May 2017

Special Focus: Maintenance and Reliability

Extend unit life at ammonia-urea plants with debottlenecking and equipment replacement

Nagarjuna Fertilizers and Chemicals Ltd. (NFCL) operates a large, modern, integrated ammonia-urea complex with an annual capacity of 1.6 metric MMtpd of urea from natural gas feedstock. The facility is laid out in two units, located in Kakinada in India’s coastal state of Andhra Pradesh.

Kumar, K. R. R., Anand, G. V. S., Nagarjuna Fertilizers and Chemicals Ltd.

Nagarjuna Fertilizers and Chemicals Ltd. (NFCL) operates a large, modern, integrated ammonia-urea complex with an annual capacity of 1.6 metric MMtpd of urea from natural gas feedstock. The facility is laid out in two units, located in Kakinada in India’s coastal state of Andhra Pradesh. Unit 2 was originally designed to operate on naphtha, due to the unavailability of gas feedstock at the time of design in the late 1990s. Later, the unit was modified to process both natural gas and naphtha, as natural gas became available for processing. The feedstock was completely changed to gas in 2009. NFCL utilizes a conventional ammonia process with a steam reforming process. Units include a desulfu

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