# US 8,771,550 B2 · Partial oxidation feed system and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,550 B2 - Document ID: US8771550B2 - Status: Granted - Kind: B2 - Application number: 13/512,018 - Filed: 2012-04-23 - Published: 2013-10-24 - Granted: 2014-07-08 - Earliest claimed: 2012-04-23 - Assignees: General Electric Company - Applicants: Raymond Douglas Steele; Thomas Frederick Leininger; Shiguang Li - Inventors: Raymond Douglas Steele; Thomas Frederick Leininger; Shiguang Li - Web page: https://patentgrep.com/patent/US8771550B2 ## CPC - C01B 3/32: by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide or air - B01J 19/00: Chemical, physical or physico-chemical processes in general; Their relevant apparatus - B01J 19/0006: {Controlling or regulating processes (controlling or regulating in general G05)} - C10J 3/485: {Entrained flow gasifiers} - C01B 2203/025: containing a partial oxidation step - C01B 2203/0877: by direct injection of fluid - C10J 2300/0903: Feed preparation - C10J 2300/0959: Oxygen - C10J 2300/0973: Water - C10J 2300/0983: Additives - C10J 2300/0993: Inert particles, e.g. as heat exchange medium in a fluidized or moving bed, heat carriers, sand - C10J 2300/0996: Calcium-containing inorganic materials, e.g. lime - Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] - Y02E 20/18: Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS] - 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 - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A system includes a slag additive slurry feed system configured to combine a slurrying agent, a mineral slag additive, and a liquid slurrying medium to generate a stabilized mineral slurry. The slurrying agent is configured to increase a viscosity of the stabilized mineral slurry. The system also includes a partial oxidation system configured to receive the stabilized mineral slurry, a feedstock, and oxygen into a gasifier reaction chamber. The partial oxidation system is configured to partially oxidize the feedstock to produce a gaseous product and a solid product. ## Claims ### Claim 1 A system, comprising: a slag additive slurry feed system configured to combine a slurrying agent, a mineral slag additive, and a liquid slurrying medium to generate a stabilized mineral slurry, wherein the slurrying agent is configured to increase a viscosity of the stabilized mineral slurry, the slag additive slurry feed system comprises a slurry tank having the stabilized mineral slurry, and the slurrying agent comprises at least one of carboxymethyl cellulose, sucrose, long-chain polymers, soluble polymers, or polymers capable of colloidal suspension, or a combination thereof; and a partial oxidation system configured to receive the stabilized mineral slurry, a feedstock, and oxygen into a gasifier reaction chamber, wherein the partial oxidation system is configured to partially oxidize the feedstock to produce a gaseous product and a solid product. ### Claim 2 (depends on 1) The system of claim 1, wherein the slurrying agent is configured to decrease a settling rate of solids within the stabilized mineral slurry, wherein the solids comprise minerals. ### Claim 3 (depends on 2) The system of claim 2, wherein the settling rate of the stabilized mineral slurry is between approximately 5×10−5 to 1×10−4 cm/s. ### Claim 4 (depends on 1) The system of claim 1, wherein the slurrying agent comprises an organic compound configured to partially oxidize in the gasifier reaction chamber. ### Claim 5 (depends on 1) The system of claim 1, wherein the stabilized mineral slurry is configured to increase a viscosity of a molten slag inside the gasifier reaction chamber. ### Claim 6 (depends on 1) The system of claim 1, wherein the slurrying agent comprises the carboxymethyl cellulose. ### Claim 7 (depends on 1) The system of claim 1, wherein the mineral slag additive comprises at least one of silicon dioxide, calcium carbonate, iron oxide, or aluminum oxide, or a combination thereof. ### Claim 8 (depends on 1) The system of claim 1, wherein a concentration of the slurrying agent in the stabilized mineral slurry is between approximately 0.25 to 2 weight percent, calculated based on the dry weight of the mineral slag additive. ### Claim 9 (depends on 1) The system of claim 1, wherein the partial oxidation system is configured to receive a water moderator into a gasifier reaction chamber. ### Claim 10 (depends on 1) The system of claim 1, wherein the slag additive slurry feed system comprises: a slurry agitator configured to mix the slurrying agent, the mineral slag additive, and the liquid slurrying medium together to generate the stabilized mineral slurry; a slurry pump configured to mix the stabilized slurry and to transfer the stabilized mineral slurry from the slurry