煤粉灰烘干(gan)機是煤粉經高溫(wen)燃燒后形成的一種似(si)火山灰質混合材料。
它(ta)是燃燒煤(mei)的(de)發電廠(chang)將煤(mei)磨(mo)成100微米以下(xia)的(de)煤(mei)粉(fen),用(yong)預熱空氣噴(pen)入爐(lu)膛經燃燒形成懸浮狀態,產生(sheng)混雜(za)有(you)大量不燃物(wu)的(de)高溫煙氣,經集(ji)塵裝置捕集(ji)就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)化(hua)(hua)(hua)學組成與粘土質相似,主要成分為(wei)二(er)氧化(hua)(hua)(hua)硅(gui)、三(san)氧化(hua)(hua)(hua)二(er)鋁、三(san)氧化(hua)(hua)(hua)二(er)鐵、氧化(hua)(hua)(hua)鈣和未燃盡碳。
工(gong)作(zuo)原(yuan)理(li)
濕粉(fen)煤灰由(you)供料(liao)(liao)裝置(zhi)進(jin)(jin)(jin)(jin)(jin)入(ru)三(san)層(ceng)滾(gun)筒(tong)(tong)的(de)內(nei)層(ceng),實(shi)現(xian)順流烘干(gan), 粉(fen)煤灰在(zai)(zai)(zai)內(nei)層(ceng)的(de)抄(chao)(chao)板(ban)下不斷(duan)(duan)抄(chao)(chao)起、散(san)落呈螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)式(shi)實(shi)現(xian)熱(re)交換(huan),物(wu)(wu)料(liao)(liao)移動至(zhi)內(nei)層(ceng)的(de)另一端進(jin)(jin)(jin)(jin)(jin)入(ru)中(zhong)(zhong)層(ceng),進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)逆(ni)流烘干(gan),物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)不斷(duan)(duan)地被反復(fu)揚(yang)進(jin)(jin)(jin)(jin)(jin),呈進(jin)(jin)(jin)(jin)(jin)兩步退一步的(de)行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)方式(shi),物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)中(zhong)(zhong)層(ceng)既(ji)充分吸(xi)收內(nei)層(ceng)滾(gun)筒(tong)(tong)散(san)發的(de)熱(re)量(liang),又吸(xi)收中(zhong)(zhong)層(ceng)滾(gun)筒(tong)(tong)的(de)熱(re)量(liang),同時(shi)又延(yan)長了干(gan)燥(zao)時(shi)間,物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)此(ci)達到(dao)干(gan)燥(zao)狀態。物(wu)(wu)料(liao)(liao)行(xing)(xing)至(zhi)中(zhong)(zhong)層(ceng)另一端而落入(ru)外(wai)層(ceng),物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)外(wai)層(ceng)滾(gun)筒(tong)(tong)內(nei)呈矩形多回路方式(shi)行(xing)(xing)進(jin)(jin)(jin)(jin)(jin),達到(dao)干(gan)燥(zao)效果的(de)物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)熱(re)風(feng)作用(yong)下快速行(xing)(xing)進(jin)(jin)(jin)(jin)(jin)排(pai)出滾(gun)筒(tong)(tong),沒有達到(dao)干(gan)燥(zao)效果的(de)濕物(wu)(wu)料(liao)(liao)因自重而不能快速行(xing)(xing)進(jin)(jin)(jin)(jin)(jin),物(wu)(wu)料(liao)(liao)在(zai)(zai)(zai)此(ci)矩形抄(chao)(chao)板(ban)內(nei)進(jin)(jin)(jin)(jin)(jin)行(xing)(xing)充分干(gan)燥(zao),由(you)此(ci)達到(dao)干(gan)燥(zao)效果,完成干(gan)燥(zao)過程。
設(she)備特(te)點
該(gai)設備(bei)與(yu)其他干燥設備(bei)相比,生產能力大,可連續操作; 結構簡單,操作方便;故(gu)障(zhang)少,維修費(fei)用(yong)低;適用(yong)范(fan)圍(wei)廣,流體阻力小,可以用(yong)它(ta)干燥顆料狀物料,對(dui)于那些附著性大的物料也很有利(li);操作彈性大,生產上允許產品的流量(liang)有較大波(bo)動范(fan)圍(wei),不會影響產品的質量(liang);清掃(sao)容易。