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。
它是燃燒煤的(de)發電廠將煤磨成(cheng)100微(wei)(wei)米以(yi)下的(de)煤粉(fen),用(yong)預熱空氣噴入爐膛經燃燒形成(cheng)懸浮狀態,產生混雜有大(da)量不燃物的(de)高溫(wen)煙氣,經集(ji)塵裝置捕集(ji)就得到了粉(fen)煤灰。粉(fen)煤灰的(de)化學(xue)組成(cheng)與粘土質相似,主要成(cheng)分為二(er)氧化硅(gui)、三氧化二(er)鋁、三氧化二(er)鐵、氧化鈣和未燃盡碳(tan)。
工作(zuo)原理
濕粉煤(mei)灰(hui)(hui)由供料(liao)(liao)裝置(zhi)進(jin)入(ru)三層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)內(nei)層(ceng)(ceng)(ceng),實現順流烘干(gan)(gan), 粉煤(mei)灰(hui)(hui)在(zai)內(nei)層(ceng)(ceng)(ceng)的(de)抄(chao)板(ban)(ban)下不斷(duan)抄(chao)起、散落(luo)呈螺旋行(xing)(xing)(xing)(xing)進(jin)式實現熱交(jiao)換,物(wu)(wu)(wu)料(liao)(liao)移(yi)動至內(nei)層(ceng)(ceng)(ceng)的(de)另(ling)一(yi)(yi)端進(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng),進(jin)行(xing)(xing)(xing)(xing)逆流烘干(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)不斷(duan)地(di)被反復揚(yang)進(jin),呈進(jin)兩步退一(yi)(yi)步的(de)行(xing)(xing)(xing)(xing)進(jin)方式,物(wu)(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)散發的(de)熱量(liang),又吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)熱量(liang),同時又延長了干(gan)(gan)燥時間,物(wu)(wu)(wu)料(liao)(liao)在(zai)此達(da)到干(gan)(gan)燥狀態。物(wu)(wu)(wu)料(liao)(liao)行(xing)(xing)(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)另(ling)一(yi)(yi)端而落(luo)入(ru)外層(ceng)(ceng)(ceng),物(wu)(wu)(wu)料(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)內(nei)呈矩(ju)形(xing)多回路方式行(xing)(xing)(xing)(xing)進(jin),達(da)到干(gan)(gan)燥效果的(de)物(wu)(wu)(wu)料(liao)(liao)在(zai)熱風作用下快速(su)行(xing)(xing)(xing)(xing)進(jin)排出滾(gun)筒(tong)(tong),沒有達(da)到干(gan)(gan)燥效果的(de)濕物(wu)(wu)(wu)料(liao)(liao)因自重而不能快速(su)行(xing)(xing)(xing)(xing)進(jin),物(wu)(wu)(wu)料(liao)(liao)在(zai)此矩(ju)形(xing)抄(chao)板(ban)(ban)內(nei)進(jin)行(xing)(xing)(xing)(xing)充分干(gan)(gan)燥,由此達(da)到干(gan)(gan)燥效果,完(wan)成干(gan)(gan)燥過程(cheng)。
設(she)備特點
該設備與其他干(gan)燥設備相比,生產能力大(da),可連續操(cao)作; 結構(gou)簡單(dan),操(cao)作方便;故(gu)障少,維修費用(yong)(yong)低;適用(yong)(yong)范圍廣,流體阻(zu)力小,可以(yi)用(yong)(yong)它干(gan)燥顆(ke)料狀物料,對于那(nei)些附著性大(da)的(de)物料也(ye)很有(you)利;操(cao)作彈性大(da),生產上允(yun)許(xu)產品的(de)流量有(you)較大(da)波動范圍,不會影響產品的(de)質量;清掃容(rong)易。