JP5232746B2 - Rectifier, CO2 recovery device - Google Patents

Rectifier, CO2 recovery device Download PDF

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JP5232746B2
JP5232746B2 JP2009213612A JP2009213612A JP5232746B2 JP 5232746 B2 JP5232746 B2 JP 5232746B2 JP 2009213612 A JP2009213612 A JP 2009213612A JP 2009213612 A JP2009213612 A JP 2009213612A JP 5232746 B2 JP5232746 B2 JP 5232746B2
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exhaust gas
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rectifier
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JP2011062608A (en
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剛 野中
展康 坂田
学 小田
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Mitsubishi Heavy Industries Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2

Description

本発明は、排ガス中のＣＯ2を吸収するＣＯ2吸収塔に送給する排ガスの流速を緩和する整流装置、ＣＯ2回収装置に関する。 The present invention includes a rectifier device to relieve the flow rate of feed to the CO 2 absorber that absorbs Kyusuru exhaust gas of CO 2 in the flue gas, to CO 2 recovery apparatus.

大量の化石燃料を使用する火力発電所などでは、ボイラにおいて化石燃料を燃焼させることで発生する排ガスをアミン系のＣＯ2吸収液（以下、「吸収液」ともいう。）と接触させて吸収液中にＣＯ2を吸収させることで、排ガス中のＣＯ2を除去、回収する方法及び回収されたＣＯ2を大気へ放出することなく貯蔵する方法が精力的に研究されている。吸収液を用い、排ガスからＣＯ2を吸収除去した後に、ＣＯ2を放散回収し、ＣＯ2吸収液は再生して再びＣＯ2吸収塔に循環して再利用する方法が開示されている（例えば、特許文献１、２参照）。 In a thermal power plant that uses a large amount of fossil fuel, the exhaust gas generated by burning fossil fuel in a boiler is brought into contact with an amine-based CO 2 absorbing liquid (hereinafter also referred to as “absorbing liquid”) and the absorbing liquid. A method of removing and recovering CO 2 in exhaust gas by absorbing CO 2 therein and a method of storing the recovered CO 2 without releasing it to the atmosphere have been energetically studied. A method is disclosed in which an absorption liquid is used to absorb and remove CO 2 from exhaust gas, and then CO 2 is diffused and recovered, and the CO 2 absorption liquid is regenerated and recycled to the CO 2 absorption tower for reuse (for example, Patent Documents 1 and 2).

また、ＣＯ2回収装置のＣＯ2冷却塔、ＣＯ2吸収塔においては、排ガスの冷却効率、排ガス中のＣＯ2の吸収液への回収効率を向上させるため、排ガスの流速は極力抑えてＣＯ2冷却塔、ＣＯ2吸収塔に送給する必要がある。そのため、ＣＯ2冷却塔、ＣＯ2吸収塔に送給される排ガスの流速は例えば４ｍ/ｓ以下に抑え、排ガスの整流を行なうようにしている。 Moreover, CO 2 cooling tower of the CO 2 recovery apparatus, in the CO 2 absorber, to improve cooling efficiency of the exhaust gas, the recovery efficiency of the absorption liquid CO 2 in the exhaust gas, the flow rate of the exhaust gas is minimized by CO 2 It is necessary to feed the cooling tower and the CO 2 absorption tower. Therefore, the flow rate of the exhaust gas supplied to the CO 2 cooling tower and the CO 2 absorption tower is suppressed to, for example, 4 m / s or less to rectify the exhaust gas.

特開２００８−１７４４０７号公報JP 2008-174407 A 特開２００８−２０７１２３号公報JP 2008-207123 A

排ガスを整流する方法として、例えばＣＯ2吸収塔の流入口付近の流路に多孔板を排ガスの流れ方向に直角するように配置し、発生する圧損により整流する方法、ＣＯ2吸収塔の流入口付近の流路断面積を拡大し、排ガスの流速を低減する方法、ＣＯ2吸収塔の流入口付近の流路内に整流板を設置し、流路の拡大に伴う剥離を低減し、流速を低減する方法などがある。 As a method of rectifying the exhaust gas, for example, a method of arranging a perforated plate in a flow path near the inlet of the CO 2 absorption tower so as to be perpendicular to the flow direction of the exhaust gas, and rectifying by the generated pressure loss, an inlet of the CO 2 absorption tower A method for reducing the flow rate of exhaust gas by enlarging the cross-sectional area of the nearby flow path, installing a rectifying plate in the flow path near the inlet of the CO 2 absorption tower, reducing separation due to expansion of the flow path, There are ways to reduce it.

図１１は、ＣＯ2吸収塔の流入口付近で排ガスを整流する方法の一例を示す図である。図１１に示すように、従来の整流装置１００は、排ガス１０１をＣＯ2吸収塔１０２に送給する煙道１０３とＣＯ2吸収塔１０２の流入口１０４との間に排ガス１０１が通過する流路断面積を拡大した流路拡大連結部１０５と、流路拡大連結部１０５内に設けたガイドベーン１０６と、ＣＯ2吸収塔１０２の流入口１０４付近に直角に配置した多孔板１０７と、で構成されている。従来の整流装置１００では、流路拡大連結部１０５において煙道１０３より送給される排ガス１０１の流速を低減し、流路拡大連結部１０５内に設けたガイドベーン１０６により流路の拡大に伴い発生する排ガス１０１の剥離を低減し、流速を低減している。ＣＯ2吸収塔１０２の流入口１０４付近に設けた多孔板１０７で発生する圧損により排ガス１０１を整流するようにしている。 FIG. 11 is a diagram showing an example of a method for rectifying exhaust gas near the inlet of a CO 2 absorption tower. As shown in FIG. 11, the conventional rectifier 100 has a flow path through which the exhaust gas 101 passes between the flue 103 that supplies the exhaust gas 101 to the CO 2 absorption tower 102 and the inlet 104 of the CO 2 absorption tower 102. It is constituted by a flow path expanding connection part 105 having an enlarged cross-sectional area, a guide vane 106 provided in the flow path expansion connection part 105, and a perforated plate 107 disposed at a right angle near the inlet 104 of the CO 2 absorption tower 102. Has been. In the conventional rectifier 100, the flow rate of the exhaust gas 101 fed from the flue 103 is reduced in the flow channel expansion connecting portion 105, and the guide vane 106 provided in the flow channel expansion connecting portion 105 is used to expand the flow channel. Peeling of the generated exhaust gas 101 is reduced, and the flow velocity is reduced. The exhaust gas 101 is rectified by the pressure loss generated in the perforated plate 107 provided in the vicinity of the inlet 104 of the CO 2 absorption tower 102.

しかしながら、従来の整流装置１００では、流路拡大連結部１０５で排ガス１０１の流路を急に拡大しているため、ＣＯ2吸収塔１０２内での排ガス１０１の流速の不均一化を招き、排ガス１０１の流速低減が十分に発揮されない場合がある、という問題がある。 However, in the conventional rectifier 100, since the flow path of the exhaust gas 101 is suddenly expanded by the flow path expansion connecting portion 105, the flow rate of the exhaust gas 101 in the CO 2 absorption tower 102 is made uneven, and the exhaust gas is exhausted. There is a problem that the reduction in the flow rate of 101 may not be sufficiently exhibited.

また、ガイドベーン１０６は流路拡大連結部１０５内に設置しているため、形状に制約があり、排ガス１０１の流速低減に十分な効果を発揮しない可能性がある上、特定方向にのみ排ガス１０１を流しやすくなる、という問題がある。   Further, since the guide vane 106 is installed in the flow path expansion connecting portion 105, there is a limitation on the shape, and there is a possibility that the guide vane 106 may not exhibit a sufficient effect for reducing the flow velocity of the exhaust gas 101, and the exhaust gas 101 only in a specific direction. There is a problem that it is easy to flow.

更に、多孔板１０７に圧損がかかりすぎると排ガス１０１がＣＯ2吸収塔１０２内で低流速側に流れてしまう、という問題がある。 Furthermore, if the porous plate 107 is subjected to excessive pressure loss, there is a problem that the exhaust gas 101 flows to the low flow rate side in the CO 2 absorption tower 102.

そのため、流路拡大連結部１０５、ガイドベーン１０６、多孔板１０７の影響により、ＣＯ2吸収塔１０２内での排ガス１０１の流れが干渉し合い、ＣＯ2吸収塔１０２内で排ガス１０１の上向きへの速い流れを発生させる虞がある、という問題がある。 Therefore, the flow path enlarged connecting portion 105, the guide vanes 106, under the influence of the perforated plate 107, mutually flow of the exhaust gas 101 is interference in the CO 2 absorber 102., to an upward exhaust gas 101 in the CO 2 absorber 102. There is a problem that there is a risk of generating a fast flow.

