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)燒煤的發電(dian)廠將煤磨成(cheng)100微米(mi)以(yi)下的煤粉(fen),用預熱空氣噴入爐膛經(jing)燃(ran)燒形(xing)成(cheng)懸浮狀態,產(chan)生(sheng)混雜有大量不燃(ran)物的高溫煙氣,經(jing)集(ji)塵裝置捕(bu)集(ji)就得到(dao)了粉(fen)煤灰(hui)。粉(fen)煤灰(hui)的化(hua)學組成(cheng)與粘土質相似,主(zhu)要成(cheng)分(fen)為二氧(yang)(yang)化(hua)硅、三(san)氧(yang)(yang)化(hua)二鋁、三(san)氧(yang)(yang)化(hua)二鐵、氧(yang)(yang)化(hua)鈣和未燃(ran)盡碳。
工(gong)作原理
濕(shi)粉煤(mei)灰由供料(liao)(liao)(liao)(liao)(liao)裝置進(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng),實現(xian)順(shun)流(liu)(liu)烘(hong)干(gan), 粉煤(mei)灰在(zai)(zai)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的抄(chao)板下不斷(duan)抄(chao)起、散落呈螺旋行(xing)(xing)進(jin)(jin)式(shi)(shi)實現(xian)熱(re)(re)交(jiao)換,物料(liao)(liao)(liao)(liao)(liao)移動至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的另一(yi)端(duan)進(jin)(jin)入中層(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)逆流(liu)(liu)烘(hong)干(gan),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin),呈進(jin)(jin)兩步退一(yi)步的行(xing)(xing)進(jin)(jin)方(fang)式(shi)(shi),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)既(ji)充分吸收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發的熱(re)(re)量,又吸收中層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的熱(re)(re)量,同時又延長了干(gan)燥時間,物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)達到干(gan)燥狀態。物料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)至中層(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端(duan)而落入外層(ceng)(ceng)(ceng)(ceng)(ceng),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)(nei)呈矩形(xing)多(duo)回路(lu)方(fang)式(shi)(shi)行(xing)(xing)進(jin)(jin),達到干(gan)燥效果的物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)熱(re)(re)風作(zuo)用(yong)下快速行(xing)(xing)進(jin)(jin)排出滾筒(tong),沒有(you)達到干(gan)燥效果的濕(shi)物料(liao)(liao)(liao)(liao)(liao)因自重而不能快速行(xing)(xing)進(jin)(jin),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)矩形(xing)抄(chao)板內(nei)(nei)進(jin)(jin)行(xing)(xing)充分干(gan)燥,由此(ci)達到干(gan)燥效果,完成(cheng)干(gan)燥過程。
設備特點
該設備與其他干(gan)燥設備相比,生產能力大(da)(da),可連續操作(zuo); 結構簡單,操作(zuo)方便;故障少(shao),維修費(fei)用低;適用范圍(wei)廣,流(liu)體阻力小(xiao),可以用它干(gan)燥顆(ke)料狀物料,對于(yu)那些附著性大(da)(da)的(de)物料也(ye)很(hen)有(you)利;操作(zuo)彈性大(da)(da),生產上(shang)允(yun)許產品的(de)流(liu)量(liang)有(you)較大(da)(da)波動范圍(wei),不會影(ying)響產品的(de)質量(liang);清掃容易。