Neochim Plc · BSESOF:NEOH
Neochim — Technical Presentation (March 2009)
19 slides from Neochim's technical presentation, March 2009
Slide 1: Utilizing the Original Prilling Tower
PLANT UTILIZING THE ORIGINAL PRILLING TOWER MAXIM FERD OAO GIAP, MOSCOW, RUSSIA VASIL GRANCHAROV NEOCHIM PLC, DIMITROVGRAD, BULGARIA
Slide 2: Features of a typical AN-72 plant
Features of a typical AN – 72 plant: Design capacity 1360 MT/Day One - stage neutralization in reactors operating under atmospheric pressure. One - stage evaporation under atmospheric pressure in air current.
Slide 3: Ammonium nitrate melt pumped to top of prilling tower
Ammonium nitrate melt is pumped from the ground level to the top of the prilling tower. Steel - made prilling tower with a rectangular cross - section is employed. The fluidized bed cooler is placed outside the prilling tower.
Slide 4: Air and steam scrubber treatment before venting
Air coming from the evaporator and the prilling tower, together with the steam exiting the secondary steam recovery system, undergo scrubber treatment prior to being vented to the atmosphere.
Slide 5: 19 AN-72 plants built in 1977-1987
There are a total of 19 AN – 72 plants built in the period 1977 – 1987, all of them in the FSU countries and a single one outside the FSU, built in Dimitrovgrad, Bulgaria, and operated by Neochim PLC.
Slide 6: wd Zw ur HUT / BREAS a
wd Zw ur 1 HUT / BREAS a
Slide 7: Sole significant improvement: filter packs in scrubbers
The sole significant improvement of the AN - 72 plants until nowadays, has been the addition of filter packs as a final stage in the scrubbers at the top of the prilling tower.
Slide 8: Slide 8
Slide 9: PAPAUITANGHEADL
PAPAUITANGHEADL WV
Slide 10: Engineering decisions for the prilling tower: fans and granulators
Engineering decisions for the prilling tower include: Replacement of the three fans supplying air to the tower’s bottom and the six exhaust fans at the top of the tower by new ones with total capacity 30 % greater than this of the original ones. Replacement of the original 3 static granulators by 2
Slide 11: Engineering decisions for the prilling tower: scrubber filters
Engineering decisions for the prilling tower include: Increase of the filter surface of the six scrubbers at the tower’s top by 10 % and use of three - layer packs of filtrating material with different layer characteristics. Washing of the frontal filter pack’s surface with finely - spread secondary
Slide 12: Engineering decisions for the prilling tower: preliminary purification
Engineering decisions for the prilling tower include: Introduction of preliminary purification of the secondary steam and air from the evaporators in a separate scrubber prior to the steam air stream being fed to the tower’s scrubbers. Introduction of additional ammonia air cooling at the second sta
Slide 13: Engineering decisions for the wet part
Engineering decisions for the “wet” part include: Addition of a new neutralizer identical to the existing ones, an evaporator with modified design, and of all necessary equipment for their operation.
Slide 14: Project Milestones
IU UARAGH N ANUHEADL Project Milles | June 1% 2007 First earth moved _—a = June 16!" 2008 First neutralization in the “new” wet part carried out sill LOneCS i July1s*2008 Plant at full swing _~g
Slide 15: PAPAUITANGHEADL
PAPAUITANGHEADL WV
Slide 16: Operational parameters before and after the revamp
Comparison of the plant’s major operational parameters before and after the revamp. Item Before revamp After revamp Ammonia 214.0 Kg/MT 211.5 Kg/MT Nitric acid 780.0 Kg/ MT 777.3 Kg/ MT 17 Bar Steam 0.236 T/MT 0.181 T/MT Power 20 kW/MT 22.9 kW/ MT AN emission exit tower Less than 70Mg/NM3 12.8 Mg/NM
Slide 17: Capacity increase of more than 70% on name plate
bypassing the originally installed sieve / section and thus discontinuing reprocessing - \ of off spec material. 4 reduced to BAT levels. | Capacity increase of more than 70 %, based on - Yname plate, and more than 50 %, based on best log, __/) was achieved. y,
Slide 18: Conclusions: 50% capacity increase
50 % CAPACITY INCREASE CONCLUSIONS
Slide 19: Thank you!
THANK YOU ! СПАСИБО МАКСИМ ФЕРД ! СПАСИБО “ГИАП “ !