Mitsubishi Heavy Industries Limited

The Kansai Electric Power Co., Inc.

Mitsubishi Heavy Industries Engineering, Ltd.

Nippon Nyukazai Co., Ltd.

Kabushiki Kaisha Meiji Gomu Kasei

Mitsubishi Heavy Industries Thermal Systems, Ltd.

Tsuyoshi Oishi

Hiroshi Tanaka

Takuya Hirata

Hiromitsu Nagayasu

Tatsuya Tsujiuchi

Takashi Kamijo

Atsuhiro Yukumoto

Yasuyuki Yagi

Susumu Okino

Naoyuki Kamiyama

Masaki Iijima

Tatsuto Nagayasu

Masayuki Inui

Keiji Fujikawa

Takahiko Endo

Tomio Mimura

Masahiko Tatsumi

Ryuji Yoshiyama

Toru Takashina

Shinji Nakamura

Yasuhiro Takeuchi

Masazumi Tanoura

Yukihiko Inoue

Osamu Miyamoto

Tetsuya Imai

Kazuhiko Kaibara

Yoshio Nakayama

Kenji Saito

Shintaro Honjo

Naohiko Ukawa

Kouki Ogura

Shinya Tachibana

Tsutomu Hamada

Toyoshi Nakagawa

Akihiro Kojima

Hiroaki Ito

Kenichi Murakami

Seiji Yoshihara

Daisuke Shimada

Shimpei Kawasaki

Akiyori Hagimoto

Chikayuki Nagata

Satoshi Nakamura

Tsuyoshi Dohi

Ryosuke Araki

Tomoki Noborisato

Kenichi Okada

Yoshinori Kajiya

Katsufumi Inoue

Hidehisa Mita

Shinsuke Nakatani

Masashi Yoshikawa

Kazuo Ishida

Shinichi Okamoto

Takahito Yonekawa

Haruaki Hirayama

Masaru Chiyomaru

Yoshiki Sorimachi

Yuichiro Sato

Mikiya Sakurai

Tsumoru Nakamura

Hiroshi Tsubone

Koji Kadono

Shunji Ichikawa

Kei Shioya

Motomichi Ochiai

Kouzou Takano

Syusaku Goto

Masaki Iljima

Tetsuji Fujino

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

SOremoval equipment for reducing sulfur oxides from flue gas from a boiler, a cooler which is provided on a downstream side of the SOremoval equipment for reducing the sulfur oxides that remain in the flue gas and for decreasing a gas temperature, COrecovery equipment which includes a COabsorber, and an absorption liquid regenerator, and mist generation material reduction equipment for reducing a mist generation material which is a generation source of mist that is generated in the COabsorber of the COrecovery equipment before introducing the flue gas to the COrecovery equipment are included.

Air pollution control system and method

An absorption column is equipped with: a COabsorption section absorbing COfrom CO-containing exhaust gas using a lean solution; a main rinse section recovering an entrained COabsorbent using rinse water; a rinse water circulation line circulating a rinse water containing the COabsorbent recovered in a liquid storage section of the main rinse section; a pre-rinse section provided between the COabsorption section and the main rinse section; a rinse section extraction liquid supply line extracting a portion of the rinse water containing the COabsorbent from the rinse water circulation line, and introducing the same into a reflux section of an absorption liquid regeneration tower; and a refluxed water supply line extracting a portion of refluxed water, introducing the same as pre-rinse water for the pre-rinse section, and connected on the pre-rinse section side.

COrecovery device and COrecovery 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

An absorbing liquid which absorbs the COor HS or both contained in a gas, and which comprises 1) at least one tertiary-monoamine main agent selected from a tertiary-monoamine group and 2) at least one secondary-diamine first additive selected from a secondary-diamine group, the secondary-diamine concentration being within the range of 0.05 to 0.5 in terms of the additive concentration index represented by the following expression (I). (Additive concentration index)=[(secondary-diamine acid dissociation index) (pKa)/(tertiary-monoamine acid dissociation index) (pKa)] (index ratio)&#xd7;[(secondary-diamine molar concentration) (mol/L)/(tertiary-monoamine molar concentration) (mol/L)] (molar ratio) (I).

Absorbing liquid, method for preparing absorbing liquid, and device and method for removing CO2 or H2S 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.

