At present, fixed-bed gasification is the most widely used biomass thermochemical conversion technology in my country. However, the production scale is generally small and the efficient and continuous operation performance is poor, which cannot adapt to the large-scale utilization method represented by power generation. Therefore, in the field of biomass conversion and utilization, the development of large-scale, efficient and reliable gasification technology is a key technology that urgently needs to be overcome. In 2007, East China University of Science and Technology presided over the implementation of the World Bank's Global Environment Facility Project (CRESP)"Development of Large-scale Biomass Fixed Bed Gasifiers". Later, it was responsible for completing a number of relevant key scientific research. The core equipment technology passed the expert acceptance in July 2009. The technical principle of this project is to use biomass fuel to produce combustible gas through fixed bed auto-heating. The key technologies include temperature control in the gasifier to prevent slagging, reduce fly ash entrainment, and deep purification of fuel gas. The core equipment of this project-the fixed bed gasifier has a single furnace gas production of more than 5000m /h, and the calorific value of the gas using typical crop straw as raw material is more than 1500kcal/m. At the same time, by-products such as tar and plant ash can also be obtained. The gasification system operates efficiently, reliably and cleanly, and has fully met the requirements of large-scale industrial production. The results of this project can be widely used in gas supply, power generation and heat supply.

Application situation or application prospects: Using the results of this project, a 5MW straw gasification power generation demonstration project has been built in Yangzhou City, Jiangsu Province, and all operating indicators have met the design requirements. This gasifier is suitable for supporting the construction of a biomass gas production plant with a scale of about 5,000 - 15,000 m /h, or matching an installed power generation capacity of 2 - 6MW, and the annual consumption of straw raw materials is 20,000 - 50,000 tons. The technology of this project is suitable for areas rich in biomass resources such as crop straw and agricultural and forestry processing residues, and has good market prospects.