Method for supplying an entrained-flow gasification reactor with carbonaceous fuels

• US 8,932,375 B2
• Filed: 08/10/2010
• Issued: 01/13/2015
• Est. Priority Date: 08/12/2009
• Status: Expired due to Fees

• Current Assignee: Thyssenkrupp Uhde GmbH (Thyssenkrupp AG)
• Original Assignee: Thyssenkrupp Uhde GmbH (Thyssenkrupp AG)
• Inventors: Heinritz-Adrian, Max, Kowoll, Johannes, Hamel, Stefan
• Primary Examiner(s): Akram, Imran
• Application Number:
  US13/389,870
• Publication Number:
  US 20120137583A1
• Time in Patent Office: 1,617 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 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. A method for supplying an entrained-flow gasification reactor with carbonaceous fuel for producing a gas that contains CO, H₂, and flue ash under pressure and at a temperature above the melting point of the ash, the method comprising steps of:

providing an entrained-flow gasification reactor;

supplying the entrained-flow gasification reactor with carbonaceous fuel;

producing via the entrained-flow gasification reactor and the carbonaceous fuel in the entrained-flow gasification reactor the gas that contains CO, H₂, and flue ash;

subjecting the gas to a plurality of treatment stages to form a waste gas;

mixing the waste gas with CO₂ to form a mixed gas;

compressing the mixed gas to form a recirculation gas; and

conveying the carbonaceous fuel pneumatically into the entrained-flow gasification reactor using the recirculation gas;

wherein said plurality of treatment stages comprises at least one synthesis stage, a CO conversion stage, a gas purification stage, a first synthesis stage, and a second synthesis stage; and

wherein the recirculation gas contains at least 1 vol.-% of hydrocarbons and/or 1 vol.-% of hydrogen.

2. The method according to claim 1, wherein a further gas obtained during the plurality of treatment stages contains predominantly CO₂ and at least 10 ppm H₂S and/or CO and is mixed into the recirculation gas.

3. The method according to claim 1, wherein the recirculation gas is used at least in part for conveying the carbonaceous fuel in a feed container, for building up pressure in the feed container and/or for fluidization of the carbonaceous fuel in the feed container.