| 摘要 |
PURPOSE:To reduce the size, weight and the cost of the whole device by regenerating a filter by backwash methods using the ejection of high pressure gas from backwash nozzles, and also temporarily shutting off flow of exhaust gas during backwash operation by the adopting of valve plates operated by ejection force of the backwash. CONSTITUTION:Filter casings 37a, 37b housing filter 33a, 33b are arranged on the way of two exhaust passages 102a, 102b branched from an exhaust passage 102. Casing outlet chambers 38a, 38b are provided for surrounding the outlet end of the purified gas passage of each filter 33a, 33b and backwash nozzles 108a, 108b and an exhaust pipes 103a, 103b are connected to the respective chambers 38a, 38b. Valve plates 104a, 104b which are operated to shut off the introducing ports of the exhaust pipes 103a, 103b due to force of backwash jet stream from the backwash nozzles 108a, 108b are arranged at the respective chambers 38a, 38b. Moreover, the backwash nozzles 108a, 108b are connected via electric driven valves 107a, 107b to a high pressure tank 105. |
