JPH08126813A - Absorber of wet flue gas desulfurizer - Google Patents
Absorber of wet flue gas desulfurizerInfo
- Publication number
- JPH08126813A JPH08126813A JP6267116A JP26711694A JPH08126813A JP H08126813 A JPH08126813 A JP H08126813A JP 6267116 A JP6267116 A JP 6267116A JP 26711694 A JP26711694 A JP 26711694A JP H08126813 A JPH08126813 A JP H08126813A
- Authority
- JP
- Japan
- Prior art keywords
- spray
- spray nozzle
- upward
- sprayed
- flue gas
- 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.)
- Granted
Links
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、湿式排煙脱硫装置の吸
収塔に係り、特にドラフト損失が小さく、脱硫効率が高
い湿式排煙脱硫装置の吸収塔に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption tower of a wet flue gas desulfurization device, and more particularly to an absorption tower of a wet flue gas desulfurization device having a small draft loss and high desulfurization efficiency.
【０００２】[0002]
【従来の技術】湿式排煙脱硫装置において、硫黄酸化物
含有ガスと塔内を循環する吸収剤スラリとの気液接触を
行う吸収塔としては、吸収剤スラリをガスと対向流で噴
霧する噴霧ノズルを備えたものが知られており、このよ
うな吸収塔（以下、スプレー塔ということがある）はド
ラフト損失が小さく、構造が簡単であるという利点を有
している。しかし、その反面、高い脱硫率を得るために
は吸収液スラリを多量に噴霧するため、被処理ガス導入
部への吸収液スラリの飛散が多く、乾湿境界部となる被
処理ガス導入部でのスケーリングが発生するという問題
がある。この問題を解決するために種々の工夫がなされ
ており、その代表的なものとして吸収塔下部の被処理ガ
スの導入部に多孔板を設けたもの（特開昭５４−１６１
５８７号公報）、被処理ガスの導入部に多孔板と該多孔
板の下面を洗浄する洗浄用スプレーを設けたもの（特願
昭６０−１４０６２５号公報）等が知られている。2. Description of the Related Art In a wet flue gas desulfurization apparatus, as an absorption tower for making gas-liquid contact between a sulfur oxide-containing gas and an absorbent slurry circulating in the tower, a spray for spraying the absorbent slurry in countercurrent with the gas is used. There is known one provided with a nozzle, and such an absorption tower (hereinafter sometimes referred to as a spray tower) has an advantage that a draft loss is small and a structure is simple. However, on the other hand, in order to obtain a high desulfurization rate, a large amount of the absorbing liquid slurry is sprayed, so that the absorbing liquid slurry is often scattered to the treated gas introducing part, and the treated gas introducing part which becomes the dry-wet boundary part There is a problem that scaling occurs. Various measures have been taken in order to solve this problem, and as a typical example thereof, a perforated plate is provided at the lower portion of the absorption tower at which the gas to be treated is introduced (JP-A-54-161).
No. 587), a device in which a perforated plate and a cleaning spray for cleaning the lower surface of the perforated plate are provided in the introduction portion of the gas to be treated (Japanese Patent Application No. 60-140625).
