Abstract
Moving granular bed is one of the candidates of high temperature dust collectors. In the present work, influence of temperature on the collection performance of granular bed filter was experimentally investigated. When there is no temperature difference between aerosol and granules, the collection efficiency at a high temperature is estimated by the prediction equation obtained at room temperature with correction for the physical property of air due to the temperature rise. When the temperature gradient exists between aerosol and granules, the collection efficiency of submicron particles markedly iilcreased at a low filtration velocity as the temperature difference increased, because of thermophoretic force. Although the utilization of thermophoretic force leads to cooling of gas, thermophoretic force may be used to remove submicron particles effectively.
