Part 70/72
BPCS 70-11 (Hi-Cal Waste Gas to Flare Control)
Objectives: Prevent stagnation of Hi-Cal header as it is routed to the Flare header
Resulting Actions: High Calorie Waste Gas Divert to Flare Isolation Valve (HV-7029-05) is opened and high Calorie Fuel Gas Purge Valve (HV-7000-01) is opened and nitrogen High Calorie Purge Valve (HV-7000-09) is opened(if needed)
Fooled You!!!
ESS 72-2 (Flare KO Pot Steam Coil Isolation)
Objective: Prevent steam from evaporating all the level out of the Flare KO pot (C-7202). Protect C-7202 vapor space, which may potentially contain EO, against high steam temperature.
Resulting Actions: Forces steam pressure control valve PV-7204-02 closed. Forces steam isolation valve HV-7204-01 closed. .
BPCS 82-15, Bleach Storage Inlet Valve Trip
Objective: Close bleach tank unload valve for high level
Resulting Action: Closes D-8264 bleach tank inlet unload valve (HV-8264-03) at >90%
BPCS 83-15, MP to LP N2 Backflow Protection
OBJECTIVES:
Protect against backflow from the LP N2 system into the MP N2 system.
RESULTING ACTIONS : Closes MP to LP letdown valve on low D/P <1psid
BPCS 87-14, Fire Water Pumps Low Pressure Auto Start
OBJECTIVES:
Monitor the pressure on the fire water system and start pumps as the pressure drops below targets.
RESULTING ACTIONS:
starts electric pump, then diesel pumps
ESS 72-4 (Flare Velocity Assist Gas)
Objective:
Increase velocity on flare header to ensure all EO is combusted at flare tip during a EO venting scenario (10ft/sec)
K-6460 trip and C-6404 venting to flare
PSV on C-6404 is relieving (>50psig)
Resulting Actions: Opens Hand Valves HV-7202-08/09 and the nitrogen valve for 10 minutes have trips have re-set(5 min of just nitrogen)
BPCS 81-12 (BFW Pumps Low Pres Start / Low Level Trip)
Objective: Ensure adequate level is present in the De-aerator (C-8108) for the BFW pumps (G-8114/5/6). Auto start BFW pump to maintain header pressure
Resulting Actions: Trip BFW pumps (G-8114/15/16) on low C-8108 level <10% and auto Start BFW pumps (G-8114/15/16) on low discharge pressure <950psig
BPCS 82-14, Sulfuric Acid Storage Inlet Valve Trip
OBJECTIVES:
Close sulfuric acid unload valve for high tank level
RESULTING ACTION:
Close sulfuric acid unload valve (HV-8254-04). at >90%
ESS 83-2, Methane Backflow Prevention
OBJECTIVES: Protect the Methane system from backflow from the process and MP N2 system.
RESULTING ACTIONS:
Closes methane header block valve at <1psid
ESS 87-4 Zone 1-4 Deluge Active
OBJECTIVES:
Activate deluge system zone 1-4 on high LEL conditions (E-6213, E-6202/12, Y-6209/10, C-6211, G-6206/07/14/15)
RESULTING ACTIONS:
Opens HY-8701D-01 Deluge System Zone 1-4.
What are the objectives and resulting actions to BPCS 70-14 (Low Cal Condensate Pumps)
Objectives: Prevent Low Cal KO Pot pumps G-7066/67 from running without liquid suction
Resulting Actions: Pumps are tripped off at <10%
BPCS 81-13 (Feed to Ammonia Tank Hi Level Trip)
Daily Double
Objective: Prevent overfilling of Ammonia tank
Resulting Actions: Closes D-8130 truck unload valve (HV-8130-02). Closes D-8130 truck recovery vent valve (HV-8130-03) >90%
BPCS 82-12, C-8221 Closed Loop Cooling Water Surge Tank High Level Protection
OBJECTIVES:
Close C-8221 CLCW surge tank overhead vent valve to prevent water entering the high calorie waste gas header.
RESULTING ACTIONS:
Closes overhead pressure control valve (PV-8221-02B) on C-8221
ESS 83-7, MP N2 Backflow Prevention
OBJECTIVES: Prevent the Methane header from back flowing into the medium pressure N2 header. To protect the Methane system from overpressure due to excessive N2 flow. .
RESULTING ACTIONS: Closes the MP N2 backup valves on low D/P <1psid or to excess methane pressure TBD
ESS 87-3 Zone 3-1 Deluge Active
OBJECTIVES:
Activate deluge system zone 3-1 (C-6608) when high LEL conditions occur.
