631 Rx High Temperature Excursion Flashcards
1.2 IMMEDIATE ACTIONS: 630 HDS UNIT
CCR 1.2.1 - REDUCE 630R0001 Rx inlet temp by placing 60PC0112 Fuel Gas controller in manual at 10% output. ISOLATE burners as necessary to hold fuel gas pressure.
CCR 1.2.2 - REDUCE Fresh Feed rate to the unit immediately.
1.2.3 - IF temperature excursion continues PERFORM the following steps:
CCR/Oper A. DIVERT all Fresh Feed from unit.
CCR/Oper B. CLOSE Fuel Gas control valve and burner cock valves on heater, but leave pilots in service.
CCR/Oper C. SWEEP Rx beds free of hydrocabon with maximum makeup and recycle hydrogen flow.
CCR D. CONTINUE Amine Contactor circulation.
CCR E. MONITOR and control all downstream hydrocarbon vessel levels.
1.3 IMMEDIATE ACTIONS: 631 HDS UNIT
CCR 1.3.1 - REDUCE 631R0003 Rx inlet temperature by placing 61PC0047 Fuel Gas controller in manual at 10% output. ISOLATE burners as necessary to hold fuel gas pressure.
CCR 1.3.2 - REDUCE Fresh Feed rate to the unit immediately.
1.3.3 - IF temperature excursion continues PERFORM the following steps:
CCR/Oper A. DIVERT all Fresh Feed from unit.
CCR/Oper B. CLOSE Fuel Gas control valve and burner isolation valves on heater, but leave pilots in service.
CCR C. SWEEP Rx beds free of hydrocarbon with maximum makeup and recycle hydrogen flow.
CCR D. CONTINUE Amine Contactor circulation.
CCR E. MONITOR and control all downstream hydrocarbon vessel levels.
1.3.4 - IF Rx3 or Rx4 Temperature Excursion caused the SIS to trip, ENSURE the following actions occurred:
CCR/Oper A. ENSURE Fuel Gas Chopper valveS XV5292 AND XV5293 to 61F0002 Heater have tripped.
CCR/Oper B. ENSURE the Renewable Diesel Fresh Feed Chopper valves XV0139 and XV0140 have tripped.
Oper 1.3.5 - IF the excursion continues, ENSURE the SIS has performed the following actions:
Oper A. ENSURE XV5203 Recycle and Makeup Hydrogen Chopper valve has CLOSED.
Oper D. ENSURE 61FV0013 Recycle and Makeup Hydrogen valve has CLOSED.
CCR 1.3.6 - PLACE 61FC0093 Unit Recycle in Cascade to 61LC0023 Feed Surge Drum level to circulate treated feed through Rx Bed for cooling.
Oper B. ENSURE XV5205 Rx Flash Drum vent valve has OPENED.
Oper C. ENSURE XV5207 631 Flash Drum overhead to 630 Contactor Chopper valve has CLOSED.
Oper 1.3.7 - CLEAR 631 Renewable Diesel normal release line with 635 Diesel, by performing the following:
Oper A. NOTIFY Oil movements of intent to clear the 631 Renewable Diesel normal release line with 635 Diesel.
Oper B. LINE UP 635 Diesel to the 631 Normal release line.
Oper C. CLOSE the 631 product release valve to prevent 635 Diesel from backing into the unit.
1.4 SUPPLEMENTAL ACTIONS
CCR/Oper 1.4.1 - NOTIFY FLS of the time we started backflowing 635 Diesel for accounting purposes.
THIS IS THE END OF THE PROCEDURE