本発明は、上記に鑑みてなされたものであって、ＣＯ2吸収塔に流入する排ガスの上向きへの流速を均一にする整流装置、ＣＯ2回収装置を提供することを課題とする。 The present invention was made in view of the above, the rectifying device to equalize the flow velocity of the upward of the exhaust gas flowing into the CO 2 absorber, and to provide a CO 2 recovery apparatus.

上述した課題を解決するための本発明の第１の発明は、ＣＯ２を含有する排ガスとＣＯ２吸収液とを接触させて前記排ガス中のＣＯ２を除去するＣＯ２吸収塔に前記排ガスを送給する煙道の前記ＣＯ２吸収塔の入口付近に、前記排ガスと前記ＣＯ２吸収液とが接触するに領域に前記排ガスの流速を緩和する流速緩和部材が設けられ、前記流速緩和部材が、前記煙道と前記ＣＯ ２ 吸収塔との間に前記排ガスを水平方向に前記ＣＯ ２ 吸収塔に漸次拡大するように通過させる流路拡大連結部内に二つ以上設けられ、前記流路拡大連結部の高さ方向に前記排ガスが異なる方向に向かうように前記排ガスの流れを変化させることを特徴とする整流装置にある。 The first aspect of the present invention to solve the above problems, the exhaust gas to CO 2 absorption tower for contacting the exhaust gas and the CO 2 absorbing solution containing CO 2 to remove CO 2 in the flue gas feeding Kyusuru the entrance near the CO 2 absorption tower of the flue, the flow velocity reducing member, wherein the exhaust gas and the CO 2 absorbing solution to alleviate the flow rate of the previous SL gas to the region in contact is provided, wherein the flow velocity reducing member but the exhaust gases is provided horizontally on the CO 2 in the flow channel expanding connecting portion passing to gradually expand to the absorption tower more than one between the flue and the CO 2 absorption tower, the flow channel expanding In the rectifier, the flow of the exhaust gas is changed so that the exhaust gas is directed in different directions in the height direction of the connecting portion .

第２の発明は、第１の発明において、前記流速緩和部材が、前記煙道の中心軸のガス流れ方向に向かって前記流路拡大連結部の入口部から延設されることを特徴とする整流装置にある。 According to a second invention, in the first invention, the flow rate reducing member is extended from an inlet portion of the flow path expanding connection portion toward a gas flow direction of a central axis of the flue. In the rectifier.

第３の発明は、第１又は２の発明において、前記流速緩和部材に沿って設けられる補助整流板を複数有することを特徴とする整流装置にある。 A third invention is the rectifier according to the first or second invention, wherein the rectifier has a plurality of auxiliary rectifying plates provided along the flow velocity reducing member.

第４の発明は、第１乃至３の何れか一つの発明において、二つの流速緩和部材が設けられ、二つの流速緩和部材を連結する仕切り板を有することを特徴とする整流装置にある。 According to a fourth aspect of the present invention, there is provided the rectifier according to any one of the first to third aspects, further comprising: two flow rate reducing members, and a partition plate connecting the two flow rate reducing members.

第５の発明は、ＣＯ2を含有する排ガスを冷却水によって冷却する冷却塔と、第１乃至４の何れか一つの発明の整流装置と、冷却された排ガスとＣＯ2を吸収するＣＯ2吸収液とを接触させて排ガスからＣＯ2を除去するＣＯ2吸収塔と、ＣＯ2を吸収したＣＯ2吸収液からＣＯ2を放出させてＣＯ2吸収液を再生する再生塔と、を有することを特徴とするＣＯ2回収装置にある。 A fifth invention is a cooling tower for cooling the exhaust gas containing CO 2 with cooling water, a rectifying device according to any one invention of the first through 4, CO 2 absorption to absorb the cooled exhaust gas and CO 2 and the CO 2 absorber to remove CO 2 by contacting the liquid from the exhaust gas, a regeneration tower for reproducing CO 2 absorbing solution by releasing CO 2 from the CO 2 absorbent having absorbed CO 2, to have a It is in the characteristic CO 2 recovery device.

本発明に係る整流装置によれば、ＣＯ2吸収塔の入口付近に、排ガスとＣＯ2吸収液とが接触する領域において排ガスが適切な流速となるように排ガスの流速を緩和する流速緩和部材が設けられるため、ＣＯ2吸収塔に流入する排ガスの上向きの速い流れを低減し、流速を均一にすることができる。 According to the rectifier according to the present invention, the flow rate reducing member for reducing the flow rate of the exhaust gas so that the exhaust gas has an appropriate flow rate in the region where the exhaust gas and the CO 2 absorbing liquid are in contact with each other is provided near the inlet of the CO 2 absorption tower. Since it is provided, the upward fast flow of the exhaust gas flowing into the CO 2 absorption tower can be reduced and the flow rate can be made uniform.

図１は、本発明の第一の実施の形態に係る整流装置を備えたＣＯ2回収装置の構成を簡略に示す図である。FIG. 1 is a diagram schematically showing a configuration of a CO 2 recovery device provided with a rectifier according to a first embodiment of the present invention. 図２は、煙道とＣＯ2吸収塔とを連結する流路拡大連結部を簡略に示す斜視図である。FIG. 2 is a perspective view schematically showing an enlarged flow path connecting portion that connects the flue and the CO 2 absorption tower. 図３は、流路拡大連結部の部分切掻き図である。FIG. 3 is a partial cutaway view of the flow path expanding connection portion. 図４は、本発明による第一の実施の形態に係る整流装置の構成を簡略に示す図である。FIG. 4 is a diagram simply showing the configuration of the rectifier according to the first embodiment of the present invention. 図５は、本発明による第二の実施の形態に係る整流装置の構成を簡略に示す部分切掻き図である。FIG. 5 is a partial cut-away view schematically showing the configuration of the rectifier according to the second embodiment of the present invention. 図６は、本発明による第二の実施の形態に係る整流装置の構成を簡略に示す平面図である。FIG. 6 is a plan view schematically showing the configuration of the rectifier according to the second embodiment of the present invention. 図７は、本発明による第三の実施の形態に係る整流装置の構成を簡略に示す部分切掻き図である。FIG. 7 is a partial cut-away view schematically showing the configuration of the rectifier according to the third embodiment of the present invention. 図８は、本発明による第三の実施の形態に係る整流装置の構成を簡略に示す平面図である。FIG. 8 is a plan view schematically showing the configuration of the rectifier according to the third embodiment of the present invention. 図９は、本発明による第四の実施の形態に係る整流装置の構成を簡略に示す部分切掻き図である。FIG. 9 is a partial cutaway view schematically showing the configuration of the rectifier according to the fourth embodiment of the present invention. 図１０は、本発明による第四の実施の形態に係る整流装置の構成を簡略に示す図である。FIG. 10 is a diagram schematically showing the configuration of the rectifier according to the fourth embodiment of the present invention. 図１１は、ＣＯ2吸収塔の流入口付近で排ガスを整流する方法の一例を示す図である。FIG. 11 is a diagram showing an example of a method for rectifying exhaust gas near the inlet of a CO 2 absorption tower.

以下、この発明につき図面を参照しつつ詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。また、下記実施の形態における構成要素には、当業者が容易に想定できるもの、実質的に同一のもの、いわゆる均等の範囲のものが含まれる。   Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range.

［第一の実施の形態］
本発明による第一の実施の形態に係る整流装置を適用したＣＯ2回収装置について、図面を参照して説明する。
図１は、本発明の第一の実施の形態に係る整流装置を備えたＣＯ2回収装置の構成を簡略に示す図である。
図１に示すように、ＣＯ2回収装置１０は、ＣＯ2を含有する排ガス１１を水１２によって冷却する冷却塔１３と、冷却された排ガス１１とＣＯ2を吸収するＣＯ2吸収液１４とを接触させて排ガス１１からＣＯ2を除去するＣＯ2吸収塔１５と、ＣＯ2を吸収したＣＯ2吸収液（リッチ溶液）１６からＣＯ2を放出させてＣＯ2吸収液１４を再生する再生塔１７とを有する。 [First embodiment]
A CO 2 recovery device to which a rectifier according to a first embodiment of the present invention is applied will be described with reference to the drawings.
FIG. 1 is a diagram schematically showing a configuration of a CO 2 recovery device provided with a rectifier according to a first embodiment of the present invention.
As shown in FIG. 1, the CO 2 recovery apparatus 10 includes a cooling tower 13 that cools an exhaust gas 11 containing CO 2 with water 12, and a CO 2 absorbent 14 that absorbs the cooled exhaust gas 11 and CO 2. the contacted with the CO 2 absorption tower 15 for removing CO 2 from the exhaust gas 11, regenerator 17 CO 2 absorbent that has absorbed CO 2 by releasing CO 2 from (rich solution) 16 to reproduce the CO 2 absorbing liquid 14 And have.

