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。
它是燃(ran)(ran)燒(shao)煤(mei)的(de)發電廠將煤(mei)磨(mo)成(cheng)100微米(mi)以下的(de)煤(mei)粉(fen)(fen),用預熱空氣噴入爐膛經(jing)(jing)燃(ran)(ran)燒(shao)形成(cheng)懸浮狀態,產(chan)生混雜(za)有大(da)量不燃(ran)(ran)物的(de)高溫(wen)煙(yan)氣,經(jing)(jing)集塵裝(zhuang)置捕集就(jiu)得到了(le)粉(fen)(fen)煤(mei)灰(hui)。粉(fen)(fen)煤(mei)灰(hui)的(de)化學組成(cheng)與粘(zhan)土(tu)質(zhi)相似,主要成(cheng)分(fen)為(wei)二(er)氧化硅、三氧化二(er)鋁、三氧化二(er)鐵、氧化鈣和(he)未燃(ran)(ran)盡(jin)碳。
工作原理
濕粉煤(mei)灰由(you)供(gong)料(liao)(liao)(liao)(liao)(liao)裝置進(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)內層(ceng)(ceng)(ceng)(ceng)(ceng),實現順流烘干, 粉煤(mei)灰在(zai)(zai)(zai)內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)抄板下不斷(duan)抄起、散落呈(cheng)(cheng)螺旋行(xing)(xing)進(jin)(jin)式實現熱(re)交(jiao)換,物(wu)料(liao)(liao)(liao)(liao)(liao)移動至內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)另一端(duan)進(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)逆流烘干,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin),呈(cheng)(cheng)進(jin)(jin)兩步退(tui)一步的(de)(de)行(xing)(xing)進(jin)(jin)方式,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既(ji)充分(fen)吸(xi)收(shou)內層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發的(de)(de)熱(re)量,又(you)吸(xi)收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)熱(re)量,同時又(you)延長了干燥(zao)時間,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)此達到(dao)干燥(zao)狀(zhuang)態。物(wu)料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另一端(duan)而落入外層(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)內呈(cheng)(cheng)矩形(xing)多回路方式行(xing)(xing)進(jin)(jin),達到(dao)干燥(zao)效(xiao)果(guo)的(de)(de)物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)熱(re)風作用下快(kuai)速行(xing)(xing)進(jin)(jin)排出滾筒(tong),沒有(you)達到(dao)干燥(zao)效(xiao)果(guo)的(de)(de)濕物(wu)料(liao)(liao)(liao)(liao)(liao)因自重(zhong)而不能快(kuai)速行(xing)(xing)進(jin)(jin),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)此矩形(xing)抄板內進(jin)(jin)行(xing)(xing)充分(fen)干燥(zao),由(you)此達到(dao)干燥(zao)效(xiao)果(guo),完(wan)成(cheng)干燥(zao)過程。
設備特點(dian)
該設(she)備(bei)與其他干燥設(she)備(bei)相比(bi),生(sheng)產能力大,可連續操(cao)作(zuo)(zuo); 結構簡單(dan),操(cao)作(zuo)(zuo)方便(bian);故障少,維修費用低;適用范圍廣,流體阻力小(xiao),可以用它干燥顆料(liao)狀(zhuang)物料(liao),對于那些附著性(xing)大的(de)物料(liao)也(ye)很有(you)利;操(cao)作(zuo)(zuo)彈性(xing)大,生(sheng)產上允許產品(pin)的(de)流量(liang)有(you)較大波動范圍,不會影(ying)響產品(pin)的(de)質量(liang);清掃容易。