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)燒煤(mei)的(de)發(fa)電廠將煤(mei)磨(mo)成(cheng)100微米以下的(de)煤(mei)粉,用預熱空氣噴(pen)入爐膛經(jing)燃(ran)燒形成(cheng)懸浮狀態,產生混雜有大量不燃(ran)物(wu)的(de)高溫煙氣,經(jing)集(ji)塵裝置捕集(ji)就得(de)到了(le)粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)(hua)學組成(cheng)與粘土(tu)質相似,主要成(cheng)分(fen)為二(er)氧(yang)(yang)化(hua)(hua)硅、三氧(yang)(yang)化(hua)(hua)二(er)鋁(lv)、三氧(yang)(yang)化(hua)(hua)二(er)鐵、氧(yang)(yang)化(hua)(hua)鈣和未燃(ran)盡碳。
工(gong)作原理
濕(shi)粉煤灰由(you)供料(liao)裝置(zhi)進(jin)(jin)(jin)(jin)入(ru)三層(ceng)(ceng)滾筒(tong)(tong)的(de)(de)(de)內(nei)層(ceng)(ceng),實現順流(liu)烘(hong)干(gan)(gan), 粉煤灰在內(nei)層(ceng)(ceng)的(de)(de)(de)抄(chao)(chao)板下不(bu)斷(duan)抄(chao)(chao)起、散落(luo)呈(cheng)螺旋(xuan)行(xing)(xing)進(jin)(jin)(jin)(jin)式實現熱(re)交換,物(wu)(wu)料(liao)移動至(zhi)內(nei)層(ceng)(ceng)的(de)(de)(de)另一(yi)端(duan)進(jin)(jin)(jin)(jin)入(ru)中層(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)逆流(liu)烘(hong)干(gan)(gan),物(wu)(wu)料(liao)在中層(ceng)(ceng)不(bu)斷(duan)地被反復揚進(jin)(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)(jin)兩(liang)步退一(yi)步的(de)(de)(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方式,物(wu)(wu)料(liao)在中層(ceng)(ceng)既充分吸收(shou)內(nei)層(ceng)(ceng)滾筒(tong)(tong)散發的(de)(de)(de)熱(re)量(liang),又吸收(shou)中層(ceng)(ceng)滾筒(tong)(tong)的(de)(de)(de)熱(re)量(liang),同時又延長了干(gan)(gan)燥(zao)(zao)(zao)時間(jian),物(wu)(wu)料(liao)在此達(da)到(dao)干(gan)(gan)燥(zao)(zao)(zao)狀態。物(wu)(wu)料(liao)行(xing)(xing)至(zhi)中層(ceng)(ceng)另一(yi)端(duan)而落(luo)入(ru)外(wai)層(ceng)(ceng),物(wu)(wu)料(liao)在外(wai)層(ceng)(ceng)滾筒(tong)(tong)內(nei)呈(cheng)矩形多(duo)回(hui)路方式行(xing)(xing)進(jin)(jin)(jin)(jin),達(da)到(dao)干(gan)(gan)燥(zao)(zao)(zao)效果(guo)的(de)(de)(de)物(wu)(wu)料(liao)在熱(re)風作用下快速行(xing)(xing)進(jin)(jin)(jin)(jin)排出(chu)滾筒(tong)(tong),沒有達(da)到(dao)干(gan)(gan)燥(zao)(zao)(zao)效果(guo)的(de)(de)(de)濕(shi)物(wu)(wu)料(liao)因自重(zhong)而不(bu)能快速行(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)料(liao)在此矩形抄(chao)(chao)板內(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充分干(gan)(gan)燥(zao)(zao)(zao),由(you)此達(da)到(dao)干(gan)(gan)燥(zao)(zao)(zao)效果(guo),完成(cheng)干(gan)(gan)燥(zao)(zao)(zao)過程。
設備特點
該設備與(yu)其他干燥(zao)設備相比,生產能力大(da),可連續操(cao)作; 結構簡單(dan),操(cao)作方便(bian);故(gu)障少(shao),維修費用(yong)低;適(shi)用(yong)范圍(wei)廣,流體阻力小,可以(yi)用(yong)它干燥(zao)顆料狀物(wu)料,對于那些附著性大(da)的物(wu)料也很(hen)有利;操(cao)作彈性大(da),生產上允許產品的流量(liang)有較大(da)波動范圍(wei),不會(hui)影響產品的質(zhi)量(liang);清掃(sao)容易。