WO 2016/112735 A1

System for co-processing household solid waste in cement kiln and method thereof

(22) 06.11.2015

(43) 21.07.2016

(57) A system for co-processing household solid waste in a cement kiln and method thereof, the system comprising a drying device (2), a waste storage container (6), a pyrolysis furnace (14), a residue cooling device and a cement kiln system; the drying device (2) is in communication with the waste storage container (6); a gas inlet of the drying device (2) is in communication with a gas outlet of a grate cooler (18) of the cement kiln system; a gas outlet of the drying device (2) is in communication with a gas inlet of the grate cooler (18); the waste storage container (6) is in communication with a gas inlet of the pyrolysis furnace (14) and the gas inlet of the grate cooler (18) respectively; a gas outlet of the pyrolysis furnace (14) is in communication with a gas inlet of a cement kiln decomposition furnace (16); a residue outlet of the pyrolysis furnace (14) is in communication with the residue cooling device. The system dries waste first before pyrolyzing the waste, consumes less heat during pyrolysis, saves energy, and a pyrolysis gas thereof has a high heat value and a fast heat release speed; gas between the drying device (2) and the grate cooler (18) is recycled, saving energy; air from the pyrolysis furnace (14) and the grate cooler (18) is from the waste storage container, forms a negative pressure and effectively prevents harmful gas from leaking; a part of products of the pyrolysis furnace are recycled in the furnace, thus reducing heat loss, and improving heat efficiency of the pyrolysis furnace.

(71) Jiangsu Pengfei Group Co., Ltd, ­Jiangsu (CN)

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