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)(ran)燒(shao)煤(mei)的(de)發電廠將煤(mei)磨成100微(wei)米以下的(de)煤(mei)粉，用預(yu)熱空氣噴入爐膛經(jing)燃(ran)(ran)燒(shao)形成懸(xuan)浮狀態，產生混雜(za)有(you)大量不(bu)燃(ran)(ran)物的(de)高溫煙氣，經(jing)集塵裝置(zhi)捕集就得到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)學組成與(yu)粘(zhan)土(tu)質相似(si)，主要成分為二氧(yang)化(hua)硅(gui)、三(san)氧(yang)化(hua)二鋁(lv)、三(san)氧(yang)化(hua)二鐵、氧(yang)化(hua)鈣和未燃(ran)(ran)盡碳。

工作原理

濕粉(fen)煤灰由供料(liao)(liao)(liao)(liao)裝置進(jin)(jin)(jin)入(ru)(ru)三層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)內(nei)層(ceng)(ceng)(ceng),實(shi)現順流烘(hong)干(gan)(gan), 粉(fen)煤灰在內(nei)層(ceng)(ceng)(ceng)的(de)抄板下(xia)不(bu)斷(duan)抄起、散落(luo)呈螺旋行(xing)(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)式實(shi)現熱(re)交(jiao)換，物(wu)料(liao)(liao)(liao)(liao)移動(dong)至(zhi)內(nei)層(ceng)(ceng)(ceng)的(de)另一(yi)端(duan)進(jin)(jin)(jin)入(ru)(ru)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)，進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)(xing)逆流烘(hong)干(gan)(gan)，物(wu)料(liao)(liao)(liao)(liao)在中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)不(bu)斷(duan)地(di)被反復揚進(jin)(jin)(jin)，呈進(jin)(jin)(jin)兩步退一(yi)步的(de)行(xing)(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)方(fang)式，物(wu)料(liao)(liao)(liao)(liao)在中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)既充分吸收(shou)內(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)散發的(de)熱(re)量(liang)，又吸收(shou)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)熱(re)量(liang)，同時又延(yan)長了(le)干(gan)(gan)燥(zao)(zao)時間(jian)，物(wu)料(liao)(liao)(liao)(liao)在此達(da)到干(gan)(gan)燥(zao)(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)行(xing)(xing)(xing)(xing)(xing)(xing)至(zhi)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)另一(yi)端(duan)而落(luo)入(ru)(ru)外層(ceng)(ceng)(ceng)，物(wu)料(liao)(liao)(liao)(liao)在外層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)呈矩(ju)形多回路(lu)方(fang)式行(xing)(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)，達(da)到干(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果(guo)的(de)物(wu)料(liao)(liao)(liao)(liao)在熱(re)風作用下(xia)快速行(xing)(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)排出(chu)滾(gun)筒(tong)(tong)(tong)，沒有達(da)到干(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果(guo)的(de)濕物(wu)料(liao)(liao)(liao)(liao)因自重而不(bu)能快速行(xing)(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)，物(wu)料(liao)(liao)(liao)(liao)在此矩(ju)形抄板內(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)(xing)充分干(gan)(gan)燥(zao)(zao)，由此達(da)到干(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果(guo)，完(wan)成干(gan)(gan)燥(zao)(zao)過程(cheng)。

設(she)備特點(dian)

該設備(bei)與其他干燥設備(bei)相比，生產(chan)能力大(da)(da)，可(ke)(ke)連續(xu)操作(zuo)； 結構(gou)簡單(dan)，操作(zuo)方(fang)便；故障少，維修費用(yong)低；適用(yong)范圍(wei)廣，流(liu)體(ti)阻力小，可(ke)(ke)以用(yong)它干燥顆料狀物料，對于(yu)那些附著性大(da)(da)的物料也(ye)很有利；操作(zuo)彈(dan)性大(da)(da)，生產(chan)上(shang)允許產(chan)品的流(liu)量有較大(da)(da)波動范圍(wei)，不(bu)會影響產(chan)品的質量；清掃(sao)容易。