ＣＯ2回収装置１０では、ＣＯ2吸収液１４はＣＯ2吸収塔１５と再生塔１７との間を循環しており、ＣＯ2吸収塔１５から再生塔１７にはＣＯ2を吸収したＣＯ2吸収液（リッチ溶液）１６が送給され、再生塔１７からＣＯ2吸収塔１５にはリッチ溶液１６から再生塔１７でほぼ全てのＣＯ2が除去され再生されたＣＯ2吸収液（リーン溶液）１４が送給されている。 In the CO 2 recovery apparatus 10, CO 2 absorbing liquid 14 is circulated between the CO 2 absorption tower 15 and the regeneration tower 17, CO 2 absorption has absorbed CO 2 in the regenerator 17 from the CO 2 absorber 15 The liquid (rich solution) 16 is fed, and almost all of the CO 2 is removed from the rich solution 16 in the regeneration tower 17 to the CO 2 absorption tower 15 from the regeneration tower 17, and the regenerated CO 2 absorbent (lean solution) 14. Has been sent.

例えばボイラやガスタービン等の産業設備から排出されたＣＯ2を含有する排ガス１１は、図示しない排ガス送風機により昇圧された後、冷却塔１３に送られ、冷却塔１３内で水１２と向流接触することにより冷却される。排ガス１１と熱交換して高温となった水１２は冷却塔１３の底部から抜き出され、冷却水１８により冷却され、排ガス１１の冷却用として循環して使用される。冷却された排ガス１１は冷却塔１３とＣＯ2吸収塔１５とを連結する煙道１９より冷却塔１３から排出される。 For example, the exhaust gas 11 containing CO 2 discharged from an industrial facility such as a boiler or a gas turbine is pressurized by an exhaust gas blower (not shown) and then sent to the cooling tower 13, where it counter-contacts with the water 12 in the cooling tower 13. It is cooled by doing. The water 12 heated to a high temperature by exchanging heat with the exhaust gas 11 is extracted from the bottom of the cooling tower 13, cooled by the cooling water 18, and circulated and used for cooling the exhaust gas 11. The cooled exhaust gas 11 is discharged from the cooling tower 13 through a flue 19 connecting the cooling tower 13 and the CO 2 absorption tower 15.

煙道１９はＣＯ2吸収塔１５の供給口２０に排ガス１１を水平方向に拡大させる通路を形成する流路拡大連結部２１が設けられている。冷却塔１３から排出される排ガス１１は煙道１９を通り、流路拡大連結部２１を通ってＣＯ2吸収塔１５に送られる。 The flue 19 is provided with a flow passage expansion connecting portion 21 that forms a passage for expanding the exhaust gas 11 in the horizontal direction at the supply port 20 of the CO 2 absorption tower 15. The exhaust gas 11 discharged from the cooling tower 13 passes through the flue 19, and is sent to the CO 2 absorption tower 15 through the flow path expansion connection portion 21.

図２は、煙道とＣＯ2吸収塔とを連結する流路拡大連結部を簡略に示す斜視図である。図２に示すように、流路拡大連結部２１は煙道１９とＣＯ2吸収塔１５との間に設けられ、流路拡大連結部２１の煙道１９との連結部分は、煙道１９の幅と同じ長さで形成されている。流路拡大連結部２１は煙道１９との連結部分から排ガス１１をＣＯ2吸収塔１５に向かって水平方向に漸次拡大して通過させるように形成されている。流路拡大連結部２１のＣＯ2吸収塔１５の供給口２０（図１、参照）との連結部分は、煙道１９の幅と同じ長さで形成されている。 FIG. 2 is a perspective view schematically showing an enlarged flow path connecting portion that connects the flue and the CO 2 absorption tower. As shown in FIG. 2, the flow path expanding connection portion 21 is provided between the flue 19 and the CO 2 absorption tower 15, and the connection portion of the flow path expanding connection portion 21 with the flue 19 is connected to the flue 19. It is formed with the same length as the width. The flow path expansion connecting portion 21 is formed so as to allow the exhaust gas 11 to gradually expand in the horizontal direction from the connection portion with the flue 19 toward the CO 2 absorption tower 15. The connecting portion of the channel expansion connecting portion 21 and the supply port 20 (see FIG. 1) of the CO 2 absorption tower 15 is formed with the same length as the width of the flue 19.

また、流路拡大連結部２１内には、本発明の第一の実施の形態に係る整流装置２２Ａが設けられている。整流装置２２ＡによりＣＯ2吸収塔１５内でＣＯ2吸収液１４と接触する際の排ガス１１の流速を減速するようにしている。 Moreover, in the flow path expansion connection part 21, the rectifier 22A which concerns on 1st embodiment of this invention is provided. The flow rate of the exhaust gas 11 when contacting the CO 2 absorbent 14 in the CO 2 absorption tower 15 is reduced by the rectifier 22A.

図３は、流路拡大連結部の部分切掻き図であり、図４は、本発明による第一の実施の形態に係る整流装置の構成を簡略に示す図であり、図４中、上側の図が平面図であり、図４中、下側の図が側面図である。
図２〜図４に示すように、本発明の第一の実施の形態に係る整流装置２２Ａは、ＣＯ2を含有する排ガス１１とＣＯ2吸収液１４とを接触させて排ガス１１中のＣＯ2を除去するＣＯ2吸収塔１５に排ガス１１を送給する煙道１９のＣＯ2吸収塔１５の入口付近に、排ガス１１とＣＯ2吸収液１４とが接触する領域において排ガス１１が適切な流速となるように排ガス１１の流速を緩和する流速緩和部材として整流板２３−１、２３−２が設けられている。 FIG. 3 is a partial cutaway view of the flow path expanding connection portion, and FIG. 4 is a view simply showing the configuration of the rectifier according to the first embodiment of the present invention. The figure is a plan view, and the lower figure in FIG. 4 is a side view.
Figure 2 As shown in Figure 4, the rectifier 22A according to the first embodiment of the present invention, the exhaust gas 11 and the CO 2 absorbing liquid 14 and is contacted CO 2 in the flue gas 11 containing CO 2 In the region where the exhaust gas 11 and the CO 2 absorbent 14 are in contact with each other in the vicinity of the inlet of the CO 2 absorption tower 15 of the flue 19 that supplies the exhaust gas 11 to the CO 2 absorption tower 15 that removes the exhaust gas 11, Rectification plates 23-1 and 23-2 are provided as flow rate reducing members for reducing the flow rate of the exhaust gas 11.

整流板２３−１、２３−２は、流路拡大連結部２１内に設けられ、流路拡大連結部２１の高さ方向に排ガス１１が異なる方向に向かうように排ガス１１の流れを変化させるようにしている。整流板２３−１、２３−２は、煙道１９の中心軸（図４中、一点鎖線部分）のガス流れ方向に向かって流路拡大連結部２１の入口部２４から延設されている。   The rectifying plates 23-1 and 23-2 are provided in the flow path expanding connection portion 21 so as to change the flow of the exhaust gas 11 so that the exhaust gas 11 is directed in different directions in the height direction of the flow path expanding connection portion 21. I have to. The rectifying plates 23-1 and 23-2 are extended from the inlet portion 24 of the flow path expanding connection portion 21 toward the gas flow direction of the central axis of the flue 19 (the dashed line portion in FIG. 4).

整流板２３−１は、排ガス１１の流れ方向から見て入口部２４の左側から流路中心に向かって延びて形成されており、排ガス１１の上半分を右向きに曲げるように設置されている。また、整流板２３−２は、排ガス１１の流れ方向から見て入口部２４の右側から中心に向かって、排ガス１１の下半分を左向きに曲げるように設置されている。   The rectifying plate 23-1 is formed so as to extend from the left side of the inlet portion 24 toward the flow path center when viewed from the flow direction of the exhaust gas 11, and is installed so that the upper half of the exhaust gas 11 is bent rightward. Further, the rectifying plate 23-2 is installed so that the lower half of the exhaust gas 11 is bent leftward from the right side of the inlet portion 24 toward the center when viewed from the flow direction of the exhaust gas 11.

