| 摘要 |
PROBLEM TO BE SOLVED: To perform a safe and stable drying operation and realize energy saving in exhaust gas deodorizing treatment by using high-temperature air generated in a cement plant as a heat source. SOLUTION: Dehydrated cakes are mixed in the surface of a large amount of dried sludge produced beforehand, and dry exhaust gas after drying the mixed sludge is induced by a drying fan 10. A part of the induced dry exhaust gas (a primary dry exhaust gas) is mixed with the high-temperature air through a first duct 11A to be used to dry the mixed sludge. The remainder of the dry exhaust gas (a secondary dry exhaust gas) is introduced into a combustion furnace 24 through a second duct 11B, thereby the dry exhaust gas is deodorized to generate exhaust gas. The secondary dry exhaust gas is passed through a heat exchanger 12 before being introduced into the combustion furnace 24, thereby heat is exchanged between the dry exhaust gas and the combustion exhaust gas from the combustion furnace 2 to reduce the temperature of the combustion exhaust gas. A part of the secondary dry exhaust gas heat-exchanged in the heat exchanger 12 is recovered, and mixed with the primary dry exhaust gas mixed with the high-temperature air. COPYRIGHT: (C)2005,JPO&NCIPI
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