JPH07155536A - Wet type flue gas desulfurization apparatus - Google Patents
Wet type flue gas desulfurization apparatusInfo
- Publication number
- JPH07155536A JPH07155536A JP5301599A JP30159993A JPH07155536A JP H07155536 A JPH07155536 A JP H07155536A JP 5301599 A JP5301599 A JP 5301599A JP 30159993 A JP30159993 A JP 30159993A JP H07155536 A JPH07155536 A JP H07155536A
- Authority
- JP
- Japan
- Prior art keywords
- absorption tower
- spray
- flue gas
- absorption
- wet flue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は湿式排煙脱硫装置に係
り、特に排ガス中の硫黄酸化物を低減するのに好適な湿
式排煙脱硫装置構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet flue gas desulfurization apparatus, and more particularly to a wet flue gas desulfurization apparatus structure suitable for reducing sulfur oxides in exhaust gas.
【０００２】[0002]
【従来の技術】火力発電所において、化石燃料の燃焼に
伴って発生する排煙中の硫黄酸化物、中でも特に二酸化
硫黄（ＳＯ2）は、大気汚染・酸性雨などの地球的環境
問題の主原因の一つである。このため、排煙中からＳＯ
2を除去する排煙脱硫法の研究および脱硫装置の開発は
極めて重要な課題となっている。上記脱硫システムとし
ては、最近低コストでシステムが簡単な簡易型の乾式脱
硫装置の開発が進められているが、脱硫率がせいぜい７
０〜８０％と低いこともあり、未だ湿式法が主流を占め
ている。この湿式法には、吸収剤にソーダ化合物を用い
るソーダ法、カルシウム化合物を用いるカルシウム法お
よびマグネシウム化合物を用いるマグネシウム法などが
ある。このうち、ソーダ法は吸収剤とＳＯ2との反応性
に優れている反面、使用するソーダ類が非常に高価であ
る。このため、発電用の大型ボイラなどの排煙脱硫装置
には、比較的安価な炭酸カルシウムなどのカルシウム化
合物を用いる方法が最も多く採用されている。2. Description of the Related Art Sulfur oxides, especially sulfur dioxide (SO 2 ) in flue gas generated by burning fossil fuels in thermal power plants is a major cause of global environmental problems such as air pollution and acid rain. It is one of the causes. For this reason, SO
Research on flue gas desulfurization method to remove 2 and development of desulfurization equipment have become extremely important issues. As for the desulfurization system, a simple dry desulfurization device with low cost and a simple system is being developed recently, but the desulfurization rate is at most 7
Since it is as low as 0 to 80%, the wet method still predominates. This wet method includes a soda method using a soda compound as an absorbent, a calcium method using a calcium compound, and a magnesium method using a magnesium compound. Among these, the soda method is excellent in reactivity between the absorbent and SO 2 , but the soda used is very expensive. For this reason, a method using a relatively inexpensive calcium compound such as calcium carbonate is most often used for a flue gas desulfurization apparatus such as a large-scale boiler for power generation.
【０００３】このカルシウム化合物を吸収液として用い
る脱硫システムは、気液接触方法の違いによりスプレー
方式、濡れ壁方式およびバブリング方式の３種類に大別
される。各方式ともそれぞれ特徴を有しているが、実績
が多く信頼性の高いスプレー方式が世界的にも多く採用
されている。このスプレー方式の脱硫システムとして
は、従来から排ガスの冷却・除塵を行う冷却塔、吸収液
を噴霧して排ガス中のＳＯ2と反応させる吸収塔、吸収
塔で生成した亜硫酸カルシウムを酸化する酸化塔の三塔
で構成されていた。しかし、近年になって吸収塔に冷却
・酸化の機能を持たせた一塔型脱硫システムの開発が進
み、最近では一塔型脱硫システムがスプレー方式の主流
になっている。Desulfurization systems using this calcium compound as an absorbing liquid are roughly classified into three types, a spray system, a wetting wall system and a bubbling system, depending on the difference in gas-liquid contact method. Although each method has its own characteristics, the spray method, which has a proven track record and is highly reliable, is widely used worldwide. As the spray type desulfurization system, a cooling tower for cooling and removing dust from exhaust gas, an absorption tower for spraying an absorbing liquid to react with SO 2 in the exhaust gas, and an oxidizing tower for oxidizing calcium sulfite produced in the absorbing tower have been used. It consisted of three towers. However, in recent years, the development of a one-tower desulfurization system in which the absorption tower has functions of cooling and oxidation has advanced, and recently, the one-tower desulfurization system has become the mainstream of the spray method.
