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)(ran)燒(shao)煤(mei)的(de)發電(dian)廠將煤(mei)磨(mo)成(cheng)100微米以下的(de)煤(mei)粉,用預熱空氣(qi)(qi)噴入(ru)爐膛經(jing)燃(ran)(ran)燒(shao)形成(cheng)懸浮狀態,產生混雜(za)有大(da)量不燃(ran)(ran)物的(de)高溫煙氣(qi)(qi),經(jing)集塵裝置捕集就(jiu)得(de)到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)學(xue)組成(cheng)與(yu)粘(zhan)土質相似,主要成(cheng)分為二(er)(er)氧化(hua)硅、三氧化(hua)二(er)(er)鋁(lv)、三氧化(hua)二(er)(er)鐵、氧化(hua)鈣和未燃(ran)(ran)盡碳。
工作原(yuan)理(li)
濕(shi)粉煤(mei)灰(hui)(hui)由供料(liao)(liao)(liao)(liao)裝置進入(ru)三層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)內層(ceng)(ceng)(ceng),實現順流烘干(gan), 粉煤(mei)灰(hui)(hui)在(zai)(zai)內層(ceng)(ceng)(ceng)的(de)抄(chao)(chao)板下(xia)不(bu)斷(duan)抄(chao)(chao)起(qi)、散(san)落呈(cheng)(cheng)螺旋行(xing)(xing)(xing)進式(shi)實現熱交換,物(wu)料(liao)(liao)(liao)(liao)移動至內層(ceng)(ceng)(ceng)的(de)另一端(duan)進入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng),進行(xing)(xing)(xing)逆(ni)流烘干(gan),物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)不(bu)斷(duan)地(di)被反復揚進,呈(cheng)(cheng)進兩步退一步的(de)行(xing)(xing)(xing)進方(fang)式(shi),物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)既充分吸收(shou)內層(ceng)(ceng)(ceng)滾(gun)筒(tong)散(san)發(fa)的(de)熱量,又吸收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)熱量,同時又延(yan)長了(le)干(gan)燥時間,物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)此達到干(gan)燥狀態。物(wu)料(liao)(liao)(liao)(liao)行(xing)(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)另一端(duan)而落入(ru)外層(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)滾(gun)筒(tong)內呈(cheng)(cheng)矩形多回路方(fang)式(shi)行(xing)(xing)(xing)進,達到干(gan)燥效果(guo)(guo)的(de)物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)熱風作用下(xia)快速行(xing)(xing)(xing)進排出滾(gun)筒(tong),沒有達到干(gan)燥效果(guo)(guo)的(de)濕(shi)物(wu)料(liao)(liao)(liao)(liao)因自(zi)重而不(bu)能快速行(xing)(xing)(xing)進,物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)此矩形抄(chao)(chao)板內進行(xing)(xing)(xing)充分干(gan)燥,由此達到干(gan)燥效果(guo)(guo),完成干(gan)燥過(guo)程。
設備(bei)特(te)點
該設備與其他干(gan)燥設備相比,生產(chan)(chan)(chan)能力大,可(ke)連(lian)續操(cao)作; 結構簡(jian)單,操(cao)作方便;故(gu)障少,維修(xiu)費(fei)用(yong)(yong)低;適用(yong)(yong)范圍廣,流(liu)體阻力小(xiao),可(ke)以用(yong)(yong)它干(gan)燥顆(ke)料(liao)狀物料(liao),對于(yu)那些附(fu)著性大的(de)(de)物料(liao)也很(hen)有利;操(cao)作彈(dan)性大,生產(chan)(chan)(chan)上允許產(chan)(chan)(chan)品的(de)(de)流(liu)量有較大波動范圍,不會影響產(chan)(chan)(chan)品的(de)(de)質(zhi)量;清掃容易。