CAJ | 학술논문

为提高兰炭在煤粉工业锅炉上的燃烧效率，以陕西煤业化工集团生产的兰炭为原料，进行煤粉工业锅炉燃烧试验，分析了兰炭着火、稳燃、燃烬情况；针对兰炭燃烧过程中存在的问题提出解决方案。结果表明：高效煤粉工业锅炉双锥燃烧器的独特结构和浓相燃烧的方式，为兰炭的着火和稳燃提供了良好条件。在过量空气系数1.2，一、二、三次风比例分别为0.11、0.47、0.42，预热时间3 min，伴燃时间4 min的条件下，实现了兰炭粉的着火和自维持稳定燃烧，燃烧期间后部温度保持在550℃，炉膛中部温度大于800℃。针对兰炭燃烧存在燃烧器内燃点靠后、着火区域温度低和兰炭燃烧不完全等问题，提出可通过调整燃烧室的结构和尺寸，使燃烧器蓄热能力增强，延长煤粉预热时间，产生更多高温回流烟气，使兰炭在燃烧器中快速着火并稳定传播到炉膛，降低兰炭灰残炭率，提高燃烧效率。
위제고란탄재매분공업과로상적연소효솔，이협서매업화공집단생산적란탄위원료，진행매분공업과로연소시험，분석료란탄착화、은연、연신정황；침대란탄연소과정중존재적문제제출해결방안。결과표명：고효매분공업과로쌍추연소기적독특결구화농상연소적방식，위란탄적착화화은연제공료량호조건。재과량공기계수1.2，일、이、삼차풍비례분별위0.11、0.47、0.42，예열시간3 min，반연시간4 min적조건하，실현료란탄분적착화화자유지은정연소，연소기간후부온도보지재550℃，로당중부온도대우800℃。침대란탄연소존재연소기내연점고후、착화구역온도저화란탄연소불완전등문제，제출가통과조정연소실적결구화척촌，사연소기축열능력증강，연장매분예열시간，산생경다고온회류연기，사란탄재연소기중쾌속착화병은정전파도로당，강저란탄회잔탄솔，제고연소효솔。
In order to burn semi coke in industrial pulverized coal boiler,taking the semi coke produced by Shaanxi Coal and Chemical In-dustry Group as research object,the pulverized coal combustion test in industrial boiler was conducted. The ignition,stable combustion and after-combustion were investigated. The corresponding reform measures were provided. The results showed that,the unique double-cone structure of the combustor and the mode of dense phase combustion provided favorable conditions for the ignition and stable combustion of semi coke. The blue coke could be ignited and burned stably when the excess air coefficient was 1. 2 and the proportion of primary air,sec-ondary air and tertiary air was 0. 11,0. 47,0. 42,the combustor was preheated for 3 minutes and the semi coke burned with oil for 4 mi-nutes. During combustion,the temperature in the back of furnace remained 550 ℃,while the temperature in the middle was over 800 ℃. In order to lower burning point,improve temperature in the fire area and make semi coke full combustion,the structure and size of combus-tor was adjusted,the preheating time was prolonged.