煤(mei)粉(fen)灰烘干機是煤(mei)粉(fen)經高溫(wen)燃(ran)燒后形(xing)成(cheng)的一種似火山灰質混合材料(liao)。
它是燃(ran)燒煤(mei)的發電廠將煤(mei)磨成(cheng)100微(wei)米(mi)以下的煤(mei)粉,用預熱空氣噴入爐膛經燃(ran)燒形成(cheng)懸浮狀態,產生混雜有(you)大量不燃(ran)物(wu)的高(gao)溫煙氣,經集(ji)塵裝置(zhi)捕集(ji)就得到(dao)了粉煤(mei)灰。粉煤(mei)灰的化(hua)學組成(cheng)與粘土質相似,主要(yao)成(cheng)分為二氧化(hua)硅、三氧化(hua)二鋁、三氧化(hua)二鐵、氧化(hua)鈣和未燃(ran)盡碳。
工作原理(li)
濕粉煤灰由供料(liao)(liao)(liao)裝置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾(gun)筒(tong)的內(nei)(nei)層(ceng)(ceng)(ceng),實現順流(liu)(liu)烘(hong)干(gan), 粉煤灰在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)的抄板下(xia)不斷(duan)抄起、散(san)落呈螺(luo)旋行進(jin)(jin)式實現熱(re)交(jiao)換,物(wu)(wu)料(liao)(liao)(liao)移動至內(nei)(nei)層(ceng)(ceng)(ceng)的另(ling)(ling)一端進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)行逆流(liu)(liu)烘(hong)干(gan),物(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin),呈進(jin)(jin)兩步退一步的行進(jin)(jin)方(fang)式,物(wu)(wu)料(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既充分吸收(shou)內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)散(san)發的熱(re)量,又吸收(shou)中(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)的熱(re)量,同時(shi)又延長了干(gan)燥(zao)(zao)時(shi)間,物(wu)(wu)料(liao)(liao)(liao)在(zai)此(ci)達(da)到干(gan)燥(zao)(zao)狀態。物(wu)(wu)料(liao)(liao)(liao)行至中(zhong)層(ceng)(ceng)(ceng)另(ling)(ling)一端而落入(ru)外層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)(nei)呈矩形多(duo)回(hui)路方(fang)式行進(jin)(jin),達(da)到干(gan)燥(zao)(zao)效果(guo)(guo)的物(wu)(wu)料(liao)(liao)(liao)在(zai)熱(re)風作用下(xia)快(kuai)速(su)(su)行進(jin)(jin)排出滾(gun)筒(tong),沒有達(da)到干(gan)燥(zao)(zao)效果(guo)(guo)的濕物(wu)(wu)料(liao)(liao)(liao)因(yin)自重而不能快(kuai)速(su)(su)行進(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)在(zai)此(ci)矩形抄板內(nei)(nei)進(jin)(jin)行充分干(gan)燥(zao)(zao),由此(ci)達(da)到干(gan)燥(zao)(zao)效果(guo)(guo),完成干(gan)燥(zao)(zao)過(guo)程。
設備(bei)特(te)點
該設備(bei)(bei)與其他干燥設備(bei)(bei)相比(bi),生(sheng)產(chan)能(neng)力大(da),可連續(xu)操(cao)作; 結構簡單,操(cao)作方(fang)便;故(gu)障少,維修費用(yong)(yong)低(di);適用(yong)(yong)范圍(wei)廣,流體(ti)阻力小,可以用(yong)(yong)它(ta)干燥顆料狀物(wu)料,對于那些(xie)附著性(xing)大(da)的物(wu)料也很(hen)有利(li);操(cao)作彈性(xing)大(da),生(sheng)產(chan)上允許產(chan)品的流量有較大(da)波動范圍(wei),不(bu)會影響產(chan)品的質量;清掃容易。