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)(ran)(ran)燒煤的(de)發電廠將煤磨成100微米(mi)以下的(de)煤粉(fen),用預熱(re)空氣噴入爐膛經燃(ran)(ran)(ran)燒形成懸浮(fu)狀態(tai),產生混雜有大(da)量不(bu)燃(ran)(ran)(ran)物的(de)高溫煙氣,經集塵(chen)裝置捕集就得到了粉(fen)煤灰。粉(fen)煤灰的(de)化(hua)(hua)學(xue)組成與粘土質相似,主(zhu)要成分為(wei)二(er)氧(yang)化(hua)(hua)硅、三(san)氧(yang)化(hua)(hua)二(er)鋁、三(san)氧(yang)化(hua)(hua)二(er)鐵(tie)、氧(yang)化(hua)(hua)鈣和未(wei)燃(ran)(ran)(ran)盡碳(tan)。
工(gong)作原理
濕粉煤灰由(you)供料(liao)裝置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)的內層(ceng)(ceng)(ceng),實(shi)(shi)現順流烘干(gan)(gan)(gan)(gan), 粉煤灰在(zai)內層(ceng)(ceng)(ceng)的抄板下不(bu)斷抄起(qi)、散落呈螺旋行(xing)(xing)(xing)進(jin)(jin)式(shi)實(shi)(shi)現熱(re)交換,物(wu)料(liao)移動至(zhi)內層(ceng)(ceng)(ceng)的另一端進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan)(gan)(gan)(gan),物(wu)料(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不(bu)斷地被反復揚進(jin)(jin),呈進(jin)(jin)兩步退一步的行(xing)(xing)(xing)進(jin)(jin)方式(shi),物(wu)料(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既充分(fen)吸收內層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)散發的熱(re)量,又吸收中(zhong)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)的熱(re)量,同時又延長(chang)了干(gan)(gan)(gan)(gan)燥時間(jian),物(wu)料(liao)在(zai)此達(da)到(dao)干(gan)(gan)(gan)(gan)燥狀態。物(wu)料(liao)行(xing)(xing)(xing)至(zhi)中(zhong)層(ceng)(ceng)(ceng)另一端而落入(ru)外(wai)層(ceng)(ceng)(ceng),物(wu)料(liao)在(zai)外(wai)層(ceng)(ceng)(ceng)滾(gun)(gun)筒(tong)內呈矩形(xing)多回路(lu)方式(shi)行(xing)(xing)(xing)進(jin)(jin),達(da)到(dao)干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo)的物(wu)料(liao)在(zai)熱(re)風作用下快速行(xing)(xing)(xing)進(jin)(jin)排(pai)出滾(gun)(gun)筒(tong),沒有(you)達(da)到(dao)干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo)的濕物(wu)料(liao)因自重(zhong)而不(bu)能快速行(xing)(xing)(xing)進(jin)(jin),物(wu)料(liao)在(zai)此矩形(xing)抄板內進(jin)(jin)行(xing)(xing)(xing)充分(fen)干(gan)(gan)(gan)(gan)燥,由(you)此達(da)到(dao)干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo),完成干(gan)(gan)(gan)(gan)燥過程。
設備特點(dian)
該設備(bei)與其他(ta)干燥設備(bei)相比(bi),生(sheng)產(chan)能(neng)力(li)大(da),可連續操(cao)作(zuo)(zuo); 結(jie)構簡單,操(cao)作(zuo)(zuo)方(fang)便;故障少,維修(xiu)費用(yong)(yong)低;適(shi)用(yong)(yong)范(fan)圍(wei)廣,流體阻(zu)力(li)小,可以用(yong)(yong)它干燥顆(ke)料(liao)狀物(wu)料(liao),對于那(nei)些附著性大(da)的(de)物(wu)料(liao)也很有利(li);操(cao)作(zuo)(zuo)彈性大(da),生(sheng)產(chan)上允許產(chan)品的(de)流量有較(jiao)大(da)波(bo)動范(fan)圍(wei),不會影(ying)響(xiang)產(chan)品的(de)質量;清掃容(rong)易。