Mitsubishi Heavy Industries Limited

Mitsubishi Jukogyo Kabushiki Kaisha

The Kansai Electric Power Co., Inc.

The Tokyo Electric Power Company, Incorporated

Mitsubishi Heavy Industries Engineering, Ltd.

Central Research Institute of Electric Power Industry

Chubu Electric Power Company, Inc.

The Chugoku Electric Power Co., Inc.

Tohoku Electric Power Company, Inc.

Kyushu Electric Power Co., Inc.

Hokkaido Electric Power Company, Inc.

Shikoku Electric Power Co., Inc.

Hokuriku Electric Power Company

Clean Coal Power R&d Co., Ltd.

Ryoen Technical Service Corp.

Makoto Susaki

Kazuo Ishida

Shintaro Honjo

Atsushi Tatani

Masahiro Harada

Susumu Okino

Hajime Nagano

Kazuaki Kimura

Kenji Inoue

Toshikuni Sera

Taku Shimizu

Haruaki Hirayama

Masakazu Sakaguchi

Fumiaki Sato

Yoshinori Koyama

Kozo Iida

Masahiro Hirano

Masanao Yonemura

Akihito Otani

Kaori Yoshida

Toshinobu Yasutake

Masayuki Inui

Katsuhiko Yokohama

Setsuo Omoto

Masaru Chiyomaru

Hiroshi Suzumura

Shuji Fujii

Koji Higashino

Masanori Tabata

Shuji Kameyama

Mitsugi Suehiro

Shintarou Honjo

Yukiko Shirakusa

Kazuhide Kamimura

Tetsuya Ito

Hiroyuki Nakamura

Masaki Nakahara

Akira Kisei

Akira Johana

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.

Gas purification apparatus, ship including the same, and gas purification method

Provided are a catalyst for hydrolysis and use of a titanium dioxide-based composition which are capable of removing COS and HCN simultaneously at high degradation percentages. The catalyst for hydrolysis is a catalyst for hydrolysis of carbonyl sulfide and hydrogen cyanide, having at least: an active component containing, as a main component, at least one metal selected from the group consisting of barium, nickel, ruthenium, cobalt, and molybdenum; and a titanium dioxide-based support supporting the active component.

Catalyst for hydrolysis of carbonyl sulfide and hydrogen cyanide and use of titanium dioxide-based composition

A direct reduced iron manufacturing system includes a gas reformer for supplying steam to reform natural gas, a gas heater being a heating unit for heating a reformed gas reformed by the gas reformer to a predetermined temperature, a direct reduction furnace for reducing iron ore directly into reduced iron using a high-temperature reducing gas, an acid gas removal unit having an acid gas component absorber and a regenerator for releasing the acid gas, and a recovery gas introduction line for supplying a recovery gas released from the regenerator to each of a reforming furnace of the gas reformer and a furnace of the gas heater.

Direct reduced iron manufacturing system

Included are: a direct reduction furnace for reducing iron ore directly into reduced iron using a high-temperature reducing gas including hydrogen and carbon monoxide, an acid gas removal unit having an acid gas component absorber for removing, with an absorbent such as an amine-based solvent, acid gas components (CO, HS) in a reduction furnace flue gas discharged from the direct reduction furnace, and a regenerator for releasing the acid gas, and a degradation product removal unit for separating and removing a degradation product in the absorbent used by circulating through the absorber and the regenerator.

A coal reforming system includes a drying furnace for drying low-grade coal, a carbonizing furnace for carbonizing the dried low-grade coal, hot air generating furnaces for supplying hot air to the drying furnace or the carbonizing furnace, and a carbonizing gas circulation line for supplying a carbonizing gas, which is generated in the carbonizing furnace, as a fuel for the hot air generating furnaces while the temperature thereof is maintained.

Coal reforming system

A wastewater treatment apparatus () that treats the wastewater containing persistent substances, according to the present invention, includes a wastewater treatment bath () for treating a wastewater (), an oxidizing reagent adding unit () for adding an oxidizing reagent () in the wastewater treatment bath (), and an alkaline reagent adding unit () for adding an alkaline reagent () in the wastewater treatment bath (). By making the wastewater in the wastewater treatment bath () in the alkaline condition, it is possible to completely decompose the persistent substances in the wastewater by the oxidation treatment using an oxidizing reagent.

Wastewater treatment apparatus

The present invention provides a mercury removal system and method for effectively removing a mercury component, which is present in a gas stream in an extremely small amount in wet gas cleaning. The mercury removal system in wet gas cleaning includes a water washing tower for introducing therein a target gas containing a mercury component and transferring the mercury component into an absorbing solution, a flash drum () for flashing the absorbing solution discharged from the water washing tower to separate the absorbing solution into a gas component and waste water, an oxidation treatment means () for adding an oxidizing agent to the absorbing solution at the preceding stage of the flash drum, and a waste water treatment means for subjecting to coagulation sedimentation treatment the separated waste water containing the mercury component at the following stage of the flash drum to dispose of the mercury component as sludge.

