US 12,264,879 B2
Kiln system and method for firing ceramsite and by-producing waste heat by utilizing raw materials with heating values
Yu Li, Beijing (CN); and Changqing Yao, Zibo (CN)
Assigned to University of Science and Technology Beijing, Beijing (CN); and Shandong Econ Energy Saving Technology Co., Ltd, Zibo (CN)
Filed by University of Science and Technology Beijing, Beijing (CN); and Shandong Econ Energy Saving Technology Co., Ltd, Zibo (CN)
Filed on Jan. 27, 2022, as Appl. No. 17/585,591.
Claims priority of application No. 202110110281.6 (CN), filed on Jan. 27, 2021.
Prior Publication US 2022/0236009 A1, Jul. 28, 2022
Int. Cl. F27D 17/10 (2025.01); F27B 9/12 (2006.01)
CPC F27D 17/10 (2025.01) [F27B 9/12 (2013.01); F27B 2009/122 (2013.01); F27B 2009/124 (2013.01); F27D 17/102 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A kiln system for firing ceramsite and by-producing waste heat by utilizing raw materials with heating values, comprising a drying section, a preheating section, a firing section, a soaking section, a cooling section, and a decarburization section arranged between the drying section and the preheating section,
wherein the decarburization section comprises an ignition zone, a hot air combustion zone and a waste heat recovery pipeline; alternatively the decarburization section comprises the ignition zone, a pyrolysis zone and the waste heat recovery pipeline;
wherein a heat source is introduced into the ignition zone so that a temperature of the ceramsite of the raw materials with heating values in the ignition zone is 400° C. to 900° C.,
the hot air combustion zone or the pyrolysis zone is configured for combusting or pyrolyzing carbon-containing materials and organic components in the raw materials with heating values in the ceramsite, and
the waste heat recovery pipeline is configured for discharging decarburization exhaust gas and recovering heat released after the raw materials with heating values in the ceramsite are combusted or pyrolyzed in the decarburization exhaust gas.