[Ocean Chemical News] Shaanxi Coal Chemical Industry plans to build a 300,000 tons/year synthetic ammonia and 520,000 tons/year urea project from blue carbon tail gas

Through discussions and exchanges, the two parties finally unanimously determined the product plan for the annual output of 300,000 tons of synthetic ammonia, 520,000 tons of urea, and the by-product of 100,000 tons of LNG, as well as the process technology route of low-temperature methanol washing, desulfurization and decarbonization + cold box separation of methane and nitrogen. They also determined the plant construction conditions, public works and other practical issues, which provided a solid guarantee for the preparation of the project feasibility study report. Saiding Engineering Co., Ltd. is very professional and in-depth in the preliminary technical investigation and process route comparison of this project. By leveraging their rich engineering design experience accumulated in Lurgi furnace gasification, coke oven gas and submerged arc furnace exhaust gas utilization, they are fully capable of completing the feasibility study design of the project. Saiding Company believes that the low price of raw gas for this project has a cost advantage of more than 600 yuan per ton of liquid ammonia compared with coal head gasification. The project will have strong profitability after it is completed and put into operation. It is reported that the Shaanxi Coal and Chemical Industry Group Blue Carbon Circular Economy Industry Chain Upgrading Demonstration Project will build a 5 million tons/year coal quality comprehensive utilization production device, a 300,000 tons/year synthetic ammonia production device, etc., with a total investment of 6.2 billion yuan. After the project is completed, it will become a model project and demonstration project for the blue carbon industry upgrade. The 300,000 tons/year synthetic ammonia and 520,000 tons/year urea project from blue carbon tail gas belongs to the second phase of the company's 5 million tons blue carbon upgrade demonstration project, and is expected to officially start construction next year. This technical exchange will make solid and effective preliminary preparations for project construction and provide sufficient demonstration work for project approval.

What is blue charcoal? Blue charcoal is made by firing high-quality Jura coal blocks produced in the Shenfu Coalfield. It has a massive structure, a particle size generally above 3cm, and a light black color. It has the characteristics of high fixed carbon, high specific resistance, high chemical activity, low ash content, low aluminum, low sulfur, and low phosphorus.

Yulin blue charcoal, named for its blue flame, is a clean and environmentally friendly fuel produced by retorting and pyrolysis of high-quality Jurassic clean coal abundant in Yulin under medium and low temperature conditions. It has the unique advantages of "three highs and four lows" such as high fixed carbon, high chemical activity, high specific resistance, low ash, low aluminum, low sulfur, and low phosphorus. Its combustion indicators and emission indicators are better than other coal types. Historically, people in Shenfu and surrounding areas in northern Shaanxi called the 'residue charcoal' left after burning coal and emitting black smoke as blue charcoal. Some folk craftsmen used the high calorific value of blue charcoal to forge metal, and some people used charcoal pots for heating and baking sesame cakes. In the early 1980s, the Shenfu coalfield was developed and a number of small foundries and iron smelting plants were built locally. Due to the lack of metallurgical coke in Shenmu, earth-made blue charcoal was used instead of metallurgical coke. Since then, in order to reduce production costs, local calcium carbide factories and ferrosilicon factories have successively used blue charcoal to replace anthracite and metallurgical coke. This has not only reduced costs and increased efficiency, but also greatly improved product quality. As a result, blue charcoal has been rapidly promoted and applied in the calcium carbide and ferrosilicon industries.

After more than 20 years of development, Yulin Lantan has relied on the construction of high-end energy and chemical bases and high-quality and large-scale coal resources. After the primary production stages of French, flat box and vertical production, after three closures, integration and upgrades, new breakthroughs have been made in the construction of production technology and environmental protection facilities. It has broken through and formed a comprehensive circular economy industrial chain in various forms such as "coal-blue charcoal-power generation, coal-blue charcoal-coal tar-clean fuel oil, coal-blue charcoal-energy-carrying industrial products" led by blue charcoal production, becoming the largest and most technologically advanced coal pyrolysis industry cluster in China. In 2008, "Yulin Lantan" was listed by the Ministry of Industry and Information Technology * * Industrial Policy Directory Coke Series, 2010 * * General Administration of Quality Supervision, Inspection and Quarantine * * The Standards Committee jointly issued the national standards for blue charcoal, "Technical Conditions for Coal Use of Blue Charcoal", "Technical Conditions for Blue Charcoal Products" and "Classification of Blue Charcoal Product Varieties and Grades". In 2012, “Shen Mulan Tan” was successfully registered * * Geographical indication certification mark.

At present, Yulin has become the main blue charcoal production area in the country, with a production capacity of 50 million tons. Its production capacity and output account for more than 60% of the national market. Focusing on blue charcoal production, processing, transformation, transportation, sales, scientific research and other links, the output value of the "Yulin blue charcoal" industry has exceeded 10 billion yuan. “"Yulin Lantan" has a wide range of applications: The first is application in the ironmaking field. “"Yulin Lantan" has been subjected to industrial trials in many steel plants. Its application areas include blast furnace injection, replacement of coke, sintering fuel, and carbon-containing pellet reducing agent. The results show that the blast furnace operates stably with small fluctuations, and can significantly reduce ironmaking costs. The second is application in the field of clean fuel. “Yulin blue charcoal's combustion index and emission index are better than other coal types. Burning blue charcoal is more beneficial to the environment and can greatly reduce the emission of harmful substances. At present, "Yulin Lantan" has been listed as a clean fuel research * * Basic research projects. In addition, blue charcoal can also be used as a raw material for preparing activated carbon.

Can industrial exhaust gas, a by-product of intermittent industrial production, be used as chemical raw materials for continuous production of chemical projects?