Mitsubishi Heavy Industries Limited

The Kansai Electric Power Co., Inc.

Mitsubishi Heavy Industries Engineering, Ltd.

Kabushiki Kaisha Meiji Gomu Kasei

Nippon Nyukazai Co., Ltd.

Ryuji Yoshiyama

Masayuki Eda

Masaki Iijima

Susumu Okino

Hideo Suzuki

Nobuyuki Ukai

Hideaki Sakurai

Hiroshi Nakashoji

Shigeru Yoshioka

Tsuyoshi Oishi

Yasuyuki Yagi

Tomio Mimura

Yukihiko Inoue

Masazumi Tanoura

Kouki Ogura

Yukio Tanaka

Tatsuya Tsujiuchi

Shuuji Fujii

Tomoh Akiyama

Noriko Watari

Mitsuru Sakano

Tarou Ichihara

Hiroshi Tanaka

Akihiro Kojima

Kenji Saito

Takuya Hirata

Hiromitsu Nagayasu

Yoshio Seiki

Kazuo Ishida

Ryosuke Araki

Haruaki Hirayama

Setsuo Omoto

Keiji Fujikawa

Shinya Tachibana

Toyoshi Nakagawa

Mikiya Sakurai

Yuichiro Sato

Kenji Iwasaki

Hidehisa Mita

Takashi Nojo

Motomichi Ochiai

Kei Shioya

Shunji Ichikawa

Naoyuki Yoshizumi

Hiroshi Ohira

A natural gas refining apparatus including a first separation membrane unit including a first separation membrane; and a second separation membrane unit provided in a subsequent stage of the first separation membrane unit. The second separation membrane unit includes a second separation membrane that allows an amine solution to circulate through the second separation membrane unit, and the natural gas refining apparatus refines raw natural gas containing COby passing the raw natural gas through the first and second separation membrane units, separating CO-rich gas with the first and second separation membranes, and absorbing COwith the amine solution circulating through the second separation membrane unit.

Natural gas refining apparatus and system

A system and method for separating COfrom natural gas, which ensure that no clogging or deterioration occurs in a gas separation membrane even after the gas separation membrane is used to remove carbon dioxide from the natural gas under conditions in which the natural gas is pressurized. First, an HS remover removes hydrogen sulfide from raw natural gas. Then, a compressor pressurizes the natural gas from which HS has been removed. After that, a cooler cools the pressurized natural gas so as to condense components that are a part of the natural gas. A gas/liquid separator removes the condensed components, and a COseparator, including a separation membrane for separating COremoves COfrom the natural gas from which the condensed components have been removed. An expander, which shares a drive shaft with the compressor, expands the natural gas from which COhas been removed and recovers energy therefrom.

System and method for separating carbon dioxide from natural gas

A water treatment system includes a first demineralizing section that separates water to be treated including Ca ions, SOions, and carbonate ions into concentrated water and treated water; a crystallizing section including a first crystallizing tankthat crystallizes gypsum from the concentrated water and a first seed crystal supplying sectionthat supplies seed crystals of gypsum to the first crystallizing tank; a first pH measuring sectionthat measures the pH of the first concentrated water in the first crystallizing tank; and a first controlling section that reduces the amount of the seed crystals of the gypsum to be supplied when the measured pH falls within a pH range in which a scale inhibition function of the calcium scale inhibitor is reduced, and increases the amount of the seed crystals of the gypsum to be supplied when the measured pH is beyond the pH range.

Water treatment process and water treatment system

Provided are a water treatment system and a water treatment process, which are capable of reproducing water containing salts with high water recovery. In the water treatment system () and the water treatment process of the present invention, after a calcium scale inhibitor and a silica scale inhibitor are supplied to water to be treated containing Ca ions, SOions, carbonate ions, and silica, and the water to be treated is separated in a second demineralizing section () into second concentrated water in which the Ca ions, the SOions, the carbonate ions, and the silica are concentrated and treated water. In a second crystallizing section (), seed crystals of gypsum are supplied to the second concentrated water, whereby gypsum is crystallized and removed from the second concentrated water.

Provided are a water treatment system and a water treatment process, which are capable of reproducing water containing salts with high water recovery. A water treatment systemcomprises a second demineralizing sectionthat separates water to be treated containing Ca ions, SOions and carbonate ions into concentrated water in which the Ca ions and the SOions are concentrated and treated water; a crystallizing section which is positioned on a downstream side of the second demineralizing sectionand which includes a second crystallizing tankthat crystallizes gypsum from the concentrated water and a seed crystal supplying section that supplies seed crystals of gypsum to the second crystallizing tank; and a separating section that is positioned on a downstream side of the crystallizing section and separates the gypsum from the concentrated water.

