Adjustment of the pneumatically controlled external heat exchanger
Thread Content
Recently, the fluidization condition in the external heat exchanger has been poor. The flow rates of the air used for fluidization have been increased to high levels; according to the design parameters, these flow rates should be sufficient to increase the steam production. However, the steam production still doesn’t increase. Judging from the temperatures at various points in the external heat exchanger, it is clear that fluidization is not proper, but it’s not clear what adjustments can be made to restore good fluidization conditions.
Find the design specification and adjust it again according to the airflow requirement he specified
Proper control of the lift wind and the loosening wind is essential: the loosening wind ensures uniform fluidization of heat absorption from the outside, preventing any uneven flow, while the lift wind ensures that the catalyst from which heat is absorbed is lifted back to the regenerator
Remove the catalyst from the bottom discharge point by extracting heat from the outside.
The air volume and steam generation rate are directly proportional within a certain range, but they become inversely proportional after passing the inflection point. I suggest you lower the air volume first, and then adjust it gradually.
Assuming the equipment is in good condition, check the main air flow rate and the density of the slurry bed; if there is enough headroom, increasing the main air flow rate and reducing the slurry bed density might be effective.