煤粉灰烘干機(ji)是(shi)煤粉經高溫燃燒后(hou)形成的一種似火山灰質混合材(cai)料(liao)。
它(ta)是燃(ran)燒(shao)煤(mei)的(de)發電(dian)廠將煤(mei)磨成(cheng)(cheng)100微米以下(xia)的(de)煤(mei)粉(fen),用(yong)預熱空(kong)氣噴入爐膛(tang)經燃(ran)燒(shao)形成(cheng)(cheng)懸(xuan)浮狀(zhuang)態,產生混(hun)雜有大量不燃(ran)物的(de)高(gao)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)學組成(cheng)(cheng)與粘土質相(xiang)似,主要成(cheng)(cheng)分為二氧(yang)(yang)(yang)化(hua)(hua)硅、三氧(yang)(yang)(yang)化(hua)(hua)二鋁、三氧(yang)(yang)(yang)化(hua)(hua)二鐵、氧(yang)(yang)(yang)化(hua)(hua)鈣和未燃(ran)盡碳。
工作原(yuan)理
濕(shi)粉煤灰由供料裝(zhuang)置進(jin)入三層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)內層(ceng)(ceng)(ceng),實現順流(liu)烘(hong)干(gan)(gan)(gan), 粉煤灰在(zai)(zai)內層(ceng)(ceng)(ceng)的(de)抄板下不(bu)斷抄起(qi)、散落(luo)呈螺旋行(xing)進(jin)式實現熱(re)交換(huan),物(wu)(wu)(wu)料移動至內層(ceng)(ceng)(ceng)的(de)另(ling)(ling)一端進(jin)入中(zhong)層(ceng)(ceng)(ceng),進(jin)行(xing)逆流(liu)烘(hong)干(gan)(gan)(gan),物(wu)(wu)(wu)料在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)不(bu)斷地被反復(fu)揚進(jin),呈進(jin)兩步退一步的(de)行(xing)進(jin)方式,物(wu)(wu)(wu)料在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)既充分吸收內層(ceng)(ceng)(ceng)滾(gun)筒(tong)散發的(de)熱(re)量(liang),又吸收中(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)熱(re)量(liang),同時又延長(chang)了(le)干(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)時間,物(wu)(wu)(wu)料在(zai)(zai)此達到干(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)狀態(tai)。物(wu)(wu)(wu)料行(xing)至中(zhong)層(ceng)(ceng)(ceng)另(ling)(ling)一端而落(luo)入外(wai)層(ceng)(ceng)(ceng),物(wu)(wu)(wu)料在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)滾(gun)筒(tong)內呈矩形多回(hui)路方式行(xing)進(jin),達到干(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)效(xiao)果(guo)(guo)的(de)物(wu)(wu)(wu)料在(zai)(zai)熱(re)風作(zuo)用下快速(su)行(xing)進(jin)排(pai)出滾(gun)筒(tong),沒有達到干(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)效(xiao)果(guo)(guo)的(de)濕(shi)物(wu)(wu)(wu)料因自(zi)重(zhong)而不(bu)能快速(su)行(xing)進(jin),物(wu)(wu)(wu)料在(zai)(zai)此矩形抄板內進(jin)行(xing)充分干(gan)(gan)(gan)燥(zao)(zao)(zao)(zao),由此達到干(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)效(xiao)果(guo)(guo),完成干(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)過程。
設備特點(dian)
該設備與其他干燥(zao)設備相比,生產(chan)能力大(da),可連續操作; 結構簡單,操作方(fang)便(bian);故障少,維(wei)修費用低;適(shi)用范(fan)圍廣,流體(ti)阻力小,可以用它干燥(zao)顆料狀物料,對于那些(xie)附著性(xing)大(da)的(de)物料也很有(you)利;操作彈性(xing)大(da),生產(chan)上允(yun)許產(chan)品(pin)的(de)流量(liang)有(you)較大(da)波動(dong)范(fan)圍,不會影(ying)響(xiang)產(chan)品(pin)的(de)質(zhi)量(liang);清(qing)掃容(rong)易。