The world’s first multi-nozzle opposed semi-waste-boiler gasifier achieved successful one-time feeding
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On December 10, the world’s first multi-nozzle opposed semi-waste-boiler gasifier for the polymethoxymethane project at Yulin Energy Chemical Co., Ltd. of Shandong Energy Group, which was overall contracted by Sinochem Tianchen Company and constructed by Sinochem No. 2 Company, successfully underwent its first feed operation, marking the official entry of the project into the load-testing phase. This project is currently the largest dimethyl polyoxymethane facility under construction in China, with an annual production capacity of 500,000 tons of coal-based dimethyl polyoxymethane, along with a supporting coal-based methanol production facility capable of producing 900,000 tons per year. The project mainly consists of units such as slurry feeding, gasification equipment, slag treatment systems, synthesis shift reactors, and low-temperature methanol washing units. The industrial products produced, including polymethoxymethane and methanol, are widely used in various fields.
This type of furnace shouldn’t accumulate much scale, right?
The multi-nozzle opposed semi-waste boiler (waste boiler-chilling) gasification technology was developed under the leadership of Professor Yu Guangsuo from East China University of Science and Technology; it has received continuous support and funding from programs such as the \"863\" Program, the National Natural Science Foundation projects, and the Shanghai Pujiang Talent Program. Since taking on the sub-project of the **11th Five-Year Plan 863 Program, titled “Research on 2000t coal/day multi-nozzle opposed water-coal slurry gasifier for 200MW-class IGCC power generation”, in 2006, the research team proposed a gasification island design for 200MW-class IGCC power generation (including a radiant waste boiler). They conducted systematic laboratory tests and numerical simulations on the cold/hot models of the radiant waste boiler, and carried out in-depth studies on the multiphase flow, heat transfer processes, and slag behavior within the 2000-ton coal/day multi-nozzle opposed water-coal slurry gasifier and its radiant waste boiler. A series of academic papers were published, and related patents were applied for, providing theoretical and technical support for the selection of key equipment for the planned demonstration project.
After 15 years of research and development, the multi-nozzle opposed semi-waste-boiler gasification technology has moved beyond the laboratory stage and been put into industrial use. Currently, this industrial gasification unit is operating stably, with parameters such as the gasification process metrics, effective gas output, and amount of by-product steam all meeting the design values. This provides a solid foundation for the unit to operate for extended periods right from its first commissioning. By maintaining the original advantages such as a high carbon conversion rate and low raw material consumption, this technology enables most of the sensible heat in the high-temperature syngas to be recovered through a radiant boiler built into the gasifier, generating ~100 tons of high-pressure steam at 9.8 MPa per hour. This further improves the energy efficiency of coal gasification units, representing yet another significant innovation in modern advanced coal gasification technologies. The successful commissioning of this demonstration unit not only further strengthened the industry-leading position of the multi-nozzle opposed water-coal slurry gasification technology, but also greatly promoted the development of coal gasification technology and the level of related equipment in China.
The multi-nozzle opposed water-coal slurry gasification technology has become a new hallmark for Huali’s modern coal chemical technologies both in China and abroad. Since the operation of the first 1,000-ton-class industrial demonstration unit, it has been possible to achieve daily processing capacities of 1,000 tons, 2,000 tons, 3,000 tons, and even 4,000 tons per furnace. A range of technologies has been developed, including fully quenched and semi-waste-boiler types operating at pressures of 4.0 MPa and 6.5 MPa. This has enabled Huali to maintain its leading position internationally in the field of fluidized-bed water-coal slurry gasification technology. It has provided technical support for the construction of large-scale coal-based energy and chemical complexes, and has played a significant role in advancing China’s technological capabilities in areas such as coal chemistry and coal-based integrated production.
At 8:18 on May 31st, at the command of Gao Chunlei, the manager of the methanol plant at Yulin Energy and Chemical Co., Ltd., affiliated with Yankuang Group, the world’s first multi-nozzle opposed semi-waste-boiler gasifier was lifted into place at this facility. With the cooperation of various companies such as China Tianchen Engineering Corporation, Dongfang Electric Group’s Dongfang Boiler Co., Ltd., Xi’an Nuclear Equipment Company, and Shaanxi Chemical Construction Engineering Company, the gasifier was successfully lifted in one go, marking Yankuang Group’s leadership in coal gasification technology across the country.
The multi-nozzle opposed semi-waste-boiler gasifier is the core equipment for gasification in modern coal chemical industries. It was developed jointly by Yankuang Group and East China University of Science and Technology, and features high carbon conversion rates, high overall thermal efficiency, and high system efficiency. High-temperature syngas has most of its sensible heat recovered through radiation, generating 100 tons of high-pressure steam at 9.8 Mpa per hour; this reduces the investment required for boiler construction and is in line with **energy conservation and emission reduction policies. This gasification furnace is 45.75 meters long, has an inner diameter of 4.2 meters, and weighs 737 tons. It is capable of processing 2,000 tons of coal per day. High precision is required for its lifting operation; the furnace’s height is 110 meters, and the lifting equipment used is a 3,200-ton class crawler crane. This makes it the most challenging lifting task in the second phase of the Yankuang Yulin Energy Chemicals project.