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The commissioning of the distillation unit in the hydrogen production facility of Shaanxi’s 500,000-ton coal tar deep processing project is nearing completion. Author/Source: Coal Tar Deep Processing and Hydrogenation Technology Collaboration Group. Date: May 21, 2020. Clicks: 9. On May 20, the water testing of the distillation unit in this project was successfully completed, indicating that the commissioning process is almost finished. This lays a solid foundation for the eventual operational start of the distillation unit. The water commissioning of the distillation unit began on May 15. It involved three steps: water washing, hot alkali washing, and further cleaning. Desalinated water was used as the medium for testing, nitrogen was used as the pressurizing gas, and steam served as the heat source. After 5 days of stable operation, samples were taken at various points; the pH value of the water was found to be 7, indicating that the water commissioning was successful from the first attempt. After the water transfer operation is completed, the distillation unit will undergo system drying, and a positive pressure will be maintained using nitrogen, in preparation for the subsequent joint commissioning and full-scale operation. Shaanxi Jingyi Chemical’s 500,000 tons per year project for the deep processing and integrated utilization of coal tar involves the use of advanced technologies with independent intellectual property rights, developed specifically for the characteristics of coal tar. The core technology consists of a combination of boiling-bed hydrogenation for quality improvement of coal tar across all fractions, along with fixed-bed hydrocracking; using medium- and low-temperature coal tar as raw material, this process primarily produces high-value aromatic chemical products. The project covers an area of about 1,200 mu, with an estimated investment of around 4.6 billion yuan. Construction of the project officially began in August 2017, and it is now in the final stages of design, civil works and safety preparations, as well as equipment installation. Completion and commissioning are expected by the end of October 2019. The projects mainly include: a 550,000-ton/year coal tar pretreatment unit, a 500,000-ton/year coal tar fluidized-bed hydrocracking unit, a 450,000-ton/year coal tar fixed-bed hydrocracking unit, a 400,000-ton/year naphtha continuous reforming unit, a 170,000-ton/year aromatic extraction unit, a 50,000 cubic meters per hour coal-to-hydrogen unit, a 50,000 cubic meters per hour air separation unit, a 100,000-ton/year methanol synthesis unit, as well as related supporting facilities such as hydrogen purification (PSA) units, sulfur recovery units, phenol-amine recovery units, storage and transportation systems, and other auxiliary and environmental protection systems.