JPH0251651B2 - - Google Patents
Info
- Publication number
- JPH0251651B2 JPH0251651B2 JP62052388A JP5238887A JPH0251651B2 JP H0251651 B2 JPH0251651 B2 JP H0251651B2 JP 62052388 A JP62052388 A JP 62052388A JP 5238887 A JP5238887 A JP 5238887A JP H0251651 B2 JPH0251651 B2 JP H0251651B2
- Authority
- JP
- Japan
- Prior art keywords
- desulfurization
- exhaust gas
- tower
- absorption tower
- sulfur oxides
- 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.)
- Expired - Lifetime
Links
- 238000006477 desulfuration reaction Methods 0.000 claims description 49
- 230000023556 desulfurization Effects 0.000 claims description 49
- 238000010521 absorption reaction Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 21
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 17
- 239000008188 pellet Substances 0.000 claims description 16
- 229910052815 sulfur oxide Inorganic materials 0.000 claims description 16
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 15
- 239000000347 magnesium hydroxide Substances 0.000 claims description 15
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 15
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 230000003009 desulfurizing effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 24
- 230000000694 effects Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 229910019440 Mg(OH) Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- LPHFLPKXBKBHRW-UHFFFAOYSA-L magnesium;hydrogen sulfite Chemical compound [Mg+2].OS([O-])=O.OS([O-])=O LPHFLPKXBKBHRW-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は亜硫酸ガスなどの硫黄酸化物を含む
排ガスの脱硫方法と脱硫装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a desulfurization method and a desulfurization apparatus for exhaust gas containing sulfur oxides such as sulfur dioxide gas.
硫黄酸化物を含む排ガスの脱硫剤としては、従
来、水酸化ナトリウムや水酸化アンモニウムの溶
液か、あるいは水酸化カルシウム〔Ca（OH）2〕
や水酸化マグネシウム〔Mg（OH）2〕などの水ス
ラリーが用いられている。
Conventionally, solutions of sodium hydroxide, ammonium hydroxide, or calcium hydroxide [Ca(OH) 2 ] have been used as desulfurizing agents for exhaust gas containing sulfur oxides.
A water slurry of magnesium hydroxide [Mg(OH) 2 ] is used.
これらの脱硫剤を用いた脱硫方法は、吸収塔内
に上記排ガスを導いて硫黄酸化物を吸収させ、こ
の吸収後の脱硫液を塔下部の循環槽に流出させ
て、ここで脱硫剤を補給したうえで塔上部より再
び吸収塔に流入させる循環方式をとつており、循
環液中の亜硫酸塩ないし硫酸塩が所定濃度となつ
た時点でその一部を系外に連続的に排出するよう
にしている。 In the desulfurization method using these desulfurization agents, the above exhaust gas is introduced into an absorption tower to absorb sulfur oxides, and the desulfurization liquid after this absorption is discharged to a circulation tank at the bottom of the tower, where the desulfurization agent is replenished. After that, a circulation system is adopted in which the circulating fluid is flowed back into the absorption tower from the top of the tower, and once the sulfite or sulfate in the circulating fluid reaches a predetermined concentration, a portion of it is continuously discharged outside the system. ing.
ところで、このような脱硫方法においては、脱
硫剤の補給量が不足すると脱硫効果が低下し、ま
た過多となると経済的に不利となるばかりか、脱
硫液のPHが高くなりすぎて排ガス中の炭酸ガスな
どが吸収されやすくなり、そのぶん脱硫効果も悪
くなる。したがつて、脱硫剤の補給量は適正に調
整される必要があり、一般には前記の循環槽と脱
硫剤補給系との間にPH調整器を付設して、脱硫液
のPHが適当、たとえば約６〜７程度となるように
自動制御している。 By the way, in such a desulfurization method, if the amount of desulfurization agent supplied is insufficient, the desulfurization effect will decrease, and if it is too much, it will not only be economically disadvantageous, but also cause the pH of the desulfurization solution to become too high, causing carbon dioxide in the exhaust gas to increase. Gas etc. are easily absorbed, and the desulfurization effect becomes worse accordingly. Therefore, it is necessary to appropriately adjust the amount of desulfurization agent replenishment, and generally a PH regulator is installed between the circulation tank and the desulfurization agent replenishment system to ensure that the desulfurization liquid has an appropriate pH, e.g. It is automatically controlled to be about 6 to 7.
