煤(mei)粉灰烘干機是煤(mei)粉經高溫燃燒后(hou)形成的(de)一種似火山灰質(zhi)混合材料。
它(ta)是燃(ran)燒(shao)煤的(de)發電廠將煤磨成(cheng)100微米(mi)以下的(de)煤粉,用預熱空氣噴入爐(lu)膛(tang)經(jing)燃(ran)燒(shao)形(xing)成(cheng)懸浮(fu)狀態,產生混(hun)雜(za)有大量不燃(ran)物的(de)高溫煙氣,經(jing)集塵裝(zhuang)置捕(bu)集就得到了粉煤灰。粉煤灰的(de)化(hua)(hua)學組成(cheng)與(yu)粘土質相似,主要(yao)成(cheng)分為二(er)(er)氧化(hua)(hua)硅、三氧化(hua)(hua)二(er)(er)鋁、三氧化(hua)(hua)二(er)(er)鐵、氧化(hua)(hua)鈣和(he)未燃(ran)盡碳。
工作(zuo)原理(li)
濕粉(fen)煤(mei)灰(hui)由供料(liao)(liao)裝置進(jin)入三層(ceng)滾(gun)筒的(de)內層(ceng),實(shi)現順流烘干, 粉(fen)煤(mei)灰(hui)在(zai)(zai)(zai)內層(ceng)的(de)抄(chao)板下不(bu)斷(duan)(duan)抄(chao)起(qi)、散落(luo)(luo)呈螺旋(xuan)行(xing)(xing)(xing)(xing)(xing)進(jin)式實(shi)現熱(re)交換,物(wu)(wu)(wu)料(liao)(liao)移動至內層(ceng)的(de)另一端進(jin)入中(zhong)層(ceng),進(jin)行(xing)(xing)(xing)(xing)(xing)逆流烘干,物(wu)(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)中(zhong)層(ceng)不(bu)斷(duan)(duan)地(di)被反(fan)復揚進(jin),呈進(jin)兩步(bu)退(tui)一步(bu)的(de)行(xing)(xing)(xing)(xing)(xing)進(jin)方(fang)式,物(wu)(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)中(zhong)層(ceng)既(ji)充(chong)分吸(xi)收內層(ceng)滾(gun)筒散發的(de)熱(re)量(liang),又吸(xi)收中(zhong)層(ceng)滾(gun)筒的(de)熱(re)量(liang),同時(shi)(shi)又延長了(le)干燥(zao)(zao)時(shi)(shi)間,物(wu)(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)此達(da)到干燥(zao)(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)行(xing)(xing)(xing)(xing)(xing)至中(zhong)層(ceng)另一端而落(luo)(luo)入外層(ceng),物(wu)(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)外層(ceng)滾(gun)筒內呈矩形多回路方(fang)式行(xing)(xing)(xing)(xing)(xing)進(jin),達(da)到干燥(zao)(zao)效果(guo)的(de)物(wu)(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)熱(re)風作用(yong)下快速行(xing)(xing)(xing)(xing)(xing)進(jin)排(pai)出滾(gun)筒,沒有達(da)到干燥(zao)(zao)效果(guo)的(de)濕物(wu)(wu)(wu)料(liao)(liao)因(yin)自重而不(bu)能快速行(xing)(xing)(xing)(xing)(xing)進(jin),物(wu)(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)此矩形抄(chao)板內進(jin)行(xing)(xing)(xing)(xing)(xing)充(chong)分干燥(zao)(zao),由此達(da)到干燥(zao)(zao)效果(guo),完成干燥(zao)(zao)過(guo)程。
設備特點
該設備與(yu)其他(ta)干燥設備相(xiang)比,生產(chan)(chan)能(neng)力大(da),可(ke)(ke)連(lian)續(xu)操(cao)作(zuo)(zuo); 結構簡單,操(cao)作(zuo)(zuo)方(fang)便(bian);故障少(shao),維修費用低(di);適(shi)用范圍(wei)廣,流體阻力小(xiao),可(ke)(ke)以用它干燥顆料(liao)(liao)狀物(wu)(wu)料(liao)(liao),對于那些附著性大(da)的物(wu)(wu)料(liao)(liao)也很有(you)利;操(cao)作(zuo)(zuo)彈性大(da),生產(chan)(chan)上允許產(chan)(chan)品的流量有(you)較大(da)波動范圍(wei),不會影(ying)響產(chan)(chan)品的質(zhi)量;清掃容(rong)易。