【０００４】図６に従来技術のスプレー方式による一塔
型脱硫装置の一例を示す。一塔型の吸収塔は、主に塔本
体１、入口ダクト２、出口ダクト３、スプレノズル４、
吸収液循環ポンプ５、酸化タンク６、酸化用撹拌機７、
空気吹き込み管８、ミストエリミネータ９、石灰石スラ
リタンク１２、シックナ１３、遠心分離機１７などから
構成されている。スプレノズル４は水平方向に複数個、
さらに高さ方向に複数段設置されている。スプレノズル
４の段数としては、一般に４〜６段程度設置されること
が多いが、本図では簡略化のため４段で表すことにし
た。また、酸化用撹拌機７および空気吹き込み管８は吸
収塔下部の吸収液が滞留する酸化タンク６に設置され、
ミストエリミネータ９は吸収塔内最上部あるいは出口ダ
クト３内に設置される。FIG. 6 shows an example of a conventional one-column tower desulfurization system using a spray method. The single tower type absorption tower is mainly composed of a tower body 1, an inlet duct 2, an outlet duct 3, a spray nozzle 4,
Absorbing liquid circulation pump 5, oxidation tank 6, oxidation agitator 7,
It is composed of an air blowing pipe 8, a mist eliminator 9, a limestone slurry tank 12, a thickener 13, a centrifuge 17, and the like. A plurality of spray nozzles 4 are arranged in the horizontal direction,
Furthermore, multiple stages are installed in the height direction. Generally, the number of stages of the spray nozzle 4 is often 4 to 6, but in this figure, for simplicity, it is shown as 4 stages. Further, the oxidizing stirrer 7 and the air blowing pipe 8 are installed in the oxidizing tank 6 in the lower part of the absorption tower where the absorbing liquid stays,
The mist eliminator 9 is installed in the uppermost part of the absorption tower or in the outlet duct 3.
【０００５】ボイラなどの燃焼装置（図示せず）から排
出される排ガスは、入口ダクト２より吸収塔本体１に導
入され、出口ダクト３より排出される。この間、吸収塔
には循環ポンプ５から送られる炭酸カルシウムを含んだ
吸収液がスプレノズル４から噴霧され、吸収液と排ガス
の気液接触が行われる。このとき吸収液は排ガス中のＳ
Ｏ2を選択的に吸収し、亜硫酸カルシウムを生成する。
亜硫酸カルシウムを生成した吸収液は酸化タンク６に溜
まり、酸化用撹拌機７によって撹拌されながら、空気吹
き込み管８から供給される空気中の酸素により吸収液中
の亜硫酸カルシウムが酸化され石膏を生成する。炭酸カ
ルシウムおよび石膏が共存する酸化タンク６内の吸収液
の一部は、循環ポンプ５によって再びスプレノズル４に
送られる。石灰石は石灰石スラリタンク１２へ水と共に
供給されスラリ状にして酸化タンク６へ送られる。酸化
タンク６から一部の吸収液を抜き出しポンプ１１により
抜き出し、シックナ１３へ送り、シックナ１３で固体成
分を自然沈降させ上澄水と分離し、固体成分濃縮物タン
ク１５に送る。濃縮物タンク１５内の濃縮物はポンプ１
６により遠心分離機１７に送られ、ここで、さらに脱水
され、石膏１８として回収される。また、スプレノズル
４から噴霧され、微粒化された吸収液の中で、液滴径の
小さいものは排ガスに同伴されるが、吸収塔上部に設け
られたミストエリミネータ９によって回収される。スプ
レノズル４は図５で示すように吸収塔本体１内に設置さ
れているが、スプレノズル４へ吸収液を送るスプレヘッ
ダ１０の外表面、スプレヘッダ１０の支持材、スプレノ
ズル４の取付金具などには吸収液が直接当るため、これ
らの腐食と摩耗に対する対策が必要となる。Exhaust gas discharged from a combustion device (not shown) such as a boiler is introduced into the absorber main body 1 through the inlet duct 2 and discharged through the outlet duct 3. During this period, the absorption liquid containing calcium carbonate sent from the circulation pump 5 is sprayed from the spray nozzle 4 to the absorption tower, and the absorption liquid and the exhaust gas are brought into gas-liquid contact. At this time, the absorbing liquid is S in the exhaust gas.
It selectively absorbs O 2 and produces calcium sulfite.
The absorption liquid that has generated calcium sulfite is accumulated in the oxidation tank 6, and while being stirred by the agitation stirrer 7, oxygen in the air supplied from the air blowing pipe 8 oxidizes the calcium sulfite in the absorption liquid to generate gypsum. . A part of the absorbing liquid in the oxidation tank 6 in which calcium carbonate and gypsum coexist is sent to the spray nozzle 4 again by the circulation pump 5. The limestone is supplied to the limestone slurry tank 12 together with water and made into a slurry form and sent to the oxidation tank 6. A part of the absorbing liquid is taken out from the oxidation tank 6 by a pump 11 and sent to a thickener 13, where the solid component is allowed to spontaneously settle and separated from the supernatant water, and sent to a solid component concentrate tank 15. The concentrate in the concentrate tank 15 is pump 1
It is sent to the centrifuge 17 by means of 6, where it is further dehydrated and recovered as gypsum 18. Further, among the absorption liquids atomized and atomized from the spray nozzle 4, those having a small droplet size are entrained in the exhaust gas, but are recovered by the mist eliminator 9 provided at the upper part of the absorption tower. The spray nozzle 4 is installed in the absorption tower main body 1 as shown in FIG. 5, but the outer surface of the spray header 10 that sends the absorbent to the spray nozzle 4, the support material of the spray header 10, the mounting metal of the spray nozzle 4, etc. Therefore, it is necessary to take measures against these corrosion and wear.
