# US 2015/0147233 A1 · Exhaust gas purifying apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0147233 A1 - Document ID: US20150147233A1 - Status: Published application - Kind: A1 - Application number: 14/591,462 - Filed: 2015-01-07 - Published: 2015-05-28 - Earliest claimed: 2012-12-19 - Assignees: Fuji Electric Co., Ltd. - Applicants: Fuji Electric Co., Ltd. - Inventors: Hiroyuki TOYAMA; Eiju NAKADA; Takashi INUI - Web page: https://patentgrep.com/patent/US20150147233A1 ## CPC - B01D 53/78: with gas-liquid contact - B01D 53/346: {Controlling the process} - B01D 53/502: {characterised by a specific solution or suspension} - B01D 53/504: {characterised by a specific device} - B01D 53/56: Nitrogen oxides (B01D53/60 takes precedence) - B01D 53/60: Simultaneously removing sulfur oxides and nitrogen oxides - B01D 53/92: of engine exhaust gases (exhaust {or silencing} apparatus {for internal combustion engines, machines or engines in general}, having means for purifying, {rendering innocuous} or otherwise treating exhaust gases F01N3/00) - B01D 2251/402: of magnesium - B01D 2252/1035: Sea water - B01D 2257/302: Sulfur oxides - B01D 2257/404: Nitrogen oxides other than dinitrogen oxide - B01D 2258/012: Diesel engines and lean burn gasoline engines - B01D 2259/4566: for use in transportation means - C02F 1/46109: {Electrodes} - C02F 1/4618: {for producing "ionised" acidic or basic water} - C02F 2001/46133: {characterised by the material} - C02F 2001/46152: {characterised by the shape or form} - C02F 2001/4619: {only cathodic or alkaline water, e.g. for reducing} - 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) - C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes) ## Abstract Provided is an exhaust gas purifying apparatus capable of purifying exhaust gas by using water. The exhaust gas purifying apparatus includes an electrolyzed alkaline water generator which includes a cathode and an anode formed of Mg or an Mg alloy, and in which water is electrolyzed through application of voltage across the cathode and anode, to generate electrolyzed alkaline water. The purifying apparatus includes an exhaust gas absorption tower into which exhaust gas is introduced. Spray nozzles spray the electrolyzed alkaline water in the exhaust gas absorption tower. ## Claims ### Claim 1 An exhaust gas purifying apparatus, comprising: an electrolyzed alkaline water generator which includes a cathode and an anode, the anode being formed of Mg or an Mg alloy, the electrolyzed alkaline water generator electrolyzing water therein through application of a voltage across the cathode and the anode so as to generate electrolyzed alkaline water; an exhaust gas absorption tower, exhaust gas being introduced into the exhaust gas absorption tower; an electrolyzed alkaline water supply line through which the electrolyzed alkaline water is communicated; and a spray nozzle connected with the electrolyzed alkaline water supply line to receive the electrolyzed alkaline water and being provided inside the exhaust gas absorption tower, the exhaust gas purifying apparatus being configured to spray the electrolyzed alkaline water through the spray nozzle to purify the exhaust gas through gas-liquid contact between the sprayed electrolyzed alkaline water and the exhaust gas introduced into the exhaust gas absorption tower. ### Claim 2 (depends on 1) The exhaust gas purifying apparatus according to claim 1, wherein the exhaust gas absorption tower includes a scrubber wastewater storage section that recovers the electrolyzed alkaline water sprayed from the spray nozzle, and wherein the exhaust gas purifying apparatus further comprises a scrubber wastewater return line through which scrubber wastewater from the scrubber wastewater storage section is communicated to the electrolyzed alkaline water generator. ### Claim 3 (depends on 2) The exhaust gas purifying apparatus according to claim 2, further comprising an air diffuser device provided in the scrubber wastewater storage section. ### Claim 4 (depends on 1) The exhaust gas purifying apparatus according to claim 1, further comprising: a water quality analyzer that analyzes alkalinity of the electrolyzed alkaline water generated by the electrolyzed alkaline water generator; and an alkalinity adjustment device that adjusts the alkalinity of the electrolyzed alkaline water in such a manner that the alkalinity becomes equal to or higher than a predetermined value. ### Claim 5 (depends on 1) The exhaust gas purifying apparatus according to claim 1, wherein the electrolyzed alkaline water generator includes an electrolysis tank made up of a water-insoluble and conductive material, and the anode is disposed inside the electrolysis