JP5199585B2 - Flue gas desulfurization equipment - Google Patents

Flue gas desulfurization equipment Download PDF

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JP5199585B2
JP5199585B2 JP2007040459A JP2007040459A JP5199585B2 JP 5199585 B2 JP5199585 B2 JP 5199585B2 JP 2007040459 A JP2007040459 A JP 2007040459A JP 2007040459 A JP2007040459 A JP 2007040459A JP 5199585 B2 JP5199585 B2 JP 5199585B2
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seawater
desulfurization
dilution
water channel
mixing
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JP2008200621A (en
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圭介 園田
章造 永尾
泰生 住吉
裕次 黒田
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Mitsubishi Heavy Industries Ltd
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Priority to PCT/JP2008/052898 priority patent/WO2008102824A1/en
Priority to SG2012009213A priority patent/SG178769A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/43197—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor characterised by the mounting of the baffles or obstructions
    • B01F25/431971—Mounted on the wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Physical Water Treatments (AREA)

Description

本発明は、石炭焚き、原油焚き及び重油焚き等の発電プラントに適用される排煙脱硫装置に係り、特に、海水法を用いて脱硫する排煙脱硫装置に関する。   The present invention relates to a flue gas desulfurization apparatus applied to power plants such as coal burning, crude oil burning, and heavy oil burning, and more particularly to a flue gas desulfurization apparatus that performs desulfurization using a seawater method.

従来、石炭や原油等を燃料とする発電プラントにおいて、ボイラから排出される燃焼排気ガス（以下、「ボイラ排ガス」と呼ぶ）は、ボイラ排ガス中に含まれている二酸化硫黄（ＳＯ２
）等の硫黄酸化物（ＳＯｘ）を除去してから大気に放出される。このような脱硫処理を施す排煙脱硫装置の脱硫方式としては、石灰石石膏法、スプレードライヤー法及び海水法が知られている。 Conventionally, in a power plant using coal or crude oil as fuel, combustion exhaust gas (hereinafter referred to as “boiler exhaust gas”) discharged from a boiler is sulfur dioxide (SO 2 ) contained in the boiler exhaust gas.
) And other sulfur oxides (SOx) are removed and then released into the atmosphere. As a desulfurization method of the flue gas desulfurization apparatus that performs such a desulfurization treatment, a limestone gypsum method, a spray dryer method, and a seawater method are known.

このうち、海水法を採用した排煙脱硫装置（以下、「海水脱硫装置」と呼ぶ）は、吸収剤として海水を使用する脱硫方式である。この方式では、たとえば略円筒のような筒形状を縦置きにした脱硫塔（吸収塔）の内部に海水及びボイラ排ガスを供給することにより、海水を吸収液として湿式ベースの気液接触を生じさせて硫黄酸化物を除去している。
上述した海水脱硫装置においては、通常の場合、脱硫塔内で吸収剤として使用した後の使用済海水が水路（Sea Water Treatment System；ＳＷＴＳ）を流れて周辺海域に排水される。なお、水路内を流れる使用済海水に対しては、たとえば脱炭酸（爆気）等の処理が施されている。 Among these, the flue gas desulfurization apparatus (hereinafter referred to as “seawater desulfurization apparatus”) employing the seawater method is a desulfurization system that uses seawater as an absorbent. In this system, for example, by supplying seawater and boiler exhaust gas into a desulfurization tower (absorption tower) having a cylindrical shape such as a substantially cylindrical shape, a wet-based gas-liquid contact is generated using seawater as an absorption liquid. To remove sulfur oxides.
In the seawater desulfurization apparatus described above, usually, used seawater after being used as an absorbent in the desulfurization tower flows through a water channel (Sea Water Treatment System; SWTS) and is discharged into the surrounding sea area. For example, decarbonation (explosion) is performed on the used seawater flowing in the water channel.

