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。
它是燃(ran)燒煤的發(fa)電廠將煤磨成100微(wei)米以下的煤粉(fen),用預熱空氣噴入爐膛(tang)經燃(ran)燒形成懸浮狀態,產生(sheng)混雜(za)有大(da)量不(bu)燃(ran)物(wu)的高溫煙氣,經集(ji)塵(chen)裝(zhuang)置捕集(ji)就得到了(le)粉(fen)煤灰(hui)。粉(fen)煤灰(hui)的化(hua)(hua)學組成與粘土質相似(si),主要成分為二(er)氧化(hua)(hua)硅、三氧化(hua)(hua)二(er)鋁、三氧化(hua)(hua)二(er)鐵、氧化(hua)(hua)鈣(gai)和(he)未燃(ran)盡碳。
工作(zuo)原理
濕粉煤灰(hui)由供料(liao)(liao)(liao)(liao)裝置進(jin)(jin)入三(san)層(ceng)(ceng)滾(gun)(gun)筒的內(nei)層(ceng)(ceng),實現(xian)順流烘干(gan)(gan), 粉煤灰(hui)在(zai)內(nei)層(ceng)(ceng)的抄板下不斷抄起、散(san)落(luo)呈(cheng)螺旋行(xing)(xing)(xing)進(jin)(jin)式實現(xian)熱(re)交換,物(wu)(wu)料(liao)(liao)(liao)(liao)移動至(zhi)內(nei)層(ceng)(ceng)的另一端進(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan)(gan),物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)不斷地被反復揚進(jin)(jin),呈(cheng)進(jin)(jin)兩步(bu)退一步(bu)的行(xing)(xing)(xing)進(jin)(jin)方式,物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)既充(chong)分(fen)吸收內(nei)層(ceng)(ceng)滾(gun)(gun)筒散(san)發的熱(re)量,又吸收中(zhong)(zhong)層(ceng)(ceng)滾(gun)(gun)筒的熱(re)量,同時(shi)又延長了干(gan)(gan)燥(zao)(zao)時(shi)間,物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)(ci)達(da)(da)(da)到干(gan)(gan)燥(zao)(zao)狀態。物(wu)(wu)料(liao)(liao)(liao)(liao)行(xing)(xing)(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)另一端而落(luo)入外(wai)層(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)外(wai)層(ceng)(ceng)滾(gun)(gun)筒內(nei)呈(cheng)矩形(xing)多回(hui)路方式行(xing)(xing)(xing)進(jin)(jin),達(da)(da)(da)到干(gan)(gan)燥(zao)(zao)效(xiao)果(guo)的物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)熱(re)風(feng)作用下快速(su)行(xing)(xing)(xing)進(jin)(jin)排出滾(gun)(gun)筒,沒(mei)有達(da)(da)(da)到干(gan)(gan)燥(zao)(zao)效(xiao)果(guo)的濕物(wu)(wu)料(liao)(liao)(liao)(liao)因自重而不能(neng)快速(su)行(xing)(xing)(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)(liao)在(zai)此(ci)(ci)矩形(xing)抄板內(nei)進(jin)(jin)行(xing)(xing)(xing)充(chong)分(fen)干(gan)(gan)燥(zao)(zao),由此(ci)(ci)達(da)(da)(da)到干(gan)(gan)燥(zao)(zao)效(xiao)果(guo),完成干(gan)(gan)燥(zao)(zao)過程。
設備特點
該設備與其他(ta)干燥設備相比,生(sheng)產能(neng)力大,可(ke)連續(xu)操作(zuo); 結構(gou)簡單,操作(zuo)方便;故(gu)障少(shao),維修費用(yong)低;適(shi)用(yong)范(fan)圍(wei)廣,流(liu)體阻力小,可(ke)以用(yong)它干燥顆料(liao)狀物料(liao),對于那些附著性大的物料(liao)也很(hen)有利;操作(zuo)彈性大,生(sheng)產上允許產品的流(liu)量(liang)有較大波(bo)動范(fan)圍(wei),不(bu)會影響產品的質量(liang);清掃容易。