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)燒煤的(de)發電廠將煤磨成100微米以下(xia)的(de)煤粉，用預(yu)熱(re)空氣噴(pen)入爐膛經(jing)燃(ran)(ran)燒形(xing)成懸(xuan)浮(fu)狀態，產(chan)生混雜有大量不燃(ran)(ran)物的(de)高溫煙氣，經(jing)集(ji)塵裝置捕集(ji)就(jiu)得(de)到了粉煤灰。粉煤灰的(de)化(hua)(hua)學組成與粘土質相似(si)，主要(yao)成分(fen)為二氧(yang)化(hua)(hua)硅、三(san)(san)氧(yang)化(hua)(hua)二鋁(lv)、三(san)(san)氧(yang)化(hua)(hua)二鐵、氧(yang)化(hua)(hua)鈣和未燃(ran)(ran)盡碳。

工作(zuo)原理

濕粉煤灰由(you)供(gong)料(liao)裝置(zhi)進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)滾筒的內層(ceng)(ceng)(ceng),實現順流烘干(gan), 粉煤灰在(zai)(zai)內層(ceng)(ceng)(ceng)的抄(chao)板下不斷抄(chao)起、散落(luo)呈(cheng)(cheng)螺旋行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)式(shi)(shi)實現熱(re)交換，物(wu)(wu)料(liao)移動至內層(ceng)(ceng)(ceng)的另一(yi)(yi)端進(jin)(jin)(jin)(jin)入中層(ceng)(ceng)(ceng)，進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)逆流烘干(gan)，物(wu)(wu)料(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)不斷地被反(fan)復揚進(jin)(jin)(jin)(jin)，呈(cheng)(cheng)進(jin)(jin)(jin)(jin)兩(liang)步退一(yi)(yi)步的行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)方式(shi)(shi)，物(wu)(wu)料(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)既充(chong)分吸收(shou)內層(ceng)(ceng)(ceng)滾筒散發(fa)的熱(re)量(liang)，又吸收(shou)中層(ceng)(ceng)(ceng)滾筒的熱(re)量(liang)，同時又延長了干(gan)燥(zao)(zao)時間，物(wu)(wu)料(liao)在(zai)(zai)此達到(dao)干(gan)燥(zao)(zao)狀態(tai)。物(wu)(wu)料(liao)行(xing)(xing)(xing)(xing)(xing)至中層(ceng)(ceng)(ceng)另一(yi)(yi)端而落(luo)入外層(ceng)(ceng)(ceng)，物(wu)(wu)料(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)滾筒內呈(cheng)(cheng)矩形(xing)多回路方式(shi)(shi)行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)，達到(dao)干(gan)燥(zao)(zao)效(xiao)(xiao)果的物(wu)(wu)料(liao)在(zai)(zai)熱(re)風作用下快速行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)排出滾筒，沒(mei)有達到(dao)干(gan)燥(zao)(zao)效(xiao)(xiao)果的濕物(wu)(wu)料(liao)因自重而不能快速行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)，物(wu)(wu)料(liao)在(zai)(zai)此矩形(xing)抄(chao)板內進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)充(chong)分干(gan)燥(zao)(zao)，由(you)此達到(dao)干(gan)燥(zao)(zao)效(xiao)(xiao)果，完成(cheng)干(gan)燥(zao)(zao)過程。

設備特點

該設備與其他(ta)干燥(zao)設備相比，生產(chan)能(neng)力(li)大，可連續操作(zuo)； 結構簡單(dan)，操作(zuo)方便；故障少，維修費用低；適(shi)用范圍廣，流體阻力(li)小，可以(yi)用它干燥(zao)顆料狀物(wu)料，對于那(nei)些附著性大的(de)物(wu)料也很有利(li)；操作(zuo)彈(dan)性大，生產(chan)上允許產(chan)品(pin)的(de)流量有較大波動范圍，不(bu)會影響產(chan)品(pin)的(de)質量；清掃容易。