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(de)發電廠將(jiang)煤磨(mo)成100微米以(yi)下的(de)煤粉(fen),用預(yu)熱空(kong)氣噴入(ru)爐膛經(jing)燃燒(shao)(shao)形(xing)成懸浮狀態,產生混雜有大量不燃物的(de)高溫煙氣,經(jing)集(ji)塵裝置捕集(ji)就(jiu)得到了粉(fen)煤灰(hui)。粉(fen)煤灰(hui)的(de)化學組(zu)成與粘土質相似,主要成分(fen)為二氧(yang)化硅、三氧(yang)化二鋁、三氧(yang)化二鐵、氧(yang)化鈣和未燃盡碳。
工作原理
濕粉(fen)煤(mei)灰由供料(liao)裝(zhuang)置進(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng),實(shi)現順流烘(hong)干(gan)(gan), 粉(fen)煤(mei)灰在(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)抄板下不(bu)斷(duan)抄起、散(san)落(luo)(luo)呈(cheng)(cheng)螺旋行進(jin)(jin)(jin)式(shi)實(shi)現熱(re)(re)交換,物(wu)(wu)料(liao)移(yi)動至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)另一(yi)端進(jin)(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)(jin)行逆流烘(hong)干(gan)(gan),物(wu)(wu)料(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷(duan)地被(bei)反復揚進(jin)(jin)(jin),呈(cheng)(cheng)進(jin)(jin)(jin)兩(liang)步退(tui)一(yi)步的(de)(de)(de)行進(jin)(jin)(jin)方(fang)式(shi),物(wu)(wu)料(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既(ji)充分吸收(shou)(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散(san)發的(de)(de)(de)熱(re)(re)量,又吸收(shou)(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)(de)熱(re)(re)量,同時(shi)又延(yan)長了(le)干(gan)(gan)燥(zao)時(shi)間(jian),物(wu)(wu)料(liao)在(zai)此達(da)(da)到干(gan)(gan)燥(zao)狀(zhuang)態(tai)。物(wu)(wu)料(liao)行至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端而(er)落(luo)(luo)入(ru)外(wai)層(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)(wu)料(liao)在(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)呈(cheng)(cheng)矩(ju)形多回(hui)路方(fang)式(shi)行進(jin)(jin)(jin),達(da)(da)到干(gan)(gan)燥(zao)效(xiao)果的(de)(de)(de)物(wu)(wu)料(liao)在(zai)熱(re)(re)風作用下快速行進(jin)(jin)(jin)排出(chu)滾(gun)筒(tong),沒有達(da)(da)到干(gan)(gan)燥(zao)效(xiao)果的(de)(de)(de)濕物(wu)(wu)料(liao)因(yin)自(zi)重(zhong)而(er)不(bu)能(neng)快速行進(jin)(jin)(jin),物(wu)(wu)料(liao)在(zai)此矩(ju)形抄板內(nei)進(jin)(jin)(jin)行充分干(gan)(gan)燥(zao),由此達(da)(da)到干(gan)(gan)燥(zao)效(xiao)果,完成干(gan)(gan)燥(zao)過程。
設(she)備特點
該(gai)設備與(yu)其他干燥設備相比,生(sheng)產(chan)(chan)能(neng)力(li)大(da)(da),可(ke)連續操作; 結構簡單,操作方便;故障少,維(wei)修費用低;適用范圍廣,流(liu)體阻(zu)力(li)小,可(ke)以用它干燥顆料狀(zhuang)物料,對于那些附著性大(da)(da)的物料也很有(you)利;操作彈性大(da)(da),生(sheng)產(chan)(chan)上(shang)允許產(chan)(chan)品的流(liu)量有(you)較大(da)(da)波(bo)動范圍,不(bu)會影(ying)響產(chan)(chan)品的質量;清掃(sao)容(rong)易。