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)燃燒煤(mei)(mei)的發電廠(chang)將煤(mei)(mei)磨成(cheng)100微米以(yi)下的煤(mei)(mei)粉,用預(yu)熱空氣噴入爐膛經燃燒形(xing)成(cheng)懸浮狀態,產生混雜有(you)大量不燃物的高溫煙氣,經集塵裝置(zhi)捕集就得(de)到了(le)粉煤(mei)(mei)灰。粉煤(mei)(mei)灰的化(hua)學組成(cheng)與(yu)粘土質相似,主要成(cheng)分(fen)為二(er)氧(yang)化(hua)硅、三氧(yang)化(hua)二(er)鋁、三氧(yang)化(hua)二(er)鐵、氧(yang)化(hua)鈣和未燃盡碳。
工作(zuo)原理
濕(shi)粉煤(mei)灰由(you)供料(liao)(liao)(liao)(liao)(liao)裝置進入(ru)三層(ceng)滾(gun)筒(tong)(tong)的(de)內層(ceng),實現(xian)(xian)順(shun)流烘干(gan), 粉煤(mei)灰在(zai)(zai)(zai)內層(ceng)的(de)抄板(ban)下(xia)不斷抄起、散落(luo)呈(cheng)螺旋行(xing)(xing)進式(shi)實現(xian)(xian)熱(re)交(jiao)換,物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)移動至內層(ceng)的(de)另一端(duan)進入(ru)中(zhong)層(ceng),進行(xing)(xing)逆流烘干(gan),物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)層(ceng)不斷地被反復揚進,呈(cheng)進兩步(bu)退一步(bu)的(de)行(xing)(xing)進方式(shi),物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)層(ceng)既充分吸(xi)收內層(ceng)滾(gun)筒(tong)(tong)散發(fa)的(de)熱(re)量,又(you)吸(xi)收中(zhong)層(ceng)滾(gun)筒(tong)(tong)的(de)熱(re)量,同(tong)時(shi)又(you)延長了干(gan)燥(zao)(zao)(zao)(zao)(zao)時(shi)間,物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)此(ci)達到(dao)干(gan)燥(zao)(zao)(zao)(zao)(zao)狀態(tai)。物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)至中(zhong)層(ceng)另一端(duan)而落(luo)入(ru)外(wai)層(ceng),物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)外(wai)層(ceng)滾(gun)筒(tong)(tong)內呈(cheng)矩形(xing)多回(hui)路方式(shi)行(xing)(xing)進,達到(dao)干(gan)燥(zao)(zao)(zao)(zao)(zao)效果(guo)的(de)物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)熱(re)風作用(yong)下(xia)快速(su)行(xing)(xing)進排出滾(gun)筒(tong)(tong),沒(mei)有達到(dao)干(gan)燥(zao)(zao)(zao)(zao)(zao)效果(guo)的(de)濕(shi)物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)因自重而不能(neng)快速(su)行(xing)(xing)進,物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)(zai)此(ci)矩形(xing)抄板(ban)內進行(xing)(xing)充分干(gan)燥(zao)(zao)(zao)(zao)(zao),由(you)此(ci)達到(dao)干(gan)燥(zao)(zao)(zao)(zao)(zao)效果(guo),完成(cheng)干(gan)燥(zao)(zao)(zao)(zao)(zao)過程。
設(she)備特點
該設(she)備與其他干燥(zao)設(she)備相比,生產能(neng)力(li)大(da),可連(lian)續操(cao)作; 結(jie)構簡(jian)單(dan),操(cao)作方(fang)便;故障少(shao),維修費用(yong)(yong)低;適用(yong)(yong)范(fan)圍(wei)廣,流體(ti)阻(zu)力(li)小,可以用(yong)(yong)它干燥(zao)顆(ke)料狀(zhuang)物料,對于那(nei)些附著性大(da)的物料也很有利;操(cao)作彈性大(da),生產上允許(xu)產品的流量有較大(da)波動范(fan)圍(wei),不(bu)會影響產品的質量;清(qing)掃容易。