典型文献
Computational investigation of hydrodynamics,coal combustion and NOx emissions in a tangentially fired pulverized coal boiler at various loads
文献摘要：
This work presents a computational investigation of hydrodynamics,coal combustion and NOx emissions in a tangentially fired pulverized coal boiler at different loads(630,440 and 300 MW;relative loads of 100％,70％and 48％)to clarify the effect of load change on the furnace processes.A computational fluids dynamics model was established;the flow field,temperature profile,species concentration and NOx emissions were predicted numerically;and the influence of burner tilt angles was evaluated.Simulation results indicate that a decrease in boiler load decreases the gas velocity,attenuates the airflow rotations,and increases the tangent circle size.The high-temperature zone and flame moved toward the side walls.Such behaviors impair air-fuel mixing,heat transfer and steady combustion in the furnace.In terms of species concentrations,a decrease in boiler load increased the O2 content,decreased the CO content,and decreased the char burnout rates only slightly.A change in boiler load from 630 to 440 and 300 MW increased the NOx emissions from 202 to 234 and 247 mg/m3,respectively.Burner tilt angles are important in coal combustion and NOx emissions.A burner angle of-15° favors heat transfer and low NOx emissions(＜185 mg/m3)for the current tangentially fired boiler.
文献关键词：
中图分类号：
作者姓名：
Jian Chang;Zhijian Zhou;Xinrui Ma;Jinshuo Liu
作者机构：
School of Energy.Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China
文献出处：
引用格式：
[1]Jian Chang;Zhijian Zhou;Xinrui Ma;Jinshuo Liu-.Computational investigation of hydrodynamics,coal combustion and NOx emissions in a tangentially fired pulverized coal boiler at various loads)[J].颗粒学报（英文版）,2022(06):105-116
A类：
tangentially,burner,Burner
B类：
Computational,investigation,hydrodynamics,coal,combustion,NOx,emissions,fired,pulverized,boiler,various,loads,This,work,presents,computational,different,MW,relative,clarify,effect,change,furnace,processes,fluids,model,was,established,field,temperature,profile,species,were,predicted,numerically,influence,tilt,angles,evaluated,Simulation,results,indicate,that,decreases,gas,velocity,attenuates,airflow,rotations,increases,circle,size,high,zone,flame,moved,toward,side,walls,Such,behaviors,impair,fuel,mixing,heat,transfer,steady,In,terms,concentrations,increased,O2,content,decreased,char,burnout,rates,only,slightly,from,respectively,are,important,favors,current
AB值：
0.465258
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