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Tag: Saipem

Plant Manager+

Every urea plant is also a water plant as the overall reaction starts with two molecules of ammonia and one molecule of carbon dioxide resulting in one molecule of urea and one molecule of water. Further water is added to the process via the steam ejectors in the evaporation section. All this water, which is contaminated with ammonia, carbon dioxide and urea plus possibly other contaminants like formaldehyde, methanol, oil, etc is collected in an ammonia water tank and then sent to a wastewater treatment section. The purpose of the wastewater treatment section is to reduce the ammonia, carbon dioxide and urea levels to acceptable levels. First the wastewater is treated in a first desorber column, where LP steam is used to strip off the ammonia and carbon dioxide, reducing the ammonia content from approx. 6-8 wt-% ammonia to approx. 1 wt-% ammonia. Nothing happens with urea in the first desorber as temperatures are too low to hydrolyse the urea back to ammonia and carbon dioxide. This takes place in the next step, in the hydrolyser, which can be quite a large counter current column operating with MP steam at approx. 23 bar (Stamicarbon design) or a horizontal deep hydrolyser operating at approx. 33 bar (Saipem design, refer to figure). Downstream of the hydrolyser there is another desorber column to strip off the remaining ammonia and carbon dioxide. Nowadays, boiler feed water quality can be realised by modern wastewater treatment. But at higher plant loads the operating margin in the wastewater treatment can become too small leading to higher ammonia and urea levels during certain operating conditions… n

Nitrogen Industry News

OCI Global says that it has reached an agreement for the sale of 100% of its interest in its large-scale nitrogen fertilizer subsidiary the Iowa Fertilizer Company LLC, located in Wever, Iowa, to Koch Ag & Energy Solutions for $3.6 billion. Completion of the transaction remains subject to US anti-trust approval and other customary closing conditions. The transaction is expected to close in 2024. Morgan Stanley & Co. International plc is serving as financial advisor to OCI on the transaction. IFCO produced 1.2 million t/a of urea ammonium nitrate (UAN) in 2021 and 700,000 t/a of anhydrous ammonia, as well as 700,000 t/a of diesel exhaust fluid (DEF).

Sulphur Industry News

Tecnimont, part of MAIRE’s Integrated E&C Solutions business unit, has signed a letter of award with ADNOC for the onshore processing plant of the Hail and Ghasha Development Project. The award was signed at ADIPEC, the world’s largest energy summit. The project aims to operate with net zero CO 2 emissions, in part due to the facility’s CO 2 carbon capture and recovery units, which will allow the capture and storage of CO 2 . The project will capture 1.5 million t/a of CO 2 , taking ADNOC’s committed carbon capture capacity to almost 4 million t/a. The company recently announced its decision to double its carbon capture capacity to 10 million t/a by 2030. The Hail and Ghasha CO 2 will be captured, transported onshore and stored underground, while low-carbon hydrogen will be produced to replace fuel gas and further reduce emissions, according to ADNOC. The project will also use power from nuclear power plants and renewable sources from the grid.