Gasification reactor adaptable for feedstock with wide particle size distribution

A gasification reactor adaptable for feedstock with wide particle size distribution, comprising:

• a reactor body comprising a first reaction chamber, a second reaction chamber, and a third reaction chamber, which are connected with each other, wherein:
• a top of the first reaction chamber is provided with a feed inlet and a gas outlet;
• both the second reaction chamber and the third reaction chamber are located below the first reaction chamber, and the third reaction chamber is sleeved on an outer periphery of the second reaction chamber;
• a side wall of the first reaction chamber is provided with a first vent, and the first vent is configured for introducing a first gasification agent;
• a bottom of the second reaction chamber is provided with a second vent, and the second vent is configured for introducing an oxidant;
• and
• a bottom of the third reaction chamber is provided with a third vent, and the third vent is configured for introducing a second gasification agent,
• wherein a gas collecting device is provided in the first reaction chamber, the gas collecting device comprises a gas collecting hood with a bottom opening and a gas duct, the gas collecting hood is close to the top of the first reaction chamber, one end of the gas duct is connected to the top of the gas collecting hood, and the other end of the gas duct, far from the gas collecting hood, is connected to the gas outlet,
• wherein angle-adjustable louvers are provided at the bottom opening of the gas collecting hood, and
• wherein an inclined annular distributor is provided in the first reaction chamber near the bottom thereof, and the annular distributor divides an interior of the first reaction chamber into a first annular gas chamber so that the first gasification agent introduced from the first vent enters the first annular gas chamber, and then is evenly spread into the first reaction chamber through holes on the annular distributor.