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(ta)是燃燒煤的(de)發(fa)電廠將煤磨成100微米以下(xia)的(de)煤粉,用(yong)預熱空氣噴入爐膛(tang)經燃燒形成懸浮狀(zhuang)態,產(chan)生(sheng)混雜有(you)大量不燃物的(de)高溫煙(yan)氣,經集塵裝(zhuang)置捕(bu)集就得到了粉煤灰。粉煤灰的(de)化(hua)學組(zu)成與(yu)粘(zhan)土質相似,主要成分為二氧(yang)化(hua)硅、三氧(yang)化(hua)二鋁、三氧(yang)化(hua)二鐵、氧(yang)化(hua)鈣和未(wei)燃盡(jin)碳(tan)。
工(gong)作原理
濕(shi)粉煤灰(hui)由(you)供料(liao)(liao)(liao)(liao)裝置進(jin)(jin)入三(san)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的內(nei)(nei)層(ceng)(ceng)(ceng)(ceng),實(shi)現(xian)順流烘干, 粉煤灰(hui)在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的抄(chao)板下(xia)(xia)不(bu)斷抄(chao)起、散落呈(cheng)螺(luo)旋行(xing)進(jin)(jin)式(shi)實(shi)現(xian)熱交換,物(wu)料(liao)(liao)(liao)(liao)移動至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的另一(yi)端(duan)(duan)進(jin)(jin)入中層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)逆流烘干,物(wu)料(liao)(liao)(liao)(liao)在(zai)中層(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反復揚進(jin)(jin),呈(cheng)進(jin)(jin)兩步(bu)退一(yi)步(bu)的行(xing)進(jin)(jin)方式(shi),物(wu)料(liao)(liao)(liao)(liao)在(zai)中層(ceng)(ceng)(ceng)(ceng)既充(chong)分(fen)吸(xi)收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散發的熱量,又(you)吸(xi)收中層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的熱量,同時(shi)又(you)延長了干燥(zao)(zao)時(shi)間,物(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)(ci)達到干燥(zao)(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)行(xing)至中層(ceng)(ceng)(ceng)(ceng)另一(yi)端(duan)(duan)而落入外(wai)層(ceng)(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)在(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)(nei)呈(cheng)矩(ju)形多回(hui)路(lu)方式(shi)行(xing)進(jin)(jin),達到干燥(zao)(zao)效(xiao)(xiao)果的物(wu)料(liao)(liao)(liao)(liao)在(zai)熱風(feng)作用下(xia)(xia)快速行(xing)進(jin)(jin)排(pai)出(chu)滾(gun)筒(tong),沒有(you)達到干燥(zao)(zao)效(xiao)(xiao)果的濕(shi)物(wu)料(liao)(liao)(liao)(liao)因自重而不(bu)能快速行(xing)進(jin)(jin),物(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)(ci)矩(ju)形抄(chao)板內(nei)(nei)進(jin)(jin)行(xing)充(chong)分(fen)干燥(zao)(zao),由(you)此(ci)(ci)達到干燥(zao)(zao)效(xiao)(xiao)果,完(wan)成干燥(zao)(zao)過程。
設備特(te)點(dian)
該設(she)(she)備與其(qi)他干燥設(she)(she)備相(xiang)比,生(sheng)產能力(li)大(da),可連續操(cao)作; 結構簡單,操(cao)作方便(bian);故(gu)障少,維(wei)修費用(yong)低;適用(yong)范圍廣,流體(ti)阻力(li)小,可以用(yong)它(ta)干燥顆料(liao)狀物料(liao),對(dui)于(yu)那些附(fu)著性大(da)的物料(liao)也很有利;操(cao)作彈(dan)性大(da),生(sheng)產上允許產品(pin)的流量有較大(da)波動范圍,不會影(ying)響產品(pin)的質(zhi)量;清(qing)掃(sao)容易。