JPH07100331A - Flue gas desulfurizing method - Google Patents
Flue gas desulfurizing methodInfo
- Publication number
- JPH07100331A JPH07100331A JP5247955A JP24795593A JPH07100331A JP H07100331 A JPH07100331 A JP H07100331A JP 5247955 A JP5247955 A JP 5247955A JP 24795593 A JP24795593 A JP 24795593A JP H07100331 A JPH07100331 A JP H07100331A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- gas
- absorption
- flue gas
- absorbing
- 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.)
- Withdrawn
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000003546 flue gas Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003009 desulfurizing effect Effects 0.000 title abstract 3
- 239000007788 liquid Substances 0.000 claims abstract description 95
- 238000010521 absorption reaction Methods 0.000 claims abstract description 49
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 21
- 230000023556 desulfurization Effects 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 18
- 230000002745 absorbent Effects 0.000 abstract description 18
- 239000002250 absorbent Substances 0.000 abstract description 18
- 239000002912 waste gas Substances 0.000 abstract 2
- 239000007921 spray Substances 0.000 description 7
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 6
- 230000004043 responsiveness Effects 0.000 description 5
- 229910052815 sulfur oxide Inorganic materials 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 4
- 239000000347 magnesium hydroxide Substances 0.000 description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 3
- 239000008235 industrial water Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、排煙脱硫方法に関し、
石炭、重油等を燃料とする加熱炉、ボイラー、ごみ焼却
炉等からの硫黄酸化物を含む排ガスの処理に利用でき
る。BACKGROUND OF THE INVENTION The present invention relates to a flue gas desulfurization method,
It can be used to treat exhaust gas containing sulfur oxides from heating furnaces that use coal, heavy oil, etc. as fuel, boilers, refuse incinerators, and the like.
【０００２】[0002]
【背景技術及び発明が解決しようとする課題】従来、吸
収塔内の気液接触部において、硫黄酸化物（SOX ）を含
む排ガスと水酸化マグネシウム等を含む吸収液とを向流
接触又は並流接触させることにより排ガスの脱硫を行う
排煙脱硫方法が知られている（特開昭63-156521 号公
報、特開平３-143527 号公報、特開平３-275123 号公
報）。このような排ガスの脱硫の際、前記吸収液のｐＨ
は、硫黄酸化物の吸収に適した値に調整されている。こ
のｐＨ調整のため、吸収塔の液溜め部から吸収液のスプ
レーノズルに到る循環ラインの途中に、吸収液をｐＨ検
出部に導く分岐管を接続し、このｐＨ検出部で検知した
ｐＨ値に基づいて前記吸収液のｐＨを調整していた。こ
のようなｐＨ調整システムによれば、ｐＨ検出用の吸収
液を取り出し易いという長所を有する。BACKGROUND ART [0002] Conventionally, in a gas-liquid contact section in an absorption tower, an exhaust gas containing sulfur oxide (SO X ) and an absorbing solution containing magnesium hydroxide or the like are subjected to countercurrent contact or parallel flow. A flue gas desulfurization method in which exhaust gas is desulfurized by flowing contact is known (JP-A-63-156521, JP-A-3-143527, and JP-A-3-275123). During desulfurization of such exhaust gas, the pH of the absorption liquid
Is adjusted to a value suitable for absorbing sulfur oxides. For this pH adjustment, a branch pipe for guiding the absorption liquid to the pH detection unit is connected in the middle of the circulation line from the liquid reservoir of the absorption tower to the spray nozzle of the absorption liquid, and the pH value detected by this pH detection unit is connected. The pH of the absorption liquid was adjusted based on the above. Such a pH adjusting system has an advantage that it is easy to take out the absorption liquid for pH detection.