しかるに、PH調整器は高価なために脱硫コスト
が高くつき、また脱硫液によつてその検出部が汚
損されることがあるためPHの調整ミスをおこす心
配がある。また、上記ミスを防ぐために汚損部を
しばしば点検し掃除しなければならないが、この
作業は結構面倒である。そして、このような問題
は、脱硫装置が小容量のものである場合に、特に
無視できないものとなる。
However, since the PH regulator is expensive, the desulfurization cost is high, and the detection part of the PH regulator may be contaminated by the desulfurizing liquid, so there is a risk of making a mistake in adjusting the PH. Furthermore, in order to prevent the above-mentioned mistakes, soiled parts must be frequently inspected and cleaned, but this work is quite troublesome. Such problems cannot be ignored, especially when the desulfurization equipment has a small capacity.
したがつて、この発明は、上記従来の問題点を
本質的に解決するために、PH調整器を必要としな
い脱硫方法とその装置とを提供することを目的と
している。 Therefore, in order to essentially solve the above-mentioned conventional problems, it is an object of the present invention to provide a desulfurization method and an apparatus thereof that do not require a PH regulator.
この発明者らは、上記の目的を達成するために
鋭意検討した結果、脱硫剤として水酸化マグネシ
ウムのペツト状物を用いることにより、PH調整器
を使用しなくても脱硫液のPHを約６〜８程度に容
易に調整でき、またこれによつて前記従来の脱硫
剤を用いたものに比し遜色のない良好な脱硫効果
が得られるものであることを知り、この発明を完
成するに至つた。
As a result of intensive studies to achieve the above object, the inventors found that by using magnesium hydroxide pellets as a desulfurizing agent, the pH of the desulfurizing liquid could be adjusted to about 6 without using a pH regulator. It was discovered that the desulfurization effect can be easily adjusted to about 8 to 8, and that a good desulfurization effect comparable to that using the conventional desulfurization agent can be obtained, and this led to the completion of this invention. Ivy.
すなわち、この発明の第１は、硫黄酸化物を含
む排ガスの脱硫剤として水酸化マグネシウムのペ
レツト状物を用いることを特徴とする排ガスの脱
硫方法に係るものであり、この発明の第２は、硫
黄酸化物を含む排ガスを導く吸収塔と、この吸収
塔から流出する脱硫液を吸収塔に再び流入させる
ための循環経路に組み込まれた水酸化マグネシウ
ムのペレツト状物を充填した反応塔とを備えてな
ることを特徴とする排ガスの脱硫装置に係るもの
である。 That is, the first aspect of the present invention relates to a method for desulfurizing exhaust gas characterized by using pellets of magnesium hydroxide as a desulfurizing agent for exhaust gas containing sulfur oxides, and the second aspect of the present invention is: Equipped with an absorption tower for introducing exhaust gas containing sulfur oxides, and a reaction tower filled with magnesium hydroxide pellets incorporated into a circulation path for allowing the desulfurization liquid flowing out from the absorption tower to flow back into the absorption tower. The present invention relates to an exhaust gas desulfurization device characterized by:
以下、この発明の排ガスの脱硫方法と脱硫装置
とに関し、図面を参考にして説明する。
Hereinafter, the exhaust gas desulfurization method and desulfurization apparatus of the present invention will be explained with reference to the drawings.
図中、１は硫黄酸化物を含む排ガスを導く吸収
塔、２は上記吸収塔１の下部から流出する硫黄酸
化物を吸収した脱硫液をためる循環槽、３は上記
脱硫液の一部を系外へ排出するとともにその一部
を吸収塔１に塔上部よりパイプ４を介して再び流
入させるためのポンププであり、上記循環槽２、
ポンプ３およびパイプ４によつて循環経路５が構
成されている。６は系外に排出される脱硫液の量
に応じて循環槽２に水を補給するための給水槽で
ある。 In the figure, 1 is an absorption tower that guides exhaust gas containing sulfur oxides, 2 is a circulation tank that stores the desulfurization liquid that has absorbed sulfur oxides flowing out from the lower part of the absorption tower 1, and 3 is a circulation tank that stores a part of the desulfurization liquid. This is a pump for discharging the water to the outside and causing a part of it to flow back into the absorption tower 1 from the upper part of the tower via the pipe 4, and the above-mentioned circulation tank 2,
A circulation path 5 is constituted by the pump 3 and the pipe 4. 6 is a water supply tank for replenishing water to the circulation tank 2 according to the amount of desulfurization liquid discharged outside the system.
