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。
它是燃燒煤(mei)的發電廠將煤(mei)磨成(cheng)100微(wei)(wei)米以下的煤(mei)粉,用預熱空氣噴入(ru)爐膛(tang)經(jing)燃燒形(xing)成(cheng)懸浮狀態,產(chan)生混(hun)雜有大(da)量不燃物的高(gao)溫煙氣,經(jing)集塵裝置捕集就(jiu)得到了粉煤(mei)灰。粉煤(mei)灰的化(hua)學組(zu)成(cheng)與粘土質相(xiang)似,主要成(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(wei)燃盡(jin)碳。
工作原(yuan)理
濕粉(fen)煤(mei)灰由供料(liao)(liao)裝置進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)滾筒的(de)(de)內(nei)(nei)(nei)層(ceng)(ceng)(ceng)(ceng),實現順流烘(hong)干(gan), 粉(fen)煤(mei)灰在(zai)內(nei)(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)(chao)板下不斷抄(chao)(chao)起、散(san)落(luo)呈螺旋(xuan)行(xing)(xing)進(jin)(jin)(jin)(jin)式實現熱交換(huan),物料(liao)(liao)移動至內(nei)(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的(de)(de)另一(yi)端進(jin)(jin)(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)逆流烘(hong)干(gan),物料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不斷地(di)被反復揚進(jin)(jin)(jin)(jin),呈進(jin)(jin)(jin)(jin)兩步退一(yi)步的(de)(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方(fang)式,物料(liao)(liao)在(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既充分吸(xi)收內(nei)(nei)(nei)層(ceng)(ceng)(ceng)(ceng)滾筒散(san)發的(de)(de)熱量(liang),又吸(xi)收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒的(de)(de)熱量(liang),同時(shi)又延長了干(gan)燥(zao)(zao)時(shi)間(jian),物料(liao)(liao)在(zai)此(ci)達到干(gan)燥(zao)(zao)狀態。物料(liao)(liao)行(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另一(yi)端而落(luo)入外層(ceng)(ceng)(ceng)(ceng),物料(liao)(liao)在(zai)外層(ceng)(ceng)(ceng)(ceng)滾筒內(nei)(nei)(nei)呈矩形多回路(lu)方(fang)式行(xing)(xing)進(jin)(jin)(jin)(jin),達到干(gan)燥(zao)(zao)效果(guo)的(de)(de)物料(liao)(liao)在(zai)熱風作用下快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin)排出滾筒,沒有達到干(gan)燥(zao)(zao)效果(guo)的(de)(de)濕物料(liao)(liao)因自重而不能快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin),物料(liao)(liao)在(zai)此(ci)矩形抄(chao)(chao)板內(nei)(nei)(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充分干(gan)燥(zao)(zao),由此(ci)達到干(gan)燥(zao)(zao)效果(guo),完成干(gan)燥(zao)(zao)過程。
設備特點
該設備與其他干燥(zao)設備相比,生產(chan)能(neng)力大,可(ke)連(lian)續(xu)操(cao)(cao)作(zuo); 結(jie)構簡單,操(cao)(cao)作(zuo)方便;故障少,維(wei)修費用(yong)低;適用(yong)范(fan)圍廣,流體阻力小,可(ke)以用(yong)它干燥(zao)顆料狀(zhuang)物料,對于(yu)那些附著性大的(de)物料也很有(you)利;操(cao)(cao)作(zuo)彈性大,生產(chan)上允許產(chan)品(pin)的(de)流量(liang)有(you)較大波動(dong)范(fan)圍,不(bu)會影響產(chan)品(pin)的(de)質量(liang);清掃容易。