【０００６】[0006]
【発明が解決しようとする課題】上記従来技術では、吸
収塔本体１内にスプレノズル４を多段に設置している
が、塔本体１内では吸収液が直接スプレノズル４の母管
やスプレノズル４の取付部に接触するため耐食、耐摩耗
などの考慮が必要となる。さらに、これらの母管および
スプレノズル４は塔内に設置するガスの流れを妨げるこ
とになるため、圧力損失を高めることになる。特に吸収
塔内でのガス流速を高め、さらに吸収塔のコンパクト化
を狙う場合には特にこの問題が顕著になる。そこで吸収
塔の側壁から吸収液をスプレする方法が有効となる。ま
た保守点検が容易である点からも吸収塔の側壁からの吸
収液のスプレは有利となる。ところが吸収塔の側壁から
吸収液をスプレするとスプレノズル４間に吸収液が噴霧
されていない領域が発生し、この部分をガスが吹き抜
け、脱硫性能を低下させる問題点が有る。そこで本発明
の目的はスプレノズルの取付部の腐食、摩耗などの考慮
が不要で、吸収塔のコンパクト化ができ、しかもスプレ
ノズル間の吸収液が噴霧されていない領域が発生しない
ような吸収塔を備えた湿式排煙脱硫装置を提供すること
である。In the above-mentioned prior art, the spray nozzles 4 are installed in multiple stages in the absorption tower main body 1. However, in the tower main body 1, the absorption liquid is directly attached to the mother pipe of the spray nozzle 4 or the spray nozzle 4. Since it comes into contact with the parts, it is necessary to consider corrosion resistance and wear resistance. Further, these mother tube and spray nozzle 4 impede the flow of the gas installed in the tower, thus increasing the pressure loss. This problem becomes particularly noticeable when the gas flow velocity in the absorption tower is increased and the absorption tower is made compact. Therefore, a method of spraying the absorbing liquid from the side wall of the absorption tower is effective. Further, from the viewpoint of easy maintenance and inspection, spraying of the absorbing liquid from the side wall of the absorption tower is advantageous. However, when the absorbing liquid is sprayed from the side wall of the absorption tower, a region where the absorbing liquid is not sprayed is generated between the spray nozzles 4, gas blows through this portion, and there is a problem that the desulfurization performance is deteriorated. Therefore, the object of the present invention is to eliminate the need to consider the corrosion of the mounting portion of the spray nozzle, wear, etc., to make the absorption tower compact, and to provide an absorption tower that does not generate a region where the absorbing liquid is not sprayed between the spray nozzles. Another object of the present invention is to provide a wet flue gas desulfurization device.
【０００７】[0007]
【課題を解決するための手段】本発明の上記目的は次の
構成によって達成される。すなわち、吸収液を吸収塔内
に噴霧させ、噴霧した吸収液とボイラなどの燃焼装置か
ら出る排ガスを接触させ、この排ガス中に含まれる硫黄
酸化物を除去する湿式排煙脱硫装置において、吸収液を
噴霧するスプレノズルを吸収塔のガス流の方向に沿う内
壁面のみに複数段設置する湿式排煙脱硫装置である。本
発明の前記湿式排煙脱硫装置において、吸収液を噴霧す
るスプレノズルは角筒型の吸収塔のコーナー部に配置さ
れる構成としても良い。The above objects of the present invention can be achieved by the following constitutions. That is, in the wet flue gas desulfurization device for spraying the absorption liquid into the absorption tower, bringing the sprayed absorption liquid into contact with the exhaust gas emitted from the combustion device such as a boiler, and removing the sulfur oxides contained in the exhaust gas, the absorption liquid It is a wet flue gas desulfurization device in which a plurality of spray nozzles for spraying are installed only on the inner wall surface along the gas flow direction of the absorption tower. In the wet flue gas desulfurization apparatus of the present invention, the spray nozzle for spraying the absorbing liquid may be arranged at the corner portion of the rectangular column type absorption tower.
