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(shao)煤(mei)的(de)發電廠將煤(mei)磨成100微(wei)米以(yi)下的(de)煤(mei)粉(fen),用預(yu)熱空氣(qi)噴(pen)入爐膛經燃燒(shao)形成懸浮狀態,產生混雜有大量不燃物的(de)高(gao)溫煙氣(qi),經集塵(chen)裝置捕集就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)化(hua)學組(zu)成與粘土質相似(si),主要成分為二(er)氧化(hua)硅(gui)、三(san)氧化(hua)二(er)鋁、三(san)氧化(hua)二(er)鐵、氧化(hua)鈣和未燃盡碳。
工作原理
濕粉煤(mei)灰由供料(liao)(liao)(liao)裝置進(jin)(jin)(jin)入(ru)(ru)三(san)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的內(nei)層(ceng),實現順(shun)流烘(hong)干(gan), 粉煤(mei)灰在(zai)內(nei)層(ceng)的抄板下不斷(duan)抄起、散落呈螺旋行(xing)(xing)(xing)進(jin)(jin)(jin)式(shi)實現熱(re)交換,物(wu)(wu)料(liao)(liao)(liao)移動至內(nei)層(ceng)的另一端進(jin)(jin)(jin)入(ru)(ru)中(zhong)層(ceng),進(jin)(jin)(jin)行(xing)(xing)(xing)逆流烘(hong)干(gan),物(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)不斷(duan)地被反復揚(yang)進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩(liang)步(bu)退一步(bu)的行(xing)(xing)(xing)進(jin)(jin)(jin)方(fang)式(shi),物(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)既充分(fen)吸收內(nei)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)散發(fa)的熱(re)量,又吸收中(zhong)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的熱(re)量,同時(shi)又延長了干(gan)燥(zao)時(shi)間,物(wu)(wu)料(liao)(liao)(liao)在(zai)此達到干(gan)燥(zao)狀(zhuang)態。物(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)至中(zhong)層(ceng)另一端而(er)落入(ru)(ru)外(wai)層(ceng),物(wu)(wu)料(liao)(liao)(liao)在(zai)外(wai)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)內(nei)呈矩形多回路方(fang)式(shi)行(xing)(xing)(xing)進(jin)(jin)(jin),達到干(gan)燥(zao)效果(guo)(guo)的物(wu)(wu)料(liao)(liao)(liao)在(zai)熱(re)風作用下快速(su)行(xing)(xing)(xing)進(jin)(jin)(jin)排出滾(gun)(gun)筒(tong)(tong)(tong),沒有達到干(gan)燥(zao)效果(guo)(guo)的濕物(wu)(wu)料(liao)(liao)(liao)因自重而(er)不能快速(su)行(xing)(xing)(xing)進(jin)(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)在(zai)此矩形抄板內(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)充分(fen)干(gan)燥(zao),由此達到干(gan)燥(zao)效果(guo)(guo),完成干(gan)燥(zao)過程。
設備(bei)特點
該(gai)設備(bei)與其(qi)他干(gan)燥設備(bei)相比(bi),生產能(neng)力(li)大,可(ke)連續操作; 結構簡單,操作方(fang)便;故障少,維修費(fei)用(yong)低;適用(yong)范圍(wei)廣,流體(ti)阻力(li)小,可(ke)以用(yong)它干(gan)燥顆料(liao)狀物料(liao),對(dui)于那些附著性(xing)大的物料(liao)也(ye)很有(you)利;操作彈性(xing)大,生產上允(yun)許產品(pin)的流量(liang)有(you)較(jiao)大波動范圍(wei),不會影響產品(pin)的質量(liang);清(qing)掃容易。