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)(mei)的(de)發電廠將煤(mei)(mei)磨(mo)成100微米以下的(de)煤(mei)(mei)粉,用(yong)預(yu)熱空氣(qi)噴入爐(lu)膛經燃燒形成懸(xuan)浮(fu)狀態,產生混雜有(you)大量不(bu)燃物的(de)高溫煙氣(qi),經集塵裝置(zhi)捕集就得到了粉煤(mei)(mei)灰。粉煤(mei)(mei)灰的(de)化(hua)(hua)學組成與粘土質相似,主要成分為二(er)氧(yang)化(hua)(hua)硅、三氧(yang)化(hua)(hua)二(er)鋁、三氧(yang)化(hua)(hua)二(er)鐵、氧(yang)化(hua)(hua)鈣和未(wei)燃盡碳。
工作(zuo)原理
濕粉煤灰由供料裝(zhuang)置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng),實現順流(liu)烘(hong)干(gan)(gan)(gan), 粉煤灰在(zai)(zai)(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)抄板(ban)下(xia)不(bu)斷抄起、散(san)落呈螺(luo)旋行(xing)(xing)(xing)進(jin)(jin)式(shi)實現熱交(jiao)換,物(wu)(wu)(wu)(wu)料移動至內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)另一端(duan)進(jin)(jin)入(ru)中層(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)逆流(liu)烘(hong)干(gan)(gan)(gan),物(wu)(wu)(wu)(wu)料在(zai)(zai)(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地被反復揚(yang)進(jin)(jin),呈進(jin)(jin)兩步退一步的(de)(de)(de)行(xing)(xing)(xing)進(jin)(jin)方式(shi),物(wu)(wu)(wu)(wu)料在(zai)(zai)(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒散(san)發的(de)(de)(de)熱量(liang)(liang),又吸收中層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)(de)熱量(liang)(liang),同時又延(yan)長了干(gan)(gan)(gan)燥時間,物(wu)(wu)(wu)(wu)料在(zai)(zai)(zai)(zai)此達(da)到干(gan)(gan)(gan)燥狀(zhuang)態。物(wu)(wu)(wu)(wu)料行(xing)(xing)(xing)至中層(ceng)(ceng)(ceng)(ceng)(ceng)另一端(duan)而(er)落入(ru)外層(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)(wu)(wu)(wu)料在(zai)(zai)(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒內(nei)呈矩(ju)形多回路方式(shi)行(xing)(xing)(xing)進(jin)(jin),達(da)到干(gan)(gan)(gan)燥效(xiao)(xiao)果的(de)(de)(de)物(wu)(wu)(wu)(wu)料在(zai)(zai)(zai)(zai)熱風作用下(xia)快速行(xing)(xing)(xing)進(jin)(jin)排出滾(gun)筒,沒有達(da)到干(gan)(gan)(gan)燥效(xiao)(xiao)果的(de)(de)(de)濕物(wu)(wu)(wu)(wu)料因自重(zhong)而(er)不(bu)能(neng)快速行(xing)(xing)(xing)進(jin)(jin),物(wu)(wu)(wu)(wu)料在(zai)(zai)(zai)(zai)此矩(ju)形抄板(ban)內(nei)進(jin)(jin)行(xing)(xing)(xing)充分干(gan)(gan)(gan)燥,由此達(da)到干(gan)(gan)(gan)燥效(xiao)(xiao)果,完成干(gan)(gan)(gan)燥過程。
設備特(te)點
該設(she)備與(yu)其(qi)他干燥設(she)備相比,生產(chan)能力大(da),可連續操作; 結(jie)構簡單,操作方(fang)便(bian);故(gu)障(zhang)少,維修費用低;適用范(fan)(fan)圍廣,流體(ti)阻力小(xiao),可以用它干燥顆料狀物料,對于那些附著性大(da)的物料也很有利;操作彈性大(da),生產(chan)上允許產(chan)品的流量有較大(da)波動范(fan)(fan)圍,不(bu)會影響產(chan)品的質量;清掃容(rong)易。