【０００８】本発明の上記目的は次の構成によっても達
成される。すなわち、吸収液を吸収塔内に噴霧させ、噴
霧した吸収液とボイラなどの燃焼装置から出る排ガスを
接触させ、この排ガス中に含まれる硫黄酸化物を除去す
る湿式排煙脱硫装置において、吸収液を噴霧するスプレ
ノズルを吸収塔のガス流の方向に沿う内壁面に複数段設
置し、各スプレノズル間に発生する噴霧液滴が存在しな
い領域にある内壁面にガスの吹き抜け防止手段を設ける
湿式排煙脱硫装置である。本発明の前記湿式排煙脱硫装
置において、ガスの吹き抜け防止手段はスプレノズルか
らの吸収液の噴霧角に沿った形状のガイド板またはガス
流方向に沿う吸収塔内壁面を内側に窪ませて形成される
リング状の突出壁面で構成することもできる。ガスの吹
き抜け防止手段をリング状の突出壁面で構成した場合は
スプレノズルは吸収塔内壁のリング状の突出壁面のガス
流上流側の傾斜壁面に設けることが望ましい。本発明で
は、その形状が円筒型あるいは角筒型であり、排ガスの
吸収塔内での流れ方向が略鉛直方向である縦型吸収塔ま
たは排ガスの吸収塔内での流れ方向が略水平方向である
横型吸収塔に適用できる。The above object of the present invention can also be achieved by the following configuration. That is, in the wet flue gas desulfurization device for spraying the absorption liquid into the absorption tower, bringing the sprayed absorption liquid into contact with the exhaust gas emitted from the combustion device such as a boiler, and removing the sulfur oxides contained in the exhaust gas, the absorption liquid A plurality of spray nozzles for spraying gas are installed on the inner wall surface along the gas flow direction of the absorption tower, and gas blow-through prevention means is provided on the inner wall surface in the area where there are no spray droplets generated between each spray nozzle. It is a desulfurizer. In the wet flue gas desulfurization apparatus of the present invention, the gas blow-through prevention means is formed by inwardly denting the inner wall surface of the absorption tower along the guide plate having a shape along the spray angle of the absorbing liquid from the spray nozzle. It can also be configured with a ring-shaped protruding wall surface. When the gas blow-through prevention means is formed by a ring-shaped protruding wall surface, the spray nozzle is preferably provided on the inclined wall surface on the gas flow upstream side of the ring-shaped protruding wall surface of the inner wall of the absorption tower. In the present invention, the shape is a cylindrical type or a rectangular tube type, the flow direction in the absorption tower of the exhaust gas is a vertical direction or the flow direction in the absorption tower of the exhaust gas is a substantially horizontal direction. It can be applied to a horizontal absorption tower.
【０００９】[0009]
【作用】吸収塔内でのガス流方向に沿った吸収塔壁面の
みに吸収液噴霧用のスプレノズルを設け、該壁面でスプ
レノズルを支持させることにより、吸収液が直接スプレ
ノズルの母管やスプレノズルの取付部に接触することが
ないので、前記母管、取付部等の耐食、耐摩耗などの問
題がなく、また、母管等のスプレノズル付属部品による
ガスの流れが妨害されることもない。角筒型の吸収塔の
場合はそのコーナー部の壁面にスプレノズルを設置する
ことで、スプレノズルの噴霧角がほぼ角筒型の吸収塔壁
面に沿うので、吸収塔内に供給されたＳＯ2を含むガス
全量がスプレノズルから噴霧された吸収液と接触し、高
い脱硫性能が得られることになる。また、ガス流方向に
沿った吸収塔壁面のみに吸収液噴霧用のスプレノズルを
設けた場合には、スプレノズル間に吸収液が噴霧されて
いない領域が発生し、この部分をガスが吹き抜けるおそ
れがあるが、スプレノズル間の壁面にガス吹き抜け防止
手段を設けることで対応でき、この場合も高い脱硫率を
得ることができる。[Operation] A spray nozzle for spraying the absorbing liquid is provided only on the wall surface of the absorbing tower along the gas flow direction in the absorbing tower, and by supporting the spray nozzle on the wall surface, the absorbing liquid is directly attached to the mother pipe of the spray nozzle or the spray nozzle. Since there is no contact with the parts, there are no problems such as corrosion resistance and wear resistance of the mother pipe and the mounting portion, and the flow of gas by the spray nozzle attached parts such as the mother pipe is not disturbed. In the case of a rectangular tube type absorption tower, by installing a spray nozzle on the wall surface of the corner part, the spray angle of the spray nozzle is almost along the wall surface of the rectangular tube type absorption tower, so that the SO 2 supplied into the absorption tower is included. The entire amount of gas comes into contact with the absorbing liquid sprayed from the spray nozzle, and high desulfurization performance can be obtained. Further, when the spray nozzle for spraying the absorbing liquid is provided only on the wall surface of the absorption tower along the gas flow direction, a region where the absorbing liquid is not sprayed occurs between the spray nozzles, and the gas may blow through this portion. However, by providing a gas blow-through prevention means on the wall surface between the spray nozzles, this can be dealt with, and also in this case, a high desulfurization rate can be obtained.
