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)燒煤(mei)(mei)的發電廠(chang)將煤(mei)(mei)磨(mo)成100微米以下的煤(mei)(mei)粉,用預(yu)熱空(kong)氣噴入(ru)爐(lu)膛(tang)經(jing)燃(ran)燒形(xing)成懸浮狀態(tai),產生混雜有大量不燃(ran)物的高(gao)溫煙氣,經(jing)集塵裝置捕集就得到了粉煤(mei)(mei)灰。粉煤(mei)(mei)灰的化學組成與(yu)粘土質相似,主要成分為二(er)氧(yang)化硅、三(san)氧(yang)化二(er)鋁、三(san)氧(yang)化二(er)鐵(tie)、氧(yang)化鈣(gai)和未燃(ran)盡碳。
工作原理
濕粉(fen)煤灰由供料(liao)(liao)(liao)(liao)(liao)(liao)裝置(zhi)進(jin)(jin)(jin)(jin)入三層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)內(nei)(nei)層(ceng)(ceng),實現順流烘(hong)干(gan)(gan)(gan)(gan), 粉(fen)煤灰在內(nei)(nei)層(ceng)(ceng)的(de)抄(chao)板(ban)下不斷(duan)抄(chao)起、散(san)落呈螺旋行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)式實現熱交換,物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)移(yi)動至內(nei)(nei)層(ceng)(ceng)的(de)另(ling)一(yi)(yi)端(duan)進(jin)(jin)(jin)(jin)入中層(ceng)(ceng),進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)逆流烘(hong)干(gan)(gan)(gan)(gan),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在中層(ceng)(ceng)不斷(duan)地被反復揚進(jin)(jin)(jin)(jin),呈進(jin)(jin)(jin)(jin)兩步(bu)(bu)退一(yi)(yi)步(bu)(bu)的(de)行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)方(fang)式,物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在中層(ceng)(ceng)既充(chong)分吸收內(nei)(nei)層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)散(san)發(fa)的(de)熱量(liang),又吸收中層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)的(de)熱量(liang),同(tong)時又延長(chang)了干(gan)(gan)(gan)(gan)燥(zao)(zao)時間,物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在此達到干(gan)(gan)(gan)(gan)燥(zao)(zao)狀態。物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)行(xing)(xing)(xing)(xing)(xing)至中層(ceng)(ceng)另(ling)一(yi)(yi)端(duan)而(er)落入外層(ceng)(ceng),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在外層(ceng)(ceng)滾(gun)(gun)筒(tong)(tong)內(nei)(nei)呈矩形多(duo)回(hui)路方(fang)式行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin),達到干(gan)(gan)(gan)(gan)燥(zao)(zao)效(xiao)果(guo)(guo)的(de)物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在熱風作用下快速(su)行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin)排(pai)出滾(gun)(gun)筒(tong)(tong),沒(mei)有達到干(gan)(gan)(gan)(gan)燥(zao)(zao)效(xiao)果(guo)(guo)的(de)濕物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)因自重而(er)不能快速(su)行(xing)(xing)(xing)(xing)(xing)進(jin)(jin)(jin)(jin),物(wu)(wu)料(liao)(liao)(liao)(liao)(liao)(liao)在此矩形抄(chao)板(ban)內(nei)(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)(xing)(xing)(xing)充(chong)分干(gan)(gan)(gan)(gan)燥(zao)(zao),由此達到干(gan)(gan)(gan)(gan)燥(zao)(zao)效(xiao)果(guo)(guo),完成干(gan)(gan)(gan)(gan)燥(zao)(zao)過(guo)程。
設備特點
該設備(bei)與其他干(gan)燥(zao)設備(bei)相比,生產能力(li)大(da),可連續操作; 結構簡(jian)單(dan),操作方便;故(gu)障(zhang)少,維修費用低;適用范圍廣,流(liu)體(ti)阻力(li)小,可以用它干(gan)燥(zao)顆料(liao)狀(zhuang)物料(liao),對于(yu)那(nei)些附著性大(da)的物料(liao)也很有利;操作彈性大(da),生產上(shang)允許產品的流(liu)量(liang)有較(jiao)大(da)波動范圍,不(bu)會影響產品的質量(liang);清掃容易。