One point of the regenerator lean-phase temperature is too high
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A high point is above the external heat exchanger (high in both the lower and upper parts of the dilute phase). Both the fluidization air and the lifting air are pressurized air. If the main air flow is reduced slightly, the temperature will rise due to incomplete combustion inside the regenerator; as a result, the oxygen content in the flue gas of this device is on the high side. Do any of the teachers have any good suggestions???????????????????????? (Recently, we haven’t been using any oxidizers)
It is estimated that if the temperature is accurate, the probability of flow deviation inside the regenerator is high
It’s more likely that the upward flow of air from the external heat exchanger leads to partial afterburning in the dilute-phase region; since the temperature inside the external heat exchanger is low, there must be catalyst that has not been fully burned, resulting in localized afterburning.
Check whether the pressure drop of the external heat extraction slide valve is normal; it seems that heat extraction is not functioning properly, with the main air entering the regenerative dilute phase directly through the channel formed by external heat extraction
Without a spool valve! We use a pneumatically controlled series configuration; the air used for external fluidization and lifting is all pressurized air, with a pressure about 0.11 MPa higher than that in the regenerator. It’s inevitable that channels will form in this case. . Are there any good suggestions?
This is because the lift air flow isn’t adjusted properly, which has caused cross-air flow. It is recommended that you first reduce the lift air flow slightly to see if the phenomenon you mentioned occurs!