COrecovery unit and COrecovery method

A COrecovery apparatus is provided with: a COabsorption tower for bringing exhaust gas into contact with a COabsorbing liquid and making the COabsorbing liquid absorb the COcontained in the exhaust gas; a COabsorbing liquid regeneration tower for heating the COabsorbing liquid with steam and releasing COfrom the COabsorbing liquid and regenerating the COabsorbing liquid; a flowmeter for determining the flow rates of the exhaust gas introduced into the COabsorption tower; and a control unit for classifying the flow rates of the exhaust gas into multiple flow rate ranges, and controlling the flow rate of the COabsorbing liquid supplied to the COabsorption tower and the flow rate of steam supplied to the COabsorbing liquid regeneration tower on the basis of prescribed set load values which have been previously established in accordance with the multiple flow rate ranges.

COrecovery apparatus and COrecovery process

A COrecovery device includes: a COabsorption tower in which COincluded in an exhaust gas is absorbed by a COabsorption liquid; and a COabsorption liquid regeneration tower that heats and regenerates the COabsorption liquid that has absorbed CO. The COabsorption liquid regeneration tower includes: a main body part in which the COabsorption liquid is temporarily stored; a boot part provided downward from a tank end of the main body part, having a relatively smaller capacity than the main body part; a flowmeter provided to the boot part, and measuring the liquid surface level of the COabsorption liquid that changes between the main body part and the boot part; and a control device controlling the liquid surface level of the COabsorption liquid between the main body part and the boot part on the basis of the measurement result of the flowmeter.

[object Object]

An absorbent is prepared by dissolving in water 1) monoethanolamine (MEA) and 2) a primary amine represented by the following formula (1) and having high steric hindrance. Releasability of COor HS during regeneration of the absorbent is thereby improved, and the amount of water vapor used during regeneration of the absorbent in a facility for recovering COor HS can be reduced. Rto R: H or a hydrocarbon group having 1 to 3 carbon atoms, at least one of Rto Rbeing a hydrocarbon.

Provided are a reclaimerthat introduces, through a branch line L, and stores a partof an absorbentregenerated in a regenerator of a recovery unit that recovers COor HS in a gas, a first alkaline agent supply sectionA that supplies an alkaline agentto the reclaimer, a heating sectionthat heats the absorbentstored in the reclaimerand to which the alkaline agenthas been mixed to obtain recovered vapor, a first vapor coolerA that cools the recovered vapordischarged from the reclaimerthrough a vapor line L, a first gas-liquid separatorA that separates a coexisting substanceentrained in the cooled recovered vaporinto a recovered absorption agent vapor (gas)and the liquid coexisting substanceby gas-liquid separation, and an introduction line Lthat introduces the recovered absorption agent vaporseparated in the first gas-liquid separatorA into a regenerator

A gas-liquid contactor is obtained by including a header pipe for supplying washing water, in a direction perpendicular to a vertical axis direction, the header pipe being disposed above a packed bed contacting section through which exhaust gas moves upward and passes; and spray nozzles for discharging spray water, the nozzles being disposed, in an upward orientation, with predetermined intervals on the header pipe. The spray water that has been discharged from the spray nozzles is supplied at a low liquid flow rate. The discharged spray water becomes a liquid film and falls downward along the surface of the header pipe, and then falls and spreads in the packed bed contacting section, so that the washing water is made to contact the exhaust gas moving upward through the packed bed contacting section. Accordingly, the washing water is used to clear and remove water-soluble substances contained in the exhaust gas.

When COgas is absorbed by using an absorbent circulating in an absorption tower and an absorbent regeneration tower, a first sampling part at which a lean solution sample is collected in the vicinity of an inlet for a lean solution supply line in the absorption tower, a second sampling part at which a rich solution sample is collected in the vicinity of an outlet for a rich solution supply line in the absorption tower, and an analyzing device which analyzes the collected lean solution sample and rich solution sample are provided; the lean solution sample at the first sampling part and the rich solution sample at the second sampling part are collected, respectively, in the same time period, and concentrations of COgas in the lean solution sample and the rich solution sample are measured, and then the gas absorbing/regenerating operation is controlled based on measured results.

Gas absorbing and regenerating apparatus and method for operating same

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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Tokyo, Japan

Tsuyoshi Oishi