ここで、従来の海水脱硫装置について、その一例を図４に示して簡単に説明する。
図示の海水脱硫装置１は、一方の海水が脱硫塔２の上部から供給されて自然落下し、脱硫塔２の下部から供給されて上昇するボイラ排ガスとの間で気液接触を生じさせている。海水とボイラ排ガスとの気液接触は、脱硫塔２内の上下方向に所定の間隔で複数段配置された多孔板棚３を湿式ベースとし、多孔板棚３に穿設されている多数の孔４を海水及びボイラ排ガスが通過することにより達成される。
なお、図中の符号５は海水供給管、６は脱硫後の海水を流出させる使用済海水出口、７はボイラ排ガス供給口、８は脱硫後のボイラ排ガスを流出させるボイラ排ガス排気口である。（たとえば、特許文献１、２参照） Here, an example of a conventional seawater desulfurization apparatus will be briefly described with reference to FIG.
In the illustrated seawater desulfurization apparatus 1, one seawater is supplied from the upper part of the desulfurization tower 2 and naturally falls, and gas-liquid contact is generated between the boiler exhaust gas supplied from the lower part of the desulfurization tower 2 and rising. . The gas-liquid contact between the seawater and the boiler exhaust gas is based on the perforated plate shelf 3 arranged in a plurality of stages at predetermined intervals in the vertical direction in the desulfurization tower 2, and a large number of holes formed in the perforated plate shelf 3. 4 is achieved by passage of seawater and boiler exhaust gas.
In the figure, reference numeral 5 denotes a seawater supply pipe, 6 denotes a used seawater outlet through which the desulfurized seawater flows out, 7 denotes a boiler exhaust gas supply port, and 8 denotes a boiler exhaust gas exhaust port through which the boiler exhaust gas after desulfurization flows out. (For example, see Patent Documents 1 and 2)

このような海水脱硫装置１においては、脱硫塔２を水路（ＳＷＴＳ）９の上方に配置することにより、脱硫後の使用済海水を脱硫塔２の下端に開口する使用済海水出口６から水路９内に直接落下させて排水する場合がある。すなわち、水路９内を流れている希釈用海水と、脱硫塔２から落下して合流する使用済海水とを混合することにより、使用済海水を希釈して排水する構成とされる。
また、使用済海水を流す水路９には、脱硫塔２からボイラ排ガスが流入するのを防止するため、水中に入り込む位置まで延びたガス封印用の仕切壁１０が設けられている。このため、脱硫塔２に供給されたボイラ排ガスは、仕切壁１０と水面とにより封印されるため、水路９の水面上に形成される空間に漏出することはない。
特開平１１−２９０６４３号公報 特開２００１−１２９３５２号公報 In such a seawater desulfurization apparatus 1, the desulfurization tower 2 is arranged above the water channel (SWTS) 9, whereby the desulfurized used seawater is opened from the used seawater outlet 6 at the lower end of the desulfurization tower 2 to the water channel 9. There are cases where it is dropped directly into the drain. That is, the seawater for dilution flowing in the water channel 9 and the used seawater that falls from the desulfurization tower 2 and joins are mixed to dilute and drain the used seawater.
Moreover, in order to prevent the boiler exhaust gas from flowing from the desulfurization tower 2 into the water channel 9 through which the used seawater flows, a partition wall 10 for gas sealing that extends to a position where it enters the water is provided. For this reason, since the boiler exhaust gas supplied to the desulfurization tower 2 is sealed by the partition wall 10 and the water surface, it does not leak into the space formed on the water surface of the water channel 9.
Japanese Patent Laid-Open No. 11-290643 JP 2001-129352 A

