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(shi)燃燒(shao)煤的發電廠將煤磨成(cheng)100微米以(yi)下的煤粉(fen)(fen),用預熱空氣噴入(ru)爐膛經(jing)燃燒(shao)形成(cheng)懸浮(fu)狀態,產生混(hun)雜(za)有大(da)量(liang)不(bu)燃物的高溫煙氣,經(jing)集(ji)塵裝置(zhi)捕集(ji)就得到(dao)了粉(fen)(fen)煤灰(hui)(hui)。粉(fen)(fen)煤灰(hui)(hui)的化(hua)學組成(cheng)與粘土(tu)質(zhi)相似,主要成(cheng)分為二氧(yang)(yang)化(hua)硅(gui)、三氧(yang)(yang)化(hua)二鋁、三氧(yang)(yang)化(hua)二鐵、氧(yang)(yang)化(hua)鈣和(he)未(wei)燃盡碳(tan)。
工作(zuo)原理
濕粉(fen)煤灰(hui)由(you)供料(liao)(liao)裝置進入三層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的(de)內層(ceng),實(shi)現順(shun)流烘干(gan), 粉(fen)煤灰(hui)在(zai)內層(ceng)的(de)抄板下不斷抄起(qi)、散落(luo)呈螺旋行(xing)(xing)進式實(shi)現熱交換,物(wu)(wu)料(liao)(liao)移(yi)動至內層(ceng)的(de)另(ling)一端進入中(zhong)(zhong)(zhong)層(ceng),進行(xing)(xing)逆流烘干(gan),物(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)(zhong)層(ceng)不斷地被反復(fu)揚(yang)進,呈進兩步退(tui)一步的(de)行(xing)(xing)進方式,物(wu)(wu)料(liao)(liao)在(zai)中(zhong)(zhong)(zhong)層(ceng)既充分(fen)(fen)吸收內層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)散發的(de)熱量,又吸收中(zhong)(zhong)(zhong)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)的(de)熱量,同(tong)時(shi)又延(yan)長了干(gan)燥(zao)(zao)時(shi)間(jian),物(wu)(wu)料(liao)(liao)在(zai)此(ci)(ci)達到干(gan)燥(zao)(zao)狀態(tai)。物(wu)(wu)料(liao)(liao)行(xing)(xing)至中(zhong)(zhong)(zhong)層(ceng)另(ling)一端而落(luo)入外(wai)層(ceng),物(wu)(wu)料(liao)(liao)在(zai)外(wai)層(ceng)滾(gun)(gun)筒(tong)(tong)(tong)內呈矩形多回路(lu)方式行(xing)(xing)進,達到干(gan)燥(zao)(zao)效(xiao)果(guo)的(de)物(wu)(wu)料(liao)(liao)在(zai)熱風作(zuo)用下快速行(xing)(xing)進排出滾(gun)(gun)筒(tong)(tong)(tong),沒(mei)有達到干(gan)燥(zao)(zao)效(xiao)果(guo)的(de)濕物(wu)(wu)料(liao)(liao)因自重(zhong)而不能快速行(xing)(xing)進,物(wu)(wu)料(liao)(liao)在(zai)此(ci)(ci)矩形抄板內進行(xing)(xing)充分(fen)(fen)干(gan)燥(zao)(zao),由(you)此(ci)(ci)達到干(gan)燥(zao)(zao)效(xiao)果(guo),完成干(gan)燥(zao)(zao)過(guo)程。
設備特點(dian)
該設備與其他干(gan)(gan)燥(zao)設備相比,生產能力(li)大(da),可連續操(cao)(cao)作(zuo); 結(jie)構簡(jian)單(dan),操(cao)(cao)作(zuo)方便;故障(zhang)少,維修費(fei)用低;適用范圍廣,流(liu)體阻力(li)小,可以用它干(gan)(gan)燥(zao)顆料(liao)狀物料(liao),對于那些(xie)附著(zhu)性(xing)大(da)的物料(liao)也很有利;操(cao)(cao)作(zuo)彈性(xing)大(da),生產上允許產品(pin)的流(liu)量(liang)有較大(da)波動范圍,不會影響(xiang)產品(pin)的質量(liang);清掃容易(yi)。