【Ten Years of Great Progress in Chemical Technology】058- In 2019, China’s first thousand-ton-class circulating bed gasification unit was successfully delivered to the ammonia synthesis industry

Currently, nitrogen fertilizer manufacturers that use fixed-bed gasifiers to supply raw gas to ammonia synthesis plants account for 40% of China’s ammonia synthesis capacity. Due to severe pollution, the Ministry of Ecology and Environment has required that, in accordance with the environmental warning levels, 50% of the fixed-bed gasifiers used in the nitrogen fertilizer industry be shut down, or even all of them. Every winter is a period with a high incidence of environmental warnings, and the shutdown of many nitrogen fertilizer manufacturers creates a significant conflict with the supply of fertilizers needed for agricultural planting in spring. 　　Gansu Jinhua Group’s 200,000 tons per year synthetic ammonia production line uses a circulating bed pressurized gasifier to generate the raw material gas, replacing the traditional fixed bed gasifiers. This setup enables zero emissions of waste gas or wastewater, completely eliminating the pollution problems associated with fixed bed gasifiers. Moreover, since it is possible to utilize locally available coal of poor quality that is difficult to gasify using conventional techniques, the cost of coal usage is reduced by 30% to 50%, saving the company nearly 50 million yuan in costs (accounting for 15% of the company’s total production costs), thereby helping the company overcome its financial difficulties. 　　Over the past three decades, the Institute of Engineering Thermophysics of the Chinese Academy of Sciences has been dedicated to the clean and efficient utilization of coal. To address the issues associated with traditional coal gasification technologies, such as limited suitable coal types, high pollution levels, or high costs, it has developed the CGAS (Circulating Bed Gasification) technology, which is clean, efficient, low-cost, and adaptable to a wide range of coal types. Since 2004, through pilot tests, pilot-scale trials, industrial tests, and engineering demonstrations, a series of test platforms have been designed and built. Mechanism research, process development, breakthroughs in key technologies, and the development of complete sets of technical products have been successfully carried out. Technical demonstrations of the first circulating fluidized bed gasifiers of various grades in China have been achieved; these systems are widely used by leading enterprises in the non-ferrous metallurgy and ceramics industries, and they have also entered the international market, being exported to countries along the Belt and Road Initiative. To date, 70 sets of such technical products have been put into industrial use, generating an output value of 3.3 billion yuan; they enable the reduction of 2.6 million tons of wastewater containing tar and phenols each year. Given the significant contribution of this technology to serving the national economy, the research and development team was awarded the Chinese Academy of Sciences Award for Science and Technology for Development in 2019. 　　The thousand-ton-class circulating bed pressurized gasification unit delivered this time is China’s first demonstration project for low-rank coal circulating bed pressurized gasification; it supplies raw material gas to ammonia synthesis manufacturers under a contract energy management arrangement. This project is also a demonstration project under a key initiative aimed at the transfer and application of scientific and technological achievements by the Chinese Academy of Sciences.

【Ten Years of Great Progress in Chemical Engineering Technology】The World’s First Ultra-Large-Scale Dual Fluidized-Bed Powder Coal Gasification (KSY) Experimental Unit from 2006 to 2019 https://bbs.hcbbs.com/thread-3644115-1-1.html (Source: Huahai Chuanliu – Haichuan Network)

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In December 2019, China’s first thousand-ton-class circulating bed gasification unit, developed by the Institute of Engineering Thermophysics of the Chinese Academy of Sciences, was officially delivered to its user in Jinchang, Gansu.