煤粉(fen)灰烘干機(ji)是煤粉(fen)經高溫(wen)燃燒后形成的一種似火山灰質混合(he)材(cai)料(liao)。
它是燃(ran)燒煤的(de)(de)發(fa)電(dian)廠將煤磨成100微(wei)米以下的(de)(de)煤粉(fen)(fen),用(yong)預熱(re)空(kong)氣噴入爐膛經燃(ran)燒形成懸浮(fu)狀態,產生混(hun)雜有大量不燃(ran)物的(de)(de)高溫煙氣,經集塵裝置(zhi)捕(bu)集就得到了(le)粉(fen)(fen)煤灰。粉(fen)(fen)煤灰的(de)(de)化(hua)學(xue)組成與粘(zhan)土(tu)質相似(si),主要成分為二氧化(hua)硅(gui)、三氧化(hua)二鋁、三氧化(hua)二鐵(tie)、氧化(hua)鈣和未燃(ran)盡碳。
工作原理
濕(shi)粉煤(mei)(mei)灰(hui)由供料(liao)(liao)(liao)裝置進(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng),實現(xian)順流(liu)(liu)烘干(gan)(gan)(gan), 粉煤(mei)(mei)灰(hui)在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)板下不(bu)(bu)斷抄(chao)起、散(san)落呈螺旋行(xing)進(jin)(jin)(jin)式實現(xian)熱(re)交換,物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)另一(yi)(yi)端(duan)進(jin)(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)(jin)行(xing)逆流(liu)(liu)烘干(gan)(gan)(gan),物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不(bu)(bu)斷地被(bei)反復揚(yang)進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩步(bu)退(tui)一(yi)(yi)步(bu)的(de)(de)行(xing)進(jin)(jin)(jin)方式,物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既(ji)充(chong)分吸(xi)收內(nei)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)散(san)發的(de)(de)熱(re)量,又吸(xi)收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)的(de)(de)熱(re)量,同(tong)時(shi)又延長了(le)干(gan)(gan)(gan)燥(zao)(zao)時(shi)間,物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此達(da)到(dao)干(gan)(gan)(gan)燥(zao)(zao)狀態。物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)行(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另一(yi)(yi)端(duan)而落入(ru)外(wai)層(ceng)(ceng)(ceng)(ceng),物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)(tong)內(nei)呈矩形多(duo)回路(lu)方式行(xing)進(jin)(jin)(jin),達(da)到(dao)干(gan)(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果的(de)(de)物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)熱(re)風作(zuo)用下快速行(xing)進(jin)(jin)(jin)排出(chu)滾筒(tong)(tong),沒有(you)達(da)到(dao)干(gan)(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果的(de)(de)濕(shi)物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)因(yin)自重而不(bu)(bu)能快速行(xing)進(jin)(jin)(jin),物(wu)(wu)(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此矩形抄(chao)板內(nei)進(jin)(jin)(jin)行(xing)充(chong)分干(gan)(gan)(gan)燥(zao)(zao),由此達(da)到(dao)干(gan)(gan)(gan)燥(zao)(zao)效(xiao)(xiao)果,完(wan)成干(gan)(gan)(gan)燥(zao)(zao)過程。
設備特(te)點
該設備與其他(ta)干(gan)燥設備相(xiang)比,生(sheng)產(chan)能力大(da),可(ke)連續操作; 結構簡單,操作方便;故(gu)障(zhang)少,維修費用低;適用范圍廣,流體阻力小,可(ke)以用它干(gan)燥顆料狀物(wu)料,對于(yu)那(nei)些附著(zhu)性大(da)的物(wu)料也很(hen)有利;操作彈(dan)性大(da),生(sheng)產(chan)上允許產(chan)品的流量(liang)有較大(da)波動范圍,不會影響產(chan)品的質量(liang);清掃容易。