煤粉(fen)灰烘干機是煤粉(fen)經高溫燃燒后形成的一種(zhong)似(si)火山灰質混合材料。
它是燃燒煤(mei)的(de)發電廠將煤(mei)磨成(cheng)100微米以(yi)下的(de)煤(mei)粉(fen),用(yong)預(yu)熱空氣噴入爐膛經(jing)燃燒形成(cheng)懸浮(fu)狀態,產(chan)生混雜有大(da)量不(bu)燃物的(de)高溫煙氣,經(jing)集塵裝置捕(bu)集就得(de)到了粉(fen)煤(mei)灰(hui)。粉(fen)煤(mei)灰(hui)的(de)化學組成(cheng)與粘土質(zhi)相似,主要成(cheng)分為二(er)氧(yang)化硅、三氧(yang)化二(er)鋁、三氧(yang)化二(er)鐵、氧(yang)化鈣(gai)和未(wei)燃盡碳。
工(gong)作原理(li)
濕(shi)粉煤灰(hui)由供料(liao)裝(zhuang)置進(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)內(nei)層(ceng)(ceng)(ceng)(ceng),實(shi)現順流烘干(gan), 粉煤灰(hui)在(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)抄板下不(bu)斷抄起、散落呈螺旋行(xing)進(jin)式(shi)實(shi)現熱(re)交(jiao)換,物(wu)(wu)(wu)(wu)料(liao)移動至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)另一端進(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)行(xing)逆(ni)流烘干(gan),物(wu)(wu)(wu)(wu)料(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反復揚進(jin),呈進(jin)兩(liang)步(bu)退一步(bu)的(de)行(xing)進(jin)方式(shi),物(wu)(wu)(wu)(wu)料(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充(chong)分吸收(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒散發的(de)熱(re)量,又吸收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)熱(re)量,同時又延長了干(gan)燥(zao)時間,物(wu)(wu)(wu)(wu)料(liao)在(zai)此達(da)到(dao)干(gan)燥(zao)狀態。物(wu)(wu)(wu)(wu)料(liao)行(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另一端而(er)落入(ru)外層(ceng)(ceng)(ceng)(ceng),物(wu)(wu)(wu)(wu)料(liao)在(zai)外層(ceng)(ceng)(ceng)(ceng)滾(gun)筒內(nei)呈矩形多回路方式(shi)行(xing)進(jin),達(da)到(dao)干(gan)燥(zao)效果(guo)(guo)的(de)物(wu)(wu)(wu)(wu)料(liao)在(zai)熱(re)風(feng)作用下快速行(xing)進(jin)排出滾(gun)筒,沒有(you)達(da)到(dao)干(gan)燥(zao)效果(guo)(guo)的(de)濕(shi)物(wu)(wu)(wu)(wu)料(liao)因自重而(er)不(bu)能快速行(xing)進(jin),物(wu)(wu)(wu)(wu)料(liao)在(zai)此矩形抄板內(nei)進(jin)行(xing)充(chong)分干(gan)燥(zao),由此達(da)到(dao)干(gan)燥(zao)效果(guo)(guo),完成干(gan)燥(zao)過程。
設備特點
該設備與其他干燥設備相比,生產能力(li)大(da),可(ke)連續(xu)操(cao)作; 結構簡單,操(cao)作方便(bian);故障少(shao),維修(xiu)費用低(di);適用范(fan)圍(wei)廣,流(liu)體阻力(li)小,可(ke)以用它干燥顆料(liao)狀物料(liao),對(dui)于(yu)那些附(fu)著性大(da)的物料(liao)也(ye)很(hen)有(you)利;操(cao)作彈性大(da),生產上允許(xu)產品(pin)的流(liu)量(liang)有(you)較大(da)波(bo)動范(fan)圍(wei),不會影響產品(pin)的質(zhi)量(liang);清掃容易。