Mitsubishi Heavy Industries Limited

Mitsubishi Heavy Industries Engineering, Ltd.

Mitsubishi Hitachi Power Systems Environmental Solutions, Ltd.

The Kansai Electric Power Co., Inc.

Tomoki Noborisato

Takuya Hirata

Hiromitsu Nagayasu

Hiroshi Tanaka

Takashi Kamijo

Tsuyoshi Oishi

Takao Tanaka

Yasutoshi Ueda

Masaya Kato

Tatsuya Tsujiuchi

Yoshinori Kajiya

A carbon dioxide recovery system includes: a plurality of absorption towers each disposed for each of a plurality of combustion equipments for absorbing carbon dioxide in an exhaust gas discharged from each of the plurality of combustion equipments into an absorption liquid by bringing the exhaust gas into contact with the absorption liquid; and at least one regeneration tower communicating with each of the plurality of absorption towers, for recovering carbon dioxide from a COrich absorption liquid which is the absorption liquid flowing out of each of the plurality of absorption towers. The regeneration tower is smaller in number than the absorption towers.

Carbon dioxide recovery system and carbon dioxide recovery method

A composite amine absorbent according to the present invention is an absorbent for absorbing COor HS, or both of COand HS in a gas. The absorbent is obtained by dissolving (1) a linear monoamine, (2) a diamine, and (3) propylene glycol alkyl ether, for example, represented by the following chemical formula (I) in water. In the composite amine absorbent, the components complexly interact, and the synergistic effect thereof provides good absorbability of COor HS, or both of COand HS and good releasability of COor HS absorbed during regeneration of the absorbent. Furthermore, the amount of water vapor in a reboilerused during regeneration of the absorbent in a COrecovery unitcan be reduced.R&#x2014;O&#x2014;(R&#x2014;O)&#x2014;R&#x2003;&#x2003;(I)

Composite amine absorbent, and device and method for removing CO2 or H2S, or both of CO2 and H2S

Provided are: a wet desulfurization apparatuswhich removes sulfur oxides in flue gasA from a boiler; a mist collection/agglomeration apparatuswhich is provided on a downstream side of the desulfurization apparatusand forms agglomerated SOmist by causing particles of SOmist contained in flue gasB from the wet desulfurization apparatusto be bonded together and have bloated particle sizes; a COrecovery apparatusconstituted by a COabsorption towerhaving a COabsorption unitA which removes COcontained in flue gasD by being brought into contact with a COabsorbent and an absorbent regeneration towerwhich recovers COby releasing COfrom the COabsorbent having absorbed COand regenerates the COabsorbent; and a mist collection unitC which collects COabsorbent bloated mist bloated by the COabsorbent being absorbed by the agglomerated SOmist in the COabsorption unitA.

Flue gas treatment system and method

A wet desulfurization apparatus which removes sulfur oxides in flue gas from a boilerincludes a mist collection/agglomeration apparatus which is provided on a downstream side of the desulfurization apparatus and forms agglomerated SOmist by causing particles of SOmist contained in flue gasB from the wet desulfurization apparatus to be bonded together and have bloated particle sizes; a COrecovery apparatus constituted by a COabsorption tower having a COabsorption unit which removes COcontained in flue gas by being brought into contact with a COabsorbent and an absorbent regeneration tower which recovers COby releasing COfrom the COabsorbent having absorbed COand regenerates the COabsorbent; and a mist collection unit which collects COabsorbent bloated mist bloated by the COabsorbent being absorbed by the agglomerated SOmist in the COabsorption unit.

A filtration membrane device which uses a filter to collect solid contents remaining in a branched lean solution cleans the filter by using a low-concentration COabsorption liquid circulating within the system as cleaning water (containing the absorption liquid); rough cleaning, which returns the low-concentration COabsorption liquid used for cleaning to a lean solution supply line, is performed; the filter is finish-cleaned by cleaning water from outside the system which does not include the COabsorption liquid; the COabsorption liquid which is adhered to the solid contents is washed and removed; finish-cleaning water which includes the COabsorption liquid is returned to the lean solution supply line the moisture content within the system is maintained at a prescribed value by adjusting the water balance in an absorption tower and the concentration of the COabsorption liquid which circulates within the system is kept at a prescribed concentration.

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An air pollution control system includes: a desulfurization device which removes sulfur oxides in a flue gas generated from a boiler; a cooler which is provided at the downstream side of the desulfurization device, decreases a flue gas temperature and enlarges a particle diameter of SOmist contained in the flue gas through cooling or heating the flue gas by a temperature adjustment means for adjusting a gas dew point temperature of the flue gas; and a COrecovery device which includes a COabsorber bringing COin the flue gas into contact with the COabsorbent so as to remove COtherefrom and a regenerator recovering COby dissociating COfrom the COabsorbent and regenerating the COabsorbent, wherein the flue gas is cooled by a cooling unit so as to enlarge the SOmist in the flue gas.

Growing community of inventors

Tokyo, Japan

Tomoki Noborisato