Mercury removal system and method

A COS treatment apparatus for a gasified gas includes an Oremoval catalyst and a COS conversion catalyst located on the downstream side of a gasified gas flow with respect to the Oremoval catalyst. Also, a COS treatment apparatus includes a TiOcatalyst that carries CrOor NiO. Further, a COS treatment method includes a first step in which Ois removed by the reaction with HS and CO, and a second step in which COS is converted to HS.

Apparatus for treating COS for gas produced by gasification and method for treating COS

A wet gas purification method is provided for removing ammonia from a heavy oil gasification gas, such as coal. The method principally involves a washing step during which absorbent is charged into the gas to absorb ammonia and an ammonia treating step wherein absorbent discharged from the washing step is separated into an effluent and an off-gas containing ammonia. The amount of absorbent charged during the washing step is controlled such that the ammonia concentration of gas exiting the washing step is 10 ppm or less.

Wet gas purification method and system for practicing the same

A gas combustion treatment method for the combustion treatment of an ammonia-containing gas and a hydrogen sulfide-containing gas, the method comprising a first combustion treatment step in which the ammonia-containing gas, together with a fuel, is introduced and burned; a nitrogen oxide reduction step downstream of the first combustion treatment step, in which a portion of the hydrogen sulfide-containing gas or the ammonia-containing gas is introduced and the nitrogen oxides produced in the first combustion treatment step are reduced in a reducing atmosphere; and a second combustion treatment step downstream of the nitrogen oxide reduction step, in which the remaining hydrogen sulfide-containing gas, together with air, is introduced and burned. The present invention provides a combustion apparatus suitable for use as a combustion furnace for off-gases resulting from the wet purification of coal gasification gas.

Gas combustion treatment method and apparatus therefor

A gas refining method for adsorbing a reducing gas obtained by pressure gasification of coal or oil comprises introducing a reducing gas stream into an adsorbing and removing zone where it contacts an adsorbent. Sulfur-containing compounds are adsorbed onto the adsorbent and a first oxygen-containing gas stream is introduced into the adsorbing and removing zone in order to form a regeneration gas containing sulfur dioxide. The regeneration gas is contacted with a second oxygen-containing stream and a calcium-containing liquid slurry to effect absorption of sulfur dioxide by the slurry and precipitation of a gypsum compound. The temperature of the slurry is varied to cause selective precipitation of 60 -gypsum hemihydrate or gypsum dihydrate.

Gas refining system

This invention relates to a gasification power generation process wherein a product gas A1 obtained by the gasification of coal or petroleum is used as the fuel of a gas turbine 4 for electric power generation, the process comprising the steps of dedusting product gas A1, introducing product gas A1 directly into gas turbine 4 as the fuel thereof to effect electric power generation, and subjecting the exhaust gas A2 discharged from gas turbine 4 to a gas purification treatment including at least desulfurization. This invention can provide a gasification power generation process which is more suitable for practical use from an economic point of view in that a high degree of exhaust gas purification and a marked improvement in thermal efficiency can be achieved and, moreover, the construction of the equipment for carrying out a gas purification treatment including desulfurization can be highly simplified.

Gasification power generation process and gasification power generation

This invention relates to a gas refining system wherein a high-temperature and high-pressure reducing gas is introduced into a fixed-bed desulfurizer packed with an adsorbent by which sulfur compounds contained in the high-temperature and high-pressure reducing gas are adsorbed and removed in the form of a sulfide, and the adsorbent having the sulfide adsorbed thereon is regenerated by roasting it with a regenerating gas containing oxygen, characterized in that the gas refining system is equipped with oxygen concentration control means for controlling the oxygen concentration in the regenerating gas introduced into the desulfurizer so as to keep the internal temperature of the desulfurizer during the regeneration reaction within the allowable temperature range of the adsorbent. This invention includes an embodiment in which the exhaust gas obtained after the regeneration reaction gas is brought into contact with a calcium compound-containing slurry to recover gypsum is recycled to the desulfurizer for use as the regenerating gas for the adsorbent. Thus, the adverse effect of the heat of regeneration reaction on the adsorbent used in the fixed-bed desulfurizer can be avoided positively and easily.

A gas refining system for adsorbing a reducing gas includes a reduced gas stream, a section for adsorbing and removing sulfur-containing compounds in the reducing gas, an adsorbent which contacts the reduced gas stream, an oxygen-gas containing stream which enters the adsorbing and removing section, a calcium-compound containing stream, and a reactor which receives the above streams and allows for the adsorption of sulfur dioxide and precipitation of a gypsum compound.

Growing community of inventors

Tokyo, Japan

Makoto Susaki