Analysis of coke oven exhaust gases
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Where is sampling generally done for coke oven exhaust gas? Let’s exchange ideas. :handshake
When conducting the analysis, we take samples from small flues or branch flues
A small flue-like main stream; of course, if interested, samples can be taken at the position across the hole, as this best reflects the combustion conditions
Is the sampling from the fire air representative?
If we only consider the air excess factor, it is of course the smaller flue on the downward side.
The excess air coefficient is generally measured by taking samples from the individual flue ducts or the main flue duct; these are the standard sampling points for testing in our company
I agree with what was said above; our company is the same
What is the difference between a small flue and a branch flue?
At present, our company requires that the exhaust gas from the two outlets on the coke side of the entire furnace be measured on a monthly basis; at the viewing ports, only the exhaust gas from the standard flue is sampled. Generally, the value at the viewing ports should be maintained between 1.15 and 1.25, while it should be around 1.3 to 1.45 at the exhaust gas outlets. A slightly higher value at the exhaust gas outlets helps ensure normal combustion