ところで、上述した海水脱硫装置１においては、水路９内を流れる使用済海水に対し、周辺海域に排水する前にエアレーションによる脱炭酸処理が行われている。この脱炭酸処理においては、希釈用の海水と使用済海水との混合が十分になされていないと、脱炭酸性能が低下するという問題がある。すなわち、希釈用海水による使用済海水の混合・希釈が不完全で濃度にムラを生じれば、使用済希釈海水が水路９を流れて排水されるまでの間になされる脱炭酸処理の性能が低下するため好ましくない。特に、水路９を流れる希釈用海水は、脱硫塔２の直下となる水面近傍（図４に示す領域Ａ）において、ガス封印用に設けた仕切壁１０の影響を受けて流れが淀みやすいため、使用済希釈海水の混合不良を生じやすい。
本発明は、上記の事情に鑑みてなされたものであり、その目的とするところは、海水法を用いた排煙脱硫装置において、使用済海水と希釈用海水との混合・希釈を促進することにより、使用済希釈海水を脱炭酸処理する際に脱炭酸性能が低下するのを防止または抑制することにある。 By the way, in the seawater desulfurization apparatus 1 mentioned above, the decarboxylation process by aeration is performed with respect to the used seawater which flows in the waterway 9, before draining to a surrounding sea area. In this decarboxylation treatment, there is a problem that the decarboxylation performance is deteriorated unless the seawater for dilution and the used seawater are sufficiently mixed. That is, if mixing and dilution of the used seawater with the dilution seawater is incomplete and the concentration becomes uneven, the performance of the decarboxylation process that is performed before the used diluted seawater flows through the water channel 9 and is drained. Since it falls, it is not preferable. In particular, the dilution seawater flowing through the water channel 9 tends to stagnate under the influence of the partition wall 10 provided for gas sealing in the vicinity of the water surface immediately below the desulfurization tower 2 (region A shown in FIG. 4). Prone to mixing failure of used diluted seawater.
The present invention has been made in view of the above circumstances, and the object of the present invention is to promote mixing and dilution of used seawater and dilution seawater in a flue gas desulfurization apparatus using the seawater method. Therefore, it is in preventing or suppressing that a decarboxylation performance falls, when decarboxylating a used diluted seawater.

本発明は、上記の課題を解決するため、下記の手段を採用した。
本発明の排煙脱硫装置は、水路と、内部において前記水路内を流れる希釈用海水の表面に脱硫後の使用済海水を直接落下させる脱硫塔と、前記希釈海水との混合により希釈された使用済希釈海水が前記水路を流れる間に脱炭酸処理される脱炭酸処理部と、を備えた排煙脱硫装置であって、前記脱炭酸処理部の上流側において、予め前記希釈用海水に乱流を発生させ、前記使用済海水と前記希釈用海水とを撹拌することにより、これらの混合を促進する混合促進手段を備えたことを特徴とするものである。 In order to solve the above problems, the present invention employs the following means.
The flue gas desulfurization apparatus of the present invention is a diluted use by mixing the water channel, a desulfurization tower that directly drops the used sea water after desulfurization onto the surface of the dilution sea water flowing inside the water channel, and the diluted sea water A flue gas desulfurization device comprising a decarbonation treatment unit that decarboxylates while the diluted diluted seawater flows through the water channel, and turbulently flows into the dilution seawater in advance on the upstream side of the decarbonation treatment unit. And mixing promotion means for accelerating the mixing of the used seawater and the diluting seawater .

このような排煙脱硫装置によれば、脱炭酸処理部の上流側において、予め希釈用海水に乱流を発生させ、使用済海水と希釈用海水とを撹拌することにより、これらの混合を促進する混合促進手段を備えているので、使用済海水と希釈用海水との混合不良を解消して混合・希釈が促進される。
この場合、好適な混合促進手段としては、海水の流れを乱すスタティックミキサー等の乱れ発生装置、水路底面から微細気泡を発生させるエアレーションノズル、あるいは、乱れ発生装置及びエアレーションノズルの組み合わせ等がある。 According to such a flue gas desulfurization apparatus, turbulent flow is generated in the dilution seawater in advance on the upstream side of the decarbonation treatment section, and the mixing of these is promoted by stirring the used seawater and the dilution seawater. is provided with the mixing acceleration means for mixing, diluting to eliminate the bad mixing of the diluent seawater used seawater is accelerated.
In this case, suitable mixing promoting means include a turbulence generator such as a static mixer that disturbs the flow of seawater, an aeration nozzle that generates fine bubbles from the bottom of the water channel, or a combination of the turbulence generator and the aeration nozzle.

