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(ta)是(shi)燃(ran)燒(shao)煤(mei)的(de)(de)發(fa)電廠將煤(mei)磨成100微米以下的(de)(de)煤(mei)粉(fen),用預熱空氣(qi)(qi)噴入(ru)爐(lu)膛經燃(ran)燒(shao)形(xing)成懸浮(fu)狀態(tai),產生(sheng)混雜(za)有大量不燃(ran)物的(de)(de)高溫煙氣(qi)(qi),經集(ji)塵裝(zhuang)置捕集(ji)就得(de)到了(le)粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)(de)化(hua)學組(zu)成與粘土質相似(si),主(zhu)要成分為二氧(yang)(yang)化(hua)硅、三氧(yang)(yang)化(hua)二鋁、三氧(yang)(yang)化(hua)二鐵(tie)、氧(yang)(yang)化(hua)鈣和未(wei)燃(ran)盡(jin)碳。
工作原(yuan)理
濕粉(fen)煤(mei)(mei)灰由供料(liao)(liao)(liao)裝置進(jin)(jin)(jin)入(ru)三(san)層(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒(tong)的內(nei)層(ceng)(ceng)(ceng),實現(xian)順(shun)流(liu)烘(hong)干, 粉(fen)煤(mei)(mei)灰在內(nei)層(ceng)(ceng)(ceng)的抄(chao)板(ban)下(xia)不(bu)(bu)斷(duan)抄(chao)起、散(san)落呈螺旋行(xing)進(jin)(jin)(jin)式(shi)實現(xian)熱(re)交(jiao)換,物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)移動至(zhi)內(nei)層(ceng)(ceng)(ceng)的另(ling)一(yi)端進(jin)(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)(jin)行(xing)逆流(liu)烘(hong)干,物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)不(bu)(bu)斷(duan)地被(bei)反復(fu)揚(yang)進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩步退一(yi)步的行(xing)進(jin)(jin)(jin)方式(shi),物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在中(zhong)層(ceng)(ceng)(ceng)既充(chong)分吸(xi)收內(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒(tong)散(san)發的熱(re)量(liang)(liang),又吸(xi)收中(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒(tong)的熱(re)量(liang)(liang),同時(shi)又延(yan)長了干燥(zao)時(shi)間,物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在此(ci)達到(dao)(dao)干燥(zao)狀(zhuang)態。物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)另(ling)一(yi)端而落入(ru)外層(ceng)(ceng)(ceng),物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在外層(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒(tong)內(nei)呈矩形(xing)多回路方式(shi)行(xing)進(jin)(jin)(jin),達到(dao)(dao)干燥(zao)效(xiao)果(guo)(guo)的物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在熱(re)風(feng)作用(yong)下(xia)快(kuai)速行(xing)進(jin)(jin)(jin)排出滾(gun)(gun)(gun)筒(tong),沒有達到(dao)(dao)干燥(zao)效(xiao)果(guo)(guo)的濕物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)因自(zi)重(zhong)而不(bu)(bu)能快(kuai)速行(xing)進(jin)(jin)(jin),物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在此(ci)矩形(xing)抄(chao)板(ban)內(nei)進(jin)(jin)(jin)行(xing)充(chong)分干燥(zao),由此(ci)達到(dao)(dao)干燥(zao)效(xiao)果(guo)(guo),完成干燥(zao)過程。
設(she)備特(te)點
該(gai)設備(bei)與(yu)其他干燥設備(bei)相比,生(sheng)產(chan)(chan)能(neng)力大,可連續操(cao)作(zuo); 結(jie)構簡單,操(cao)作(zuo)方(fang)便;故障少(shao),維(wei)修費用(yong)低;適用(yong)范圍(wei)廣,流體(ti)阻力小(xiao),可以(yi)用(yong)它干燥顆料狀(zhuang)物(wu)料,對于那些(xie)附(fu)著性大的(de)物(wu)料也很有(you)(you)利;操(cao)作(zuo)彈性大,生(sheng)產(chan)(chan)上允許產(chan)(chan)品的(de)流量有(you)(you)較大波(bo)動范圍(wei),不會影響(xiang)產(chan)(chan)品的(de)質(zhi)量;清掃容易。