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)燒煤(mei)(mei)的發電廠將(jiang)煤(mei)(mei)磨成(cheng)(cheng)(cheng)100微(wei)米(mi)以下(xia)的煤(mei)(mei)粉,用預(yu)熱空氣噴入爐(lu)膛經(jing)燃(ran)燒形成(cheng)(cheng)(cheng)懸浮狀態,產生混雜(za)有大量不(bu)燃(ran)物的高溫煙氣,經(jing)集塵裝置捕(bu)集就(jiu)得(de)到(dao)了粉煤(mei)(mei)灰。粉煤(mei)(mei)灰的化(hua)學組成(cheng)(cheng)(cheng)與粘(zhan)土質(zhi)相似,主要(yao)成(cheng)(cheng)(cheng)分為(wei)二氧化(hua)硅、三氧化(hua)二鋁(lv)、三氧化(hua)二鐵、氧化(hua)鈣和未燃(ran)盡碳。
工(gong)作原(yuan)理
濕粉煤灰由(you)供(gong)料(liao)(liao)(liao)裝置進(jin)(jin)(jin)入三(san)層(ceng)滾(gun)筒的(de)(de)內(nei)層(ceng),實(shi)現順(shun)流烘干(gan)(gan), 粉煤灰在(zai)(zai)內(nei)層(ceng)的(de)(de)抄板(ban)下不(bu)斷抄起(qi)、散落(luo)呈螺(luo)旋行(xing)(xing)(xing)進(jin)(jin)(jin)式實(shi)現熱交換(huan),物(wu)(wu)(wu)料(liao)(liao)(liao)移動至內(nei)層(ceng)的(de)(de)另一(yi)端進(jin)(jin)(jin)入中(zhong)(zhong)層(ceng),進(jin)(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan)(gan),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)不(bu)斷地(di)被反復揚進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩(liang)步退一(yi)步的(de)(de)行(xing)(xing)(xing)進(jin)(jin)(jin)方(fang)式,物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)既充分吸收內(nei)層(ceng)滾(gun)筒散發的(de)(de)熱量(liang),又(you)吸收中(zhong)(zhong)層(ceng)滾(gun)筒的(de)(de)熱量(liang),同時又(you)延長(chang)了干(gan)(gan)燥(zao)(zao)時間,物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此達(da)(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)狀態。物(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)至中(zhong)(zhong)層(ceng)另一(yi)端而(er)落(luo)入外(wai)層(ceng),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)外(wai)層(ceng)滾(gun)筒內(nei)呈矩(ju)(ju)形多回路方(fang)式行(xing)(xing)(xing)進(jin)(jin)(jin),達(da)(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)效(xiao)果的(de)(de)物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)熱風作用(yong)下快速行(xing)(xing)(xing)進(jin)(jin)(jin)排出滾(gun)筒,沒有達(da)(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)效(xiao)果的(de)(de)濕物(wu)(wu)(wu)料(liao)(liao)(liao)因(yin)自重而(er)不(bu)能快速行(xing)(xing)(xing)進(jin)(jin)(jin),物(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此矩(ju)(ju)形抄板(ban)內(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)充分干(gan)(gan)燥(zao)(zao),由(you)此達(da)(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)效(xiao)果,完成干(gan)(gan)燥(zao)(zao)過程。
設備特點(dian)
該設備(bei)與其(qi)他干燥設備(bei)相比(bi),生(sheng)產能力大(da),可連續操作(zuo); 結構簡單,操作(zuo)方(fang)便;故(gu)障少(shao),維(wei)修費(fei)用(yong)低;適用(yong)范(fan)圍廣,流體阻力小(xiao),可以(yi)用(yong)它(ta)干燥顆料狀物料,對于那些附著性大(da)的物料也很有利(li);操作(zuo)彈性大(da),生(sheng)產上(shang)允許產品的流量(liang)有較大(da)波動(dong)范(fan)圍,不會影響(xiang)產品的質量(liang);清掃容易。