７は上記の循環系路５に組み込まれた反応塔
で、下部に金網が敷設されその上に水酸化マグネ
シウムのペレツト状物が充填されているとともに
上部が開放状態となつており、下部入口から循環
槽２の脱硫液の一部を導き、上部出口から流出す
る上記脱硫液を再び循環槽２に戻す構成となつて
いる。上記のペレツト状物は、たとえば水酸化マ
グネシウムの粉末をパン型造粒機などを用いて水
または水に適宜の糊を加えた付着剤で直径が約２
〜６mm程度の大きさに造粒し乾燥することによ
り、つくられたものである。 Reference numeral 7 denotes a reaction tower incorporated in the above-mentioned circulation system path 5. A wire mesh is laid at the bottom, and magnesium hydroxide pellets are filled on top of the wire mesh, and the top is open, so that water can flow from the bottom inlet. A part of the desulfurization liquid in the circulation tank 2 is guided, and the desulfurization liquid flowing out from the upper outlet is returned to the circulation tank 2 again. The above pellets can be made by using a pan-type granulator to prepare magnesium hydroxide powder with water or an adhesive with an appropriate glue added to water to a diameter of about 2 mm.
It is made by granulating it to a size of ~6 mm and drying it.
上記構成の装置において、重油たき燃焼炉やボ
イラーなどの排ガス発生炉８から排出される亜硫
酸ガスなどの硫黄酸化物を含む排ガスを吸収塔１
に導くと、排ガス中の硫黄酸化物は脱硫液に吸収
され、この液は塔下部の循環槽２に流出するとと
もに、ポンプ３によつてパイプ４を介して再び塔
上部に流入される。その際、脱硫液の一部は反応
塔７に導かれ、ここで水酸化マグネシウムとの反
応がおこつたのち、再び循環槽２に戻される。 In the apparatus configured as described above, exhaust gas containing sulfur oxides such as sulfur dioxide gas discharged from an exhaust gas generating furnace 8 such as a heavy oil-fired combustion furnace or a boiler is transferred to an absorption tower 1.
, the sulfur oxides in the exhaust gas are absorbed by the desulfurization liquid, which flows out into the circulation tank 2 at the bottom of the tower and is again flowed into the upper part of the tower via the pipe 4 by the pump 3. At this time, a part of the desulfurization liquid is led to the reaction tower 7, where it undergoes a reaction with magnesium hydroxide, and then returned to the circulation tank 2 again.
すなわち、反応塔７に充填された水酸化マグネ
シウムのペレツト状物は液中で安定であつて容易
に溶解しないが、ごく僅かは溶解するため、この
溶解成分が脱硫液との反応に関与する。つまり、
上記ペレツト状物から必要最小限のアルカリが逐
次的に供給され、脱硫反応が継続的に実施される
ことになる。 That is, the magnesium hydroxide pellets filled in the reaction tower 7 are stable in the liquid and do not dissolve easily, but since a very small amount dissolves, this dissolved component participates in the reaction with the desulfurization liquid. In other words,
The necessary minimum amount of alkali is sequentially supplied from the pellets, and the desulfurization reaction is carried out continuously.
このため、反応塔７に導く脱硫液の流量を適当
に設定すれば、反応塔７の下部入口において脱硫
液のPHは約６〜７程度に、また上部出口において
約７〜８程度に自然に調整され、従来のようなPH
調整器が全く不要となるのである。 Therefore, if the flow rate of the desulfurization liquid introduced into the reaction tower 7 is appropriately set, the pH of the desulfurization liquid at the lower inlet of the reaction tower 7 will naturally be about 6 to 7, and at the upper outlet to about 7 to 8. Adjusted and conventional PH
This eliminates the need for a regulator at all.
なお、脱硫液の反応について付言すれば、吸収
塔１内では主としてつぎの反応式(1)によつて硫黄
酸化物が吸収され、また反応塔７内では主として
つぎの反応式(2)によつて上記吸収後の反応生成物
である重亜硫酸マグネシウム〔Mg（HSO3）2〕が
硫酸マグネシウム〔MgSO3〕に変換され、これ
が吸収塔１に循環されて上記反応式(1)に基づく硫
黄酸化物の吸収に寄与するものである。 In addition, regarding the reaction of the desulfurization liquid, sulfur oxides are mainly absorbed in the absorption tower 1 according to the following reaction formula (1), and in the reaction tower 7 mainly according to the following reaction formula (2). Then, the reaction product after the above absorption, magnesium bisulfite [Mg(HSO 3 ) 2 ], is converted to magnesium sulfate [MgSO 3 ], which is circulated to the absorption tower 1 and undergoes sulfur oxidation based on the above reaction formula (1). It contributes to the absorption of substances.
