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)的發電廠將煤(mei)磨成(cheng)100微(wei)米以下(xia)的煤(mei)粉(fen),用預熱空氣(qi)噴入爐膛經燃燒形成(cheng)懸浮狀態,產生混雜有大量(liang)不燃物(wu)的高(gao)溫煙氣(qi),經集(ji)(ji)塵裝(zhuang)置捕集(ji)(ji)就(jiu)得到了粉(fen)煤(mei)灰(hui)(hui)。粉(fen)煤(mei)灰(hui)(hui)的化學組成(cheng)與粘土(tu)質相似,主要成(cheng)分為二(er)氧(yang)化硅(gui)、三氧(yang)化二(er)鋁(lv)、三氧(yang)化二(er)鐵、氧(yang)化鈣(gai)和未燃盡(jin)碳。
工作原理(li)
濕粉煤灰由(you)供料(liao)裝置進入(ru)(ru)三(san)層(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng),實(shi)現(xian)(xian)順流烘(hong)干(gan)(gan), 粉煤灰在內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)抄(chao)板下不斷抄(chao)起、散(san)落(luo)呈(cheng)螺旋行(xing)(xing)(xing)進式實(shi)現(xian)(xian)熱(re)交換,物(wu)(wu)料(liao)移(yi)動(dong)至內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)另一端進入(ru)(ru)中(zhong)層(ceng)(ceng)(ceng),進行(xing)(xing)(xing)逆流烘(hong)干(gan)(gan),物(wu)(wu)料(liao)在中(zhong)層(ceng)(ceng)(ceng)不斷地被反復揚進,呈(cheng)進兩步(bu)退一步(bu)的(de)(de)行(xing)(xing)(xing)進方式,物(wu)(wu)料(liao)在中(zhong)層(ceng)(ceng)(ceng)既充(chong)分(fen)吸收內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)筒散(san)發(fa)的(de)(de)熱(re)量(liang)(liang),又(you)吸收中(zhong)層(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)熱(re)量(liang)(liang),同(tong)時又(you)延長了干(gan)(gan)燥(zao)時間(jian),物(wu)(wu)料(liao)在此達(da)到干(gan)(gan)燥(zao)狀態。物(wu)(wu)料(liao)行(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)另一端而(er)落(luo)入(ru)(ru)外層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)在外層(ceng)(ceng)(ceng)滾(gun)筒內(nei)(nei)呈(cheng)矩形多回(hui)路方式行(xing)(xing)(xing)進,達(da)到干(gan)(gan)燥(zao)效(xiao)果的(de)(de)物(wu)(wu)料(liao)在熱(re)風作(zuo)用下快速行(xing)(xing)(xing)進排出(chu)滾(gun)筒,沒有達(da)到干(gan)(gan)燥(zao)效(xiao)果的(de)(de)濕物(wu)(wu)料(liao)因自重而(er)不能快速行(xing)(xing)(xing)進,物(wu)(wu)料(liao)在此矩形抄(chao)板內(nei)(nei)進行(xing)(xing)(xing)充(chong)分(fen)干(gan)(gan)燥(zao),由(you)此達(da)到干(gan)(gan)燥(zao)效(xiao)果,完成干(gan)(gan)燥(zao)過程。
設備特點(dian)
該設(she)備(bei)與其(qi)他干燥設(she)備(bei)相(xiang)比,生(sheng)產(chan)(chan)能力大(da),可連續(xu)操(cao)作; 結構簡單,操(cao)作方便;故障少(shao),維修(xiu)費用(yong)低;適用(yong)范圍廣,流(liu)體阻(zu)力小,可以(yi)用(yong)它干燥顆料(liao)(liao)(liao)狀物(wu)料(liao)(liao)(liao),對于那些附著性大(da)的物(wu)料(liao)(liao)(liao)也很有(you)利;操(cao)作彈性大(da),生(sheng)產(chan)(chan)上允許產(chan)(chan)品的流(liu)量(liang)有(you)較(jiao)大(da)波(bo)動范圍,不會影響產(chan)(chan)品的質量(liang);清掃容(rong)易。