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(ran)燒(shao)(shao)煤的(de)發電廠將(jiang)煤磨成(cheng)100微米以下的(de)煤粉(fen),用預熱空(kong)氣噴入爐膛經(jing)燃(ran)燒(shao)(shao)形成(cheng)懸浮(fu)狀態,產(chan)生混雜有大量不燃(ran)物(wu)的(de)高(gao)溫(wen)煙氣,經(jing)集塵裝置捕集就(jiu)得到(dao)了(le)粉(fen)煤灰。粉(fen)煤灰的(de)化(hua)學(xue)組成(cheng)與粘土質相(xiang)似,主要成(cheng)分為二氧(yang)化(hua)硅(gui)、三(san)氧(yang)化(hua)二鋁、三(san)氧(yang)化(hua)二鐵、氧(yang)化(hua)鈣和未燃(ran)盡碳。
工作原理
濕(shi)粉(fen)煤(mei)灰由(you)(you)供料(liao)(liao)(liao)(liao)裝置進入三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)內(nei)層(ceng)(ceng)(ceng)(ceng),實現順流烘干(gan), 粉(fen)煤(mei)灰在(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)抄板下不斷抄起(qi)、散落呈螺旋行(xing)(xing)進式(shi)實現熱(re)交換(huan),物(wu)料(liao)(liao)(liao)(liao)移動(dong)至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)另(ling)一端進入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進行(xing)(xing)逆流烘干(gan),物(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不斷地被反(fan)復揚進,呈進兩(liang)步退一步的(de)行(xing)(xing)進方(fang)式(shi),物(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充(chong)分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發(fa)的(de)熱(re)量(liang),又吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)熱(re)量(liang),同(tong)時又延長了干(gan)燥(zao)(zao)時間,物(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)達(da)到(dao)干(gan)燥(zao)(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)行(xing)(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一端而(er)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)滾筒(tong)內(nei)呈矩形多回路方(fang)式(shi)行(xing)(xing)進,達(da)到(dao)干(gan)燥(zao)(zao)效果的(de)物(wu)料(liao)(liao)(liao)(liao)在(zai)熱(re)風作用下快速行(xing)(xing)進排(pai)出滾筒(tong),沒(mei)有達(da)到(dao)干(gan)燥(zao)(zao)效果的(de)濕(shi)物(wu)料(liao)(liao)(liao)(liao)因自(zi)重而(er)不能(neng)快速行(xing)(xing)進,物(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)矩形抄板內(nei)進行(xing)(xing)充(chong)分干(gan)燥(zao)(zao),由(you)(you)此(ci)達(da)到(dao)干(gan)燥(zao)(zao)效果,完(wan)成干(gan)燥(zao)(zao)過程。
設(she)備特點(dian)
該(gai)設(she)備(bei)與其他(ta)干燥設(she)備(bei)相比,生(sheng)(sheng)產能力(li)大,可(ke)連續操作; 結構簡單,操作方便;故(gu)障少(shao),維修(xiu)費用低;適用范圍廣,流體阻力(li)小,可(ke)以用它干燥顆料(liao)狀物料(liao),對(dui)于那(nei)些附(fu)著性(xing)大的物料(liao)也很(hen)有(you)利(li);操作彈(dan)性(xing)大,生(sheng)(sheng)產上允(yun)許產品的流量有(you)較大波動范圍,不(bu)會影(ying)響產品的質量;清掃容(rong)易。