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)煤的發電(dian)廠將(jiang)煤磨(mo)成100微(wei)米以下的煤粉,用預(yu)熱空(kong)氣噴(pen)入爐膛經燃(ran)燒(shao)形成懸浮狀態,產生(sheng)混雜有大(da)量不燃(ran)物(wu)的高(gao)溫(wen)煙氣,經集塵(chen)裝置捕(bu)集就得到(dao)了粉煤灰(hui)。粉煤灰(hui)的化學組(zu)成與(yu)粘(zhan)土質(zhi)相(xiang)似,主要成分(fen)為(wei)二氧化硅、三氧化二鋁、三氧化二鐵、氧化鈣和未燃(ran)盡(jin)碳。
工作(zuo)原理
濕粉(fen)(fen)煤灰(hui)由(you)供料裝(zhuang)置(zhi)進(jin)(jin)入三層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒的(de)(de)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),實現(xian)順流(liu)烘干(gan)(gan), 粉(fen)(fen)煤灰(hui)在(zai)(zai)內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)抄(chao)板下不斷抄(chao)起、散落呈(cheng)(cheng)螺旋行(xing)進(jin)(jin)式實現(xian)熱(re)交換,物(wu)料移動至內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)的(de)(de)另(ling)一端進(jin)(jin)入中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),進(jin)(jin)行(xing)逆流(liu)烘干(gan)(gan),物(wu)料在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)不斷地被反復揚進(jin)(jin),呈(cheng)(cheng)進(jin)(jin)兩步(bu)退一步(bu)的(de)(de)行(xing)進(jin)(jin)方式,物(wu)料在(zai)(zai)中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)既(ji)充(chong)分吸收內(nei)(nei)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒散發(fa)的(de)(de)熱(re)量,又吸收中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒的(de)(de)熱(re)量,同時又延長了(le)干(gan)(gan)燥時間(jian),物(wu)料在(zai)(zai)此(ci)達到(dao)(dao)干(gan)(gan)燥狀(zhuang)態。物(wu)料行(xing)至中(zhong)(zhong)層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)另(ling)一端而落入外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng),物(wu)料在(zai)(zai)外層(ceng)(ceng)(ceng)(ceng)(ceng)(ceng)滾(gun)(gun)(gun)筒內(nei)(nei)呈(cheng)(cheng)矩形(xing)多回路方式行(xing)進(jin)(jin),達到(dao)(dao)干(gan)(gan)燥效果(guo)(guo)的(de)(de)物(wu)料在(zai)(zai)熱(re)風作用下快(kuai)速(su)(su)行(xing)進(jin)(jin)排出滾(gun)(gun)(gun)筒,沒有(you)達到(dao)(dao)干(gan)(gan)燥效果(guo)(guo)的(de)(de)濕物(wu)料因自(zi)重而不能快(kuai)速(su)(su)行(xing)進(jin)(jin),物(wu)料在(zai)(zai)此(ci)矩形(xing)抄(chao)板內(nei)(nei)進(jin)(jin)行(xing)充(chong)分干(gan)(gan)燥,由(you)此(ci)達到(dao)(dao)干(gan)(gan)燥效果(guo)(guo),完成干(gan)(gan)燥過程。
設備特點(dian)
該設(she)備與其(qi)他(ta)干燥(zao)設(she)備相(xiang)比(bi),生產能力大(da),可(ke)連續操(cao)作; 結構簡單,操(cao)作方(fang)便;故障少,維(wei)修(xiu)費用(yong)低;適用(yong)范圍廣,流(liu)體阻力小(xiao),可(ke)以(yi)用(yong)它干燥(zao)顆料狀物(wu)料,對于那些附著性(xing)大(da)的物(wu)料也很有(you)利(li);操(cao)作彈性(xing)大(da),生產上允(yun)許(xu)產品的流(liu)量有(you)較大(da)波動范圍,不(bu)會影響產品的質量;清(qing)掃(sao)容易(yi)。