Inner Mongolia Rongxin project’s world’s largest gasifier achieved successful first-time feeding

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Successful first feeding of the world’s largest gasifier in the Inner Mongolia Rongxin project Author/Source: Coal Chemical Engineering 114 Forum Date: 2019-10-30 Clicks: 6 At 15:50 on October 29, 2019, the world’s largest gasifier in the Inner Mongolia Rongxin project was successfully fed for the first time. This gasifier utilizes the multi-nozzle opposed water-coal slurry pressurized gasification technology, which was developed through collaboration between Yankuang Group and East China University of Science and Technology and for which independent intellectual property rights exist. Three gasifiers with a diameter of 4000 mm are used; each one weighs 405 tons and is 26 meters long. Two of them are in operation while one serves as a backup. Each gasifier can process 4000 tons of coal per day (at nominal capacity), making them the largest 4000-ton-class water-coal slurry gasifiers in the world. They are primarily used to produce CO and H₂ required for the manufacture of ethylene glycol, as well as syngas needed for methanol production. Ethylene glycol is synthesized via an indirect method, and DMMn is synthesized indirectly from methanol. The coal grinders used in conjunction with the gasification furnace are four overflow-type ball mills, with drum specifications of φ5.2*8.5m. The main motors are asynchronous motors, with a rated voltage of 10,000V and a rated power of 3,800kW. Each mill can hold 252 tons of steel balls, making them the largest ball mills in use in the coal chemical industry to date. The high-pressure coal slurry pump utilizes six GEHO double-cylinder, double-acting diaphragm pumps, with a coal slurry processing capacity of 137 m3/h; it represents the largest model of high-pressure coal slurry pump available in the current coal chemical industry. The subsequent coal cinder treatment equipment is also at the forefront in the coal chemical industry. The entire series of projects undertaken by Inner Mongolia Rongxin has given rise to numerous globally leading processes and equipment. Coal grinder, high-pressure coal slurry pump. Since the start of construction of the Inner Mongolia Rongxin project on November 15, 2017, all members of the project team worked together diligently to ensure strict control over safety and quality standards. Overcoming various challenges such as a tight schedule, heavy workload, and two winters, they fought against sandstorms and extreme cold, working overtime to achieve the goal of completing the project and putting it into operation within 23 months – setting a new record for the construction of similar chemical facilities. The successful feeding of materials into the gasification furnace represents another major milestone achieved by Hualu Company, following the oxygen production via air separation on October 24. All members of the Inner Mongolia Rongxin project team will build on their successes and keep working hard to achieve the goal of completing the entire process for the Rongxin Chemicals Phase II project and producing the final product. The total estimated investment for this project is 7.68 billion yuan, with a land area of 1,268 mu. Construction officially commenced in November 2017 under the EPC general contracting model. The 400,000-ton coal-to-ethylene glycol and 300,000-ton polyoxymethylenemethane circular economy demonstration project of Yanzhou Coal Industry Ordos Energy Chemical Rongxin Chemical Co., Ltd. builds upon the company’s first-phase 900,000-ton coal-to-methanol project by carrying out further expansion through second and third phases, thereby extending the coal chemical industry chain. This effort aims to achieve an annual production capacity of 5 million tons of coal-to-methanol as well as to create a demonstration base for a range of downstream fine chemical products, thus establishing a new benchmark for coal conversion and industrial upgrading. This project utilizes multi-nozzle gasification technology to produce CO and H2 required for ethylene glycol production, as well as syngas needed for methanol synthesis; ethylene glycol is synthesized via an indirect method, while DMMn is synthesized indirectly from methanol. The main construction components of the project include 3 coal gasification units with a capacity of 4,000 t/d each, utilizing the multi-nozzle coal slurry gasification technology developed in collaboration between Yankuang and East China University of Science and Technology; the coal feeding volume per unit is the highest among gasification units worldwide. The project also includes purification systems (CO conversion, low-temperature methanol washing, deep cryogenic CO separation, and PSA hydrogen production), sulfur recovery facilities, a methanol production plant with an annual capacity of 900,000 tons, an ethylene glycol production plant with an annual capacity of 400,000 tons, a DMMn production plant with an annual capacity of 300,000 tons, 2 air separation units with a capacity of 92,000 Nm3/h each (the largest of their kind currently), 2 high-pressure circulating fluidized bed boilers with a capacity of 380 t/h each, along with 2 steam turbine generators rated at 20 MW each, as well as various auxiliary and supporting process equipment.