# US 2014/0151603 A1 · Integrated drying gasification > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151603 A1 - Document ID: US20140151603A1 - Status: Published application - Kind: A1 - Application number: 14/117,211 - Filed: 2012-05-09 - Published: 2014-06-05 - Earliest claimed: 2011-05-09 - Assignees: Hrl Treasury (Idgcc) Pty Ltd - Inventors: Bernard Anderson; Alex Blatchford; Tom Stephanou - Web page: https://patentgrep.com/patent/US20140151603A1 ## CPC - C01B 3/02: Production of hydrogen; Production of gaseous mixtures containing hydrogen - B01J 6/008: {Pyrolysis reactions (of hydrocarbons C10G9/00)} - C10J 3/482: {Gasifiers with stationary fluidised bed} - C10J 3/503: {for gasifiers with stationary fluidised bed} - C10J 3/56: Apparatus; Plants - C10K 1/024: {by filtration} - C10J 2200/152: Nozzles or lances for introducing gas, liquids or suspensions - C10J 2200/156: Sluices, e.g. mechanical sluices for preventing escape of gas through the feed inlet - C10J 2300/0909: Drying - C10J 2300/0916: Biomass - C10J 2300/093: Coal - C10J 2300/0959: Oxygen - C10J 2300/0969: Carbon dioxide - C10J 2300/0976: as steam - C10J 2300/1815: for carbon dioxide - C10J 2300/1823: for synthesis gas - C10K 1/003: {of acid contaminants, e.g. acid gas removal} - C10K 1/101: {with water only} - C10K 1/121: {containing NH3 only (possibly in combination with NH4 salts)} - C10K 3/04: reducing the carbon monoxide content {, e.g. water-gas shift [WGS]} - Y02E 20/18: Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS] - Y02P 20/145: the feedstock being materials of biological origin - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C10J: PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES (synthesis gas from liquid or gaseous hydrocarbons C01B; underground gasification of minerals E21B43/295); CARBURETTING AIR OR OTHER GASES - C10K: PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract An integrated drying gasification system comprises a gasifier for gasifying carbonaceous fuel to produce hot product gas and an entrained flow dryer which receives the hot product gas to dry the carbonaceous fuel prior to gasification. At least one inlet to the gasifier communicates one or more additional gases from the system, such as recycled syngas, steam and/or recycled carbon dioxide, to the gasifier to generate an increased hot product gas mass flow rate from the gasifier. The system may comprise a plurality of lock hopper systems coupled to the entrained flow dryer. At least one intermediate storage vessel may be provided in one or more feed legs to the gasifier maintain a constant supply of carbonaceous fuel to the gasifier for a temporary period independently of carbonaceous fuel supplied to the entrained flow dryer. ## Claims ### Claim 1 An integrated drying gasification system comprising: a gasifier for gasifying carbonaceous fuel to produce hot product gas; an entrained flow dryer which receives the hot product gas to dry the carbonaceous fuel prior to gasification; and at least one inlet to the gasifier to communicate syngas and/or carbon dioxide recycled from the system to the gasifier to generate an increased hot product gas mass flow rate from the gasifier. ### Claim 2 (depends on 1) The system of claim 1, wherein the syngas is recycled downstream of a syngas cooler of the system to reduce the temperature of the recycled syngas. ### Claim 3 (depends on 1) The system of claim 1, wherein the syngas is recycled downstream of an ammonia scrubber of the system. ### Claim 4 (depends on 1) The system of claim 1, wherein the syngas is recycled downstream of one or more of the following of the system: a main filter; a water gas shift vessel; an acid gas removal system; a membrane separation system; a pressure swing adsorption system; other syngas processing equipment. ### Claim 5 (depends on 1) The system of claim 1, wherein the system comprises a compressor to increase the pressure of the one or more recycled gases prior to communicating the recycled gases to the gasifier. ### Claim 6 (depends on 1) The system of claim 1, wherein the gasifier is a fluid bed gasifier and the one or more recycled gases are supplied to a fluid bed and/or a freeboard region of the gasifier. ### Claim 7 (depends on 1) The system of claim 1, wherein the one or more recycled gases are supplied to the gasifier via a plurality of nozzles at a variety of levels of the gasifier. ### Claim 8 (depends on 1) The system of claim 1, wherein each recycled gas is supplied to the gasifier via respective separate nozzles for each gas. ### Claim 9 (depends on 8) The system of claim 8, wherein the separate nozzles are also separate from nozzles that supply oxygen to the gasifier. ### Claim 10 (depends on 1) The system of claim 1, wherein steam and/or recycled carbon dioxide is mixed with oxygen prior to supply to the gasifier. ### Claim 11 A method of improving the performance of an integrated drying gasification system, the method including adding syngas and/or carbon dioxide recycled from the system to a gasifier of the system to generate an increased hot product gas mass flow rate from the gasifier. ### Claim 12 (depends on 11) The method of claim 11 including increasing the pressure of the one or more recycled gases prior to communicating the one or more recycled gases to the gasifier. ### Claim 13 An improved integrated drying gasification system comprising: a gasifier for gasifying carbonaceous fuel to produce hot product gas; a single entrained flow dryer which receives the hot product gas to dry the carbonaceous fuel prior to gasification; and a plurality of lock hopper systems coupled to the single entrained flow dryer to supply pressurized, pre-dried carbonaceous fuel to the single entrained flow dryer, wherein each lock hopper system comprises a plurality of lock hoppers. ### Claim 14 (depends on 13) The system of claim 13, further comprising a respective feed point to the entrained flow dryer for each lock hopper system. ### Claim 15 (depends on 14) The system of claim 14, wherein the respective feed points are provided around a circumference of the entrained flow dryer. ### Claim 16 (depends on 14) The system of claim 14, wherein the respective feed points are provided at the same level, or at different levels, of the entrained flow dryer. ### Claim 17 An improved integrated drying gasification system comprising: a gasifier for gasifying carbonaceous fuel to produce hot product gas; a feed leg coupled to the gasifier to supply carbonaceous fuel to the gasifier; and at least one intermediate storage vessel provided in the feed leg to maintain a constant supply of carbonaceous fuel to the gasifier for a period of between about 10 minutes and about 60 minutes independently of carbonaceous fuel supplied to an entrained flow dryer of the system. ### Claim 18 (depends on 17) The system of claim 17, wherein the intermediate storage vessel is provided in each feed leg coupled to the gasifier. ### Claim 19 (depends on 17) The system of claim 17, wherein each feed leg comprises a screw feeder to provide flow control. ### Claim 20 (depends on 1) The system of claim 1, comprising a plurality of feed legs coupled to the gasifier for delivering carbonaceous fuel to the gasifier. ### Claim 21 (depends on 20) The system of claim 20, comprising three feed legs arranged around the circumference of the gasifier. ### Claim 22 (depends on 20) The system of claim 20, wherein the feed legs are arranged at regular intervals around the circumference of the gasifier. ### Claim 23 (depends on 20) The system of claim 20, wherein the feed legs are arranged at intervals of 90 degrees around part of the circumference of the gasifier. ### Claim 24 (depends on 20) The system of claim 20, wherein the feed legs are coupled to the gasifier at the same level, or at different levels. ### Claim 25 (depends on 1) The system of any one of claim 1, wherein the gasifier is an entrained flow gasifier and water is sprayed into the gasifier or at the outlet of the gasifier.