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(ran)燒(shao)煤(mei)的(de)發電廠將煤(mei)磨成(cheng)(cheng)100微(wei)米以(yi)下的(de)煤(mei)粉(fen),用預熱空(kong)氣(qi)噴(pen)入爐膛經(jing)燃(ran)燒(shao)形成(cheng)(cheng)懸浮(fu)狀(zhuang)態,產生(sheng)混(hun)雜有大量(liang)不燃(ran)物的(de)高溫煙氣(qi),經(jing)集塵裝置捕(bu)集就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)化(hua)(hua)學組(zu)成(cheng)(cheng)與粘土質相似,主要成(cheng)(cheng)分為二氧(yang)化(hua)(hua)硅、三(san)氧(yang)化(hua)(hua)二鋁(lv)、三(san)氧(yang)化(hua)(hua)二鐵、氧(yang)化(hua)(hua)鈣和未燃(ran)盡碳。
工作原理(li)
濕粉煤灰由(you)供料(liao)(liao)(liao)裝置進(jin)(jin)入三(san)層(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng),實現順流烘(hong)干(gan)(gan), 粉煤灰在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)抄板下(xia)(xia)不斷(duan)抄起、散(san)落呈螺旋行(xing)進(jin)(jin)式實現熱(re)交換,物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)移動(dong)至(zhi)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)另一(yi)端進(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)行(xing)逆流烘(hong)干(gan)(gan),物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)不斷(duan)地(di)被反復揚(yang)進(jin)(jin),呈進(jin)(jin)兩步退(tui)一(yi)步的(de)(de)行(xing)進(jin)(jin)方式,物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)既(ji)充(chong)分吸收(shou)內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)筒散(san)發(fa)的(de)(de)熱(re)量,又吸收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)熱(re)量,同時又延長了干(gan)(gan)燥(zao)(zao)時間,物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)此達(da)(da)到(dao)干(gan)(gan)燥(zao)(zao)狀態。物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)另一(yi)端而落入外(wai)層(ceng)(ceng)(ceng),物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)外(wai)層(ceng)(ceng)(ceng)滾(gun)筒內(nei)(nei)呈矩(ju)形多回路方式行(xing)進(jin)(jin),達(da)(da)到(dao)干(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果的(de)(de)物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)熱(re)風作用下(xia)(xia)快(kuai)速(su)行(xing)進(jin)(jin)排(pai)出滾(gun)筒,沒有達(da)(da)到(dao)干(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果的(de)(de)濕物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)因自(zi)重而不能(neng)快(kuai)速(su)行(xing)進(jin)(jin),物(wu)(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)此矩(ju)形抄板內(nei)(nei)進(jin)(jin)行(xing)充(chong)分干(gan)(gan)燥(zao)(zao),由(you)此達(da)(da)到(dao)干(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果,完(wan)成干(gan)(gan)燥(zao)(zao)過程。
設備特點(dian)
該(gai)設備與(yu)其他干(gan)燥(zao)設備相比,生產能(neng)力大(da),可連(lian)續操(cao)作(zuo); 結構(gou)簡單,操(cao)作(zuo)方便;故障少,維修費用低;適用范圍(wei)廣,流體(ti)阻力小,可以(yi)用它(ta)干(gan)燥(zao)顆(ke)料狀物料,對于那些附著性(xing)大(da)的物料也(ye)很有利;操(cao)作(zuo)彈性(xing)大(da),生產上允許產品的流量有較大(da)波(bo)動(dong)范圍(wei),不會影(ying)響產品的質量;清掃容易。