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(de)發電廠(chang)將煤(mei)磨(mo)成(cheng)100微(wei)米以(yi)下的(de)煤(mei)粉(fen),用預熱空(kong)氣噴(pen)入爐(lu)膛經(jing)燃燒形成(cheng)懸浮狀態,產生混(hun)雜有(you)大量不燃物的(de)高溫煙氣,經(jing)集塵裝置捕集就得到了(le)粉(fen)煤(mei)灰(hui)。粉(fen)煤(mei)灰(hui)的(de)化(hua)(hua)學組成(cheng)與粘(zhan)土質相似,主要(yao)成(cheng)分為二(er)氧(yang)化(hua)(hua)硅、三氧(yang)化(hua)(hua)二(er)鋁、三氧(yang)化(hua)(hua)二(er)鐵、氧(yang)化(hua)(hua)鈣和未燃盡碳。
工作(zuo)原(yuan)理
濕粉煤灰由供(gong)料(liao)(liao)裝(zhuang)置進(jin)(jin)入(ru)三(san)層(ceng)(ceng)滾(gun)筒(tong)的內(nei)層(ceng)(ceng),實現(xian)順流烘(hong)干(gan), 粉煤灰在(zai)內(nei)層(ceng)(ceng)的抄板(ban)下不斷抄起、散落呈(cheng)螺旋行(xing)(xing)進(jin)(jin)式實現(xian)熱(re)(re)交換(huan),物(wu)(wu)料(liao)(liao)移動(dong)至內(nei)層(ceng)(ceng)的另一端進(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng),進(jin)(jin)行(xing)(xing)逆(ni)流烘(hong)干(gan),物(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)不斷地被(bei)反復揚進(jin)(jin),呈(cheng)進(jin)(jin)兩步退一步的行(xing)(xing)進(jin)(jin)方式,物(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)滾(gun)筒(tong)散發的熱(re)(re)量,又吸收中(zhong)(zhong)層(ceng)(ceng)滾(gun)筒(tong)的熱(re)(re)量,同時又延長了干(gan)燥(zao)(zao)(zao)(zao)(zao)時間,物(wu)(wu)料(liao)(liao)在(zai)此(ci)達到干(gan)燥(zao)(zao)(zao)(zao)(zao)狀態。物(wu)(wu)料(liao)(liao)行(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)另一端而落入(ru)外(wai)層(ceng)(ceng),物(wu)(wu)料(liao)(liao)在(zai)外(wai)層(ceng)(ceng)滾(gun)筒(tong)內(nei)呈(cheng)矩(ju)形多回路方式行(xing)(xing)進(jin)(jin),達到干(gan)燥(zao)(zao)(zao)(zao)(zao)效果(guo)的物(wu)(wu)料(liao)(liao)在(zai)熱(re)(re)風作(zuo)用下快速行(xing)(xing)進(jin)(jin)排出滾(gun)筒(tong),沒有達到干(gan)燥(zao)(zao)(zao)(zao)(zao)效果(guo)的濕物(wu)(wu)料(liao)(liao)因自(zi)重而不能(neng)快速行(xing)(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)在(zai)此(ci)矩(ju)形抄板(ban)內(nei)進(jin)(jin)行(xing)(xing)充分干(gan)燥(zao)(zao)(zao)(zao)(zao),由此(ci)達到干(gan)燥(zao)(zao)(zao)(zao)(zao)效果(guo),完成(cheng)干(gan)燥(zao)(zao)(zao)(zao)(zao)過程。
設備(bei)特點
該(gai)設備與其他干燥(zao)設備相比,生(sheng)產(chan)能(neng)力大,可連續操(cao)作; 結構(gou)簡單,操(cao)作方便;故障少,維修費(fei)用低;適用范圍廣,流體阻力小,可以用它干燥(zao)顆(ke)料狀物(wu)料,對于那些(xie)附著性(xing)大的(de)物(wu)料也很有(you)利;操(cao)作彈性(xing)大,生(sheng)產(chan)上允(yun)許產(chan)品(pin)的(de)流量(liang)有(you)較大波動(dong)范圍,不會影響產(chan)品(pin)的(de)質量(liang);清(qing)掃容(rong)易。