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)燒煤的(de)(de)發電廠將煤磨成(cheng)100微米以下的(de)(de)煤粉,用(yong)預熱空氣噴入爐膛經燃(ran)燒形成(cheng)懸浮(fu)狀態,產生混雜有大量不燃(ran)物的(de)(de)高溫(wen)煙氣,經集(ji)塵裝置(zhi)捕(bu)集(ji)就得到了粉煤灰。粉煤灰的(de)(de)化(hua)學組成(cheng)與粘土質相似,主要成(cheng)分為(wei)二氧(yang)(yang)化(hua)硅(gui)、三氧(yang)(yang)化(hua)二鋁、三氧(yang)(yang)化(hua)二鐵、氧(yang)(yang)化(hua)鈣和未燃(ran)盡碳。
工作原理
濕粉煤(mei)灰由供料裝置進(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),實現順流(liu)烘干(gan)(gan), 粉煤(mei)灰在(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)抄板下(xia)不(bu)斷抄起、散(san)落(luo)呈(cheng)螺(luo)旋行進(jin)式實現熱(re)交(jiao)換,物(wu)料移動(dong)至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)另一(yi)端(duan)進(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)行逆(ni)流(liu)烘干(gan)(gan),物(wu)料在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反復揚進(jin),呈(cheng)進(jin)兩(liang)步退一(yi)步的(de)(de)行進(jin)方式,物(wu)料在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)散(san)發的(de)(de)熱(re)量,又(you)吸收中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)熱(re)量,同(tong)時又(you)延(yan)長了干(gan)(gan)燥(zao)(zao)(zao)時間,物(wu)料在(zai)此(ci)達到(dao)干(gan)(gan)燥(zao)(zao)(zao)狀態。物(wu)料行至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端(duan)而(er)落(luo)入外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)料在(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈(cheng)矩形多(duo)回路方式行進(jin),達到(dao)干(gan)(gan)燥(zao)(zao)(zao)效(xiao)果的(de)(de)物(wu)料在(zai)熱(re)風(feng)作用下(xia)快速(su)行進(jin)排出(chu)滾筒(tong),沒有達到(dao)干(gan)(gan)燥(zao)(zao)(zao)效(xiao)果的(de)(de)濕物(wu)料因自(zi)重而(er)不(bu)能(neng)快速(su)行進(jin),物(wu)料在(zai)此(ci)矩形抄板內(nei)進(jin)行充分干(gan)(gan)燥(zao)(zao)(zao),由此(ci)達到(dao)干(gan)(gan)燥(zao)(zao)(zao)效(xiao)果,完成(cheng)干(gan)(gan)燥(zao)(zao)(zao)過程。
設(she)備(bei)特點(dian)
該設(she)備與其(qi)他干燥設(she)備相(xiang)比(bi),生產能(neng)力(li)(li)大,可連續操作; 結構簡單,操作方便;故障少,維(wei)修費用低;適用范(fan)圍廣,流體阻力(li)(li)小,可以用它干燥顆料(liao)狀(zhuang)物(wu)料(liao),對(dui)于那些(xie)附著性大的物(wu)料(liao)也(ye)很有利;操作彈性大,生產上允許產品的流量(liang)有較(jiao)大波(bo)動范(fan)圍,不會影響產品的質量(liang);清(qing)掃容易。