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。
它是燃燒煤(mei)的發電廠將煤(mei)磨成(cheng)(cheng)100微(wei)米以下(xia)的煤(mei)粉(fen)(fen),用預熱空(kong)氣噴(pen)入(ru)爐膛經(jing)(jing)燃燒形成(cheng)(cheng)懸浮狀態,產生(sheng)混雜有大量不燃物的高溫煙氣,經(jing)(jing)集(ji)塵裝(zhuang)置捕集(ji)就得到了(le)粉(fen)(fen)煤(mei)灰(hui)(hui)。粉(fen)(fen)煤(mei)灰(hui)(hui)的化(hua)(hua)學組(zu)成(cheng)(cheng)與粘土(tu)質相似,主要成(cheng)(cheng)分(fen)為二氧化(hua)(hua)硅、三氧化(hua)(hua)二鋁、三氧化(hua)(hua)二鐵、氧化(hua)(hua)鈣(gai)和未燃盡碳。
工作原理
濕(shi)(shi)粉(fen)煤灰由供料(liao)(liao)(liao)(liao)裝(zhuang)置進(jin)(jin)入三(san)層(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)內(nei)層(ceng),實現順流烘(hong)干(gan), 粉(fen)煤灰在(zai)內(nei)層(ceng)的(de)抄(chao)板下不斷抄(chao)起(qi)、散落(luo)(luo)呈(cheng)螺旋行(xing)進(jin)(jin)式實現熱(re)交(jiao)換,物料(liao)(liao)(liao)(liao)移動至內(nei)層(ceng)的(de)另(ling)一端(duan)進(jin)(jin)入中(zhong)層(ceng),進(jin)(jin)行(xing)逆流烘(hong)干(gan),物料(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)不斷地(di)被反(fan)復揚進(jin)(jin),呈(cheng)進(jin)(jin)兩步退一步的(de)行(xing)進(jin)(jin)方式,物料(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)既充分吸收內(nei)層(ceng)滾(gun)筒(tong)(tong)(tong)(tong)散發的(de)熱(re)量(liang),又(you)吸收中(zhong)層(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)熱(re)量(liang),同時(shi)又(you)延(yan)長了干(gan)燥時(shi)間,物料(liao)(liao)(liao)(liao)在(zai)此(ci)達(da)到(dao)干(gan)燥狀(zhuang)態。物料(liao)(liao)(liao)(liao)行(xing)至中(zhong)層(ceng)另(ling)一端(duan)而落(luo)(luo)入外層(ceng),物料(liao)(liao)(liao)(liao)在(zai)外層(ceng)滾(gun)筒(tong)(tong)(tong)(tong)內(nei)呈(cheng)矩形多回路方式行(xing)進(jin)(jin),達(da)到(dao)干(gan)燥效果的(de)物料(liao)(liao)(liao)(liao)在(zai)熱(re)風作用下快速(su)行(xing)進(jin)(jin)排出滾(gun)筒(tong)(tong)(tong)(tong),沒有達(da)到(dao)干(gan)燥效果的(de)濕(shi)(shi)物料(liao)(liao)(liao)(liao)因自重而不能快速(su)行(xing)進(jin)(jin),物料(liao)(liao)(liao)(liao)在(zai)此(ci)矩形抄(chao)板內(nei)進(jin)(jin)行(xing)充分干(gan)燥,由此(ci)達(da)到(dao)干(gan)燥效果,完(wan)成干(gan)燥過程。
設備特點
該設(she)備與(yu)其(qi)他干燥設(she)備相比,生產(chan)能(neng)力(li)大,可(ke)連續操(cao)作; 結構簡(jian)單,操(cao)作方(fang)便;故(gu)障少,維(wei)修費用低;適用范圍(wei)廣,流體阻(zu)力(li)小,可(ke)以用它干燥顆料狀物(wu)料,對于那些(xie)附著(zhu)性大的(de)物(wu)料也很有(you)利;操(cao)作彈性大,生產(chan)上允許產(chan)品的(de)流量有(you)較大波(bo)動(dong)范圍(wei),不會影(ying)響產(chan)品的(de)質量;清掃容易。