# US 11,439,942 B2 · Gas purification apparatus, ship including the same, and gas purification method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,439,942 B2 - Document ID: US11439942B2 - Status: Granted - Kind: B2 - Application number: 17/273,472 - Filed: 2019-09-05 - Published: 2021-08-12 - Granted: 2022-09-13 - Earliest claimed: 2018-10-24 - Assignees: Mitsubishi Heavy Industries Engineering, Ltd. - Applicants: Mitsubishi Heavy Industries Engineering, Ltd. - Inventors: Masayuki Inui; Makoto Susaki; Akihito Otani - Web page: https://patentgrep.com/patent/US11439942B2 ## CPC - B01D 46/2403: {characterised by the physical shape or structure of the filtering element} - B01D 46/0036: {by adsorption or absorption} - B01D 46/66: Regeneration of the filtering material or filter elements inside the filter (B01D46/04, B01D46/48 take precedence) - B01D 53/508: {by treating the gases with solids} - B01D 53/62: Carbon oxides - B01D 53/83: with moving reactants - B01D 53/8631: {Processes characterised by a specific device} - B01D 53/9431: {Processes characterised by a specific device} - B01J 35/58: Fabrics or filaments - B63H 21/32: Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels - F01N 3/021: by means of filters - F01N 3/035: with catalytic reactors - F01N 3/04: using liquids - F01N 13/00: Exhaust or silencing apparatus characterised by constructional features - B01D 2251/304: of sodium - B01D 2251/404: of calcium - B01D 2251/604: Hydroxides - B01D 2251/606: Carbonates - B01D 2253/102: Carbon - B01D 2253/112: Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106 - B01D 2255/9155: Wall flow filters - B01D 2257/302: Sulfur oxides - B01D 2257/404: Nitrogen oxides other than dinitrogen oxide - B01D 2257/504: Carbon dioxide - B01D 2258/01: Engine exhaust gases - B01D 2259/4566: for use in transportation means - B01D 2279/30: for treatment of exhaust gases from IC Engines - B01D 2279/40: for cleaning of environmental air, e.g. by filters installed on vehicles or on streets - F01N 2250/02: filtering and catalytic conversion - F01N 2330/00: Structure of catalyst support or particle filter - F01N 2570/04: Sulfur or sulfur oxides - F01N 2570/14: Nitrogen oxides - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - B63H: MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V1/14; specially adapted for submarines, other than nuclear propulsion, B63G; specially adapted for torpedoes F42B19/00) - F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16) ## Abstract A gas purification apparatus includes: a housing to which a gas is introduced; a filter portion for removing an impure substance in the gas from the gas, the filter portion being disposed inside the housing; and a gas purification agent for removing a removal target substance in the gas from the gas, the gas purification agent being disposed, inside the housing, on the filter portion or in a space at a downstream side of the filter portion with respect to a flow of the gas. ## Claims ### Claim 1 A gas purification apparatus, comprising: a housing to which a gas is introduced; a filter portion that removes an impure substance from the gas, the filter portion being disposed inside the housing; and a gas purification agent that removes a removal target substance in the gas from the gas, the gas purification agent being disposed inside the housing on the filter portion or in a space at a downstream side of the filter portion with respect to a flow of the gas, wherein the filter portion includes a filter element having a hollow portion, the filter element being disposed to protrude from the space at the downstream side toward a space at an upstream side of the filter portion with respect to the flow of the gas, the gas purification agent is disposed at least in the filter element or in the hollow portion of the filter element, the filter portion further includes a support portion for supporting the filter element, the filter element protrudes downward from the support portion, and the support portion stores a backup gas purification agent above the gas purification agent. ### Claim 2 (depends on 1) The gas purification apparatus according to claim 1, wherein the filter element includes a tubular filter element. ### Claim 3 (depends on 1) The gas purification apparatus according to claim 1, further comprising a filter cleaning portion that blows a fluid toward the filter element, or a pre-coating portion covering the filter element. ### Claim 4 (depends on 3) The gas purification apparatus according to claim 3, wherein the gas purification apparatus comprises the filter cleaning portion, and the filter cleaning portion includes a gas injection portion disposed outside the gas purification agent inside the hollow portion. ### Claim 5 (depends on 1) The gas purification apparatus according to claim 1, further comprising a downstream separation device for removing the gas purification agent accompanying the flow of the gas discharged outside the housing from the space at the downstream side, the downstream separation device being disposed at a downstream side of the filter portion with respect to the flow of the gas. ### Claim 6 (depends on 1) The gas purification apparatus according to claim 1, wherein the gas purification agent contains calcium hydroxide. ### Claim 7 (depends on 1) The gas purification apparatus according to claim 1, further comprising a denitration catalyst supported by a filter element of the filter portion. ### Claim 8 A gas purification apparatus, comprising: a housing to which a gas is introduced; a filter portion that removes an impure substance from the gas, the filter portion being disposed inside the housing; and a gas purification agent that removes a removal target substance in the gas from the gas, the gas purification agent being disposed inside the housing on the filter portion or in a space at a downstream side of the filter portion with respect to a flow of the gas, wherein the filter portion includes a filter element having a hollow portion, the filter element being disposed to protrude from the space at the downstream side toward a space at an upstream side of the filter portion with respect to the flow of the gas, the gas purification agent is disposed at least in the filter element or in the hollow portion of the filter element, and the gas purification apparatus further comprises a discharge port that discharges the gas purification agent from the hollow portion of the filter element, the discharge port being disposed on the filter element. ### Claim 9 (depends on 8) The gas purification apparatus according to claim 8, further comprising an opening-and-closing portion that opens and closes the discharge port. ### Claim 10 (depends on 8) The gas purification apparatus according to claim 8, further comprising a discharge chamber through which the gas purification agent is to be discharged from the hollow portion, wherein the discharge chamber and the space at the upstream side are separated. ### Claim 11 A ship, comprising: an engine; and a gas purification apparatus, wherein the gas purification apparatus comprises: a housing to which a gas is introduced; a filter portion that removes an impure substance from the gas, the filter portion being disposed inside the housing; and a gas purification agent that removes a removal target substance in the gas from the gas, the gas purification agent being disposed, inside the housing, on the filter portion or in a space at a downstream side of the filter portion with respect to a flow of the gas, and the gas purification apparatus is configured such that exhaust gas from the engine is introduced into the housing of the gas purification apparatus as the gas. ### Claim 12 (depends on 1) A method of purifying a gas by using the gas purification apparatus according to claim 1, comprising: introducing a gas into the housing; removing impure substances in the gas from the gas with the filter portion disposed inside the housing; and removing a removal target substance in the gas from the gas with the gas purification agent disposed, inside the housing, on the filter portion or in a space at a downstream side of the filter portion with respect to a flow of the gas. ### Claim 13 (depends on 12) The method of purifying a gas according to claim 12, further comprising: removing the gas purification agent accompanying the flow of the gas discharged outside the housing from the space at the downstream side, with a downstream separation device disposed at a downstream side of the filter portion with respect to the flow of the gas.