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)(ran)燒(shao)煤(mei)的(de)發電廠將(jiang)煤(mei)磨(mo)成(cheng)100微米以(yi)下的(de)煤(mei)粉(fen)，用(yong)預熱(re)空氣(qi)噴入(ru)爐膛(tang)經燃(ran)(ran)燒(shao)形成(cheng)懸浮(fu)狀態，產生混雜(za)有大(da)量不燃(ran)(ran)物的(de)高溫煙氣(qi)，經集塵裝(zhuang)置捕集就得(de)到了(le)粉(fen)煤(mei)灰(hui)。粉(fen)煤(mei)灰(hui)的(de)化學組成(cheng)與粘土(tu)質相似，主要成(cheng)分為二氧化硅、三氧化二鋁、三氧化二鐵、氧化鈣(gai)和未燃(ran)(ran)盡碳(tan)。

工作原理

濕(shi)粉煤灰由供料(liao)(liao)(liao)裝置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng),實現順流(liu)(liu)烘干(gan), 粉煤灰在(zai)內(nei)層(ceng)(ceng)(ceng)的(de)(de)抄板下不(bu)斷(duan)抄起、散落呈(cheng)(cheng)螺旋行(xing)(xing)(xing)(xing)進(jin)(jin)式實現熱交換，物(wu)(wu)(wu)料(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)的(de)(de)另(ling)一(yi)端進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng)，進(jin)(jin)行(xing)(xing)(xing)(xing)逆流(liu)(liu)烘干(gan)，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不(bu)斷(duan)地(di)被反(fan)復揚進(jin)(jin)，呈(cheng)(cheng)進(jin)(jin)兩步退一(yi)步的(de)(de)行(xing)(xing)(xing)(xing)進(jin)(jin)方式，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既(ji)充(chong)(chong)分吸(xi)收內(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)散發的(de)(de)熱量，又吸(xi)收中(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)的(de)(de)熱量，同時又延長了干(gan)燥(zao)(zao)時間，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)此(ci)達(da)到(dao)(dao)干(gan)燥(zao)(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)另(ling)一(yi)端而落入(ru)外層(ceng)(ceng)(ceng)，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)內(nei)呈(cheng)(cheng)矩形多回路(lu)方式行(xing)(xing)(xing)(xing)進(jin)(jin)，達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果的(de)(de)物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)熱風作用(yong)下快(kuai)速(su)(su)行(xing)(xing)(xing)(xing)進(jin)(jin)排出滾(gun)(gun)筒(tong)，沒有達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果的(de)(de)濕(shi)物(wu)(wu)(wu)料(liao)(liao)(liao)因自重而不(bu)能快(kuai)速(su)(su)行(xing)(xing)(xing)(xing)進(jin)(jin)，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)此(ci)矩形抄板內(nei)進(jin)(jin)行(xing)(xing)(xing)(xing)充(chong)(chong)分干(gan)燥(zao)(zao)，由此(ci)達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果，完成干(gan)燥(zao)(zao)過程。

設備特點(dian)

該設(she)備與其他干(gan)燥設(she)備相比，生(sheng)產(chan)能力大，可連續操作； 結(jie)構(gou)簡單，操作方便(bian)；故障少，維修費用(yong)低；適用(yong)范圍廣，流(liu)體阻(zu)力小，可以用(yong)它干(gan)燥顆(ke)料狀物料，對于那些附著性(xing)大的物料也很有(you)利；操作彈性(xing)大，生(sheng)產(chan)上允許產(chan)品的流(liu)量(liang)有(you)較大波(bo)動范圍，不會影(ying)響(xiang)產(chan)品的質量(liang)；清掃容易(yi)。