煙道１３内の流路を流れる排ガス１１は、整流板２３−１、２３−２により煙道１９内の流路の上側を流れる排ガス１１Ａと、煙道１９内の流路の下側を流れる排ガス１１Ｂとに正反対の方向に分割される。   Exhaust gas 11 flowing through the flow path in the flue 13 flows through the upper side of the flow path in the flue 19 by the rectifying plates 23-1 and 23-2 and the lower side of the flow path in the flue 19. It is divided in the opposite direction to the exhaust gas 11B.

煙道１９の流路の上側を流れる排ガス１１Ａの大部分は、整流板２３−１により排ガス１１の流れ方向から見て右方向に向きを変えながら、ＣＯ2吸収塔１５の供給口２０からＣＯ2吸収塔１５の内壁に沿ってＣＯ2吸収塔１５の内部に流れる。また、排ガス１１Ａの一部は、整流板２３−１の下側をくぐり排ガス１１の流れ方向から見て左方向に流れる排ガス１１Ｂの流れに合流するものと、流路拡大連結部２１の壁面近傍に発生する剥離領域２５Ａに巻き込まれて、排ガス１１の流れ方向から見て右方向に下向きへ流れるものとになる。 Most of the exhaust gas 11A flowing on the upper side of the flow path of the flue 19 is changed from the supply port 20 of the CO 2 absorption tower 15 to the CO 2 while turning to the right as viewed from the flow direction of the exhaust gas 11 by the rectifying plate 23-1. 2 Flows along the inner wall of the absorption tower 15 into the CO 2 absorption tower 15. Further, a part of the exhaust gas 11A passes through the lower side of the rectifying plate 23-1 and merges with the flow of the exhaust gas 11B flowing in the left direction when viewed from the flow direction of the exhaust gas 11, and the vicinity of the wall surface of the flow path expanding connection portion 21 In the separation region 25 </ b> A generated at the bottom, the gas flows downward in the right direction when viewed from the flow direction of the exhaust gas 11.

煙道１９の流路の下側を流れる排ガス１１Ｂの大部分は、整流板２３−２により排ガス１１の流れ方向から見て左方向に向きを変えながら、ＣＯ2吸収塔１５の供給口２０からＣＯ2吸収塔１５の内壁に沿ってＣＯ2吸収塔１５の内部に流れる。また、排ガス１１Ｂの一部は、整流板２３−２の上側をくぐり排ガス１１の流れ方向から見て右方向に流れる排ガス１１Ａに合流するものと、流路拡大連結部２１の壁面近傍に発生する剥離領域２５Ｂに巻き込まれて、排ガス１１の流れ方向から見て左方向に上向きへ流れるものとになる。 Most of the exhaust gas 11B flowing under the flow path of the flue 19 is turned from the supply port 20 of the CO 2 absorption tower 15 while turning to the left as viewed from the flow direction of the exhaust gas 11 by the rectifying plate 23-2. flowing through the inside of the CO 2 absorber 15 along the inner wall of the CO 2 absorber 15. Further, a part of the exhaust gas 11B passes through the upper side of the rectifying plate 23-2 and joins with the exhaust gas 11A flowing in the right direction when viewed from the flow direction of the exhaust gas 11, and is generated in the vicinity of the wall surface of the flow path expanding connection portion 21. It is caught in the separation region 25B and flows upward in the left direction when viewed from the flow direction of the exhaust gas 11.

整流板２３−１により排ガス１１の流れ方向から見て右方向に流れた排ガス１１Ａの向きは、整流板２３−２により排ガス１１の流れ方向から見て左方向に流れた排ガス１１Ｂの向きと、ＣＯ2吸収塔１５の後側の内壁２６で正対する。排ガス１１Ａは整流板２３−１により煙道１９内の流路の上側を流れる排ガス１１のガス流れの向きを変えたものであり、排ガス１１Ｂは整流板２３−２により煙道１９内の流路の下側を流れる排ガス１１のガス流れの向きを変えたものである。よって、排ガス１１Ａと排ガス１１Ｂとはガス流れの高さが異なるため、排ガス１１Ａと排ガス１１Ｂとが正対する互いの境界面付近では強い速度せん断が発生するため、排ガス１１Ａと排ガス１１Ｂとは急激に混合され、排ガス１１Ａと排ガス１１Ｂとが混合された後の排ガス１１の流速は減速される。 The direction of the exhaust gas 11A that flows in the right direction when viewed from the flow direction of the exhaust gas 11 by the rectifying plate 23-1 is the direction of the exhaust gas 11B that flows in the left direction when viewed from the flow direction of the exhaust gas 11 by the rectifying plate 23-2. It faces directly on the inner wall 26 on the rear side of the CO 2 absorption tower 15. The exhaust gas 11A is obtained by changing the direction of the gas flow of the exhaust gas 11 flowing above the flow path in the flue 19 by the rectifying plate 23-1, and the exhaust gas 11B is flowed in the flue 19 by the rectifying plate 23-2. The direction of the gas flow of the exhaust gas 11 flowing below is changed. Therefore, since the exhaust gas 11A and the exhaust gas 11B have different gas flow heights, strong velocity shear is generated in the vicinity of the boundary surface where the exhaust gas 11A and the exhaust gas 11B face each other. The flow rate of the exhaust gas 11 after being mixed and the exhaust gas 11A and the exhaust gas 11B being mixed is decelerated.

この結果、図１１に示すような従来の整流装置１００を用いた場合、ＣＯ2吸収塔１０２内で局所的に発生する排ガス１０１の高流速を抑えることができ、排ガス１１Ａと排ガス１１Ｂとが混合した時の排ガス１１のガス流速を、減速することができ、例えば４ｍ/ｓ以下とすることができる。 As a result, when the conventional rectifier 100 as shown in FIG. 11 is used, the high flow rate of the exhaust gas 101 generated locally in the CO 2 absorption tower 102 can be suppressed, and the exhaust gas 11A and the exhaust gas 11B are mixed. The gas flow rate of the exhaust gas 11 can be reduced, for example, 4 m / s or less.

よって、整流板２３−１、２３−２によりＣＯ2吸収塔１５内に侵入する排ガス１１の上側の排ガス１１Ａと下側の排ガス１１Ｂとのガス流れの方向を逆方向とし、ＣＯ2吸収塔１５内で排ガス１１Ａと排ガス１１Ｂとを再び合流させることで、互いの流れの境界面で発生する強い速度せん断により、排ガス１１Ａと排ガス１１Ｂとを急激に混合し、排ガス１１Ａと排ガス１１Ｂとを混合した後の排ガス１１のガス流速を減速することができる。
このため、ＣＯ2吸収塔１５内に侵入する排ガス１１の流速が局所的に増大するのを抑制し、ＣＯ2吸収塔１５内に侵入する排ガス１１のガス流速の均一化を図ることができるので、排ガス１１がＣＯ2吸収液１４と接触する際に、排ガス１１中のＣＯ2をＣＯ2吸収液１４中に安定して吸収させることができる。 Therefore, the direction of the gas flow between the upper exhaust gas 11A and the lower exhaust gas 11B of the exhaust gas 11 entering the CO 2 absorption tower 15 by the rectifying plates 23-1 and 23-2 is reversed, and the CO 2 absorption tower 15 is reversed. By combining the exhaust gas 11A and the exhaust gas 11B again, the exhaust gas 11A and the exhaust gas 11B are rapidly mixed by the strong velocity shear generated at the boundary surface between the flows, and the exhaust gas 11A and the exhaust gas 11B are mixed. The gas flow rate of the later exhaust gas 11 can be reduced.
For this reason, the local increase in the flow rate of the exhaust gas 11 entering the CO 2 absorption tower 15 can be suppressed, and the gas flow rate of the exhaust gas 11 entering the CO 2 absorption tower 15 can be made uniform. can exhaust 11 when in contact with CO 2 absorbing liquid 14, so the CO 2 in the flue gas 11 is stably absorbed into the CO 2 absorbing liquid 14.

