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)的(de)發(fa)電廠(chang)將(jiang)煤(mei)磨成(cheng)100微米以下的(de)煤(mei)粉(fen)，用預熱(re)空氣(qi)(qi)噴入爐膛經燃燒(shao)形(xing)成(cheng)懸浮(fu)狀態(tai)，產生混雜(za)有(you)大量不(bu)燃物的(de)高溫煙氣(qi)(qi)，經集塵裝置捕(bu)集就(jiu)得到(dao)了(le)粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)化(hua)學(xue)組成(cheng)與粘土質相似，主要成(cheng)分為(wei)二氧(yang)化(hua)硅(gui)、三氧(yang)化(hua)二鋁、三氧(yang)化(hua)二鐵、氧(yang)化(hua)鈣和未燃盡碳。

工作原理

濕(shi)粉(fen)煤灰(hui)由(you)(you)供料(liao)裝置進(jin)(jin)入(ru)(ru)三層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)內層(ceng)(ceng)(ceng)(ceng)(ceng),實現順流烘(hong)干, 粉(fen)煤灰(hui)在內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)抄(chao)板(ban)下(xia)不(bu)斷抄(chao)起、散落呈(cheng)(cheng)螺旋行(xing)(xing)進(jin)(jin)式(shi)(shi)實現熱交換，物(wu)料(liao)移動至(zhi)內層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)另一(yi)(yi)端(duan)進(jin)(jin)入(ru)(ru)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)行(xing)(xing)逆(ni)流烘(hong)干，物(wu)料(liao)在中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反復揚進(jin)(jin)，呈(cheng)(cheng)進(jin)(jin)兩步退一(yi)(yi)步的(de)行(xing)(xing)進(jin)(jin)方式(shi)(shi)，物(wu)料(liao)在中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既充(chong)分(fen)吸(xi)收內層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散發的(de)熱量(liang)，又吸(xi)收中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)熱量(liang)，同(tong)時又延(yan)長了干燥(zao)時間，物(wu)料(liao)在此達(da)到(dao)(dao)干燥(zao)狀(zhuang)態(tai)。物(wu)料(liao)行(xing)(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)(yi)端(duan)而(er)(er)落入(ru)(ru)外層(ceng)(ceng)(ceng)(ceng)(ceng)，物(wu)料(liao)在外層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內呈(cheng)(cheng)矩(ju)(ju)形多(duo)回路方式(shi)(shi)行(xing)(xing)進(jin)(jin)，達(da)到(dao)(dao)干燥(zao)效果的(de)物(wu)料(liao)在熱風作用下(xia)快速行(xing)(xing)進(jin)(jin)排(pai)出滾(gun)筒(tong)，沒有達(da)到(dao)(dao)干燥(zao)效果的(de)濕(shi)物(wu)料(liao)因(yin)自重(zhong)而(er)(er)不(bu)能快速行(xing)(xing)進(jin)(jin)，物(wu)料(liao)在此矩(ju)(ju)形抄(chao)板(ban)內進(jin)(jin)行(xing)(xing)充(chong)分(fen)干燥(zao)，由(you)(you)此達(da)到(dao)(dao)干燥(zao)效果，完成(cheng)干燥(zao)過程。

設備特點

該設備與其(qi)他干燥設備相(xiang)比，生(sheng)產(chan)(chan)能力大(da)，可連續操作(zuo)； 結(jie)構(gou)簡單，操作(zuo)方便；故(gu)障(zhang)少(shao)，維修費用(yong)(yong)低；適用(yong)(yong)范(fan)(fan)圍(wei)廣(guang)，流(liu)(liu)體阻(zu)力小，可以用(yong)(yong)它干燥顆料(liao)(liao)狀物料(liao)(liao)，對于那些附著(zhu)性大(da)的物料(liao)(liao)也(ye)很有利；操作(zuo)彈性大(da)，生(sheng)產(chan)(chan)上允(yun)許產(chan)(chan)品的流(liu)(liu)量(liang)有較(jiao)大(da)波(bo)動范(fan)(fan)圍(wei)，不會影響產(chan)(chan)品的質量(liang)；清掃容易。