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)燃燒(shao)(shao)煤的(de)發電廠將煤磨成100微米以下的(de)煤粉(fen),用預熱空氣噴(pen)入爐膛經(jing)燃燒(shao)(shao)形成懸浮(fu)狀態,產(chan)生(sheng)混(hun)雜有大量不(bu)燃物的(de)高溫煙氣,經(jing)集(ji)塵(chen)裝置捕集(ji)就得到了粉(fen)煤灰。粉(fen)煤灰的(de)化(hua)學組成與粘土(tu)質相似,主要成分(fen)為二氧(yang)化(hua)硅、三氧(yang)化(hua)二鋁、三氧(yang)化(hua)二鐵(tie)、氧(yang)化(hua)鈣和未燃盡碳。
工作原理(li)
濕(shi)粉(fen)煤灰(hui)由(you)供料裝置進(jin)入(ru)三(san)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)內(nei)(nei)(nei)層(ceng)(ceng)(ceng),實(shi)(shi)現順流烘干(gan), 粉(fen)煤灰(hui)在(zai)內(nei)(nei)(nei)層(ceng)(ceng)(ceng)的(de)抄(chao)板(ban)下(xia)不斷抄(chao)起(qi)、散(san)(san)落(luo)呈螺旋行(xing)(xing)進(jin)式(shi)實(shi)(shi)現熱交換,物(wu)料移動至(zhi)內(nei)(nei)(nei)層(ceng)(ceng)(ceng)的(de)另一端進(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng),進(jin)行(xing)(xing)逆流烘干(gan),物(wu)料在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)不斷地(di)被反(fan)復(fu)揚進(jin),呈進(jin)兩步(bu)退一步(bu)的(de)行(xing)(xing)進(jin)方式(shi),物(wu)料在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)既充分(fen)吸(xi)收(shou)內(nei)(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)散(san)(san)發的(de)熱量(liang),又吸(xi)收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)熱量(liang),同時又延長了干(gan)燥(zao)時間(jian),物(wu)料在(zai)此達(da)到(dao)干(gan)燥(zao)狀態(tai)。物(wu)料行(xing)(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)另一端而(er)落(luo)入(ru)外(wai)層(ceng)(ceng)(ceng),物(wu)料在(zai)外(wai)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)(nei)(nei)呈矩(ju)形(xing)多回路方式(shi)行(xing)(xing)進(jin),達(da)到(dao)干(gan)燥(zao)效(xiao)果(guo)的(de)物(wu)料在(zai)熱風作用(yong)下(xia)快速(su)行(xing)(xing)進(jin)排(pai)出滾(gun)筒(tong)(tong)(tong),沒有達(da)到(dao)干(gan)燥(zao)效(xiao)果(guo)的(de)濕(shi)物(wu)料因自(zi)重(zhong)而(er)不能快速(su)行(xing)(xing)進(jin),物(wu)料在(zai)此矩(ju)形(xing)抄(chao)板(ban)內(nei)(nei)(nei)進(jin)行(xing)(xing)充分(fen)干(gan)燥(zao),由(you)此達(da)到(dao)干(gan)燥(zao)效(xiao)果(guo),完(wan)成干(gan)燥(zao)過程。
設備特點(dian)
該設備與其(qi)他干燥設備相(xiang)比,生(sheng)產(chan)能力大,可連續操作; 結構(gou)簡單,操作方便;故(gu)障(zhang)少,維修(xiu)費用低;適(shi)用范圍(wei)(wei)廣,流體阻(zu)力小,可以用它(ta)干燥顆料(liao)狀物料(liao),對于那些附(fu)著(zhu)性(xing)大的(de)物料(liao)也很有利;操作彈性(xing)大,生(sheng)產(chan)上允許產(chan)品(pin)(pin)的(de)流量有較大波動范圍(wei)(wei),不會影響產(chan)品(pin)(pin)的(de)質(zhi)量;清掃容(rong)易(yi)。