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北京市某单位在2005年安装了6台DTG-320-20Eco.Nox型大气混燃落地式铸铁热水锅炉,安装后厂家安装调试均正常。但2006年2月编号为219和220的2台锅炉出现了异常。在燃烧过程中发生劈啪的异常响声,随即停止锅炉运行,并通知锅炉厂家到现场检查。检查发现燃烧器喷管出现程度不同的局部变色:2台锅炉中仅存5根燃烧器喷管可以继续使用,其余燃烧器喷管都在距离根部10~20mm的位置处出现裂纹或缺口。该锅炉房高度5.5m,锅炉房的大门的墙壁上开2扇窗户。距离地平面高度约为3.5m。每扇窗户的尺寸约为2×1.5m,可通风的面积为1.0m~2。2扇窗户中有1个排风扇,直径约为50mm。锅炉房左侧墙壁有2个距离地面约为4m的百叶窗的风口。面积约为0.8m~2。剩
A unit in Beijing in 2005 installed six DTG-320-20Eco.Nox atmospheric mixing floor-standing cast iron hot water boiler, installation and installation of the factory after installation are normal. However, two boilers Nos. 219 and 220 of February 2006 showed anomalies. In the combustion process crackling abnormal noise, then stop the boiler operation, and notify the boiler manufacturer to the scene inspection. Check the burner discoloration found different degrees of local discoloration: two boilers only five burner nozzle can continue to use, the remaining burner nozzle at a distance of 10 ~ 20mm from the root of cracks or gaps. The height of the boiler room 5.5m, the boiler room door 2 windows on the wall. The height from the ground level is about 3.5m. The size of each window is about 2 × 1.5m, the area of ventilation is 1.0m ~ 2.2 There is a fan in the window, the diameter is about 50mm. On the left side of the boiler room, there are two openings for shutters with a floor area of about 4m. The area is about 0.8m ~ 2. Left