Coking problem in the large oil and gas pipelines of catalytic cracking units
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Are there any better methods than hydraulic coking removal for dealing with coking in the large oil and gas pipelines of catalytic cracking units? Because our device pipelines are lined. Also, is it feasible to use an auxiliary combustion chamber for sulfiding and charring? If it’s feasible, what is the specific method?
It should not be feasible; the heat value generated by combustion in the combustion chamber is lost almost entirely by the time it reaches the oil and gas pipelines. Haven’t heard of it either; I’d appreciate your insights.
If the coking in large oil and gas pipelines could be treated using a method similar to that of coking in coke ovens, there would be absolutely no need to use auxiliary combustion chambers. A temporary solution can solve the problem. The problem is that the linings of the large oil and gas pipelines in the cold wall may not be able to withstand the temperatures caused by burning.
The method I use involves installing manholes at the top, bottom, and horizontal sections of the oil and gas riser. During the burning process, the manhole at the top is opened, and a fuel injector is used to spray fuel from the manhole at the bottom of the riser, thereby facilitating the burning process. The manholes are then covered to control the amount of air flowing in (natural wind), thus keeping the burning temperature below 750 degrees. The challenge lies in carefully controlling the temperature at the site of ignition; if it gets too high, the lining could be damaged. We mainly monitor the amount of smoke coming out of the manhole at the top, and use an infrared thermometer to check the temperature at the site of ignition, ensuring that the temperature of the oil and gas pipelines remains below 100 degrees.