煤粉灰烘干機是煤粉經高溫燃燒(shao)后形(xing)成的一(yi)種(zhong)似火山灰質混(hun)合材料。
它是燃燒煤的發(fa)電廠將煤磨成(cheng)100微米(mi)以下(xia)的煤粉(fen)(fen),用預熱空氣(qi)噴入爐膛經燃燒形成(cheng)懸(xuan)浮狀態(tai),產生混雜有大量不燃物的高溫煙(yan)氣(qi),經集塵裝置捕(bu)集就(jiu)得到了粉(fen)(fen)煤灰。粉(fen)(fen)煤灰的化(hua)學組成(cheng)與粘土質相似,主(zhu)要成(cheng)分(fen)為二氧(yang)(yang)化(hua)硅、三氧(yang)(yang)化(hua)二鋁、三氧(yang)(yang)化(hua)二鐵、氧(yang)(yang)化(hua)鈣和未燃盡碳。
工作原理
濕粉煤(mei)灰(hui)由供料(liao)裝置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng),實現順流(liu)烘干, 粉煤(mei)灰(hui)在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)抄板下(xia)(xia)不斷(duan)抄起、散落呈螺旋行(xing)進(jin)(jin)式(shi)實現熱交換,物(wu)(wu)料(liao)移動至(zhi)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)另一端進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)行(xing)逆流(liu)烘干,物(wu)(wu)料(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不斷(duan)地被(bei)反(fan)復(fu)揚進(jin)(jin),呈進(jin)(jin)兩(liang)步退一步的(de)(de)(de)行(xing)進(jin)(jin)方(fang)式(shi),物(wu)(wu)料(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既充(chong)分吸收(shou)內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)散發的(de)(de)(de)熱量,又吸收(shou)中(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)(de)(de)熱量,同時又延長(chang)了干燥(zao)時間,物(wu)(wu)料(liao)在(zai)此達到干燥(zao)狀態。物(wu)(wu)料(liao)行(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)另一端而落入(ru)外(wai)層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)在(zai)外(wai)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)內(nei)(nei)呈矩形多(duo)回路方(fang)式(shi)行(xing)進(jin)(jin),達到干燥(zao)效果的(de)(de)(de)物(wu)(wu)料(liao)在(zai)熱風作(zuo)用下(xia)(xia)快(kuai)速行(xing)進(jin)(jin)排出滾(gun)(gun)筒(tong)(tong),沒(mei)有達到干燥(zao)效果的(de)(de)(de)濕物(wu)(wu)料(liao)因自重(zhong)而不能快(kuai)速行(xing)進(jin)(jin),物(wu)(wu)料(liao)在(zai)此矩形抄板內(nei)(nei)進(jin)(jin)行(xing)充(chong)分干燥(zao),由此達到干燥(zao)效果,完成干燥(zao)過程(cheng)。
設備特點
該設(she)備與其他干(gan)燥(zao)設(she)備相比(bi),生產能力(li)大,可(ke)連(lian)續(xu)操(cao)作(zuo); 結(jie)構簡單,操(cao)作(zuo)方便(bian);故障少,維修費(fei)用(yong)低;適(shi)用(yong)范圍廣,流(liu)體阻力(li)小,可(ke)以用(yong)它(ta)干(gan)燥(zao)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(zuo)彈(dan)性大,生產上(shang)允許產品(pin)的流(liu)量有較大波動范圍,不會影響產品(pin)的質量;清掃(sao)容易(yi)。