Osaka, Japan

The Kansai Electric Power Co., Inc. , also known as Kanden , is an electric utility with its operational area of Kansai region, Japan .The Kansai region is Japan’s second-largest industrial area, and in normal times, its most nuclear-reliant. Before the Fukushima nuclear disaster, a band of 11 nuclear reactors — north of the major cities Osaka and Kyoto — supplied almost 50 percent of the region’s power.As of January 2012, only one of those reactors was still running. In March 2012, the last reactor was taken off the powergrid. Wikipedia.


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Patent
Mitsubishi Group and Kansai Electric Power Co. | Date: 2016-07-20

An absorbent regenerator 15 is divided into at least two parts and includes: a rich solution supply line L_(1) through which a rich solution 14 is supplied to the absorbent regenerator 15 from a CO_(2) absorber 13; a lean solution supply line L_(2) through which a lean solution 16 is supplied to the CO_(2) absorber 13 from the absorbent regenerator 15; a lean-rich solution heat exchanger 17 that is provided at an intersection of the lean solution supply line L_(2) and the rich solution supply line L_(1) to exchange heat between the lean solution 16 and the rich solution 14; a branch portion 18 that branches some 14a of the rich solution 14 at a downstream side of the lean-rich solution heat exchanger 17 on the rich solution supply line L_(1); and a first mixing portion 20a that mixes the some 14a of the rich solution 14 branched at the branch portion 18 with a semi-lean solution 19 in which CO_(2) has been partially removed from the rich solution 14 in the absorbent regenerator 15.


Patent
Mitsubishi Group and Kansai Electric Power Co. | Date: 2016-06-22

A composite amine absorbent is an absorbent dissolved in water for absorbing CO_(2) or H_(2)S in gas, or both of them, which comprises:1) at least one amine compound, and2) a disulfide compound as an oxidative degradation inhibitor for the absorbent,wherein the disulfide compound is a compound represented by the following Chemical Formula (I).R^(1)-S_(-)S-R^(2) (I)in the formula, R^(1) or R^(2) is any one of an alkyl group with 1 to 4 carbon atoms, a hydroxyethyl group, a carboxyethyl group, a cyclohexyl group, and a dibutylthiocarbamoyl group.


Patent
Mitsubishi Group and Kansai Electric Power Co. | Date: 2014-08-27

A first amine, which is a straight chain secondary monoamine, 2) a second amine, which is a cyclic secondary polyamine as a reaction accelerator, and 3) a third amine, which is an amine consisting of one selected from a cyclic amine group constituted from a secondary or tertiary amino group or a straight chain amine group with high steric hindrance are mixed to obtain an absorbent. By the synergistic effect thereof, absorption properties to CO_(2) and/or H_(2)S are excellent and the absorbed CO_(2) or H_(2)S emission properties during the regeneration of the absorbent become excellent. Therefore, the water vapor amount used during the regeneration of the absorbent in CO_(2) recovery equipment can be reduced.


Patent
Mitsubishi Group and Kansai Electric Power Co. | Date: 2016-06-01

A CO_(2 )recovery unit includes an absorber that reduces CO_(2 )in flue gas (101) discharged from a combustion facility (50) by absorbing CO_(2 )by an absorbent, a regenerator that heats the absorbent having absorbed CO_(2 )to emit CO_(2), and regenerates and supplies the absorbent to the absorber, and a regenerating heater that uses steam (106) supplied from the combustion facility (50) for heating the absorbent in the regenerator and returns heated condensed water (106a) to the combustion facility (50). The CO_(2 )recovery unit further includes a condensed water/flue gas heat exchanger (57) that heats the condensed water (106a) to be returned from the regenerating heater to the combustion facility (50) by heat-exchanging the condensed water (106a) with the flue gas (101) in a flue gas duct (51) in the combustion facility (50).


Patent
Mitsubishi Group and Kansai Electric Power Co. | Date: 2015-03-18

An absorbent is prepared by dissolving in water 1) monoethanolamine (MEA) and 2) a primary amine represented by the following formula (1) and having high steric hindrance. Releasability of CO_(2) or H_(2)S during regeneration of the absorbent is thereby improved, and the amount of water vapor used during regeneration of the absorbent in a facility for recovering CO_(2) or H_(2)S can be reduced._(1) to R_(3): H or a hydrocarbon group having 1 to 3 carbon atoms, at least one of R_(1) to R_(3) being a hydrocarbon.


Patent
Mitsubishi Group and Kansai Electric Power Co. | Date: 2015-07-15

A CO_(2) recovery unit (10A; 10B; 10C) for recovery and removal of CO_(2) in a CO_(2)-containing flue gas 11A that contains CO_(2) using a CO_(2)-absorbent 12 within a CO_(2) absorber 13 is provided. The CO_(2) absorber 13 includes a CO_(2)-absorbing unit 13A for the absorption of CO_(2) in a CO_(2)-containing flue gas, a main water rinsing unit 13C that is provided on a gas flow downstream side of the CO_(2)-absorbing unit 13A and that uses rinsing water 20 to recover the accompanying CO_(2)-absorbent while cooling decarbonated flue gas, and a preliminary water rinsing unit 13B provided between the CO_(2)-absorbing unit 13A and the main water rinsing unit 13C. A portion 20a of the rinsing water 20 containing the CO_(2)-absorbent that is circulated in the main water rinsing unit 13C is withdrawn and is subjected to preliminary water rinsing in the preliminary water rinsing unit 13B. The preliminary rinsing water is allowed to meet with a CO_(2)-absorbent 12 while allowing the rinsing water to directly flow down on the CO_(2)-absorbing unit 13A side.


Patent
Kansai Electric Power Co. | Date: 2014-11-05

This invention provides a CO_(2) desorption catalyst that has an excellent CO_(2) desorption activity and that can be used to replace metal filler. This invention provides a CO_(2) desorption catalyst comprising an inorganic powder or inorganic powder compact, the inorganic powder or inorganic powder compact having a BET specific surface area of 7 m^(2)/g or more.


Patent
Kansai Electric Power Co. | Date: 2016-04-27

An object of the present invention is to provide a CO_(2) recovery apparatus capable of recovering CO_(2) by using only a low-quality exhaust heat at 100C or less. The present invention comprises an absorption tower for allowing a basic aqueous solution to absorb CO_(2); and a regenerator for heating a basic aqueous solution with CO_(2) absorbed therein using a heating medium having a temperature of 100C or less, thereby desorbing CO_(2).


Patent
Hitachi Ltd. and Kansai Electric Power Co. | Date: 2014-08-06

A power state of any point of a power system is estimated with high accuracy to appropriately perform monitoring of the state of the entire power system. A power system state estimation device is provided which includes a power system data database which holds node information indicative of positions in the power system and facility information including sensors in association with each other, a sensor data database which holds the output of the sensors, an estimation environment setting unit which determines a sensor to be used when a power state at a particular node is estimated, using the information of the power system data database, and a state estimation unit which in correspondence to the sensor used at the particular node determined by the estimation environment setting unit, obtains the output of the sensor from the sensor data database and performs state estimation for the entire power system.


Patent
Kansai Electric Power Co. | Date: 2014-03-19

A CO_(2 )recovery apparatus capable of recovering CO_(2 )by using only a low-quality exhaust heat at 100 C. or less is provided. The present invention includes an absorption tower for allowing a basic aqueous solution to absorb CO_(2); and a regenerator for heating a basic aqueous solution with CO_(2 )absorbed therein using a heating medium having a temperature of 100 C. or less, thereby desorbing CO_(2).

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