Is it practically meaningful to have interlock trips based on flow rate and density settings in the pulverized coal gasification process?
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Is it practically meaningful to have interlock trips based on flow rate and density settings in the pulverized coal gasification process? Once there are fluctuations in the coal flow rate, the flow volume decreases, which leads to a high oxygen-to-coal ratio and thus a shutdown of the system. Then why is it still necessary to control the flow rate and density of the pulverized coal?
My understanding is that the coal powder flow rate is not easy to measure; accurately determining the flow velocity and density of the coal powder helps to obtain a more precise value for its flow rate. The oxygen-to-coal ratio is calculated based on this flow rate. Since the measurement of coal powder flow rate isn’t very accurate, these additional parameters of flow velocity and density are used as a safety measure. I’m not sure if this approach is correct; those who are more knowledgeable please add to this explanation
It relates to the combustion efficiency, system stability, and safe operation.
I’m not familiar with this chain, but coal powder furnaces use indirect feeding; there is no direct causal relationship between this and the continuity of coal powder delivery. Even if the delivery is interrupted, it’s not necessary to shut down the furnace right away – perhaps there are still dozens of tons of qualified material left in the hoppers that haven’t been fed in yet
Too low a flow rate can cause backflow in the burner, and in severe cases, explosions may occur
It has been forced all the time; I haven’t thrown it once. Personally, I don’t think it makes any sense. I once tried running two coal powder pipelines.