SYSTEM AND METHOD FOR PRODUCING CEMENT CLINKER BY OXY-FUEL COMBUSTION

WIPO Patent Application WO/2022/236593

A1

A system and method for producing cement clinker by oxy-fuel combustion circulation preheating, the system comprising a preheater, a decomposing furnace, a smoke chamber, a rotary kiln and a cooling machine; the cooling machine comprises a first cooling area and a second cooling area; the first cooling area comprises a first cooling subarea and a second cooling subarea; mixed gas of high-concentration pure oxygen and carbon dioxide flue gas is introduced into an inlet of the first cooling subarea, and an outlet of the first cooling subarea communicates with an air inlet of the rotary kiln; first cooling gas discharged from the outlet of the first cooling subarea serves as secondary air to enter the air inlet of the rotary kiln, and carbon dioxide flue gas is introduced into an inlet of the second cooling subarea; an outlet of the second cooling subarea communicates with the air inlet of the rotary kiln by means of a first pipe; and second cooling gas discharged from the outlet of the second cooling subarea is controlled to serve as quartic air to enter the air inlet of the rotary kiln. Therefore, the concentration of O2 in the mixed gas within the rotary kiln is adjusted, and then the flame temperature of oxy-fuel combustion of the rotary kiln is controlled.

HE XIAOLONG (CN)
PENG XUEPING (CN)
CHEN CHANGHUA (CN)
DAI ZHONGYUAN (CN)

PCT/CN2021/092821

November 17, 2022

May 10, 2021

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TIANJIN CEMENT IND DESIGN & RES INST CO LTD (CN)

F27D13/00; C04B7/43

CN112608049A	2021-04-06
CN111750683A	2020-10-09
CN112500001A	2021-03-16
CN111750684A	2020-10-09
CN101839473A	2010-09-22
JP2006189191A	2006-07-20

BEIJING IPLING INTELLECTUAL PROPERTY LAW FIRM (CN)

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