Drying kiln, and method for auxiliarily drying chromium-containing material by utilizing hot waste gas through drying kiln

• Main Authors: ZHU DAIMAN, HUANG KEMIAO, ZHANG WEIFENG, XIONG JUN, WANG QIAN, CHUAI DAN, LI BINGSHAN, JIA LIYING, LIU RONGMING, LIU ZHI, WEI HANZHONG, WANG YONGQI, LIU HUI, QUAN XIAOKANG, WANG CHANGLEI, HU GUOHUI, ZHOU XIAOWEN
• Format: Patent
• Language: Chinese; English
• Published: 19.06.2018
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; DRYING; DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM; FLUES; FURNACES; HEATING; KILNS; LIGHTING; MECHANICAL ENGINEERING; OVENS; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; RETORTS; WEAPONS

The invention relates to a drying kiln, and a method for auxiliarily drying a chromium-containing material by utilizing a hot waste gas through the drying kiln. The drying kiln comprises a feeding area, a heating area, a discharging area and a hot gas system. The hot gas system comprises a hot gas pipeline group, an exhaust pipeline, a first fan and a second fan. According to the device, the firstfan and the hot gas pipeline group are utilized for introducing a waste hot gas produced after the combustion of a fuel gas from an outer cavity of the heating area into an inner cavity of the discharging area; and the second fan is utilized for discharging the waste hot gas out of the drying kiln. The method comprises the steps of drying the fuel gas; guiding the waste hot gas produced by the fuel gas into the drying kiln so as to enable the waste hot gas to contact the chromium-containing material, so that hexavalent chromium contained in the material is reduced when the waste hot gas is utilized for auxiliarily dr