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为了保证在运行状态下的锅炉炉膛有足够空气供给量及合理燃烧,一般的配风工况由炉膛出口过剩空气系数(α_1)来反映。目前,我国普遍采用氧化锆测氧仪来确定锅炉在运行状态下过剩空气系数。实践表明,大中型煤粉炉在一定的过剩空气下,燃料品种对烟气中氧量变化的影响较小。因此,烟气中过剩氧量被用作锅炉燃烧工况监视的一个重要参数,也是锅炉漏风系数最重要的测试数据之一。在同一条件下,对同一种烟气由于烟气成分分析方法及测量仪表的不同,测得的烟气成分在数值上可能有差别,如奥氏分析仪测得烟气中氧量是占“干烟气”的百分含量,而一般氧化锆测氧仪所测定的氧量是占“湿烟气”的百分
In order to ensure that there is sufficient air supply and reasonable combustion in the boiler furnace under normal operating conditions, the general air-conditioning condition is reflected by the excess air coefficient at the outlet of the furnace (α_1). At present, zirconia oxygen analyzer is widely used in our country to determine the excess air coefficient of the boiler in operation. Practice shows that medium and large pulverized coal furnace in a certain excess air, the fuel species on the change in the amount of oxygen in the flue gas smaller. Therefore, the excess oxygen in the flue gas is used as an important parameter to monitor the combustion conditions of the boiler and is also one of the most important test data of the boiler air leakage coefficient. Under the same conditions, for the same flue gas composition analysis methods and instruments due to the different flue gas measured smoke composition may be different in value, such as the austenitic analyzer measured oxygen in the flue gas accounts for “ Dry flue gas ”percentage, while the general determination of zirconia oxygen analyzer oxygen is the percentage of“ wet flue gas ”