At what temperature below threshold must combustion oil be injected into the regenerator?
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At what temperature below threshold must combustion oil be injected into the regenerator?
It must not be below 400 degrees (the auto-ignition temperature of fuel oil); spraying is possible at temperatures above 400 degrees, as long as the feed is stopped.
As mentioned above, it cannot be lower than 400 degrees.
Injecting combustion oil ensures that the regenerator temperature remains above 400 degrees. After stopping the feed, once it is observed that the temperature of the regenerator drops rapidly, spraying can be carried out; there is no need to wait until it reaches 400 degrees.
During normal production, the amount of raw coke produced is low, which disrupts the heat balance; therefore, it is necessary to inject combustion oil as a supplement. After stopping the feed, it is required that the bed temperature remain above 380; if the actual bed temperature drops, spraying can be carried out
Typical catalytic device oil combustion designs use light diesel, with a auto-ignition temperature of 370 degrees. So it is safer to generally control the injection of combustion oil at temperatures above 400 degrees.
Several conditions for spraying combustion oil: The catalyst must submerge the combustion oil nozzle; the temperature of the catalyst must be higher than its auto-ignition temperature (usually above 380 degrees); the combustion oil must have its water content removed before use; adjustments should be made slowly during use
The poster asked: At what temperature below which should combustion oil be injected in the regenerator? Personally, I wonder what the original poster means by the conditions under which burning fuel must be injected in order to meet the requirements for starting injection in the lift pipe Under such conditions, generally, the regenerator temperature is between 600–650°C, the outlet temperature of the riser is not lower than 500°C, and the riser can meet the requirements for starting up with fuel injection. Otherwise, the regenerator must be fed with combustion oil to raise the bed temperature in order to meet the requirements for starting operation with fuel injection in the riser.
Your topic is too broad – are we talking about the initial startup phase or normal production? Generally, a temperature of over 380 degrees is sufficient. At the beginning of operation, it is also necessary to check whether the amount of fuel stored in the system covers the combustion fuel nozzles; there are many issues related to this! !
At 400 degrees, burning oil can be injected when there is main wind. We’ve flown at a minimum of 385. It’s best not to spray if it gets any lower. Failing to act causes even greater harm. Moreover, when the main wind blows in, the temperature drops too quickly; fuel injection must be done swiftly, and once that moment passes, there’s nothing that can be done.