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(shi)燃(ran)(ran)燒煤(mei)的發電廠將煤(mei)磨(mo)成(cheng)100微米(mi)以下的煤(mei)粉(fen)(fen)，用預熱(re)空氣噴入(ru)爐膛經燃(ran)(ran)燒形成(cheng)懸浮狀態(tai)，產生(sheng)混雜有大量(liang)不燃(ran)(ran)物的高(gao)溫煙氣，經集塵裝置捕(bu)集就得到了粉(fen)(fen)煤(mei)灰。粉(fen)(fen)煤(mei)灰的化(hua)(hua)學組(zu)成(cheng)與粘土質相似(si)，主(zhu)要成(cheng)分為二(er)氧(yang)化(hua)(hua)硅、三氧(yang)化(hua)(hua)二(er)鋁、三氧(yang)化(hua)(hua)二(er)鐵、氧(yang)化(hua)(hua)鈣和未(wei)燃(ran)(ran)盡碳。

工作原理

濕(shi)粉煤灰由供料(liao)裝置進(jin)(jin)(jin)入(ru)三(san)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的內(nei)(nei)層(ceng)(ceng)(ceng)(ceng),實現順(shun)流烘干, 粉煤灰在(zai)(zai)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的抄(chao)板(ban)下不斷(duan)(duan)抄(chao)起、散(san)落呈螺旋行(xing)進(jin)(jin)(jin)式(shi)(shi)實現熱(re)交換，物(wu)料(liao)移動(dong)至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的另(ling)一端進(jin)(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)(jin)行(xing)逆流烘干，物(wu)料(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不斷(duan)(duan)地(di)被反復揚進(jin)(jin)(jin)，呈進(jin)(jin)(jin)兩步(bu)退一步(bu)的行(xing)進(jin)(jin)(jin)方(fang)式(shi)(shi)，物(wu)料(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充(chong)分吸收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)散(san)發的熱(re)量，又(you)(you)吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的熱(re)量，同(tong)時又(you)(you)延長了干燥時間(jian)，物(wu)料(liao)在(zai)(zai)此(ci)達(da)(da)(da)(da)到干燥狀態。物(wu)料(liao)行(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一端而(er)落入(ru)外(wai)層(ceng)(ceng)(ceng)(ceng)，物(wu)料(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)(nei)呈矩形多回(hui)路(lu)方(fang)式(shi)(shi)行(xing)進(jin)(jin)(jin)，達(da)(da)(da)(da)到干燥效(xiao)果(guo)的物(wu)料(liao)在(zai)(zai)熱(re)風作用(yong)下快速行(xing)進(jin)(jin)(jin)排出滾(gun)筒(tong)(tong)(tong)，沒(mei)有達(da)(da)(da)(da)到干燥效(xiao)果(guo)的濕(shi)物(wu)料(liao)因(yin)自重而(er)不能快速行(xing)進(jin)(jin)(jin)，物(wu)料(liao)在(zai)(zai)此(ci)矩形抄(chao)板(ban)內(nei)(nei)進(jin)(jin)(jin)行(xing)充(chong)分干燥，由此(ci)達(da)(da)(da)(da)到干燥效(xiao)果(guo)，完成(cheng)干燥過程。

設備(bei)特點

該設備與其他(ta)干燥設備相比，生產能力大(da)，可連(lian)續操作； 結構簡單，操作方便(bian)；故障(zhang)少，維(wei)修費(fei)用低；適用范圍(wei)廣，流體(ti)阻力小(xiao)，可以用它干燥顆(ke)料狀物料，對(dui)于(yu)那些附著性大(da)的物料也很有利；操作彈性大(da)，生產上(shang)允許產品的流量(liang)有較(jiao)大(da)波動范圍(wei)，不會影響產品的質量(liang)；清掃容(rong)易。