urea production process
Post on 15-Jan-2017
732 Views
Preview:
TRANSCRIPT
Vocational training
PresentationON
Urea production processBy
VishakhaB.Tech final yearChemical engg.
(Institute of technology)(Guru Ghasidas University)
Where I did training ?
National fertilizers limited (N.F.L)A public sector undertaking
Vijaipur, Guna (M.P)
Introduction about NFL•NFL is one of the largest contributor of nitrogenous fertilizer in the country. It was started on 23 august 1974. • It is the first company to be permitted by Govt. of india to produce and market neem coated urea.•Four units – line 1 ammonia line 2 ammonia
line 1 urea line 2 urea• CPP and waste heat reboiler•DM water plant supplies water to Boiler feed water(BFW)
Capacity of plant
• Line 1: 11 stream = 1510 tpd12 stream = 1310 tpd
• Line 2: 31 stream = 1610 tpd41 stream = 1310 tpd
Total production = line 1 + line 2 = 5740 tpdEach bag is filled up by 50 kg of urea So total bags per day = 114800 bags
UREA
• Molecular weight = 60.06• M.P =132.7 degrees• Density = 1.3335 g/cm3• Raw materials– Ammonia (liquid)– Carbon dioxide (gas)
REACTIONS INVOLVED
2NH3 + CO2 NH2 COONH4
NH2COONH4 NH2CONH2 + H2O SIDE REACTIONS NH2COONH4 2NH3 + CO2NH2COONH4+H2O NH3+CO2+H2ONH2CONH2+H2O 2NH3+CO2 (hydrolysis)2NH2CONH2 NH2CONH2CONH2+H2O (Biuret)
PARAMETERS AFFECTING PROCESS
1. Temperature : • Maximum equilibrium conversion around
190-200⁰C. •Higher temperature leads to corrosion2. Pressure: • equilibrium pressure becomes higher when
temperature increases3.Residence Time: •minimum R.T. to attain equilibrium = 20 min.
UREA REACTOR STRIPPER
CARBAMATE SEPARATOR CARBAMATE CONDENSOR
MEDIUM PRESSURE DECOMPOSER
VACCUM CONCENTRATOR
VACCUM SEPARATOR
PRILLING TOWER PRILLING BUCKET
Specifications for Prilling tower
Airflow through Prilling tower is 12000 Nm3/ton
PRILL SIZE PRILLING TOWER
1. 2mm2. 3mm3. 4mm
90 meters 150 meters 220 meters
CONCLUSIONS
1. Policies: Environment policy(ISO-14001) Quality policy (ISO-9001) Energy policy Health and safety policy(ISO-9001)2. Products: Kisan urea HNO3,NH4NO3,NaNO3,S,Menthol,N2 etc3. Bio fertilizer plant: Psb, Rhizobium,Azotobacter
top related