| 摘要 |
PURPOSE:To obtain a high speed chemical degreasing furnace in which a chemical decomposition method and exhaust gas treatment are established by installing a sensor which detects NOx concentration downstream from the exhaust gas treatment part of a gas treatment passage in a furnace and controlling the supply amount of a carbonization source on the basis of the signal of the sensor. CONSTITUTION:A chemical degreasing furnace main body 2 is equipped with a non- oxidative gas introduction passage 21, a gas discharge passage 22, a degreasing agent supply passage 23, and a means for adjusting temperature in a furnace, and a molded material 7 of a kneaded material comprising fine particles which can be sintered and a binder having polyacetal resin as a main component is degreased. A supply part 3 of NOx gas or a liquid generating NOx is connected to a degreasing agent supply passage 23 through a valve 31 which can control a flow rate. An exhaust gas treatment part 43 which decomposes gas in the furnace generated during degreasing is installed in the gas discharge passage, and a carbon source supply passage 53 is connected with the treatment part 43 or its upstream part through a flow rate control valve 54. A NOx concentration detecting sensor 51 is installed downstream from the exhaust gas treatment part 43 of a passage 4 for treating gas in the furnace, and the valve 54 is actuated by the signal of the sensor. |
