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Progress on the Construction of the Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project Author/Source: Coal Chemical Engineering 114 Forum Date: April 16, 2020 Clicks: 6 At 11:45 a.m. on April 14, the 35kV substation for the air separation unit of the Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project (Phase I project) – which is under EPC contracting by Hualu Technology – successfully received power supply, marking the full transition of work on site from the construction phase to the commissioning phase. To ensure the successful completion of the power reception process at the substation, the project team carried out specialized \"three inspections and four determinations\" tasks in advance regarding the power reception conditions. They carefully formulated plans to address remaining tasks related to civil work, fire safety, electrical systems, and 6S labeling, paid close attention to the implementation of these corrective actions, monitored the arrival of equipment and materials on a continuous basis, and meticulously prepared a power reception plan for the substation. Technical and safety management personnel were organized for special briefings, and the standard operating procedures for power reception were strictly followed, thereby providing comprehensive and necessary support for this process. The air separation unit substation is the first 35kV main unit substation in the Shenhua Yulin SYCTC-1 project to receive power officially. It laid a solid foundation for subsequent individual testing of motor equipment, oil operation of the one-drive-two units, power-on commissioning of the DCS, and startup of the steam turbines. The methanol plant of the Shenhua Yulin Circular Economy Comprehensive Utilization Project, constructed by Sanhua Jian of China National Chemical Engineering Corporation (hereinafter referred to as Sanhua Jian), is currently the largest methanol production facility in China. The device features large-diameter, ultra-thick stainless steel pipes with a sound level of around 20,000 DB; the pipe diameter ranges from Ф168 to Ф1118, and the wall thickness is between 17 mm and 56 mm. Pipe cutting, groove preparation, pipe drilling, and pipe welding are all challenges in construction, and conventional plasma cutting techniques are not sufficient to handle them. Sanhua Jian has successively purchased high-efficiency band saws for cutting large-diameter pipes, CNC-driven high-speed beveling machines for pipes, automatic welding machines for thick-walled large-diameter pipes, and high-power efficient plasma cutters; it also collaborates with specialized metal processing enterprises to carry out pipe hole-cutting operations. Sanhua Jian constructed 6 units in the first phase of this project, including the air separation unit, gasification unit, on-site coal transportation facilities, methanol production unit, circulating water system, and salt-containing wastewater treatment facility. Among them, the methanol plant project commenced on March 29, 2019, with the contract completion date set for August 30, 2020. The methanol plant utilizes Zhejiang Shenghong’s patented methanol synthesis technology to produce 2 million tons of MTO-grade methanol per year; it also generates superheated steam at 1.7 MPaG and fuel gas. This output will serve as raw material for the existing Shenhua Shaanxi methanol downstream processing projects, enabling an integrated combination of the two projects and unified production management. The first-phase project of the Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project is a preliminary phase of this project (CTC Project). It also serves as a facility for producing methanol raw materials to support the already completed Shenhua Shaanxi Methanol Downstream Processing Project (SSMTO). With a total investment of 13.6 billion yuan, the construction includes facilities for producing 1.8 million tons per year of methanol along with 400,000 tons per year of ethylene glycol. The project comprises processes such as air separation, coal gasification, shift reaction, acidic gas removal, methanol synthesis, sulfur recovery, and ethylene glycol production, along with the necessary utility systems and auxiliary facilities. Once completed, it will enable integrated production and management together with the SSMTO project. It is reported that General Electric (GE)’s high-efficiency water-cooled coal slurry gasification technology was selected for the project in order to promote the clean, comprehensive, and efficient utilization of coal. The project utilizes 5 gasifiers of the single-series type, with a coal feeding rate of 3,100 tons per day on a dry basis, operating in a slurry-cooled process; the pressure level is 6.5 MPa. These gasifiers are equipped to produce 1.8 million tons of methanol per year (for olefin production), as well as 400,000 tons of ethylene glycol and other high-value downstream products. Methanol synthesis uses the David technology, while ethylene glycol employs the Shanghai Pujing technology. The Shenhua Yulin Circular Economy Coal Comprehensive Utilization Project (hereinafter referred to as the CTC Project) was officially approved by the **National Development and Reform Commission on March 16, 2015 (Document No. FGNY [2015] 508). The total investment in the project amounts to 120 billion yuan.