The project in Shanxi to produce 250,000 tons of methanol and 70,000 tons of synthetic ammonia from coking oven gas has yielded qualified methanol

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Shanxi’s project to produce 250,000 tons of methanol and 70,000 tons of synthetic ammonia from coke oven gas has yielded qualified methanol. Author/Source: Gasification World. Date: December 27, 2022. Clicks: 17. At midnight on December 25, 2022, Shanxi Junshan New Materials Technology Co., Ltd.’s project for the comprehensive utilization of coke oven gas produced qualified methanol. Project Overview: The comprehensive utilization project of coke oven gas carried out by Shanxi Junshan New Materials Technology Co., Ltd. is located in the Economic Development Zone of Xiaoyi City, Lüliang Province, Shanxi Province. It uses coke oven gas produced by Xiaoyi Jinhui Coal and Coke Co., Ltd. as raw material to produce methanol and synthetic ammonia. The project’s capacity for processing coke oven gas is 63,000 m3/h; after compression, advanced desulfurization, and conversion of the coke oven gas, methanol is produced. The scale of the methanol production facility is 250,000 tons per year. The off-gases from methanol synthesis are subjected to PSA hydrogen extraction, followed by the production of liquid ammonia; the capacity of the ammonia synthesis facility is 70,000 tons per year. The project construction includes mainly a methanol plant (supergravity dust removal, dry gas holders, initial pressure treatment of coke oven gas, TSA purification, pressure boosting of coke oven gas, advanced desulfurization, conversion, compression of methanol synthesis gas, methanol synthesis, methanol distillation, etc.), an ammonia synthesis plant (PSA hydrogen production, compression of recycle gas, ammonia synthesis, preparation of ammonium hydroxide, refrigeration stations, air separation, nitrogen compression), as well as supporting utility systems, auxiliary production facilities, storage and transportation infrastructure, and environmental protection systems. The construction scope of the Jinhui Coking Project mainly includes a coking plant with an annual capacity of 2.05 million tons. For the design of this coking plant, German ThyssenKrupp TKIS-6.78-I type coke ovens are planned to be used – these ovens have an average chamber width of 555 mm and a height of 6,780 mm, feature dual flue channels, waste gas recycling, bottom injection, segmented regenerators, two-stage heating, and single-type ramming. The designed nominal capacity is 2.05 million tons of dry coke per year; the plant will consist of 2x70 ovens in total. It will also include a 1x260 t/h dry quenching system for coke, as well as a power generation unit, with a wet quenching system available as a backup. In accordance with the agreement between Xiaoyi City Coal and Coke Co., Ltd.’s coking project and Shanxi Junshan New Materials Technology Co., Ltd., as well as Jinhui Group’s overall plan, this project utilizes the remaining gas from Xiaoyi City Coal and Coke Co., Ltd.’s coking project to produce methanol and synthetic ammonia. The wastewater generated by the project is sent to the wastewater treatment facility of that same coking project for treatment before being reused; it is not discharged outside ； The steam required to start up this project is supplied by the steam extracted from the dry quenching boiler turbine power station of the Jinhui Coking Project; once the project is operating normally, any excess steam generated is sent to the Jinhui Coking Project ； The demineralized water used in this project is supplied by the Jinhui Coking Demineralized Water Station ； During the design and environmental impact assessment phases of this project, comprehensive consideration was given to factors such as the amount of coke oven gas required as raw material, wastewater reception, steam reception, and the supply of demineralized water.