煤粉灰(hui)烘(hong)干(gan)機是煤粉經高溫燃燒后形成的一種(zhong)似火山灰(hui)質(zhi)混合材料。

它是燃燒煤的發(fa)電(dian)廠將煤磨成100微(wei)米以下的煤粉，用(yong)預熱空氣噴入爐膛經燃燒形成懸浮狀態，產(chan)生(sheng)混雜有大量不燃物的高溫(wen)煙氣，經集(ji)塵裝置捕(bu)集(ji)就得到了(le)粉煤灰。粉煤灰的化(hua)(hua)學組成與粘(zhan)土(tu)質相似，主要成分為二(er)(er)氧化(hua)(hua)硅、三(san)氧化(hua)(hua)二(er)(er)鋁、三(san)氧化(hua)(hua)二(er)(er)鐵、氧化(hua)(hua)鈣和未燃盡(jin)碳。

工(gong)作原理

濕(shi)粉煤(mei)灰(hui)由供料(liao)(liao)(liao)裝置進(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),實現順流烘(hong)干(gan), 粉煤(mei)灰(hui)在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)板下不(bu)斷抄(chao)起(qi)、散落(luo)呈(cheng)(cheng)螺旋行(xing)(xing)(xing)進(jin)(jin)式(shi)(shi)實現熱交換(huan)，物(wu)料(liao)(liao)(liao)移動至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)另一端進(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)行(xing)(xing)(xing)逆流烘(hong)干(gan)，物(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地(di)被(bei)反復揚進(jin)(jin)，呈(cheng)(cheng)進(jin)(jin)兩步退一步的(de)(de)行(xing)(xing)(xing)進(jin)(jin)方式(shi)(shi)，物(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)既(ji)充(chong)(chong)分吸(xi)收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發的(de)(de)熱量，又(you)(you)吸(xi)收中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)熱量，同時又(you)(you)延長(chang)了干(gan)燥(zao)時間，物(wu)料(liao)(liao)(liao)在(zai)此達(da)到干(gan)燥(zao)狀(zhuang)態。物(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)另一端而(er)落(luo)入外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)，物(wu)料(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)(nei)呈(cheng)(cheng)矩(ju)形多回路方式(shi)(shi)行(xing)(xing)(xing)進(jin)(jin)，達(da)到干(gan)燥(zao)效(xiao)(xiao)果(guo)的(de)(de)物(wu)料(liao)(liao)(liao)在(zai)熱風(feng)作用下快速行(xing)(xing)(xing)進(jin)(jin)排出(chu)滾筒(tong)，沒有達(da)到干(gan)燥(zao)效(xiao)(xiao)果(guo)的(de)(de)濕(shi)物(wu)料(liao)(liao)(liao)因自(zi)重而(er)不(bu)能快速行(xing)(xing)(xing)進(jin)(jin)，物(wu)料(liao)(liao)(liao)在(zai)此矩(ju)形抄(chao)板內(nei)(nei)進(jin)(jin)行(xing)(xing)(xing)充(chong)(chong)分干(gan)燥(zao)，由此達(da)到干(gan)燥(zao)效(xiao)(xiao)果(guo)，完(wan)成干(gan)燥(zao)過程。

設備特點

該設(she)備與其(qi)他干(gan)燥(zao)設(she)備相比，生產(chan)能力(li)大(da)，可連續(xu)操(cao)作； 結構簡單，操(cao)作方(fang)便；故障少，維(wei)修費(fei)用低(di)；適用范圍(wei)廣，流體阻力(li)小，可以用它干(gan)燥(zao)顆料(liao)狀物料(liao)，對于那些附(fu)著性(xing)大(da)的(de)物料(liao)也(ye)很有(you)利；操(cao)作彈性(xing)大(da)，生產(chan)上允許產(chan)品的(de)流量有(you)較大(da)波動范圍(wei)，不(bu)會影(ying)響產(chan)品的(de)質量；清(qing)掃容易。