The Yulin chemical construction site in the bitter cold of winter
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In the bitter cold of winter, at the construction site of the 1.8 million-ton coal-to-ethylene glycol project operated by Shaanxi Coal Yulin Chemical in the Yushen Industrial Zone, over 4,000 workers are working hard. To ensure the quality of construction in winter, the workers from the main contractor, China National Chemical Engineering Group Corporation, took stringent measures: for outdoor work, insulation materials such as waterproof sheets, quilts, and electric blankets were used to keep warm, while indoor areas were heated using fuel and steam. In addition, windproof and insulated shelters were constructed.
On January 17, good news came from the site of the purification unit project for Shaanxi Coal Group’s Yulin Chemical 1.8 million tons per year ethylene glycol production facility: the Yulin Chemical project team of the Western Branch successfully completed the lifting of the T104 thermal regeneration tower.
The thermal regeneration tower has a diameter of 4.4 to 5.4 meters, an installation elevation of 38 meters, and a net weight of 190 tons. To ensure the successful lifting of this extremely heavy and large-scale equipment in one go, the project team’s workers carefully designed a lifting plan that involved using a 1,200-ton crawler crane as the main lifting device and a 400-ton crawler crane to assist with the lifting process. This plan was used to install the pipelines attached to Tower 104, as well as the stairs on the platform atop the tower and the lighting fixtures. Before the lifting operation, a technical briefing was conducted and an operation permit was issued. The site was leveled to accommodate the 1200-ton crawler crane; the routes taken by the crane were hardened using red soil and gravel. The shafts along all paths taken by the crawler crane were filled with sandbags, and the foundation of Tower 104 was roughened. After a day of hard work, this large piece of equipment was successfully lifted into place in one attempt.
All 86 oversized equipment units for Yulin Chemical’s 1.8 million tons/year ethylene glycol project have been manufactured! On December 30, the final flue gas scrubber unit manufactured by Shanxi Coal Yulin Chemical, an enterprise in the park, passed the joint acceptance test, marking the completion of production of all 86 oversized equipment units manufactured on-site for the 1.8 million tons per year ethylene glycol project and the pyrolysis startup project.
Are they hiring again? 500 people
The oversized equipment manufacturing plant was put into operation in mid-April 2020, mainly used for the on-site production of 86 units of oversized equipment. The total net weight of the oversized equipment is approximately 19,500 tons. Among them, the largest and thickest-walled oversized device is the ethylene glycol synthesis tower, with a single unit weighing 389 tons and a cylinder wall thickness of 110 mm ； The tallest oversized equipment is the dealkylation tower, with a height of 77.4 meters ； The oversized equipment with the largest diameter is the Mn regeneration tower, with a diameter of 8.5 meters. Processes such as the rolling of the cylinder shells for various equipment, the butt welding of longitudinal and circumferential seams, the assembly welding of fittings and internal components, pressure testing, and acid cleaning for corrosion protection are all carried out on-site in the manufacturing facility designated for oversized equipment.
At 15:21 on January 15, the motor of the air compressor in the air separation unit of Yulin Chemical Company, part of Shaanxi Coal Group’s operations, was started for a trial run as part of the 1.8 million tons per year ethylene glycol production project; it operated steadily for 2 hours, with all operational parameters within normal ranges； At 19:28, the first trial run of the air separation compressor station was successful. This air separation compressor station is a complete set of units for the air separation plant of an 1.8 million tons/year ethylene glycol production facility, and it is primarily responsible for supplying instrument air and process air to all the equipment in the plant. Total dry basis air: 34150 Nm?/h. Before the commissioning, the external conditions for the circulating water required for this process were not met. The Air Separation Heat and Power Department promptly developed a temporary circulating water solution; everyone contributed their ideas, coordinated the use of water tanks, and installed temporary pipes and pumps, thereby laying the foundation for the successful commissioning of the air compressor. The successful first commissioning of this air separation air compressor station represents not only a milestone for the Air Separation and Thermal Power Department, but also signifies the successful completion of the company’s first goal-setting target for 2021. Since the construction of Yulin Chemical Company’s 1.8 million tons per year ethylene glycol production facility under Shaanxi Coal Group, tens of thousands of construction workers have been employed at the site to work hard to keep up with and surpass the schedule. At the same time, it took proactive steps in establishing 5G dedicated networks, planned 10 major 5G industrial application scenarios, and ensured full coverage of 5G networks both indoors and outdoors in the factory premises; it was also the first digital delivery project in China’s coal chemical industry to achieve \"three unifications\" in its delivery process.