SO2＋MgSO3＋H2O
→Mg（HSO3）2 …(1)
Mg（HSO3）2＋Mg（OH）2
→2MgSO3＋2H2O …(2)
このようにして循環液中の亜硫酸塩ないし硫酸
塩の濃度が所定濃度、たとえば約５〜20重量％程
度に達した時点で、その一部を系外に排出する。
このような脱硫処理により、排ガス中の硫黄酸化
物はたとえば吸収塔１の入口で100〜1000ppm程
度のものであれば塔出口で数ppm以下におとすこ
とができ、この脱硫効果は前記反応塔７に充填さ
れた水酸化マグネシウムのペレツト状物が充分に
存在する限り、長期的に持続する。すなわち、上
記ペレツト状物は継続的に少しづつ溶解する結
果、時間の経過とともに充填高さが徐々におちて
くるが、初期の20％程度までは良好な脱硫効果を
発揮し、それに至るまではかなりの時間を要する
ため、実用上支障なく長期運転することができる
のである。 SO 2 +MgSO 3 +H 2 O →Mg(HSO 3 ) 2 …(1) Mg(HSO 3 ) 2 +Mg(OH) 2 →2MgSO 3 +2H 2 O …(2) In this way, sulfites or When the concentration of sulfate reaches a predetermined concentration, for example, about 5 to 20% by weight, a portion of it is discharged from the system.
By such desulfurization treatment, the sulfur oxides in the exhaust gas can be reduced from about 100 to 1000 ppm at the inlet of the absorption tower 1 to several ppm or less at the tower outlet, and this desulfurization effect can be reduced to several ppm or less at the tower exit. It lasts for a long time as long as there are enough magnesium hydroxide pellets packed in it. In other words, as a result of the above-mentioned pellet-like material continuously dissolving little by little, the filling height gradually decreases over time, but it exhibits a good desulfurization effect up to about 20% of the initial level, and until that point, the filling height gradually decreases over time. Since it takes a considerable amount of time, it can be operated for a long time without any practical problems.
このように、この発明においては、水酸化マグ
ネシウムのペレツト状物が水酸化ナトリウム、炭
酸ナトリウム、炭酸アンモニウムなどのペレツト
状物と異なつて水に溶解しにくく、脱硫反応に必
要な最小限のアルカリを供給するという性質を有
していることから、この性質を排ガス脱硫用に利
用したものである。なお、前記脱硫装置は上記利
用のひとつの形態であつて、他に任意の変更が可
能となることはいうまでもない。また、上記水酸
化マグネシウムのペレツト状物は水酸化カルシウ
ムなどのペレツト状物と異なつて硫黄酸化物との
反応生成物が反応塔７や吸収塔１内でスケーリン
グしないという利点があり、この点からも好まし
いものである。 In this way, in this invention, magnesium hydroxide pellets are difficult to dissolve in water, unlike pellets of sodium hydroxide, sodium carbonate, ammonium carbonate, etc., and can consume the minimum amount of alkali necessary for the desulfurization reaction. Since it has the property of supplying gas, this property is utilized for exhaust gas desulfurization. Note that the desulfurization device is one form of the above usage, and it goes without saying that other arbitrary changes are possible. Furthermore, unlike pellets of calcium hydroxide, the magnesium hydroxide pellets have the advantage that the reaction product with sulfur oxide does not scale in the reaction tower 7 or absorption tower 1. is also preferable.
以上のように、この発明によれば、脱硫剤とし
て水酸化マグネシウムのペレツト状物を用いたこ
とにより、PH調整器を必要としない、したがつて
安価でかつ操作的に有利な排ガス脱硫方法とその
装置を提供でき、これら方法および装置によつて
排ガス中の硫黄酸化物を従来の方法に比し遜色な
く効率的に除去できるという格別の効果が奏し得
られるものである。
As described above, according to the present invention, by using pellets of magnesium hydroxide as a desulfurizing agent, a PH regulator is not required, and therefore an inexpensive and operationally advantageous exhaust gas desulfurization method can be achieved. It is possible to provide such an apparatus, and by these methods and apparatuses, it is possible to achieve a special effect in that sulfur oxides in exhaust gas can be removed as efficiently as compared to conventional methods.
