Mitsubishi Heavy Industries Limited

Mitsubishi Jukogyo Kabushiki Kaisha

Kabushiki Kaisha Meiji Gomu Kasei

Mitsubishi Heavy Industries Engineering, Ltd.

Toyoshi Nakagawa

Kiyoshi Okazoe

Susumu Okino

Takashi Kamijo

Tatsuya Tsujiuchi

Tsuyoshi Oishi

Toru Takashina

Hiromitsu Nagayasu

Naohiko Ukawa

Kazuaki Kimura

Koichiro Iwashita

Yuichiro Sato

Hiroshi Tanaka

Akihiro Kojima

Takuya Hirata

Atsushi Tatani

Ryuji Yoshiyama

Shinya Kishimoto

Osamu Miyamoto

Shigeo Hasegawa

Keiji Fujikawa

Yoshinori Kajiya

Katsufumi Inoue

Atsushi Yoshioka

Hiroshi Tsubone

Yoshimitsu Kawanishi

Shoichi Onishi

Tetsuya Maruoka

Shunji Ichikawa

Kei Shioya

Motomichi Ochiai

Daijirou Ogino

Akihiko Tanigaki

Naoyuki Yoshizumi

A gas-liquid contactor includes a plurality of spray nozzles provided in a COabsorber, for spraying a COabsorbent downward into the COabsorber in which flue gas drifts upward and passes so as to bring flue gas drifting upward and the COabsorbent into contact with each other. The spray nozzle includes a wall-surface dedicated nozzle provided along a wall surface in the COabsorber and a liquid dispersion nozzle provided inside of the wall-surface dedicated nozzle in the COabsorber.

Gas-liquid contactor and CO2 recovery unit

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

[Problem] To provide a system for recovering carbon dioxide from flue gas, in which a reboiler in a regenerator can be compactly installed, and a method therefor, in facilities where COor the like contained in flue gas is recovered. [Solving Means] To include an absorberthat absorbs COcontained in flue gas, a regeneratorthat strips COfrom COabsorbent (rich solution)to regenerate absorbent, internal shellsprovided at a bottom of the regeneratorwith a predetermined interval therebetween, into which regenerated COabsorbent is introduced by a feeding unitfrom a bottom side thereof so that the COabsorbent overflows from an upper end of the internal shell thereof toward the bottom of the regenerator, and a reboiler that is inserted into the internal shellsin a direction orthogonal to a vertical axis and includes a heat-transfer tubethat reboils absorbent. Steam separated from COabsorbent reboiled by the heat-transfer tubeis transferred to an upper part of a regenerator, condensed absorbent is caused to overflow from an upper end of the internal shell and to be discharged from a bottom side of a regenerator, and the absorbent is fed to the absorberas regenerated COabsorbent (lean solution)

System and method for recovering carbon dioxide from flue gas

This invention relates to a flue gas treating process including a heat recovery step for recovering heat from flue gas by means of a heat exchanger (,) and thereby cooling the flue gas, and a subsequent absorption step for bringing the flue gas into gas-liquid contact with an absorbing fluid (D) in absorption towers (,) so as to remove at least SO,present in the flue gas by absorption into the absorbing fluid (D), which is characterized, for example, in that a powder addition step for spraying a powder collectable in the absorption step into the flue gas is provided prior to the heat recovery step. This invention makes it possible to provide a flue gas treating process in which a countermeasure against SO,present in flue gas can be easily achieved without resorting to ammonia injection and the flue gas can further be purified without the disadvantage of causing the injected substance to remain in the treated flue gas.

Flue gas treating process and system

Flue gas is treated for the presence of SO.sub.3, without resorting to ammonia injection, by adding a powder into the flue gas and subsequently bringing the flue gas into gas-liquid contact with an absorbing fluid, whereby the SO.sub.2 present in the flue gas is removed by absorption into the absorbing fluid. The treatment process may also include introducing the flue gas into a dust collector, whereby dust, including the powder present in the flue gas, is collected, and/or recovering heat from the flue gas by means of a heat exchanger, whereby the flue gas is cooled. A system for treating flue gas is also provided.

This invention relates to a flue gas treating system including a desulfurization apparatus for bringing flue gas into contact with a calcium compound-containing slurry so as to cause sulfur dioxide present in the flue gas to be absorbed into the slurry, oxidizing the slurry having undergone contact with flue gas, and subjecting the oxidized slurry to solid-liquid separation so as to obtain gypsum as a by-product; a waste water treating apparatus for treating part of a first filtrate produced during solid-liquid separation of the slurry having undergone contact with flue gas in the desulfurization apparatus; and solid-liquid separation device for subjecting sludge produced in the waste water treating apparatus to solid-liquid separation independently of the slurry having undergone contact with flue gas, wherein a solid material separated from the sludge by the solid-liquid separation device is incorporated into the gypsum and all of a second filtrate produced during solid-liquid separation of the sludge by the solid-liquid separation device is introduced into the waste water treating apparatus together with part of the first filtrate. In this system, the dumping disposal of sludge produced in the waste water treating apparatus is not required and the concentration of impurities in the absorbent slurry within the desulfurization apparatus can be kept on a low level.

Flue gas treating system

A wet flue-gas desulfurization system which effectively reduces the mist concentration in the treated gas at its outlet. The system includes an absorption column, formed with a tank at the bottom which is supplied with an absorbent slurry and a circulating pump for forcing the slurry upwardly from the tank into the flue gas inlet at the top of the column for contact with flue gas. Sulfur dioxide, for example, is removed from the flue gas, being introduced in the flue gas inlet, by absorption with the absorbent slurry. The treated gas, free of sulfur dioxide, is discharged through a gas-outlet duct formed to rise integrally from the top of an end part of the tank. For reducing the mist concentration a mist eliminator is provided and is held upright, as a vertical partition, across the riser of the duct, with the lower end of the eliminator being extended partly into the bath of the absorbent slurry inside the tank.

Wet flue-gas dsulfurization system

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Tokyo, Japan

Toyoshi Nakagawa