【０００３】図２はこのような吸収塔を示す説明図であ
る。この吸収塔は被処理ガス導入部に多孔板１０および
洗浄スプレー１１が設けられている。ガス入口ダクト５
からスプレー塔本体１に導入された硫黄酸化物を含有す
る排ガスは、多孔板１０を通過して上昇し、スプレー塔
本体１の多孔板１０および洗浄スプレー１１より上部に
設けられた多段の噴霧ノズル２から噴霧される吸収液ス
ラリと接触して硫黄酸化物が除去された後、処理ガスと
してガス出口ダクト７から系外へ排出される。噴霧ノズ
ル２から噴霧される吸収液スラリはスプレー塔本体１の
下部に設けられた循環タンク８から循環ポンプ６により
スプレー配管９を介して供給される。このとき洗浄スプ
レー１１は前記多孔板１０の下面に吸収液スラリをスプ
レーすることによりスケールの発生を防止している。FIG. 2 is an explanatory view showing such an absorption tower. In this absorption tower, a perforated plate 10 and a cleaning spray 11 are provided at the treated gas introduction portion. Gas inlet duct 5
The exhaust gas containing sulfur oxides introduced into the spray tower main body 1 from the above passes through the perforated plate 10 and rises, and the multistage spray nozzles provided above the perforated plate 10 and the cleaning spray 11 of the spray tower main body 1. After the sulfur oxide is removed by coming into contact with the absorbing liquid slurry sprayed from No. 2, the processing gas is discharged from the gas outlet duct 7 to the outside of the system. The absorbing liquid slurry sprayed from the spray nozzle 2 is supplied from a circulation tank 8 provided in the lower portion of the spray tower body 1 by a circulation pump 6 through a spray pipe 9. At this time, the cleaning spray 11 prevents the generation of scale by spraying the absorbing liquid slurry on the lower surface of the porous plate 10.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来技術は、多孔板１０によるドラフト損失が大きいとい
う欠点があり、例えば排ガス中の硫黄酸化物濃度が高い
場合または高い脱硫率が要求される場合等において、循
環吸収液量を多くするとその傾向は一段と強くなる。ま
た、多孔板１０の下面へのスケーリングを防止するため
に、洗浄スプレー１１から多量のスラリーを噴出させね
ばならず、循環ポンプ６が大型化し、消費電力量が増大
するという問題がある。本発明の目的は、上記従来技術
の問題点を解消し、ドラフト損失が小さく、優れた脱硫
性能が得られる湿式排煙脱硫装置の吸収塔を提供するこ
とにある。また、本発明の目的は、ドラフト損失が小さ
く、消費電力量が少ない湿式排煙脱硫装置の吸収塔を提
供することにある。However, the above-mentioned prior art has a drawback that the draft loss due to the porous plate 10 is large, for example, when the concentration of sulfur oxides in the exhaust gas is high or when a high desulfurization rate is required. In the above, the tendency becomes even stronger when the amount of the circulating absorption liquid is increased. Further, in order to prevent scaling of the lower surface of the perforated plate 10, a large amount of slurry must be jetted from the cleaning spray 11, which causes a problem that the circulation pump 6 becomes large and power consumption increases. An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide an absorption tower of a wet flue gas desulfurization device which has a small draft loss and can obtain excellent desulfurization performance. It is another object of the present invention to provide an absorption tower of a wet flue gas desulfurization device having a small draft loss and a low power consumption.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
本発明は、次の構成を採用する。すなわち、塔下部に導
入される排ガスを塔内で２段以上からなるスプレーヘッ
ダに取り付けられた噴霧ノズルから噴霧される吸収液ス
ラリに接触させて、排ガス中の硫黄酸化物を吸収液に吸
収させ、塔頂部から処理ガスを排出する湿式排煙脱硫装
置の吸収塔において、少なくとも前記排ガスの導入部に
最も近い最下段のスプレーヘッダに取り付けられる噴霧
ノズルを上向きにし、該上向き噴霧ノズルより噴霧され
る吸収液スラリを、それより上部に設置されるスプレー
ヘッダに取り付けられる下向きの噴霧ノズルより噴霧さ
れる吸収液スラリと対向流で接触させる湿式排煙脱硫装
置の吸収塔である。In order to achieve the above object, the present invention employs the following constitutions. That is, the exhaust gas introduced into the lower part of the tower is brought into contact with the absorbent slurry that is sprayed from the spray nozzle attached to the spray header consisting of two or more stages in the tower, and the sulfur oxide in the exhaust gas is absorbed by the absorbent. In the absorption tower of the wet flue gas desulfurization apparatus that discharges the treated gas from the top of the tower, at least the spray nozzle attached to the lowest spray header closest to the exhaust gas introduction section is directed upward, and sprayed from the upward spray nozzle. It is an absorption tower of a wet flue gas desulfurization device in which the absorbent slurry is brought into contact with the absorbent slurry sprayed from a downward spray nozzle attached to a spray header installed above the slurry in a counter flow.
