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)是燃(ran)燒(shao)煤(mei)(mei)(mei)的發電廠將煤(mei)(mei)(mei)磨成(cheng)100微(wei)米以(yi)下的煤(mei)(mei)(mei)粉(fen),用預熱空氣(qi)噴入爐膛(tang)經燃(ran)燒(shao)形(xing)成(cheng)懸浮狀態(tai),產生混雜有大量(liang)不燃(ran)物的高(gao)溫煙氣(qi),經集(ji)塵(chen)裝(zhuang)置(zhi)捕集(ji)就得到了粉(fen)煤(mei)(mei)(mei)灰。粉(fen)煤(mei)(mei)(mei)灰的化學組成(cheng)與(yu)粘土質相似,主要(yao)成(cheng)分為二(er)氧(yang)化硅、三(san)氧(yang)化二(er)鋁、三(san)氧(yang)化二(er)鐵(tie)、氧(yang)化鈣和未燃(ran)盡碳。
工作(zuo)原(yuan)理(li)
濕粉(fen)煤灰(hui)由供料(liao)(liao)(liao)(liao)(liao)(liao)裝(zhuang)置進(jin)(jin)入三層(ceng)滾(gun)筒(tong)(tong)(tong)的內(nei)(nei)層(ceng),實現順流(liu)烘(hong)干(gan), 粉(fen)煤灰(hui)在(zai)(zai)內(nei)(nei)層(ceng)的抄板(ban)下不(bu)斷抄起、散(san)落(luo)呈(cheng)螺旋(xuan)行(xing)(xing)(xing)進(jin)(jin)式(shi)(shi)實現熱交換,物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)移動至內(nei)(nei)層(ceng)的另(ling)一端進(jin)(jin)入中層(ceng),進(jin)(jin)行(xing)(xing)(xing)逆流(liu)烘(hong)干(gan),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)不(bu)斷地被反復揚進(jin)(jin),呈(cheng)進(jin)(jin)兩步(bu)退一步(bu)的行(xing)(xing)(xing)進(jin)(jin)方(fang)式(shi)(shi),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)既充分吸收內(nei)(nei)層(ceng)滾(gun)筒(tong)(tong)(tong)散(san)發的熱量,又(you)(you)吸收中層(ceng)滾(gun)筒(tong)(tong)(tong)的熱量,同時又(you)(you)延長了干(gan)燥(zao)時間(jian),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此達(da)到(dao)干(gan)燥(zao)狀態。物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)行(xing)(xing)(xing)至中層(ceng)另(ling)一端而落(luo)入外(wai)層(ceng),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)(zai)外(wai)層(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)(nei)呈(cheng)矩形多回路(lu)方(fang)式(shi)(shi)行(xing)(xing)(xing)進(jin)(jin),達(da)到(dao)干(gan)燥(zao)效(xiao)果(guo)的物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)(zai)熱風作用下快速(su)(su)行(xing)(xing)(xing)進(jin)(jin)排出滾(gun)筒(tong)(tong)(tong),沒有達(da)到(dao)干(gan)燥(zao)效(xiao)果(guo)的濕物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)因自重而不(bu)能快速(su)(su)行(xing)(xing)(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此矩形抄板(ban)內(nei)(nei)進(jin)(jin)行(xing)(xing)(xing)充分干(gan)燥(zao),由此達(da)到(dao)干(gan)燥(zao)效(xiao)果(guo),完(wan)成干(gan)燥(zao)過程。
設備(bei)特點
該設備(bei)與(yu)其他干燥設備(bei)相比,生產(chan)(chan)能(neng)力(li)大,可連續操(cao)作; 結構簡(jian)單,操(cao)作方便;故障(zhang)少,維(wei)修(xiu)費用低;適用范圍廣,流(liu)體阻(zu)力(li)小,可以用它(ta)干燥顆料(liao)狀物料(liao),對于那些附著性大的(de)物料(liao)也很有利;操(cao)作彈性大,生產(chan)(chan)上(shang)允許產(chan)(chan)品(pin)的(de)流(liu)量有較大波動(dong)范圍,不會影響產(chan)(chan)品(pin)的(de)質(zhi)量;清(qing)掃容易。