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(shi)燃(ran)燒煤(mei)的(de)發電廠(chang)將煤(mei)磨成100微(wei)米以下的(de)煤(mei)粉(fen)，用(yong)預熱空氣(qi)(qi)噴入爐膛經(jing)燃(ran)燒形成懸(xuan)浮狀態，產(chan)生(sheng)混雜有大量不燃(ran)物的(de)高(gao)溫(wen)煙氣(qi)(qi)，經(jing)集(ji)塵(chen)裝(zhuang)置(zhi)捕集(ji)就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)化(hua)學(xue)組成與粘土質相似，主要(yao)成分為二氧化(hua)硅(gui)、三(san)氧化(hua)二鋁、三(san)氧化(hua)二鐵、氧化(hua)鈣和未燃(ran)盡碳。

工作原理

濕(shi)粉煤灰由供料(liao)(liao)(liao)裝(zhuang)置進(jin)入三層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的內(nei)層(ceng)(ceng)(ceng)(ceng),實(shi)現(xian)順(shun)流烘干(gan), 粉煤灰在(zai)(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的抄(chao)(chao)板下(xia)不斷抄(chao)(chao)起、散(san)(san)落(luo)呈螺旋行(xing)(xing)(xing)進(jin)式(shi)實(shi)現(xian)熱(re)交換(huan)，物(wu)(wu)料(liao)(liao)(liao)移動至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)的另一端進(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)行(xing)(xing)(xing)逆(ni)流烘干(gan)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不斷地被反(fan)復揚進(jin)，呈進(jin)兩步退一步的行(xing)(xing)(xing)進(jin)方(fang)式(shi)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既(ji)充(chong)分(fen)吸(xi)收內(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)散(san)(san)發的熱(re)量(liang)，又(you)吸(xi)收中(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的熱(re)量(liang)，同(tong)時又(you)延長了干(gan)燥(zao)(zao)時間(jian)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)此(ci)(ci)(ci)達(da)到(dao)(dao)干(gan)燥(zao)(zao)狀(zhuang)態。物(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)(ceng)另一端而(er)落(luo)入外層(ceng)(ceng)(ceng)(ceng)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)內(nei)呈矩(ju)(ju)形多回路方(fang)式(shi)行(xing)(xing)(xing)進(jin)，達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果的物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)熱(re)風作用下(xia)快(kuai)速行(xing)(xing)(xing)進(jin)排出滾(gun)(gun)筒(tong)(tong)，沒有(you)達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果的濕(shi)物(wu)(wu)料(liao)(liao)(liao)因自重而(er)不能快(kuai)速行(xing)(xing)(xing)進(jin)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)(zai)此(ci)(ci)(ci)矩(ju)(ju)形抄(chao)(chao)板內(nei)進(jin)行(xing)(xing)(xing)充(chong)分(fen)干(gan)燥(zao)(zao)，由此(ci)(ci)(ci)達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果，完成(cheng)干(gan)燥(zao)(zao)過程。

設備特點

該設備(bei)與其(qi)他干燥(zao)設備(bei)相比(bi)，生產(chan)能力大(da)，可連續操(cao)作(zuo)； 結構簡單(dan)，操(cao)作(zuo)方便；故障(zhang)少，維(wei)修費(fei)用(yong)低；適用(yong)范圍廣，流體(ti)阻力小，可以用(yong)它(ta)干燥(zao)顆料狀物料，對于那些(xie)附著性大(da)的物料也很有(you)利；操(cao)作(zuo)彈性大(da)，生產(chan)上允許產(chan)品的流量有(you)較大(da)波動范圍，不會影(ying)響產(chan)品的質量；清(qing)掃容易。