煤粉(fen)灰烘干機是煤粉(fen)經高(gao)溫燃燒后形成的一(yi)種似火(huo)山灰質(zhi)混合材(cai)料。
它是燃(ran)燒煤(mei)的發電廠將煤(mei)磨成(cheng)(cheng)100微(wei)米以(yi)下的煤(mei)粉(fen),用預熱空氣噴入爐膛經(jing)燃(ran)燒形(xing)成(cheng)(cheng)懸浮狀態,產生混雜有大量不燃(ran)物(wu)的高溫(wen)煙氣,經(jing)集(ji)塵裝(zhuang)置(zhi)捕(bu)集(ji)就得(de)到了粉(fen)煤(mei)灰(hui)(hui)。粉(fen)煤(mei)灰(hui)(hui)的化(hua)(hua)學(xue)組成(cheng)(cheng)與粘(zhan)土質(zhi)相(xiang)似,主要成(cheng)(cheng)分(fen)為二(er)氧化(hua)(hua)硅(gui)、三氧化(hua)(hua)二(er)鋁、三氧化(hua)(hua)二(er)鐵、氧化(hua)(hua)鈣和(he)未燃(ran)盡(jin)碳。
工作原理
濕粉煤灰由(you)供料(liao)裝置進(jin)(jin)入三層(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)內(nei)層(ceng)(ceng)(ceng),實現順流(liu)(liu)烘干(gan), 粉煤灰在(zai)內(nei)層(ceng)(ceng)(ceng)的(de)(de)抄板下不(bu)(bu)(bu)斷抄起、散落呈螺旋行(xing)(xing)(xing)(xing)進(jin)(jin)式實現熱(re)交換(huan),物(wu)(wu)(wu)料(liao)移(yi)動至(zhi)(zhi)內(nei)層(ceng)(ceng)(ceng)的(de)(de)另一端(duan)進(jin)(jin)入中層(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)(xing)逆(ni)流(liu)(liu)烘干(gan),物(wu)(wu)(wu)料(liao)在(zai)中層(ceng)(ceng)(ceng)不(bu)(bu)(bu)斷地被反復(fu)揚進(jin)(jin),呈進(jin)(jin)兩步退一步的(de)(de)行(xing)(xing)(xing)(xing)進(jin)(jin)方式,物(wu)(wu)(wu)料(liao)在(zai)中層(ceng)(ceng)(ceng)既充分(fen)吸(xi)收內(nei)層(ceng)(ceng)(ceng)滾(gun)筒散發(fa)的(de)(de)熱(re)量,又吸(xi)收中層(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)熱(re)量,同時又延(yan)長了干(gan)燥時間(jian),物(wu)(wu)(wu)料(liao)在(zai)此達(da)(da)到(dao)干(gan)燥狀態。物(wu)(wu)(wu)料(liao)行(xing)(xing)(xing)(xing)至(zhi)(zhi)中層(ceng)(ceng)(ceng)另一端(duan)而(er)落入外層(ceng)(ceng)(ceng),物(wu)(wu)(wu)料(liao)在(zai)外層(ceng)(ceng)(ceng)滾(gun)筒內(nei)呈矩(ju)形多回路方式行(xing)(xing)(xing)(xing)進(jin)(jin),達(da)(da)到(dao)干(gan)燥效(xiao)果(guo)的(de)(de)物(wu)(wu)(wu)料(liao)在(zai)熱(re)風(feng)作(zuo)用(yong)下快速行(xing)(xing)(xing)(xing)進(jin)(jin)排出(chu)滾(gun)筒,沒有(you)達(da)(da)到(dao)干(gan)燥效(xiao)果(guo)的(de)(de)濕物(wu)(wu)(wu)料(liao)因(yin)自重而(er)不(bu)(bu)(bu)能快速行(xing)(xing)(xing)(xing)進(jin)(jin),物(wu)(wu)(wu)料(liao)在(zai)此矩(ju)形抄板內(nei)進(jin)(jin)行(xing)(xing)(xing)(xing)充分(fen)干(gan)燥,由(you)此達(da)(da)到(dao)干(gan)燥效(xiao)果(guo),完(wan)成干(gan)燥過程。
設備特點
該設備(bei)與其他(ta)干燥設備(bei)相比(bi),生產(chan)能(neng)力大,可連續(xu)操(cao)作; 結(jie)構簡單,操(cao)作方便;故障少,維修費(fei)用低;適(shi)用范(fan)圍(wei)(wei)廣,流(liu)體阻(zu)力小,可以用它干燥顆料(liao)狀(zhuang)物料(liao),對于那些附著性(xing)大的物料(liao)也(ye)很有利(li);操(cao)作彈(dan)性(xing)大,生產(chan)上允許產(chan)品的流(liu)量有較大波(bo)動范(fan)圍(wei)(wei),不會影響(xiang)產(chan)品的質量;清掃容易。