Catalytic secondary combustion
Thread Content
It catalyzes secondary combustion; after adding an oxidizer, some sources suggest reducing the main air flow while others recommend increasing it. How exactly should it be adjusted?
The so-called secondary combustion refers to the fact that the material that should have burned extensively in the burning tank is carried to the dilute-phase section for combustion, resulting in extremely high temperatures in that section. Adding an oxidizer is the fastest method, but the operation should first be adjusted to increase the coking intensity of the coking tank. Adding an oxidizer increases the main air flow or not depends on the oxygen content in the regenerator; if the oxygen content is low, the main air flow can be increased.
Reduced air flow lowers the oxygen content, resulting in a diminished charring effect and intensified afterburning.
It depends on whether it is fully regenerated. In complete regeneration, secondary combustion occurs as a result of increasing the main air flow, raising the temperature of the regeneration bed, and adding combustion aids; in incomplete regeneration, secondary combustion happens by reducing the main air flow and lowering the excess oxygen content in the flue gases to prevent further combustion of CO
I couldn’t see the title clearly; adding an oxidizer means achieving complete regeneration by increasing the supply of air
It is recommended that the original poster clearly describe the specific form of the device when posting the topic, so that it will be easier for others to help analyze the problem! There is a very crucial factor in this topic, namely the method of regenerating the device; it can be seen that some users have already conducted analyses based on specific situations, indicating that someone has indeed paid attention to this issue!
Since an oxidizer has been added, it should be fully regenerated, commonly known as oxygen enrichment. Increasing the main air flow after adding an oxidizer raises the oxygen content ； Increase the regenerator pressure to boost coking intensity ； In the case of incomplete regeneration, secondary combustion occurs due to high oxygen levels; it is necessary to reduce the main air flow. However, it is important to monitor the color of the regenerant constantly to prevent the formation of carbon deposits as a result of excessive reduction in air flow.
Everyone has explained things quite clearly; the addition of an oxidizer mainly enhances the capability for oxygen-enriched regeneration. Secondly, the oxygen content at the top of the regenerator is important – a level below 1.0% can easily lead to backburning in the flue, as well as an increase in the temperature of the flue gas at the inlet of the exhaust fan, which requires an increase in the main air supply.
What oxygen level do you control? Determine whether the main air supply is insufficient based on the oxygen content analysis.