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)是燃(ran)燒煤(mei)的(de)發電廠(chang)將煤(mei)磨成(cheng)100微米以下的(de)煤(mei)粉，用預熱空氣噴(pen)入爐(lu)膛(tang)經燃(ran)燒形(xing)成(cheng)懸浮(fu)狀態(tai)，產生混雜有(you)大量(liang)不燃(ran)物的(de)高溫煙(yan)氣，經集塵裝(zhuang)置捕集就得到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)學組成(cheng)與粘土(tu)質(zhi)相似，主要成(cheng)分為(wei)二氧(yang)化(hua)硅、三氧(yang)化(hua)二鋁、三氧(yang)化(hua)二鐵、氧(yang)化(hua)鈣和未燃(ran)盡碳。

工(gong)作原理

濕(shi)粉(fen)煤灰由供料(liao)(liao)裝(zhuang)置進(jin)(jin)(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾筒(tong)的內(nei)層(ceng)(ceng)(ceng),實現順流烘(hong)干(gan), 粉(fen)煤灰在(zai)內(nei)層(ceng)(ceng)(ceng)的抄板下不斷抄起、散落(luo)呈螺旋(xuan)行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)(jin)式實現熱(re)交換，物(wu)料(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)的另一端(duan)(duan)進(jin)(jin)(jin)(jin)(jin)入(ru)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)，進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)(xing)逆流烘(hong)干(gan)，物(wu)料(liao)(liao)在(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)不斷地(di)被(bei)反復揚進(jin)(jin)(jin)(jin)(jin)，呈進(jin)(jin)(jin)(jin)(jin)兩步(bu)退一步(bu)的行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)(jin)方式，物(wu)料(liao)(liao)在(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)既(ji)充分吸收(shou)內(nei)層(ceng)(ceng)(ceng)滾筒(tong)散發的熱(re)量(liang)，又吸收(shou)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)滾筒(tong)的熱(re)量(liang)，同時(shi)(shi)又延長了干(gan)燥(zao)時(shi)(shi)間，物(wu)料(liao)(liao)在(zai)此(ci)達到干(gan)燥(zao)狀態。物(wu)料(liao)(liao)行(xing)(xing)(xing)至中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)另一端(duan)(duan)而落(luo)入(ru)外層(ceng)(ceng)(ceng)，物(wu)料(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈矩(ju)形(xing)多回路(lu)方式行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)(jin)，達到干(gan)燥(zao)效果的物(wu)料(liao)(liao)在(zai)熱(re)風作(zuo)用下快(kuai)速行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)(jin)排(pai)出滾筒(tong)，沒(mei)有(you)達到干(gan)燥(zao)效果的濕(shi)物(wu)料(liao)(liao)因自重而不能快(kuai)速行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)(jin)，物(wu)料(liao)(liao)在(zai)此(ci)矩(ju)形(xing)抄板內(nei)進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)(xing)充分干(gan)燥(zao)，由此(ci)達到干(gan)燥(zao)效果，完成干(gan)燥(zao)過(guo)程。

設備特(te)點

該設(she)備與其他干(gan)燥(zao)設(she)備相(xiang)比，生產能(neng)力(li)大，可(ke)連續操作(zuo)； 結構(gou)簡單，操作(zuo)方便(bian)；故障少，維修費用低；適用范圍(wei)廣(guang)，流體阻(zu)力(li)小，可(ke)以用它干(gan)燥(zao)顆料(liao)狀物料(liao)，對于那些附著性大的物料(liao)也很(hen)有利；操作(zuo)彈(dan)性大，生產上允許產品(pin)的流量(liang)有較大波動范圍(wei)，不會影響產品(pin)的質量(liang)；清掃容易。