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)(ran)(ran)(ran)燒煤(mei)(mei)的發電廠將(jiang)煤(mei)(mei)磨成100微米(mi)以下(xia)的煤(mei)(mei)粉,用預熱空氣噴入(ru)爐膛經燃(ran)(ran)(ran)(ran)燒形成懸浮狀態(tai),產生混(hun)雜有大量不燃(ran)(ran)(ran)(ran)物的高溫煙(yan)氣,經集塵裝置捕集就(jiu)得到了粉煤(mei)(mei)灰。粉煤(mei)(mei)灰的化學組成與(yu)粘(zhan)土質相(xiang)似,主要成分為(wei)二氧化硅、三氧化二鋁、三氧化二鐵、氧化鈣和(he)未燃(ran)(ran)(ran)(ran)盡(jin)碳。
工作原理(li)
濕粉(fen)煤灰由(you)供料(liao)裝(zhuang)置進(jin)(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾筒(tong)的(de)內(nei)層(ceng)(ceng)(ceng),實現順流烘干(gan), 粉(fen)煤灰在(zai)(zai)(zai)內(nei)層(ceng)(ceng)(ceng)的(de)抄(chao)(chao)板下不斷抄(chao)(chao)起、散(san)落呈螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)式(shi)實現熱(re)交換,物(wu)(wu)料(liao)移動(dong)至內(nei)層(ceng)(ceng)(ceng)的(de)另一端進(jin)(jin)(jin)(jin)入(ru)中層(ceng)(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)逆流烘干(gan),物(wu)(wu)料(liao)在(zai)(zai)(zai)中層(ceng)(ceng)(ceng)不斷地(di)被反復(fu)揚進(jin)(jin)(jin)(jin),呈進(jin)(jin)(jin)(jin)兩步(bu)退一步(bu)的(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方(fang)(fang)式(shi),物(wu)(wu)料(liao)在(zai)(zai)(zai)中層(ceng)(ceng)(ceng)既(ji)充(chong)分吸收內(nei)層(ceng)(ceng)(ceng)滾筒(tong)散(san)發的(de)熱(re)量,又吸收中層(ceng)(ceng)(ceng)滾筒(tong)的(de)熱(re)量,同時(shi)又延長了干(gan)燥(zao)時(shi)間,物(wu)(wu)料(liao)在(zai)(zai)(zai)此達到(dao)(dao)(dao)干(gan)燥(zao)狀態。物(wu)(wu)料(liao)行(xing)(xing)至中層(ceng)(ceng)(ceng)另一端而(er)落入(ru)外(wai)層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)在(zai)(zai)(zai)外(wai)層(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈矩(ju)形(xing)多回路方(fang)(fang)式(shi)行(xing)(xing)進(jin)(jin)(jin)(jin),達到(dao)(dao)(dao)干(gan)燥(zao)效果的(de)物(wu)(wu)料(liao)在(zai)(zai)(zai)熱(re)風作用(yong)下快(kuai)速(su)行(xing)(xing)進(jin)(jin)(jin)(jin)排出(chu)滾筒(tong),沒有達到(dao)(dao)(dao)干(gan)燥(zao)效果的(de)濕物(wu)(wu)料(liao)因自重而(er)不能快(kuai)速(su)行(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)料(liao)在(zai)(zai)(zai)此矩(ju)形(xing)抄(chao)(chao)板內(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充(chong)分干(gan)燥(zao),由(you)此達到(dao)(dao)(dao)干(gan)燥(zao)效果,完成(cheng)干(gan)燥(zao)過程。
設備特點
該設(she)備與(yu)其他(ta)干燥設(she)備相(xiang)比,生產能(neng)力大(da),可(ke)連續操(cao)作; 結構簡(jian)單,操(cao)作方(fang)便(bian);故障(zhang)少(shao),維修費用低;適用范(fan)圍廣(guang),流體阻力小(xiao),可(ke)以用它干燥顆料狀物料,對于那些附著性(xing)大(da)的物料也(ye)很有利;操(cao)作彈(dan)性(xing)大(da),生產上允許產品的流量有較大(da)波動范(fan)圍,不會(hui)影(ying)響產品的質量;清掃容易。