上述した本発明によれば、水路内に使用済海水と希釈用海水との混合を促進する混合促進手段を設けることにより、混合・希釈の促進により使用済海水と希釈用海水との混合不良が解消されるので、水路内を流れる間に行われる使用済希釈海水の脱炭酸処理性能が向上するという顕著な効果が得られる。   According to the present invention described above, by providing a mixing promoting means for promoting the mixing of the used seawater and the dilution seawater in the water channel, mixing failure between the used seawater and the dilution seawater is promoted by promoting the mixing / dilution. Since it eliminates, the remarkable effect that the decarboxylation processing performance of the used diluted seawater performed while flowing in a waterway improves is acquired.

以下、本発明に係る排煙脱硫装置の一実施形態を図面に基づいて説明する。
図１に示す第１の実施形態には、吸収剤として海水を使用する海水法と呼ばれる脱硫方式を採用した排煙脱硫装置（以下、「海水脱硫装置」と呼ぶ）１が示されている。
この海水脱硫装置１は、略円筒形状とした脱硫塔２にボイラ排ガス及び海水を供給することにより、吸収液として上方から自然落下する海水と、下方から上昇するボイラ排ガスとが、湿式ベースとなる多孔板棚３で気液接触して脱硫される。 Hereinafter, an embodiment of a flue gas desulfurization apparatus according to the present invention will be described with reference to the drawings.
The first embodiment shown in FIG. 1 shows a flue gas desulfurization apparatus (hereinafter referred to as “seawater desulfurization apparatus”) 1 that employs a desulfurization method called seawater method using seawater as an absorbent.
In this seawater desulfurization apparatus 1, by supplying boiler exhaust gas and seawater to a substantially cylindrical desulfurization tower 2, seawater that naturally falls from above as an absorbing liquid and boiler exhaust gas that rises from below serve as a wet base. It is desulfurized by gas-liquid contact with the perforated plate shelf 3.

脱硫塔２の内部には、複数段（図示の例では３段）の多孔板棚３が上下方向に間隔を設けて水平に配置されている。各多孔板棚３には、ボイラ排ガス及び海水の通路となる多数の孔４が穿設されている。
吸収剤となる海水は、海水供給管５を介して吸収塔２の上部まで導入される。この海水は、吸収塔２内の上部平面に略均等配置された多数の海水ノズル５ａから、下方に配置されている多孔板棚３へ向けて流出する。なお、脱硫塔２の底面部には、多孔板棚３を通過した脱硫後の使用済海水を、後述する水路（Sea Water Treatment System；ＳＷＴＳ）９の水面に直接落下させる使用済海水出口６が開口している。 Inside the desulfurization tower 2, a plurality of (three in the illustrated example) perforated plate shelves 3 are horizontally arranged with an interval in the vertical direction. Each perforated plate shelf 3 is provided with a number of holes 4 serving as a passage for boiler exhaust gas and seawater.
Seawater as an absorbent is introduced to the upper part of the absorption tower 2 through the seawater supply pipe 5. This seawater flows out from a large number of seawater nozzles 5 a arranged substantially evenly on the upper plane in the absorption tower 2 toward the perforated plate shelf 3 arranged below. In addition, a used seawater outlet 6 is provided at the bottom of the desulfurization tower 2 to allow the used seawater after desulfurization that has passed through the perforated plate shelf 3 to fall directly on the water surface of a water channel (Sea Water Treatment System; SWTS) 9 described later. It is open.

