PDH unit Ruums process regenerative air heater burner ignition control logic

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I have a question for everyone regarding the ignition process of the burners in the regenerative air heater of PDH units using the Rums process. As far as I know, there are two possible arrangements for the burners; taking 8 groups of burners as an example: Option 1: The furnace is equipped with 8 sets of tubular burners plus 1 set of pilot burners. During ignition, the pilot burners are lit first, and then the 8 main burners are ignited one after another. Option 1: The furnace is equipped with 8 sets of tubular burners, each set containing a pilot light ； In the inquiry mode: during ignition, all 8 permanent lights are lit first, which then triggers the ignition of the 8 main burners ； It’s better to light one permanent lamp and then light the corresponding main burner ； Is there anyone familiar with this type of furnace who wants to learn about the combustion control logic? Thank you.