煤粉灰烘干機是煤粉經高溫(wen)燃燒后(hou)形成的一種似火(huo)山灰質(zhi)混合材料。
它是燃(ran)(ran)(ran)燒煤的發電廠將煤磨成(cheng)100微米(mi)以下(xia)的煤粉(fen),用(yong)預熱(re)空(kong)氣噴入爐膛經燃(ran)(ran)(ran)燒形成(cheng)懸浮狀態(tai),產生混(hun)雜有大量不燃(ran)(ran)(ran)物的高溫煙氣,經集塵裝置捕(bu)集就得到了粉(fen)煤灰。粉(fen)煤灰的化(hua)學組成(cheng)與粘土質相似,主要成(cheng)分為(wei)二(er)(er)氧(yang)化(hua)硅、三(san)(san)氧(yang)化(hua)二(er)(er)鋁(lv)、三(san)(san)氧(yang)化(hua)二(er)(er)鐵、氧(yang)化(hua)鈣和(he)未燃(ran)(ran)(ran)盡(jin)碳。
工作原理
濕粉煤(mei)灰(hui)由供(gong)料(liao)(liao)裝置進(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng),實(shi)現順流烘(hong)干(gan)(gan), 粉煤(mei)灰(hui)在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)抄(chao)(chao)板下不(bu)斷抄(chao)(chao)起、散(san)落呈螺旋行(xing)(xing)進(jin)(jin)(jin)式實(shi)現熱交換,物(wu)(wu)(wu)(wu)料(liao)(liao)移動至內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)(de)另(ling)一(yi)端(duan)進(jin)(jin)(jin)入中層(ceng)(ceng)(ceng),進(jin)(jin)(jin)行(xing)(xing)逆流烘(hong)干(gan)(gan),物(wu)(wu)(wu)(wu)料(liao)(liao)在(zai)中層(ceng)(ceng)(ceng)不(bu)斷地被反(fan)復(fu)揚進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩步(bu)(bu)退一(yi)步(bu)(bu)的(de)(de)(de)行(xing)(xing)進(jin)(jin)(jin)方(fang)式,物(wu)(wu)(wu)(wu)料(liao)(liao)在(zai)中層(ceng)(ceng)(ceng)既充(chong)分(fen)吸(xi)收(shou)(shou)內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)散(san)發(fa)的(de)(de)(de)熱量,又吸(xi)收(shou)(shou)中層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)(de)熱量,同時又延長(chang)了干(gan)(gan)燥(zao)時間,物(wu)(wu)(wu)(wu)料(liao)(liao)在(zai)此達(da)到干(gan)(gan)燥(zao)狀態。物(wu)(wu)(wu)(wu)料(liao)(liao)行(xing)(xing)至中層(ceng)(ceng)(ceng)另(ling)一(yi)端(duan)而落入外層(ceng)(ceng)(ceng),物(wu)(wu)(wu)(wu)料(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)(nei)呈矩形多(duo)回路方(fang)式行(xing)(xing)進(jin)(jin)(jin),達(da)到干(gan)(gan)燥(zao)效果的(de)(de)(de)物(wu)(wu)(wu)(wu)料(liao)(liao)在(zai)熱風作用下快速(su)行(xing)(xing)進(jin)(jin)(jin)排出滾(gun)筒(tong),沒有達(da)到干(gan)(gan)燥(zao)效果的(de)(de)(de)濕物(wu)(wu)(wu)(wu)料(liao)(liao)因(yin)自重而不(bu)能快速(su)行(xing)(xing)進(jin)(jin)(jin),物(wu)(wu)(wu)(wu)料(liao)(liao)在(zai)此矩形抄(chao)(chao)板內(nei)(nei)進(jin)(jin)(jin)行(xing)(xing)充(chong)分(fen)干(gan)(gan)燥(zao),由此達(da)到干(gan)(gan)燥(zao)效果,完成干(gan)(gan)燥(zao)過(guo)程。
設備特(te)點(dian)
該設(she)備與其他干燥設(she)備相比(bi),生(sheng)產(chan)能力大(da)(da),可連續操(cao)作(zuo); 結構簡(jian)單(dan),操(cao)作(zuo)方便(bian);故(gu)障少,維(wei)修費(fei)用(yong)(yong)低;適用(yong)(yong)范圍廣,流體阻(zu)力小(xiao),可以(yi)用(yong)(yong)它干燥顆(ke)料(liao)狀物(wu)料(liao),對于那(nei)些附(fu)著性大(da)(da)的物(wu)料(liao)也很有(you)(you)利;操(cao)作(zuo)彈性大(da)(da),生(sheng)產(chan)上允許(xu)產(chan)品(pin)的流量有(you)(you)較大(da)(da)波動范圍,不會影響產(chan)品(pin)的質量;清掃容易。