煤粉灰烘干機(ji)是(shi)煤粉經高溫燃燒(shao)后形成的一種(zhong)似火山灰質混合材(cai)料(liao)。

它(ta)是燃燒煤(mei)的(de)發電廠將煤(mei)磨成100微(wei)米(mi)以下的(de)煤(mei)粉，用預熱(re)空氣噴入爐膛(tang)經燃燒形(xing)成懸浮狀(zhuang)態，產生混雜有(you)大量不(bu)燃物(wu)的(de)高溫煙氣，經集(ji)塵(chen)裝置捕集(ji)就得(de)到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)學組(zu)成與粘土質相似，主要成分為二氧(yang)(yang)(yang)化(hua)硅、三氧(yang)(yang)(yang)化(hua)二鋁、三氧(yang)(yang)(yang)化(hua)二鐵(tie)、氧(yang)(yang)(yang)化(hua)鈣和未燃盡碳。

工作(zuo)原理

濕粉煤灰由(you)供料(liao)(liao)(liao)(liao)(liao)裝置進(jin)(jin)入三層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)內(nei)(nei)層(ceng)(ceng),實(shi)(shi)現順流烘干(gan)(gan)(gan), 粉煤灰在內(nei)(nei)層(ceng)(ceng)的(de)抄(chao)板(ban)下(xia)不斷抄(chao)起(qi)、散落(luo)呈(cheng)螺旋(xuan)行(xing)(xing)(xing)進(jin)(jin)式實(shi)(shi)現熱交換(huan)，物料(liao)(liao)(liao)(liao)(liao)移(yi)動至(zhi)內(nei)(nei)層(ceng)(ceng)的(de)另(ling)一(yi)(yi)端(duan)進(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)，進(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan)(gan)(gan)，物料(liao)(liao)(liao)(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)不斷地被反復揚進(jin)(jin)，呈(cheng)進(jin)(jin)兩步退一(yi)(yi)步的(de)行(xing)(xing)(xing)進(jin)(jin)方式，物料(liao)(liao)(liao)(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)既充(chong)(chong)分吸收內(nei)(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)散發(fa)的(de)熱量，又(you)吸收中(zhong)(zhong)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)熱量，同時又(you)延長了干(gan)(gan)(gan)燥時間，物料(liao)(liao)(liao)(liao)(liao)在此(ci)達到(dao)干(gan)(gan)(gan)燥狀態。物料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)另(ling)一(yi)(yi)端(duan)而落(luo)入外(wai)層(ceng)(ceng)，物料(liao)(liao)(liao)(liao)(liao)在外(wai)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)內(nei)(nei)呈(cheng)矩形多回路方式行(xing)(xing)(xing)進(jin)(jin)，達到(dao)干(gan)(gan)(gan)燥效果的(de)物料(liao)(liao)(liao)(liao)(liao)在熱風作(zuo)用下(xia)快(kuai)速(su)行(xing)(xing)(xing)進(jin)(jin)排(pai)出滾(gun)筒(tong)(tong)(tong)(tong)，沒(mei)有(you)達到(dao)干(gan)(gan)(gan)燥效果的(de)濕物料(liao)(liao)(liao)(liao)(liao)因自重(zhong)而不能快(kuai)速(su)行(xing)(xing)(xing)進(jin)(jin)，物料(liao)(liao)(liao)(liao)(liao)在此(ci)矩形抄(chao)板(ban)內(nei)(nei)進(jin)(jin)行(xing)(xing)(xing)充(chong)(chong)分干(gan)(gan)(gan)燥，由(you)此(ci)達到(dao)干(gan)(gan)(gan)燥效果，完(wan)成干(gan)(gan)(gan)燥過(guo)程(cheng)。

設備特點(dian)

該(gai)設(she)備與其他干燥設(she)備相比，生產(chan)(chan)能力大，可連續操作(zuo)； 結構(gou)簡單，操作(zuo)方便；故(gu)障少，維修費用(yong)低；適(shi)用(yong)范圍廣，流(liu)體阻力小，可以(yi)用(yong)它干燥顆料狀物(wu)料，對(dui)于那些(xie)附著性(xing)(xing)大的(de)物(wu)料也很有(you)利(li)；操作(zuo)彈性(xing)(xing)大，生產(chan)(chan)上允許產(chan)(chan)品的(de)流(liu)量(liang)有(you)較大波動(dong)范圍，不會影響產(chan)(chan)品的(de)質量(liang)；清掃容易。