【０００６】また、最下段より２段以上の上のスプレー
ヘッダに取り付けられる噴霧ノズルも上向きにし、該上
向き噴霧ノズルより噴霧される吸収液スラリを、それよ
り上部に設置されるスプレーヘッダに取り付けられる下
向きの噴霧ノズルより噴霧される吸収液スラリと対向流
で接触させる構成を採用してもよい。このとき、互いに
対向する上向きの噴霧ノズルと下向きの噴霧ノズルは同
一鉛直線上に設けると対向流で接触する噴霧スラリは効
率良く、衝突させることができる。スプレーヘッダの上
向きの噴霧ノズルと向い合うその上段のスプレーヘッダ
の下向きの噴霧ノズルとのノズル先端間の距離は１ｍ以
上とすることが望ましい。また、上向きの噴霧ノズルの
背圧を下向きの噴霧ノズルの背圧より高くすることによ
り、対向する噴霧スラリの衝突効果が上がり、また、上
向き噴霧ノズル用のポンプとこれより一段上の下向きの
噴霧ノズル用のポンプとを同一の揚程容量のポンプが使
用できる。Further, the spray nozzles attached to the spray headers two or more stages above the bottom stage are also directed upward, and the absorbing liquid slurry sprayed from the upward spray nozzles is attached to the spray header installed above it. You may employ | adopt the structure which contacts with the absorption liquid slurry sprayed from the downward spray nozzle by counterflow. At this time, if the upward spray nozzles and the downward spray nozzles facing each other are provided on the same vertical line, the spray slurries that are in contact with each other in a counter flow can be efficiently collided. The distance between the nozzle tip of the upward spray nozzle facing the upward spray nozzle of the spray header and the downward spray nozzle of the upper spray header is preferably 1 m or more. Also, by making the back pressure of the upward spray nozzle higher than the back pressure of the downward spray nozzle, the collision effect of the opposing spray slurries is enhanced, and the pump for the upward spray nozzle and the downward spray one step higher than this. A pump with the same lift capacity can be used as the pump for the nozzle.
【０００７】[0007]
【作用】吸収塔下部の被処理ガス（排ガス）の導入部に
上向きの噴霧ノズルを取り付けたスプレーヘッダを設け
たことにより、これより上部で被処理ガスと対向流で噴
霧される吸収液スラリが被処理ガスの導入部に飛散する
ことを抑制し、被処理ガス導入部でのスケーリングを防
止することができる。また、多孔板を設けることなく被
処理ガス導入部への吸収液スラリの飛散を防止できるた
め、多孔板部ではドラフト損失を考慮する必要がなく、
吸収塔のドラフト損失が低減される。本発明においては
スプレーヘッダの上向きの噴霧ノズルと向い合うその上
段のスプレーヘッダの下向きの噴霧ノズルとのノズル先
端間の距離は１ｍ以上とし、上向きの噴霧ノズルの噴霧
圧を高く（望ましくは０．５ｂａｒ以上）することが望
ましい。これにより、噴霧吸収液スラリの衝突効果を上
げることができる。これに反し、ノズル先端間の距離を
１ｍ以下にすると、下向きの噴霧ノズルからの噴霧液の
噴霧力が強く、上向きの噴霧液による緩衝効果が減じら
れるとともに、下向きの噴霧ノズルが被処理ガス導入部
に近くなるため、被処理ガス導入部への吸収液スラリの
飛散防止効果が低下し、ガス入口ダクト内にスラリが堆
積する原因となる。また、起動時には、上向きの噴霧ノ
ズルから先に吸収液スラリの噴霧を開始させることで、
吸収塔下部の被処理ガス導入部でのスケーリング発生を
防ぐことができる。[Function] By providing the spray header having the upward spray nozzle attached to the portion for introducing the gas to be treated (exhaust gas) at the lower part of the absorption tower, the absorbing liquid slurry sprayed in counterflow with the gas to be treated is provided above the spray header. It is possible to suppress the scattering of the gas to be treated into the introducing portion and prevent the scaling of the gas to be treated introducing portion. Further, since it is possible to prevent the absorption liquid slurry from scattering to the target gas introduction part without providing a porous plate, it is not necessary to consider draft loss in the porous plate part,
