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)(shao)煤的發電廠(chang)將煤磨成(cheng)100微(wei)米以下的煤粉(fen)(fen),用預熱空氣噴(pen)入爐膛經燃燒(shao)(shao)形成(cheng)懸浮(fu)狀(zhuang)態(tai),產(chan)生混雜有大量不燃物的高溫(wen)煙氣,經集塵(chen)裝置捕集就(jiu)得(de)到了粉(fen)(fen)煤灰。粉(fen)(fen)煤灰的化學組(zu)成(cheng)與粘土質相似(si),主(zhu)要(yao)成(cheng)分為二(er)氧(yang)(yang)化硅(gui)、三氧(yang)(yang)化二(er)鋁、三氧(yang)(yang)化二(er)鐵、氧(yang)(yang)化鈣和未燃盡碳。
工作(zuo)原理
濕(shi)粉煤灰由供料(liao)(liao)裝置進(jin)(jin)(jin)入(ru)(ru)三層(ceng)滾筒(tong)(tong)的(de)(de)內(nei)層(ceng),實現順(shun)流烘干(gan)(gan)(gan), 粉煤灰在內(nei)層(ceng)的(de)(de)抄板下(xia)不(bu)斷(duan)抄起(qi)、散(san)(san)落呈螺旋行(xing)(xing)(xing)進(jin)(jin)(jin)式實現熱交換,物(wu)(wu)(wu)料(liao)(liao)移(yi)動至(zhi)內(nei)層(ceng)的(de)(de)另一端(duan)進(jin)(jin)(jin)入(ru)(ru)中(zhong)層(ceng),進(jin)(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan)(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)在中(zhong)層(ceng)不(bu)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(de)(de)行(xing)(xing)(xing)進(jin)(jin)(jin)方(fang)式,物(wu)(wu)(wu)料(liao)(liao)在中(zhong)層(ceng)既(ji)充(chong)分吸收內(nei)層(ceng)滾筒(tong)(tong)散(san)(san)發的(de)(de)熱量,又(you)吸收中(zhong)層(ceng)滾筒(tong)(tong)的(de)(de)熱量,同時又(you)延長了干(gan)(gan)(gan)燥時間,物(wu)(wu)(wu)料(liao)(liao)在此達到干(gan)(gan)(gan)燥狀態(tai)。物(wu)(wu)(wu)料(liao)(liao)行(xing)(xing)(xing)至(zhi)中(zhong)層(ceng)另一端(duan)而(er)落入(ru)(ru)外(wai)層(ceng),物(wu)(wu)(wu)料(liao)(liao)在外(wai)層(ceng)滾筒(tong)(tong)內(nei)呈矩形多回路方(fang)式行(xing)(xing)(xing)進(jin)(jin)(jin),達到干(gan)(gan)(gan)燥效果的(de)(de)物(wu)(wu)(wu)料(liao)(liao)在熱風作用(yong)下(xia)快(kuai)速行(xing)(xing)(xing)進(jin)(jin)(jin)排(pai)出滾筒(tong)(tong),沒有達到干(gan)(gan)(gan)燥效果的(de)(de)濕(shi)物(wu)(wu)(wu)料(liao)(liao)因自重而(er)不(bu)能(neng)快(kuai)速行(xing)(xing)(xing)進(jin)(jin)(jin),物(wu)(wu)(wu)料(liao)(liao)在此矩形抄板內(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)充(chong)分干(gan)(gan)(gan)燥,由此達到干(gan)(gan)(gan)燥效果,完成干(gan)(gan)(gan)燥過程。
設備特(te)點
該設(she)備與(yu)其他干燥(zao)設(she)備相(xiang)比,生產(chan)(chan)能力(li)大(da),可(ke)連續操作; 結構簡(jian)單,操作方便;故障少,維(wei)修費用低(di);適用范圍廣,流體阻(zu)力(li)小,可(ke)以用它干燥(zao)顆料狀物(wu)料,對于那些(xie)附(fu)著性大(da)的物(wu)料也很有(you)利;操作彈(dan)性大(da),生產(chan)(chan)上允許產(chan)(chan)品的流量有(you)較(jiao)大(da)波(bo)動范圍,不會影(ying)響產(chan)(chan)品的質(zhi)量;清(qing)掃容易。