Coal to Liquid, China Leading the New Track - Record of the World's Largest Single Unit Coal to Liquid Project
2023-11-10
Hundreds of meters tall towers stand shoulder to shoulder, spherical tanks are scattered, and endless pipelines crisscross... Walking into the factory area of the 4 million ton/year indirect coal liquefaction demonstration project of National Energy Group Ningxia Coal Industry Co., Ltd. (hereinafter referred to as "Ningxia Coal Industry"), the magnificent scene of modern large energy source enterprises is overwhelming. This is the largest and most invested coal to liquid project in the world. China is rich in coal, poor in oil, and lacking in gas. In recent years, the dependence on foreign oil has continued to rise. If we can use our own technology to turn coal into oil, our energy security will be more guaranteed. On November 9th, in an interview with a reporter from Science and Technology Daily at the production site, Yao Qiang, Deputy General Manager of Ningxia Coal to Liquid Branch, talked about the original intention of this project's construction. In order to build a "ballast stone" for China's energy security, the National Energy Group is committed to tackling key issues and vigorously opening up a new track on the basis of direct liquefaction of coal to liquid, so that China can reach the international leading level in large-scale indirect liquefaction of coal to liquid complete technology. Compared to direct liquefaction of coal to oil, indirect liquefaction of coal to oil has the characteristics of wide adaptability to coal types and mild synthesis conditions when overcoming the problem of ignition burners. The first step in indirect liquefaction of coal to oil is to convert coal into synthetic gas. The gasification of coal cannot be separated from the gasifier, and one of the core components of the gasifier is the ignition burner. In the past, the ignition burners of China's gasifiers were mainly imported from abroad. However, imported ignition burners were not only expensive, but once they broke, they needed to be sent abroad for repair. Sometimes they could not be returned after being sent out for a month or two. We really can't afford to wait for such a long time! "Yao Qiang said bluntly. In 2009, the research team of Ningxia Coal Industry made up their mind to overcome the "bottleneck" problem of ignition burners through independent innovation. However, the path to the pinnacle of technology cannot be a smooth one. At the beginning, the ignition burner they developed could only burn for a few seconds. At that time, we encountered a contradiction: if the lifespan of the ignition burner was extended, the ignition composition would decrease, causing it to not ignite; while if the ignition composition increased, the lifespan of the ignition burner would be shortened. "Yao Qiang introduced," These two were like seesaws. We experimented hundreds or thousands of times, but we couldn't find a 'balance point'. "Without breakthroughs in tackling the problem, frustration was inevitable. Recalling that time, Yao Qiang said that staying up late and working overtime was the norm. "We are not afraid of working overtime, we are not afraid of staying up late, we are afraid of going through it without a head, we don't know when it is the end point, and the pressure is very high. Fortunately for Yao Qiang, "everyone is pushing towards the same goal, and no one has given up. The experiment has been conducted for nearly 3 years, and by continuously adjusting the ignition composition ratio, Yao Qiang and his research team finally developed the first generation of ignition burners in 2011. Although the combustion life of this generation of ignition burners is not very long, only about 100 days, it shows us the long-awaited dawn, "Yao Qiang said. Next, the combustion time of the ignition burner continued to extend -180 days, 200 days, 230 days, until now it is over 250 days. After removing the catalyst "roadblock" from coal gasification, the next step is to use the catalyst to liquefy synthetic gas into oil. In this process, catalysts are crucial. Although the catalyst is very small, its particle diameter is only a few tens to over 100
Edit：Ling Xiaotong Responsible editor：Li Yi
Source：TechWorld
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