Method and device for gasifying staged combustion of alternative fuel of cement kiln

• Main Authors: CAI WENTAO, HAN LI, LI WEI, LI PING, ZHANG HONGYU, GU JUN, LIU HAIBING
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2017
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

The invention discloses a method and a device for gasifying staged combustion of an alternative fuel of a cement kiln. The device includes a gasified gas outputted from a pyrolysis gasifier and tertiary air of cement kiln fed into a decomposing furnace of the cement kiln, wherein the tertiary air of cement kiln is divided into a first path of air and a second path of air; the two paths of air are respectively fed into the decomposing furnace from upper and lower ends; 10%-30% of total volume of the tertiary air, served as the first path of air, is fed from the bottom of the decomposing furnace; the rest tertiary air, served as the second path of air, is fed from the top of the decomposing furnace; the gasified gas, following the first path of air, is fed from the bottom of the decomposing furnace; the temperature of the flue gas at the outlet of the decomposing furnace is measured for adjusting the air feeding ratio of the first path of air to the total volume of the tertiary air and the feeding volume of the