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(de)發電廠(chang)將煤磨(mo)成(cheng)100微(wei)米以下的(de)煤粉(fen)，用(yong)預(yu)熱(re)空氣噴入(ru)爐膛經(jing)燃(ran)燒(shao)形成(cheng)懸浮狀態，產生混雜有(you)大(da)量不燃(ran)物的(de)高溫煙氣，經(jing)集塵裝置(zhi)捕集就得到(dao)了粉(fen)煤灰。粉(fen)煤灰的(de)化(hua)(hua)學組成(cheng)與(yu)粘(zhan)土質相似，主(zhu)要成(cheng)分(fen)為二氧(yang)化(hua)(hua)硅、三氧(yang)化(hua)(hua)二鋁、三氧(yang)化(hua)(hua)二鐵、氧(yang)化(hua)(hua)鈣和(he)未燃(ran)盡(jin)碳。

工(gong)作原理

濕粉煤灰由供(gong)料(liao)裝置進(jin)(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的內(nei)層(ceng)(ceng)(ceng)(ceng),實現順流(liu)烘干(gan)(gan), 粉煤灰在(zai)(zai)內(nei)層(ceng)(ceng)(ceng)(ceng)的抄(chao)板(ban)下(xia)(xia)不斷抄(chao)起、散落呈螺旋行(xing)(xing)進(jin)(jin)(jin)式實現熱交換，物(wu)料(liao)移動(dong)至內(nei)層(ceng)(ceng)(ceng)(ceng)的另(ling)一端進(jin)(jin)(jin)入中(zhong)層(ceng)(ceng)(ceng)(ceng)，進(jin)(jin)(jin)行(xing)(xing)逆流(liu)烘干(gan)(gan)，物(wu)料(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)不斷地被反復揚進(jin)(jin)(jin)，呈進(jin)(jin)(jin)兩步退一步的行(xing)(xing)進(jin)(jin)(jin)方式，物(wu)料(liao)在(zai)(zai)中(zhong)層(ceng)(ceng)(ceng)(ceng)既充分(fen)吸收(shou)內(nei)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發的熱量，又(you)吸收(shou)中(zhong)層(ceng)(ceng)(ceng)(ceng)滾筒(tong)的熱量，同時又(you)延長了干(gan)(gan)燥時間，物(wu)料(liao)在(zai)(zai)此達(da)到(dao)干(gan)(gan)燥狀態(tai)。物(wu)料(liao)行(xing)(xing)至中(zhong)層(ceng)(ceng)(ceng)(ceng)另(ling)一端而(er)(er)落入外層(ceng)(ceng)(ceng)(ceng)，物(wu)料(liao)在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈矩形(xing)多回路(lu)方式行(xing)(xing)進(jin)(jin)(jin)，達(da)到(dao)干(gan)(gan)燥效(xiao)(xiao)果(guo)的物(wu)料(liao)在(zai)(zai)熱風作用下(xia)(xia)快速行(xing)(xing)進(jin)(jin)(jin)排(pai)出滾筒(tong)，沒(mei)有達(da)到(dao)干(gan)(gan)燥效(xiao)(xiao)果(guo)的濕物(wu)料(liao)因自重而(er)(er)不能快速行(xing)(xing)進(jin)(jin)(jin)，物(wu)料(liao)在(zai)(zai)此矩形(xing)抄(chao)板(ban)內(nei)進(jin)(jin)(jin)行(xing)(xing)充分(fen)干(gan)(gan)燥，由此達(da)到(dao)干(gan)(gan)燥效(xiao)(xiao)果(guo)，完成干(gan)(gan)燥過程。

設備特(te)點(dian)

該(gai)設備(bei)與其他干(gan)燥設備(bei)相比，生產(chan)能力大，可連續操(cao)(cao)作； 結構簡單，操(cao)(cao)作方便；故障少，維修費用(yong)(yong)低；適用(yong)(yong)范圍(wei)廣(guang)，流(liu)體阻力小，可以用(yong)(yong)它干(gan)燥顆料狀物料，對于那些附著性大的物料也很(hen)有(you)利；操(cao)(cao)作彈性大，生產(chan)上允許產(chan)品(pin)(pin)的流(liu)量有(you)較(jiao)大波動(dong)范圍(wei)，不會影(ying)響產(chan)品(pin)(pin)的質量；清掃(sao)容易。