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(de)發電廠將煤(mei)磨成100微(wei)米以(yi)下的(de)煤(mei)粉(fen)，用(yong)預熱空氣噴入爐膛(tang)經(jing)燃燒(shao)形成懸浮(fu)狀態，產生混(hun)雜有大量不燃物(wu)的(de)高溫煙氣，經(jing)集塵裝置捕(bu)集就得到了粉(fen)煤(mei)灰。粉(fen)煤(mei)灰的(de)化(hua)學(xue)組成與粘土質(zhi)相似，主要成分為(wei)二氧(yang)化(hua)硅、三(san)氧(yang)化(hua)二鋁、三(san)氧(yang)化(hua)二鐵(tie)、氧(yang)化(hua)鈣和(he)未(wei)燃盡碳(tan)。

工作原理

濕粉(fen)煤灰(hui)由供料(liao)(liao)(liao)(liao)裝置進(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),實(shi)現(xian)順(shun)流烘干(gan), 粉(fen)煤灰(hui)在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)板(ban)(ban)下不(bu)斷抄(chao)起、散落(luo)呈螺旋(xuan)行(xing)(xing)進(jin)式(shi)實(shi)現(xian)熱交換(huan)，物料(liao)(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)另(ling)一(yi)端(duan)進(jin)入中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)，進(jin)行(xing)(xing)逆流烘干(gan)，物料(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)斷地被(bei)反復揚進(jin)，呈進(jin)兩步退一(yi)步的(de)(de)行(xing)(xing)進(jin)方式(shi)，物料(liao)(liao)(liao)(liao)在(zai)(zai)中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)既充(chong)(chong)分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)散發的(de)(de)熱量，又(you)吸收中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)的(de)(de)熱量，同時(shi)又(you)延(yan)長(chang)了干(gan)燥(zao)(zao)時(shi)間，物料(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)達(da)到(dao)(dao)干(gan)燥(zao)(zao)狀態。物料(liao)(liao)(liao)(liao)行(xing)(xing)至中層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)另(ling)一(yi)端(duan)而落(luo)入外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)，物料(liao)(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)內(nei)呈矩(ju)形多回路方式(shi)行(xing)(xing)進(jin)，達(da)到(dao)(dao)干(gan)燥(zao)(zao)效果的(de)(de)物料(liao)(liao)(liao)(liao)在(zai)(zai)熱風作(zuo)用下快(kuai)速行(xing)(xing)進(jin)排出(chu)滾(gun)筒(tong)(tong)(tong)，沒有達(da)到(dao)(dao)干(gan)燥(zao)(zao)效果的(de)(de)濕物料(liao)(liao)(liao)(liao)因(yin)自重而不(bu)能快(kuai)速行(xing)(xing)進(jin)，物料(liao)(liao)(liao)(liao)在(zai)(zai)此(ci)矩(ju)形抄(chao)板(ban)(ban)內(nei)進(jin)行(xing)(xing)充(chong)(chong)分干(gan)燥(zao)(zao)，由此(ci)達(da)到(dao)(dao)干(gan)燥(zao)(zao)效果，完成(cheng)干(gan)燥(zao)(zao)過(guo)程。

設(she)備特點

該設備(bei)與其他干燥設備(bei)相比，生(sheng)產能力大，可連續操(cao)作； 結構(gou)簡單，操(cao)作方(fang)便；故障少，維修費(fei)用低；適用范圍(wei)廣，流(liu)體(ti)阻力小，可以用它干燥顆(ke)料狀物料，對(dui)于那些附著性大的物料也很有(you)利；操(cao)作彈性大，生(sheng)產上允(yun)許產品(pin)的流(liu)量有(you)較(jiao)大波動范圍(wei)，不(bu)會(hui)影響產品(pin)的質量；清掃(sao)容易。