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(shao)煤的發電廠將煤磨(mo)成(cheng)(cheng)100微米以下的煤粉(fen)(fen)(fen),用預熱空氣噴(pen)入爐(lu)膛經燃(ran)燒(shao)形(xing)成(cheng)(cheng)懸浮狀態,產(chan)生混雜有大量不(bu)燃(ran)物的高溫(wen)煙氣,經集塵裝置捕集就得到了粉(fen)(fen)(fen)煤灰。粉(fen)(fen)(fen)煤灰的化(hua)學(xue)組成(cheng)(cheng)與粘土(tu)質相似,主要成(cheng)(cheng)分為(wei)二氧(yang)化(hua)硅、三(san)氧(yang)化(hua)二鋁、三(san)氧(yang)化(hua)二鐵、氧(yang)化(hua)鈣和未燃(ran)盡(jin)碳。
工作原理
濕粉煤(mei)灰(hui)由(you)(you)供料(liao)(liao)(liao)(liao)裝置進入(ru)三層(ceng)(ceng)(ceng)滾筒(tong)(tong)的內(nei)層(ceng)(ceng)(ceng),實現順流(liu)(liu)烘干(gan)(gan)(gan)(gan), 粉煤(mei)灰(hui)在(zai)內(nei)層(ceng)(ceng)(ceng)的抄板(ban)下不斷抄起(qi)、散落呈螺旋行(xing)(xing)(xing)進式實現熱(re)(re)交換,物料(liao)(liao)(liao)(liao)移(yi)動至(zhi)內(nei)層(ceng)(ceng)(ceng)的另一端進入(ru)中層(ceng)(ceng)(ceng),進行(xing)(xing)(xing)逆流(liu)(liu)烘干(gan)(gan)(gan)(gan),物料(liao)(liao)(liao)(liao)在(zai)中層(ceng)(ceng)(ceng)不斷地被反復揚進,呈進兩步退一步的行(xing)(xing)(xing)進方式,物料(liao)(liao)(liao)(liao)在(zai)中層(ceng)(ceng)(ceng)既(ji)充分(fen)吸收內(nei)層(ceng)(ceng)(ceng)滾筒(tong)(tong)散發的熱(re)(re)量,又吸收中層(ceng)(ceng)(ceng)滾筒(tong)(tong)的熱(re)(re)量,同時又延長(chang)了干(gan)(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)時間,物料(liao)(liao)(liao)(liao)在(zai)此(ci)達到干(gan)(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)狀態。物料(liao)(liao)(liao)(liao)行(xing)(xing)(xing)至(zhi)中層(ceng)(ceng)(ceng)另一端而(er)落入(ru)外層(ceng)(ceng)(ceng),物料(liao)(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾筒(tong)(tong)內(nei)呈矩形多回路方式行(xing)(xing)(xing)進,達到干(gan)(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)效(xiao)(xiao)(xiao)果的物料(liao)(liao)(liao)(liao)在(zai)熱(re)(re)風作用下快速行(xing)(xing)(xing)進排出(chu)滾筒(tong)(tong),沒(mei)有達到干(gan)(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)效(xiao)(xiao)(xiao)果的濕物料(liao)(liao)(liao)(liao)因自(zi)重(zhong)而(er)不能(neng)快速行(xing)(xing)(xing)進,物料(liao)(liao)(liao)(liao)在(zai)此(ci)矩形抄板(ban)內(nei)進行(xing)(xing)(xing)充分(fen)干(gan)(gan)(gan)(gan)燥(zao)(zao)(zao)(zao),由(you)(you)此(ci)達到干(gan)(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)效(xiao)(xiao)(xiao)果,完成干(gan)(gan)(gan)(gan)燥(zao)(zao)(zao)(zao)過程(cheng)。
設備(bei)特點
該設(she)備與其他(ta)干(gan)(gan)燥設(she)備相(xiang)比,生產(chan)能力大(da)(da),可連續(xu)操(cao)作; 結(jie)構簡(jian)單,操(cao)作方便;故障少,維(wei)修費用(yong)低;適用(yong)范圍廣,流體(ti)阻力小,可以(yi)用(yong)它干(gan)(gan)燥顆料狀物(wu)料,對(dui)于那些(xie)附著性大(da)(da)的物(wu)料也很有利;操(cao)作彈性大(da)(da),生產(chan)上允(yun)許產(chan)品(pin)的流量有較大(da)(da)波(bo)動范圍,不會影(ying)響產(chan)品(pin)的質量;清掃容易。