【０００３】しかし、前記ｐＨ調整システムによると、
液溜め部の容量が大きいことに伴ってこの液溜め部での
吸収液の滞留時間が大きくなるため、燃料が切り替わっ
た時のような条件変化時にｐＨの検知に時間的遅れが生
じて応答性が悪くなるという問題点があった。なお、液
溜め部における吸収液の滞留時間を低減させるようにし
た系では、応答感度を上げる必要があるが、そのために
は検知信号の応答感度の改善が要求されることになる。
そこで、本発明は、吸収塔内の気液接触部における吸収
液のｐＨを応答性良く調整することができる排煙脱硫方
法を提供することを目的とする。However, according to the pH adjusting system,
Since the retention time of the absorbing liquid in this liquid reservoir increases as the capacity of the liquid reservoir increases, there is a time delay in detecting the pH when the conditions change such as when the fuel is switched, and the responsiveness is improved. There was a problem that was worse. It should be noted that in a system in which the retention time of the absorbing liquid in the liquid reservoir is reduced, it is necessary to increase the response sensitivity, but for that purpose, improvement of the response sensitivity of the detection signal is required.
Therefore, it is an object of the present invention to provide a flue gas desulfurization method capable of adjusting the pH of the absorbing liquid in the gas-liquid contact portion in the absorption tower with good responsiveness.
【０００４】[0004]
【課題を解決するための手段】本発明は、吸収塔内の気
液接触部において排ガスと吸収液とを接触させることに
より脱硫を行う排煙脱硫方法において、肺ガスを吸収し
た前記吸収液を前記吸収塔の液溜め部に落下するまでの
間に直接採取し、この吸収液をｐＨ検出部に導いて前記
吸収液のｐＨ値を検知し、このｐＨ値に基づいて前記気
液接触部における吸収液のｐＨを調整することを特徴と
する。前記気液接触部における排ガスと吸収液との接触
は、向流接触又は並流接触のいずれでもよい。前記吸収
塔の液溜め部に落下するまでの間には、気液接触部と直
接接する位置及び気液接触部と液溜め部の中間の位置を
含む。The present invention provides a flue gas desulfurization method in which desulfurization is carried out by contacting exhaust gas with an absorbent at a gas-liquid contact portion in an absorption tower, wherein the absorbent having absorbed lung gas is It is directly collected until it falls into the liquid storage section of the absorption tower, the absorption solution is guided to a pH detection section to detect the pH value of the absorption solution, and the pH value of the gas-liquid contact section is detected based on this pH value. It is characterized in that the pH of the absorption liquid is adjusted. The contact between the exhaust gas and the absorbing liquid in the gas-liquid contact portion may be countercurrent contact or cocurrent contact. Before falling into the liquid reservoir of the absorption tower, the position directly in contact with the gas-liquid contact part and the position intermediate between the gas-liquid contact part and the liquid reservoir are included.
【０００５】前記吸収液用の吸収剤としては、アルカリ
及びアルカリ土類の水酸化物（例えば、水酸化ナトリウ
ム、水酸化カリウム、水酸化マグネシウム、水酸化カル
シウム等）、これらの酸化物（例えば、酸化マグネシウ
ム、酸化カルシウム等）等を使用できる。これらの中
で、水酸化マグネシウム、酸化マグネシウム等のマグネ
シウム化合物は経済性の面から特に好適である。As the absorbent for the absorbent, alkali and alkaline earth hydroxides (for example, sodium hydroxide, potassium hydroxide, magnesium hydroxide, calcium hydroxide, etc.) and these oxides (for example, Magnesium oxide, calcium oxide, etc.) can be used. Among these, magnesium compounds such as magnesium hydroxide and magnesium oxide are particularly preferable in terms of economy.
【０００６】前記気液接触部における吸収液のｐＨは、
5.5 〜7.0 に調整した場合に硫黄酸化物の除去効果が最
も高まる。このように、気液接触部の下側より排ガスを
吸収した吸収液をｐＨ検出部に直接導くようにしたた
め、気液接触部における吸収液のｐＨ値を時間的遅れの
ほぼない状態で吸収液のｐＨ値を検知することができ
る。これにより、燃料が切り替わった時のような条件変
化が合った場合でも、気液接触部における吸収液のｐＨ
を応答性良く調整することが可能になる。The pH of the absorbing liquid at the gas-liquid contact portion is
When adjusted to 5.5 to 7.0, the effect of removing sulfur oxides is maximized. In this way, since the absorption liquid that has absorbed the exhaust gas from the lower side of the gas-liquid contact portion is directly guided to the pH detection portion, the pH value of the absorption liquid in the gas-liquid contact portion can be adjusted with almost no time delay. The pH value of can be detected. As a result, the pH of the absorbing liquid at the gas-liquid contacting part can be changed even when the conditions change such as when the fuel is switched.