図１に示すように、ＣＯ2吸収塔１５において、排ガス１１はＣＯ2吸収塔１５の下部側に設けられたＣＯ2回収部２７において、例えばアルカノールアミンをベースとするＣＯ2吸収液１４と対向流接触し、排ガス１１中のＣＯ2は、下記式のように化学反応によりＣＯ2吸収液１４に吸収される。
Ｒ−ＮＨ2＋Ｈ2Ｏ＋ＣＯ2→Ｒ−ＮＨ3ＨＣＯ3・・・（１） As shown in FIG. 1, in the CO 2 absorption tower 15, the exhaust gas 11 is opposed to the CO 2 absorption liquid 14 based on, for example, an alkanolamine, in a CO 2 recovery section 27 provided on the lower side of the CO 2 absorption tower 15. The CO 2 in the exhaust gas 11 is absorbed by the CO 2 absorbent 14 by a chemical reaction as shown in the following formula.
R—NH 2 + H 2 O + CO 2 → R—NH 3 HCO 3 (1)

そしてＣＯ2除去後のＣＯ2除去排ガス３１Ａは水洗部３２を上昇し、水洗部３２の頂部から供給される水３３と気液接触して、ＣＯ2除去排ガス３１Ａに同伴するＣＯ2吸収液１４を水３３に回収する。その後、ＣＯ2吸収塔１５の頂部からＣＯ2吸収液１４の除去されたＣＯ2除去排ガス３１Ｂが排出される。また、水３３は水受部３４で回収され、循環して冷却水３５で冷却された後、水洗部３２の頂部側から水洗部３２に供給される。 The CO 2 CO 2 flue gas 31A after removal rises the water washing section 32, and gas-liquid contact with water 33 supplied from the top of the washing unit 32, CO 2 absorbing liquid 14 accompanying the CO 2 flue gas 31A Is recovered in water 33. Thereafter, the CO 2 removal exhaust gas 31B from which the CO 2 absorbent 14 has been removed is discharged from the top of the CO 2 absorption tower 15. Further, the water 33 is collected by the water receiving part 34, circulated and cooled by the cooling water 35, and then supplied from the top side of the water washing part 32 to the water washing part 32.

ＣＯ2吸収塔１５の塔底部に貯留されるリッチ溶液１６は、リッチソルベントポンプ３６により昇圧され、リッチ・リーン溶液熱交換器３７において、再生塔１７で再生されたＣＯ2吸収液１４により加熱され、再生塔１７に供給される。 The rich solution 16 stored at the bottom of the CO 2 absorption tower 15 is pressurized by a rich solvent pump 36 and heated by the CO 2 absorbent 14 regenerated in the regeneration tower 17 in a rich / lean solution heat exchanger 37. , Supplied to the regeneration tower 17.

再生塔１７の上部から再生塔１７内部に放出されたリッチ溶液１６は、吸熱により、大部分のＣＯ2を放出する。再生塔１７内で一部または大部分のＣＯ2を放出したＣＯ2吸収液１４は「セミリーン溶液」と呼称される。このセミリーン溶液は、再生塔１７の塔底部に至る頃には、ほぼ全てのＣＯ2が除去されたＣＯ2吸収液（リーン溶液）１４となる。リーン溶液１４は再生加熱器３８に送給される飽和スチーム３９と熱交換することで加熱される。再生加熱器３８で使用された飽和スチーム３９はスチーム凝縮水４０として排出される。 The rich solution 16 released from the upper part of the regeneration tower 17 into the regeneration tower 17 releases most of CO 2 by endotherm. The CO 2 absorbent 14 from which a part or most of CO 2 has been released in the regeneration tower 17 is referred to as a “semi-lean solution”. This semi-lean solution becomes a CO 2 absorbing solution (lean solution) 14 from which almost all CO 2 has been removed by the time it reaches the bottom of the regeneration tower 17. The lean solution 14 is heated by exchanging heat with the saturated steam 39 fed to the regeneration heater 38. Saturated steam 39 used in the regenerative heater 38 is discharged as steam condensed water 40.

一方、再生塔１７の塔頂部からは塔内においてリッチ溶液１６及び図示しないセミリーン溶液から水蒸気を伴ったＣＯ2ガス４１が放出される。そして、水蒸気を伴ったＣＯ2ガス４１が導出され、コンデンサ４２で冷却水４３により水蒸気が凝縮され、分離ドラム４４にて水が分離され、ＣＯ2ガス４５は系外に放出されて回収される。分離ドラム４４にて分離された水４６は凝縮水循環ポンプ４７にて再生塔１７の上部に供給される。 On the other hand, from the top of the regeneration tower 17, CO 2 gas 41 accompanied with water vapor is released from the rich solution 16 and a semi-lean solution (not shown) in the tower. Then, the CO 2 gas 41 accompanied with the water vapor is led out, the water vapor is condensed by the cooling water 43 by the condenser 42, the water is separated by the separation drum 44, and the CO 2 gas 45 is discharged outside the system and collected. . The water 46 separated by the separation drum 44 is supplied to the upper part of the regeneration tower 17 by a condensed water circulation pump 47.

再生塔１７の底部に貯留されるリーン溶液１４はＣＯ2吸収液として、リーンソルベントポンプ４８により送給され、リーンソルベントクーラ４９で冷却水５０と熱交換して冷却された後、ＣＯ2吸収塔１５に送給される。 The lean solution 14 stored at the bottom of the regeneration tower 17 is supplied as a CO 2 absorbing solution by a lean solvent pump 48 and is cooled by exchanging heat with the cooling water 50 in a lean solvent cooler 49, and then the CO 2 absorbing tower. 15 is sent.

このように、本実施の形態に係る整流装置２２Ａを備えたＣＯ2回収装置１０によれば、ＣＯ2吸収塔１５の入口近傍の流路拡大連結部２１に整流板２３−１、２３−２からなる整流装置２２Ａを設け、整流板２３−１、２３−２によりＣＯ2吸収塔１５内に侵入する排ガス１１のガス流れの方向を排ガス１１Ａ、１１Ｂで上下に分け、かつそのガス流れの向きを逆方向としてＣＯ2吸収塔１５内に送給している。ＣＯ2吸収塔１５内で排ガス１１Ａ、１１Ｂを正対して再び合流させることで、互いの流れの境界面で発生する強い速度せん断を利用することで、排ガス１１Ａと排ガス１１Ｂとを急激に混合し、排ガス１１のガス流速を減速することができ、ＣＯ2吸収塔１５内に侵入する排ガス１１のガス流速の均一化を図ることができる。このため、排ガス１１中のＣＯ2をＣＯ2吸収液１４中に安定して吸収することができる。 As described above, according to the CO 2 recovery device 10 including the rectifying device 22A according to the present embodiment, the rectifying plates 23-1 and 23-2 are connected to the flow channel expansion connection portion 21 in the vicinity of the inlet of the CO 2 absorption tower 15. The flow direction of the exhaust gas 11 entering the CO 2 absorption tower 15 by the rectifying plates 23-1 and 23-2 is divided into upper and lower exhaust gas 11A and 11B and the direction of the gas flow is provided. Is fed into the CO 2 absorption tower 15 in the reverse direction. The exhaust gas 11A and the exhaust gas 11B are rapidly mixed by using the strong velocity shear generated at the boundary surface of the flow by causing the exhaust gases 11A and 11B to face each other again in the CO 2 absorption tower 15 and to merge again. The gas flow rate of the exhaust gas 11 can be reduced, and the gas flow rate of the exhaust gas 11 entering the CO 2 absorption tower 15 can be made uniform. For this reason, CO 2 in the exhaust gas 11 can be stably absorbed into the CO 2 absorbent 14.

また、本実施の形態においては、２つの整流板２３−１、２３−２を設けているが、本発明はこれに限定されるものではなく、複数有するようにしてもよい。   Moreover, in this Embodiment, although the two baffle plates 23-1, 23-2 are provided, this invention is not limited to this, You may make it have multiple.

また、本実施の形態においては、整流板２３−１により、排ガス１１の流れ方向から見て排ガス１１の上半分を右方向に曲げるように設置され、整流板２３−２により、排ガス１１の流れ方向から見て排ガス１１の下半分を左方向に曲げるように設置されているが、本発明はこれに限定されるものではない。整流板２３−１は、排ガス１１の流れ方向から見て排ガス１１の上半分を左方向に曲げるように設置し、整流板２３−２は、排ガス１１の流れ方向から見て排ガス１１の下半分を右方向に曲げるように設置してもよい。   Moreover, in this Embodiment, it installs so that the upper half of the waste gas 11 may be bent rightward seeing from the flow direction of the exhaust gas 11 with the rectifying plate 23-1, and the flow of the exhaust gas 11 with the rectifying plate 23-2. Although it is installed so that the lower half of the exhaust gas 11 is bent leftward when viewed from the direction, the present invention is not limited to this. The rectifying plate 23-1 is installed so that the upper half of the exhaust gas 11 is bent leftward when viewed from the flow direction of the exhaust gas 11, and the rectifying plate 23-2 is the lower half of the exhaust gas 11 when viewed from the flow direction of the exhaust gas 11. May be installed to bend in the right direction.