一方、ボイラ排ガスは、多孔板棚３より下方に連通するボイラ排ガス供給口７から脱硫塔２の内部へ供給され、多孔板棚３を通過して脱硫塔２の上部に開口するボイラ排ガス排気口８から流出する。
すなわち、上方から自然落下する海水と下方から上昇するボイラ排ガスとが、各段の多孔板棚３に穿設された孔４を通過する際に気液接触し、ボイラ排ガス中の硫黄酸化物を海水が吸収することにより脱硫される。 On the other hand, the boiler exhaust gas is supplied to the inside of the desulfurization tower 2 from the boiler exhaust gas supply port 7 communicating below the perforated plate shelf 3, passes through the perforated plate shelf 3 and opens to the upper part of the desulfurization tower 2. Escape from 8.
That is, when the seawater that naturally falls from above and the boiler exhaust gas that rises from below pass through the holes 4 formed in the perforated plate shelves 3 of each stage, they come into gas-liquid contact, and the sulfur oxide in the boiler exhaust gas is removed. It is desulfurized by absorbing seawater.

上述した脱硫塔２は、希釈用海水を導入して流す水路９の上部開口に使用済海水出口６を連通させて配置される。この水路９は、希釈用海水を導入して流すとともに、脱硫塔２の使用済海水出口６から落下して合流する使用済海水を希釈し、さらに、希釈後の使用済希釈海水に脱炭酸処理を施して排水する流路であり、通常は暗渠が採用される。希釈用海水と使用済海水とが合流して混合された使用済希釈海水は、水路９に導かれて周辺海域に排水されるが、水路９を流れる途中でエアレーションによる脱炭酸処理が施される。
また、水路９に脱硫塔２を設置する開口部の下方には、希釈用海水等が流れる水面より低い位置まで、すなわち、海水の水中に入り込む位置まで、ガス封印用の仕切壁１０が設けられている。この仕切壁１０は、使用済海水出口６の開口部外周を取り囲むようにして形成されているので、ボイラ排ガス供給口７から脱硫塔２に供給されるボイラ排ガスは、仕切壁１０と水面とにより封印されて水路９の水面上に形成される空間に流入することが防止されている。 The desulfurization tower 2 described above is arranged with a used seawater outlet 6 in communication with an upper opening of a water channel 9 that introduces and flows dilution seawater. This water channel 9 introduces and flows dilution seawater, dilutes the used seawater that falls from the used seawater outlet 6 of the desulfurization tower 2 and joins, and further decarboxylates the diluted used seawater. It is a channel that drains by applying, and usually a culvert is adopted. The used diluted seawater in which the dilution seawater and the used seawater are mixed and mixed is guided to the water channel 9 and drained to the surrounding sea area, but is decarboxylated by aeration in the middle of flowing through the water channel 9. .
Further, below the opening where the desulfurization tower 2 is installed in the water channel 9, a partition wall 10 for gas sealing is provided up to a position lower than the surface of the water through which the dilution seawater flows, that is, a position where the seawater enters the water. ing. Since this partition wall 10 is formed so as to surround the outer periphery of the opening of the used seawater outlet 6, the boiler exhaust gas supplied from the boiler exhaust gas supply port 7 to the desulfurization tower 2 is divided by the partition wall 10 and the water surface. It is prevented from flowing into a space that is sealed and formed on the water surface of the water channel 9.

