Plantilla de excel para aplicar la metodología HazopDescripción completa
Sample of a HAZOPFull description
hazop silDescripción completa
hazopFull description
Study Node: Oxidation Reactor Process : Oxidation of p-xylene to Terephthalic Acid
Description complète
Plantilla de excel para aplicar la metodología HazopFull description
Hazard and Operability Analysis example.Full description
Diammonium Phosphate (DAP) Production Phosphoric acid and ammonia are mixed, and a non-hazardous product, diammonium phosphate (DAP), results if the reaction of ammonia is complete complete (see Fig. 3). If too little phosphoric phosphoric acid is added, the reaction is incomplete, and ammonia is produced. Too litt le ammonia available to the reactor results in a safe but bu t undesirable product. Valve A
Phosphoric Acid study line 1 phosphoric acid delivery line Valve C
Ammonia
Valve B Diammonium
HAZO P STUD Y RECO RD SHEE T
PROJECT: AMMONIA PLANT
DATE: DD/MM/YY
SYSTEM: DAP PRODUCTION
PRESENT: HAZOP TEAM MEMBER LIST
PAGE: 1
PROCESS PARAMETER: FLOW (Primary keyword) LINE: STUDY LINE 1 NO. 1
GUIDE WORD NO
TOTAL PAGES:1 CHAIRED: HAZOP LEADER
DEVIATION NO FLOW
SECRETARY: TEAM MEMBER
CONSEQUENCES Excess ammonia in reactor and release to work area.
POSSIBLE CAUSES •
Valve A fails closed.
•
Phosphoric acid supply exhausted.
2
LESS
LESS FLOW
Excess ammonia in reactor and release to work area. With amount released related to quantitative reduction in supply. Team member to calculate toxicity vs flow reduction.
3
MORE
MORE FLOW
Excess phosphoric acid degrades product. No hazard to work area.
4
PART OF
Normal flow of decreased concentration of phosphoric acid.
Excess ammonia in reactor. release to work area, with amount released related to quantitative reduction in supply.
•
Pipe ruptures
•
Valve a partially closed.
•
•
Partial plug or leak in
DONE (sign off)
Team member to calculate toxicity vs flow reduction. Set point determined by toxicity vs flow calculation. Automatic closure of valve to reduce flow from phosphoric acid supply.
Vendor delivers wrong
Check phosphoric acid supply tank concentration after charging.
Error in charging
PERSON
Automatic closure of valve B on loss of flow from phosphoric acid supply.
pipe.
material or concentration. •
ACTION REQUIRED
phosphoric acid supply tank.
5
OTHER THAN
Material flow other than phosphoric acid in Line A.
Depends on substitution. Team member assigned to test availability of other materials.
•
Wrong delivery from vendor.
•
Wrong material chosen.
Plant procedures to provide check on material chosen before charging phosphoric acid supply tank.