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(shi)燃(ran)(ran)燒(shao)煤(mei)的發電廠將煤(mei)磨成(cheng)(cheng)100微(wei)米以下的煤(mei)粉(fen),用預熱(re)空(kong)氣噴入爐膛經(jing)燃(ran)(ran)燒(shao)形成(cheng)(cheng)懸浮(fu)狀態,產(chan)生混雜(za)有大量不燃(ran)(ran)物的高溫煙氣,經(jing)集塵裝置捕(bu)集就得(de)到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的化(hua)學組成(cheng)(cheng)與粘土(tu)質相似,主要(yao)成(cheng)(cheng)分為二(er)氧化(hua)硅、三(san)氧化(hua)二(er)鋁、三(san)氧化(hua)二(er)鐵、氧化(hua)鈣和未燃(ran)(ran)盡碳(tan)。
工作原理
濕(shi)粉煤(mei)灰(hui)由供料(liao)裝置(zhi)進(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)內層(ceng)(ceng)(ceng)(ceng),實現(xian)順流(liu)(liu)烘干(gan)(gan), 粉煤(mei)灰(hui)在(zai)(zai)內層(ceng)(ceng)(ceng)(ceng)的(de)(de)抄板下(xia)不(bu)(bu)斷抄起、散(san)落(luo)呈螺旋行(xing)(xing)(xing)進(jin)(jin)式實現(xian)熱(re)交(jiao)換,物(wu)(wu)(wu)料(liao)移動至內層(ceng)(ceng)(ceng)(ceng)的(de)(de)另一(yi)(yi)端進(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)逆流(liu)(liu)烘干(gan)(gan),物(wu)(wu)(wu)料(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)(bu)斷地被(bei)反復(fu)揚進(jin)(jin),呈進(jin)(jin)兩步退一(yi)(yi)步的(de)(de)行(xing)(xing)(xing)進(jin)(jin)方式,物(wu)(wu)(wu)料(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸收內層(ceng)(ceng)(ceng)(ceng)滾筒(tong)散(san)發的(de)(de)熱(re)量(liang),又吸收中(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)(de)熱(re)量(liang),同時又延長(chang)了干(gan)(gan)燥(zao)時間,物(wu)(wu)(wu)料(liao)在(zai)(zai)此達到(dao)干(gan)(gan)燥(zao)狀態(tai)。物(wu)(wu)(wu)料(liao)行(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)(ceng)另一(yi)(yi)端而(er)落(luo)入外(wai)層(ceng)(ceng)(ceng)(ceng),物(wu)(wu)(wu)料(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)內呈矩形多(duo)回路(lu)方式行(xing)(xing)(xing)進(jin)(jin),達到(dao)干(gan)(gan)燥(zao)效(xiao)(xiao)果(guo)的(de)(de)物(wu)(wu)(wu)料(liao)在(zai)(zai)熱(re)風作用下(xia)快速行(xing)(xing)(xing)進(jin)(jin)排出滾筒(tong),沒有達到(dao)干(gan)(gan)燥(zao)效(xiao)(xiao)果(guo)的(de)(de)濕(shi)物(wu)(wu)(wu)料(liao)因(yin)自(zi)重而(er)不(bu)(bu)能快速行(xing)(xing)(xing)進(jin)(jin),物(wu)(wu)(wu)料(liao)在(zai)(zai)此矩形抄板內進(jin)(jin)行(xing)(xing)(xing)充分干(gan)(gan)燥(zao),由此達到(dao)干(gan)(gan)燥(zao)效(xiao)(xiao)果(guo),完成(cheng)干(gan)(gan)燥(zao)過程。
設備特點
該設(she)備與其他干(gan)(gan)燥設(she)備相比,生產(chan)能力大(da)(da),可(ke)連續(xu)操(cao)作(zuo)(zuo); 結構簡單,操(cao)作(zuo)(zuo)方便;故障少,維修費用低;適(shi)用范(fan)圍廣(guang),流體阻力小,可(ke)以用它干(gan)(gan)燥顆(ke)料(liao)狀物料(liao),對于那些附著性(xing)大(da)(da)的物料(liao)也很有(you)利;操(cao)作(zuo)(zuo)彈性(xing)大(da)(da),生產(chan)上(shang)允許產(chan)品的流量(liang)有(you)較(jiao)大(da)(da)波動范(fan)圍,不會影(ying)響(xiang)產(chan)品的質量(liang);清掃容易。