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The clean fixed-bed gasification technology has gained widespread recognition, and Dongguang Chemical has blazed a new path for environmental protection! Author/Source: Shanghai Jingye Environmental Protection Date: 2020-11-13 Clicks: 291 On November 9–10, officials from organizations such as the China Nitrogen Fertilizer Association, the Raw Materials Industry Department of the Ministry of Industry and Information Technology, and the Atmospheric Environment Department of the Ministry of Ecology and Environment, along with representatives from nitrogen fertilizer manufacturers across the country that use fixed-bed intermittent gasification technology and from companies involved in related equipment and technology, gathered in Cangzhou, Hebei Province, to attend a seminar on environmental improvement approaches for fixed-bed gasification technology. They also visited the first-of-its-kind “constant-pressure fixed-bed intermittent gasification technology demonstration unit without phenol-cyanamide-containing waste gas emissions” operated by Hebei Dongguang Chemical Co., Ltd. (hereinafter referred to as Dongguang Chemical). With the support and promotion of the China Nitrogen Fertilizer Association, this set of equipment was developed jointly by Dongguang Chemical, Shanghai Jingye Environmental Protection Energy Technology Co., Ltd. (hereinafter referred to as Shanghai Jingye), and Hebei Zhengyuan Design Institute. It achieves zero emissions of wet sludge and VOCs, as well as compliant wastewater discharge, setting a model project and transformation approach for environmental upgrades using fixed-bed technology in the entire industry. As the most reliable approach for upgrading fixed-bed systems, this technology is considered to have advantages such as a short upgrade period, low investment costs, and rapid results; it has received high recognition from representatives of the Nitrogen Fertilizer Association and relevant departments. By addressing the environmental issues that have long plagued users of fixed-bed systems, it should be widely promoted. We have learned that over the past year since the operation of China’s first \"constant-pressure fixed-bed intermittent gasification technology demonstration unit for cooling tower exhaust gas treatment, free of phenol, cyanide, and ammonia\", installed by Hebei Dongguang Chemical, all performance indicators have been normal. The problems that have plagued fixed-bed gasification processes, such as carbon-containing wet slag, black water, and VOCs, have been resolved. The quality of the additional condensed water has improved significantly, and it can meet emission standards after just one stage of water treatment. At present, this environmental improvement project is still in progress at Dongguang Chemical’s Second Plant. By early November 2020, Dongguang Chemical will have completed the renovation of all 42 gas generation furnaces in the plant, building on the 24 furnaces that were already upgraded in the First Plant in 2019. As a result, Dongguang Chemical will become the first company in the country to complete environmental upgrades for its fixed-bed gasification processes. At the National Symposium on Environmental Improvement Approaches for Fixed-Bed Coal Gasification Technology, Mr. Zhou, the chairman of Shanghai Jingye, delivered a keynote speech titled \"Introduction to the Environmental and Energy-Saving Modification Processes for Pressure-Atmosphere Fixed-Bed Coal Gas Production: Using Quantitative Data to Support a Scientific Assessment of Such Modifications.\" In his speech, he discussed the application of Shanghai Jingye’s core technologies in the fixed-bed gasification system upgrades at Dongguang Chemical, and introduced the company’s Coal Gas Multi-Pollutant Purification System 2.0 to the leaders and experts present. This presentation received strong feedback from the experts, and many enterprise representatives expressed a keen interest in cooperating with Shanghai Jingye. At present, this advanced process is also being vigorously promoted in China’s largest fixed-bed process bases, such as Jincheng in Shanxi and Shandong. At present, four fixed-bed environmental improvement projects for Lanhua Group’s Tianyue Branch, Lanhua Coal Chemical Co., Ltd., and Shandong Jinmei Riyue Co., Ltd. are under construction – the designs were provided by Hebei Zhengyuan, while Shanghai Jingye Environmental Protection is responsible for the implementation of these projects. It is expected that they will be operational by the end of 2020. As early as the end of May 2020, officials from the Jincheng Environmental Protection Bureau and the Industry and Information Technology Bureau led a team that included representatives from Lanhua Group and other major fixed-bed enterprises in Jincheng to conduct on-site inspections in Dongguang. They highly praised the demonstration unit for the atmospheric-pressure fixed-bed intermittent gasification technology used by Dongguang Chemical for treating exhaust gases from cooling towers that do not contain phenol, cyanide, or ammonia. It is believed that this system represents an excellent approach for rapidly reducing the total amount of pollutants under the current challenging circumstances. Coal-based nitrogen fertilizer manufacturers in Jincheng City should also accelerate the environmental improvement of their fixed-bed batch gas production processes and implement such improvements as soon as possible. http://img.yf116.cn/image/img/20201113/110143961491.jpg Conclusion: Fixed-bed batch gasification technology has evolved significantly over time. At Dongguang Chemical, clean fixed-bed coal gasification technology is now on par with modern gasification techniques, playing a vital role in ensuring the healthy development of China’s nitrogen fertilizer industry. More than a year of operation over a long period has shown that the environmental improvement upgrades for the fixed-bed coal gasification process are now mature. The Dongguang model proves to be effective and practical, featuring a short renovation period, minimal downtime, a high level of automation, and enhanced safety. It meets the needs of maintaining production and ensuring job stability in the current context. Compared to replacing the gasification process furnaces, it requires a lower budget for upgrades, making it economically advantageous. Fixed-bed enterprises that are capable of undergoing upgrades should take action promptly to carry out environmental protection improvements, thereby securing greater opportunities for their future development.