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)燒煤(mei)(mei)的(de)(de)發電(dian)廠將煤(mei)(mei)磨成(cheng)(cheng)100微(wei)米以下的(de)(de)煤(mei)(mei)粉(fen)，用預熱空(kong)氣噴入爐膛經燃(ran)燒形成(cheng)(cheng)懸浮狀態，產(chan)生混雜有(you)大量不燃(ran)物的(de)(de)高(gao)溫煙氣，經集塵裝置捕(bu)集就(jiu)得(de)到了粉(fen)煤(mei)(mei)灰。粉(fen)煤(mei)(mei)灰的(de)(de)化學組成(cheng)(cheng)與粘土質相似，主要成(cheng)(cheng)分為二氧(yang)(yang)化硅、三(san)氧(yang)(yang)化二鋁、三(san)氧(yang)(yang)化二鐵、氧(yang)(yang)化鈣和(he)未(wei)燃(ran)盡碳(tan)。

工作原理

濕粉煤灰(hui)由供(gong)料(liao)(liao)(liao)裝置進(jin)入三層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng),實現順流烘干(gan), 粉煤灰(hui)在內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)抄板(ban)下(xia)不(bu)斷抄起、散落呈螺(luo)旋行(xing)進(jin)式實現熱交(jiao)換，物(wu)(wu)(wu)料(liao)(liao)(liao)移動(dong)至(zhi)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)另一(yi)端進(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)行(xing)逆(ni)流烘干(gan)，物(wu)(wu)(wu)料(liao)(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反復揚進(jin)，呈進(jin)兩步退(tui)一(yi)步的(de)(de)行(xing)進(jin)方式，物(wu)(wu)(wu)料(liao)(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既(ji)充分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散發的(de)(de)熱量，又吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)熱量，同時又延長了干(gan)燥(zao)(zao)(zao)時間，物(wu)(wu)(wu)料(liao)(liao)(liao)在此達到(dao)干(gan)燥(zao)(zao)(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另一(yi)端而落入外(wai)層(ceng)(ceng)(ceng)(ceng)，物(wu)(wu)(wu)料(liao)(liao)(liao)在外(wai)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)呈矩形多(duo)回路方式行(xing)進(jin)，達到(dao)干(gan)燥(zao)(zao)(zao)效(xiao)果(guo)的(de)(de)物(wu)(wu)(wu)料(liao)(liao)(liao)在熱風作(zuo)用下(xia)快速行(xing)進(jin)排出滾(gun)筒(tong)，沒有達到(dao)干(gan)燥(zao)(zao)(zao)效(xiao)果(guo)的(de)(de)濕物(wu)(wu)(wu)料(liao)(liao)(liao)因自重而不(bu)能快速行(xing)進(jin)，物(wu)(wu)(wu)料(liao)(liao)(liao)在此矩形抄板(ban)內(nei)進(jin)行(xing)充分干(gan)燥(zao)(zao)(zao)，由此達到(dao)干(gan)燥(zao)(zao)(zao)效(xiao)果(guo)，完成干(gan)燥(zao)(zao)(zao)過程(cheng)。

設備特(te)點(dian)

該設備與其(qi)他干(gan)燥設備相比，生產能力(li)大，可連續(xu)操作(zuo)； 結構簡(jian)單，操作(zuo)方便(bian)；故障少(shao)，維修費用低；適用范(fan)圍廣，流體阻力(li)小(xiao)，可以用它干(gan)燥顆(ke)料狀物料，對于(yu)那(nei)些附著(zhu)性大的物料也很有(you)利；操作(zuo)彈性大，生產上允許產品的流量(liang)有(you)較大波動(dong)范(fan)圍，不會影(ying)響產品的質量(liang)；清掃容易。