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)(mei)的(de)發電廠將煤(mei)(mei)磨(mo)成(cheng)(cheng)100微(wei)米以下的(de)煤(mei)(mei)粉(fen),用預熱空氣噴入爐膛經燃(ran)燒(shao)形成(cheng)(cheng)懸浮狀態,產生混雜有大量不燃(ran)物的(de)高(gao)溫煙氣,經集(ji)(ji)塵裝置(zhi)捕(bu)集(ji)(ji)就得(de)到了粉(fen)煤(mei)(mei)灰(hui)。粉(fen)煤(mei)(mei)灰(hui)的(de)化學組(zu)成(cheng)(cheng)與粘土質(zhi)相似,主要成(cheng)(cheng)分為二(er)氧化硅、三氧化二(er)鋁、三氧化二(er)鐵、氧化鈣和(he)未(wei)燃(ran)盡(jin)碳。
工作(zuo)原理
濕粉(fen)煤(mei)灰由(you)供料(liao)裝(zhuang)置進(jin)(jin)入(ru)(ru)三層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)(de)內層(ceng)(ceng)(ceng)(ceng)(ceng),實(shi)現順流烘(hong)干, 粉(fen)煤(mei)灰在內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)抄板下(xia)不(bu)斷(duan)抄起(qi)、散落(luo)(luo)呈螺旋行進(jin)(jin)式(shi)實(shi)現熱(re)交(jiao)換,物(wu)料(liao)移動(dong)至內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)另(ling)一端進(jin)(jin)入(ru)(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行逆流烘(hong)干,物(wu)料(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷(duan)地(di)被反復揚進(jin)(jin),呈進(jin)(jin)兩步退一步的(de)(de)(de)行進(jin)(jin)方式(shi),物(wu)料(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既充(chong)分(fen)(fen)吸(xi)收內層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)散發的(de)(de)(de)熱(re)量,又吸(xi)收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)(de)熱(re)量,同時又延長了干燥時間,物(wu)料(liao)在此(ci)達(da)到(dao)干燥狀態(tai)。物(wu)料(liao)行至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另(ling)一端而落(luo)(luo)入(ru)(ru)外層(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)料(liao)在外層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)內呈矩(ju)形多回路方式(shi)行進(jin)(jin),達(da)到(dao)干燥效果(guo)的(de)(de)(de)物(wu)料(liao)在熱(re)風作(zuo)用下(xia)快速(su)行進(jin)(jin)排(pai)出滾(gun)筒(tong)(tong),沒有達(da)到(dao)干燥效果(guo)的(de)(de)(de)濕物(wu)料(liao)因自重而不(bu)能快速(su)行進(jin)(jin),物(wu)料(liao)在此(ci)矩(ju)形抄板內進(jin)(jin)行充(chong)分(fen)(fen)干燥,由(you)此(ci)達(da)到(dao)干燥效果(guo),完(wan)成干燥過程。
設(she)備特(te)點(dian)
該(gai)設備與其(qi)他(ta)干燥(zao)設備相(xiang)比,生(sheng)產(chan)(chan)能力大,可連續操(cao)作; 結構簡單(dan),操(cao)作方便;故障少(shao),維修費用(yong)低;適用(yong)范(fan)圍廣(guang),流體阻力小,可以用(yong)它(ta)干燥(zao)顆料狀物料,對于那些(xie)附(fu)著性(xing)大的物料也很有利;操(cao)作彈性(xing)大,生(sheng)產(chan)(chan)上允(yun)許產(chan)(chan)品(pin)(pin)的流量(liang)有較大波動范(fan)圍,不會影響產(chan)(chan)品(pin)(pin)的質量(liang);清掃容(rong)易。