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)燒煤(mei)的(de)發電(dian)廠(chang)將煤(mei)磨成100微米以下(xia)的(de)煤(mei)粉,用預(yu)熱空氣噴入爐膛經燃(ran)燒形成懸浮狀態(tai),產生(sheng)混(hun)雜有大量不燃(ran)物的(de)高溫煙氣,經集塵裝置捕(bu)集就得到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)學(xue)組成與粘土(tu)質相似,主要成分為二氧化(hua)硅、三(san)氧化(hua)二鋁、三(san)氧化(hua)二鐵、氧化(hua)鈣和未(wei)燃(ran)盡碳。
工作原理
濕粉煤灰由(you)供料(liao)裝置進(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),實現順流烘干(gan)(gan), 粉煤灰在內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)抄(chao)板下(xia)不斷抄(chao)起、散(san)落呈螺旋行(xing)(xing)(xing)進(jin)式實現熱(re)交換,物(wu)料(liao)移動至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)另一(yi)端進(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)行(xing)(xing)(xing)逆(ni)流烘干(gan)(gan),物(wu)料(liao)在中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)不斷地(di)被反復揚進(jin),呈進(jin)兩(liang)步退一(yi)步的(de)(de)(de)行(xing)(xing)(xing)進(jin)方式,物(wu)料(liao)在中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)既(ji)充(chong)分吸(xi)收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒散(san)發的(de)(de)(de)熱(re)量(liang),又吸(xi)收中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)(de)熱(re)量(liang),同時(shi)又延長(chang)了(le)干(gan)(gan)燥(zao)時(shi)間,物(wu)料(liao)在此(ci)達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)狀態。物(wu)料(liao)行(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端而落入外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)料(liao)在外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒內(nei)(nei)呈矩形多回路方式行(xing)(xing)(xing)進(jin),達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)效果的(de)(de)(de)物(wu)料(liao)在熱(re)風作用下(xia)快速行(xing)(xing)(xing)進(jin)排出(chu)滾(gun)筒,沒有(you)達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)效果的(de)(de)(de)濕物(wu)料(liao)因自重(zhong)而不能快速行(xing)(xing)(xing)進(jin),物(wu)料(liao)在此(ci)矩形抄(chao)板內(nei)(nei)進(jin)行(xing)(xing)(xing)充(chong)分干(gan)(gan)燥(zao),由(you)此(ci)達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)效果,完成干(gan)(gan)燥(zao)過程。
設備特點
該設備與其他干燥設備相比,生產能力大(da)(da),可(ke)連續操作(zuo); 結(jie)構(gou)簡(jian)單,操作(zuo)方便;故障少,維修費用(yong)低(di);適用(yong)范圍(wei)廣,流體阻(zu)力小,可(ke)以(yi)用(yong)它干燥顆料(liao)狀物料(liao),對于那(nei)些附著性大(da)(da)的(de)物料(liao)也很有(you)利;操作(zuo)彈(dan)性大(da)(da),生產上(shang)允許產品的(de)流量有(you)較大(da)(da)波(bo)動范圍(wei),不會影響(xiang)產品的(de)質量;清掃容易。