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(shi)燃燒煤的(de)(de)發電廠將煤磨成(cheng)100微米(mi)以下的(de)(de)煤粉(fen),用預熱空(kong)氣噴(pen)入爐膛(tang)經(jing)燃燒形成(cheng)懸浮(fu)狀態,產生混雜有(you)大量(liang)不燃物的(de)(de)高溫煙氣,經(jing)集塵裝(zhuang)置(zhi)捕集就得(de)到了(le)粉(fen)煤灰。粉(fen)煤灰的(de)(de)化學組成(cheng)與粘土質相似(si),主(zhu)要(yao)成(cheng)分為二(er)氧化硅(gui)、三氧化二(er)鋁、三氧化二(er)鐵、氧化鈣和(he)未(wei)燃盡碳。
工作原理
濕粉煤(mei)灰(hui)由(you)供料(liao)(liao)裝置進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)內(nei)(nei)層(ceng)(ceng),實現順流烘干(gan)(gan)(gan), 粉煤(mei)灰(hui)在內(nei)(nei)層(ceng)(ceng)的(de)抄板下不斷(duan)抄起、散(san)落呈(cheng)螺(luo)旋(xuan)行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)式實現熱(re)(re)交(jiao)換,物(wu)(wu)(wu)料(liao)(liao)移動至內(nei)(nei)層(ceng)(ceng)的(de)另一(yi)端進(jin)(jin)(jin)(jin)入中(zhong)層(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)逆流烘干(gan)(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)在中(zhong)層(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)(jin)兩步(bu)退一(yi)步(bu)的(de)行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)方式,物(wu)(wu)(wu)料(liao)(liao)在中(zhong)層(ceng)(ceng)既充分(fen)吸(xi)收內(nei)(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)散(san)發的(de)熱(re)(re)量,又吸(xi)收中(zhong)層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)熱(re)(re)量,同時又延長了干(gan)(gan)(gan)燥(zao)時間,物(wu)(wu)(wu)料(liao)(liao)在此達(da)(da)到(dao)干(gan)(gan)(gan)燥(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)行(xing)(xing)(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)另一(yi)端而落入外(wai)層(ceng)(ceng),物(wu)(wu)(wu)料(liao)(liao)在外(wai)層(ceng)(ceng)滾(gun)筒(tong)(tong)內(nei)(nei)呈(cheng)矩(ju)形(xing)多回路方式行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin),達(da)(da)到(dao)干(gan)(gan)(gan)燥(zao)效(xiao)果(guo)(guo)的(de)物(wu)(wu)(wu)料(liao)(liao)在熱(re)(re)風作用(yong)下快(kuai)速行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)排出(chu)滾(gun)筒(tong)(tong),沒有達(da)(da)到(dao)干(gan)(gan)(gan)燥(zao)效(xiao)果(guo)(guo)的(de)濕物(wu)(wu)(wu)料(liao)(liao)因自(zi)重而不能快(kuai)速行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)(wu)料(liao)(liao)在此矩(ju)形(xing)抄板內(nei)(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)充分(fen)干(gan)(gan)(gan)燥(zao),由(you)此達(da)(da)到(dao)干(gan)(gan)(gan)燥(zao)效(xiao)果(guo)(guo),完成干(gan)(gan)(gan)燥(zao)過程。
設備特點
該設(she)(she)備與(yu)其(qi)他干(gan)燥(zao)設(she)(she)備相比,生產(chan)能力(li)大(da)(da)(da)(da),可連續(xu)操作; 結構簡單,操作方便;故障少(shao),維修費用低;適用范(fan)圍廣,流體阻力(li)小,可以(yi)用它干(gan)燥(zao)顆料狀物料,對于那些附(fu)著性大(da)(da)(da)(da)的(de)物料也很有(you)利;操作彈性大(da)(da)(da)(da),生產(chan)上允(yun)許產(chan)品的(de)流量有(you)較大(da)(da)(da)(da)波(bo)動范(fan)圍,不會影響產(chan)品的(de)質量;清掃容易。