New technologies are being implemented in fertilizer plants all over the world and these advanced technologies and innovative modifications are aimed at increasing production capacity, simultaneously reducing energy consumption and environmental footprints.

 

High purity carbon dioxide (CO₂) is a by-product of ammonia production, but it is also a necessary ingredient in the production of urea fertilizer.  Therefore, the industry captures CO₂ emitted during ammonia production and re-uses it during the urea production process.  However fertilizer plants have always had to face the problem of deficiency of CO₂ and for this reason a carbon dioxide recovery unit is considered to be the appropriate and right technology to make up for the shortage.

 

The advanced process is based on absorption of CO₂ in amine based solvents which is liberated at high temperatures in the regenerator.  SOx or NO₂ react with the solution in the CO₂ absorber and form heat stable salts and when the salt content in the solution reaches the maximum, the reclaimer is operated to boil down the solution so that the salt is concentrated to sludge to be

discharged.  The reclaimer operates as a batch distiller.  The degradation products have a higher boiling temperature than the solution itself and once the vapour leaves the reclaimer and the degradation products remain as reclaimed waste, this reclaimed waste is sent to the incinerator for disposal.

 

The incinerators recommended for this application include BP or PDR models depending on the quantity of waste along with liquid waste disposal system, venturi scrubber, 30-m stack, MCC and PLC panels, local control stations.  All the electricals are required to be flameproof because of the presence of gas in the atmosphere.  The system is fully automatic and does not require manual intervention.

 

Haat’s incinerators are working both in India and abroad for this application for the past 15 years.  Read a case study here – Reference Project.