For low-nitrogen burners such as heat transfer oil furnaces, should gas control be set at the lower or upper explosion limit?
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As the title suggests, heat transfer oil furnaces use low-nitrogen combustion; to ensure compliance with environmental emission standards, the oxygen content should generally be ≤3.5%； This concentration is controlled by adjusting the amount of air supplied, given a fixed amount of fuel gas. Question: 1. In the presence of an open flame, will an explosion occur if the concentration of the gas itself is within its explosive range? 2. In the event of an explosion, should it be the upper limit or the lower limit that is controlled?
In reality, it is often difficult to maintain an oxygen level of 3.5% in the exhaust gases; conversion is necessary during actual testing
Here, the exhaust gas intake rate is controlled at 1.8%, while the exhaust gas output rate is around 2.8–3.5. Once it exceeds 3%, the environmental compliance values increase.
Yes, this is the issue of conversion I’m talking about. Do you have any online monitoring systems on the chimneys?
It is necessary, **required for EPA monitoring; real-time data across the entire network.
What brand of burner are you using? Is FGR present?