ところで、水路９の内部には、使用済海水と希釈用海水との混合を促進する混合促進手段として、希釈用海水の流れを乱す乱れ発生器２０が設けられている。
図１に示す乱れ発生器２０は、水路９内を流れる希釈用海水の流れ方向において、脱硫塔２の設置位置より上流側に設けられている。この乱れ発生器２０は、たとえばスタティックミキサーのように、希釈用海水の流れを撹拌するなどして渦のような乱れを形成するものが有効である。しかし、乱れ発生器２０は、上述したスタティックミキサーに限定されることはなく、たとえば仕切壁１０の下方に配置して希釈用海水を通す板状や籠状の網部材を採用してもよい。なお、乱れ発生器２０の設置位置は、脱炭酸処理を受ける使用済希釈海水が十分に混合されていればよいので、水路９内で脱炭酸処理を行う位置より上流側となり、好ましくは脱硫塔２の近傍位置であればよい。 By the way, a turbulence generator 20 that disturbs the flow of the dilution seawater is provided inside the water channel 9 as a mixing promoting means for promoting the mixing of the used seawater and the dilution seawater.
The turbulence generator 20 shown in FIG. 1 is provided upstream of the installation position of the desulfurization tower 2 in the flow direction of the dilution seawater flowing through the water channel 9. As the turbulence generator 20, a vortex-like turbulence is effective by stirring the flow of the dilution seawater, such as a static mixer. However, the turbulence generator 20 is not limited to the static mixer described above. For example, a plate-like or trough-like net member that is disposed below the partition wall 10 and allows the dilution seawater to pass therethrough may be employed. The installed position of the turbulence generator 20 is sufficient if the used diluted seawater subjected to the decarbonation treatment is sufficiently mixed, and therefore is located upstream from the position where the decarbonation treatment is performed in the water channel 9, and preferably the desulfurization tower. Any position in the vicinity of 2 may be used.

このような乱れ装置２０を設置することにより、水路９を通って脱硫塔２の下方に導かれた希釈用海水には、乱れ発生器２０の作用により図中に矢印ａで示す渦等の乱れが生じている。このため、脱硫塔２の使用済海水出口６から落下して希釈用海水の流れに合流する使用済海水は、渦等の乱れにより撹拌されて混合が促進される。
従って、水路９を流れる使用済希釈海水は十分に撹拌・混合され、使用済海水の濃度が略均一化した状態で流れてエアレーションによる脱炭酸処理を受けることとなるので、水路（ＳＷＴＳ）９の脱炭酸性能が向上する。 By installing such a turbulence device 20, turbulence such as a vortex indicated by an arrow a in the figure is caused in the dilution seawater led to the lower side of the desulfurization tower 2 through the water channel 9 by the action of the turbulence generator 20. Has occurred. For this reason, the used seawater which falls from the used seawater outlet 6 of the desulfurization tower 2 and merges with the flow of the dilution seawater is agitated by turbulence such as vortices and mixing is promoted.
Therefore, the used diluted seawater flowing through the water channel 9 is sufficiently agitated and mixed, and flows in a state where the concentration of the used seawater is substantially uniform and is subjected to decarboxylation treatment by aeration. Decarboxylation performance is improved.

続いて、本発明の第２の実施形態を図２に示して説明する。なお、上述した第１の実施形態と同様の部分には同じ符号を付し、その詳細な説明は省略する。
この実施形態では、使用済海水と希釈用海水との混合を促進する混合促進手段が異なっており、上述した乱れ発生器２０に代えて、水路９の底面に微細気泡ｂを発生させるエアレーションノズル３０が設置されている。図示の例では、エアレーションノズル３０が脱硫塔２の下方に配置され、使用済海水出口６から流下した使用済海水が希釈用海水と合流する領域に微細気泡ｂを発生させている。
従って、水路９を流れる使用済希釈海水は十分に撹拌・混合され、使用済海水の濃度が略均一化した状態で流れてエアレーションによる脱炭酸処理を受けることとなるので、水路（ＳＷＴＳ）９の脱炭酸性能が向上する。 Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment mentioned above, and the detailed description is abbreviate | omitted.
In this embodiment, the mixing promotion means for promoting the mixing of the used seawater and the dilution seawater is different, and instead of the turbulence generator 20 described above, an aeration nozzle 30 for generating fine bubbles b on the bottom surface of the water channel 9. Is installed. In the illustrated example, the aeration nozzle 30 is disposed below the desulfurization tower 2, and fine bubbles b are generated in a region where the used seawater flowing down from the used seawater outlet 6 merges with the dilution seawater.
Therefore, the used diluted seawater flowing through the water channel 9 is sufficiently agitated and mixed, and flows in a state where the concentration of the used seawater is substantially uniform and is subjected to decarboxylation treatment by aeration. Decarboxylation performance is improved.

