煤粉灰(hui)烘(hong)干機是(shi)煤粉經高溫燃燒后形成的一種似火山灰(hui)質混合材料。

它(ta)是燃燒煤的(de)(de)(de)發電廠將煤磨成(cheng)(cheng)(cheng)100微(wei)米以下的(de)(de)(de)煤粉，用(yong)預(yu)熱空氣噴入爐膛經(jing)燃燒形成(cheng)(cheng)(cheng)懸浮狀態，產生(sheng)混雜有(you)大量(liang)不燃物的(de)(de)(de)高溫煙氣，經(jing)集(ji)塵裝置捕集(ji)就得到了(le)粉煤灰(hui)。粉煤灰(hui)的(de)(de)(de)化學(xue)組(zu)成(cheng)(cheng)(cheng)與粘土(tu)質相(xiang)似，主要(yao)成(cheng)(cheng)(cheng)分為二氧(yang)化硅(gui)、三(san)氧(yang)化二鋁、三(san)氧(yang)化二鐵、氧(yang)化鈣和未燃盡碳。

工作(zuo)原理

濕粉煤(mei)灰由(you)供料(liao)(liao)(liao)裝置進入(ru)三層(ceng)(ceng)(ceng)滾筒(tong)的(de)內(nei)層(ceng)(ceng)(ceng),實(shi)(shi)現順(shun)流烘干(gan)(gan), 粉煤(mei)灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)的(de)抄板(ban)下(xia)不(bu)斷抄起、散落(luo)呈螺(luo)旋行(xing)(xing)(xing)進式實(shi)(shi)現熱(re)交換，物(wu)(wu)(wu)料(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)的(de)另一端進入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)，進行(xing)(xing)(xing)逆流烘干(gan)(gan)，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)不(bu)斷地(di)被反復揚進，呈進兩步退一步的(de)行(xing)(xing)(xing)進方式，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)既(ji)充分(fen)(fen)吸收內(nei)層(ceng)(ceng)(ceng)滾筒(tong)散發(fa)的(de)熱(re)量，又吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)滾筒(tong)的(de)熱(re)量，同時又延長了干(gan)(gan)燥時間，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此(ci)達(da)(da)到干(gan)(gan)燥狀(zhuang)態。物(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)另一端而落(luo)入(ru)外層(ceng)(ceng)(ceng)，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈矩(ju)形多(duo)回路方式行(xing)(xing)(xing)進，達(da)(da)到干(gan)(gan)燥效(xiao)果的(de)物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)熱(re)風作(zuo)用(yong)下(xia)快速行(xing)(xing)(xing)進排出滾筒(tong)，沒有(you)達(da)(da)到干(gan)(gan)燥效(xiao)果的(de)濕物(wu)(wu)(wu)料(liao)(liao)(liao)因自重而不(bu)能快速行(xing)(xing)(xing)進，物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此(ci)矩(ju)形抄板(ban)內(nei)進行(xing)(xing)(xing)充分(fen)(fen)干(gan)(gan)燥，由(you)此(ci)達(da)(da)到干(gan)(gan)燥效(xiao)果，完成(cheng)干(gan)(gan)燥過程(cheng)。

設備(bei)特點

該設備與(yu)其他干燥設備相比(bi)，生產(chan)能力(li)大，可連續操(cao)作； 結構(gou)簡單，操(cao)作方便；故障少，維修費用(yong)低；適(shi)用(yong)范圍(wei)廣(guang)，流體阻力(li)小，可以用(yong)它干燥顆料(liao)狀物(wu)料(liao)，對(dui)于那(nei)些附著性大的物(wu)料(liao)也(ye)很有利；操(cao)作彈性大，生產(chan)上(shang)允許產(chan)品(pin)的流量(liang)有較大波動范圍(wei)，不會影響產(chan)品(pin)的質量(liang)；清掃容(rong)易。