05-09-2013 дата публикации
Номер: US20130230433A1
A tar destruction unit for a biomass gasifier is described, comprising a catalyst and/or heating means situated within the free-board section of the gasifier. Also described is a biomass gasifier having such a tar destruction unit. 1. A free-board tar destruction unit for a gasifier , comprising:(a) means for affixing to the inside of a free-board section of a gasifier, or in the case of a dual bed gasifier to the inside of either the gasifier vessel or the combustor vessel ;(b) a catalyst.2. The free-board tar destruction unit of claim 1 , further comprising heating means.3. A free-board tar destruction unit for a gasifier claim 1 , comprising:(a) means for affixing to the inside of a free-board section of a gasifier;(b) heating means.4. The free-board tar destruction unit of claim 3 , further comprising a catalyst.5. The free-board tar destruction unit of wherein the catalyst is within a radial flow catalyst bed.6. The free-board tar destruction unit of wherein the catalyst is within a single compartment claim 1 , axial flow catalyst bed.7. The free-board tar destruction unit of wherein the catalyst is within a plurality of flow-through horizontal catalyst compartments.8. The free-board tar destruction unit of wherein the catalyst is within a plurality of bayonet vertical catalyst compartments.9. The free-board tar destruction unit of wherein the catalyst and heating means are within a plurality of alternating bayonet vertical compartments.10. The free-board tar destruction unit of wherein the catalyst is a naphtha stream reforming catalyst claim 4 , preferably RK-212.11. The free-board tar destruction unit of wherein the catalyst is lime.12. A biomass gasifier comprising:(a) a particle bed section, having, within it, sand or other chemically inert particles;(b) a free-board section, devoid of the particle bed;(c) a biomass feeder, capable of feeding biomass into the particle bed section;(d) a steam feeder, capable of feeding steam into the particle bed section;(e ...
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