Method for efficiently utilizing intermediate-state substances in cement production for drying and treating sludge

• Main Authors: CHEN YANSEN, XIAO GUOXIAN, DING SUDONG
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2021
• Subjects: BLASTING; CHEMISTRY; COMBUSTION APPARATUS; COMBUSTION PROCESSES; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; HEATING; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; WEAPONS

The invention relates to the technical field of sludge treatment, and discloses a method for efficiently utilizing intermediate-state substances in cement production for drying and treating sludge. The method comprises the following steps: 1, taking out cement production intermediate-state substances, namely, a hot raw material rich in calcium oxide and a hot air mixture, from a preheating and predecomposing device of a cement production system, and adjusting the temperature of the mixed material through the feeding amount of the cold raw material. A certain amount of dust-containing high-temperature gas is extracted from the middle-upper part of a decomposing furnace, a cold raw material is added for temperature regulation, then gas-solid separation is performed through a cyclone separator, the temperature range of the mixed hot raw material is 300-850 DEG C, the hot raw material is mixed with sludge in a drying and digestion all-in-one machine and heated, and meanwhile, a large amount of calcium oxide is co