Mitsubishi Heavy Industries Limited

Other

Mitsubishi Gas Chemical Company, Inc.

The Kansai Electric Power Co., Inc.

Plus Corporation

Naoto Fukasawa Design Ltd.

Tetsuya Imai

Kazuto Kobayashi

Yoshio Seiki

Hiroyuki Osora

Kazuhiro Morita

Keiji Fujikawa

Shuichi Miyamoto

Chie Kuwada

Hiroshi Tanaka

Masaki Iijima

Tatsuya Tsujiuchi

Tsuyoshi Oishi

Takuya Hirata

Hiromitsu Nagayasu

Yasuyuki Yagi

Masanao Yonemura

Toshinobu Yasutake

Masahiko Tatsumi

Susumu Okino

Naoto Fukasawa

Kazuhiko Kaibara

Shinya Tachibana

Hideaki Nagai

Atsushi Tsukamoto

So Kubota

Ryo Yasui

Masaki Iljima

Stapler

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

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Paper cutter

A CO shift catalyst according to the present invention reforms carbon monoxide (CO) contained in gas. The CO shift catalyst is prepared from one or both of molybdenum (Mo) and cobalt (Co) as an active ingredient and an oxide of one of, or a mixture or a compound of, titanium (Ti), silicon (Si), zirconium (Zr), and cerium (Ce) as a carrier for supporting the active ingredient. The CO shift catalyst can be used in a halogen-resistant CO shift reactor () that converts CO contained in gasified gas () generated in a gasifier () into CO.

CO shift catalyst, CO shift reactor, and method for purifying gasified gas

Provided are high-pressure, medium-pressure, and low-pressure turbines; a boiler to generate steam for driving the turbines; a carbon dioxide recovery unit including an absorber that reduces carbon dioxide in combustion flue gas from the boiler by a carbon dioxide absorbent and a regenerator that regenerates an absorbent; a first auxiliary turbine that extracts steam from an inlet of the low-pressure turbine and recovers power by the steam thus extracted; a first steam delivery line to supply discharged steam from the first auxiliary turbine to a reboiler of the regenerator as a heat source; and a controller that controls driving of the first auxiliary turbine while keeping pressure of the discharged steam to be supplied to the reboiler within a tolerance range for the reboiler's optimum pressure corresponding to a fluctuation in an operation load of the boiler.

Carbon dioxide recovery system and method

A CO shift catalyst according to the present invention is one that reforms carbon monoxide (CO) in gas. The CO shift catalyst includes: active ingredients including one of molybdenum (Mo) and iron (Fe) as a main ingredient and one of nickel (Ni) and ruthenium (Ru) as an accessory ingredient; and one or at least two oxides of titanium (Ti), zirconium (Zr), and cerium (Ce) as a carrier supporting the active ingredients. The CO shift catalyst can be used for a CO shift reactorthat converts CO in gasified gasproduced in a gasifierinto CO.

A method of manufacturing methanol comprises producing a synthesis gas, recovering carbon dioxide from combustion exhaust gas by a carbon dioxide recovery apparatus provided with a carbon dioxide absorption tower and a carbon dioxide-absorbing solution regenerating tower, feeding the carbon dioxide to the upstream side and/or the downstream side of a reformer, allowing reaction of the synthesis gas to produce a reaction product, recovering a liquid crude methanol, and distilling the liquid crude methanol in a distillation apparatus provided with a topping tower, a pressure distillation tower and an atmospheric distillation tower to isolate refined methanol. Bottom liquid of the topping tower is heated and introduced into the pressure distillation tower, and the heat of distilled liquid discharged from this tower is utilized as a heat source for the regenerating tower and as a heat source for the atmospheric distillation tower.

Method of manufacturing methanol

A method of manufacturing methanol comprising producing a synthesis gas containing hydrogen, carbon monoxide and carbon dioxide, allowing reaction of the synthesis gas to take place over a catalyst to produce a crude methanol, separating the crude methanol into unreacted gas and liquid crude methanol, and distilling the liquid crude methanol to separate it into refined methanol and waste water. Carbon dioxide in combustion exhaust gas to be discharged from a reformer is recovered, and that in feeding the carbon dioxide to the upstream side and/or the downstream side of the reformer, part of the unreacted gas is utilized as a purge gas, a portion of which being utilized as a fuel for a combustion device of the reformer, while the balance of the purge gas being utilized as a fuel for other heating sources and/or as an agent for desulfurizating raw gas.

A reactor comprises a plurality of triple tubes having reaction tube, inner tube and central tube and disposed in a main body of the reactor, a first supply port formed in the main body and communicated with the central tube, and a second supply port formed in the main body and communicated with an annular space of triple tubes. The raw material introduced from the first supply port is fed into the catalyst layer to permit the reaction of the raw material to take place, and that as the activity of the catalyst is gradually lowered, the quantity of raw material to be fed to the first supply port is correspondingly reduced, and the quantity of raw material corresponding to this reduction of raw material is fed from the second supply port to the catalyst layer charged in the annular space.

Method of conducting an exothermic reaction

There is disclosed a method of manufacturing a synthesis gas comprising reacting hydrocarbons with water vapor in a reformer to produce a synthesis gas containing hydrogen, carbon monoxide and carbon dioxide, recovering carbon dioxide from combustion exhaust gas which has been discharged from the reformer by a carbon dioxide recovery apparatus provided with a carbon dioxide absorption tower and with a carbon dioxide-absorbing liquid regenerating tower, and feeding the carbon dioxide thus recovered, as a component of raw gas, to the upstream side and/or the downstream side of the reformer. The hot synthesis gas produced in the reformer is utilized as a heat source for regenerating a carbon dioxide-absorbing liquid in the carbon dioxide-absorbing liquid regenerating tower of the carbon dioxide recovery apparatus.

Method for manufacturing synthesis gas and method for manufacturing methanol

A process is provided for producing a nitrogen gas, useful in the petroleum industry, by combusting fuel with air in a &ldquo;once through&rdquo;-type boiler and injecting a supplemental fuel, such as natural gas, into the exhaust gas at a location just before a combustion catalyst that promotes the reaction between this supplemental fuel and the residual oxygen present in the exhaust gas. This oxygen-diminished, exhaust gas is then passed through a heat exchanger, where it transfers its heat to the air entering the boiler.

Method for reducing oxygen content in a boiler exhaust gas

A raw material gas containing hydrocarbon as a main component is supplied together with steam to a reformer through a moistening device to form a synthetic gas containing hydrogen, carbon monoxide and carbon dioxide as main components by the reaction between the hydrocarbon contained in the raw material gas and the steam. In forming the synthetic gas, carbon dioxide is supplied to at least one fluid passageway selected from the group consisting of the fluid passageway positioned upstream of the moistening device and the fluid passageway interposed between the moistening device and the reformer. As a result, the excess hydrogen contained in the gas formed in the reformer is effectively utilized without bringing about deactivation of the methanol synthesizing catalyst in the methanol synthesizing step. Also, carbon dioxide is effectively utilized to decrease the amount of carbon dioxide discharged to the outside of the system. Further, it is possible to decrease the amount of steam supplied to the reformer.

In a combined power generation plant, an exhaust gas boiler (2) consists of a high-pressure reheat type steam system, in which fuel is supplied to this exhaust gas boiler 2, and the supplied fuel undergoes catalytic reaction in combustion catalysis sections (NOx removal sections) 18 and 19 to increase the temperature of exhaust gas, whereby the power generation efficiency is improved.

Growing community of inventors

Tokyo, Japan

Tetsuya Imai