The amount of solid biomass available in China is huge, mainly based on agricultural waste and wood waste. Biomass distribution is scattered, and collection and transportation are difficult. Under the current conditions in China, it is difficult to adopt large-scale combustion technology, so small and medium-sized biomass gasification power generation technology (200-5000kW) has unique advantages in China. Due to the tight supply of electricity in China, and the waste of biomass is large and the price is low, the cost of biomass gasification power generation is about 0.2-0.3 yuan/Kw.h, which is close to or better than conventional power generation. its unit investment is 3500-4000 yuan/Kw, about 60% -70% of coal-fired power, so it has the conditions to enter the market competition.
Biomass gasification refers to the thermochemical process of converting biomass fuels into flammable gases. In this process, water vapor, free oxygen or combined oxygen is thermochemically reacted with carbon in the fuel to form a combustible gas. The biomass gasification process is complicated, and the gasification reaction conditions are also different. However, all the gasification reaction processes basically include the drying, pyrolysis, oxidation and reduction processes of biomass.