また、本実施の形態においては、２つの整流板２３−１、２３−２をＣＯ2吸収塔１５の入口付近に設けているが、本発明はこれに限定されるものではなく、冷却塔１３の入口付近に設けるようにしてもよい。また、排ガスを処理する装置の入口付近に整流するために設けるようにしてもよい。 Further, in this embodiment, is provided with the two rectifying plates 23-1 and 23-2 in the vicinity of the inlet of the CO 2 absorber 15, the present invention is not limited to this, cooling towers 13 It may be provided in the vicinity of the entrance. Moreover, you may make it provide in order to rectify | straighten near the entrance of the apparatus which processes waste gas.

［第二の実施の形態］
本発明による第二の実施の形態に係る整流装置を備えたＣＯ2回収装置について、図面を参照して説明する。
本実施の形態においては、本実施の形態に係る整流装置を備えたＣＯ2回収装置の構成は、上述の図１に示すＣＯ2回収装置の構成と同様であるため、ＣＯ2回収装置の構成を示す図は省略し、整流装置の構成を示す図のみを用いて説明する。
なお、図１のＣＯ2回収装置と同一の部材には同一の符号を付してその説明は省略する。
図５は、本発明による第二の実施の形態に係る整流装置の構成を簡略に示す部分切掻き図であり、図６は、本発明による第二の実施の形態に係る整流装置の構成を簡略に示す平面図である。
図５、６に示すように、本発明による第二の実施の形態に係る整流装置２２Ｂは、整流板２３−１、２３−２に沿って所定間隔を有しつつ設けられる補助整流板５１−１、５１−２を有するものである。補助整流板５１−１は、整流板２３−１と同様に、排ガス１１の流れ方向から見て排ガス１１を右方向に曲げるように設置され、補助整流板５１−２は、整流板２３−２と同様に、排ガス１１の流れ方向から見て排ガス１１を左方向に曲げるように設置されている。 [Second Embodiment]
A CO 2 recovery device provided with a rectifier according to a second embodiment of the present invention will be described with reference to the drawings.
In the present embodiment, the configuration of the CO 2 recovery apparatus having a rectifier according to the present embodiment is the same as that of the CO 2 recovery apparatus shown in FIG. 1 described above, the configuration of the CO 2 recovery apparatus The figure which shows is omitted and it demonstrates using only the figure which shows the structure of a rectifier.
Incidentally, description thereof will be given the same reference numerals to the same members and the CO 2 recovery apparatus in FIG. 1 will be omitted.
FIG. 5 is a partial cutaway diagram schematically showing the configuration of the rectifier according to the second embodiment of the present invention, and FIG. 6 shows the configuration of the rectifier according to the second embodiment of the present invention. It is a top view shown simply.
As shown in FIGS. 5 and 6, the rectifying device 22B according to the second embodiment of the present invention is provided with an auxiliary rectifying plate 51- provided with a predetermined interval along the rectifying plates 23-1 and 23-2. 1, 51-2. Similarly to the rectifying plate 23-1, the auxiliary rectifying plate 51-1 is installed to bend the exhaust gas 11 in the right direction when viewed from the flow direction of the exhaust gas 11, and the auxiliary rectifying plate 51-2 is the rectifying plate 23-2. Similarly, the exhaust gas 11 is installed so as to bend leftward when viewed from the flow direction of the exhaust gas 11.

補助整流板５１−１、５１−２を設けることにより、流路拡大連結部２１に流れる排ガス１１は流路拡大連結部２１の壁面に沿って流れ易くなるため、排ガス１１のガス流れに剥離が生じるのを抑制でき、流路拡大連結部２１の入口部２４付近にガス滞留部が生じるのを抑制することができる。このため、整流板２３−１、２３−２、補助整流板５１−１、５１−２により排ガス１１Ａ、１１Ｂのガス流れの整流を促進することができると共に、排ガス１１Ａ、１１Ｂの速度を増大させることができる。   By providing the auxiliary rectifying plates 51-1 and 51-2, the exhaust gas 11 flowing through the flow passage expanding connection portion 21 can easily flow along the wall surface of the flow passage expanding connection portion 21. Generation | occurrence | production can be suppressed and it can suppress that a gas retention part arises in the entrance part 24 vicinity of the flow-path expansion connection part 21. Therefore, rectification of the gas flow of the exhaust gases 11A and 11B can be promoted by the rectifying plates 23-1 and 23-2 and the auxiliary rectifying plates 51-1 and 51-2, and the speed of the exhaust gases 11A and 11B is increased. be able to.

よって、排ガス１１Ａ、１１Ｂが正対した時の互いの流れの境界面で発生する速度せん断を更に大きくすることができるため、排ガス１１Ａと排ガス１１Ｂとの混合を更に促進することができると共に、排ガス１１Ａと排ガス１１Ｂとが混合した後の排ガス１１のガス流速の減速効果を更に大きくし、ＣＯ2吸収塔１５のＣＯ2回収部２７に送給される排ガス１１のガス流れを更に均一にすることができる。このため、排ガス１１中のＣＯ2をＣＯ2吸収液１４中に安定して吸収することができる。 Therefore, since the velocity shear generated at the boundary surface between the flow when the exhaust gases 11A and 11B face each other can be further increased, mixing of the exhaust gas 11A and the exhaust gas 11B can be further promoted, and the exhaust gas The effect of reducing the gas flow rate of the exhaust gas 11 after 11A and the exhaust gas 11B are mixed is further increased, and the gas flow of the exhaust gas 11 fed to the CO 2 recovery unit 27 of the CO 2 absorption tower 15 is made more uniform. Can do. For this reason, CO 2 in the exhaust gas 11 can be stably absorbed into the CO 2 absorbent 14.

また、本実施の形態においては、補助整流板５１−１は、整流板２３−１と同方向となるように設置し、補助整流板５１−２は、整流板２３−２と同方向となるように設置しているが、本発明はこれに限定されるものではなく、流路拡大連結部２１の側壁の開閉具合に応じて補助整流板５１−１、５１−２の設置する方向は調整するようにする。   Moreover, in this Embodiment, the auxiliary | assistant rectifier plate 51-1 is installed so that it may become the same direction as the rectifier plate 23-1, and the auxiliary | assistant rectifier plate 51-2 becomes the same direction as the rectifier plate 23-2. However, the present invention is not limited to this, and the direction in which the auxiliary rectifying plates 51-1 and 51-2 are installed is adjusted according to the opening / closing state of the side wall of the flow path expanding connection portion 21. To do.

また、本実施の形態においては、２つの補助整流板５１−１、５１−２を設けているが、本発明はこれに限定されるものではなく、複数有するようにしてもよい。   In the present embodiment, two auxiliary rectifying plates 51-1 and 51-2 are provided. However, the present invention is not limited to this, and a plurality of auxiliary rectifying plates 51-1 and 51-2 may be provided.

［第三の実施の形態］
本発明による第三の実施の形態に係る整流装置を備えたＣＯ2回収装置について、図面を参照して説明する。
本実施の形態においては、本実施の形態に係る整流装置を備えたＣＯ2回収装置の構成は、第二の実施の形態と同様、上述の図１に示すＣＯ2回収装置の構成と同様であるため、ＣＯ2回収装置の構成を示す図は省略し、整流装置の構成を示す図のみを用いて説明する。
なお、図１のＣＯ2回収装置と同一の部材には同一の符号を付してその説明は省略する。
図７は、本発明による第三の実施の形態に係る整流装置の構成を簡略に示す部分切掻き図であり、図８は、本発明による第三の実施の形態に係る整流装置の構成を簡略に示す平面図である。
尚、図８中、斜線部分が仕切り板の設置される部分を示す。
図７、８に示すように、本発明による第三の実施の形態に係る整流装置２２Ｃは、整流板２３−１、２３−２を連結する仕切り板５２を有するものである。仕切り板５２は、整流板２３−１の下側の辺２３ａと整流板２３−２の上側の辺２３ｂとを連結し、排ガス１１が流れる流路を高さ方向に二つの領域に分割している。 [Third embodiment]
A CO 2 recovery device including a rectifier according to a third embodiment of the present invention will be described with reference to the drawings.
In the present embodiment, the configuration of the CO 2 recovery device provided with the rectifier according to the present embodiment is the same as the configuration of the CO 2 recovery device shown in FIG. 1 described above, as in the second embodiment. Therefore, a diagram illustrating the configuration of the CO 2 recovery device is omitted, and only the diagram illustrating the configuration of the rectifying device will be described.
Incidentally, description thereof will be given the same reference numerals to the same members and the CO 2 recovery apparatus in FIG. 1 will be omitted.
FIG. 7 is a partial cutaway view schematically showing the configuration of the rectifier according to the third embodiment of the present invention, and FIG. 8 shows the configuration of the rectifier according to the third embodiment of the present invention. It is a top view shown simply.
In FIG. 8, the hatched portion indicates the portion where the partition plate is installed.
As shown in FIGS. 7 and 8, the rectifier 22C according to the third embodiment of the present invention includes a partition plate 52 that connects the rectifier plates 23-1 and 23-2. The partition plate 52 connects the lower side 23a of the current plate 23-1 and the upper side 23b of the current plate 23-2, and divides the flow path through which the exhaust gas 11 flows into two regions in the height direction. Yes.

