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)(ran)燒煤(mei)的(de)發(fa)電(dian)廠(chang)將煤(mei)磨成100微米以(yi)下的(de)煤(mei)粉,用預熱空氣噴入爐膛經燃(ran)(ran)燒形成懸(xuan)浮狀態,產(chan)生(sheng)混雜有大量不(bu)燃(ran)(ran)物的(de)高(gao)溫(wen)煙氣,經集塵裝置捕(bu)集就得到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)(hua)學(xue)組(zu)成與(yu)粘土質相似,主要成分為二氧化(hua)(hua)硅、三(san)氧化(hua)(hua)二鋁、三(san)氧化(hua)(hua)二鐵、氧化(hua)(hua)鈣(gai)和未燃(ran)(ran)盡碳。
工作原理
濕粉煤(mei)灰由供料裝置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)內層(ceng)(ceng)(ceng)(ceng),實現順流烘(hong)(hong)干(gan), 粉煤(mei)灰在(zai)內層(ceng)(ceng)(ceng)(ceng)的(de)抄(chao)板下不斷抄(chao)起、散落(luo)呈螺(luo)旋行(xing)(xing)(xing)進(jin)(jin)式實現熱(re)交換(huan),物(wu)料移動(dong)至內層(ceng)(ceng)(ceng)(ceng)的(de)另一(yi)(yi)端(duan)進(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)逆流烘(hong)(hong)干(gan),物(wu)料在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不斷地被反復揚進(jin)(jin),呈進(jin)(jin)兩步(bu)退(tui)一(yi)(yi)步(bu)的(de)行(xing)(xing)(xing)進(jin)(jin)方式,物(wu)料在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸收(shou)內層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散發(fa)的(de)熱(re)量,又(you)吸收(shou)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)熱(re)量,同(tong)時又(you)延長了(le)干(gan)燥(zao)時間,物(wu)料在(zai)此達到干(gan)燥(zao)狀態。物(wu)料行(xing)(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另一(yi)(yi)端(duan)而(er)落(luo)入(ru)外層(ceng)(ceng)(ceng)(ceng),物(wu)料在(zai)外層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內呈矩(ju)(ju)形多回路方式行(xing)(xing)(xing)進(jin)(jin),達到干(gan)燥(zao)效果的(de)物(wu)料在(zai)熱(re)風(feng)作用(yong)下快(kuai)速(su)行(xing)(xing)(xing)進(jin)(jin)排(pai)出(chu)滾(gun)筒(tong),沒有達到干(gan)燥(zao)效果的(de)濕物(wu)料因(yin)自重而(er)不能(neng)快(kuai)速(su)行(xing)(xing)(xing)進(jin)(jin),物(wu)料在(zai)此矩(ju)(ju)形抄(chao)板內進(jin)(jin)行(xing)(xing)(xing)充分干(gan)燥(zao),由此達到干(gan)燥(zao)效果,完成干(gan)燥(zao)過程(cheng)。
設備特點
該設(she)備與(yu)其他干(gan)(gan)燥設(she)備相比,生產能(neng)力大,可(ke)連續(xu)操(cao)作; 結構簡單(dan),操(cao)作方便;故障少,維(wei)修費(fei)用(yong)低;適(shi)用(yong)范圍廣,流(liu)體阻力小,可(ke)以用(yong)它干(gan)(gan)燥顆料狀(zhuang)物(wu)料,對(dui)于那些附(fu)著性大的物(wu)料也很有利;操(cao)作彈性大,生產上(shang)允(yun)許產品的流(liu)量(liang)有較大波(bo)動(dong)范圍,不會影響產品的質量(liang);清掃容易(yi)。