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(shao)煤的(de)(de)發(fa)電廠將(jiang)煤磨成100微米以(yi)下的(de)(de)煤粉(fen),用(yong)預熱空氣噴(pen)入(ru)爐膛經燃燒(shao)形成懸浮狀態,產生混雜有大量不(bu)燃物的(de)(de)高溫(wen)煙氣,經集塵(chen)裝置捕集就得到了粉(fen)煤灰。粉(fen)煤灰的(de)(de)化(hua)學組成與粘土質相似,主要(yao)成分為二氧化(hua)硅、三(san)(san)氧化(hua)二鋁、三(san)(san)氧化(hua)二鐵、氧化(hua)鈣和未燃盡碳(tan)。
工作原(yuan)理
濕粉煤灰由(you)供料(liao)(liao)(liao)(liao)裝置進入三層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)內(nei)(nei)(nei)層(ceng)(ceng),實(shi)現順(shun)流(liu)烘干(gan)(gan)(gan), 粉煤灰在(zai)內(nei)(nei)(nei)層(ceng)(ceng)的(de)抄(chao)板(ban)下(xia)不(bu)斷抄(chao)起、散落呈螺(luo)旋行(xing)(xing)進式(shi)實(shi)現熱(re)(re)交換,物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)移(yi)動(dong)至(zhi)內(nei)(nei)(nei)層(ceng)(ceng)的(de)另一(yi)端(duan)(duan)進入中(zhong)(zhong)層(ceng)(ceng),進行(xing)(xing)逆(ni)流(liu)烘干(gan)(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)不(bu)斷地(di)被反復揚(yang)進,呈進兩步(bu)退一(yi)步(bu)的(de)行(xing)(xing)進方式(shi),物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)既充分(fen)吸(xi)收(shou)內(nei)(nei)(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)散發的(de)熱(re)(re)量,又吸(xi)收(shou)中(zhong)(zhong)層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)熱(re)(re)量,同(tong)時又延長了(le)干(gan)(gan)(gan)燥(zao)(zao)時間,物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此達到干(gan)(gan)(gan)燥(zao)(zao)狀態(tai)。物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)行(xing)(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)另一(yi)端(duan)(duan)而(er)落入外(wai)層(ceng)(ceng),物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)外(wai)層(ceng)(ceng)滾(gun)筒(tong)(tong)內(nei)(nei)(nei)呈矩形多回路方式(shi)行(xing)(xing)進,達到干(gan)(gan)(gan)燥(zao)(zao)效果的(de)物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)熱(re)(re)風作用(yong)下(xia)快(kuai)速行(xing)(xing)進排出滾(gun)筒(tong)(tong),沒有(you)達到干(gan)(gan)(gan)燥(zao)(zao)效果的(de)濕物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)因(yin)自重而(er)不(bu)能快(kuai)速行(xing)(xing)進,物(wu)(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此矩形抄(chao)板(ban)內(nei)(nei)(nei)進行(xing)(xing)充分(fen)干(gan)(gan)(gan)燥(zao)(zao),由(you)此達到干(gan)(gan)(gan)燥(zao)(zao)效果,完成干(gan)(gan)(gan)燥(zao)(zao)過(guo)程。
設(she)備特(te)點
該(gai)設備與其他干燥設備相比,生(sheng)產(chan)能力大,可連續(xu)操作(zuo); 結構簡單(dan),操作(zuo)方便;故障(zhang)少,維修費用(yong)低;適(shi)用(yong)范圍(wei)廣(guang),流體阻力小,可以用(yong)它干燥顆(ke)料狀物(wu)料,對于那(nei)些附著性大的物(wu)料也很有利;操作(zuo)彈性大,生(sheng)產(chan)上允許產(chan)品的流量有較大波動范圍(wei),不(bu)會影響(xiang)產(chan)品的質量;清掃(sao)容易。