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)的發(fa)電廠將煤(mei)磨(mo)成(cheng)100微米以下的煤(mei)粉，用預熱空(kong)氣噴入爐膛(tang)經燃(ran)燒形成(cheng)懸浮狀態，產生(sheng)混雜有大(da)量不燃(ran)物(wu)的高溫煙(yan)氣，經集塵(chen)裝置捕集就得到(dao)了粉煤(mei)灰(hui)。粉煤(mei)灰(hui)的化(hua)(hua)學組(zu)成(cheng)與(yu)粘土(tu)質(zhi)相似，主要成(cheng)分(fen)為二(er)氧(yang)(yang)化(hua)(hua)硅(gui)、三氧(yang)(yang)化(hua)(hua)二(er)鋁、三氧(yang)(yang)化(hua)(hua)二(er)鐵(tie)、氧(yang)(yang)化(hua)(hua)鈣和未燃(ran)盡碳。

工作原理

濕粉煤灰由供料(liao)(liao)裝置進(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng),實(shi)現順流(liu)烘干(gan)(gan), 粉煤灰在(zai)(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)板(ban)下(xia)不(bu)斷抄(chao)起(qi)、散落(luo)呈(cheng)螺(luo)旋行(xing)進(jin)(jin)(jin)式實(shi)現熱(re)交換，物(wu)(wu)料(liao)(liao)移動(dong)至內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)另(ling)(ling)一(yi)端進(jin)(jin)(jin)入中(zhong)(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)(jin)行(xing)逆流(liu)烘干(gan)(gan)，物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地(di)被(bei)反(fan)復揚進(jin)(jin)(jin)，呈(cheng)進(jin)(jin)(jin)兩(liang)步退一(yi)步的(de)(de)行(xing)進(jin)(jin)(jin)方式，物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既(ji)充分吸收(shou)(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散發(fa)的(de)(de)熱(re)量，又(you)吸收(shou)(shou)中(zhong)(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)熱(re)量，同時又(you)延長(chang)了干(gan)(gan)燥時間，物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)此(ci)達(da)到(dao)干(gan)(gan)燥狀態。物(wu)(wu)料(liao)(liao)行(xing)至中(zhong)(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另(ling)(ling)一(yi)端而落(luo)入外層(ceng)(ceng)(ceng)(ceng)(ceng)，物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)呈(cheng)矩形(xing)多回路方式行(xing)進(jin)(jin)(jin)，達(da)到(dao)干(gan)(gan)燥效(xiao)果(guo)的(de)(de)物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)熱(re)風作用下(xia)快(kuai)速(su)(su)行(xing)進(jin)(jin)(jin)排出滾(gun)筒(tong)，沒有達(da)到(dao)干(gan)(gan)燥效(xiao)果(guo)的(de)(de)濕物(wu)(wu)料(liao)(liao)因自重而不(bu)能快(kuai)速(su)(su)行(xing)進(jin)(jin)(jin)，物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)此(ci)矩形(xing)抄(chao)板(ban)內(nei)進(jin)(jin)(jin)行(xing)充分干(gan)(gan)燥，由此(ci)達(da)到(dao)干(gan)(gan)燥效(xiao)果(guo)，完成干(gan)(gan)燥過程。

設備特點

該設備與其(qi)他干燥設備相比(bi)，生產(chan)能力(li)大，可連續操作； 結(jie)構(gou)簡單，操作方(fang)便；故障少(shao)，維修費(fei)用(yong)低；適用(yong)范(fan)圍(wei)廣，流體(ti)阻力(li)小，可以用(yong)它(ta)干燥顆料(liao)狀物(wu)料(liao)，對(dui)于(yu)那些附著性大的(de)物(wu)料(liao)也(ye)很有利；操作彈性大，生產(chan)上允許產(chan)品(pin)的(de)流量有較(jiao)大波動范(fan)圍(wei)，不會影(ying)響產(chan)品(pin)的(de)質(zhi)量；清掃容(rong)易。