【００１０】[0010]
【実施例】本発明による実施例を図面と共に説明する。
図１に示す実施例の吸収塔は図６で説明した吸収塔に置
き換えて、図６の湿式排煙脱硫システムに用いられる吸
収塔であり、図６に示す吸収塔と同一機能を持つ部分は
同一番号を付し、その説明は省略する。図２には図１の
吸収塔本体１のＡ−Ａ線断面図を示す。図１、２に示す
ようにスプレノズル４は角筒型の吸収塔本体１の側壁コ
ーナー部に多段に取り付けられているため、スプレヘッ
ダ１０は吸収塔外に設置できる。そのためスプレヘッダ
１０の外表面の腐食などの心配はなく、スプレヘッダ１
０およびスプレノズル４を支持するための支持材が不要
となる。さらにスプレノズル４の取付金具も吸収塔外に
出すことができるため、腐食などの心配がなく安い材料
の使用が可能となる。さらにスプレノズル４の取付金具
等の内装物による噴霧液滴の流れの圧力損失の増加はみ
られない。Embodiments of the present invention will be described with reference to the drawings.
The absorption tower of the embodiment shown in FIG. 1 is an absorption tower used in the wet flue gas desulfurization system of FIG. 6 in place of the absorption tower described in FIG. 6, and a portion having the same function as the absorption tower shown in FIG. The same numbers are attached and the description thereof is omitted. FIG. 2 shows a cross-sectional view of the absorption tower body 1 of FIG. 1 taken along the line AA. As shown in FIGS. 1 and 2, since the spray nozzles 4 are attached to the side wall corners of the rectangular column type absorption tower body 1 in multiple stages, the spray header 10 can be installed outside the absorption tower. Therefore, there is no concern about corrosion of the outer surface of the spray header 10 and the spray header 1
0 and the support material for supporting the spray nozzle 4 becomes unnecessary. Furthermore, since the fitting of the spray nozzle 4 can be taken out of the absorption tower, it is possible to use a cheap material without fear of corrosion. Furthermore, no increase in the pressure loss of the flow of the sprayed droplets due to the interior of the spray nozzle 4, such as the fittings, is seen.
【００１１】しかしながら単に吸収塔本体１の内壁にス
プレノズル４を取り付けると、噴霧液滴の軌跡１９はス
プレノズル４を頂点として円錐状に広がるため、スプレ
ノズル４の近傍ではスプレノズル４間に吸収液の液滴が
噴霧されない領域が発生する。そのため一部の塔内のガ
スは吸収液と接触せず吸収塔内を吹き抜け、全体に排ガ
スの脱硫性能は低い値となる。そこで図１、図２に示す
ように、ガス吹き抜け防止板２０を吸収塔の内壁の多段
に配置されたスプレノズル４の間に、これも複数段、取
り付けることにより円錐状に広がった噴霧液滴と吸収塔
内壁にできるすき間からのガスの吹き抜けを防止でき
る。このガス吹き抜け防止板２０はスプレノズル４から
の液滴の噴霧方向に向けて設置され、しかも、その液滴
の噴霧方向の幅は液滴が噴霧されない領域内に限定され
ているため、液滴の噴霧を阻害することはない。また、
図２に示すように本実施例は角筒型の吸収塔本体１のコ
ーナ部にスプレノズル４を取り付け、約９０度の角度で
吸収液を噴霧するので、噴霧液滴が存在しない領域がな
くなり、スプレノズル間の吹き抜けを防止することがで
きる。この場合、必ずしもガス吹き抜け防止板２０を設
ける必要はない。However, when the spray nozzle 4 is simply attached to the inner wall of the absorption tower main body 1, the trajectory 19 of the spray droplet spreads in a conical shape with the spray nozzle 4 as the apex. There is a region where is not sprayed. Therefore, some of the gas in the tower does not come into contact with the absorbing liquid and blows through the inside of the absorption tower, resulting in a low exhaust gas desulfurization performance. Therefore, as shown in FIG. 1 and FIG. 2, the gas blow-through prevention plates 20 are also installed between the spray nozzles 4 arranged in multiple stages on the inner wall of the absorption tower. It is possible to prevent gas from passing through the gap formed on the inner wall of the absorption tower. This gas blow-through prevention plate 20 is installed in the spray direction of the liquid droplets from the spray nozzle 4, and the width of the liquid droplets in the spray direction is limited to the area where the liquid droplets are not sprayed. Does not interfere with spraying. Also,
As shown in FIG. 2, in this embodiment, since the spray nozzle 4 is attached to the corner portion of the rectangular column type absorption tower main body 1 and the absorbing liquid is sprayed at an angle of about 90 degrees, there is no area where spray droplets exist, It is possible to prevent blow-through between the spray nozzles. In this case, it is not always necessary to provide the gas blow-through prevention plate 20.
