Entrained-flow gasification of biomass as slurry

• US 20110041405A1
• Filed: 09/24/2008
• Published: 02/24/2011
• Est. Priority Date: 10/24/2007
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Metz, Thomas, Hannemann, Frank
• Application Number:
  US12/739,242
• Publication Number:
  US 20110041405A1
• Time in Patent Office: Days
• US Class Current: 48/209
• CPC Class Codes: C10J 2200/09 Mechanical details of gasifiers not otherwise provided for, e.g. sealing means
• CPC Class Codes: C10J 2200/152 Nozzles or lances for introducing gas, liquids or suspensions
• CPC Class Codes: C10J 2300/0903 Feed preparation
• CPC Class Codes: C10J 2300/0916 Biomass
• CPC Class Codes: C10J 2300/0959 Oxygen
• CPC Class Codes: C10J 2300/0973 Water
• CPC Class Codes: C10J 2300/0989 Hydrocarbons as additives to gasifying agents to improve caloric properties
• CPC Class Codes: C10J 2300/16 Integration of gasification processes with another plant or parts within the plant
• CPC Class Codes: C10J 2300/1807 Recycle loops, e.g. gas, solids, heating medium, water
• CPC Class Codes: C10J 3/485 Entrained flow gasifiers
• CPC Class Codes: C10J 3/506 for entrained flow gasifiers
• CPC Class Codes: C10L 9/083 Torrefaction
• CPC Class Codes: Y02E 50/10 Biofuels, e.g. bio-diesel
• CPC Class Codes: Y02E 50/30 Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

A method for entrained bed gasification of biomass is provided, wherein pure biomass is first torrefied then milled and the torrefied and milled biomass is introduced to the gasification process with a fluid as a slurry. An energetically favorable process is described using the combination of torrefaction, milling and mixing with a liquid, preferably residual products from a subsequent synthesis process, but also other available suitable materials.

Claims

1-7. -7. (canceled)

8. A method for entrained-flow gasification of a biomass, comprising:

torrefying the biomass; and

milling the biomass,

wherein the torrefied and milled biomass is fed together with a liquid as slurry to the gasification process.

9. The method for entrained-flow gasification as claimed in claim 8, wherein a fraction of a recycled synthetic product generated in the gasification process is used as the liquid.

10. The method for entrained-flow gasification as claimed in claim 8, wherein a recycled residual product generated in a synthesis process following the gasification process is used as the liquid.

11. The method for entrained-flow gasification as claimed in claim 9, wherein the recycled synthetic product generated in the gasification process or the recycled residual product is used as one portion of the liquid, and a liquid medium supplied from outside as a remaining portion of the liquid.

12. The method for entrained-flow gasification as claimed in claim 11, wherein the residual product and the liquid medium are different.

13. The method for entrained-flow gasification as claimed in claim 12, wherein the residual product is dimethyl ether and the liquid medium is glycerin.

14. The method for entrained-flow gasification as claimed in claim 8, wherein water, oils, paraffin, glycerin, methanol or liquid CO2 is used as the liquid.

15. The method for entrained-flow gasification as claimed in claim 8, wherein wood, bark, straw, miscanthus or another renewable raw material is used as the biomass.

16. The method for entrained-flow gasification as claimed in claim 8, wherein an arbitrary mixture of wood, bark, straw, miscanthus and other renewable raw materials is used as the biomass.