System and process for recycling fluidized boiler bed material
AssigneeImprobed AB
InventorsMikael Israelsson, Bengt-Ake Andersson, Lars Bierlein
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Abstract
The invention relates to a system for recycling fluidized bed boiler bed material, comprising: a. a bottom ash removal device for removing bed material from a fluidized bed boiler, b. a mechanical classifier (10) comprising a mesh size from 200 to 1,000 μm designed to separate a coarse and a fine particle size fraction, c. a magnetic separator (12) designed to magnetically classify the fine particle fraction from the mechanical classifier, d. a device for recirculating the magnetic particle fraction into the boiler. The invention allows effective recirculation and reuse of ilmenite bed material.
Claims21
A system for recycling fluidized bed boiler bed material, comprising:
- a) a bottom ash removal device for removing bed material from a fluidized bed boiler,
- b) a mechanical classifier (10) comprising a mesh size from 200 to 1,000 μm designed to separate a coarse and a fine particle size fraction,
- c) a magnetic separator (12) designed to magnetically classify the fine particle fraction from the mechanical classifier,
- d) a device for recirculating the magnetic particle fraction into the boiler.
A process for recycling fluidized bed boiler bed material comprising ilmenite, the process comprising the steps of:
- a) removing bed material from a fluidized bed boiler,
- b) mechanically classifying the bed material using a mesh size from 200 to 1,000 μm to separate a coarse and a fine particle size fraction,
- c) magnetically classifying the fine particle fraction from the mechanical classifier,
- d) recirculating the magnetic particle fraction into the boiler.
Dependencies are inferred from the claim text.