The draft loss of the absorption tower is reduced. In the present invention, the distance between the nozzle tip of the upward spray nozzle of the spray header and the downward spray nozzle of the upper spray header facing the spray header is 1 m or more, and the spray pressure of the upward spray nozzle is high (preferably 0. 5 bar or more) is desirable. As a result, it is possible to improve the collision effect of the sprayed absorbent slurry. On the contrary, when the distance between the nozzle tips is set to 1 m or less, the spraying force of the spraying liquid from the downward spraying nozzle is strong, the buffering effect of the upward spraying liquid is reduced, and the downward spraying nozzle introduces the gas to be treated. Since it is close to the portion, the effect of preventing the absorption liquid slurry from scattering to the treated gas introduction portion is reduced, which causes the accumulation of slurry in the gas inlet duct. In addition, at the time of startup, by starting the spray of the absorbent slurry first from the upward spray nozzle,
It is possible to prevent the occurrence of scaling in the treated gas introduction portion below the absorption tower.
【０００８】[0008]
【実施例】図１は、本発明の一実施例を示す湿式排煙脱
硫装置の吸収塔を示す図である。図１においてこの吸収
塔は、ガス入口ダクト５およびガス出口ダクト７を有す
るスプレー塔本体１と、該スプレー塔本体１の上部に設
けられた排ガスと対向流で気液接触を行うための吸収液
を噴霧する下向き噴霧ノズル２と、該噴霧ノズル２の上
方のガス出口ダクト７の近傍に設けられたミストエリミ
ネータ４と、前記ガス入口ダクト５とスプレー塔本体１
との連結部の直上部に設けられた上向き噴霧ノズル３
と、前記スプレー塔本体１の下部に設けられた吸収液ス
ラリの循環タンク８内の吸収液スラリをスプレー配管９
を経て循環させる循環ポンプ６から主として構成されて
いる。1 is a diagram showing an absorption tower of a wet flue gas desulfurization apparatus showing an embodiment of the present invention. In FIG. 1, this absorption tower comprises a spray tower main body 1 having a gas inlet duct 5 and a gas outlet duct 7, and an absorbing liquid for making gas-liquid contact with the exhaust gas provided in the upper part of the spray tower main body 1 in a counterflow. Downward spray nozzle 2, a mist eliminator 4 provided near the gas outlet duct 7 above the spray nozzle 2, the gas inlet duct 5, and the spray tower body 1
An upward spray nozzle 3 provided directly above the connecting portion with
And the absorption liquid slurry in the circulation tank 8 of the absorption liquid slurry provided in the lower part of the spray tower body 1 is sprayed with a pipe 9
It is mainly composed of a circulation pump 6 that circulates through.
