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(shi)燃燒(shao)煤的發電廠(chang)將(jiang)煤磨(mo)成100微(wei)米以下(xia)的煤粉,用(yong)預熱空氣(qi)噴入爐(lu)膛經(jing)燃燒(shao)形成懸浮狀態(tai),產生(sheng)混雜有大(da)量不(bu)燃物的高溫煙氣(qi),經(jing)集塵裝置捕(bu)集就得到了粉煤灰。粉煤灰的化學組(zu)成與粘土質相似,主要成分為(wei)二(er)氧(yang)(yang)化硅、三(san)氧(yang)(yang)化二(er)鋁、三(san)氧(yang)(yang)化二(er)鐵、氧(yang)(yang)化鈣和未燃盡碳。
工作原理
濕(shi)粉煤灰由供料(liao)裝(zhuang)置進(jin)(jin)(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng),實(shi)現順(shun)流(liu)烘干(gan)(gan)(gan)(gan), 粉煤灰在內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(de)抄(chao)板下不斷抄(chao)起、散落呈(cheng)螺旋行(xing)(xing)進(jin)(jin)(jin)(jin)式實(shi)現熱(re)(re)交換,物料(liao)移動至內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)的(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)逆流(liu)烘干(gan)(gan)(gan)(gan),物料(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)不斷地被反復揚(yang)進(jin)(jin)(jin)(jin),呈(cheng)進(jin)(jin)(jin)(jin)兩步退一(yi)步的(de)行(xing)(xing)進(jin)(jin)(jin)(jin)方式,物料(liao)在中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)既充分吸收內(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)散發的(de)熱(re)(re)量,又吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)的(de)熱(re)(re)量,同時又延長了干(gan)(gan)(gan)(gan)燥時間(jian),物料(liao)在此(ci)(ci)達到干(gan)(gan)(gan)(gan)燥狀態。物料(liao)行(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),物料(liao)在外層(ceng)(ceng)(ceng)(ceng)(ceng)滾筒(tong)內(nei)呈(cheng)矩(ju)形(xing)多回路方式行(xing)(xing)進(jin)(jin)(jin)(jin),達到干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo)的(de)物料(liao)在熱(re)(re)風(feng)作(zuo)用(yong)下快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin)排出滾筒(tong),沒(mei)有(you)達到干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo)的(de)濕(shi)物料(liao)因自重而不能(neng)快(kuai)速行(xing)(xing)進(jin)(jin)(jin)(jin),物料(liao)在此(ci)(ci)矩(ju)形(xing)抄(chao)板內(nei)進(jin)(jin)(jin)(jin)行(xing)(xing)充分干(gan)(gan)(gan)(gan)燥,由此(ci)(ci)達到干(gan)(gan)(gan)(gan)燥效(xiao)果(guo)(guo),完成干(gan)(gan)(gan)(gan)燥過(guo)程(cheng)。
設(she)備特(te)點
該設(she)(she)備(bei)與其(qi)他(ta)干燥設(she)(she)備(bei)相比(bi),生(sheng)(sheng)產(chan)(chan)能力大,可連續操(cao)作; 結(jie)構(gou)簡單(dan),操(cao)作方(fang)便;故障少,維修費用(yong)低;適用(yong)范圍廣(guang),流體阻力小,可以用(yong)它干燥顆料狀(zhuang)物料,對(dui)于那些(xie)附著性大的物料也(ye)很有利(li);操(cao)作彈性大,生(sheng)(sheng)產(chan)(chan)上(shang)允(yun)許產(chan)(chan)品的流量有較大波動范圍,不會影響產(chan)(chan)品的質(zhi)量;清掃容易。