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。
它是燃燒(shao)煤(mei)的發電(dian)廠將煤(mei)磨成(cheng)100微(wei)米以下的煤(mei)粉,用預熱空氣噴入爐(lu)膛經燃燒(shao)形成(cheng)懸(xuan)浮狀態,產生混雜有大量不燃物的高溫煙氣,經集(ji)塵裝置捕(bu)集(ji)就得到了粉煤(mei)灰。粉煤(mei)灰的化學組成(cheng)與粘土質相似,主要成(cheng)分為二氧化硅(gui)、三氧化二鋁(lv)、三氧化二鐵(tie)、氧化鈣和未燃盡碳。
工(gong)作原理
濕粉煤灰由供料(liao)(liao)(liao)(liao)裝置進(jin)入三(san)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng),實現(xian)順流烘干(gan)(gan), 粉煤灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)的(de)(de)抄板下不斷(duan)抄起、散(san)落呈(cheng)螺旋(xuan)行(xing)進(jin)式(shi)實現(xian)熱(re)交(jiao)換,物(wu)料(liao)(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)的(de)(de)另(ling)一端(duan)進(jin)入中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng),進(jin)行(xing)逆流烘干(gan)(gan),物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)不斷(duan)地被反復揚進(jin),呈(cheng)進(jin)兩步(bu)(bu)退一步(bu)(bu)的(de)(de)行(xing)進(jin)方(fang)式(shi),物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)既充分吸(xi)收內(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)散(san)發的(de)(de)熱(re)量(liang),又吸(xi)收中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)的(de)(de)熱(re)量(liang),同(tong)時又延長了干(gan)(gan)燥(zao)(zao)時間,物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)達(da)到(dao)干(gan)(gan)燥(zao)(zao)狀態。物(wu)料(liao)(liao)(liao)(liao)行(xing)至中(zhong)(zhong)(zhong)層(ceng)(ceng)(ceng)另(ling)一端(duan)而落入外(wai)層(ceng)(ceng)(ceng),物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)內(nei)呈(cheng)矩形(xing)多回(hui)路方(fang)式(shi)行(xing)進(jin),達(da)到(dao)干(gan)(gan)燥(zao)(zao)效果(guo)的(de)(de)物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)熱(re)風作用下快速行(xing)進(jin)排出(chu)滾(gun)筒(tong)(tong),沒有達(da)到(dao)干(gan)(gan)燥(zao)(zao)效果(guo)的(de)(de)濕物(wu)料(liao)(liao)(liao)(liao)因自(zi)重而不能快速行(xing)進(jin),物(wu)料(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)矩形(xing)抄板內(nei)進(jin)行(xing)充分干(gan)(gan)燥(zao)(zao),由此(ci)達(da)到(dao)干(gan)(gan)燥(zao)(zao)效果(guo),完成(cheng)干(gan)(gan)燥(zao)(zao)過程。
設(she)備特點
該設(she)備(bei)與其(qi)他干燥(zao)設(she)備(bei)相比,生產(chan)能(neng)力(li)大(da)(da),可(ke)連續(xu)操(cao)作(zuo)(zuo); 結構簡單,操(cao)作(zuo)(zuo)方便;故障少,維修(xiu)費用低(di);適(shi)用范(fan)圍廣(guang),流(liu)體阻(zu)力(li)小,可(ke)以(yi)用它干燥(zao)顆料(liao)狀(zhuang)物料(liao),對于那些(xie)附著性大(da)(da)的(de)物料(liao)也很有利(li);操(cao)作(zuo)(zuo)彈性大(da)(da),生產(chan)上允許(xu)產(chan)品的(de)流(liu)量有較大(da)(da)波動范(fan)圍,不會影響產(chan)品的(de)質量;清掃容易。