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(mei)的發電廠將煤(mei)磨成(cheng)(cheng)(cheng)100微米(mi)以下的煤(mei)粉(fen),用預熱空氣(qi)噴入爐膛(tang)經燃燒(shao)形成(cheng)(cheng)(cheng)懸(xuan)浮狀(zhuang)態,產生(sheng)混(hun)雜有大量不燃物的高(gao)溫煙氣(qi),經集(ji)塵裝置捕集(ji)就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的化學(xue)組(zu)成(cheng)(cheng)(cheng)與(yu)粘土質(zhi)相似,主(zhu)要(yao)成(cheng)(cheng)(cheng)分為二氧(yang)化硅、三氧(yang)化二鋁、三氧(yang)化二鐵、氧(yang)化鈣和未燃盡碳(tan)。
工(gong)作原理
濕(shi)粉煤灰(hui)由(you)供料(liao)(liao)裝置進(jin)(jin)(jin)入(ru)三層(ceng)(ceng)滾筒的(de)(de)(de)內(nei)層(ceng)(ceng),實(shi)現順流烘干(gan), 粉煤灰(hui)在(zai)(zai)內(nei)層(ceng)(ceng)的(de)(de)(de)抄(chao)板下(xia)不斷(duan)抄(chao)起、散落(luo)呈螺旋(xuan)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)式(shi)實(shi)現熱(re)交換,物料(liao)(liao)移動至內(nei)層(ceng)(ceng)的(de)(de)(de)另一(yi)端進(jin)(jin)(jin)入(ru)中(zhong)層(ceng)(ceng),進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)逆(ni)流烘干(gan),物料(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩(liang)步退一(yi)步的(de)(de)(de)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)方(fang)式(shi),物料(liao)(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)既充(chong)(chong)分吸(xi)收內(nei)層(ceng)(ceng)滾筒散發的(de)(de)(de)熱(re)量,又(you)吸(xi)收中(zhong)層(ceng)(ceng)滾筒的(de)(de)(de)熱(re)量,同時(shi)又(you)延長了干(gan)燥(zao)(zao)(zao)(zao)時(shi)間,物料(liao)(liao)在(zai)(zai)此(ci)達(da)(da)到(dao)(dao)干(gan)燥(zao)(zao)(zao)(zao)狀(zhuang)態。物料(liao)(liao)行(xing)(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)另一(yi)端而(er)(er)落(luo)入(ru)外層(ceng)(ceng),物料(liao)(liao)在(zai)(zai)外層(ceng)(ceng)滾筒內(nei)呈矩(ju)形(xing)多回(hui)路(lu)方(fang)式(shi)行(xing)(xing)(xing)(xing)進(jin)(jin)(jin),達(da)(da)到(dao)(dao)干(gan)燥(zao)(zao)(zao)(zao)效果的(de)(de)(de)物料(liao)(liao)在(zai)(zai)熱(re)風作用下(xia)快速行(xing)(xing)(xing)(xing)進(jin)(jin)(jin)排(pai)出(chu)滾筒,沒有達(da)(da)到(dao)(dao)干(gan)燥(zao)(zao)(zao)(zao)效果的(de)(de)(de)濕(shi)物料(liao)(liao)因自重而(er)(er)不能快速行(xing)(xing)(xing)(xing)進(jin)(jin)(jin),物料(liao)(liao)在(zai)(zai)此(ci)矩(ju)形(xing)抄(chao)板內(nei)進(jin)(jin)(jin)行(xing)(xing)(xing)(xing)充(chong)(chong)分干(gan)燥(zao)(zao)(zao)(zao),由(you)此(ci)達(da)(da)到(dao)(dao)干(gan)燥(zao)(zao)(zao)(zao)效果,完(wan)成干(gan)燥(zao)(zao)(zao)(zao)過程。
設備特(te)點
該(gai)設(she)備與(yu)其他干(gan)燥設(she)備相比,生產(chan)能力大,可連續操作(zuo); 結構簡單,操作(zuo)方(fang)便;故(gu)障少(shao),維修費用(yong)低;適用(yong)范(fan)圍廣(guang),流(liu)體阻力小,可以用(yong)它干(gan)燥顆料(liao)狀(zhuang)物料(liao),對于那些附著性大的(de)物料(liao)也很有(you)(you)利;操作(zuo)彈性大,生產(chan)上允許產(chan)品(pin)的(de)流(liu)量有(you)(you)較(jiao)大波動范(fan)圍,不會影響產(chan)品(pin)的(de)質量;清(qing)掃容易。