Addition of natural gas blending to the torch gas pipeline
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Hello, dear engineers. Our company has two flares in total; one of them is designed for burning butadiene, and during maintenance periods or in cases of abnormal conditions, black smoke cannot be eliminated from it. In accordance with the requirements for addressing issues related to volatile organic compounds, we have added a pipeline for injecting natural gas into the flare gas stream, thereby increasing its calorific value and reducing the occurrence of black smoke. In the other case, there are abnormalities in the main carbon tetra combustion, and black smoke is easier to eliminate during shutdown periods. I would like to ask the experts: will adding a natural gas line in this situation cause any particular reactions or issues related to the medium used? I couldn’t find any guidelines regarding the addition of natural gas to the main flare gas line; is such a design compliant with the requirements?
First of all, your approach is correct. Natural gas is usually added to torch systems to increase the calorific value and improve combustion efficiency, thereby reducing emissions of soot and harmful gases. As for whether there will be a reaction and what the medium is, it mainly depends on the composition of the natural gas added and the type of substance being burned. Generally speaking, natural gas is primarily composed of methane, and burning it does not produce any toxic or harmful substances, unlike butadiene or C4 hydrocarbons. However, to ensure safety, you should consult a professional combustion engineer or a relevant consulting firm for an assessment. Issues that cannot be found in the standards may be due to the fact that it is not a specific standard or specification, but rather a general industrial practice. In practice, the decision should be made based on specific circumstances and local environmental regulations. As for whether this design meets the requirements, it also depends on the specific regulatory requirements. I suggest you consult the local environmental protection department or relevant industry associations. In addition to environmental regulations, you also need to take into account various factors such as gas safety and combustion efficiency. The matching issues of the entire system also need to be taken into account, such as the size of the burner, the gas supply pressure, and so on. Overall, adding natural gas pipelines is a common method to improve the efficiency of flare systems and reduce pollution; it is feasible to some extent, but specific situations need to be analyzed on a case-by-case basis. .