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)燒(shao)煤(mei)的發(fa)電廠將煤(mei)磨成(cheng)(cheng)(cheng)100微(wei)米以下(xia)的煤(mei)粉(fen)，用預熱(re)空氣(qi)噴(pen)入爐膛經燃(ran)燒(shao)形成(cheng)(cheng)(cheng)懸浮狀態，產生混(hun)雜有(you)大量不燃(ran)物(wu)的高溫煙氣(qi)，經集塵裝置捕集就得(de)到了粉(fen)煤(mei)灰(hui)。粉(fen)煤(mei)灰(hui)的化學組成(cheng)(cheng)(cheng)與粘土質(zhi)相似，主要(yao)成(cheng)(cheng)(cheng)分(fen)為二(er)(er)氧化硅(gui)、三(san)氧化二(er)(er)鋁、三(san)氧化二(er)(er)鐵、氧化鈣(gai)和(he)未(wei)燃(ran)盡碳。

工作(zuo)原理

濕(shi)粉煤(mei)灰由(you)供(gong)料(liao)(liao)裝置(zhi)進(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的內(nei)層(ceng)(ceng)(ceng)(ceng),實(shi)現順流(liu)烘(hong)干(gan)(gan), 粉煤(mei)灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的抄板下不斷抄起、散(san)落(luo)呈螺旋(xuan)行(xing)進(jin)(jin)(jin)式(shi)實(shi)現熱(re)交(jiao)換(huan)，物(wu)料(liao)(liao)移動至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)的另(ling)一(yi)(yi)端(duan)進(jin)(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)(jin)行(xing)逆流(liu)烘(hong)干(gan)(gan)，物(wu)料(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不斷地(di)被反復揚進(jin)(jin)(jin)，呈進(jin)(jin)(jin)兩步退一(yi)(yi)步的行(xing)進(jin)(jin)(jin)方式(shi)，物(wu)料(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既充分(fen)吸收內(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)散(san)發(fa)的熱(re)量，又吸收中(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的熱(re)量，同時(shi)(shi)又延長了干(gan)(gan)燥(zao)時(shi)(shi)間，物(wu)料(liao)(liao)在(zai)(zai)此(ci)(ci)達到(dao)(dao)干(gan)(gan)燥(zao)狀態。物(wu)料(liao)(liao)行(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一(yi)(yi)端(duan)而落(luo)入(ru)外(wai)層(ceng)(ceng)(ceng)(ceng)，物(wu)料(liao)(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)呈矩(ju)形多回路方式(shi)行(xing)進(jin)(jin)(jin)，達到(dao)(dao)干(gan)(gan)燥(zao)效果的物(wu)料(liao)(liao)在(zai)(zai)熱(re)風作用下快(kuai)速行(xing)進(jin)(jin)(jin)排出滾(gun)筒(tong)(tong)(tong)，沒有達到(dao)(dao)干(gan)(gan)燥(zao)效果的濕(shi)物(wu)料(liao)(liao)因自重而不能快(kuai)速行(xing)進(jin)(jin)(jin)，物(wu)料(liao)(liao)在(zai)(zai)此(ci)(ci)矩(ju)形抄板內(nei)進(jin)(jin)(jin)行(xing)充分(fen)干(gan)(gan)燥(zao)，由(you)此(ci)(ci)達到(dao)(dao)干(gan)(gan)燥(zao)效果，完成(cheng)干(gan)(gan)燥(zao)過(guo)程。

設(she)備特點(dian)

該設(she)備(bei)與其他干(gan)燥設(she)備(bei)相比，生產能力大，可連續(xu)操作； 結構簡單(dan)，操作方便(bian)；故障少，維修費(fei)用(yong)低；適用(yong)范圍廣，流體阻(zu)力小，可以用(yong)它(ta)干(gan)燥顆料(liao)狀物料(liao)，對于那(nei)些附著性(xing)(xing)大的(de)物料(liao)也很(hen)有利(li)；操作彈(dan)性(xing)(xing)大，生產上允許(xu)產品的(de)流量有較(jiao)大波動范圍，不會影響產品的(de)質(zhi)量；清掃(sao)容易。