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。
它是燃燒煤(mei)的發(fa)電廠將煤(mei)磨成(cheng)100微(wei)米(mi)以下的煤(mei)粉(fen),用預(yu)熱空氣(qi)噴入爐膛經燃燒形成(cheng)懸浮狀態,產生混雜有大(da)量(liang)不燃物的高溫煙氣(qi),經集塵裝置捕集就得到了粉(fen)煤(mei)灰(hui)。粉(fen)煤(mei)灰(hui)的化學組成(cheng)與粘土質相似,主要成(cheng)分為(wei)二氧(yang)(yang)(yang)化硅、三(san)氧(yang)(yang)(yang)化二鋁(lv)、三(san)氧(yang)(yang)(yang)化二鐵、氧(yang)(yang)(yang)化鈣和未燃盡(jin)碳。
工作原(yuan)理
濕(shi)粉煤灰由供(gong)料(liao)裝置進(jin)入(ru)三層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的內(nei)(nei)(nei)層(ceng)(ceng),實(shi)現(xian)順流(liu)(liu)烘(hong)干(gan), 粉煤灰在(zai)內(nei)(nei)(nei)層(ceng)(ceng)的抄(chao)板下不(bu)斷抄(chao)起、散(san)落(luo)呈(cheng)螺旋行(xing)(xing)進(jin)式實(shi)現(xian)熱(re)交換,物料(liao)移(yi)動(dong)至內(nei)(nei)(nei)層(ceng)(ceng)的另(ling)一(yi)(yi)端進(jin)入(ru)中(zhong)(zhong)(zhong)層(ceng)(ceng),進(jin)行(xing)(xing)逆流(liu)(liu)烘(hong)干(gan),物料(liao)在(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)不(bu)斷地被反復揚進(jin),呈(cheng)進(jin)兩(liang)步(bu)退一(yi)(yi)步(bu)的行(xing)(xing)進(jin)方式,物料(liao)在(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)既充(chong)分吸(xi)收內(nei)(nei)(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)散(san)發的熱(re)量(liang),又吸(xi)收中(zhong)(zhong)(zhong)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的熱(re)量(liang),同時又延長了干(gan)燥(zao)(zao)時間,物料(liao)在(zai)此達(da)到(dao)(dao)干(gan)燥(zao)(zao)狀態(tai)。物料(liao)行(xing)(xing)至中(zhong)(zhong)(zhong)層(ceng)(ceng)另(ling)一(yi)(yi)端而(er)落(luo)入(ru)外(wai)層(ceng)(ceng),物料(liao)在(zai)外(wai)層(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)(nei)(nei)呈(cheng)矩形多(duo)回路(lu)方式行(xing)(xing)進(jin),達(da)到(dao)(dao)干(gan)燥(zao)(zao)效果(guo)的物料(liao)在(zai)熱(re)風作(zuo)用下快(kuai)速(su)行(xing)(xing)進(jin)排出滾(gun)筒(tong)(tong)(tong),沒有達(da)到(dao)(dao)干(gan)燥(zao)(zao)效果(guo)的濕(shi)物料(liao)因(yin)自重(zhong)而(er)不(bu)能快(kuai)速(su)行(xing)(xing)進(jin),物料(liao)在(zai)此矩形抄(chao)板內(nei)(nei)(nei)進(jin)行(xing)(xing)充(chong)分干(gan)燥(zao)(zao),由此達(da)到(dao)(dao)干(gan)燥(zao)(zao)效果(guo),完成(cheng)干(gan)燥(zao)(zao)過程。
設備特點
該(gai)設備(bei)(bei)與其他干燥設備(bei)(bei)相比,生(sheng)產(chan)能力大(da),可連續(xu)操作; 結構簡單,操作方便(bian);故障少,維修費(fei)用低;適用范圍(wei)廣,流(liu)體阻力小(xiao),可以用它干燥顆料狀物料,對于那些附著(zhu)性大(da)的物料也很有利;操作彈性大(da),生(sheng)產(chan)上允許產(chan)品的流(liu)量(liang)有較(jiao)大(da)波動范圍(wei),不會影(ying)響產(chan)品的質量(liang);清(qing)掃(sao)容易。