Can be adjusted with good responsiveness.
【０００７】[0007]
【実施例】先ず、図１を参照して本実施例に係る排煙脱
硫方法において使用する排煙脱硫装置11の構成を説明す
る。この排煙脱硫装置11は、排ガスの脱硫を行う吸収塔
12、吸収塔12の液溜め部13から吸収塔12内のスプレーノ
ズル14に到る吸収液15の循環ライン16、この循環ライン
16の途中に接続された吸収液15の供給ライン17及び排水
ライン18、吸収塔12の気液接触部19の少し下側から吸収
塔12外に取り出されて吸収塔12に戻る吸収液15のｐＨ検
出ライン21、吸収塔12と接続された工業用水の供給ライ
ン22及び酸化空気の供給ライン23等を備えて構成され
る。EXAMPLE First, the structure of a flue gas desulfurization apparatus 11 used in the flue gas desulfurization method according to this embodiment will be described with reference to FIG. This flue gas desulfurization device 11 is an absorption tower that desulfurizes exhaust gas.
12, the circulation line 16 of the absorption liquid 15 from the liquid reservoir 13 of the absorption tower 12 to the spray nozzle 14 in the absorption tower 12, this circulation line
The supply line 17 and the drain line 18 of the absorbent 15 connected in the middle of 16 and the absorbent 15 that is taken out of the absorber 12 from slightly below the gas-liquid contact portion 19 of the absorber 12 and returns to the absorber 12. It comprises a pH detection line 21, an industrial water supply line 22 connected to the absorption tower 12, an oxidizing air supply line 23, and the like.
【０００８】前記吸収液の供給ライン17は、この実施例
のように前記循環ライン16又は吸収塔12の液溜め部13の
いずれかと接触されていればよいが、排水ライン18近傍
でスプレーノズル14側の循環ライン16と接続されている
ことが望ましい。前記吸収塔12は、その内部の上方に設
けられたミストエリミネータ24、このミストエリミネー
タ24の下方に設けられたスプレーノズル14、このスプレ
ーノズル14の下方に設けられた気液接触部19、液溜め部
13、気液接触部19と液溜め部13間の吸収塔12壁面に形成
された排ガスの供給口25及び前記液溜め部13内に酸化空
気の供給ライン23と接続されて設けられた酸化空気用ノ
ズル26を有している。なお、この酸化空気用ノズル26
は、必ずしも設ける必要はなく、必要に応じて設ければ
よい。The absorption liquid supply line 17 may be in contact with either the circulation line 16 or the liquid reservoir 13 of the absorption tower 12 as in this embodiment, but the spray nozzle 14 near the drain line 18 It is desirable to be connected to the circulation line 16 on the side. The absorption tower 12 is a mist eliminator 24 provided above the inside thereof, a spray nozzle 14 provided below the mist eliminator 24, a gas-liquid contact portion 19 provided below the spray nozzle 14, and a liquid reservoir. Department
13, an exhaust gas supply port 25 formed on the wall surface of the absorption tower 12 between the gas-liquid contact portion 19 and the liquid storage portion 13 and oxidizing air provided in the liquid storage portion 13 by being connected to a supply line 23 for oxidizing air It has a nozzle 26 for use. Incidentally, this oxidizing air nozzle 26
Need not necessarily be provided, and may be provided as needed.