【００１２】図３に本発明の吸収塔の他の実施例を示
す。この図は図１で示した吸収塔本体１が円筒型である
場合のＡ−Ａ線断面図を示したものである。スプレノズ
ル４から噴霧された液滴の軌跡１９はある角度を持って
円錐状に広がるため、この噴霧液滴の円錐状に広がる軌
跡１９のなす角度に沿って、円錐状または角筒型のガス
吹き抜け防止板２０をスプレノズル４の各段の間の吸収
塔本体１の内壁に複数段、取り付ける。このとき、ガス
吹き抜け防止板２０の液滴の噴霧方向の幅は噴霧液滴の
軌跡１９の外側の領域に限定されるので、スプレノズル
４間の吹き抜けを防止することができる。さらに図４に
本発明の吸収塔の他の実施例を示す。この図も図１で示
した吸収塔本体１が円筒型である場合のＡ−Ａ線断面図
を示したものである。図４の円筒型の吸収塔本体１にお
いて、その内壁に多段のリング状のガス吹き抜け防止板
２０を水平方向に設置し、同じ位置の該防止板２０の内
側端部に先端が臨むようにスプレノズル４を取り付ける
ことでガスの吹き抜けを防止するものである。FIG. 3 shows another embodiment of the absorption tower of the present invention. This figure is a sectional view taken along the line AA in the case where the absorption tower body 1 shown in FIG. 1 is a cylindrical type. Since the trajectory 19 of the droplets sprayed from the spray nozzle 4 spreads in a conical shape with a certain angle, the conical or rectangular tube-shaped gas blow-through is performed along the angle formed by the trajectory 19 of the spray droplets spreading in a conical shape. A plurality of prevention plates 20 are attached to the inner wall of the absorption tower body 1 between the respective stages of the spray nozzle 4. At this time, the width of the gas blow-through prevention plate 20 in the spray direction of the droplets is limited to the region outside the trajectory 19 of the spray droplets, so that the blow-through between the spray nozzles 4 can be prevented. Furthermore, FIG. 4 shows another embodiment of the absorption tower of the present invention. This figure also shows a sectional view taken along the line AA in the case where the absorption tower body 1 shown in FIG. 1 is a cylindrical type. In the cylindrical absorption tower body 1 of FIG. 4, a multi-stage ring-shaped gas blow-through prevention plate 20 is horizontally installed on the inner wall thereof, and the spray nozzle is arranged so that the tip faces the inner end of the prevention plate 20 at the same position. 4 is attached to prevent blow-through of gas.
【００１３】また、図５には同様な考え方に基づく他の
実施例を示す。図５に示す場合は、吸収塔本体１の塔壁
の一部を内側に曲げ、くの字型とし、これを水平方向の
円周部にドーナツ状に取り付けた装置である。スプレノ
ズル４は図５に示すようにこのくの字型のくぼみの下側
の傾斜面に取り付けることで、ガス流れに対し向流に吸
収液を噴霧することができる。スプレノズル４が一段し
かない場合は、スプレノズル４からの吸収液の噴霧でス
プレノズル４間に噴霧液滴が存在しない領域ができるが
二段のスプレノズル４を配置し、上下のスプレノズル４
を上下方向に千鳥配列することにより、この噴霧液滴が
存在しない領域をなくすことができる。同様な考えに基
づきスプレノズル４を四段、六段、八段等の複数段に設
置し、それぞれを上下方向に千鳥配列にすることもでき
る。FIG. 5 shows another embodiment based on the same concept. In the case shown in FIG. 5, a part of the tower wall of the absorption tower body 1 is bent inward to form a dogleg shape, and this is attached to a horizontal circumferential portion in a donut shape. As shown in FIG. 5, the spray nozzle 4 is attached to the lower inclined surface of the V-shaped recess, so that the absorbing liquid can be sprayed countercurrent to the gas flow. When the spray nozzle 4 has only one stage, there is a region where spray droplets do not exist between the spray nozzles 4 due to the spray of the absorbing liquid from the spray nozzle 4, but two stages of the spray nozzles 4 are arranged and the upper and lower spray nozzles 4 are arranged.
By arranging the dots in a zigzag pattern in the vertical direction, it is possible to eliminate the region where the spray droplets do not exist. Based on the same idea, the spray nozzles 4 can be installed in a plurality of stages such as four stages, six stages, and eight stages, and each can be arranged in a staggered arrangement in the vertical direction.
【００１４】[0014]
【発明の効果】本発明によれば、吸収液のスプレノズル
を吸収塔のガス流方向に沿った壁面のみに設置するため
従来法である塔内設置に比べ、スプレノズルに吸収液を
供給するヘッダの外壁およびスプレノズルの取付金具に
対する吸収液による腐食あるいは摩耗の心配がなくな
る。またヘッダなどを支える支持材が不要となり、保守
点検が容易となる。さらに塔内に設置されたヘッダ、ス
プレノズル、支持材などによる圧力損失の増加がなく、
動力費の低減を図ることができる吸収塔をコンパクト化
できる。また、吸収塔壁面にガスの吹き抜け防止手段を
設けるとスプレノズル間に噴霧液滴が存在しないガスの
吹き抜け部がなくなり、高い脱硫性能を得ることができ
る。According to the present invention, since the spray nozzle of the absorbing liquid is installed only on the wall surface along the gas flow direction of the absorption tower, the header of the header for supplying the absorbing liquid to the spray nozzle is installed as compared with the conventional installation in the tower. There is no need to worry about corrosion or wear of the absorbing liquid on the outer wall and the fitting of the spray nozzle. In addition, the support material that supports the header etc. is not required, which facilitates maintenance and inspection. Furthermore, there is no increase in pressure loss due to the header, spray nozzle, support materials installed in the tower,
The absorption tower capable of reducing the power cost can be made compact. Further, when a gas blow-through prevention means is provided on the wall surface of the absorption tower, there is no gas blow-through portion where spray droplets do not exist between the spray nozzles, and high desulfurization performance can be obtained.
