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)燒煤(mei)(mei)的發電廠將煤(mei)(mei)磨成(cheng)100微(wei)米以下的煤(mei)(mei)粉,用預熱(re)空(kong)氣噴入爐膛經燃(ran)(ran)燒形成(cheng)懸浮狀態,產(chan)生混雜有大量不燃(ran)(ran)物的高溫(wen)煙(yan)氣,經集(ji)塵裝(zhuang)置(zhi)捕(bu)集(ji)就得(de)到了粉煤(mei)(mei)灰(hui)。粉煤(mei)(mei)灰(hui)的化學組(zu)成(cheng)與粘土質相似,主要成(cheng)分為二氧化硅(gui)、三氧化二鋁、三氧化二鐵、氧化鈣和未燃(ran)(ran)盡碳。
工作原理
濕粉煤(mei)灰由供料(liao)(liao)(liao)(liao)(liao)裝置(zhi)進(jin)(jin)入三層(ceng)(ceng)(ceng)滾筒(tong)(tong)(tong)的(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng),實(shi)現順流(liu)烘(hong)干(gan), 粉煤(mei)灰在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)抄(chao)板下(xia)不(bu)(bu)斷抄(chao)起、散落呈螺旋行(xing)(xing)進(jin)(jin)式(shi)實(shi)現熱交換,物(wu)料(liao)(liao)(liao)(liao)(liao)移動至內(nei)(nei)層(ceng)(ceng)(ceng)的(de)(de)另一(yi)端進(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)行(xing)(xing)逆流(liu)烘(hong)干(gan),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不(bu)(bu)斷地(di)被反復揚進(jin)(jin),呈進(jin)(jin)兩(liang)步退一(yi)步的(de)(de)行(xing)(xing)進(jin)(jin)方式(shi),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既充分吸(xi)收內(nei)(nei)層(ceng)(ceng)(ceng)滾筒(tong)(tong)(tong)散發的(de)(de)熱量,又吸(xi)收中(zhong)層(ceng)(ceng)(ceng)滾筒(tong)(tong)(tong)的(de)(de)熱量,同時(shi)又延長了干(gan)燥(zao)(zao)時(shi)間,物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)此達(da)到(dao)(dao)干(gan)燥(zao)(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)(liao)行(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)另一(yi)端而(er)落入外層(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)滾筒(tong)(tong)(tong)內(nei)(nei)呈矩形多(duo)回路方式(shi)行(xing)(xing)進(jin)(jin),達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果的(de)(de)物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)熱風作用下(xia)快速行(xing)(xing)進(jin)(jin)排出(chu)滾筒(tong)(tong)(tong),沒有(you)達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果的(de)(de)濕物(wu)料(liao)(liao)(liao)(liao)(liao)因自重而(er)不(bu)(bu)能快速行(xing)(xing)進(jin)(jin),物(wu)料(liao)(liao)(liao)(liao)(liao)在(zai)此矩形抄(chao)板內(nei)(nei)進(jin)(jin)行(xing)(xing)充分干(gan)燥(zao)(zao),由此達(da)到(dao)(dao)干(gan)燥(zao)(zao)效(xiao)果,完成干(gan)燥(zao)(zao)過程。
設備特點(dian)
該設備(bei)與(yu)其他(ta)干(gan)燥(zao)設備(bei)相比,生(sheng)產能(neng)力(li)大(da)(da),可(ke)連續操作(zuo); 結(jie)構簡(jian)單,操作(zuo)方(fang)便;故(gu)障(zhang)少,維修費用低;適(shi)用范圍廣,流(liu)體(ti)阻力(li)小,可(ke)以用它干(gan)燥(zao)顆(ke)料(liao)狀(zhuang)物料(liao),對于那(nei)些附(fu)著性(xing)(xing)大(da)(da)的(de)物料(liao)也很有利;操作(zuo)彈性(xing)(xing)大(da)(da),生(sheng)產上允許產品(pin)的(de)流(liu)量有較大(da)(da)波動范圍,不會影響產品(pin)的(de)質量;清掃容易。