Mitsubishi Heavy Industries Engineering, Ltd.

Akiyori Hagimoto

Tsuyoshi Oishi

Atsuhiro Yukumoto

Tsutomu Hamada

Hiroshi Tanaka

Takuya Hirata

Haruaki Hirayama

Shinya Tachibana

An olefin and methanol co-production plant for co-production of an olefin and methanol from a source gas containing methane includes: an olefin production unit for producing the olefin; and a methanol production unit for producing methanol from a carbon oxide gas in the olefin production unit. The olefin production unit includes a partial oxidative coupling device for producing the olefin by partial oxidative coupling reaction of methane contained in the source gas. The methanol production unit includes a reforming device for producing hydrogen by reforming reaction of methane, and a methanol production device for producing methanol by reaction with hydrogen produced by the reforming device. At least one of the reforming device or the methanol production device is configured to perform reaction using the carbon oxide gas in the olefin production unit.

Olefin and methanol co-production plant and olefin and methanol co-production method

A reclaiming method is disclosed including conducting evaporation by introducing a part of the absorbent to recover COor HS in a gas in a closed system recovery unit and separating a degraded substance contained in the absorbent from the absorbent to be introduced into an evaporator and obtain recovery steam containing an absorbent and COor HS by a heating section that is provided on a circulation line that circulates in the evaporator; and removing ionic degraded substance by cooling the concentrate obtained in the evaporation and removing an ionic degraded substance in the concentrate after the cooling, wherein a purified concentrate from which the ionic degraded substance has been removed is reused as a purified absorbent.

Reclaiming method

An evaporator is provided that separates, from a degraded substance, an absorbent branched off and introduced, a heating section which is interposed on a circulation line Lthat circulates the absorbent introduced into this evaporator, heats the circulating absorbent to obtain gaseous recovery steam containing a vaporized absorbent and CO, a concentrate branch line Lthat branches off a part of the absorbent circulating through the circulation line Lat a bottom of the evaporator from the circulation line Las a concentrate, a cooler that is interposed on this concentrate branch line Land cools the concentrate, an ionic degraded substance removal section that removes an ionic degraded substance in the cooled concentrate, and a purified absorbent discharge line Lthat reuses the concentrate as a purified absorbent from which the ionic degraded substance is removed.

Reclaiming device, reclaiming method, and recovery unit for COor HS or both

A COrecovery unit and a COrecovery method capable of having an excellent COabsorption rate and saving energy are provided. A COrecovery unit of the invention includes: a COabsorber which includes an upper COabsorption unit obtaining a COabsorbent by causing a flue gas containing COto contact a COabsorbent and a lower COabsorption unit obtaining a COabsorbent by causing the COabsorbent to contact a flue gas containing CO; a COabsorbent regenerator which obtains the COabsorbent by heating the COabsorbent a thermometer which measures a temperature of the COabsorbent supplied from the COabsorber to the COabsorbent regenerator; and a control device which controls a temperature of the COabsorbent supplied to the lower COabsorption unit based on the temperature of the COabsorbent measured by the thermometer.

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Tokyo, Japan

Akiyori Hagimoto