【図１】 本発明による一実施例の湿式排煙脱硫装置に
おける吸収塔の側断面概略図である。FIG. 1 is a schematic side sectional view of an absorption tower in a wet flue gas desulfurization apparatus according to an embodiment of the present invention.
【図２】 図１の吸収塔が角筒型状である場合のＡ−Ａ
線断面図である。FIG. 2 is an AA in the case where the absorption tower of FIG. 1 has a prismatic shape.
It is a line sectional view.
【図３】 図１の吸収塔が円筒型状である場合の一実施
例のＡ−Ａ線断面図である。FIG. 3 is a cross-sectional view taken along the line AA of the embodiment in which the absorption tower of FIG. 1 has a cylindrical shape.
【図４】 図１の吸収塔が円筒型状である場合の一実施
例のＡ−Ａ線断面図である（ただし、ガス吹き抜け防止
板がスプレノズルと同じ高さにある場合）。FIG. 4 is a cross-sectional view taken along the line AA of an example in which the absorption tower of FIG. 1 has a cylindrical shape (provided that the gas blow-through prevention plate is at the same height as the spray nozzle).
【図５】 本発明による一実施例の湿式排煙脱硫装置に
おける吸収塔の側断面概略図である。FIG. 5 is a schematic side sectional view of an absorption tower in a wet flue gas desulfurization apparatus according to an embodiment of the present invention.
【図６】 従来技術の湿式排煙脱硫システムを示す図で
ある。FIG. 6 shows a prior art wet flue gas desulfurization system.
１…吸収塔本体、２…入口ダクト、３…出口ダクト、４
…スプレノズル、５…吸収液循環ポンプ、６…酸化タン
ク、１０…スプレヘッダ、１９…噴霧液滴の軌跡、２０
…ガス吹き抜け防止板1 ... Absorption tower body, 2 ... Entrance duct, 3 ... Exit duct, 4
... Spray nozzle, 5 ... Absorption liquid circulation pump, 6 ... Oxidation tank, 10 ... Spray header, 19 ... Trajectory of spray droplets, 20
… Gas blow-through prevention plate
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｄ 53/34 ＺＡＢ (72)発明者 吉川 博文 広島県呉市宝町３番36号 バブコック日立 株式会社呉研究所内 (72)発明者 中本 隆則 広島県呉市宝町６番９号 バブコック日立 株式会社呉工場内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location B01D 53/34 ZAB (72) Inventor Hirofumi Yoshikawa 3 36 Takaracho, Kure City, Hiroshima Prefecture Babcock Hitachi Ltd. Kure Research Institute (72) Inventor Takanori Nakamoto 6-9 Takaracho, Kure City, Hiroshima Prefecture Babcock Hitachi Kure Factory
Claims (7)
吸収液とボイラなどの燃焼装置から出る排ガスを接触さ
せ、この排ガス中に含まれる硫黄酸化物を除去する湿式
排煙脱硫装置において、 吸収液を噴霧するスプレノズルを吸収塔のガス流の方向
に沿う内壁面のみに複数段設置することを特徴とする湿
式排煙脱硫装置。1. A wet flue gas desulfurization apparatus for spraying an absorption liquid into an absorption tower, bringing the sprayed absorption liquid into contact with exhaust gas from a combustion device such as a boiler, and removing sulfur oxides contained in the exhaust gas. A wet flue gas desulfurization apparatus, characterized in that a plurality of spray nozzles for spraying an absorbing liquid are installed only on the inner wall surface along the gas flow direction of the absorption tower.
の吸収塔のコーナー部に配置されることを特徴とする請
求項１記載の湿式排煙脱硫装置。2. The wet flue gas desulfurization apparatus according to claim 1, wherein the spray nozzle for spraying the absorbing liquid is arranged at a corner portion of the rectangular column type absorption tower.
吸収液とボイラなどの燃焼装置から出る排ガスを接触さ
せ、この排ガス中に含まれる硫黄酸化物を除去する湿式
排煙脱硫装置において、 吸収液を噴霧するスプレノズルを吸収塔のガス流の方向
に沿う内壁面に複数段設置し、各スプレノズル間に発生
する噴霧液滴が存在しない領域にある内壁面にガスの吹
き抜け防止手段を設けることを特徴とする湿式排煙脱硫
装置。3. A wet flue gas desulfurization apparatus for spraying an absorption liquid into an absorption tower, bringing the sprayed absorption liquid into contact with exhaust gas from a combustion device such as a boiler, and removing sulfur oxides contained in the exhaust gas. , A plurality of spray nozzles for spraying the absorbing liquid are installed on the inner wall surface along the gas flow direction of the absorption tower, and gas blow-through prevention means is provided on the inner wall surface in the area where there are no spray droplets generated between the spray nozzles. A wet flue gas desulfurization device characterized by the above.
