RECOVERING SYSTEM FOR RESOURCES FROM SEWER SLUDGE

摘要

PURPOSE:To obtain effective gaseous fuel and lumped ashes as resources from solids in a system for using separated and dried sewer sludge and gases for drying, heating and fuel, by supplying part of separated solids to a gasifying device and the rest to a cyclone combustion chamber. CONSTITUTION:The dry sewer sludge and gases separated in a separator 5 are heated to high temp. with a heat exchanger 8, and part thereof are supplied to a drying furnace 4 and the rest to a heater 3. After drains are separated by a means 15, the drains are used as fuel for a gasifying device 21. Part of the solids separated in the separator 5 are supplied with a supply device 6 to the device 21, where the greater part of volatile components are gasified by heating as well as supplying and stirring of gas for acceleration of evaporation such as superheated steam. The gases are removed through a pipe 24 and are used as resouces for fuel gas. The waste combustiongases from the device 21 are conducted to the exchanger 8 and the ashes are fed through a discharge pipe 25 to a cyclone combustion chamber which is the 1st combustion chamber of an ash treating device 22. The rest of the solids are supplied to said chamber with a supply device 6' and the lumps of ashes are removed through the removing means 26 in the bottom of a water tank below said device. Said lumps are used as soil reforming agents.