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(shao)煤(mei)的發電廠(chang)將煤(mei)磨成(cheng)100微米以下的煤(mei)粉,用(yong)預(yu)熱空氣噴入爐膛(tang)經燃(ran)燒(shao)形成(cheng)懸浮狀態,產生混雜有大量不燃(ran)物(wu)的高溫煙(yan)氣,經集(ji)塵裝置(zhi)捕集(ji)就得到了粉煤(mei)灰。粉煤(mei)灰的化學組成(cheng)與粘土質相似,主要成(cheng)分為二氧(yang)化硅、三(san)氧(yang)化二鋁、三(san)氧(yang)化二鐵、氧(yang)化鈣和未(wei)燃(ran)盡碳。
工(gong)作(zuo)原理
濕粉(fen)煤(mei)灰由(you)供料(liao)(liao)(liao)裝置進(jin)入三(san)層(ceng)(ceng)(ceng)滾(gun)(gun)筒的(de)內(nei)層(ceng)(ceng)(ceng),實現(xian)順流烘(hong)干(gan)(gan), 粉(fen)煤(mei)灰在(zai)內(nei)層(ceng)(ceng)(ceng)的(de)抄(chao)(chao)板下不斷抄(chao)(chao)起、散(san)落(luo)呈(cheng)螺旋行(xing)(xing)(xing)(xing)進(jin)式實現(xian)熱(re)交換(huan),物(wu)(wu)(wu)料(liao)(liao)(liao)移動至(zhi)內(nei)層(ceng)(ceng)(ceng)的(de)另一端進(jin)入中(zhong)層(ceng)(ceng)(ceng),進(jin)行(xing)(xing)(xing)(xing)逆流烘(hong)干(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不斷地被反復揚進(jin),呈(cheng)進(jin)兩步(bu)退一步(bu)的(de)行(xing)(xing)(xing)(xing)進(jin)方(fang)(fang)式,物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既(ji)充分(fen)吸收(shou)內(nei)層(ceng)(ceng)(ceng)滾(gun)(gun)筒散(san)發的(de)熱(re)量(liang),又吸收(shou)中(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)筒的(de)熱(re)量(liang),同時(shi)又延(yan)長(chang)了(le)干(gan)(gan)燥(zao)時(shi)間,物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)此(ci)達(da)(da)到(dao)干(gan)(gan)燥(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)另一端而落(luo)入外層(ceng)(ceng)(ceng),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾(gun)(gun)筒內(nei)呈(cheng)矩形(xing)多回路方(fang)(fang)式行(xing)(xing)(xing)(xing)進(jin),達(da)(da)到(dao)干(gan)(gan)燥(zao)效果的(de)物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)熱(re)風作用下快(kuai)速(su)行(xing)(xing)(xing)(xing)進(jin)排出滾(gun)(gun)筒,沒有達(da)(da)到(dao)干(gan)(gan)燥(zao)效果的(de)濕物(wu)(wu)(wu)料(liao)(liao)(liao)因自重而不能快(kuai)速(su)行(xing)(xing)(xing)(xing)進(jin),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)此(ci)矩形(xing)抄(chao)(chao)板內(nei)進(jin)行(xing)(xing)(xing)(xing)充分(fen)干(gan)(gan)燥(zao),由(you)此(ci)達(da)(da)到(dao)干(gan)(gan)燥(zao)效果,完成干(gan)(gan)燥(zao)過程(cheng)。
設備特點(dian)
該(gai)設備與其(qi)他干燥設備相比,生產能力(li)大(da),可連(lian)續操(cao)作; 結構(gou)簡單,操(cao)作方便;故障(zhang)少,維(wei)修(xiu)費用(yong)(yong)低;適用(yong)(yong)范圍廣(guang),流(liu)體阻力(li)小,可以用(yong)(yong)它干燥顆料狀物料,對(dui)于那些附著性大(da)的物料也很有(you)利;操(cao)作彈性大(da),生產上允許產品的流(liu)量有(you)較大(da)波動范圍,不會(hui)影響產品的質(zhi)量;清掃容易。