【Ten Years of Great Progress in Chemical Engineering Technology】Solid slag discharge Y-type fluidized bed gasification technology was approved between 2023 and 2036

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Ten years of rapid development in chemical engineering technology – praising the prosperity and strength of modern China. This is just a starting point; more participation will make things even more lively. With you here, HaiChuan becomes even better. [Ten years of development in chemical engineering equipment] – continuous updates and summaries available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html. Enhance quality awareness and promote high-quality development. ----------------------------------------- In August 2023, the project \"Research, Development, and Demonstration of Y-type Fluidized Bed High-Temperature Zone Gasification Technology with Solid Slag Discharge\", carried out jointly by China University of Petroleum (East China) and Jinan Huangtai Gas Stove Co., Ltd., passed the evaluation of scientific and technological achievements organized by the China Petroleum and Chemical Industry Federation in Beijing. The evaluation committee believes that this technology features a high carbon conversion rate, as well as water and energy savings, and is generally at the international leading level. 　　The outcomes of this project yielded three technological innovations: First, research was conducted on the physicochemical properties, thermal reaction mechanisms, and kinetics of components within coal chemical groups, raising the study of coal structure and reactivity from a macroscopic level to a molecular level. This led to the development of a new research framework in molecular coal chemistry based on chemical group composition, providing a theoretical basis for the clean and efficient utilization of coal in both its role as a fuel and as a raw material. Secondly, based on the structural and gasification differences between the volatiles and semi-coke produced by high-temperature pyrolysis of coal, a concept of enhanced high-temperature gasification in a fluidized bed by combining direct injection gasification with swirl gasification was proposed. The Y-type fluidized bed high-temperature zone gasification process for coal powder, along with the corresponding equipment technology, was developed, thereby overcoming the common problem of high ash and slag ratios in fluidized bed gasification. Third is the technical approach for staged cooling and separation of syngas in fluidized bed reactors, which involves dry slag discharge, separation of ash and slag, and staged heat extraction. Through the combination of Y-type fluidized bed gasification, high-temperature quenching in a downward-flowing bed, and cooling and heat exchange in a fluidized bed, a complete set of clean and efficient gasification technologies for Y-type fluidized beds has been developed, addressing the common issues associated with fluidized bed gasification, such as high water consumption, difficulties in treating saline wastewater and black water, and challenges in utilizing the resulting ash and slag. 　　An industrial demonstration of this project was carried out at Jinan Huangtai Gas Stove Co., Ltd., where an industrial demonstration plant with a capacity of 60,000 tons per year has been built. Data from the device’s operation show that its slag reaction time has been increased by more than 20 times; the carbon conversion rate is at least 99%, water savings amount to at least 90%, and energy savings are at least 30%. The ratio of ash to slag has been reduced to 1:6, and the carbon content in the gasification slag is no more than 0.1%. Currently, the project team is working with Shandong Energy Group to upgrade and build a plant with an annual capacity of 300,000 tons, which is expected to provide a transformative syngas production technology for the coal chemical industry. 　　It is understood that gasification is the key technology for the clean and efficient utilization of coal. However, existing gasification technologies treat coal as a single substance; as a result, fluidized-bed gasification relies on highly demanding conditions to improve carbon conversion rates, while bubbling-bed gasification allows for lower-cost operation at the expense of reduced efficiency. Gas-flow bed gasification is the most widely used mainstream technology in the coal chemical industry at present, but it suffers from common problems such as a high ash-to-coal ratio, high water consumption, high energy consumption, and high pollution.