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。
它是燃燒(shao)煤(mei)的(de)發電廠將煤(mei)磨成100微米以下的(de)煤(mei)粉,用(yong)預熱空氣噴入爐膛經(jing)燃燒(shao)形成懸浮狀態,產(chan)生混雜有大量不燃物的(de)高溫煙氣,經(jing)集(ji)塵裝置捕集(ji)就得到(dao)了(le)粉煤(mei)灰(hui)。粉煤(mei)灰(hui)的(de)化學組成與粘土質相似,主要成分為二(er)(er)氧(yang)(yang)化硅(gui)、三(san)氧(yang)(yang)化二(er)(er)鋁、三(san)氧(yang)(yang)化二(er)(er)鐵、氧(yang)(yang)化鈣和(he)未燃盡碳。
工作原理
濕粉(fen)煤(mei)灰(hui)由供料(liao)(liao)裝(zhuang)置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)內層(ceng)(ceng)(ceng)(ceng),實(shi)現順流烘干(gan)(gan), 粉(fen)煤(mei)灰(hui)在內層(ceng)(ceng)(ceng)(ceng)的(de)抄板(ban)下不(bu)(bu)斷(duan)抄起、散落呈螺旋行進(jin)(jin)式(shi)實(shi)現熱交換,物(wu)(wu)(wu)料(liao)(liao)移動至內層(ceng)(ceng)(ceng)(ceng)的(de)另(ling)一端進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行逆流烘干(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)(bu)斷(duan)地(di)被反復揚進(jin)(jin),呈進(jin)(jin)兩(liang)步退一步的(de)行進(jin)(jin)方式(shi),物(wu)(wu)(wu)料(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸收(shou)內層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)散發的(de)熱量(liang),又吸收(shou)中(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)熱量(liang),同時又延長了(le)干(gan)(gan)燥(zao)時間,物(wu)(wu)(wu)料(liao)(liao)在此(ci)達(da)到干(gan)(gan)燥(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)行至中(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一端而落入(ru)外層(ceng)(ceng)(ceng)(ceng),物(wu)(wu)(wu)料(liao)(liao)在外層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)內呈矩形(xing)多(duo)回路(lu)方式(shi)行進(jin)(jin),達(da)到干(gan)(gan)燥(zao)效(xiao)果(guo)(guo)的(de)物(wu)(wu)(wu)料(liao)(liao)在熱風作(zuo)用下快速(su)行進(jin)(jin)排(pai)出(chu)滾(gun)(gun)筒(tong)(tong),沒(mei)有達(da)到干(gan)(gan)燥(zao)效(xiao)果(guo)(guo)的(de)濕物(wu)(wu)(wu)料(liao)(liao)因自重而不(bu)(bu)能快速(su)行進(jin)(jin),物(wu)(wu)(wu)料(liao)(liao)在此(ci)矩形(xing)抄板(ban)內進(jin)(jin)行充分干(gan)(gan)燥(zao),由此(ci)達(da)到干(gan)(gan)燥(zao)效(xiao)果(guo)(guo),完成干(gan)(gan)燥(zao)過程。
設(she)備特點
該設備與其他(ta)干燥設備相比,生(sheng)(sheng)產(chan)(chan)能力大,可連(lian)續操(cao)作(zuo); 結構簡單(dan),操(cao)作(zuo)方便(bian);故障少,維修費用低;適(shi)用范圍廣,流體阻(zu)力小,可以用它干燥顆(ke)料狀物(wu)料,對于那些附著性大的(de)物(wu)料也很有(you)利;操(cao)作(zuo)彈(dan)性大,生(sheng)(sheng)產(chan)(chan)上允許產(chan)(chan)品的(de)流量有(you)較(jiao)大波動范圍,不會(hui)影響產(chan)(chan)品的(de)質量;清(qing)掃容易。