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HAZOP UTP Chem. Eng.Full description
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Company: Facility:
No
Pump Failure. Manual valve closed
Potential pipe failure
Valves are visible from the control room
Potential slip hazard
Standard Operating Procedure
Closed block valve anywhere in water piping Low
Backflow
Line Blockage
Failure of a flexible coupling at one of the tank connections Check valve failure Tank Capacity Exceeded
Low
High
Install flow meters
Prolonged treatment process
Flowing water from tan ker makes audible sound Clear blockage
Increase pump pressure
Loss of Cooling
Install Check Bulb
Install flow meters
Consider relocating tank isolation valves from the piping to directly on the tank, upstream of the flexible coupling Consider modifying the Standard Operating Procedure to
Possible Runaway reaction
Backflow due to high back pressure
Contamination
Low H2SO4
Yeast Growth
Too much Lime
Consider modifying the Standard Operating Procedure to keep the containment isolation valve closed
Install pH indicator
Install a heat exchanger in juice tank
Low Alcohol Yield
Install pH meter
Bacterial Contamination
Sterilization of Reactor Tank Install a heat exchanger in juice tank
Low Alcohol Yield
Install pH indicator
Install pH meter Sterilization of Reactor Tank
Rj Junsay BS ChE 5
ChE 532: Equipment Design July 30, 2018
Low High
Low pressure in the reactor More Flow rate
Overflow in the reactor tank
Install floater
Install floater
Install floater
Install floater Add antifoam such as silicon oil
Runaway Reaction
Pipe is not depressurized
Potential personnel exposure
Standard Operating Procedure
Consider adding bleeder valves to the piping on the suction and discharge side of the pump
Safety shower in the area
Low
Cold Weather/ Low Ambient Temperature Low water Supply Temperature Heat exchanger f ouling
High
Partial Plugged Cooling Line How Weather/ High Ambient Temperature High water Supply Temperature Hot water tempe rature transmitt er fails LOW
Rj Junsay BS ChE 5
Reactor Cools
Temperature indication
Reactants Concentration Builds up
Local temperature and pressure indicators
Possible runaway on heating
Potential overh eating of sludg e with potential to kill microor ganisms
Install Heat Exchanger
Pump failure alarm in th e DC
Temperature indication
Injection of cooling water
Local temperature indic ators
Install Heat Exchanger
Potential decre ase in digester efficiency Potential perso nnel exposure to hot fluids (>1 40F
ChE 532: Equipment Design July 30, 2018
Tank Maintena nce
Accessing instruments on t op of the tank
Potential personnel fall hazard
Tanks supposed to be equipped with guardrails and caged ve rtical ladder
Consider verifying ladder and guardrails are included on the tank specification
Standard Operating Procedure
Safeguards: Existing or proposed (for new projects) measures that detect or warn of a deviation or consequence, prevent a deviation or consequence or mitigate the effects of a consequence. Recommendations: Design, operating or maintenance changes that reduce or eliminate deviations, causes and/or consequences.
