CPFD modeling of hydrodynamics,combustion and NOx emissions in an industrial CFB boiler

作     者：Jian Chang Xinrui Ma Xin Wang Xiaohang Li Jian Chang;Xinrui Ma;Xin Wang;Xiaohang Li

作者机构：School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China Bluestar(Beijing)Chemical Machinery Co.LtdBeijing100176China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2023年第81卷第10期

页      面：174-188页

核心收录：

学科分类：080703[工学-动力机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：The authors acknowledge the support from the National Natural Science Foundation of China(grant No.22178095) 

主　　题：Hydrodynamics Combustion NOx emission CFB boiler CPFD 

摘      要：The ultra-low NOx emission requirement(50 mg/m^(3))brings great challenge to CFB boilers in *** further tap the NOx abatement potential,full understanding the fundamentals behind CFB boilers is *** achieve this,a comprehensive CPFD model is established and verified;gas-solid flow,combustion,and NOx emission behavior in an industrial CFB boiler are elaborated;influences of primary air volume and coal particle size on furnace performance are *** results indicate that there exists a typical core-annular flow structure in the boiler *** temperature is highest in the bottom dense-phase zone(about 950℃)and decreases gradually along the furnace ***-deficient combustion results in high CO concentration and strong reducing atmosphere in the lower *** concentration gradually increases in the bottom furnace,reaches maximum at the elevation of secondary air inlet,and then decreases slightly in the upper *** decreasing the primary air volume and coal particle size would increase the CO concentration and intensify the in-furnace reducing atmosphere,which favors for NOx reduction and low NOx emission from CFB boilers.