CCCC for the chemical water treatment station in Guangxi Hengyi New Materials’ 1.2 million-ton caprolactam-polyamide integrated production facility and related projects

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At 8:18 on December 12, 2024, the Chemical Water Treatment Station (Phase I) of Guangxi Hengyi New Materials Co., Ltd.’s integrated production facility for 1.2 million tons per year of caprolactam and polyamide – part of the project’s utility systems – was delivered on schedule. This is the second process unit to progress to the commissioning stage following the delivery of the Water Treatment Station (Phase I); it addresses the issue of supplying high-quality desalinated water for this project, providing the necessary chemical water resources for the commissioning and operation of units such as steam turbines and chemical reactors, thereby enabling the project to move from the construction phase to the preparation stage for production. As a key auxiliary facility, the chemical water treatment station is responsible for converting industrial water into demineralized water, as well as for the recovery and further treatment of condensate, thereby enabling maximum utilization of water resources. The unit integrates systems such as membrane treatment, condensate recovery, and EDFT. Multiple desalination technologies such as ultrafiltration, reverse osmosis, and EDI are employed, while equipment like oil and iron removal systems, activated carbon filters, precision filters, and deaerators are used to ensure that the water quality meets the required standards. The first pile for this facility was driven in October 2023; it was handed over for safety checks in April 2024, and was successfully completed on December 12, 2024. The amount of non-standard equipment installed on-site is approximately 1,000 tons. Adhering to the EPC integrated model, it incorporates 171 core and auxiliary devices, which are connected by a pipeline network of nearly 60,000 meters; in addition, nearly 130,000 meters of control and power cables are used, enabling a daily water production capacity of 30,000 cubic meters. Guangxi Hengyi hydrogen peroxide utilizes the fluidized bed process technology independently developed by Hengyi Research Institute; this is the first industrial-scale installation based on Hengyi’s own process technology for hydrogen peroxide production. Industrialized devices have advantages such as small size, high equipment operation efficiency, and good safety performance. The integrated hexamethylene imide-polyamide production facility with an annual output of 1.2 million tons, as well as the associated coal-based hydrogen production and ammonia synthesis units at Guangxi Hengyi New Materials Co., Ltd., utilize two Aerospace Maiwei pulverized coal semi-waste boiler gasifiers to produce 100,000 m3/h of hydrogen and 200,000 tons per year of ammonia. The Guangxi Hengyi New Materials project, which focuses on the integrated production of 1.2 million tons of caprolactam and polyamides per year, has a total investment of around 22 billion yuan. Once operational, it will be able to produce 1.2 million tons of polyamide chips annually, generating annual sales revenue of about 20 billion yuan and annual tax revenues of 1.8 billion yuan. One phase of this investment amounts to around 12 billion yuan, covering an area of 1,700 mu. The construction includes facilities for producing 600,000 tons per year of **, 1.2 million tons per year of hydrogen peroxide, 200,000 tons per year of synthetic ammonia, 600,000 tons per year of caprolactam, as well as 600,000 tons per year of polyamide. The second phase of the project involves the construction of 1 set of hydrogen peroxide production facility with an annual capacity of 400,000 tons (based on 35% concentration), 2 sets of olefinic **production facilities with an annual capacity of 300,000 tons each, 2 sets of caprolactam production facilities with an annual capacity of 300,000 tons each, and 5 sets of polyamide polymerization facilities with an annual capacity of 120,000 tons each. The construction period for Phase II is 24 months, with commissioning expected in 2025.