The various units in the caprolactam production section of Guangxi Hengyi New Materials Co., Ltd. have successfully started feeding material and entered the trial production phase
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On October 22, the various units in the caprolactam production section of Guangxi Hengyi New Materials Co., Ltd., a subsidiary of the Southwest Branch, began to receive feed successfully, marking the completion of the entire process for this project and its smooth entry into the trial production phase. The caprolactam production unit at Guangxi Hengyi mainly consists of three main units: ammonia oximation, purification, and ammonium sulfate production. Since the start of the installation work in June this year, over a period of 4 months, a total of 590,000 welds were completed, more than 500 various types of equipment were installed, in addition to the construction of associated internal pipe galleries and storage tanks. By the end of August, the welding work was largely completed, and the project handover ceremony was held successfully. The project construction took place during the peak of the hot season, with average temperatures above 38°C. Faced with various constraints, the company and its subsidiaries held multiple on-site promotion meetings, establishing an efficient management mechanism based on coordinated efforts at all levels, which provided a solid foundation for the smooth progress of the project ； The project team faced the challenges head-on; by breaking down the tasks for each stage and assigning responsibilities to specific individuals, they held daily on-site meetings to address various issues that arose during construction, such as shortages of materials, coordination problems with machinery, and inspection requirements. They ensured a close alignment between safe production practices and the construction schedule. Through thorough risk assessments, meticulous planning of construction activities, strict safety measures, and efficient inter-departmental cooperation, they managed to complete the project on time and to a high standard, while maintaining safety controls, thereby demonstrating excellent project execution capabilities. WeChat Image_20251024154308_1_278.jpg The successful feeding of materials this time indicates that the project has completed all its construction tasks on schedule as agreed in the contract. This creates the necessary conditions for the upstream and downstream parties involved with Hengyi to carry out joint testing, thereby enabling an integrated development of the \"benzene-caprolactam-nylon\" industry chain. It facilitates efficient coordination among the various stages of this chain as well as optimal allocation of resources, further strengthening Hengyi’s leading position in the industry.
On April 9, 2024, the ceremony for the first lifting of the large-scale equipment for the 1.2 million-ton per year caprolactam-polyamide integrated production facility and related infrastructure at Guangxi Hengyi New Materials Co., Ltd. was successfully held. The first lifting of the shift gas scrubber for the hydrogen-ammonia project was successfully completed, marking the official start of equipment installation and process piping work, and indicating that the project construction has entered a critical phase focused on actual equipment installation.
At 9:17 a.m. on April 9, 2024, upon the commander’s command, firecrackers went off and fireworks were set off at the scene; the 86-meter-long, 676-ton gas shift washing tower for the hydrogen-ammonia project was slowly lifted and moved steadily until it was accurately placed in position. The entire process took about 2 hours. Thanks to the joint efforts of the on-site staff, the entire lifting process was carried out smoothly and in an orderly manner, with all safety measures and management procedures properly implemented. The shift gas scrubber of the hydrogen-ammonia project is the heaviest piece of equipment in the entire plant; the successful lifting of this unit has laid a solid foundation for the subsequent installation of other equipment.
The large-scale equipment lifting project at Guangxi Hengyi’s factory involves 105 pieces of equipment, with the lifting process needing to be completed within 4 months. Seventeen of these devices are lifted using 4000T crawler cranes, accounting for 16% of the total; the net weight of each individual device ranges from 300 to 700 tons； There are 25 pieces of equipment that use 800T crawler cranes as their main lifting mechanism, accounting for 24%; the net weight of each such piece of equipment ranges from 100 to 300 tons ； There are 63 pieces of equipment that use crawler cranes or truck cranes with a capacity of 400T or less as the main lifting devices; the net weight of each such device is around 100 tons, accounting for 60% of the total. Taking large-scale lifting as its core focus, Guangxi Hengyi began formulating plans for the lifting of large-scale equipment for key units such as hydrogen ammonia, cyclohexanone, and hydrogen peroxide as early as half a year ago. A thorough lifting plan is developed for each piece of equipment, covering aspects such as the lifting scheme, arrival of the equipment, routes both inside and outside the factory, road grading, construction allowances, as well as the preparation of pipelines attached to the tower. Led by the company’s engineering department, a special task force for planning and implementing the heavy lifting plan was formed, bringing together representatives from the equipment department, safety and environmental protection department, process workshop, construction unit, shipping unit, supervision unit, and the procurement department of the engineering company. Regular meetings were held on a weekly basis to address the key challenges and difficulties in terms of safety, quality, cost, and schedule associated with heavy lifting operations. On January 24, the \"Overall Construction Technical Plan for the Lifting of Large-scale Equipment for the 1.2 million tons per year caprolactam-polyamide integrated production project in Guangxi Hengyi\" was approved by experts, providing technical support for the implementation of the project. Lifting large-scale equipment is a high-risk engineering activity. After the technical plan is finalized, a dedicated team responsible for the planning and execution of such lifts conducts regular tabletop simulations to clarify each person’s responsibilities. Practical drills are carried out repeatedly on-site; any issues that arise are addressed promptly, and the details of the plan are adjusted and optimized accordingly. This iterative process ensures that all critical aspects are taken into account.
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