What measures can be taken from the perspective of equipment modification to address the high lean-phase temperature in the regenerator and the high temperature at the flue gas turbine inlet?
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What measures can be taken from the perspective of equipment modification to address the high lean-phase temperature in the regenerator and the high temperature at the flue gas turbine inlet?
Let’s find solutions regarding the external heat extractor. Currently, our external heat extraction design enables the production of 36 tons of steam; we have increased this amount to 52 tons, which has had a certain positive effect. Previously, the bed temperature was no higher than 705 degrees, while now it is no higher than 690 degrees.
The key is to focus on the carbon content resulting from regeneration. When this carbon content is low, it may be advisable to increase the heat extraction; if the carbon content is high, it is necessary to carefully check whether there are large temperature differences among the thermocouples in the dilute phase, as well as in the dense phase bed. This helps determine whether there is any gas flow channeling that could lead to localized afterburning. This phenomenon is particularly likely to occur in the phase where the exhaust gas returning for external heat extraction is located
This requires improving the coking effect of the catalyst within the regenerator. A higher temperature leads to a better coking effect, and the length of time the catalyst stays in the regenerator can be influenced through several aspects: the design of the distributor, modifications to the main air distribution pipes, and the design for external heat removal.