【０００９】前記吸収液の供給ライン17と工業用水の供
給ライン22の途中には、それぞれ調節弁27,30 が設けら
れている。前記循環ライン16の途中には、ポンプ20が設
けられている。また、吸収塔12の前記液溜め部13には、
液面計28が接続されている。図２にも示すように、前記
吸収液15のｐＨ検出ライン21は、前記気液接触部19の少
し下に吸収液15の受け部29が取り付けられ、この受け部
29と連通した吸収塔12外の管31の途中にｐＨ検出部32が
取り付けられたものである。この受け部29の上面には、
固形分除去のためのフィルター33が取り付けられてい
る。図示の場合、ｐＨ検出部32を吸収液15の抜き出し側
のｐＨ検出ライン21上部に設けているが、一般的には吸
収液15の戻し側のｐＨ検出ライン21下部に設けた方が吸
収液15の滞留時間が短くなる。Control valves 27 and 30 are provided in the middle of the absorption liquid supply line 17 and the industrial water supply line 22, respectively. A pump 20 is provided in the middle of the circulation line 16. Further, in the liquid reservoir 13 of the absorption tower 12,
A liquid level gauge 28 is connected. As shown in FIG. 2, in the pH detection line 21 of the absorbing liquid 15, a receiving portion 29 for the absorbing liquid 15 is attached just below the gas-liquid contact portion 19, and the receiving portion 29 is provided.
The pH detection unit 32 is attached to the middle of a pipe 31 outside the absorption tower 12 communicating with 29. On the upper surface of this receiving portion 29,
A filter 33 for removing solids is attached. In the illustrated case, the pH detection unit 32 is provided above the pH detection line 21 on the extraction side of the absorption liquid 15, but it is generally better to provide it below the pH detection line 21 on the return side of the absorption liquid 15. 15 dwell time shortened.
【００１０】次に、この排煙脱硫装置11を使用した本実
施例に係る排煙脱硫方法を説明する。前記排ガスの供給
口25より吸収塔12内に供給された排ガスは、気液接触部
19において前記スプレーノズル14から散布された吸収液
15と向流接触して排ガス中の硫黄酸化物（SOX ）が吸収
除去される。脱硫された排ガスは、前記ミストエリミネ
ータ24を通って吸収塔12外に排出される。一方、硫黄酸
化物を吸収した吸収液15は、前記液溜め部13に留まる。
本実施例の場合、吸収液15中の吸収剤として、水酸化マ
グネシウムを使用している。液溜め部13に留まった吸収
液15は、前記ノズル26により曝気され、吸収液15中の亜
硫酸塩が酸化される。Next, a flue gas desulfurization method according to this embodiment using the flue gas desulfurization apparatus 11 will be described. The exhaust gas supplied into the absorption tower 12 through the exhaust gas supply port 25 is a gas-liquid contact part.
Absorbing liquid sprayed from the spray nozzle 14 in 19
It makes countercurrent contact with 15 and absorbs and removes sulfur oxides (SO x ) in the exhaust gas. The desulfurized exhaust gas passes through the mist eliminator 24 and is discharged to the outside of the absorption tower 12. On the other hand, the absorbing liquid 15 that has absorbed the sulfur oxides remains in the liquid reservoir 13.
In the case of this example, magnesium hydroxide is used as the absorbent in the absorbent 15. The absorbent 15 remaining in the liquid reservoir 13 is aerated by the nozzle 26, and the sulfite in the absorbent 15 is oxidized.
【００１１】液溜め部13の吸収液15は、前記循環ライン
16を通って前記スプレーノズル14に戻されて循環使用さ
れると共に、吸収液15の一部は前記排水ライン18から排
水される。この吸収塔12内における排ガスの脱硫中、気
液接触部19から降下した吸収液15は、その一部が前記受
け部29に採取され。ｐＨ検出ライン21を通ってｐＨ検出
部32に到り、ここで排ガスを吸収した前記吸収液15のｐ
Ｈが検知される。このｐＨ検出部32を通った吸収液15
は、ｐＨ検出ライン21を経てヘッド差により吸収塔12内
に再び戻される。The absorbing liquid 15 in the liquid reservoir 13 is the circulating line.
