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)的(de)發(fa)電廠將(jiang)煤(mei)磨(mo)成100微米以下(xia)的(de)煤(mei)粉,用預熱空氣噴入爐(lu)膛(tang)經燃(ran)燒形(xing)成懸浮狀(zhuang)態,產生混雜(za)有大量不燃(ran)物的(de)高溫煙氣,經集塵(chen)裝(zhuang)置捕(bu)集就(jiu)得到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)學組成與粘土(tu)質(zhi)相(xiang)似,主(zhu)要成分為二(er)氧(yang)(yang)(yang)(yang)化(hua)硅、三氧(yang)(yang)(yang)(yang)化(hua)二(er)鋁、三氧(yang)(yang)(yang)(yang)化(hua)二(er)鐵、氧(yang)(yang)(yang)(yang)化(hua)鈣和(he)未燃(ran)盡碳。
工作原(yuan)理(li)
濕粉煤(mei)(mei)灰由供料(liao)(liao)裝置進(jin)(jin)入(ru)(ru)(ru)三層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng),實現順流烘干(gan)(gan), 粉煤(mei)(mei)灰在(zai)(zai)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的(de)抄(chao)(chao)(chao)板(ban)(ban)下不斷抄(chao)(chao)(chao)起、散(san)落呈(cheng)螺旋行(xing)進(jin)(jin)式(shi)實現熱交換,物(wu)(wu)料(liao)(liao)移(yi)動至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)的(de)另一端進(jin)(jin)入(ru)(ru)(ru)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)逆流烘干(gan)(gan),物(wu)(wu)料(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)不斷地被反(fan)復揚進(jin)(jin),呈(cheng)進(jin)(jin)兩步退一步的(de)行(xing)進(jin)(jin)方式(shi),物(wu)(wu)料(liao)(liao)在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)既(ji)充分(fen)吸(xi)收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)散(san)發的(de)熱量(liang),又吸(xi)收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)的(de)熱量(liang),同時又延長(chang)了干(gan)(gan)燥時間,物(wu)(wu)料(liao)(liao)在(zai)(zai)此(ci)達(da)到干(gan)(gan)燥狀(zhuang)態。物(wu)(wu)料(liao)(liao)行(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)另一端而(er)落入(ru)(ru)(ru)外(wai)層(ceng)(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)在(zai)(zai)外(wai)層(ceng)(ceng)(ceng)(ceng)滾(gun)筒(tong)內(nei)(nei)呈(cheng)矩形(xing)多回(hui)路(lu)方式(shi)行(xing)進(jin)(jin),達(da)到干(gan)(gan)燥效果的(de)物(wu)(wu)料(liao)(liao)在(zai)(zai)熱風(feng)作用下快速行(xing)進(jin)(jin)排出滾(gun)筒(tong),沒有達(da)到干(gan)(gan)燥效果的(de)濕物(wu)(wu)料(liao)(liao)因(yin)自重而(er)不能快速行(xing)進(jin)(jin),物(wu)(wu)料(liao)(liao)在(zai)(zai)此(ci)矩形(xing)抄(chao)(chao)(chao)板(ban)(ban)內(nei)(nei)進(jin)(jin)行(xing)充分(fen)干(gan)(gan)燥,由此(ci)達(da)到干(gan)(gan)燥效果,完成(cheng)干(gan)(gan)燥過程。
設備特點
該設(she)備與其他干燥設(she)備相比,生產(chan)能(neng)力(li)大(da)(da),可連(lian)續(xu)操作; 結(jie)構簡單,操作方便;故障少(shao),維修費用(yong)低;適用(yong)范(fan)圍廣,流體阻力(li)小,可以用(yong)它干燥顆料狀物料,對于那些附著性大(da)(da)的物料也很(hen)有利;操作彈(dan)性大(da)(da),生產(chan)上允許產(chan)品(pin)的流量有較大(da)(da)波動范(fan)圍,不(bu)會影(ying)響(xiang)產(chan)品(pin)的質量;清掃容易(yi)。