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。
它是燃燒煤的(de)發(fa)電廠將(jiang)煤磨成(cheng)100微米以(yi)下(xia)的(de)煤粉,用(yong)預熱空氣(qi)噴入爐膛經(jing)燃燒形成(cheng)懸浮狀態,產生混雜有大(da)量不燃物的(de)高溫煙(yan)氣(qi),經(jing)集塵裝置捕集就(jiu)得(de)到(dao)了(le)粉煤灰。粉煤灰的(de)化學組成(cheng)與粘土質相似,主(zhu)要成(cheng)分為二氧(yang)化硅、三氧(yang)化二鋁、三氧(yang)化二鐵、氧(yang)化鈣和(he)未燃盡碳(tan)。
工作原理
濕粉(fen)煤灰(hui)由供料(liao)裝置進(jin)入三層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的內(nei)層(ceng)(ceng)(ceng),實(shi)現順流(liu)烘干(gan)(gan)(gan), 粉(fen)煤灰(hui)在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)的抄板(ban)(ban)下(xia)不(bu)斷抄起、散落(luo)呈(cheng)螺旋行(xing)(xing)進(jin)式(shi)實(shi)現熱(re)(re)交換(huan),物(wu)(wu)料(liao)移動(dong)至內(nei)層(ceng)(ceng)(ceng)的另(ling)一端(duan)進(jin)入中(zhong)層(ceng)(ceng)(ceng),進(jin)行(xing)(xing)逆流(liu)烘干(gan)(gan)(gan),物(wu)(wu)料(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)不(bu)斷地被反復揚進(jin),呈(cheng)進(jin)兩步退一步的行(xing)(xing)進(jin)方式(shi),物(wu)(wu)料(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)既充分吸(xi)收內(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)散發的熱(re)(re)量(liang)(liang),又(you)吸(xi)收中(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的熱(re)(re)量(liang)(liang),同時(shi)又(you)延長了干(gan)(gan)(gan)燥時(shi)間,物(wu)(wu)料(liao)在(zai)(zai)此(ci)達到干(gan)(gan)(gan)燥狀態。物(wu)(wu)料(liao)行(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)另(ling)一端(duan)而(er)落(luo)入外層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)內(nei)呈(cheng)矩形多(duo)回(hui)路方式(shi)行(xing)(xing)進(jin),達到干(gan)(gan)(gan)燥效(xiao)果(guo)的物(wu)(wu)料(liao)在(zai)(zai)熱(re)(re)風(feng)作用下(xia)快(kuai)(kuai)速(su)行(xing)(xing)進(jin)排出(chu)滾(gun)(gun)筒(tong)(tong)(tong),沒有(you)達到干(gan)(gan)(gan)燥效(xiao)果(guo)的濕物(wu)(wu)料(liao)因(yin)自重(zhong)而(er)不(bu)能快(kuai)(kuai)速(su)行(xing)(xing)進(jin),物(wu)(wu)料(liao)在(zai)(zai)此(ci)矩形抄板(ban)(ban)內(nei)進(jin)行(xing)(xing)充分干(gan)(gan)(gan)燥,由此(ci)達到干(gan)(gan)(gan)燥效(xiao)果(guo),完成(cheng)干(gan)(gan)(gan)燥過程。
設(she)備特點
該設(she)備與其他干(gan)燥設(she)備相比,生產能(neng)力(li)(li)大,可連續(xu)操作(zuo); 結(jie)構簡單(dan),操作(zuo)方便;故障少,維修費(fei)用(yong)低;適(shi)用(yong)范圍廣(guang),流(liu)體阻(zu)力(li)(li)小,可以用(yong)它(ta)干(gan)燥顆料(liao)狀物(wu)料(liao),對(dui)于(yu)那(nei)些(xie)附著性大的物(wu)料(liao)也很有利;操作(zuo)彈性大,生產上允許產品的流(liu)量有較大波動范圍,不會影(ying)響產品的質量;清掃容易。