煤粉(fen)灰(hui)烘干機是煤粉(fen)經(jing)高(gao)溫燃燒(shao)后形成(cheng)的一種似火山灰(hui)質混合材料(liao)。
它是(shi)燃(ran)燒煤的(de)發(fa)電廠將煤磨成(cheng)(cheng)100微米以下的(de)煤粉,用(yong)預熱空氣(qi)噴(pen)入爐膛經(jing)燃(ran)燒形(xing)成(cheng)(cheng)懸(xuan)浮狀態,產生(sheng)混雜有大量不(bu)燃(ran)物的(de)高溫煙氣(qi),經(jing)集塵(chen)裝置捕集就得到了粉煤灰。粉煤灰的(de)化(hua)學組成(cheng)(cheng)與(yu)粘土質相似,主(zhu)要成(cheng)(cheng)分為二氧(yang)化(hua)硅、三(san)氧(yang)化(hua)二鋁、三(san)氧(yang)化(hua)二鐵、氧(yang)化(hua)鈣和未燃(ran)盡碳。
工作原理(li)
濕粉煤灰(hui)由(you)供料(liao)裝(zhuang)置進入三層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)內(nei)(nei)(nei)(nei)層(ceng)(ceng),實現順流烘(hong)(hong)干(gan), 粉煤灰(hui)在(zai)內(nei)(nei)(nei)(nei)層(ceng)(ceng)的(de)(de)抄(chao)板下不斷抄(chao)起(qi)、散落(luo)呈螺旋行(xing)(xing)(xing)(xing)進式(shi)(shi)實現熱交換,物(wu)(wu)料(liao)移動(dong)至內(nei)(nei)(nei)(nei)層(ceng)(ceng)的(de)(de)另一(yi)端(duan)(duan)進入中(zhong)層(ceng)(ceng),進行(xing)(xing)(xing)(xing)逆流烘(hong)(hong)干(gan),物(wu)(wu)料(liao)在(zai)中(zhong)層(ceng)(ceng)不斷地被反復(fu)揚進,呈進兩步退一(yi)步的(de)(de)行(xing)(xing)(xing)(xing)進方(fang)式(shi)(shi),物(wu)(wu)料(liao)在(zai)中(zhong)層(ceng)(ceng)既(ji)充分吸收內(nei)(nei)(nei)(nei)層(ceng)(ceng)滾(gun)筒(tong)(tong)散發的(de)(de)熱量(liang),又吸收中(zhong)層(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)熱量(liang),同時(shi)(shi)又延長了(le)干(gan)燥(zao)時(shi)(shi)間,物(wu)(wu)料(liao)在(zai)此達(da)到干(gan)燥(zao)狀態(tai)。物(wu)(wu)料(liao)行(xing)(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)另一(yi)端(duan)(duan)而落(luo)入外層(ceng)(ceng),物(wu)(wu)料(liao)在(zai)外層(ceng)(ceng)滾(gun)筒(tong)(tong)內(nei)(nei)(nei)(nei)呈矩形多回路方(fang)式(shi)(shi)行(xing)(xing)(xing)(xing)進,達(da)到干(gan)燥(zao)效果(guo)的(de)(de)物(wu)(wu)料(liao)在(zai)熱風作用(yong)下快速行(xing)(xing)(xing)(xing)進排出滾(gun)筒(tong)(tong),沒有(you)達(da)到干(gan)燥(zao)效果(guo)的(de)(de)濕物(wu)(wu)料(liao)因(yin)自重而不能快速行(xing)(xing)(xing)(xing)進,物(wu)(wu)料(liao)在(zai)此矩形抄(chao)板內(nei)(nei)(nei)(nei)進行(xing)(xing)(xing)(xing)充分干(gan)燥(zao),由(you)此達(da)到干(gan)燥(zao)效果(guo),完成(cheng)干(gan)燥(zao)過程。
設(she)備特點
該設備與其他干(gan)燥設備相比,生產能(neng)力大,可連續操作; 結構(gou)簡單,操作方便;故(gu)障少,維修(xiu)費用(yong)低;適用(yong)范(fan)圍廣,流(liu)體(ti)阻力小,可以用(yong)它干(gan)燥顆料狀(zhuang)物料,對(dui)于那些附(fu)著性大的物料也很(hen)有(you)利(li);操作彈性大,生產上允許產品(pin)的流(liu)量(liang)(liang)有(you)較大波動范(fan)圍,不(bu)會(hui)影(ying)響產品(pin)的質量(liang)(liang);清掃(sao)容易。