煤(mei)粉灰烘干機是(shi)煤(mei)粉經高溫(wen)燃燒后形(xing)成(cheng)的一種似火山(shan)灰質(zhi)混合材料。
它是燃燒(shao)煤(mei)的發(fa)電(dian)廠將煤(mei)磨(mo)成(cheng)(cheng)100微米以下的煤(mei)粉,用(yong)預熱空(kong)氣噴入爐膛經(jing)燃燒(shao)形(xing)成(cheng)(cheng)懸浮狀態(tai),產(chan)生(sheng)混雜(za)有大量不(bu)燃物的高溫煙氣,經(jing)集塵裝置捕集就得到了粉煤(mei)灰。粉煤(mei)灰的化(hua)(hua)學組成(cheng)(cheng)與粘(zhan)土質(zhi)相似,主要成(cheng)(cheng)分為二(er)氧化(hua)(hua)硅、三(san)氧化(hua)(hua)二(er)鋁、三(san)氧化(hua)(hua)二(er)鐵、氧化(hua)(hua)鈣和(he)未燃盡碳。
工作原理
濕粉(fen)煤灰(hui)由(you)供(gong)料(liao)(liao)(liao)(liao)裝置進(jin)入三層(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)內(nei)層(ceng)(ceng)(ceng),實(shi)現(xian)順流(liu)烘(hong)干, 粉(fen)煤灰(hui)在內(nei)層(ceng)(ceng)(ceng)的(de)抄(chao)板下不(bu)(bu)(bu)斷抄(chao)起、散落呈螺旋行進(jin)式實(shi)現(xian)熱(re)(re)(re)交換,物(wu)(wu)料(liao)(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)的(de)另(ling)一端(duan)進(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng),進(jin)行逆(ni)流(liu)烘(hong)干,物(wu)(wu)料(liao)(liao)(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)不(bu)(bu)(bu)斷地被反復揚進(jin),呈進(jin)兩步退一步的(de)行進(jin)方式,物(wu)(wu)料(liao)(liao)(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)既(ji)充分吸收內(nei)層(ceng)(ceng)(ceng)滾筒(tong)(tong)散發的(de)熱(re)(re)(re)量,又(you)(you)吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)熱(re)(re)(re)量,同時又(you)(you)延(yan)長了干燥(zao)(zao)時間,物(wu)(wu)料(liao)(liao)(liao)(liao)在此達(da)到干燥(zao)(zao)狀(zhuang)態。物(wu)(wu)料(liao)(liao)(liao)(liao)行至中(zhong)(zhong)層(ceng)(ceng)(ceng)另(ling)一端(duan)而落入外(wai)層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)(liao)在外(wai)層(ceng)(ceng)(ceng)滾筒(tong)(tong)內(nei)呈矩形多(duo)回路方式行進(jin),達(da)到干燥(zao)(zao)效果(guo)的(de)物(wu)(wu)料(liao)(liao)(liao)(liao)在熱(re)(re)(re)風(feng)作用下快速行進(jin)排出滾筒(tong)(tong),沒(mei)有(you)達(da)到干燥(zao)(zao)效果(guo)的(de)濕物(wu)(wu)料(liao)(liao)(liao)(liao)因自重而不(bu)(bu)(bu)能快速行進(jin),物(wu)(wu)料(liao)(liao)(liao)(liao)在此矩形抄(chao)板內(nei)進(jin)行充分干燥(zao)(zao),由(you)此達(da)到干燥(zao)(zao)效果(guo),完成干燥(zao)(zao)過(guo)程。
設備特點
該設備(bei)與其他干燥(zao)設備(bei)相比,生(sheng)(sheng)產(chan)能力大(da),可(ke)連續操作(zuo); 結構(gou)簡單,操作(zuo)方便(bian);故(gu)障少,維修費用低;適用范圍(wei)廣,流體阻(zu)力小,可(ke)以用它干燥(zao)顆料(liao)狀物料(liao),對于那些附(fu)著性大(da)的(de)物料(liao)也很有利(li);操作(zuo)彈性大(da),生(sheng)(sheng)產(chan)上允許(xu)產(chan)品的(de)流量有較(jiao)大(da)波(bo)動范圍(wei),不(bu)會(hui)影響產(chan)品的(de)質量;清掃(sao)容易。