粉煤灰烘干機是煤粉經高溫燃燒后形成的一種似火山灰質混合材料。
它(ta)是(shi)燃(ran)燒煤的(de)(de)發(fa)電(dian)廠將煤磨成(cheng)(cheng)100微米(mi)以下的(de)(de)煤粉(fen),用預(yu)熱空氣(qi)噴入爐膛經(jing)(jing)燃(ran)燒形(xing)成(cheng)(cheng)懸浮狀態(tai),產(chan)生混雜(za)有大量不燃(ran)物(wu)的(de)(de)高溫(wen)煙氣(qi),經(jing)(jing)集(ji)塵裝置捕集(ji)就(jiu)得(de)到了粉(fen)煤灰(hui)(hui)。粉(fen)煤灰(hui)(hui)的(de)(de)化(hua)學組成(cheng)(cheng)與粘土質(zhi)相似,主要成(cheng)(cheng)分為二氧化(hua)硅、三氧化(hua)二鋁、三氧化(hua)二鐵、氧化(hua)鈣和未(wei)燃(ran)盡(jin)碳(tan)。
工作原理
濕(shi)粉(fen)煤(mei)灰(hui)由供料(liao)裝(zhuang)置進(jin)入三(san)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的(de)內(nei)(nei)層(ceng),實現順流烘(hong)干, 粉(fen)煤(mei)灰(hui)在(zai)(zai)內(nei)(nei)層(ceng)的(de)抄(chao)板下不(bu)斷抄(chao)起、散落呈螺旋行(xing)(xing)進(jin)式(shi)(shi)實現熱交換(huan),物(wu)(wu)(wu)料(liao)移(yi)動至內(nei)(nei)層(ceng)的(de)另一(yi)(yi)端進(jin)入中(zhong)(zhong)層(ceng),進(jin)行(xing)(xing)逆流烘(hong)干,物(wu)(wu)(wu)料(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)不(bu)斷地(di)被反復揚進(jin),呈進(jin)兩步退一(yi)(yi)步的(de)行(xing)(xing)進(jin)方式(shi)(shi),物(wu)(wu)(wu)料(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)既(ji)充分吸(xi)收內(nei)(nei)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)散發(fa)的(de)熱量,又吸(xi)收中(zhong)(zhong)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的(de)熱量,同時又延長了(le)干燥時間,物(wu)(wu)(wu)料(liao)在(zai)(zai)此達到(dao)干燥狀態(tai)。物(wu)(wu)(wu)料(liao)行(xing)(xing)至中(zhong)(zhong)層(ceng)另一(yi)(yi)端而落入外(wai)層(ceng),物(wu)(wu)(wu)料(liao)在(zai)(zai)外(wai)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)內(nei)(nei)呈矩形(xing)多回路方式(shi)(shi)行(xing)(xing)進(jin),達到(dao)干燥效果(guo)的(de)物(wu)(wu)(wu)料(liao)在(zai)(zai)熱風作用下快速行(xing)(xing)進(jin)排出滾(gun)(gun)筒(tong)(tong)(tong),沒有達到(dao)干燥效果(guo)的(de)濕(shi)物(wu)(wu)(wu)料(liao)因自(zi)重(zhong)而不(bu)能(neng)快速行(xing)(xing)進(jin),物(wu)(wu)(wu)料(liao)在(zai)(zai)此矩形(xing)抄(chao)板內(nei)(nei)進(jin)行(xing)(xing)充分干燥,由此達到(dao)干燥效果(guo),完成干燥過程。
設(she)備特點
該(gai)設備與(yu)其他干燥設備相比,生產(chan)(chan)能力大,可(ke)連續(xu)操(cao)作; 結構簡單,操(cao)作方(fang)便;故障少,維修費(fei)用(yong)低;適(shi)用(yong)范圍(wei)廣,流體阻力小,可(ke)以(yi)用(yong)它干燥顆料(liao)狀物料(liao),對于那(nei)些附(fu)著性大的物料(liao)也很有(you)利;操(cao)作彈(dan)性大,生產(chan)(chan)上允許產(chan)(chan)品的流量有(you)較大波動范圍(wei),不會影響產(chan)(chan)品的質量;清掃容易。