tank to the partial oxidation system; and a slurry valve configured to adjust a flow rate of the stabilized mineral slurry. ### Claim 11 (depends on 1) The system of claim 1, wherein a concentration of the mineral slag additive within the stabilized mineral slurry is between approximately 60 to 63 weight percent. ### Claim 12 (depends on 1) The system of claim 1, wherein the viscosity of the stabilized mineral slurry is less than 1000 centipoise. ### Claim 13 (depends on 1) They system of claim 1, wherein a particle size distribution of the mineral slag additive is such that 100% of particles of the mineral slag additive pass through a 270 mesh screen (53 microns) and 95% of the particles of the mineral slag additive pass through a 400 mesh screen (37 microns). ### Claim 14 A system, comprising: a slag additive slurry feed system configured to combine a slurrying agent, a mineral slag additive, and a liquid slurrying medium to generate a stabilized mineral slurry, wherein the slurrying agent is configured to increase a slurry viscosity of the stabilized mineral slurry; a gasifier configured to receive the stabilized mineral slurry, a feedstock, and oxygen into a gasification chamber, wherein the gasifier is configured to gasify the feedstock to produce a syngas and a slag; a sensor configured to provide a signal related to a slag viscosity of the slag; and a slag additive slurry feed control system configured to receive the signal and input indicative of a target slag characteristic, wherein the slag additive slurry feed control system is configured to control the slag additive slurry feed system to adjust relative proportions of the slurrying agent, the mineral slag additive, and the liquid slurrying medium comprising the stabilized mineral slurry based on the signal and the target slag characteristic. ### Claim 15 (depends on 14) The system of claim 14, wherein the slag additive slurry feed system comprises a slurry tank having the stabilized mineral slurry, and the slurrying agent comprises at least one of carboxymethyl cellulose, sucrose, wood pulp, paper pulp, cellulosic materials, long-chain polymers, soluble polymers, or polymers capable of colloidal suspension, or a combination thereof. ### Claim 16 (depends on 14) The system of claim 14, wherein the sensor comprises a differential pressure sensor comprising a high pressure leg coupled to a gasifier pressure sensor and a low pressure leg coupled to a quench chamber pressure sensor or a syngas exit line pressure sensor, wherein the gasifier pressure sensor is coupled to the gasifier and configured to indicate a gasifier pressure, the quench chamber pressure sensor is coupled to a quench chamber of the gasifier and configured to indicate a quench chamber pressure, the syngas exit line pressure sensor is coupled to a syngas exit line of the gasifier and configured to indicate a syngas exit line pressure, and the differential pressure sensor is configured to provide the signal indicative of a differential pressure between the high and low pressure legs. ### Claim 17 (depends on 14) The system of claim 14, wherein the sensor comprises an optical sensor configured to provide the signal indicative of a slag plugging condition of a throat of the gasifier, a slag erosion condition of the throat, or any combination thereof. ### Claim 18 (depends on 14) The system of claim 14, wherein the slag additive slurry feed control system is configured to receive a target signal indicative of a target slag viscosity, and is configured to adjust a flow rate of the stabilized mineral slurry to the gasifier based on the signal and the target signal. ### Claim 19 A method, comprising: combining a slurrying agent and a liquid slurrying medium to generate a mixture in a slurry tank of a slag additive slurry feed system, wherein the slurrying agent comprises at least one of carboxymethyl cellulose, sucrose, long-chain polymers, soluble polymers, or polymers capable of colloidal suspension, or a combination thereof; combining the mixture and a mineral slag additive to generate a stabilized mineral slurry using the slag additive slurry feed system, wherein the slurrying agent is configured to increase a viscosity of the stabilized mineral slurry; receiving the stabilized mineral slurry, a feedstock, and oxygen into a partial oxidation system; and partially oxidizing the feedstock to produce a gaseous product and a solid product. ### Claim 20 (depends on 19) The method of claim 19, wherein the partial oxidation system comprises a gasifier, the gaseous product comprises a syngas, and the solid product comprises a slag. ### Claim 21 (depends on 19) The method of claim 19, comprising partially oxidizing the slurrying agent in a gasifier reaction chamber of the partial oxidation system.