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)燒(shao)煤(mei)的發電廠將煤(mei)磨成100微米以下的煤(mei)粉(fen)(fen)，用預熱空氣(qi)噴入爐膛經燃(ran)燒(shao)形成懸浮狀態，產生混雜有大量不燃(ran)物的高溫(wen)煙(yan)氣(qi)，經集塵裝置(zhi)捕集就(jiu)得到了粉(fen)(fen)煤(mei)灰(hui)。粉(fen)(fen)煤(mei)灰(hui)的化學組成與(yu)粘(zhan)土質相似(si)，主要成分為(wei)二氧化硅、三氧化二鋁(lv)、三氧化二鐵、氧化鈣和未燃(ran)盡(jin)碳。

工作原理

濕粉煤(mei)(mei)灰(hui)由供料裝置進(jin)入三層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)內層(ceng)(ceng)(ceng)(ceng),實(shi)現(xian)順(shun)流(liu)烘干(gan)(gan), 粉煤(mei)(mei)灰(hui)在(zai)(zai)內層(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)板下不斷(duan)抄(chao)起、散落呈(cheng)(cheng)螺旋行(xing)(xing)(xing)(xing)進(jin)式(shi)實(shi)現(xian)熱交換，物(wu)(wu)(wu)(wu)料移動至內層(ceng)(ceng)(ceng)(ceng)的(de)(de)另(ling)一端進(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)行(xing)(xing)(xing)(xing)逆(ni)流(liu)烘干(gan)(gan)，物(wu)(wu)(wu)(wu)料在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不斷(duan)地被反(fan)復揚進(jin)，呈(cheng)(cheng)進(jin)兩步退(tui)一步的(de)(de)行(xing)(xing)(xing)(xing)進(jin)方式(shi)，物(wu)(wu)(wu)(wu)料在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既充分(fen)(fen)吸收(shou)內層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散發的(de)(de)熱量(liang)，又(you)吸收(shou)中(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)(de)熱量(liang)，同時又(you)延長了干(gan)(gan)燥(zao)(zao)時間(jian)，物(wu)(wu)(wu)(wu)料在(zai)(zai)此(ci)達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)狀(zhuang)態。物(wu)(wu)(wu)(wu)料行(xing)(xing)(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一端而落入外層(ceng)(ceng)(ceng)(ceng)，物(wu)(wu)(wu)(wu)料在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內呈(cheng)(cheng)矩形(xing)多回路方式(shi)行(xing)(xing)(xing)(xing)進(jin)，達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)效果的(de)(de)物(wu)(wu)(wu)(wu)料在(zai)(zai)熱風(feng)作用下快(kuai)速行(xing)(xing)(xing)(xing)進(jin)排出滾(gun)筒(tong)，沒有達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)效果的(de)(de)濕物(wu)(wu)(wu)(wu)料因(yin)自重而不能快(kuai)速行(xing)(xing)(xing)(xing)進(jin)，物(wu)(wu)(wu)(wu)料在(zai)(zai)此(ci)矩形(xing)抄(chao)板內進(jin)行(xing)(xing)(xing)(xing)充分(fen)(fen)干(gan)(gan)燥(zao)(zao)，由此(ci)達(da)(da)到(dao)(dao)干(gan)(gan)燥(zao)(zao)效果，完成干(gan)(gan)燥(zao)(zao)過(guo)程。

設備(bei)特點(dian)

該設(she)備與其(qi)他干(gan)燥(zao)設(she)備相比，生產(chan)(chan)能力(li)大，可連(lian)續操(cao)(cao)作； 結構簡單，操(cao)(cao)作方便(bian)；故障少，維(wei)修費用(yong)低；適(shi)用(yong)范(fan)圍廣(guang)，流體阻力(li)小，可以用(yong)它(ta)干(gan)燥(zao)顆料狀物料，對(dui)于那些附著性大的(de)物料也很有(you)利(li)；操(cao)(cao)作彈性大，生產(chan)(chan)上允許產(chan)(chan)品的(de)流量(liang)有(you)較大波(bo)動范(fan)圍，不會影響產(chan)(chan)品的(de)質量(liang)；清掃容(rong)易。