Energy Conservation and Environmental Protection

Low-tar Biomass Staged Gasification System

Low-tar biomass staged gasification technology takes the tar problem, which is considered as the “Achilles’ heel” of the current industry, as the breakthrough point. The complexity of biomass gasification is divided into pyrolysis, oxidation and reduction processes by employing twin-bed system; Fluidized combustion in throat region could strengthen the oxidation reaction, thus the pyrolysis and oxidation kinetic reaction rates could be balanced to achieve in-situ removal of tar in gasifier. The char bed is designed to further lower the tar amount by reduction and reforming. The resulting tar content of raw fuel-gas could be reduced to as low as 50mg/Nm3.

Industry status
Technical advantages

The Biomass gasification department focuses on the development of high-value transformation technology for solid waste. Agricultural and forestry waste and MSW are used in high-value-added downstream applications, such as clean electricity generation, heat supply, fuel gas supply, soil amelioration and fine chemical production, through thermochemical conversion technologies like gasification and pyrolysis. These technologies can provide green, carbon neutral energy and environmental solution while minimizing the waste quantity. More than 30 patents have been granted on this technology, and the department has been involved in the development of the national standard for the engineering design specifications for biomass pyrolysis polygeneration of char, gas and oil.

1. Two-stage system of pyrolysis + gasification, High gasification efficiency, >75%; Low tar content,<50mg/Nm3.

① Efficient heat transfer technology.

② Fluidized combustion technology, oxidation temperature exceeds 950oC, tar removal efficiency exceeds 99%.

③ In-situ heterogeneous catalytic reforming technology, tar removal efficiency exceeds 90%.

2. Biomass feedstock flexibility.

3. Capacity flexibility，hundred kilowatts to megawatts.

4. Abundant production (char, gas and oil) and wide downstream applications.

5. Skid-mounted design, short manufacturing duration.

Shanghai Electric Group Co., Ltd. Central Academe