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傳(chuan)統的蓄(xu)(xu)熱(re)(re)燃燒(shao)(shao)(shao)方(fang)(fang)(fang)式(shi)(shi)(shi)(shi)為(wei)切換式(shi)(shi)(shi)(shi),也叫脈沖式(shi)(shi)(shi)(shi)燃燒(shao)(shao)(shao)。其與傳(chuan)統的冷空氣助(zhu)燃方(fang)(fang)(fang)式(shi)(shi)(shi)(shi)相比,能節約50%以上的燃料,但在使(shi)用過程中也發現了一些問題。由于脈沖式(shi)(shi)(shi)(shi)蓄(xu)(xu)熱(re)(re)燃燒(shao)(shao)(shao)方(fang)(fang)(fang)式(shi)(shi)(shi)(shi)要換向(xiang)(xiang)蓄(xu)(xu)熱(re)(re),所(suo)以燃燒(shao)(shao)(shao)器必須(xu)成(cheng)對出現,不管脈沖式(shi)(shi)(shi)(shi)燃燒(shao)(shao)(shao)方(fang)(fang)(fang)式(shi)(shi)(shi)(shi)的換向(xiang)(xiang)時間(jian)如何設置,只要存在換向(xiang)(xiang),就會造成(cheng)爐(lu)溫波動(dong)和爐(lu)壓(ya)波動(dong),同時換向(xiang)(xiang)瞬(shun)間(jian)也造成(cheng)燃燒(shao)(shao)(shao)不連(lian)續,這些因素都直接影響燃燒(shao)(shao)(shao)質量。 隨(sui)著(zhu)蓄(xu)(xu)熱(re)(re)技術的不斷發展(zhan),連(lian)續式(shi)(shi)(shi)(shi)蓄(xu)(xu)熱(re)(re)燃燒(shao)(shao)(shao)技術在工業上的運(yun)用也越(yue)(yue)來越(yue)(yue)多。連(lian)續式(shi)(shi)(shi)(shi)高溫空氣燃燒(shao)(shao)(shao)系(xi)統中使(shi)用連(lian)續回(hui)轉式(shi)(shi)(shi)(shi)蓄(xu)(xu)熱(re)(re)器,助(zhu)燃空氣及(ji)煙(yan)氣均不需(xu)要換向(xiang)(xiang),整個系(xi)統連(lian)續運(yun)行。圖為(wei)旋轉式(shi)(shi)(shi)(shi)蓄(xu)(xu)熱(re)(re)燃燒(shao)(shao)(shao)器示意圖。
燒(shao)嘴運行時,爐膛煙(yan)(yan)氣(qi)經(jing)(jing)旋轉(zhuan)轉(zhuan)子內的(de)(de)(de)蓄(xu)熱(re)(re)(re)體(ti)被(bei)排(pai)煙(yan)(yan)風機吸出,蓄(xu)熱(re)(re)(re)體(ti)同時儲(chu)蓄(xu)熱(re)(re)(re)量。換熱(re)(re)(re)器的(de)(de)(de)傳動部分將蓄(xu)熱(re)(re)(re)室按一定角度旋轉(zhuan),已蓄(xu)熱(re)(re)(re)的(de)(de)(de)蓄(xu)熱(re)(re)(re)體(ti)轉(zhuan)到(dao)助(zhu)(zhu)燃空(kong)(kong)氣(qi)側(ce)時,冷(leng)(leng)的(de)(de)(de)助(zhu)(zhu)燃空(kong)(kong)氣(qi)經(jing)(jing)過蓄(xu)熱(re)(re)(re)體(ti)被(bei)加熱(re)(re)(re),同時蓄(xu)熱(re)(re)(re)體(ti)被(bei)冷(leng)(leng)卻。冷(leng)(leng)卻后的(de)(de)(de)蓄(xu)熱(re)(re)(re)體(ti)又(you)轉(zhuan)到(dao)廢(fei)氣(qi)側(ce),蓄(xu)熱(re)(re)(re)體(ti)再次(ci)被(bei)煙(yan)(yan)氣(qi)加熱(re)(re)(re),如此連續不斷(duan)地加熱(re)(re)(re)助(zhu)(zhu)燃空(kong)(kong)氣(qi),從而向燒(shao)嘴不間斷(duan)地供(gong)給熱(re)(re)(re)空(kong)(kong)氣(qi) 。廣(guang)東堅(jian)美鋁型材廠對使用脈沖式蓄熱燃燒方式和連續式蓄熱燃燒方式進行了技術參數比較,發現使用連續式蓄熱燃燒方式的其熔化速度提高了8.8%,可見連續式蓄熱燃燒方式有效解決了爐壓波動及燒嘴換向帶來的能耗損失。
文章源自網絡