METHOD FOR SUPPLYING AN ENTRAINED-FLOW GASIFICATION REACTOR WITH CARBONACEOUS FUELS

• US 20120137583A1
• Filed: 08/10/2010
• Published: 06/07/2012
• Est. Priority Date: 08/12/2009
• Status: Active Grant

• Current Assignee: Thyssenkrupp Uhde GmbH (Thyssenkrupp AG)
• Original Assignee: Thyssenkrupp Uhde GmbH (Thyssenkrupp AG)
• Inventors: Heinritz-Adrian, Max, Kowoll, Johannes, Hamel, Stefan
• Granted Patent: US 8,932,375 B2
• Time in Patent Office: Days
• US Class Current: 48/197.R
• CPC Class Codes: C10G 2/32 with the use of catalysts
• CPC Class Codes: C10G 2300/207 Acid gases, e.g. H2S, COS, SO2, HCN
• CPC Class Codes: C10G 2300/4081 Recycling aspects
• CPC Class Codes: C10G 2400/02 Gasoline
• CPC Class Codes: C10J 2200/15 Details of feeding means
• CPC Class Codes: C10J 2200/156 Sluices, e.g. mechanical sluices for preventing escape of gas through the feed inlet
• CPC Class Codes: C10J 2300/0933 Coal fines for producing water gas
• CPC Class Codes: C10J 2300/0936 Coal fines for producing producer gas
• CPC Class Codes: C10J 2300/1659 to liquid hydrocarbons Fischer-Tropsch process C10G2/00
• CPC Class Codes: C10J 2300/1665 to alcohols, e.g. methanol or ethanol preparation of alcohols in general C07C29/00
• CPC Class Codes: C10J 2300/1807 Recycle loops, e.g. gas, solids, heating medium, water
• CPC Class Codes: C10J 2300/1815 for carbon dioxide
• CPC Class Codes: C10J 3/466 Entrained flow processes
• CPC Class Codes: C10J 3/506 for entrained flow gasifiers
• CPC Class Codes: C10K 1/004 Sulfur containing contaminants, e.g. hydrogen sulfide
• CPC Class Codes: C10K 1/005 Carbon dioxide
• CPC Class Codes: C10K 3/04 reducing the carbon monoxide content , e.g. water-gas shift [WGS]
• CPC Class Codes: Y02P 30/20 using bio-feedstock

Abstract

With a method for supplying an entrained-flow gasification reactor with carbonaceous fuel for the production of a gas that contains CO and H₂ and flue ash under pressure and at a temperature above the melting point of the ash, wherein the resulting gas is passed to further treatment stages, particularly at least one synthesis stage, the yield of the liquid products is supposed to be increased in cost-advantageous and simple manner.

This is achieved in that the waste gas that is derived from the subsequent treatment stage and still contains hydrocarbons and/or hydrogen is used for pneumatic conveying of the fuel into the entrained-flow gasification reactor.

Claims

1-5. -5. (canceled)

6. Method for supplying an entrained-flow gasification reactor with carbonaceous fuel for the production of a gas that contains CO and H₂ and flue ash under pressure and at a temperature above the melting point of the ash, wherein the resulting gas is passed to further treatment stages, particularly at least one synthesis stage, and the waste gas that is derived from the subsequent treatment stage and still contains hydrocarbons and/or hydrogen is used for pneumatic conveying of the fuel into the entrained-flow gasification reactor, wherein the further treatment stages are formed by a CO conversion stage, a gas purification stage, and a first synthesis stage, for example for methanol synthesis, and a second synthesis stage, for example an MTG (methanol to gasoline) stage, wherein the recirculated gases contain at least 1 vol.-% of the hydrocarbons and/or 1 vol.-% of the hydrogen, and wherein the gases recirculated from the subsequent systems are mixed with CO₂ before being compressed.

7. Method according to claim 6, wherein a gas obtained during the gas treatment, which contains predominantly CO₂ and at least 10 ppm H₂S and/or CO, is mixed into the recirculated gas that contains hydrocarbon and/or hydrogen.

8. Method according to claim 6, wherein the recirculated gas is used at least in part for conveying the fuel in a feed container, for building up pressure in the feed container and/or for fluidization of the fuel in the feed container.