Regarding the issue of direct supply of coking wax oil
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The catalytic unit fed directly with coking wax oil cannot achieve heat-fed operation, as the unstable flow rate of the coking wax oil supplied from outside results in significant variations in the properties of the raw material used in the catalytic unit. Do any of the experts have any good suggestions to solve this problem and enable the hot discharge of coking wax oil? Thank you
The flow meter is inaccurate; the instrument needs to be repaired or replaced. Otherwise, it’s impossible to control the amount of material mixed in. Isn’t it required to use hot feed now? This saves energy. Another key point is to ensure that the alkaline nitrogen content in coker wax oil does not exceed 1000, otherwise the catalyst will be affected.
At least one buffer tank with a volume six times that of the coker wax oil collection tank must be installed in the catalytic unit.
Is it feasible to install a buffer tank for the transfer of wax oil from the coking distillation tower? The wax oil from the distillation tower flows under its own pressure into the buffer tank, and the level of wax oil in the tank is controlled via a control valve
Hot feeding is now being implemented; as long as the alkaline nitrogen content in the coker wax oil is well controlled, there should be no major problems. As for the amount to be blended, it needs to be determined based on the design of your facility and your company’s production and operation plans. Regarding the inaccurate flow meters, it would be best if you installed mass flow meters.
Control a certain amount of outward delivery; the rest is directed to the cooling inlet area； Add a raw material buffer tank later to control the raw material ratio!
It’s not that the flow meter is inaccurate; it’s the flow that is unstable. Can the distillation tower feed under its own pressure into the buffer tank, with the wax oil level in the distillation tower being controlled via a control valve? Is this feasible?
In our facility, the coking wax oil is supplied directly to the heavy catalytic reformer; control is achieved through regulating valves installed both in the feed line to the reformer unit and in the pipelines for storing and transporting the material
I have already implemented direct material supply here. The amount of coker wax oil is not very stable, so it’s not possible to accept all of it. You can allow a portion of it to go to the tank area; we will control the amount that enters our facility ourselves
What is the delivery temperature of coker wax oil? Isn’t it rather pointless to just provide direct supply without heat supply?
It is best to have buffering devices on both sides, which can ensure stability of the raw materials