In a water treatment system () and a water treatment process, a scale inhibitor is supplied to water to be treated containing Ca ions, SOions, carbonate ions, and silica, and the water to be treated is adjusted to a pH at which silica is soluble. The pH-adjusted water to be treated containing the calcium scale inhibitor is separated in a demineralizing section () into concentrated water and treated water. In a crystallizing section (), seed crystals of gypsum are supplied to the concentrated water, whereby gypsum is crystallized and removed. Silica in the water to be treated is removed from the concentrated water on the downstream side of the crystallizing section (). Calcium carbonate in the water to be treated is removed from the concentrated water on the upstream side of the demineralizing section () or the downstream side of the crystallizing section ().

In a water treatment system and a water treatment process, a scale inhibitor is supplied to water to be treated containing Ca ions, SOions, carbonate ions, and silica, and the water to be treated is adjusted to a pH at which silica is soluble. The pH-adjusted water containing the calcium scale inhibitor is separated in a first demineralizing section into concentrated and treated water. In a first crystallizing section, seed crystals of gypsum are supplied to the first concentrated water, whereby gypsum is crystallized and removed from the first concentrated water. Silica in the water to be treated is removed from the first concentrated water on the downstream side of the first crystallizing section. Calcium carbonate in the water to be treated is removed from the first concentrated water on the upstream side of the first demineralizing section or the downstream side of the first crystallizing section.

A steam reformer generates reformed gas by a steam-reforming reaction of hydrocarbon gas such as natural gas. A methanol synthesis column and a gasoline synthesis column synthesize gasoline from the reformed gas via methanol and produce a liquid fuel. A superheater superheats a part of low-pressure steam that has been heat-recovered from the reformed gas with a part of middle-pressure steam that has been heat-recovered by the methanol synthesis column or the gasoline synthesis column, and the steam thereby brought into an unsaturated state is supplied to a low-pressure steam turbine.

Method and system for producing liquid fuel and generating power

An absorbent according to the present invention absorbs COor HS contained in flue gas emitted from a power generating plant such as a thermal plant, and contains three or more amine compounds selected from linear or cyclic amine compounds having a primary amino group, and linear or cyclic amine compounds having a secondary amino group. By way of a synergetic effect of the mixture of these compounds, the absorption speed of COor HS absorption is improved. A small amount of COcontained in a large amount of boiler flue gas can be absorbed efficiently.

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A gas-liquid contacting plate of the present invention in which a treatment liquid flows from an upper side to a lower side direction of a substrate and a part of gas being in contact with the treatment liquid is absorbed into the treatment liquid, includes a downward protruding saw teeth-shaped portion in which a lower end side of the substrate has pitches at predetermined gaps. Further, a pore group for liquid dispersion having a predetermined gap is provided in a plurality of lines, in the substrate. An arrangement thereof is a zigzag arrangement.

Gas-liquid contacting plate, gas-liquid contacting laminated block body, gas-liquid contacting laminated structure and gas purification device

A coal reforming apparatus includes: a dryer body provided to dry low-quality coal; a pyrolysis body which pyrolyzes the dried coal thus dried; and a briquetter which compression-molds the pyrolyzed coal thus pyrolyzed. The coal reforming apparatus has a radical scavenger supplier which supplies drying gas with a radical scavenger so that the low-quality coal can be dried in an atmosphere containing the radical scavenger, the drying gas being supplied from a drying gas supply source and heated by a heater, the radical scavenger being formed of an organic compound having a hydroxyl group.

Coal reforming apparatus

An absorbent liquid according to the present invention is an absorbent liquid for absorbing COor HS or both from gas, in which the absorbent liquid includes an alkanolamine as a first compound component, and a second component including a nitrogen-containing compound having in a molecule thereof two members or more selected from a primary nitrogen, a secondary nitrogen, and a tertiary nitrogen or a nitrogen-containing compound having in a molecule thereof all of primary, secondary, and tertiary nitrogens. The absorbent liquid has an excellent absorption capacity performance and an excellent absorption reaction heat performance, as compared to an aqueous solution containing solely an alkanolamine and a nitrogen-containing compound in the same concentration in terms of wt %, and can recover COor HS or both from gas with smaller energy.

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Tokyo, Japan

Ryuji Yoshiyama