整流板２３−１で排ガス１１の流れ方向から見て右方向に流れを変える排ガス１１Ａは整流板２３−１の下側の辺２３ａから排ガス１１の流れ方向から見て左方向に流出することはないため、整流板２３−１により排ガス１１Ａの全量を排ガス１１の流れ方向から見て右方向に曲げることができ、排ガス１１Ａの流速を増大させることができる。   The exhaust gas 11A that changes the flow in the right direction when viewed from the flow direction of the exhaust gas 11 at the rectifying plate 23-1 flows out in the left direction when viewed from the flow direction of the exhaust gas 11 from the lower side 23a of the rectification plate 23-1. Therefore, the entire amount of the exhaust gas 11A can be bent to the right as viewed from the flow direction of the exhaust gas 11 by the rectifying plate 23-1, and the flow rate of the exhaust gas 11A can be increased.

また、整流板２３−２で排ガス１１の流れ方向から見て左方向に向きを変える排ガス１１Ｂは整流板２３−２の上側の辺２３ｂから排ガス１１の流れ方向から見て右方向に流出することはないため、整流板２３−２により排ガス１１Ｂの全量を排ガス１１の流れ方向から見て左方向に曲げることができ、排ガス１１Ｂの流速を増大させることができる。   Further, the exhaust gas 11B, which turns to the left when viewed from the flow direction of the exhaust gas 11 at the rectifying plate 23-2, flows out to the right when viewed from the flow direction of the exhaust gas 11 from the upper side 23b of the rectification plate 23-2. Therefore, the entire amount of the exhaust gas 11B can be bent leftward when viewed from the flow direction of the exhaust gas 11 by the rectifying plate 23-2, and the flow rate of the exhaust gas 11B can be increased.

よって、排ガス１１Ａ、１１Ｂの全量を整流板２３−１、２３−２によりＣＯ2吸収塔１５内に送給することができるため、ＣＯ2吸収塔１５内に流れる排ガス１１Ａ、１１Ｂの速度を増大させることができる。このため、ＣＯ2吸収塔１５内で排ガス１１Ａ、１１Ｂが相対する際、排ガス１１Ａ、１１Ｂの速度せん断を更に大きくし、排ガス１１の混合効果を更に大きくすることができると共に、排ガス１１の速度の減速効果を更に大きくすることができる。この結果、排ガス１１中のＣＯ2をＣＯ2吸収液１４中に更に安定して吸収することができる。 Therefore, since the total amount of the exhaust gases 11A and 11B can be fed into the CO 2 absorption tower 15 by the rectifying plates 23-1 and 23-2, the speed of the exhaust gases 11A and 11B flowing in the CO 2 absorption tower 15 is increased. Can be made. For this reason, when the exhaust gases 11A and 11B face each other in the CO 2 absorption tower 15, the velocity shear of the exhaust gases 11A and 11B can be further increased, the mixing effect of the exhaust gas 11 can be further increased, and the speed of the exhaust gas 11 can be increased. The deceleration effect can be further increased. As a result, CO 2 in the exhaust gas 11 can be more stably absorbed into the CO 2 absorbent 14.

［第四の実施の形態］
本発明による第四の実施の形態に係る整流装置を備えたＣＯ2回収装置について、図面を参照して説明する。
本実施の形態においては、本実施の形態に係る整流装置を備えたＣＯ2回収装置の構成は、第二、第三の実施の形態と同様、上述の図１に示すＣＯ2回収装置の構成と同様であるため、ＣＯ2回収装置の構成を示す図は省略し、整流装置の構成を示す図のみを用いて説明する。
なお、図１のＣＯ2回収装置と同一の部材には同一の符号を付してその説明は省略する。
図９は、本発明による第四の実施の形態に係る整流装置の構成を簡略に示す部分切掻き図であり、図１０は、本発明による第四の実施の形態に係る整流装置の構成を簡略に示す図であり、図１０中、上側の図が平面図であり、図１０中、下側の図が側面図である。
図９、１０に示すように、本発明による第四の実施の形態に係る整流装置２２Ｄは、流路拡大連結部２１内の入口部２４の高さ方向に排ガス１１が異なる方向に向かうように排ガス１１の流れを変化させる整流板２３−１〜２３−４を有するものである。 [Fourth embodiment]
A CO 2 recovery device provided with a rectifier according to a fourth embodiment of the present invention will be described with reference to the drawings.
In the present embodiment, the configuration of the CO 2 recovery device including the rectifier according to the present embodiment is the same as the configuration of the CO 2 recovery device shown in FIG. 1 described above, as in the second and third embodiments. Therefore, the illustration of the configuration of the CO 2 recovery device is omitted, and only the diagram showing the configuration of the rectifying device will be described.
Incidentally, description thereof will be given the same reference numerals to the same members and the CO 2 recovery apparatus in FIG. 1 will be omitted.
FIG. 9 is a partial cutaway view schematically showing the configuration of the rectifier according to the fourth embodiment of the present invention, and FIG. 10 shows the configuration of the rectifier according to the fourth embodiment of the present invention. It is a figure shown simply, the upper figure is a top view in FIG. 10, and the lower figure is a side view in FIG.
As shown in FIGS. 9 and 10, the rectifying device 22D according to the fourth embodiment of the present invention is configured so that the exhaust gas 11 is directed in a different direction in the height direction of the inlet portion 24 in the flow path expanding connection portion 21. It has the baffle plates 23-1 to 23-4 which change the flow of the exhaust gas 11.

排ガス１１の流れ方向から見て流路拡大連結部２１の入口部２４の左右に整流板２３−１〜２３−４が互い違いに設けられている。具体的には、流路拡大連結部２１の入口部２４には排ガス１１の流れ方向から見て左側に整流板２３−１、２３−３が設けられ、排ガス１１の流れ方向から見て右側に整流板２３−２、２３−４が設けられている。   As viewed from the flow direction of the exhaust gas 11, rectifying plates 23-1 to 23-4 are alternately provided on the left and right of the inlet portion 24 of the flow path expansion connection portion 21. Specifically, rectifying plates 23-1 and 23-3 are provided on the left side when viewed from the flow direction of the exhaust gas 11 at the inlet portion 24 of the flow path expanding connection portion 21, and on the right side when viewed from the flow direction of the exhaust gas 11. Current plates 23-2 and 23-4 are provided.

流路拡大連結部２１の入口部２４には、上側から整流板２３−１、２３−２、２３−３、２３−４の順の高さで設置されている。また、整流板２３−１、２３−３が排ガス１１の流れ方向から見て入口部２４の左側から流路中心に向かって延びて形成されており、排ガス１１を右方向に曲げるように設置されている。整流板２３−２、２３−４が排ガス１１の流れ方向から見て入口部２４の流路右側から中心に向かって、排ガス１１を左方向に曲げるように設置されている。   At the inlet portion 24 of the flow path expansion connecting portion 21, the flow straightening plates 23-1, 23-2, 23-3, and 23-4 are installed in the order of height from the upper side. Further, the rectifying plates 23-1 and 23-3 are formed so as to extend from the left side of the inlet portion 24 toward the center of the flow path when viewed from the flow direction of the exhaust gas 11, and are installed so as to bend the exhaust gas 11 to the right. ing. The rectifying plates 23-2 and 23-4 are installed so as to bend the exhaust gas 11 leftward from the right side of the flow path of the inlet portion 24 toward the center when viewed from the flow direction of the exhaust gas 11.

排ガス１１Ａは整流板２３−１、２３−３により排ガス１１の流れ方向から見て右方向に流れ、流路拡大連結部２１の壁面近傍の剥離領域２５Ａに生じる乱れに巻き込まれることで排ガス１１Ａの流速を減速することができる。そのため、排ガス１１Ａは減速された状態でＣＯ2吸収塔１５内に送給することができる。 The exhaust gas 11A flows in the right direction when viewed from the flow direction of the exhaust gas 11 by the rectifying plates 23-1, 23-3, and is caught in the turbulence generated in the separation region 25A in the vicinity of the wall surface of the flow path expanding connection portion 21. The flow rate can be reduced. Therefore, the exhaust gas 11A can be fed into the CO 2 absorption tower 15 in a decelerated state.