続いて、本発明の第３の実施形態を図３に示して説明する。なお、上述した実施形態と同様の部分には同じ符号を付し、その詳細な説明は省略する。
この実施形態では、使用済海水と希釈用海水との混合を促進する混合促進手段として、上述した乱れ発生器２０とエアレーションノズル３０とが併用されている。すなわち、乱れ発生器２０により渦等の乱れを発生させるとともに、エアレーションノズル３０から微細気泡ｂを発生させることにより、水路９を流れる使用済希釈海水は、さらに十分な撹拌・混合を受けることとなる。従って、使用済希釈海水は、使用済海水の濃度がより一層均一化した状態で流れてエアレーションによる脱炭酸処理を受けるので、水路（ＳＷＴＳ）９における脱炭酸性能が向上する。 Subsequently, a third embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the part similar to embodiment mentioned above, and the detailed description is abbreviate | omitted.
In this embodiment, the turbulence generator 20 and the aeration nozzle 30 described above are used in combination as means for promoting mixing of the used seawater and the seawater for dilution. That is, the turbulence generator 20 generates turbulence such as a vortex and the fine bubbles b are generated from the aeration nozzle 30, so that the used diluted seawater flowing through the water channel 9 is further sufficiently stirred and mixed. . Therefore, the used diluted seawater flows in a state where the concentration of the used seawater is made more uniform and is subjected to decarboxylation treatment by aeration, so that the decarboxylation performance in the water channel (SWTS) 9 is improved.

このように、上述した本発明によれば、水路９内に使用済海水と希釈用海水との混合を促進する混合促進手段が設けられているので、混合・希釈の促進により使用済海水と希釈用海水との混合不良が解消される。このため、水路９内を流れる間に行われる使用済希釈海水の脱炭酸処理性能が向上するので、使用済希釈海水が排水される周辺海域の環境に及ぼす影響を低減できる。
なお、本発明は上述した実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において適宜変更することができる。 Thus, according to the present invention described above, since the mixing promotion means for accelerating the mixing of the used seawater and the dilution seawater is provided in the water channel 9, the used seawater and dilution are promoted by promoting the mixing / dilution. Mixing failure with seawater is eliminated. For this reason, since the decarboxylation performance of the used diluted seawater performed while flowing through the water channel 9 is improved, the influence on the environment of the surrounding sea area where the used diluted seawater is drained can be reduced.
In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary of this invention, it can change suitably.

本発明に係る排煙脱硫装置の第１の実施形態を示す構成図である。It is a lineblock diagram showing a 1st embodiment of a flue gas desulfurization device concerning the present invention. 本発明に係る排煙脱硫装置の第２の実施形態を示す構成図である。It is a block diagram which shows 2nd Embodiment of the flue gas desulfurization apparatus which concerns on this invention. 本発明に係る排煙脱硫装置の第３の実施形態を示す構成図である。It is a block diagram which shows 3rd Embodiment of the flue gas desulfurization apparatus which concerns on this invention. 排煙脱硫装置の従来例を示す構成図である。It is a block diagram which shows the prior art example of a flue gas desulfurization apparatus.