It is returned to the spray nozzle 14 through 16 to be circulated and used, and a part of the absorbing liquid 15 is drained from the drain line 18. During the desulfurization of the exhaust gas in the absorption tower 12, a part of the absorbing liquid 15 that descends from the gas-liquid contact portion 19 is collected in the receiving portion 29. After passing through the pH detection line 21, the pH detection unit 32 is reached, where the p of the absorbing liquid 15 that has absorbed the exhaust gas is
H is detected. Absorbing liquid 15 that has passed through the pH detection unit 32
Is returned to the absorption tower 12 again via the pH detection line 21 due to the head difference.
【００１２】そして、ｐＨ検出部32で検知されたｐＨ値
に基づき、前記気液接触部19における吸収液15のｐＨが
5.5 〜7.0 に維持されるように、供給ライン17の調節弁
27の開度が調節されて前記吸収液15の供給ライン17から
新たな吸収液15が前記循環ライン16に供給される。前記
液面計28は、液溜め部13の吸収液15の量を検知し、排水
等により減少した分の量の工業用水を前記調節弁30の開
閉によって補給している。Then, based on the pH value detected by the pH detecting unit 32, the pH of the absorbing liquid 15 in the gas-liquid contacting unit 19 is
Control valve in supply line 17 so that it is maintained between 5.5 and 7.0
The opening degree of 27 is adjusted, and a new absorption liquid 15 is supplied to the circulation line 16 from the supply line 17 of the absorption liquid 15. The liquid level gauge 28 detects the amount of the absorbing liquid 15 in the liquid reservoir 13 and replenishes the amount of industrial water reduced by drainage or the like by opening and closing the control valve 30.
【００１３】上記実施例に係る排煙脱硫方法によれば、
気液接触部19の直ぐ下にｐＨ検出ライン21を設け、この
ｐＨ検出ライン21に設けたｐＨ検出部32で吸収液15のｐ
Ｈを検知するようにしているため、吸収液15のｐＨ値を
時間的遅れのほぼない状態で検知することができる。こ
れにより、燃料が切り替わった時のような条件変化があ
った場合でも、気液接触部19における吸収液15のｐＨを
応答性良く調整することができる。また、従来の装置に
前記ｐＨ検出ライン21を設ければよく、構成が簡単であ
るから、装置的にも容易に実施できる。According to the flue gas desulfurization method according to the above embodiment,
A pH detection line 21 is provided immediately below the gas-liquid contact section 19, and the pH detection section 32 provided in this pH detection line 21 causes the absorption liquid 15 to reach p.
Since H is detected, the pH value of the absorbent 15 can be detected with almost no time delay. As a result, the pH of the absorbing liquid 15 in the gas-liquid contact portion 19 can be adjusted with good responsiveness even when there is a change in conditions such as when the fuel is switched. Further, since the pH detection line 21 may be provided in the conventional device and the structure is simple, the device can be easily implemented.
【００１４】なお、本発明を実施するための装置的構成
は、上記実施例に係るもの以外でも可能である。例え
ば、図３に示すようにｐＨ検出ライン21の途中にサンプ
ルボックス34を設け、このサンプルボックス34にｐＨ検
出部32を取り付けるようにしてもよい。このサンプルボ
ックス34内には、移動可能な溢流堰35が設置されてい
る。そして、吸収液15のスラリー濃度が高く、吸収剤の
素粒子がサンプルボックス34内に堆積するような場合に
は、この溢流堰35を動かしてこのような粗粒子を除去す
ることにより、ｐＨ検知を支障なく行うことができる。
また、前記実施例では、吸収液15の受け部29を気液接触
部19の少し下に取り付けたが、気液接触部19と直接接す
るようにして取り付けてもよい。The device-like structure for carrying out the present invention may be other than that according to the above embodiment. For example, as shown in FIG. 3, a sample box 34 may be provided in the middle of the pH detection line 21, and the pH detection unit 32 may be attached to the sample box 34. A movable overflow weir 35 is installed in the sample box 34. Then, when the slurry concentration of the absorbing liquid 15 is high and the elementary particles of the absorbent are deposited in the sample box 34, the overflow weir 35 is moved to remove such coarse particles, and The detection can be performed without any trouble.
