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Yangmei Zibo Qilu First Fertilizer Co., Ltd. officially signed the EPC general contract for the technical upgrade project of its 45,000 Nm3/h syngas plant. Author/Source: Huahua Network Coal Chemicals. Date: February 20, 2021. Clicks: 12. Recently, Huisen Engineering officially signed the EPC general contract for the technical upgrade project of the 45,000 Nm3/h syngas facility with Yangmei Group Zibo Qilu First Fertilizer Co., Ltd. The project utilizes Jinhua Furnace 3.0 coal water slurry gasification technology and the low-temperature methanol washing purification technology independently developed by Huisheng Engineering. It is reported that this project is the second EPC turnkey project for Yangmei Group undertaken by Huisheng Engineering, following the 300,000 tons per year MTO project at Yangmei Hengtong. The project is scheduled to be completed and put into operation in early 2023, with Huisheng Engineering providing services such as design, procurement, construction, project management, and assistance with commissioning trials. The technical renovation project for the 45,000 Nm3/h syngas plant at Zibo Qilu First Fertilizer Co., Ltd., belonging to Yangmei Group, is located within the premises of Qilu First Fertilizer Factory in Linzi District, Zibo City, Shandong Province. The total investment for this project amounts to 904.75 million yuan. The proposed project uses coal as raw material. It replaces the existing fixed-bed batch gas production process with pressurized gasification of coal slurry, and substitutes the current wet desulfurization and PSA carbon removal processes with low-temperature methanol washing for purification. For the recovery of acidic gases, the existing batch sulfur melting recovery process is replaced by a wet acid production method. Meanwhile, two 85 t/h waste co-combustion boilers are modified to become circulating fluidized bed coal boilers, along with corresponding modifications to the dust removal, desulfurization, and denitrification equipment; the 6 MW steam turbine generator set remains in use. Zibo Qilu No.1 Fertilizer Co., Ltd. of Yangmei Group produces ammonia and urea using coal-based syngas. Its current production capacity is as follows: 180,000 tons per year of ammonia in total (of which 140,000 tons are liquid ammonia and 40,000 tons are methanol), 210,000 tons per year of urea, 210,000 tons per year of butyl octanol, 2.32 million tons per year of steam, and 86.4 million kW·h per year of electricity generation. Its predecessor was the First Fertilizer Plant of Qilu Branch of Sinopec Corporation; it was established in July 1969 and came online for operation in December 1972. It was China’s first domestic medium-scale nitrogen fertilizer plant that produced synthetic ammonia and urea from refinery off-gases. In March 2008, Qilu Yihua underwent a strategic restructuring with Shanxi Yangquan (Coal Industry) Group Co., Ltd., becoming part of Yangmei Group. At present, Qilu Yihua’s production process uses smokeless lump coal as raw material and relies on the traditional fixed-bed batch gas production method; the scale of production is small. The fertilizer production facility ceased operations on July 12, 2017. It was a gas generation and purification unit designed to support the production of butyl and octyl alcohols, and it employed traditional fixed-bed batch gas production as well as wet desulfurization processes. These methods result in high production costs, and there are significant safety and environmental issues associated with them. Although the company continues to invest in improvements, certain problems remain difficult to resolve due to the inherent limitations of the existing technology, posing a serious threat to the company’s survival. Moreover, Shandong Province requires that 90% of fixed-bed batch gasifiers with a diameter of less than Φ3000 be phased out by 2022; therefore, it is urgent to carry out technical upgrades to Qilu Yihua’s 45,000 Nm3/h syngas production facility. The proposed project uses coal as raw material. It replaces the existing fixed-bed batch gas production process with pressurized gasification of coal slurry (using Beijing Qingchuang Jinhua Technology Co., Ltd.’s coal slurry water-cooled wall waste boiler gasifier – Jinhua Furnace 3.0 technology), and replaces the current wet desulfurization and PsA carbon removal processes with low-temperature methanol washing for purification. For the recovery of acidic gases, the wet acid production method is used instead of the current batch sulfur melting recovery process. Additionally, two 85 t/h boilers that burn a mixture of waste gases are to be converted into circulating fluidized bed coal boilers that also burn a small amount of waste gases from storage areas and process emissions; the corresponding dust removal, desulfurization, and denitrification equipment will also be modified, while the 6 MW steam turbine generator set will remain in use. The newly installed production units include: an air separation unit, a water-coal slurry gasification unit, a CO conversion unit, a low-temperature methanol washing purification unit, a PSA hydrogen production unit, and a sulfur recovery unit. The existing ammonia synthesis, urea production, and Units 1# and 2# waste heat recovery units were removed, while the existing systems for coal storage and transportation, Units 3# and 4# waste heat recovery units, circulating water systems, chemical water treatment, sewage treatment, and power transformation were upgraded and reused. As a result, an effective synthetic gas production capacity of 45,000 Nm3/h was achieved.