符号の説明Explanation of symbols

１ 排煙脱硫装置（海水脱硫装置）
２ 脱硫塔
３ 多孔板棚
５ 海水供給管
６ 使用済海水出口
７ ボイラ排ガス供給口
８ ボイラ排ガス排気口
９ 水路（ＳＷＴＳ）
２０ 乱れ発生器（混合促進手段）
３０ エアレーションノズル（混合促進手段） 1 Flue gas desulfurization equipment (seawater desulfurization equipment)
2 Desulfurization tower 3 Perforated plate shelf 5 Seawater supply pipe 6 Used seawater outlet 7 Boiler exhaust gas supply port 8 Boiler exhaust gas exhaust port 9 Water channel (SWTS)
20 Disturbance generator (mixing promotion means)
30 Aeration nozzle (mixing promotion means)

Claims (1)

水路と、
内部において前記水路内を流れる希釈用海水の表面に脱硫後の使用済海水を直接落下させる脱硫塔と、
前記希釈海水との混合により希釈された使用済希釈海水が前記水路を流れる間に脱炭酸処理される脱炭酸処理部と、
を備えた排煙脱硫装置であって、
前記脱炭酸処理部の上流側において、予め前記希釈用海水に乱流を発生させ、前記使用済海水と前記希釈用海水とを撹拌することにより、これらの混合を促進する混合促進手段を備えた排煙脱硫装置。 Waterways,
A desulfurization tower that directly drops used seawater after desulfurization onto the surface of dilution seawater flowing inside the water channel inside,
A decarboxylation treatment section that is decarboxylated while spent diluted seawater diluted by mixing with the diluted seawater flows through the water channel ;
A flue gas desulfurization device comprising:
On the upstream side of the decarbonation processing unit, a turbulent flow is generated in the dilution seawater in advance, and the mixing seam is promoted by agitation of the used seawater and the dilution seawater . Flue gas desulfurization equipment.
JP2007040459A 2007-02-21 2007-02-21 Flue gas desulfurization equipment Expired - Fee Related JP5199585B2 (en)

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PCT/JP2008/052898 WO2008102824A1 (en) 2007-02-21 2008-02-20 Flue gas desulfurization equipment
SG2012009213A SG178769A1 (en) 2007-02-21 2008-02-20 Exhaust gas desulfurizer
MYPI20091257A MY154937A (en) 2007-02-21 2008-02-20 Flue gas desulfurization equipment
TW097105924A TWI389734B (en) 2007-02-21 2008-02-20 Flue gas desulfurization device

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JP5166791B2 (en) * 2007-07-24 2013-03-21 三菱重工業株式会社 Flue gas desulfurization equipment
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WO2010095214A1 (en) * 2009-02-17 2010-08-26 月島機械株式会社 Wastewater treating system, and wastewater treating method
JP5754877B2 (en) * 2009-03-31 2015-07-29 三菱日立パワーシステムズ株式会社 Oxidation tank, seawater treatment device and seawater desulfurization system
EP2258462B1 (en) * 2009-06-05 2011-09-28 AE & E Lentjes GmbH Washer tower and accompanying exhaust gas purification device
WO2012127689A1 (en) * 2011-03-24 2012-09-27 月島機械株式会社 Flue gas desulfurization apparatus
JP2012236170A (en) * 2011-05-13 2012-12-06 Babcock Hitachi Kk Method and apparatus for regeneration of deteriorated absorbing liquid, and carbon dioxide recovery system using the same
CN103030231B (en) * 2011-09-29 2015-04-08 鞍钢股份有限公司 Recovery system and recovery process for desulfurized seawater
JP5998915B2 (en) * 2012-12-19 2016-09-28 富士電機株式会社 Exhaust gas treatment equipment
CN108218050A (en) * 2018-03-23 2018-06-29 东方电气集团东方锅炉股份有限公司 The quality recovery device and restoration methods of acid seawater after a kind of flue gas desulfurization with seawater
CN109939547B (en) * 2019-04-01 2021-08-17 唐山伟德船用设备有限公司 Washing tower suitable for ship exhaust gas desulfurization
CN111718018A (en) * 2020-07-17 2020-09-29 中国华电科工集团有限公司 Forced flowing aeration tank of seawater desulfurization system
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