Thread Content
【Oriental Furnace】Baling Petrochemical’s 600,000-ton caprolactam project for polyamides has reached completion! Test runs in progress. Author/Source: Gasification World. Date: 2023-06-07. Clicks: 15. It has been learned recently that the project for the relocation, upgrading, and transformation of Baling Petrochemical’s production facility for caprolactam, with an annual capacity of 600,000 tons, is now 98.8% complete; the newly built units are gradually being handed over and are entering the preparation for production or trial operation phase. On May 31, 2023, the polyamide unit of Baling Petrochemical’s project for the relocation, upgrading, and transformation of its production facility for 600,000 tons of caprolactam per year was successfully commissioned. The facility has moved from the construction phase to the production preparation phase. The polyamide facility is the largest single building in this project; its framework is 88 meters long, 44 meters wide, and 45 meters high, with a total of 7 floors. On May 30, the coal storage and transportation system was successfully commissioned, creating favorable conditions for the operation of the gasification unit and power station as part of the relocation and upgrading project. The coal storage and transportation system supplies coal of appropriate particle size as raw material and fuel for the gasification units and power stations in the relocation and upgrading projects. Its storage facilities consist of 2 circular stockyards with a diameter of 90 meters; each stockyard can store approximately 80,000 tons of a single type of coal. On May 30, the monitoring tank of the water treatment plant began to receive water from previous processing stages steadily, and the water interconnection test of the concentrated water treatment unit was successful on the first attempt, laying the foundation for the full operation of the project in the future. The concentrated wastewater treatment unit is the first environmental protection facility to be put into operation for wastewater treatment in the caprolactam relocation project; it is primarily responsible for treating the highly saline concentrated wastewater generated from dual-membrane reclaimed water reuse, wastewater from circulating water systems, and wastewater from the chemical water treatment station. On May 26, Line A of the two hydrogen peroxide production units began the acid washing and passivation process, marking the start of the preparations for commissioning. It is expected that the acid washing and passivation of the two hydrogen peroxide units will be completed within 1 month. The project involves the construction of two new facilities (A/B), each with an annual production capacity of 120,000 tons of hydrogen peroxide, utilizing process technologies owned by Sinopec and covered by independent intellectual property rights. At 18:00 on May 24, after 99 steam purging tests, the cleanliness of the main steam pipeline connecting Boiler No. 3 in the power station of the Baling Petrochemicals’ project for the relocation, upgrading, and transformation of its production facility capable of manufacturing 600,000 tons of caprolactam per year was found to be satisfactory, meeting the requirements for use. The successful purging and testing of the first high-pressure pipeline in this project indicate that Boiler No. 3 is now capable of producing qualified steam, laying a solid foundation for completing the purging within the facility as well as supplying clean steam externally at an early date. The Baling Petrochemical caprolactam industry chain relocation, upgrading, and transformation project utilizes SE water-coal slurry gasification to produce 333,000 tons of liquid ammonia per year, 240,000 tons of hydrogen peroxide, 660,000 tons of sulfuric acid, 600,000 tons of caprolactam per year, and 150,000 tons of polycaprolactam. Project Overview: According to the environmental impact assessment documents published by the Hunan Department of Ecology and Environment, the Baling Petrochemical caprolactam production project involves the construction of a facility with an annual capacity of 600,000 tons of caprolactam. It mainly includes air separation, coal gasification, hydrogen peroxide, **, ammonia oximation, caprolactam, polyamides, and sulfuric acid plants. The caprolactam production units are located centrally in the plant area, divided into Line A and Line B. Line A and Line B are arranged parallel to each other. Images: Process technology and equipment configuration; Air separation – the scale of the air separation unit is 90,000 m3/h of oxygen. Construction of Line A. Coal-to-hydrogen capacity: 192,000 m3/h (CO+H2). Gas is produced using water-coal slurry, with ammonia synthesis gas and hydrogen generated as by-products for supply to downstream industries. Construction of Line A. Synthetic ammonia is produced using nitrogen and hydrogen from coal-based hydrogen production facilities, with an annual output of 333,000 tons of liquid ammonia. Construction of Line A. Hydrogen peroxide is produced using the “slurry-bed palladium-catalyzed anthraquinone process”. Line A is constructed to produce 120,000 tons of hydrogen peroxide per year. The scale and process of the B-line hydrogen peroxide facility are the same as those of the A-line. A total of 240,000 tons per year. Sulfur-based sulfuric acid production uses a \"two rotation two absorption\" process, with an annual output of 660,000 tons of 104.5% sulfuric acid. Construction of Line A. Caprolactam is synthesized from raw materials such as benzene, hydrogen, hydrogen peroxide, and ammonia, through processes including esterification, amination (including rearrangement), ammonium sulfate recovery, and caprolactam purification. Line A is built to produce 300,000 tons of caprolactam per year. The scale and process of Line B caprolactam are basically the same as those of Line A. A new oxidation **unit** has been added to produce **in-house**, thereby eliminating the need to purchase it from Line A. A total of 600,000 tons per year. Polyamides are produced using caprolactam as a raw material, with an annual production capacity of 150,000 tons of polycaprolactam. Construction of Line A. The total investment in the relocation, upgrading, and transformation project of the caprolactam production chain at Baling Petrochemical amounts to 13.95 billion yuan. This project aims to establish a caprolactam production capacity of 600,000 tons per year, covering the entire production chain from coal-to-hydrogen production to polyamide manufacturing. The process units to be built utilize new technologies developed by Sinopec, including those related to hydrogen peroxide use. This project has been included by the headquarters in the list of key projects for 2020, and it is also listed as a key project in Hunan Province as well as one of the \"Five 100\" major industrial projects.