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(shao)煤的(de)發電廠(chang)將煤磨成(cheng)100微米(mi)以(yi)下的(de)煤粉,用預熱空(kong)氣噴入爐膛(tang)經燃燒(shao)形成(cheng)懸浮狀態,產(chan)生混雜有(you)大量不燃物(wu)的(de)高(gao)溫煙氣,經集(ji)塵裝(zhuang)置捕(bu)集(ji)就得到了(le)粉煤灰。粉煤灰的(de)化(hua)(hua)學組成(cheng)與粘土(tu)質(zhi)相似,主要成(cheng)分為(wei)二(er)氧化(hua)(hua)硅(gui)、三氧化(hua)(hua)二(er)鋁、三氧化(hua)(hua)二(er)鐵、氧化(hua)(hua)鈣和未燃盡碳。
工作原(yuan)理(li)
濕粉(fen)煤灰由(you)供料(liao)裝置進(jin)(jin)(jin)(jin)入三層(ceng)滾(gun)筒(tong)(tong)的(de)(de)內(nei)(nei)層(ceng),實現順流烘干(gan)(gan), 粉(fen)煤灰在(zai)(zai)內(nei)(nei)層(ceng)的(de)(de)抄(chao)板下(xia)不斷抄(chao)起、散(san)落(luo)(luo)呈(cheng)螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)式實現熱(re)交換,物(wu)(wu)(wu)料(liao)移(yi)動至(zhi)內(nei)(nei)層(ceng)的(de)(de)另(ling)一(yi)端進(jin)(jin)(jin)(jin)入中(zhong)(zhong)(zhong)(zhong)(zhong)層(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)逆流烘干(gan)(gan),物(wu)(wu)(wu)料(liao)在(zai)(zai)中(zhong)(zhong)(zhong)(zhong)(zhong)層(ceng)不斷地被反(fan)復揚進(jin)(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)(jin)兩步退一(yi)步的(de)(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方式,物(wu)(wu)(wu)料(liao)在(zai)(zai)中(zhong)(zhong)(zhong)(zhong)(zhong)層(ceng)既充分吸收內(nei)(nei)層(ceng)滾(gun)筒(tong)(tong)散(san)發的(de)(de)熱(re)量(liang),又吸收中(zhong)(zhong)(zhong)(zhong)(zhong)層(ceng)滾(gun)筒(tong)(tong)的(de)(de)熱(re)量(liang),同(tong)時又延長(chang)了(le)干(gan)(gan)燥(zao)時間,物(wu)(wu)(wu)料(liao)在(zai)(zai)此達(da)到(dao)干(gan)(gan)燥(zao)狀態。物(wu)(wu)(wu)料(liao)行(xing)(xing)至(zhi)中(zhong)(zhong)(zhong)(zhong)(zhong)層(ceng)另(ling)一(yi)端而落(luo)(luo)入外層(ceng),物(wu)(wu)(wu)料(liao)在(zai)(zai)外層(ceng)滾(gun)筒(tong)(tong)內(nei)(nei)呈(cheng)矩形多回路方式行(xing)(xing)進(jin)(jin)(jin)(jin),達(da)到(dao)干(gan)(gan)燥(zao)效(xiao)果的(de)(de)物(wu)(wu)(wu)料(liao)在(zai)(zai)熱(re)風(feng)作用下(xia)快速(su)行(xing)(xing)進(jin)(jin)(jin)(jin)排出滾(gun)筒(tong)(tong),沒有達(da)到(dao)干(gan)(gan)燥(zao)效(xiao)果的(de)(de)濕物(wu)(wu)(wu)料(liao)因自重而不能快速(su)行(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)(wu)料(liao)在(zai)(zai)此矩形抄(chao)板內(nei)(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充分干(gan)(gan)燥(zao),由(you)此達(da)到(dao)干(gan)(gan)燥(zao)效(xiao)果,完成干(gan)(gan)燥(zao)過程。
設備特點
該(gai)設備與其他干燥(zao)(zao)設備相比,生產能力大,可連續(xu)操作(zuo)(zuo); 結(jie)構(gou)簡單,操作(zuo)(zuo)方(fang)便;故障少(shao),維修(xiu)費(fei)用低;適(shi)用范圍廣,流體(ti)阻力小,可以用它干燥(zao)(zao)顆料(liao)狀(zhuang)物料(liao),對(dui)于那些附著性大的物料(liao)也很有(you)利;操作(zuo)(zuo)彈性大,生產上允許(xu)產品的流量有(you)較大波動范圍,不會影響產品的質(zhi)量;清掃容易(yi)。