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[Yankee]

We've been experiencing challenges ramping up crude feedrate due to some downstream challenges with the following symptoms:

 

1. The desalted pump suction pressure dropped below the design value, hence low discharge pressure

2. High HFO temperature to the cooling water box

3. Increased pressure at the fractionator overhead.

 

 

We have shut down the plant to run on cold recycle and system depressurised  but challenge resurfaced 8 hrs after heating up at a nominal value. 

The product yield is fine but the inability to ramp up rate has been a concern. What could be the challenge? I will appreciate a good insight into this.