Questions regarding exhaust gas boilers
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The combustion temperature of the exhaust gas boiler in the company’s formaldehyde production unit has been reduced from 600 degrees to 400 degrees, while the steam pressure in the steam drum has increased from 0.4 MPa to 0.45 MPa. I would like to know what might be the reasons for this
Do the two occur at the same time? Logically, the two are not caused by the same factor; a decrease in furnace temperature may be due to changes in exhaust gas composition, burner combustion conditions, amount of air used for combustion, etc ； The change in steam pressure is controlled by the pressure control valve at the drum outlet.
It happened at the same time, so it’s strange
Has there been a change in the exhaust gas levels, and is this change due to reduced user demand, which in turn leads to an increase in steam pressure?
It seems there’s no direct relationship between these two; they are separate matters
Neither the concentration nor the flow rate of the exhaust gases has changed
I think the same way; it’s just that the phenomena occur simultaneously, which makes it a bit difficult to explain
It doesn’t matter. If in doubt, post the flowchart
This is strange. Could it be that the water flow rate in the boiler’s circulation system has increased, resulting in more heat being taken away from the boiler and thus an increase in evaporation? I can’t see your PID, so I can only guess.