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(ran)燒煤(mei)的發電廠(chang)將煤(mei)磨成100微(wei)米以(yi)下的煤(mei)粉(fen),用預熱空氣噴(pen)入爐膛經燃(ran)燒形(xing)成懸浮狀態,產生(sheng)混雜有大量不燃(ran)物(wu)的高溫煙氣,經集塵裝置捕(bu)集就得到(dao)了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的化(hua)(hua)學組成與(yu)粘土質相(xiang)似,主要成分為二(er)氧(yang)化(hua)(hua)硅、三(san)氧(yang)化(hua)(hua)二(er)鋁、三(san)氧(yang)化(hua)(hua)二(er)鐵、氧(yang)化(hua)(hua)鈣和未燃(ran)盡(jin)碳。
工作(zuo)原理
濕粉煤灰(hui)(hui)由(you)供(gong)料(liao)(liao)裝置進(jin)(jin)入三層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)內(nei)層(ceng)(ceng),實現順流(liu)烘干(gan), 粉煤灰(hui)(hui)在(zai)(zai)內(nei)層(ceng)(ceng)的(de)(de)抄(chao)板下不(bu)(bu)斷抄(chao)起、散落呈螺(luo)旋(xuan)行(xing)(xing)(xing)進(jin)(jin)式(shi)實現熱(re)交換,物(wu)(wu)料(liao)(liao)移動至內(nei)層(ceng)(ceng)的(de)(de)另(ling)一端進(jin)(jin)入中層(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)逆(ni)流(liu)烘干(gan),物(wu)(wu)料(liao)(liao)在(zai)(zai)中層(ceng)(ceng)不(bu)(bu)斷地被反復揚進(jin)(jin),呈進(jin)(jin)兩步(bu)退一步(bu)的(de)(de)行(xing)(xing)(xing)進(jin)(jin)方式(shi),物(wu)(wu)料(liao)(liao)在(zai)(zai)中層(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)散發的(de)(de)熱(re)量,又吸收中層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)熱(re)量,同時又延長了干(gan)燥(zao)時間(jian),物(wu)(wu)料(liao)(liao)在(zai)(zai)此(ci)達到(dao)干(gan)燥(zao)狀態。物(wu)(wu)料(liao)(liao)行(xing)(xing)(xing)至中層(ceng)(ceng)另(ling)一端而(er)落入外(wai)層(ceng)(ceng),物(wu)(wu)料(liao)(liao)在(zai)(zai)外(wai)層(ceng)(ceng)滾(gun)筒(tong)(tong)內(nei)呈矩(ju)形多回路方式(shi)行(xing)(xing)(xing)進(jin)(jin),達到(dao)干(gan)燥(zao)效果的(de)(de)物(wu)(wu)料(liao)(liao)在(zai)(zai)熱(re)風作用下快速(su)行(xing)(xing)(xing)進(jin)(jin)排出滾(gun)筒(tong)(tong),沒有達到(dao)干(gan)燥(zao)效果的(de)(de)濕物(wu)(wu)料(liao)(liao)因自(zi)重而(er)不(bu)(bu)能快速(su)行(xing)(xing)(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)在(zai)(zai)此(ci)矩(ju)形抄(chao)板內(nei)進(jin)(jin)行(xing)(xing)(xing)充分干(gan)燥(zao),由(you)此(ci)達到(dao)干(gan)燥(zao)效果,完成干(gan)燥(zao)過程。
設備特點
該設(she)備(bei)與其他干燥設(she)備(bei)相(xiang)比,生產(chan)(chan)能力大,可(ke)(ke)連續操(cao)作(zuo); 結構簡單,操(cao)作(zuo)方便;故障少(shao),維修(xiu)費用(yong)低(di);適用(yong)范圍廣(guang),流體(ti)阻(zu)力小,可(ke)(ke)以用(yong)它干燥顆料狀物料,對于(yu)那些附著性大的物料也很有(you)利;操(cao)作(zuo)彈性大,生產(chan)(chan)上允許產(chan)(chan)品的流量有(you)較大波動范圍,不會影響產(chan)(chan)品的質量;清掃容易。