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Casting large-scale drying equipment "China Core"
The National Drying Technology and Equipment Engineering Technology Research Center, established by the Tianhua Chemical Machinery and Automation Research and Design Institute, has been actively advancing its engineering and technology development tasks since it was officially approved by the Ministry of Science and Technology in November of last year. The center has focused on major national projects, achieving significant progress in the localization of drying technology and equipment. Notably, the coal moisture control device for coke ovens in the iron and steel industry, as well as the one-million-ton PTA (purified terephthalic acid) drying technology and equipment for the petrochemical sector, have reached advanced international standards.
Following the successful implementation of the PTA dryer developed by the National Drying Center at Sinopec Luoyang Branch's 325,000 tons/year PTA plant, the center continued to explore the theoretical foundations of CTA/PTA (crude terephthalic acid/p-terephthalic acid) drying. Through industrial testing, validation, and model refinement, they gained deep insights into the key technologies involved in the design of CTA/PTA drying processes and equipment. In 2007, the center delivered a 600,000-ton/year CTA/PTA dryer for Jialong Chemical Fiber Corporation.
In February 2008, the center also secured a contract to develop the CTA/PTA dryer for Sinopec Yizheng Chemical Fiber’s 1 million tons/year PTA project. This project utilizes China’s own intellectual property process technology, with the supporting CTA/PTA dryer being the largest steam tube rotary dryer independently developed in China. The dryer is scheduled for delivery and installation in March 2009.
The coking coal moisture control technology aims to improve coal quality and reduce consumption by lowering the moisture content from 10% to 6% through heat exchange, thus reducing heat loss in coke ovens and enhancing coke quality. The National Drying Center’s steam drying technology uses low-pressure steam from dry quenching as a heat source, employing an efficient steam pipe rotary dryer for indirect heat exchange with wet coal, along with a dust recycling system. This technology has been widely adopted in domestic steel plants such as Baoshan Iron & Steel Co., Ltd., Shanxi Huijin Stainless Steel Co., Ltd., and Panzhihua Iron & Steel Co., Ltd., due to its energy-saving, environmentally friendly, and economically beneficial performance.
In January 2008, the 330 tons/hour coal moisture conditioning system project at Baoshan Iron and Steel Group entered on-site installation. The main drying equipment is expected to be operational by August 2008, potentially reducing coke oven fuel consumption by 2–3 kg/ton after commissioning. The 400 tons/hour coal moisture control device at Shanxi Huijin Stainless Steel is in the assembly phase, with plans for on-site installation and commissioning in March 2008. Taiyuan Iron and Steel Company has implemented this technology, expecting a 30% reduction in coke oven fuel use and a 30–40% decrease in coking wastewater. Meanwhile, the 350 tons/hour humidity control device for Panzhihua Iron and Steel’s coking furnace renovation project is in the design stage, with the main dryer expected to be installed by October 2008.