【０００９】硫黄酸化物含有排ガスは、ガス入口ダクト
５からスプレー塔本体１に導入され、スプレー配管９お
よび上向き噴霧ノズル３を経て円錐状にスプレーされた
吸収液スラリと接触して一部が脱硫されるとともに、該
上向き噴霧ノズル３によりスプレーされた吸収液スラリ
と下向き噴霧ノズル２を経て円錐状にスプレーされた吸
収液スラリとの交差、干渉部を通過することにより、流
速が均一化されると同時に、硫黄酸化物の一部も除去さ
れた後、上部に設置の下向き噴霧ノズル２によりスプレ
ーされた吸収液スラリと接触して硫黄酸化物の大部分が
除去され、さらにスプレー塔本体１の上部に設けられた
ミストエリミネータ４で同伴ミストが除かれた後、処理
ガスとしてガス出口ダクト７から系外に排出される。The sulfur oxide-containing exhaust gas is introduced from the gas inlet duct 5 into the spray tower body 1 and comes into contact with the conical sprayed absorbent slurry through the spray pipe 9 and the upward spray nozzle 3 to partially desulfurize it. At the same time, the flow rate of the absorbing liquid is made uniform by passing through the intersecting portion and the interference portion of the absorbing liquid slurry sprayed by the upward spraying nozzle 3 and the absorbing liquid slurry sprayed in a cone shape through the downward spraying nozzle 2. At the same time, after part of the sulfur oxides is also removed, most of the sulfur oxides are removed by contact with the absorbing liquid slurry sprayed by the downward spray nozzle 2 installed on the upper part, After the entrained mist is removed by the mist eliminator 4 provided in the upper part, the gas is discharged as a processing gas from the gas outlet duct 7 to the outside of the system.
【００１０】本実施例によれば、被処理ガス導入部の所
定の位置に上向き噴霧ノズル３を設け、下向き噴霧ノズ
ル２と対向流で吸収液を噴霧させることにより、吸収液
スラリのガス入口ダクト５部への飛散が防止されるの
で、ガス入口ダクト５内におけるスラリの堆積がなくな
る。さらに、上向き噴霧ノズル３と下向き噴霧ノズル２
を対向流で吸収液を噴霧、干渉させることにより吸収塔
内でガス流速が均一化しドラフト損失が減少すると共に
気液接触効率がよくなり脱硫効率が向上する。According to this embodiment, the upward spray nozzle 3 is provided at a predetermined position of the gas to be treated portion, and the absorbing liquid is sprayed in a counterflow with the downward spray nozzle 2, whereby the gas inlet duct of the absorbing liquid slurry is provided. Since scattering to the 5th part is prevented, accumulation of slurry in the gas inlet duct 5 is eliminated. Further, the upward spray nozzle 3 and the downward spray nozzle 2
By spraying and interfering the absorption liquid with the counter flow, the gas flow velocity becomes uniform in the absorption tower, the draft loss is reduced, the gas-liquid contact efficiency is improved, and the desulfurization efficiency is improved.
【００１１】また、図示していないが最下段より２段以
上の上のスプレーヘッダに取り付けられる噴霧ノズルも
上向きにし、該上向き噴霧ノズルより噴霧されるスラリ
を、それより上部に設置されるスプレーヘッダに取り付
けられる下向きの噴霧ノズルより噴霧されるスラリと対
向流で接触する構成を採用すると、さらに吸収塔内でガ
ス流速が均一化しドラフト損失が減少すると共に気液接
触効率がよくなり脱硫効率が向上する。Although not shown in the drawing, the spray nozzles attached to the spray header above the lowermost two or more stages are also directed upward, and the slurry sprayed from the upward spray nozzles is installed above the spray header. Adopting a structure that makes contact with the slurry sprayed from the downward spray nozzle attached to the counter in a counter flow, the gas flow rate becomes more uniform in the absorption tower, draft loss is reduced, and gas-liquid contact efficiency improves and desulfurization efficiency improves. To do.
