Thread Content
On July 12, 2015, the China Petroleum and Chemical Industry Federation organized a panel of academicians and experts to form an appraisal committee, which conducted an evaluation of the scientific and technological achievements related to the project \"Integrated Gasification-Low-Rank Coal Pyrolysis Technology (CGPS) Industrial Test,\" carried out jointly by the Shaanxi Coal and Chemical Technology Research Institute and Beijing Collinsda Technology Development Co., Ltd., in Beijing. The appraisal committee is composed of 9 renowned experts, including Xie Kechang, Ni Weidou, and Jin Yong, who are academicians of the Chinese Academy of Engineering, as well as Men Cungui, a professor-level senior engineer from the Consulting Center of CNPC, and He Yongde, a professor-level senior engineer from the Shaanxi Chemical Industry Society. The meeting was chaired by Wang Xiujiang, deputy director of the Science, Technology and Equipment Department of the China Petroleum and Chemical Industry Federation. Attendees included Li Jinzhu, deputy director of the Shaanxi Provincial People’s Congress; Hu Qianlin, deputy secretary-general of the China Petroleum and Chemical Industry Federation; Hua Wei, Party secretary of Shaanxi Coal and Chemical Industry Group Co., Ltd., Yan Guanglao, general manager of the same company, and Shang Jianxuan, deputy general manager; Min Xiaojian, director of Shaanxi Coal and Chemical Industry Technology Research Institute, and Zheng Huaan, deputy director; as well as Wang Longguo, chairman of Beijing Collinsda Technology Development Co., Ltd., and Guo Hongchang, general manager of the same company. “The \"Industrial Test of Gasification-Low-Rank Coal Pyrolysis Integrated Technology (CGPS)\」was carried out jointly by Shaanxi Coal and Chemical Technology Research Institute Co., Ltd. and Beijing Collinsda Technology Development Co., Ltd. The process of this project utilizes the high-temperature gas generated by the gasification of semi-coke powder as a heat carrier for pyrolysis, employing reverse cascade direct-contact pyrolysis to achieve efficient and rational use of the sensible heat in that high-temperature gas, as well as staged pyrolysis of low-rank coal. The quality of the pyrolyzed products is good, and the recovery rate is high ； A new type of belt-type pyrolyzer suitable for the characteristics of this process has been developed, comprising four stages: drying, low-temperature pyrolysis, medium-temperature pyrolysis, and waste heat recovery. The drying stage allows for independent water removal, facilitating its reuse; staged feeding ensures homogeneous pyrolysis and the formation of a particle bed for the high-temperature pyrolysis gases. Efficient self-dust removal is achieved, and cold gas is used for quenching coke, thus enabling the recovery of waste heat ； Self-produced cyclic coal tar is used to absorb tar from hot gas, supplemented by electrostatic tar capture technology, resulting in a high tar recovery rate and a significant reduction in wastewater compared to traditional processes. The industrial test unit built using this technology, with an annual processing capacity of 10,000 tons of raw coal, has shown, as demonstrated by project evaluations, that it operates stably. The main units in the process flow as well as the automatic control systems are advanced and rational. The energy utilization efficiency of the raw coal is 92.5%, the yield of pyrolyzed semi-coke is 57.84%, and the yield of tar on a dry basis is 9.07% (which is 92.6% of the yield of tar from similar types of coals). The gas production volume is 309.17 Nm3 per ton of coal. At the meeting, the evaluation committee reviewed the relevant technical documents and listened to the presentation by the project team. After inquiries and thorough discussions, the committee unanimously agreed that this technology has advanced the research and development of processes for producing high-quality tar and gas through the directed pyrolysis of low-grade coal. According to the literature review, the integrated gasification-lower rank coal pyrolysis technology (CGPS) is internationally pioneering and holds a leading position; approval for evaluation is granted. It is recommended to further strengthen basic research, optimize technical approaches and process conditions, improve the process parameters of products, and achieve breakthroughs as soon as possible in the technology for producing high-quality tar and gas through the directed pyrolysis of low-rank coal, so as to enable industrial-scale operation and lay the foundation for its widespread application in industry.