumulation of slag around the jets. The jet deflector was developed and designed by understanding the fundamental principles of the fluid and particle dynamics around the highspeed jet.