【００１２】このとき、互いに対向する上向きの噴霧ノ
ズル３と下向きの噴霧ノズル２は同一鉛直線上に設ける
と対向流で接触する噴霧スラリは効率良く、衝突させる
ことができる。そして、スプレーヘッダの上向きの噴霧
ノズル３と向い合うその上段のスプレーヘッダの下向き
の噴霧ノズル２とのノズル先端間の距離は１ｍ以上とす
ることが望ましい。また、上向きの噴霧ノズル３の背圧
を下向きの噴霧ノズル２の背圧より０．５ｂａｒ以上高
くすることにより、吸収液スラリの衝突効果が上がり、
さらに二次的効果として一段上の下向き噴霧ノズル２用
の吸収液スラリ供給ポンプと同一の揚程容量のポンプが
使用できる。また、起動時には、上向きの噴霧ノズル３
から先に吸収液スラリの噴霧を開始させることで、吸収
塔下部の被処理ガス導入部でのスケーリング発生を防ぐ
ことができる。At this time, if the upward spray nozzles 3 and the downward spray nozzles 2 facing each other are provided on the same vertical line, the spray slurries that are in contact with each other in a counter flow can be efficiently collided. The distance between the nozzle tip of the upward spray nozzle 3 of the spray header and the downward spray nozzle 2 of the upper spray header facing the spray header 3 is preferably 1 m or more. Further, by making the back pressure of the upward spray nozzle 3 higher than the back pressure of the downward spray nozzle 2 by 0.5 bar or more, the impact effect of the absorbing liquid slurry is improved,
Further, as a secondary effect, a pump having the same lift capacity as that of the absorbing liquid slurry supply pump for the downward spray nozzle 2 one step higher can be used. Also, at the time of startup, the upward spray nozzle 3
By starting the spraying of the absorbing liquid slurry first, it is possible to prevent the occurrence of scaling in the treated gas introduction portion in the lower part of the absorption tower.
【００１３】次に本発明を具体的データによりさらに詳
細に説明する。 実施例１ 図１に示したスプレー塔本体１の塔径を６７０ｍｍ、上
向き噴霧ノズル３を１段、下向き噴霧ノズル２を４段と
して、吸収液に石灰石スラリを用い、排ガス量を２５０
０Ｎｍ3／ｈ（吸収塔入口ガスベース）として硫黄酸化
物含有排ガス中の硫黄酸化物を吸収したところ、脱硫率
は９５％であり、この時の吸収塔のドラフト損失は６０
ｍｍＨ2Ｏであった。また、ガス入口ダクト５内へのス
ラリの堆積は見られなかった。Next, the present invention will be described in more detail with concrete data. Example 1 A spray tower main body 1 shown in FIG. 1 has a tower diameter of 670 mm, an upward spray nozzle 3 is one stage, and a downward spray nozzle 2 is four stages, and a limestone slurry is used as an absorbing liquid, and an exhaust gas amount is 250.
When the sulfur oxide in the sulfur oxide-containing exhaust gas was absorbed as 0 Nm 3 / h (gas base at the inlet of the absorption tower), the desulfurization rate was 95%, and the draft loss of the absorption tower at this time was 60%.
mmH was 2 O. Further, no accumulation of slurry was found in the gas inlet duct 5.
【００１４】比較例１ 上向き噴霧ノズル３を取り付けた最下段のスプレーヘッ
ダの代わりに、従来の多孔板１０を用いた以外は前記実
施例１と同様にして硫黄酸化物含有ガスを脱硫したとこ
ろ、脱硫率は９５％であったが、吸収塔のドラフト損失
は９０ｍｍＨ2Ｏと大きかった。また多孔板１０の下面
にスケールが付着した。実施例１、比較例１におけるガ
スの塔断面積における偏流率、ドラフト損失および脱硫
率を表１に示す。Comparative Example 1 The sulfur oxide-containing gas was desulfurized in the same manner as in Example 1 except that the conventional porous plate 10 was used in place of the lowermost spray header having the upward spray nozzle 3 attached. The desulfurization rate was 95%, but the draft loss of the absorption tower was as large as 90 mmH 2 O. In addition, scale adhered to the lower surface of the porous plate 10. Table 1 shows the nonuniform flow rate, draft loss and desulfurization rate in the gas column cross-sectional areas in Example 1 and Comparative Example 1.
【００１５】[0015]
【表１】 表１より、従来の多孔板１０を用いた場合（比較例１）
はドラフト損失が大きくなること、また多孔板１０への
スケーリング防止が必要となることがわかる。[Table 1] From Table 1, when using the conventional porous plate 10 (Comparative Example 1)
It can be seen that the draft loss becomes large and it is necessary to prevent scaling of the porous plate 10.
