CAJ | 학술논문

针对褐煤水分高、发热量低、易风化自燃等特点，以内蒙古褐煤为研究对象，进行了褐煤静态干燥实验和褐煤提质多因素实验。以 O2体积分数10.5％的烟气为干燥介质，在分析褐煤流化床提质干燥机理的基础上，对褐煤进行流化床动态提质实验。结果表明：褐煤提质水分控制在5％左右为宜。褐煤粒级小于3 mm 时，温度对煤样干燥速度影响最大，其次是煤样粒度，风速对干燥速度影响最小。确定全粒级、0.5~1.25、1.25~2、2~3 mm 褐煤临界流化风速分别为38、20、40和50 m3/ h。褐煤适宜提质温度和时间分别为200~240℃和5~8 min。最后建立了褐煤提质模型，说明褐煤提质规律与提质介质温度、风速密切相关，该模型对褐煤提质生产具有指导作用。
침대갈매수분고、발열량저、역풍화자연등특점，이내몽고갈매위연구대상，진행료갈매정태간조실험화갈매제질다인소실험。이 O2체적분수10.5％적연기위간조개질，재분석갈매류화상제질간조궤리적기출상，대갈매진행류화상동태제질실험。결과표명：갈매제질수분공제재5％좌우위의。갈매립급소우3 mm 시，온도대매양간조속도영향최대，기차시매양립도，풍속대간조속도영향최소。학정전립급、0.5~1.25、1.25~2、2~3 mm 갈매림계류화풍속분별위38、20、40화50 m3/ h。갈매괄의제질온도화시간분별위200~240℃화5~8 min。최후건립료갈매제질모형，설명갈매제질규률여제질개질온도、풍속밀절상관，해모형대갈매제질생산구유지도작용。
The lignite has the disadvantages of high moisture,low calorific value and easy spontaneous combustion.The essay took lignite in Inner Mongolia as object,carried out the lignite static drying test and upgrading multi-factor test.Taking the flue gas in which the O2 vol-ume fraction was 10.5% as drying medium,the serial experiments of fluidized bed upgrading based on the analysis of fluidized bed upgra-ding principle were conducted.The results showed that,the optimum moisture was around 5%.When the lignite size was below 3 mm,the temperature affected the drying rate most,followed by lignite size and air speed.The paper determined the critical fluidized air speed for to-tal size fraction,0.5 to 1.25 mm,1.25 to 2 mm,2 to 3 mm was 38,20,40,50 m3 / h respectively.The optimum upgrading temperature and time was 200 to 240 ℃ and 5 to 8 minutes.At last,an upgrading model was built which had a guidance function to lignite upgrading.