からの吸収液の噴霧角に沿った形状のガイド板であるこ
とを特徴とする請求項３記載の湿式排煙脱硫装置。4. The wet flue gas desulfurization apparatus according to claim 3, wherein the gas blow-through prevention means is a guide plate having a shape along the spray angle of the absorbing liquid from the spray nozzle.
沿う吸収塔内壁面を内側に窪ませて形成されるリング状
の突出壁面であることを特徴とする請求項３記載の湿式
排煙脱硫装置。5. The wet flue gas desulfurization according to claim 3, wherein the gas blow-through prevention means is a ring-shaped protruding wall surface formed by denting the inner wall surface of the absorption tower along the gas flow direction inwardly. apparatus.
突出壁面のガス流上流側の傾斜壁面に設けられることを
特徴とする請求項５記載の湿式排煙脱硫装置。6. The wet flue gas desulfurization apparatus according to claim 5, wherein the spray nozzle is provided on an inclined wall surface on the gas flow upstream side of the ring-shaped protruding wall surface of the inner wall of the absorption tower.
筒型であり、排ガスの吸収塔内での流れ方向が略鉛直方
向である縦型吸収塔または排ガスの吸収塔内での流れ方
向が略水平方向である横型吸収塔であることを特徴とす
る請求項１ないし６のいずれかに記載の湿式排煙脱硫装
置。7. The absorption tower has a cylindrical shape or a rectangular tube shape, and the flow direction of exhaust gas in the absorption tower is a vertical direction or the flow direction of exhaust gas in the absorption tower. 7. The wet flue gas desulfurization apparatus according to claim 1, wherein is a horizontal absorption tower having a substantially horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5301599A JPH07155536A (en) | 1993-12-01 | 1993-12-01 | Wet type flue gas desulfurization apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5301599A JPH07155536A (en) | 1993-12-01 | 1993-12-01 | Wet type flue gas desulfurization apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07155536A true JPH07155536A (en) | 1995-06-20 |
Family
ID=17898891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5301599A Pending JPH07155536A (en) | 1993-12-01 | 1993-12-01 | Wet type flue gas desulfurization apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07155536A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19753227A1 (en) * | 1997-12-01 | 1999-06-02 | Abb Research Ltd | Absorber tower for power station sulfur washers and refuse incinerators |
| JP2010115602A (en) * | 2008-11-13 | 2010-05-27 | Babcock Hitachi Kk | Two-step wet desulfurization method and apparatus |
| JP2013544645A (en) * | 2010-11-05 | 2013-12-19 | フルーア・テクノロジーズ・コーポレイション | Flue gas diffuser object |
| KR20180125126A (en) * | 2017-05-12 | 2018-11-22 | 주식회사 파나시아 | Exhaust gas treatment equipment including side spraying means |
| JP2020082017A (en) * | 2018-11-29 | 2020-06-04 | 株式会社東芝 | Carbon dioxide recovery system and operation method of the same |
| JP2020082018A (en) * | 2018-11-29 | 2020-06-04 | 株式会社東芝 | Carbon dioxide recovery system and operation method of the same |
| JP2021502895A (en) * | 2017-11-14 | 2021-02-04 | 中国石油化工股▲ふん▼有限公司 | Fluid distributors, reactors and their applications |
-
1993
- 1993-12-01 JP JP5301599A patent/JPH07155536A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19753227A1 (en) * | 1997-12-01 | 1999-06-02 | Abb Research Ltd | Absorber tower for power station sulfur washers and refuse incinerators |
| JP2010115602A (en) * | 2008-11-13 | 2010-05-27 | Babcock Hitachi Kk | Two-step wet desulfurization method and apparatus |
| JP2013544645A (en) * | 2010-11-05 | 2013-12-19 | フルーア・テクノロジーズ・コーポレイション | Flue gas diffuser object |
| KR20180125126A (en) * | 2017-05-12 | 2018-11-22 | 주식회사 파나시아 | Exhaust gas treatment equipment including side spraying means |
| JP2021502895A (en) * | 2017-11-14 | 2021-02-04 | 中国石油化工股▲ふん▼有限公司 | Fluid distributors, reactors and their applications |
| JP2020082017A (en) * | 2018-11-29 | 2020-06-04 | 株式会社東芝 | Carbon dioxide recovery system and operation method of the same |
| JP2020082018A (en) * | 2018-11-29 | 2020-06-04 | 株式会社東芝 | Carbon dioxide recovery system and operation method of the same |
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