煤(mei)粉灰烘干機是煤(mei)粉經高(gao)溫燃燒后形成的一種似火山灰質混合材料。
它是燃(ran)(ran)燒煤(mei)的(de)發電廠(chang)將煤(mei)磨成100微(wei)米以下的(de)煤(mei)粉(fen),用預熱空氣噴入爐(lu)膛經燃(ran)(ran)燒形(xing)成懸浮(fu)狀態,產生混雜有大量不燃(ran)(ran)物的(de)高溫煙氣,經集(ji)塵裝(zhuang)置捕(bu)集(ji)就得到了粉(fen)煤(mei)灰(hui)。粉(fen)煤(mei)灰(hui)的(de)化學組成與粘(zhan)土質(zhi)相(xiang)似(si),主(zhu)要成分(fen)為二氧(yang)(yang)化硅、三氧(yang)(yang)化二鋁、三氧(yang)(yang)化二鐵、氧(yang)(yang)化鈣和未燃(ran)(ran)盡碳。
工作原理
濕(shi)(shi)粉(fen)煤(mei)灰(hui)由供料(liao)裝置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的內(nei)層(ceng)(ceng)(ceng)(ceng),實現順流(liu)烘干, 粉(fen)煤(mei)灰(hui)在(zai)(zai)(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的抄板下不(bu)(bu)斷(duan)抄起、散落呈(cheng)螺旋行(xing)進(jin)(jin)式(shi)實現熱交換,物(wu)料(liao)移動至內(nei)層(ceng)(ceng)(ceng)(ceng)的另(ling)一(yi)端(duan)進(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)逆流(liu)烘干,物(wu)料(liao)在(zai)(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)(bu)斷(duan)地(di)被(bei)反復揚(yang)進(jin)(jin),呈(cheng)進(jin)(jin)兩步退一(yi)步的行(xing)進(jin)(jin)方(fang)式(shi),物(wu)料(liao)在(zai)(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸(xi)收(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)散發(fa)的熱量,又吸(xi)收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的熱量,同時(shi)又延長了干燥(zao)(zao)時(shi)間(jian),物(wu)料(liao)在(zai)(zai)(zai)(zai)此達(da)(da)到干燥(zao)(zao)狀態。物(wu)料(liao)行(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一(yi)端(duan)而落入(ru)外層(ceng)(ceng)(ceng)(ceng),物(wu)料(liao)在(zai)(zai)(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)內(nei)呈(cheng)矩形多回路方(fang)式(shi)行(xing)進(jin)(jin),達(da)(da)到干燥(zao)(zao)效(xiao)(xiao)果的物(wu)料(liao)在(zai)(zai)(zai)(zai)熱風作用下快速行(xing)進(jin)(jin)排出滾筒(tong)(tong),沒有達(da)(da)到干燥(zao)(zao)效(xiao)(xiao)果的濕(shi)(shi)物(wu)料(liao)因(yin)自重(zhong)而不(bu)(bu)能快速行(xing)進(jin)(jin),物(wu)料(liao)在(zai)(zai)(zai)(zai)此矩形抄板內(nei)進(jin)(jin)行(xing)充分干燥(zao)(zao),由此達(da)(da)到干燥(zao)(zao)效(xiao)(xiao)果,完成干燥(zao)(zao)過程。
設備特(te)點
該(gai)設備與其他(ta)干燥(zao)設備相比,生產能(neng)力(li)(li)大,可(ke)連續操作(zuo); 結構簡單,操作(zuo)方便(bian);故障少,維(wei)修費(fei)用低;適(shi)用范圍(wei)廣,流體阻力(li)(li)小,可(ke)以用它(ta)干燥(zao)顆料狀物料,對(dui)于那(nei)些附著性大的(de)物料也很有利;操作(zuo)彈性大,生產上允(yun)許產品的(de)流量有較大波動范圍(wei),不會影響產品的(de)質量;清掃容(rong)易。