Mono & Di Ammonium Phosphate Granulation Desmet Ballestra proposes MAP/DAP/NPK plants based on in house developed pipe reactor technology:
Mono and Di ammonium phosphate reactor When phosphoric acid is available on site, the reaction between ammonia and phosphoric acid in a reactor is the better economical option for the manufacturer to make profits. The advantages of the pipe reactor can be summarized as: - Very high flexibility. The plant can switch very quickly from one product to another. The same plant can produce several NPK formulations. - The reaction heat is used efficiently. - Increase of production rate (reduction of recycle ratio) - Improvement of product quality (nitrogen content, less chemically insoluble P2O5, less dust)
Process description
MAKE UP
SULPHURIC ACID
SCRUBBER
WATER
PHOS ACID AMMONIA
GRANULATOR
DryeR
COOLER
SCREENS
COATER
AIR
HOT AIR CRUSHER
Phosphoric acid reacts with gaseous ammonia. The reaction is highly exothermic, allowing to evaporate the water included in the recycled solution from the scrubber. The granules are dryed with hot air in a co-current dryer drum; the final product is separated from both the oversized and undersized granules and cooled down, coated and sent to storage. The oversized product is crushed and sent back to granulator with undersized product. All equipment are dedusted and the air released to the atmosphere is clean.
Characteristics of the final products
Detergents Surfactants Soap & Chemicals
MAP
DAP
Water content %
1,5
1,5
Composition (N-P2O5-K2O)
11 – 52 -0
18 – 46 - 0
Granulometry
2mm<95%<5mm
2mm<95%<5mm
Hardness kg
4
4
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