The feeding test of China's first pilot-scale biomass pressurized gasification device with air flow bed was successfully completed
On June 4th, the 40t/d biomass air flow bed pressurized gasification key technology pilot plant, jointly built by Dongfang Electric (Chengdu) Innovation Research Co., LTD. (referred to as: Dongcheng Research Institute) and Jiangxi Changyu Industrial Co., LTD. (referred to as: Jiangxi Changyu Company), successfully completed the feedstock operation test in one go! This marks a key breakthrough in China's one-step pulverization (non-baking pulverization) and steam pure oxygen pressurized gasification technology routes for biomass raw materials (such as straw, wood, and garden waste) with independent intellectual property rights.
According to Zheng Xio, the chief commander of the pilot project, this technology uses efficient powder-making and pressurized dense-phase pneumatic conveying to send virgin biomass powder into the pressurized gasifier, where it undergoes core processes such as high-temperature cracking and partial oxidation. Efficiently converting biomass powder into high-quality syngas and glassy ash - this serves as a clean and high-quality raw gas source for the production of green chemicals such as "green hydrogen, ammonia, and alcohol" and "sustainable aviation kerosene". Compared with traditional fixed bed and fluidized bed technologies, gas flow bed technology has significant advantages such as higher gasification efficiency, faster reaction speed, more compact equipment, and purer gas production (no tar/methane).
According to Xu Yinglu, the chief engineer of the gasification department at Dongcheng Research Institute, to ensure the reliability and advancement of the pilot plant technology, the project team conducted thorough preliminary verification work relying on the two key research and development platforms of Dongcheng Research Institute.
The first is the hot state test bench for the common key technology research and development of air flow beds: The test pressure of this test bench is 1 to 4MPa, and the test temperature is 1200 to 1600℃. It is the domestic common technology research and development test platform for fluidized bed gasification with the highest operating pressure, the most complete process flow, the most comprehensive control and detection means, and the most comprehensive functions at the same level. By simulating the high-temperature and high-pressure reaction environment under actual working conditions, In-depth research on the gasification reaction characteristics, product distribution patterns and the optimal control of key operating parameters (temperature, pressure, oxygen-fuel ratio) of different types of biomass raw materials has provided core data support for the design and operation of industrial facilities.
The second is the research and development test bench for powder pressurized dense-phase pneumatic conveying technology: The conveying capacity of this test bench is The daily capacity is 10 to 220 tons, and the conveying pressure (sending pressure) is 0.3 to 5.35MPa. It is equipped with conveying pipelines of various diameters, covering all research directions in the field of powder/particulate matter pressurized pneumatic conveying. In view of the characteristics of biomass raw materials such as low density, poor fluidity and easy bridging, through simulation experiments, The structure of the conveying system, the selection of key equipment and the control strategy have been optimized to ensure the stability and reliability of raw material supply for the pilot plant, providing a key guarantee for industrial scale-up.
Zheng Xiou said that the successful feeding test of this pilot project verified the feasibility of key technologies such as high-efficiency powder making and pressurized dense-phase pneumatic conveying of compressible powder, as well as the rationality of the design of the entire process flow, the selection of operation process parameters, the setting of operation control logic, and the design of key equipment such as gasification burners and gasifiers. It has laid a solid foundation for the subsequent tests of gasification performance of other materials, the design, construction and operation of industrial demonstration facilities.
During the operation of the device, the effective gas composition (CO+H2) is as high as 71%, and the carbon conversion rate is over 99%. Based on the preliminary economic calculation of the 100,000-ton/year green methanol production plan based on the pilot-scale technical parameters, under reasonable biomass raw material prices, green product premiums and possible carbon revenue scenarios, the static payback period of the project is expected to be 3.6 years (including a construction period of 1.2 years), demonstrating good commercial potential.