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。
它是燃燒煤的(de)發(fa)電廠將煤磨(mo)成100微米以(yi)下的(de)煤粉(fen),用預熱空氣(qi)噴入爐(lu)膛經(jing)燃燒形成懸浮狀態,產生混雜有大量(liang)不燃物的(de)高溫煙(yan)氣(qi),經(jing)集塵(chen)裝置捕(bu)集就得到了(le)粉(fen)煤灰。粉(fen)煤灰的(de)化(hua)學組成與粘土質相似,主要成分為二(er)氧化(hua)硅、三氧化(hua)二(er)鋁、三氧化(hua)二(er)鐵、氧化(hua)鈣和未燃盡碳。
工作原理
濕(shi)(shi)粉煤灰由(you)(you)供(gong)料(liao)(liao)(liao)(liao)(liao)裝(zhuang)置進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng),實現順流(liu)烘干(gan), 粉煤灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)抄板(ban)(ban)下不(bu)斷抄起、散落呈(cheng)螺(luo)旋行(xing)(xing)進(jin)(jin)(jin)(jin)式實現熱(re)交換,物(wu)料(liao)(liao)(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)另一(yi)端(duan)(duan)進(jin)(jin)(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)逆流(liu)烘干(gan),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)斷地(di)被反復揚進(jin)(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)(jin)兩步退一(yi)步的(de)(de)(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方(fang)式,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既(ji)充分(fen)吸收內(nei)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)散發(fa)的(de)(de)(de)熱(re)量,又吸收中(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)(de)(de)熱(re)量,同時又延長(chang)了干(gan)燥(zao)時間(jian),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)達(da)(da)到(dao)(dao)干(gan)燥(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)(ceng)另一(yi)端(duan)(duan)而落入外層(ceng)(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)內(nei)呈(cheng)矩形(xing)多回(hui)路方(fang)式行(xing)(xing)進(jin)(jin)(jin)(jin),達(da)(da)到(dao)(dao)干(gan)燥(zao)效(xiao)果的(de)(de)(de)物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)熱(re)風(feng)作用下快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin)排出滾筒(tong)(tong),沒有達(da)(da)到(dao)(dao)干(gan)燥(zao)效(xiao)果的(de)(de)(de)濕(shi)(shi)物(wu)料(liao)(liao)(liao)(liao)(liao)因自重而不(bu)能快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)矩形(xing)抄板(ban)(ban)內(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充分(fen)干(gan)燥(zao),由(you)(you)此(ci)達(da)(da)到(dao)(dao)干(gan)燥(zao)效(xiao)果,完(wan)成(cheng)干(gan)燥(zao)過程。
設備特點
該設備(bei)與其他干燥設備(bei)相比,生(sheng)產能(neng)力大(da),可連續操(cao)作(zuo)(zuo); 結(jie)構(gou)簡單(dan),操(cao)作(zuo)(zuo)方便;故障少,維修(xiu)費用(yong)低;適用(yong)范圍廣,流體阻(zu)力小,可以用(yong)它(ta)干燥顆料(liao)狀物料(liao),對于那些附著(zhu)性(xing)大(da)的(de)物料(liao)也很有利;操(cao)作(zuo)(zuo)彈性(xing)大(da),生(sheng)產上(shang)允許產品的(de)流量有較大(da)波動范圍,不會影響(xiang)產品的(de)質量;清(qing)掃容易。