National key casting large drying equipment "China Core"

Since the official approval of the National Drying Technology and Equipment Engineering Technology Research Center by the Ministry of Science and Technology in November last year, the institute has been actively advancing its engineering technology development tasks. Leveraging large-scale national key projects, the center has made significant progress in localizing drying technology and equipment. Notably, the coal moisture control device for coke ovens in the steel industry and the million-ton PTA (purified terephthalic acid) drying technology and equipment in the petrochemical sector have reached advanced international standards. Following the successful application of the PTA dryer developed by the National Drying Center at Sinopec Luoyang Branch's 325,000 tons/year PTA plant, the team continued to explore the theoretical foundations of CTA/PTA (crude terephthalic acid/fine terephthalic acid) drying. Through extensive industrial testing, they validated a comprehensive mathematical model for CTA/PTA drying and mastered the core technologies involved in the process and equipment design. In 2007, the center took over the production of a 600,000 tons/year PTA unit CTA/PTA dryer from Jialong Chemical Fiber Co., Ltd. In February 2008, the center signed a contract to develop a CTA/PTA dryer for the 1 million tons/year PTA project at Sinopec Yizheng Chemical Fiber. This project is based on China’s independently developed intellectual property technology, with the supporting CTA/PTA dryer being the largest steam tube rotary dryer developed domestically. The dryer is scheduled for delivery and installation in March 2009. Coke oven coal conditioning is an energy-saving and efficiency-enhancing technology that reduces coal moisture from 10% to 6% using heat exchange, thereby minimizing coke heat loss and improving coke quality. This ensures stable and continuous operation of coke ovens. The National Drying Center developed a steam tube rotary drying method for this technology, utilizing low-pressure steam from dry quenching as a heat source. The system performs indirect heat exchange with wet coal through a high-efficiency steam tube dryer, while also supporting dust recovery and treatment systems. This technology has been successfully applied in several major steel companies, including Baoshan Iron and Steel, Shanxi Huijin Stainless Steel, and Panzhihua Iron and Steel, delivering notable energy savings, environmental benefits, and economic returns. In January 2008, the 330 tons/hour coal moisture control system project at Baoshan Iron and Steel Group was put into field installation. The main equipment is expected to be operational by August 2008, potentially reducing coke oven fuel consumption by 2–3 kg per ton. Meanwhile, the 400 tons/hour coal moisture control system at Shanxi Huijin Stainless Steel entered the equipment assembly stage, with field installation and commissioning planned for March 2008. Once operational, the system at Taiyuan Iron and Steel is expected to save 30% in coke oven fuel and 30–40% in coking wastewater. Additionally, the 350 tons/hour humidity control unit for Panzhihua Iron and Steel’s coke oven reconstruction project is currently in the design phase, with the main dryer expected to be delivered by October 2008.

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