Design progress for the 400,000-ton ammonia and 600,000-ton urea project in Shandong using space-based powder gasification technology

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Design progress for Shandong’s 400,000-ton ammonia and 600,000-ton urea project using space-based powder gasification – Author/Source: Gasification World, Date: 11-29-2021, Clicks: 5. According to Saiding Company, the company held meetings on November 9 and 11, 2021, to review the PDMS models related to the ammonia synthesis section of the Alliance Chemicals 40·60 project, as well as a meeting to review the 60% PDMS model developed by the company itself; these meetings were held to examine and discuss the PDMS models. The ammonia synthesis section is the last section in the main process of the alliance project. The Shandong Alliance 40∙60 project upgrades the conventional fixed-bed batch gas production process by employing space-based powder coal gasification, low-temperature methanol washing, and liquid nitrogen washing technologies. In addition, the pressure swing adsorption process will also be used to purify H2 from the raw gas used in low-temperature methanol washing, in order to produce hydrogen for use as vehicle fuel. The project is scheduled to go into operation in 2023. Shandong Lianmeng Chemical Co., Ltd.’s 40.60 Project – Upgrading of Clean Production Technologies. Location of construction: Houzhen Chemical Industrial Park, Shouguang, Shandong. Nature of the project: Technical upgrade. Project overview: Shandong Lianmeng Chemical Co., Ltd. is a large-scale chemical manufacturing enterprise that focuses on coal-based chemical production. The company’s main business activities include the production and sales of urea, synthetic ammonia, methanol, liquid CO2, and sulfur ； Production and sales of related fine chemical products ； Import and export operations within the scope permitted by the qualification certificate. The existing “40.60” project is a relocation initiative carried out by the Union Joint Stock Company in 2011, aiming to move all production facilities located in the urban area to the Houzhen Chemical Industrial Park; it was completed and put into operation by the end of 2012. The current production capacity is 400,000 tons per year of synthetic ammonia, 200,000 tons per year of methanol, and 600,000 tons per year of urea. The 40.60 Project Clean Production Technology Upgrade Project involves modifying only the ammonia synthesis section of the existing “40.60” Project; upon completion of the upgrades, the annual production capacity of ammonia will remain at 400,000 tons, urea at 600,000 tons, and methanol at 200,000 tons. Following the technical upgrade, the gas production process was changed from a fixed-bed batch method to a pressurized coal gasification process ； The original 2 sets of desulfurization units, 3 sets of shift units, 2 sets of shift gas desulfurization units, 2 sets of PSA pressure swing adsorption decarburization units, and 2 sets of high-pressure alcohol alkylation units were replaced by 1 set of isothermal shift unit, 1 set of low-temperature methanol washing unit, and 1 set of liquid nitrogen washing unit respectively ； The ammonia synthesis process was changed from 2 sets of high-pressure synthesis units to 1 set of low-pressure synthesis unit, with the operating pressure reduced from 22 MPa to 15 MPa ； Complementary air separation units and waste gas treatment units are to be installed. Construction unit: Shandong Lianmeng Chemical Co., Ltd