PRESSURIZED FLUIDIZED BED REACTOR

The pressurized fluidized bed reactor is suitable for gasification, combustion or other high-temperature thermal processes. The system can be fluidized with superheated steam or air, with co-feed of oxygen or carbon dioxide. Up to four electrically-heated tube banks of 20 heaters each can be installed to provide up to 32 kW of heating. This is a bubbling flluidized bed system with a disengagement zone and internal cyclone. Product gas is fed to a high pressure, high temperature candle filter for separation of particulate such as char and elutriated bed bed material.

Specifications

  • Max. temperature: 2200°F (1200°C)
  • Fluidizing gas: steam or air with possible co-feed of O2, or CO2
  • Fluidizing gas preheater:  35 kW, max 1100°F (600°C)
  • Design:  Steel pressure vessel lined with two layers of castable refractory
  • Overall dimensions: Ø 30 in (0.76 m) x 7.0 m (23.0 ft) tall
  • Reactor inner dimensions: Ø 10 in (0.26 m) expanding to 14 in (0.36 m) x 17 ft (5.2 m) tall
  • Pressurized feed system including lock hopper, metering screws and high-speed, water cooled screw

Capabilities

  • Pressurized fluidized bed gasification of biomass, waste, black liquor
  • Pressurized oxy-fuel combustion
  • Evaluation of system performance and heat balance

Research

  • Measurement  of system performance (syngas, fuel conversion, temperatures, circulation rates)
  • Evaluation of bed materials for gasification, tar cracking (performance, attrition)
  • Comparative studies of feedstocks and feedstock blends
  • Acquisition of data for system scale-up
  • Simulation model validation