| 摘要 |
1,199,539. Burning waste liquor. COMBUSTION ENG. Inc. 23 Dec., 1968 [27 Dec., 1967], No. 61118/68. Heading F4B. [Also in Division B1] Waste liquor, e.g. concentrated wood-pulp liquor, is dried and the organic matter is burned in furnace 12 which is supplied with hot air from a rotary regenerative heater 22, the air being drawn through the heater and forced into the furnace by a forced draft fan 50 which is connected to the hot air-outlet of the heater and to the air-inlet duct 52 of the furnace. In the plant shown, the liquor-to-betreated is concentrated in evaporator 40 by contacting films of the liquor with hot air from heater 22 before the hot air is forced into the furnace by fan 50. The concentrated liquor is sprayed into the furnace through nozzles 16. The salts remaining after burning the dried material are collected as a smelt S at the bottom of the furnace. The hot exhaust gas from the furnace passes to the discharge stack 30 via rotary regenerative air heater 22. A by-pass 58 and dampers 60, 62, 64 are provided whereby, in an emergency, the air supply to the furnace can be cut off and a portion of the exhaust gas can be returned, via duct 44 and evaporator 40, to the furnace for cooling the smelt S. |
