Successful commissioning of key units for Shaanxi Jingyi Chemical’s 500,000-ton coal tar deep processing project

Thread Content

Successful Commissioning of Key Equipment in Shaanxi Jingyi Chemical’s 500,000-ton Coal Tar Deep Processing Project Author/Source: Coal Chemistry News Date: April 22, 2020 Clicks: 6 On April 20, the overall commissioning of the heat recovery unit in the purification workshop of Shaanxi Jingyi Chemical Co., Ltd.’s hydrogen production facility was a complete success. This marks the fact that the company’s heat recovery unit is now ready for operational use, and it also represents a new breakthrough in the commissioning process of the company’s hydrogen production center. The commissioning of the heat recovery unit at Shaanxi Jingyi Chemical Co., Ltd. began as early as December 13, 2019. Devices such as deaerators and low-pressure boiler feed water pumps were successfully commissioned one after another, but due to winter weather conditions, the overall commissioning process was suspended and postponed. After the New Year, as the weather warmed up, the subsequent testing of the heat recovery unit was carried out step by step. On April 17, the dimethylcopper oxime dosing unit and the ammonia dosing unit successfully completed their commissioning tests ； On April 18, the two medium-pressure boiler feed pumps were successfully commissioned ； On April 20, the two high-pressure boiler feed pumps were successfully tested, and all equipment in the heat recovery system operated smoothly, resulting in a complete success for the overall testing process. The successful overall testing of the purification heat recovery unit provides strong support and a solid foundation for the subsequent equipment testing activities at the hydrogen production center. 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.