煤粉(fen)灰(hui)烘干機是煤粉(fen)經高溫燃(ran)燒后形成的一種(zhong)似(si)火(huo)山(shan)灰(hui)質(zhi)混合(he)材料。
它是燃燒煤(mei)的(de)發(fa)電廠將煤(mei)磨成100微米以下的(de)煤(mei)粉,用預熱空(kong)氣噴入爐膛經燃燒形成懸浮狀態,產(chan)生混雜有大量不燃物的(de)高溫(wen)煙(yan)氣,經集塵裝置捕集就得到了粉煤(mei)灰(hui)。粉煤(mei)灰(hui)的(de)化(hua)(hua)學組成與(yu)粘土質相(xiang)似,主(zhu)要成分(fen)為二(er)氧(yang)(yang)化(hua)(hua)硅(gui)、三氧(yang)(yang)化(hua)(hua)二(er)鋁、三氧(yang)(yang)化(hua)(hua)二(er)鐵、氧(yang)(yang)化(hua)(hua)鈣(gai)和未燃盡碳。
工作原理
濕(shi)粉煤灰由供料(liao)裝置進入三層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)(de)內層(ceng)(ceng)(ceng)(ceng)(ceng),實現順流(liu)(liu)烘(hong)干(gan), 粉煤灰在(zai)(zai)(zai)(zai)內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)抄板下不(bu)斷抄起、散落(luo)呈(cheng)螺(luo)旋行(xing)進式實現熱(re)交(jiao)換,物料(liao)移動至(zhi)內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)另一(yi)端(duan)進入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng),進行(xing)逆(ni)流(liu)(liu)烘(hong)干(gan),物料(liao)在(zai)(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反(fan)復揚(yang)進,呈(cheng)進兩步退一(yi)步的(de)(de)行(xing)進方式,物料(liao)在(zai)(zai)(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既充分吸(xi)收(shou)內層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)散發的(de)(de)熱(re)量,又(you)(you)吸(xi)收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)(de)熱(re)量,同時(shi)又(you)(you)延長了干(gan)燥(zao)(zao)(zao)時(shi)間,物料(liao)在(zai)(zai)(zai)(zai)此達到(dao)干(gan)燥(zao)(zao)(zao)狀態(tai)。物料(liao)行(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端(duan)而落(luo)入外(wai)層(ceng)(ceng)(ceng)(ceng)(ceng),物料(liao)在(zai)(zai)(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)內呈(cheng)矩形(xing)多回路方式行(xing)進,達到(dao)干(gan)燥(zao)(zao)(zao)效(xiao)果(guo)的(de)(de)物料(liao)在(zai)(zai)(zai)(zai)熱(re)風作用下快速行(xing)進排出滾筒(tong)(tong),沒(mei)有(you)達到(dao)干(gan)燥(zao)(zao)(zao)效(xiao)果(guo)的(de)(de)濕(shi)物料(liao)因(yin)自重(zhong)而不(bu)能快速行(xing)進,物料(liao)在(zai)(zai)(zai)(zai)此矩形(xing)抄板內進行(xing)充分干(gan)燥(zao)(zao)(zao),由此達到(dao)干(gan)燥(zao)(zao)(zao)效(xiao)果(guo),完(wan)成干(gan)燥(zao)(zao)(zao)過(guo)程。
設備特點
該設(she)備(bei)(bei)與其他(ta)干燥設(she)備(bei)(bei)相比,生產能力(li)大,可連(lian)續操作(zuo); 結構(gou)簡(jian)單,操作(zuo)方便;故(gu)障少,維修費用(yong)低;適用(yong)范圍廣,流體阻力(li)小,可以用(yong)它干燥顆(ke)料(liao)狀物(wu)料(liao),對(dui)于那些附著性大的(de)物(wu)料(liao)也很有(you)利(li);操作(zuo)彈性大,生產上允許產品(pin)的(de)流量有(you)較大波(bo)動范圍,不會(hui)影響產品(pin)的(de)質量;清掃容易。