RESULTING ACTIONS:
Opens HY-8703A-01 Deluge System Zone 3-1.
BPCS 72-12 (Flare Pilot Automatic Ignition)
Objective: Relight flare pilot #1,#2,#3 if temperature sensors detect a possible outage. Notify operator when a relight is in progress.
Resulting Action: Attempt to re-light flare pilot #1, #2, #3 for 5 continuous minutes, fuel gas pressure between 12-18psig and temp<350F
BPCS 81-14 (HP Cooled Condensate Low Suction Pressure Pump Protection)
Objective: Ensure adequate suction pressure for cooled condensate pumps. Auto start pump if one shuts down
Resulting Actions: Trip High Pressure Condensate pumps (G-8125/26) on low suction pressure <80psig or G-8116/17 are both down . Auto Start High Pressure Condensate pumps (G-8125/26) when one trips
BPCS 82-11, Cooling Water Pumps Auto-Start
OBJECTIVES: Ensure adequate number of cooling tower water pumps are running to maintain system pressure and cooling. Auto start a backup pump and maintain cooling tower water circulation if any of the running pumps fail or water pressure drops low.
RESULTING ACTIONS:
Auto Start cooling water pumps on low pressure <80psig or if spare pump trips off
BPCS 83-14, D-8327 Diesel Tank High Level Trip
OBJECTIVES:
Protect D-8327 from overfill
RESULTING ACTIONS:
Closes D-8327 diesel tank inlet valve (HV-8327-05).
ESS 87-2 Zone 2-1 Deluge Active
OBJECTIVES:
Activate deluge system zone 2-1 on high LEL conditions (E-6774-A/B/C/D, E-6731, Y-6771, G-6772/3)
RESULTING ACTIONS:
Opens HY-8702-01 Deluge System Zone 2-1.
BPCS 72-11 (Flare KO Pot Pump Protection G-7203)
Objective: Prevent the flare KO pot pump (G-7203) from running with low liquid suction head .
Resulting Actions: shutdown pump at <10% level
BPCS 81-15 (G-8117/18 Pumped Condensate Pumps Permissive and Low Level Trip)
Objective: To auto start the backup pump if the running pump fails. To prevent a pump from starting with low level in C-8110. Turn running pump off for low level in flash tank.
Resulting Actions: Trip condensate pumps (G-8117/18) at <10% and auto-Start condensate pumps (G-8117/18) at >24%
BPCS 82-18 (Raw Water Pumps Low Level & Low Pressure Start)
Objective: Ensure a raw water pump is running to maintain system pressure and feed flow to Evoqua. Auto start a backup pump and maintain raw water flow if a running pump fails or water pressure drops low. Shut down the raw water pumps on low level in the intake sump.
Resulting Actions:
Starts spare raw water pump Sets recycle flow control valve (FV-8210-04) output to full open. Places recycle control valve (FV-8210-04) output in auto.
BPCS 83-12, C-8312 20% Caustic Tank High Level / Temperature Trip
OBJECTIVES:
Prevent overfill of C-8312.
Protect downstream piping from high temperature caustic solution.
RESULTING ACTIONS:
Closes caustic tank C-8312 supply valve.
OOPS, I did it again, I played with your heart....
BPCS 82-16, Cooling Tower Fan Vibration Trip
OBJECTIVES:
Monitor vibration on the cooling tower fans and trip the fan for high vibration.
RESULTING ACTIONS:
Trips off cooling tower fans
ESS-72-3 (Flare Header Low Pressure N2 Addition)
Objective: Prevent low pressure and possible intake of air to flare header
Resulting Action: Open LP N2 to flare header when pressure is <.5psig on C-7202 drum
Objective and resulting actions for ESS 81-3 (LP Steam Overpressure Protection)
Objective: Prevent overpressure of the low pressure steam system by venting low pressure steam to C-8107
Resulting Actions: Opens PV 8108-04B when pressure is >150psig
ESS 82-1 (CLCW Pumps High/Low Pressure Trip)
Objective: Prevent running pump with high discharge pressure
Prevent low header pressure
Resulting Actions: Shutdown pump on high discharge pressure >165psig
Auto start pump on low header pressure <60psig or low D/P on pump discharge/return line <25psig
BPCS 83-11, D-8310 Caustic Blend Tank Inlet Overfill Protection
OBJECTIVES:
Prevent overfilling of 50% caustic tank
RESULTING ACTIONS: Closes caustic tank unload valve (HV-8310-04) at >90%
Closes cooled condensate inlet valve (HV-8310-05).
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Daily Double
Yesterday, today, and tomorrow