Further, in the above-mentioned embodiment, the receiving portion 29 for the absorbing liquid 15 is attached slightly below the gas-liquid contact portion 19, but it may be attached so as to be in direct contact with the gas-liquid contact portion 19.
【００１５】[0015]
【発明の効果】本発明に係る排煙脱硫方法によれば、吸
収塔内の気液接触部における吸収液のｐＨを応答性良く
調整することができる。According to the flue gas desulfurization method of the present invention, the pH of the absorbing liquid in the gas-liquid contact portion in the absorption tower can be adjusted with good responsiveness.
【図１】本実施例に係る排煙脱硫方法において使用する
排煙脱硫装置の構成図である。FIG. 1 is a configuration diagram of a flue gas desulfurization apparatus used in a flue gas desulfurization method according to an embodiment.
【図２】本実施例に係るｐＨ検出ラインの要部拡大図で
ある。FIG. 2 is an enlarged view of a main part of the pH detection line according to the present embodiment.
【図３】他の実施例に係るｐＨ検出ラインの要部拡大図
である。FIG. 3 is an enlarged view of a main part of a pH detection line according to another embodiment.
11 排煙脱硫装置 12 吸収塔 13 液溜め部 15 吸収液 16 循環ライン 17 吸収液の供給ライン 19 気液接触部 21 ｐＨ検出ライン 29 吸収液の受け部 32 ｐＨ検出部 11 Flue gas desulfurization device 12 Absorption tower 13 Liquid storage section 15 Absorption solution 16 Circulation line 17 Absorption solution supply line 19 Gas-liquid contact section 21 pH detection line 29 Absorption solution reception section 32 pH detection section
───────────────────────────────────────────────────── 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 53/34 １２５ Ｑ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location B01D 53/34 125 Q
Claims (1)
吸収液とを接触させることにより脱硫を行う排煙脱硫方
法において、 排ガスを吸収した前記吸収液を前記吸収塔の液溜め部に
落下するまでの間に直接採取し、この吸収液をｐＨ検出
部に導いて前記吸収液のｐＨ値を検知し、このｐＨ値に
基づいて前記気液接触部における吸収液のｐＨを調整す
ることを特徴とする排煙脱硫方法。1. A flue gas desulfurization method in which desulfurization is performed by contacting an exhaust gas with an absorbing liquid in a gas-liquid contacting portion in an absorption tower, wherein the absorbing liquid absorbing the exhaust gas falls into a liquid storage portion of the absorbing tower. Until the absorption, the pH value of the absorption liquid is guided to the pH detection unit to detect the pH value of the absorption liquid, and the pH of the absorption liquid in the gas-liquid contact unit is adjusted based on the pH value. Characteristic flue gas desulfurization method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5247955A JPH07100331A (en) | 1993-10-04 | 1993-10-04 | Flue gas desulfurizing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5247955A JPH07100331A (en) | 1993-10-04 | 1993-10-04 | Flue gas desulfurizing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07100331A true JPH07100331A (en) | 1995-04-18 |
Family
ID=17171043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5247955A Withdrawn JPH07100331A (en) | 1993-10-04 | 1993-10-04 | Flue gas desulfurizing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07100331A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0884092A1 (en) * | 1997-06-13 | 1998-12-16 | Von Roll Umwelttechnik AG | Process for removing sulfur dioxide from an exhaust gas |
| CN110292844A (en) * | 2019-06-25 | 2019-10-01 | 四川省星船城水泥股份有限公司 | A kind of new dry process preheater kiln tail smoke-box |
-
1993
- 1993-10-04 JP JP5247955A patent/JPH07100331A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0884092A1 (en) * | 1997-06-13 | 1998-12-16 | Von Roll Umwelttechnik AG | Process for removing sulfur dioxide from an exhaust gas |
| CN110292844A (en) * | 2019-06-25 | 2019-10-01 | 四川省星船城水泥股份有限公司 | A kind of new dry process preheater kiln tail smoke-box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20001226 |