また、排ガス１１Ｂは整流板２３−２、２３−４により排ガス１１の流れ方向から見て左方向に流れ、流路拡大連結部２１の壁面近傍の剥離領域２５Ｂで生じる乱れに巻き込まれることで排ガス１１Ｂの流速を減速することができる。そのため、排ガス１１Ｂは減速された状態でＣＯ2吸収塔１５内に送給することができる。 Further, the exhaust gas 11B flows to the left as viewed from the flow direction of the exhaust gas 11 by the rectifying plates 23-2 and 23-4, and is exhausted by being caught in the turbulence generated in the separation region 25B in the vicinity of the wall surface of the flow path expanding connection portion 21. The flow rate of 11B can be reduced. Therefore, the exhaust gas 11B can be fed into the CO 2 absorption tower 15 in a decelerated state.

よって、整流板２３−１〜２３−４によりガス流れ方向を変えた排ガス１１Ａ、１１Ｂは、流路拡大連結部２１の壁面近傍に生じる剥離領域２５Ａ、２５Ｂで生じる乱れに巻き込まれることで、排ガス１１Ａ、１１Ｂの減速効果が大きくなる。このため、整流板２３−１〜２３−４により左右に分かれた排ガス１１Ａ、１１ＢがＣＯ2吸収塔１５内で相対する際の排ガス１１Ａ、１１Ｂの速度せん断を小さくし、排ガス１１の混合効果を小さくすることができると共に、排ガス１１の速度の減速効果を小さくすることができる。 Therefore, the exhaust gases 11A and 11B whose gas flow directions have been changed by the rectifying plates 23-1 to 23-4 are involved in the turbulence generated in the separation regions 25A and 25B generated in the vicinity of the wall surface of the flow path expanding connection portion 21, thereby the exhaust gas. The deceleration effect of 11A and 11B is increased. For this reason, the exhaust gas 11A, 11B divided into the left and right by the rectifying plates 23-1 to 23-4 is reduced in the velocity shear of the exhaust gas 11A, 11B when facing the CO 2 absorption tower 15, and the mixing effect of the exhaust gas 11 is reduced. While being able to make it small, the speed reduction effect of the speed of the exhaust gas 11 can be made small.

従って、本実施の形態に係る整流装置２２Ｄによれば、図３に示す第一の実施の形態に係る整流装置２２Ａを用いる場合に比べて排ガス１１の流速を減速させた状態でＣＯ2吸収塔１５内に侵入させることができ、排ガス１１中のＣＯ2をＣＯ2吸収液１４中に更に安定して吸収することができる。 Therefore, according to the rectifier 22D according to the present embodiment, the CO 2 absorption tower in a state where the flow rate of the exhaust gas 11 is reduced as compared with the case where the rectifier 22A according to the first embodiment shown in FIG. 3 is used. 15, CO 2 in the exhaust gas 11 can be more stably absorbed into the CO 2 absorbent 14.

以上のように、本発明にかかる整流装置は、ＣＯ2吸収塔に送給する排ガスの流速を緩和する整流装置として用いるのに適している。 As described above, the rectifier according to the present invention is suitable for use as a rectifier that relaxes the flow rate of the exhaust gas supplied to the CO 2 absorption tower.

１０ ＣＯ2回収装置
１１ 排ガス
１２、３３、４６ 水
１３ 冷却塔
１４ ＣＯ2吸収液
１５ ＣＯ2吸収塔
１６ リッチ溶液
１７ 再生塔
１８、３５、４３、５０ 冷却水
１９ 煙道
２０ 供給口
２１ 流路拡大連結部
２２Ａ〜２２Ｄ 整流装置
２３−１〜２３−４ 整流板
２４ 入口部
２５Ａ、２５Ｂ 剥離領域
２６ 内壁
２７ ＣＯ2回収部
３１Ａ、３１Ｂ ＣＯ2除去排ガス
３２ 水洗部
３４ 水受部
３６ リッチソルベントポンプ
３７ リッチ・リーン溶液熱交換器
３８ 再生加熱器
３９ 飽和スチーム
４０ スチーム凝縮水
４１ ＣＯ2ガス
４２ コンデンサ
４４ 分離ドラム
４５ ＣＯ2ガス
４７ 凝縮水循環ポンプ
４８ リーンソルベントポンプ
４９ リーンソルベントクーラ
５１−１、５１−２ 補助整流板
５２ 仕切り板 10 CO 2 recovery device 11 the exhaust gas 12,33,46 water 13 cooling tower 14 CO 2 absorbing liquid 15 CO 2 absorption tower 16 rich solution 17 regenerator 18,35,43,50 coolant 19 flue 20 supply port 21 flow path enlarged coupling portion 22A~22D rectifier device 23-1 to 23-4 rectifying plates 24 inlet portion 25A, 25B peeled area 26 the inner wall 27 CO 2 recovery unit 31A, 31B CO 2 removal flue gas 32 washing section 34 the water receiving portion 36 rich solvent pump 37 Rich Lean Solution Heat Exchanger 38 Regenerative Heater 39 Saturated Steam 40 Steam Condensate 41 CO 2 Gas 42 Condenser 44 Separation Drum 45 CO 2 Gas 47 Condensed Water Circulation Pump 48 Lean Solvent Pump 49 Lean Solvent Cooler 51-1, 51- 2 Auxiliary current plate 52 Partition plate

Claims (5)

ＣＯ２を含有する排ガスとＣＯ２吸収液とを接触させて前記排ガス中のＣＯ２を除去するＣＯ２吸収塔に前記排ガスを送給する煙道の前記ＣＯ２吸収塔の入口付近に、前記排ガスと前記ＣＯ２吸収液とが接触するに領域に前記排ガスの流速を緩和する流速緩和部材が設けられ、前記流速緩和部材が、前記煙道と前記ＣＯ ２ 吸収塔との間に前記排ガスを水平方向に前記ＣＯ ２ 吸収塔に漸次拡大するように通過させる流路拡大連結部内に二つ以上設けられ、前記流路拡大連結部の高さ方向に前記排ガスが異なる方向に向かうように前記排ガスの流れを変化させることを特徴とする整流装置。 CO 2 in the inlet near the CO 2 absorption tower of the exhaust gas and CO 2 absorbing solution and is contacted feeding the exhaust gas to the CO 2 absorber to remove CO 2 in the flue gas Kyusuru flue containing the flow rate reducing member is provided to relieve the flow rate of the previous SL gas to the region to contact with the an exhaust gas CO 2 absorbing solution, wherein the flow velocity reducing member is the exhaust gas between the flue and the CO 2 absorption tower Two or more in the flow channel expansion connecting portion that passes through the CO 2 absorption tower so as to gradually expand in the horizontal direction, and the exhaust gas is directed in different directions in the height direction of the flow channel expansion connecting portion. A rectifier that changes the flow of exhaust gas . 請求項１において、
前記流速緩和部材が、前記煙道の中心軸のガス流れ方向に向かって前記流路拡大連結部の入口部から延設されることを特徴とする整流装置。 In claim 1 ,
The flow rate reducing member extends from an inlet portion of the flow passage expanding connection portion in a gas flow direction of a central axis of the flue. 請求項１又は２において、
前記流速緩和部材に沿って設けられる補助整流板を複数有することを特徴とする整流装置。 In claim 1 or 2 ,
A rectifier having a plurality of auxiliary rectifier plates provided along the flow velocity reducing member. 請求項１乃至３の何れか一つにおいて、
二つの流速緩和部材が設けられ、二つの流速緩和部材を連結する仕切り板を有することを特徴とする整流装置。 In any one of Claims 1 thru | or 3 ,
Two flow velocity reduction members are provided, and it has a partition plate which connects two flow velocity relaxation members, The rectifier characterized by the above-mentioned. ＣＯ２を含有する排ガスを冷却水によって冷却する冷却塔と、
請求項１乃至４の何れか一つの整流装置と、
冷却された排ガスとＣＯ２を吸収するＣＯ２吸収液とを接触させて排ガスからＣＯ２を除去するＣＯ２吸収塔と、
ＣＯ２を吸収したＣＯ２吸収液からＣＯ２を放出させてＣＯ２吸収液を再生する再生塔と、
を有することを特徴とするＣＯ２回収装置。 A cooling tower for cooling the exhaust gas containing CO 2 with cooling water;
A rectifier according to any one of claims 1 to 4 ,
And the CO 2 absorber to remove CO 2 from flue gas by contacting the CO 2 absorbing solution for absorbing the cooled exhaust gas and CO 2,
A regenerator to regenerate the CO 2 absorbing liquid CO 2 from the absorbed CO 2 absorbing solution by releasing CO 2,
A CO 2 recovery device comprising:
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