〔実施例〕
以下に、この発明の実施例を記載してより具体
的に説明する。[Examples] Below, examples of the present invention will be described in more detail.
実施例
図面に示す装置を用いて、以下の要領で排ガス
の脱硫処理を行つた。なお、反応塔７はその直径
が50mm、高さが1000mmであり、内部に直径２〜６
mmの水酸化マグネシウムのペレツト状物を塔下部
から800mmの高さまで充填したものを用いた。Example Using the apparatus shown in the drawings, exhaust gas was desulfurized in the following manner. The reaction tower 7 has a diameter of 50 mm and a height of 1000 mm, and has a diameter of 2 to 6 mm inside.
The column was filled with pellets of magnesium hydroxide of 800 mm in diameter from the bottom of the column.
発生熱量９万Kcal／時間のＡ重油の燃焼炉か
らなる排ガス発生炉８より排ガス（硫黄酸化物
150ppm、酸素含有率５％）を９／時間の量で
吸収塔１に導き、ここに塔上部から循環槽２の脱
硫液を20／分の速度で流入させ、かつ反応塔７
への脱硫液の流速を４〜７／分の範囲に調整
し、系外への脱硫液の排出量を０にして24時間継
続して運転を行つた。 Exhaust gas (sulfur oxides
150 ppm, oxygen content 5%) is introduced into the absorption tower 1 at a rate of 9/hour, into which the desulfurization liquid from the circulation tank 2 is introduced from the top of the tower at a rate of 20/minute, and into the reaction tower 7.
The flow rate of the desulfurizing liquid was adjusted to within the range of 4 to 7 minutes, and the operation was continued for 24 hours with the amount of desulfurizing liquid discharged outside the system to zero.
その結果、反応塔７の下部入口で脱硫液のPHが
平均約6.5、上部出口で平均約8.0に維持され、吸
収塔１の上部から排出される排ガスの硫黄酸化物
は２〜6ppmとなり、効率良く安定して脱硫処理
を行えることが判つた。 As a result, the pH of the desulfurization liquid at the lower inlet of the reaction tower 7 is maintained at an average of about 6.5 and at the upper outlet at an average of about 8.0, and the sulfur oxides in the exhaust gas discharged from the upper part of the absorption tower 1 are 2 to 6 ppm, resulting in efficiency. It was found that desulfurization treatment can be carried out in a good and stable manner.
図面はこの発明の脱硫装置の一例を示す概略図
である。
１……吸収塔、５……循環経路、７……反応
塔。
The drawing is a schematic diagram showing an example of the desulfurization apparatus of the present invention. 1... Absorption tower, 5... Circulation route, 7... Reaction tower.
Claims (1)
化マグネシウムのペレツト状物を用いることを特
徴とする排ガスの脱硫方法。 ２ 硫黄酸化物を含む排ガスを導く吸収塔と、こ
の吸収塔から流出する脱硫液を吸収塔に再び流入
させるための循環経路に組み込まれた水酸化マグ
ネシウムのペレツト状物を充填した反応塔とを備
えてなることを特徴とする排ガスの脱硫装置。[Scope of Claims] 1. A method for desulfurizing exhaust gas, characterized in that pellets of magnesium hydroxide are used as a desulfurizing agent for exhaust gas containing sulfur oxides. 2. An absorption tower for introducing exhaust gas containing sulfur oxides, and a reaction tower filled with magnesium hydroxide pellets incorporated into a circulation path for allowing the desulfurization liquid flowing out from the absorption tower to flow back into the absorption tower. An exhaust gas desulfurization device characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62052388A JPS63218238A (en) | 1987-03-07 | 1987-03-07 | Method and apparatus for desulfurizing exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62052388A JPS63218238A (en) | 1987-03-07 | 1987-03-07 | Method and apparatus for desulfurizing exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63218238A JPS63218238A (en) | 1988-09-12 |
| JPH0251651B2 true JPH0251651B2 (en) | 1990-11-08 |
Family
ID=12913420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62052388A Granted JPS63218238A (en) | 1987-03-07 | 1987-03-07 | Method and apparatus for desulfurizing exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63218238A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03278814A (en) * | 1990-03-28 | 1991-12-10 | F K K Giken Kk | Acidic gas treating device |
-
1987
- 1987-03-07 JP JP62052388A patent/JPS63218238A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63218238A (en) | 1988-09-12 |
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