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)煤(mei)(mei)(mei)的(de)(de)發電(dian)廠(chang)將煤(mei)(mei)(mei)磨成100微米以下的(de)(de)煤(mei)(mei)(mei)粉,用(yong)預熱空氣噴入爐膛經燃燒(shao)形(xing)成懸浮狀(zhuang)態(tai),產生(sheng)混雜(za)有大(da)量(liang)不燃物的(de)(de)高溫煙氣,經集(ji)(ji)塵裝(zhuang)置(zhi)捕集(ji)(ji)就得(de)到了粉煤(mei)(mei)(mei)灰。粉煤(mei)(mei)(mei)灰的(de)(de)化(hua)(hua)學組(zu)成與粘土質相(xiang)似,主要成分為二氧(yang)化(hua)(hua)硅、三(san)氧(yang)化(hua)(hua)二鋁、三(san)氧(yang)化(hua)(hua)二鐵、氧(yang)化(hua)(hua)鈣和(he)未(wei)燃盡(jin)碳。
工作原理
濕粉(fen)煤灰(hui)由(you)供料(liao)(liao)裝置進(jin)(jin)入(ru)(ru)三層(ceng)(ceng)(ceng)滾(gun)(gun)筒的(de)(de)(de)內(nei)層(ceng)(ceng)(ceng),實現順流烘干(gan), 粉(fen)煤灰(hui)在(zai)(zai)(zai)內(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)抄板(ban)(ban)下(xia)不斷(duan)抄起(qi)、散落呈螺(luo)旋行(xing)(xing)(xing)(xing)進(jin)(jin)式(shi)(shi)實現熱(re)交(jiao)換,物(wu)料(liao)(liao)移(yi)動至內(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)另(ling)一(yi)端(duan)進(jin)(jin)入(ru)(ru)中層(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)(xing)逆流烘干(gan),物(wu)料(liao)(liao)在(zai)(zai)(zai)中層(ceng)(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin),呈進(jin)(jin)兩步(bu)(bu)退一(yi)步(bu)(bu)的(de)(de)(de)行(xing)(xing)(xing)(xing)進(jin)(jin)方(fang)式(shi)(shi),物(wu)料(liao)(liao)在(zai)(zai)(zai)中層(ceng)(ceng)(ceng)既充分吸(xi)收(shou)內(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)筒散發(fa)的(de)(de)(de)熱(re)量(liang),又(you)吸(xi)收(shou)中層(ceng)(ceng)(ceng)滾(gun)(gun)筒的(de)(de)(de)熱(re)量(liang),同(tong)時又(you)延長了干(gan)燥(zao)(zao)時間,物(wu)料(liao)(liao)在(zai)(zai)(zai)此達(da)到(dao)干(gan)燥(zao)(zao)狀態。物(wu)料(liao)(liao)行(xing)(xing)(xing)(xing)至中層(ceng)(ceng)(ceng)另(ling)一(yi)端(duan)而落入(ru)(ru)外層(ceng)(ceng)(ceng),物(wu)料(liao)(liao)在(zai)(zai)(zai)外層(ceng)(ceng)(ceng)滾(gun)(gun)筒內(nei)呈矩(ju)形多回路方(fang)式(shi)(shi)行(xing)(xing)(xing)(xing)進(jin)(jin),達(da)到(dao)干(gan)燥(zao)(zao)效果(guo)的(de)(de)(de)物(wu)料(liao)(liao)在(zai)(zai)(zai)熱(re)風作用下(xia)快(kuai)速行(xing)(xing)(xing)(xing)進(jin)(jin)排出滾(gun)(gun)筒,沒有(you)達(da)到(dao)干(gan)燥(zao)(zao)效果(guo)的(de)(de)(de)濕物(wu)料(liao)(liao)因自重而不能快(kuai)速行(xing)(xing)(xing)(xing)進(jin)(jin),物(wu)料(liao)(liao)在(zai)(zai)(zai)此矩(ju)形抄板(ban)(ban)內(nei)進(jin)(jin)行(xing)(xing)(xing)(xing)充分干(gan)燥(zao)(zao),由(you)此達(da)到(dao)干(gan)燥(zao)(zao)效果(guo),完(wan)成干(gan)燥(zao)(zao)過程。
設備特點
該設(she)備與其(qi)他干燥設(she)備相比,生(sheng)產(chan)能力大,可連續操(cao)作(zuo); 結構(gou)簡單,操(cao)作(zuo)方便;故障少,維修費(fei)用(yong)低(di);適用(yong)范(fan)圍廣,流體(ti)阻力小,可以用(yong)它干燥顆(ke)料(liao)狀物料(liao),對于那(nei)些附著性大的(de)物料(liao)也很(hen)有(you)利;操(cao)作(zuo)彈性大,生(sheng)產(chan)上(shang)允許產(chan)品的(de)流量有(you)較大波動范(fan)圍,不會影響產(chan)品的(de)質(zhi)量;清掃(sao)容(rong)易。