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(shi)燃(ran)燒(shao)煤的(de)發電廠將煤磨成100微米以下的(de)煤粉，用預熱空氣噴入爐膛(tang)經燃(ran)燒(shao)形(xing)成懸浮狀(zhuang)態，產生混(hun)雜有大量不燃(ran)物(wu)的(de)高溫(wen)煙(yan)氣，經集塵(chen)裝置捕集就(jiu)得(de)到了粉煤灰。粉煤灰的(de)化(hua)學組成與粘土質相(xiang)似，主要成分為二(er)氧(yang)(yang)化(hua)硅、三氧(yang)(yang)化(hua)二(er)鋁、三氧(yang)(yang)化(hua)二(er)鐵、氧(yang)(yang)化(hua)鈣和未燃(ran)盡(jin)碳。

工作原理(li)

濕粉煤(mei)灰由供料(liao)裝置進(jin)(jin)(jin)(jin)(jin)(jin)入(ru)(ru)三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng),實(shi)現順流烘(hong)干(gan), 粉煤(mei)灰在(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)抄板(ban)下(xia)(xia)不(bu)斷抄起、散落(luo)呈螺旋(xuan)行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)(jin)式(shi)(shi)實(shi)現熱(re)交換，物料(liao)移(yi)動至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)另一(yi)端進(jin)(jin)(jin)(jin)(jin)(jin)入(ru)(ru)中(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)(jin)(jin)(jin)(jin)行(xing)(xing)逆流烘(hong)干(gan)，物料(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反復(fu)揚進(jin)(jin)(jin)(jin)(jin)(jin)，呈進(jin)(jin)(jin)(jin)(jin)(jin)兩步退一(yi)步的(de)(de)行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)(jin)方(fang)式(shi)(shi)，物料(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既充(chong)(chong)分(fen)吸收(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發的(de)(de)熱(re)量(liang)，又(you)吸收(shou)中(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)熱(re)量(liang)，同時又(you)延長(chang)了干(gan)燥(zao)時間(jian)，物料(liao)在(zai)此達到(dao)干(gan)燥(zao)狀態。物料(liao)行(xing)(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)另一(yi)端而(er)落(luo)入(ru)(ru)外層(ceng)(ceng)(ceng)(ceng)，物料(liao)在(zai)外層(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈矩形(xing)多回路方(fang)式(shi)(shi)行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)(jin)，達到(dao)干(gan)燥(zao)效果的(de)(de)物料(liao)在(zai)熱(re)風作用下(xia)(xia)快速行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)(jin)排出(chu)滾筒(tong)，沒有達到(dao)干(gan)燥(zao)效果的(de)(de)濕物料(liao)因自重(zhong)而(er)不(bu)能(neng)快速行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)(jin)，物料(liao)在(zai)此矩形(xing)抄板(ban)內(nei)進(jin)(jin)(jin)(jin)(jin)(jin)行(xing)(xing)充(chong)(chong)分(fen)干(gan)燥(zao)，由此達到(dao)干(gan)燥(zao)效果，完成干(gan)燥(zao)過程。

設備特(te)點

該(gai)設(she)備與其他(ta)干燥設(she)備相比(bi)，生(sheng)產(chan)能力大(da)(da)，可(ke)連(lian)續(xu)操(cao)作； 結構簡(jian)單(dan)，操(cao)作方便(bian)；故障少，維修(xiu)費(fei)用(yong)(yong)低；適用(yong)(yong)范(fan)圍廣，流體阻(zu)力小，可(ke)以用(yong)(yong)它(ta)干燥顆料狀(zhuang)物(wu)料，對于那些附著性大(da)(da)的物(wu)料也很(hen)有利；操(cao)作彈性大(da)(da)，生(sheng)產(chan)上(shang)允許產(chan)品的流量有較大(da)(da)波動范(fan)圍，不(bu)會影響產(chan)品的質量；清掃(sao)容易。