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)煤的發電廠(chang)將(jiang)煤磨成100微米以(yi)下的煤粉，用預(yu)熱(re)空氣噴入爐膛(tang)經燃(ran)燒(shao)形成懸浮狀(zhuang)態(tai)，產(chan)生混雜有大量不燃(ran)物的高溫(wen)煙氣，經集(ji)塵裝置捕集(ji)就得到(dao)了粉煤灰。粉煤灰的化學組成與(yu)粘土質(zhi)相似(si)，主要成分為二氧化硅、三氧化二鋁、三氧化二鐵、氧化鈣(gai)和未燃(ran)盡碳(tan)。

工作原理

濕(shi)粉(fen)煤(mei)灰由供料(liao)(liao)(liao)裝置進(jin)(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)(de)(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng),實現(xian)(xian)順流烘干(gan), 粉(fen)煤(mei)灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)(de)抄板下不斷抄起、散(san)落呈(cheng)(cheng)(cheng)螺旋(xuan)行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)式實現(xian)(xian)熱(re)交換，物(wu)(wu)料(liao)(liao)(liao)移動至內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)(de)(de)另一(yi)端進(jin)(jin)(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)逆流烘干(gan)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不斷地被反復揚進(jin)(jin)(jin)(jin)，呈(cheng)(cheng)(cheng)進(jin)(jin)(jin)(jin)兩步(bu)退一(yi)步(bu)的(de)(de)(de)(de)行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)方式，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒散(san)發的(de)(de)(de)(de)熱(re)量，又吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒的(de)(de)(de)(de)熱(re)量，同時又延長了干(gan)燥(zao)時間，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此達(da)到(dao)干(gan)燥(zao)狀態。物(wu)(wu)料(liao)(liao)(liao)行(xing)(xing)(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)另一(yi)端而落入(ru)外層(ceng)(ceng)(ceng)(ceng)(ceng)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)筒內(nei)呈(cheng)(cheng)(cheng)矩形(xing)多回路方式行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)，達(da)到(dao)干(gan)燥(zao)效(xiao)果的(de)(de)(de)(de)物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)熱(re)風作用下快速行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)排出滾(gun)筒，沒有達(da)到(dao)干(gan)燥(zao)效(xiao)果的(de)(de)(de)(de)濕(shi)物(wu)(wu)料(liao)(liao)(liao)因自(zi)重而不能快速行(xing)(xing)(xing)進(jin)(jin)(jin)(jin)，物(wu)(wu)料(liao)(liao)(liao)在(zai)(zai)此矩形(xing)抄板內(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)充分干(gan)燥(zao)，由此達(da)到(dao)干(gan)燥(zao)效(xiao)果，完成干(gan)燥(zao)過(guo)程。

設備特點

該設備(bei)與其他(ta)干(gan)燥(zao)設備(bei)相比，生(sheng)產(chan)能(neng)力大，可(ke)連續操(cao)作； 結構(gou)簡單，操(cao)作方便；故障少，維修費(fei)用低；適用范圍廣，流(liu)體阻力小，可(ke)以用它干(gan)燥(zao)顆料狀物料，對(dui)于那些附著(zhu)性大的物料也(ye)很(hen)有利；操(cao)作彈(dan)性大，生(sheng)產(chan)上允許產(chan)品的流(liu)量有較(jiao)大波動范圍，不會影響產(chan)品的質量；清(qing)掃容易。