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(shi)燃(ran)燒煤的(de)發電廠將煤磨成100微米以下(xia)的(de)煤粉,用預(yu)熱空(kong)氣噴入爐膛經燃(ran)燒形成懸浮(fu)狀態,產(chan)生混雜有(you)大量不燃(ran)物的(de)高溫煙氣,經集塵(chen)裝置捕集就得到了(le)粉煤灰。粉煤灰的(de)化學組成與粘土質相似,主要(yao)成分為二(er)(er)氧(yang)化硅、三氧(yang)化二(er)(er)鋁、三氧(yang)化二(er)(er)鐵、氧(yang)化鈣和(he)未燃(ran)盡碳。
工作原(yuan)理(li)
濕粉(fen)(fen)煤灰(hui)由供料(liao)(liao)(liao)裝置進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的(de)(de)(de)內(nei)層(ceng)(ceng)(ceng),實(shi)現順流(liu)烘干(gan)(gan)(gan)(gan), 粉(fen)(fen)煤灰(hui)在(zai)(zai)(zai)內(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)抄(chao)板下不(bu)斷抄(chao)起、散(san)落(luo)(luo)呈(cheng)(cheng)螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)式(shi)實(shi)現熱(re)交換,物(wu)(wu)(wu)料(liao)(liao)(liao)移(yi)動至內(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)另一端(duan)進(jin)(jin)(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)逆(ni)流(liu)烘干(gan)(gan)(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)不(bu)斷地被反(fan)復揚進(jin)(jin)(jin)(jin),呈(cheng)(cheng)進(jin)(jin)(jin)(jin)兩步退一步的(de)(de)(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方式(shi),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)散(san)發(fa)的(de)(de)(de)熱(re)量,又(you)吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的(de)(de)(de)熱(re)量,同(tong)時(shi)又(you)延長了干(gan)(gan)(gan)(gan)燥時(shi)間,物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)此(ci)達(da)到干(gan)(gan)(gan)(gan)燥狀態。物(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)另一端(duan)而落(luo)(luo)入外層(ceng)(ceng)(ceng),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)外層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)內(nei)呈(cheng)(cheng)矩(ju)形(xing)多(duo)回路(lu)方式(shi)行(xing)(xing)進(jin)(jin)(jin)(jin),達(da)到干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo)的(de)(de)(de)物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)熱(re)風作(zuo)用下快速(su)(su)行(xing)(xing)進(jin)(jin)(jin)(jin)排(pai)出(chu)滾(gun)(gun)筒(tong)(tong)(tong),沒有達(da)到干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo)的(de)(de)(de)濕物(wu)(wu)(wu)料(liao)(liao)(liao)因自(zi)重而不(bu)能快速(su)(su)行(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)此(ci)矩(ju)形(xing)抄(chao)板內(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充分干(gan)(gan)(gan)(gan)燥,由此(ci)達(da)到干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo),完成干(gan)(gan)(gan)(gan)燥過(guo)程(cheng)。
設備特點
該設備與其(qi)他(ta)干(gan)燥(zao)設備相比,生(sheng)產能力大(da),可(ke)連續操作; 結構簡(jian)單,操作方(fang)便(bian);故障少,維修費(fei)用低;適(shi)用范圍廣,流(liu)體阻(zu)力小(xiao),可(ke)以用它干(gan)燥(zao)顆料(liao)狀物料(liao),對(dui)于那些附(fu)著性(xing)大(da)的物料(liao)也很有利;操作彈性(xing)大(da),生(sheng)產上允許產品的流(liu)量(liang)有較大(da)波動范圍,不會影響產品的質量(liang);清(qing)掃容易。