煤粉灰烘(hong)干機(ji)是(shi)煤粉經高溫燃燒后形成的一種(zhong)似火山灰質(zhi)混合材(cai)料。
它(ta)是(shi)燃(ran)(ran)燒(shao)煤(mei)(mei)的(de)發電廠(chang)將煤(mei)(mei)磨成(cheng)100微米(mi)以下的(de)煤(mei)(mei)粉,用預熱空氣噴入(ru)爐(lu)膛經(jing)燃(ran)(ran)燒(shao)形成(cheng)懸浮狀態,產生混雜有(you)大量不燃(ran)(ran)物的(de)高溫煙氣,經(jing)集塵裝(zhuang)置捕(bu)集就(jiu)得到了粉煤(mei)(mei)灰。粉煤(mei)(mei)灰的(de)化(hua)學組成(cheng)與粘土質相(xiang)似,主要成(cheng)分為二氧化(hua)硅、三氧化(hua)二鋁、三氧化(hua)二鐵、氧化(hua)鈣和(he)未燃(ran)(ran)盡(jin)碳。
工作原(yuan)理
濕(shi)(shi)粉煤灰由供料裝置進(jin)(jin)入三(san)層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)內層(ceng)(ceng),實(shi)現順(shun)流烘干(gan), 粉煤灰在(zai)內層(ceng)(ceng)的(de)(de)抄板下不(bu)斷抄起(qi)、散落(luo)呈(cheng)螺旋行(xing)(xing)(xing)進(jin)(jin)式(shi)實(shi)現熱交換,物(wu)(wu)料移動(dong)至內層(ceng)(ceng)的(de)(de)另一端進(jin)(jin)入中層(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan),物(wu)(wu)料在(zai)中層(ceng)(ceng)不(bu)斷地被(bei)反復揚進(jin)(jin),呈(cheng)進(jin)(jin)兩步退一步的(de)(de)行(xing)(xing)(xing)進(jin)(jin)方式(shi),物(wu)(wu)料在(zai)中層(ceng)(ceng)既充(chong)分吸(xi)收內層(ceng)(ceng)滾(gun)筒(tong)(tong)散發的(de)(de)熱量,又(you)(you)吸(xi)收中層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)熱量,同(tong)時(shi)又(you)(you)延(yan)長(chang)了干(gan)燥時(shi)間,物(wu)(wu)料在(zai)此(ci)達(da)到干(gan)燥狀態。物(wu)(wu)料行(xing)(xing)(xing)至中層(ceng)(ceng)另一端而落(luo)入外(wai)層(ceng)(ceng),物(wu)(wu)料在(zai)外(wai)層(ceng)(ceng)滾(gun)筒(tong)(tong)內呈(cheng)矩形(xing)多回(hui)路方式(shi)行(xing)(xing)(xing)進(jin)(jin),達(da)到干(gan)燥效果(guo)的(de)(de)物(wu)(wu)料在(zai)熱風作用下快速行(xing)(xing)(xing)進(jin)(jin)排出滾(gun)筒(tong)(tong),沒有達(da)到干(gan)燥效果(guo)的(de)(de)濕(shi)(shi)物(wu)(wu)料因(yin)自重而不(bu)能快速行(xing)(xing)(xing)進(jin)(jin),物(wu)(wu)料在(zai)此(ci)矩形(xing)抄板內進(jin)(jin)行(xing)(xing)(xing)充(chong)分干(gan)燥,由此(ci)達(da)到干(gan)燥效果(guo),完(wan)成干(gan)燥過(guo)程。
設備特(te)點
該(gai)設備(bei)(bei)與(yu)其他干(gan)燥設備(bei)(bei)相比,生產能(neng)力(li)大(da),可連續操(cao)作; 結構(gou)簡單,操(cao)作方便;故障(zhang)少,維修費用(yong)(yong)低(di);適用(yong)(yong)范圍廣,流體阻(zu)力(li)小,可以用(yong)(yong)它干(gan)燥顆(ke)料狀物料,對(dui)于那些附著性大(da)的(de)物料也很有(you)利;操(cao)作彈性大(da),生產上(shang)允許產品的(de)流量有(you)較大(da)波動范圍,不會(hui)影響產品的(de)質(zhi)量;清掃容(rong)易。