Nitrogen+Syngas
31 December 2018
Plant Manager+ Series 1 - 50
Technical discussions on urea plant issues and operating problems, sharing experiences, providing advice and solutions. This compilation series PDF covers Problem No. 1 to Problem No. 50.
- Problem no. 1: Foaming in purification and concentration section
- Problem no. 2: High biuret level at low plant loads
- Problem no. 3: Higher vibration in high pressure pipelines
- Problem no. 4: Gaseous ammonia and dust emissions in urea plants
- Problem no. 5: H₂SO₄ injection in urea melt
- Problem no. 6: Choking of urea fluid bed granulator nozzles
- Problem no. 7: Urea melt pump damage
- Problem no. 8: Urea prilling buckets
- Problem no. 9: Unblocking pipelines after a urea plant shutdown
- Problem no. 10: High CO₂ content in liquid outlet of a high pressure CO₂ stripper in urea synthesis
- Problem no. 11: H ow to run high pressure centrifugal pumps in parallel mode
- Problem no. 12: Oil fouling of the high pressure stripper in a urea plant
- Problem no. 13: 3-Way valves in urea melt lines
- Problem no. 14: High synthesis operating pressure
- Problem no. 15: Pressure safety valve experiences
- Problem no. 16: High pressure scrubber problem
- Problem no. 17: Loose liner or overlay welding?
- Problem no. 18: HP stripper passivation air
- Problem no. 19: High pressure pumps – which is better reciprocating or centrifugal?
- Problem no. 20: Unblocking pipelines after a urea plant shutdown (continued)
- Problem no. 21: Vibrations in the discharge line of the HP reciprocating carbamate pump
- Problem no. 22: How to strengthen prilled urea product
- Problem no. 23: CO₂ compressor capacity limitation
- Problem no. 24: Why is the minimum urea plant load 60%?
- Problem no. 25: High temperature in top of HP scrubber
- Problem no. 26: How to find a leak in a liner
- Problem no. 27: How do you clean the scraper in a prilling tower?
- Problem no. 28: How to avoid hot prills in the prill tower bottom
- Problem no. 29: Stripper versus decomposer: What is the difference?
- Problem no. 30: What is the best stainless steel for urea?..
- Problem no. 31: Insulation of high-pressure flanges in a urea plant.
- Problem no. 32: Temperature drop at bottom outlet of HP stripper in a Saipem urea plant
- Problem no. 33: Excessive amount of carbamate solution from recirculation section
- Problem no. 34: Reuse of off-spec waste
- Problem no. 35: Urea plant preservation
- Problem no. 36: Change in colour of urea product
- Problem no. 37: Faulty reactor pressure transmitter
- Problem no. 38: Flares in urea plants
- Problem no. 39: Warehouse curing for urea granules
- Problem no. 40: Medium pressure absorber in Saipem urea plant
- Problem no. 41: Leakage of a high pressure flange connection
- Problem no. 42: Coated urea fertilizers
- Problem no. 43: Increased dust content of urea granules
- Problem no. 44: Rise in HP CO₂ stripper outlet temperature
- Problem no. 45: Effect on reactor liner in case of reactor hold up
- Problem no. 46: CO₂ cooler failure
- Problem no. 47: A ctive corrosion during blocking in
- Problem no. 48: Seal systems of high pressure reciprocating pumps
- Problem no. 49: Reverse rotation CO₂ compressor
- Problem no. 50: Low vacuum pressure in the second-stage evaporator
