Heat recovery systems for biomass gasification systems

摘要

Biomass gasification systems including a reactor configured to gasify a dried biomass fuel in the presence of air to generate producer gas are provided. The biomass gasification systems also may include a heat exchanger adapted to transfer heat from the producer gas to a biomass feedstock to produce the dried biomass fuel and cooled producer gas.

主权项

1. A biomass gasification system, comprising:
a reactor having an internal chamber, wherein the reactor is configured to gasify a biomass feedstock in the presence of aft to generate a producer gas; a first neat exchanger external from the reactor and separate from the internal chamber, wherein a flow path of air passes through the first heat exchanger and passes to the reactor, a flow path of the producer gas passes downstream from the reactor and through the first heat exchanger, and the first heat exchanger is configured to transfer heat from a first position along the flow path of the producer gas to the flow path of air; and a second heat exchanger external from the reactor and separate from the internal chamber, wherein the flow path of the producer gas passes downstream from the first heat exchanger and through the second heat exchanger, a flow path of the biomass feedstock passes through the second heat exchanger and passes to the reactor, and the second heat exchanger is configured to transfer heat from a second position along the flow path of the producer gas to the flow path of the biomass feedstock to dry the biomass feedstock and cool the producer gas, wherein the first position and the second position are located along the flow path of the producer gas downstream from the reactor and upstream from all of at least one scrubber or a filter unit.