Research Progress and Engineering Demonstration of CCUS Technology
1 Tianjin Cement Industry Design & Research Institute Co., Ltd. , Tianjin 300400, China;
2 School of Chemical Engineering and Technology， Tianjin University， Tianjin 300072， China
Abstract: This paper systematically analyzes the research progress of typical CCUS technologies worldwide, including oxy-fuel combustion, chilled ammonia absorption, membrane separation, calcium looping technologies, etc. It focuses on the research outcomes of the Qingzhou Zhonglian oxy-fuel combustion coupled carbon capture demonstration project. The Qingzhou Zhonglian demonstration project achieved efficient carbon capture in cement production through full oxy-fuel combustion technology, overcoming key technical challenges such as high-oxygen concentration flame control, CO2 enrichment concentration, and meal calcining rate under high CO2 concentration conditions, through innovative methods such as graded oxygen supply and discrete dilution combustion, the energy consumption and cost of carbon capture have been significantly reduced. The research indicates that oxy-fuel combustion technology can increase the CO2 concentration in flue gas to over 80%, laying a foundation for low-energy physical carbon capture. The successful operation of the Qingzhou Zhonglian demonstration project provides an important example for the industrial application of low-carbon technologies in the cement industry.