tank, the exhaust gas purifying apparatus being configured to apply a positive voltage to the anode and apply a negative voltage to the electrolysis tank, to thereby electrolyze the water inside the electrolysis tank. ### Claim 6 (depends on 5) The exhaust gas purifying apparatus according to claim 5, wherein the electrolysis tank is the cathode. ### Claim 7 (depends on 1) The exhaust gas purifying apparatus according to claim 1, wherein the electrolyzed alkaline water generator includes a duct which is made up of a water-insoluble and conductive material and through which water, which is to be electrolyzed, flows, the anode is disposed inside the duct, and the exhaust gas purifying apparatus being configured to apply a positive voltage to the anode and apply a negative voltage to the duct, to thereby electrolyze the water to be electrolyzed that flows through the duct to generate the electrolyzed alkaline water. ### Claim 8 (depends on 7) The exhaust gas purifying apparatus according to claim 7, wherein the duct is a pipe. ### Claim 9 (depends on 7) The exhaust gas purifying apparatus according to claim 7, wherein the duct operates as the cathode. ### Claim 10 An exhaust gas purifying apparatus, comprising: an electrolyzed alkaline water generator including a cathode, a main anode formed of Mg or an Mg alloy, a first voltage applicator applying a voltage across the cathode and the main anode to electrolyze water in the electrolyzed alkaline water generator to generate electrolyzed alkaline water, an auxiliary anode made up of a water-insoluble and conductive material, a coupling circuit connecting the auxiliary anode to both the cathode and the main anode, and a second voltage applicator applying a voltage to the auxiliary anode; an exhaust gas absorption tower, exhaust gas being introduced into the exhaust gas absorption tower; an electrolyzed alkaline water supply line through which the electrolyzed alkaline water is communicated; and a spray nozzle connected with the electrolyzed alkaline water supply line to receive the electrolyzed alkaline water and being provided inside the exhaust gas absorption tower, the exhaust gas purifying apparatus being configured to spray the electrolyzed alkaline water through the spray nozzle to purify the exhaust gas through gas-liquid contact between the sprayed electrolyzed alkaline water and the exhaust gas introduced into the exhaust gas absorption tower. ### Claim 11 (depends on 10) The exhaust gas purifying apparatus according to claim 10, wherein the coupling circuit includes a diode. ### Claim 12 (depends on 10) The exhaust gas purifying apparatus according to claim 10, wherein the coupling circuit includes a transistor. ### Claim 13 (depends on 10) The exhaust gas purifying apparatus according to claim 10, wherein the main anode has a plurality of anodes and the cathode has a plurality of cathodes connected to the anodes, the coupling circuit includes coupled elements that are provided in a number proportional to a number of the anodes and the cathodes, and the auxiliary anode includes a plurality of auxiliary anodes connected to each of the coupled elements. ### Claim 14 (depends on 10) The exhaust gas purifying apparatus according to claim 10, wherein the second voltage applicator applies the voltage to the auxiliary anode so as to provide electrons from the auxiliary anode to the cathode, thereby controlling a total number of ions formed by the cathode. ### Claim 15 An exhaust gas purifying apparatus, comprising: an electrolyzed alkaline water generator which includes a cathode and an anode, the anode being formed of one selected from the group consisting of Mg and an Mg alloy, the electrolyzed alkaline water generator electrolyzing water through a voltage across the cathode and the anode, so as to generate electrolyzed alkaline water; an exhaust gas absorption tower containing exhaust gas; and a spray nozzle connected with the electrolyzed alkaline water generator to receive the electrolyzed alkaline water therefrom and being provided inside the exhaust gas absorption tower, the spray nozzle spraying the electrolyzed alkaline water to purify the exhaust gas. ### Claim 16 (depends on 15) The exhaust gas purifying apparatus according to claim 15, further comprising an auxiliary anode, made up of a water-insoluble and conductive material, connected to both the cathode and the anode. ### Claim 17 (depends on 16) The exhaust gas purifying apparatus according to claim 16, further comprising a second voltage applicator applying a voltage to the auxiliary anode so as to provide electrons from the auxiliary anode to the cathode, thereby controlling a total number of ions formed by the cathode.