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。
它是燃燒煤(mei)(mei)的(de)發(fa)電廠將煤(mei)(mei)磨成100微米以(yi)下的(de)煤(mei)(mei)粉(fen),用預熱空氣噴入爐膛經(jing)燃燒形成懸浮狀態,產生(sheng)混雜(za)有大量不燃物的(de)高溫煙氣,經(jing)集塵裝置捕集就得到(dao)了粉(fen)煤(mei)(mei)灰。粉(fen)煤(mei)(mei)灰的(de)化學組成與粘土(tu)質相似(si),主(zhu)要成分為二氧化硅、三(san)氧化二鋁、三(san)氧化二鐵、氧化鈣和未(wei)燃盡碳。
工作原(yuan)理(li)
濕粉(fen)煤灰(hui)由供料(liao)裝置進(jin)(jin)(jin)(jin)入(ru)三(san)層(ceng)(ceng)滾筒(tong)(tong)(tong)的內(nei)(nei)層(ceng)(ceng),實現順(shun)流烘干(gan), 粉(fen)煤灰(hui)在內(nei)(nei)層(ceng)(ceng)的抄(chao)(chao)板(ban)下不(bu)斷抄(chao)(chao)起、散落呈(cheng)螺(luo)旋(xuan)行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)式實現熱(re)交換(huan),物(wu)(wu)料(liao)移動至(zhi)(zhi)內(nei)(nei)層(ceng)(ceng)的另一(yi)端進(jin)(jin)(jin)(jin)入(ru)中層(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan),物(wu)(wu)料(liao)在中層(ceng)(ceng)不(bu)斷地被反復(fu)揚進(jin)(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)(jin)兩步退一(yi)步的行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)方式,物(wu)(wu)料(liao)在中層(ceng)(ceng)既充(chong)分(fen)吸收內(nei)(nei)層(ceng)(ceng)滾筒(tong)(tong)(tong)散發的熱(re)量,又吸收中層(ceng)(ceng)滾筒(tong)(tong)(tong)的熱(re)量,同時又延(yan)長了干(gan)燥(zao)時間,物(wu)(wu)料(liao)在此達(da)(da)(da)到干(gan)燥(zao)狀態。物(wu)(wu)料(liao)行(xing)(xing)(xing)至(zhi)(zhi)中層(ceng)(ceng)另一(yi)端而(er)落入(ru)外(wai)(wai)層(ceng)(ceng),物(wu)(wu)料(liao)在外(wai)(wai)層(ceng)(ceng)滾筒(tong)(tong)(tong)內(nei)(nei)呈(cheng)矩形多回路方式行(xing)(xing)(xing)進(jin)(jin)(jin)(jin),達(da)(da)(da)到干(gan)燥(zao)效(xiao)果(guo)的物(wu)(wu)料(liao)在熱(re)風作用下快速行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)排(pai)出滾筒(tong)(tong)(tong),沒有達(da)(da)(da)到干(gan)燥(zao)效(xiao)果(guo)的濕物(wu)(wu)料(liao)因自(zi)重而(er)不(bu)能快速行(xing)(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)料(liao)在此矩形抄(chao)(chao)板(ban)內(nei)(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)充(chong)分(fen)干(gan)燥(zao),由此達(da)(da)(da)到干(gan)燥(zao)效(xiao)果(guo),完成干(gan)燥(zao)過程。
設(she)備特點
該設備與其他干(gan)燥設備相(xiang)比,生產(chan)能力大,可連續操作(zuo); 結(jie)構簡單,操作(zuo)方便;故障少,維修費用(yong)(yong)低;適用(yong)(yong)范圍廣,流體阻力小,可以用(yong)(yong)它(ta)干(gan)燥顆料(liao)狀物料(liao),對于那些附著性大的(de)(de)物料(liao)也很有利;操作(zuo)彈性大,生產(chan)上允許產(chan)品的(de)(de)流量(liang)有較大波動(dong)范圍,不(bu)會影響(xiang)產(chan)品的(de)(de)質量(liang);清掃容易。