【００１６】[0016]
【発明の効果】本発明によれば吸収塔のドラフト損失が
減少し、脱硫ファンの消費電力量の低減が可能となる。
また、十分な整流効果も得られ、気液接触効率もよくな
るので脱硫効率が向上する。さらに噴霧ノズルから円錐
状にスプレーされた吸収液スラリの飛散が防止されるの
で、例えばガス入口ダクト内でのスラリの堆積を防止す
ることができる。According to the present invention, the draft loss of the absorption tower is reduced, and the power consumption of the desulfurization fan can be reduced.
Further, a sufficient rectifying effect can be obtained and the gas-liquid contact efficiency is improved, so that the desulfurization efficiency is improved. Furthermore, since the absorption liquid slurry sprayed in a conical shape from the spray nozzle is prevented from scattering, it is possible to prevent the accumulation of the slurry in the gas inlet duct, for example.
【図１】 本発明の一実施例による湿式排煙脱硫装置の
吸収塔を示す説明図である。FIG. 1 is an explanatory view showing an absorption tower of a wet flue gas desulfurization apparatus according to an embodiment of the present invention.
【図２】 従来の湿式排煙脱硫装置の吸収塔を示す説明
図である。FIG. 2 is an explanatory diagram showing an absorption tower of a conventional wet flue gas desulfurization apparatus.
１…スプレー塔本体、２…下向き噴霧ノズル、３…上向
き噴霧ノズル、４…ミストエリミネータ、５…ガス入口
ダクト、６…循環ポンプ、７…ガス出口ダクト、８…循
環タンク、９…スプレー配管DESCRIPTION OF SYMBOLS 1 ... Spray tower main body, 2 ... Downward spray nozzle, 3 ... Upward spray nozzle, 4 ... Mist eliminator, 5 ... Gas inlet duct, 6 ... Circulation pump, 7 ... Gas outlet duct, 8 ... Circulation tank, 9 ... Spray piping
───────────────────────────────────────────────────── 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 Ｂ０１Ｄ 53/34 １２５ Ｅ (72)発明者 片川 篤 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 number Internal reference number FI Technical display location B01D 53/34 ZAB B01D 53/34 125 E (72) Inventor Atsushi Katakawa 6 Takaracho, Kure City, Hiroshima Prefecture No. 9 Babcock Hitachi Kure Factory
Claims (5)
以上からなるスプレーヘッダに取り付けられた噴霧ノズ
ルから噴霧される吸収液スラリに接触させて、排ガス中
の硫黄酸化物を吸収液に吸収させ、塔頂部から処理ガス
を排出する湿式排煙脱硫装置の吸収塔において、少なく
とも前記排ガスの導入部に最も近い最下段のスプレーヘ
ッダに取り付けられる噴霧ノズルを上向きにし、該上向
き噴霧ノズルより噴霧される吸収液スラリを、それより
上部に設置されるスプレーヘッダに取り付けられる下向
きの噴霧ノズルより噴霧される吸収液スラリと対向流で
接触させることを特徴とする湿式排煙脱硫装置の吸収
塔。1. Exhaust gas introduced into the lower part of the tower is brought into contact with an absorbent slurry which is sprayed from a spray nozzle attached to a spray header having two or more stages in the tower to absorb sulfur oxides in the exhaust gas. In the absorption tower of the wet flue gas desulfurization apparatus that absorbs the gas and discharges the treated gas from the top of the tower, at least the spray nozzle attached to the lowermost spray header closest to the introduction part of the exhaust gas is directed upward, and from the upward spray nozzle. An absorption tower of a wet flue gas desulfurization apparatus, characterized in that the absorbing liquid slurry to be sprayed is brought into contact with the absorbing liquid slurry sprayed from a downward spray nozzle attached to a spray header installed above it in a counterflow. .
