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(ta)是燃燒煤(mei)的發電廠將煤(mei)磨成100微(wei)米(mi)以下的煤(mei)粉,用預熱空氣(qi)噴入爐(lu)膛經(jing)燃燒形成懸浮(fu)狀態(tai),產生混雜(za)有大量不燃物的高溫煙氣(qi),經(jing)集塵裝置捕(bu)集就得(de)到了粉煤(mei)灰(hui)。粉煤(mei)灰(hui)的化學組成與粘土質相似,主要成分為(wei)二(er)氧(yang)化硅、三氧(yang)化二(er)鋁、三氧(yang)化二(er)鐵、氧(yang)化鈣(gai)和未(wei)燃盡(jin)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)(jin)入三層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的內(nei)(nei)(nei)層(ceng)(ceng),實(shi)現順流烘(hong)干(gan), 粉煤(mei)灰在(zai)(zai)內(nei)(nei)(nei)層(ceng)(ceng)的抄(chao)板下不(bu)斷(duan)抄(chao)起、散落(luo)呈螺旋行(xing)(xing)進(jin)(jin)(jin)式(shi)實(shi)現熱(re)(re)(re)交換,物料(liao)(liao)(liao)(liao)(liao)移(yi)動(dong)至內(nei)(nei)(nei)層(ceng)(ceng)的另一端(duan)進(jin)(jin)(jin)入中層(ceng)(ceng),進(jin)(jin)(jin)行(xing)(xing)逆流烘(hong)干(gan),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)不(bu)斷(duan)地被反復揚(yang)進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩步(bu)退一步(bu)的行(xing)(xing)進(jin)(jin)(jin)方(fang)式(shi),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)既充分(fen)吸收內(nei)(nei)(nei)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)散發的熱(re)(re)(re)量,又吸收中層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的熱(re)(re)(re)量,同時又延長了干(gan)燥(zao)時間,物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此達(da)到干(gan)燥(zao)狀態。物料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)至中層(ceng)(ceng)另一端(duan)而落(luo)入外層(ceng)(ceng),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)(tong)內(nei)(nei)(nei)呈矩(ju)形多(duo)回路方(fang)式(shi)行(xing)(xing)進(jin)(jin)(jin),達(da)到干(gan)燥(zao)效(xiao)果(guo)的物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)熱(re)(re)(re)風作用(yong)下快速行(xing)(xing)進(jin)(jin)(jin)排(pai)出滾(gun)(gun)筒(tong)(tong)(tong),沒(mei)有達(da)到干(gan)燥(zao)效(xiao)果(guo)的濕(shi)物料(liao)(liao)(liao)(liao)(liao)因自重而不(bu)能(neng)快速行(xing)(xing)進(jin)(jin)(jin),物料(liao)(liao)(liao)(liao)(liao)在(zai)(zai)此矩(ju)形抄(chao)板內(nei)(nei)(nei)進(jin)(jin)(jin)行(xing)(xing)充分(fen)干(gan)燥(zao),由此達(da)到干(gan)燥(zao)效(xiao)果(guo),完成干(gan)燥(zao)過程。
設(she)備特(te)點
該設(she)備與其他干燥設(she)備相比,生產能力大(da)(da),可連續(xu)操作(zuo)(zuo); 結構簡單,操作(zuo)(zuo)方便;故障少,維(wei)修費(fei)用(yong)低;適用(yong)范(fan)圍廣,流(liu)體阻力小,可以用(yong)它干燥顆料狀物(wu)料,對于那些附著性(xing)大(da)(da)的物(wu)料也很(hen)有利;操作(zuo)(zuo)彈性(xing)大(da)(da),生產上允(yun)許產品(pin)的流(liu)量(liang)有較大(da)(da)波動范(fan)圍,不會(hui)影響產品(pin)的質量(liang);清掃容(rong)易。