Mitsubishi Heavy Industries Limited

Hiroshi Tsubone

Takashi Kamijo

Tsuyoshi Oishi

Haruaki Hirayama

Osamu Miyamoto

Shinji Ogino

Toyoshi Nakagawa

Katsufumi Inoue

Shigeru Nishida

Ken Shoji

Taiji Sato

A sealing structure for a cylindrical body has an O-ring holder in which a planar O-ring that provides a seal in the planar direction and a radial O-ring that provides a seal in the axial line direction of the cylindrical body are incorporated in the crossing direction provided at both end parts of the cylindrical body; a pressing means for pressing the O-ring holder in the axial line direction of the cylindrical body via a pressing lid; the O-ring holder is pressed against a tube sheet of the fluid chamber via the pressing lid by the pressing means to press the planar O-ring onto the tube sheet, whereby a fluid tight seal is provided between the fluid chamber and the outside; and the radial O-ring is pressed onto the outer periphery of the cylindrical body to provide a fluid tight seal between the fluid passage and the fluid chamber.

Sealing structure for cylindrical body

[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

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Yokohama, Japan

Hiroshi Tsubone