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(shi)燃(ran)燒(shao)煤的(de)發(fa)電廠將煤磨(mo)成100微米以下的(de)煤粉，用預熱(re)空氣噴入爐(lu)膛(tang)經燃(ran)燒(shao)形成懸浮狀態，產(chan)生混雜有大量不燃(ran)物的(de)高溫煙氣，經集(ji)(ji)塵裝置捕集(ji)(ji)就得到了粉煤灰。粉煤灰的(de)化(hua)學組成與粘土質相似，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)鈣和未燃(ran)盡碳(tan)。

工作(zuo)原理

濕粉煤灰由供料(liao)(liao)裝置進(jin)(jin)(jin)入三(san)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)內(nei)(nei)層(ceng)(ceng),實現(xian)順流烘干(gan)(gan)(gan)(gan), 粉煤灰在(zai)(zai)內(nei)(nei)層(ceng)(ceng)的(de)抄板下不斷(duan)抄起、散落呈(cheng)(cheng)螺旋行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)式實現(xian)熱交換，物(wu)(wu)料(liao)(liao)移(yi)動至(zhi)內(nei)(nei)層(ceng)(ceng)的(de)另一端(duan)進(jin)(jin)(jin)入中(zhong)(zhong)(zhong)層(ceng)(ceng)，進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)逆流烘干(gan)(gan)(gan)(gan)，物(wu)(wu)料(liao)(liao)在(zai)(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)不斷(duan)地被反復(fu)揚進(jin)(jin)(jin)，呈(cheng)(cheng)進(jin)(jin)(jin)兩步退一步的(de)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)方式，物(wu)(wu)料(liao)(liao)在(zai)(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)既充(chong)(chong)分吸收(shou)內(nei)(nei)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)散發的(de)熱量，又吸收(shou)中(zhong)(zhong)(zhong)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)熱量，同時又延(yan)長了干(gan)(gan)(gan)(gan)燥(zao)時間，物(wu)(wu)料(liao)(liao)在(zai)(zai)此達(da)到(dao)干(gan)(gan)(gan)(gan)燥(zao)狀態。物(wu)(wu)料(liao)(liao)行(xing)(xing)(xing)(xing)至(zhi)中(zhong)(zhong)(zhong)層(ceng)(ceng)另一端(duan)而(er)落入外層(ceng)(ceng)，物(wu)(wu)料(liao)(liao)在(zai)(zai)外層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)內(nei)(nei)呈(cheng)(cheng)矩形多回路方式行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)，達(da)到(dao)干(gan)(gan)(gan)(gan)燥(zao)效(xiao)果的(de)物(wu)(wu)料(liao)(liao)在(zai)(zai)熱風作用下快速行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)排(pai)出(chu)滾(gun)(gun)筒(tong)(tong)，沒有達(da)到(dao)干(gan)(gan)(gan)(gan)燥(zao)效(xiao)果的(de)濕物(wu)(wu)料(liao)(liao)因自重而(er)不能快速行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)，物(wu)(wu)料(liao)(liao)在(zai)(zai)此矩形抄板內(nei)(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)充(chong)(chong)分干(gan)(gan)(gan)(gan)燥(zao)，由此達(da)到(dao)干(gan)(gan)(gan)(gan)燥(zao)效(xiao)果，完成(cheng)干(gan)(gan)(gan)(gan)燥(zao)過程(cheng)。

設備特點

該設備與其他(ta)干燥(zao)設備相比，生產(chan)(chan)能力大(da)(da)，可(ke)連(lian)續操(cao)作； 結構簡單，操(cao)作方便；故(gu)障少(shao)，維修費用(yong)低；適用(yong)范圍(wei)廣，流體阻(zu)力小(xiao)，可(ke)以用(yong)它干燥(zao)顆料(liao)狀物(wu)料(liao)，對于那些附著性大(da)(da)的物(wu)料(liao)也(ye)很有利；操(cao)作彈性大(da)(da)，生產(chan)(chan)上允許(xu)產(chan)(chan)品的流量有較大(da)(da)波(bo)動范圍(wei)，不(bu)會影響(xiang)產(chan)(chan)品的質量；清(qing)掃容易。