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(ta)是燃燒(shao)煤(mei)的(de)發電廠將煤(mei)磨成100微米以下的(de)煤(mei)粉,用預(yu)熱空氣(qi)噴入爐膛(tang)經(jing)燃燒(shao)形(xing)成懸浮狀態(tai),產生混(hun)雜有大量不(bu)燃物的(de)高(gao)溫煙氣(qi),經(jing)集(ji)塵裝置捕集(ji)就得到了粉煤(mei)灰。粉煤(mei)灰的(de)化(hua)(hua)學組成與粘土質相似,主要成分(fen)為二(er)(er)氧(yang)化(hua)(hua)硅、三氧(yang)化(hua)(hua)二(er)(er)鋁、三氧(yang)化(hua)(hua)二(er)(er)鐵、氧(yang)化(hua)(hua)鈣和(he)未(wei)燃盡(jin)碳。
工作原(yuan)理
濕粉(fen)(fen)煤(mei)灰由(you)供料(liao)(liao)裝置(zhi)進(jin)(jin)(jin)入(ru)三層(ceng)(ceng)滾(gun)(gun)筒的內(nei)層(ceng)(ceng),實現(xian)順(shun)流(liu)(liu)烘(hong)干(gan), 粉(fen)(fen)煤(mei)灰在內(nei)層(ceng)(ceng)的抄(chao)(chao)板下(xia)不斷抄(chao)(chao)起、散落呈螺旋行(xing)(xing)進(jin)(jin)(jin)式實現(xian)熱(re)(re)交換,物(wu)料(liao)(liao)移動至(zhi)內(nei)層(ceng)(ceng)的另一端進(jin)(jin)(jin)入(ru)中(zhong)(zhong)層(ceng)(ceng),進(jin)(jin)(jin)行(xing)(xing)逆流(liu)(liu)烘(hong)干(gan),物(wu)料(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)不斷地(di)被反復揚進(jin)(jin)(jin),呈進(jin)(jin)(jin)兩步(bu)退一步(bu)的行(xing)(xing)進(jin)(jin)(jin)方式,物(wu)料(liao)(liao)在中(zhong)(zhong)層(ceng)(ceng)既充(chong)分吸(xi)收(shou)內(nei)層(ceng)(ceng)滾(gun)(gun)筒散發的熱(re)(re)量(liang),又(you)吸(xi)收(shou)中(zhong)(zhong)層(ceng)(ceng)滾(gun)(gun)筒的熱(re)(re)量(liang),同時(shi)又(you)延長了干(gan)燥時(shi)間,物(wu)料(liao)(liao)在此達到干(gan)燥狀態。物(wu)料(liao)(liao)行(xing)(xing)至(zhi)中(zhong)(zhong)層(ceng)(ceng)另一端而落入(ru)外層(ceng)(ceng),物(wu)料(liao)(liao)在外層(ceng)(ceng)滾(gun)(gun)筒內(nei)呈矩(ju)形多回路方式行(xing)(xing)進(jin)(jin)(jin),達到干(gan)燥效果的物(wu)料(liao)(liao)在熱(re)(re)風作用下(xia)快速行(xing)(xing)進(jin)(jin)(jin)排出滾(gun)(gun)筒,沒有達到干(gan)燥效果的濕物(wu)料(liao)(liao)因自重而不能快速行(xing)(xing)進(jin)(jin)(jin),物(wu)料(liao)(liao)在此矩(ju)形抄(chao)(chao)板內(nei)進(jin)(jin)(jin)行(xing)(xing)充(chong)分干(gan)燥,由(you)此達到干(gan)燥效果,完成干(gan)燥過程。
設(she)備特點(dian)
該設(she)備與(yu)其他(ta)干燥設(she)備相(xiang)比,生產(chan)能力大,可連(lian)續操(cao)作; 結構簡單(dan),操(cao)作方便;故障少,維修(xiu)費(fei)用(yong)低;適(shi)用(yong)范(fan)圍廣,流體(ti)阻力小,可以用(yong)它(ta)干燥顆料(liao)狀(zhuang)物料(liao),對于(yu)那些附著性大的(de)物料(liao)也很有利;操(cao)作彈(dan)性大,生產(chan)上允許產(chan)品的(de)流量有較(jiao)大波動范(fan)圍,不會影響產(chan)品的(de)質量;清掃容(rong)易。