ダに取り付けられる噴霧ノズルも上向きにし、該上向き
噴霧ノズルより噴霧される吸収液スラリを、それより上
部に設置されるスプレーヘッダに取り付けられる下向き
の噴霧ノズルより噴霧される吸収液スラリと対向流で接
触させることを特徴とする請求項１記載の湿式排煙脱硫
装置の吸収塔。2. A spray nozzle attached to a spray header at least two stages above the bottom stage is also directed upward, and an absorbent slurry that is sprayed from the upward spray nozzle is attached to a spray header installed above it. 2. The absorption tower of a wet flue gas desulfurization apparatus according to claim 1, wherein the absorption liquid slurry sprayed from a downward spray nozzle is brought into contact with the slurry in a counter flow.
霧ノズルの背圧より高くすることを特徴とする請求項１
または２記載の湿式排煙脱硫装置の吸収塔。3. The back pressure of the upward spray nozzle is higher than the back pressure of the downward spray nozzle.
Or the absorption tower of the wet flue gas desulfurization apparatus according to 2.
向い合うその上段のスプレーヘッダの下向きの噴霧ノズ
ルとのノズル先端間の距離は１ｍ以上とすることを特徴
とする請求項１または２記載の湿式排煙脱硫装置の吸収
塔。4. The wet process according to claim 1, wherein the distance between the nozzle tip of the upward spray nozzle of the spray header and the downward spray nozzle of the upper spray header facing the spray header is 1 m or more. Absorption tower for flue gas desulfurization equipment.
に吸収液スラリの噴霧を開始させる機構を備えたことを
特徴とする請求項１または２記載の湿式排煙脱硫装置の
吸収塔。5. The absorption tower of a wet flue gas desulfurization apparatus according to claim 1, further comprising a mechanism for starting the spraying of the absorbing liquid slurry from the upward spray nozzle at the time of starting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26711694A JP3338209B2 (en) | 1994-10-31 | 1994-10-31 | Absorption tower of wet flue gas desulfurization unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26711694A JP3338209B2 (en) | 1994-10-31 | 1994-10-31 | Absorption tower of wet flue gas desulfurization unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08126813A true JPH08126813A (en) | 1996-05-21 |
| JP3338209B2 JP3338209B2 (en) | 2002-10-28 |
Family
ID=17440294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26711694A Expired - Fee Related JP3338209B2 (en) | 1994-10-31 | 1994-10-31 | Absorption tower of wet flue gas desulfurization unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3338209B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101277569B1 (en) * | 2011-06-20 | 2013-06-21 | 케이씨코트렐 주식회사 | Wet scrubber with multi-stage spray structure |
| CN106730970A (en) * | 2017-03-22 | 2017-05-31 | 中国石油大学(华东) | A kind of dual-flow tray takes the decompression tower internals of thermal coupling with spray |
| CN110882618A (en) * | 2018-09-10 | 2020-03-17 | 黄骅市鑫通机械设备有限公司 | Double-tower desulfurization dust-removing equipment |
| CN114471111A (en) * | 2020-10-23 | 2022-05-13 | 中国石油化工股份有限公司 | Claus hydrogenation tail gas wet oxidation pre-desulfurization device and method |
-
1994
- 1994-10-31 JP JP26711694A patent/JP3338209B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101277569B1 (en) * | 2011-06-20 | 2013-06-21 | 케이씨코트렐 주식회사 | Wet scrubber with multi-stage spray structure |
| CN106730970A (en) * | 2017-03-22 | 2017-05-31 | 中国石油大学(华东) | A kind of dual-flow tray takes the decompression tower internals of thermal coupling with spray |
| CN106730970B (en) * | 2017-03-22 | 2023-11-21 | 中国石油大学(华东) | Vacuum tower internal part of heat-taking coupling through-flow column plate and spraying |
| CN110882618A (en) * | 2018-09-10 | 2020-03-17 | 黄骅市鑫通机械设备有限公司 | Double-tower desulfurization dust-removing equipment |
| CN114471111A (en) * | 2020-10-23 | 2022-05-13 | 中国石油化工股份有限公司 | Claus hydrogenation tail gas wet oxidation pre-desulfurization device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3338209B2 (en) | 2002-10-28 |
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