Abstract:
The production activities of several important Industrial sectors in Bangladesh depend on an inadequate supply of natural gas. Natural gas is the main raw material for urea manufacture and basic components for production of urea, ammonia and carbon dioxide.
First of all natural gas is cracked by steam in the primary and secondary reformer to produce carbon dioxide, carbon monoxide and hydrogen. Moreover air is also added to the secondary reformer as a source of nitrogen. Carbon monoxide is converted to Carbon dioxide in the shift converters and carbon dioxide is separated from the gas steam in the carbon dioxide removal plant and send into urea plant under high pressure. Remaining components of the gas steam i.e. nitrogen and hydrogen react together under pressure and temperature to from ammonia. This ammonia and carbon dioxide then react together in pool reactor under controlled pressure and temperature to produce urea. Later on this liquid urea is supplied to granulator where spray of liquid urea being bonded with the small amount of binder. The granular urea is bagged with 50 kg content in polythene inserted polythene bags and delivered to the distribution barge and truck and rail wagons from the factory premises.
