JPS6223537Y2 - - Google Patents
Info
- Publication number
- JPS6223537Y2 JPS6223537Y2 JP1983182195U JP18219583U JPS6223537Y2 JP S6223537 Y2 JPS6223537 Y2 JP S6223537Y2 JP 1983182195 U JP1983182195 U JP 1983182195U JP 18219583 U JP18219583 U JP 18219583U JP S6223537 Y2 JPS6223537 Y2 JP S6223537Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- tower
- chemical
- liquid
- chemical solution
- 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
Links
- 239000000126 substance Substances 0.000 claims description 39
- 239000007789 gas Substances 0.000 claims description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 36
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 30
- 238000004140 cleaning Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 17
- 239000010802 sludge Substances 0.000 claims description 13
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 12
- 239000012286 potassium permanganate Substances 0.000 claims description 8
- 230000001877 deodorizing effect Effects 0.000 claims description 7
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 6
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 238000004332 deodorization Methods 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 239000000243 solution Substances 0.000 description 25
- 238000005201 scrubbing Methods 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000372132 Hydrometridae Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- VDQVEACBQKUUSU-UHFFFAOYSA-M disodium;sulfanide Chemical compound [Na+].[Na+].[SH-] VDQVEACBQKUUSU-UHFFFAOYSA-M 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 229910001437 manganese ion Inorganic materials 0.000 description 1
- PMQJYWORJJEMQC-UHFFFAOYSA-N manganese;dihydrate Chemical compound O.O.[Mn] PMQJYWORJJEMQC-UHFFFAOYSA-N 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Description
本考案は、湿式ガス洗浄塔を用いた硫化水素等
の酸性悪臭ガスの薬液洗浄式脱臭装置に関するも
のである。さらに詳細に述べれば、苛性ソーダを
主成分とする薬液を用いて悪臭ガスを一次処理
し、処理後のガスをさらに過マンガン酸カリウム
を主成分とする薬液で二次処理することにより、
悪臭ガスを効果的に無臭化する装置に関するもの
である。
苛性ソーダ水溶液による悪臭ガスの洗浄は特に
硫化水素等の酸性ガスの吸引除去には有効である
が、該溶液を循環使用すれば、酸アルカリ中和反
応による生成物が循環薬液中に畜積され、次第に
悪臭ガスの除去効率が低下してくる。これを高い
除去効率に保つ為に、常に新らたに苛性ソーダを
循環薬液に添加しても高い除去効率を維持するこ
とは困難であり中和生成物である硫化ナトリウム
（Na2S）、水硫化ナトリウム（NaHS）等を酸化せ
しめ、循環薬液中のそれらの含有濃度を低下させ
る等の対策が必要となる。
一方、過マンガン酸カリウムは、多くの種類の
悪臭ガスに対して酸化剤として有効であるが、比
較的高価な為、その消費量を抑えるには、ガス中
の悪臭成分濃度を低くする必要があり、また生成
する二酸化マンガンが該循環薬液中に畜積され、
充填塔その他の湿式洗浄塔内部に付着する為にこ
れを分離除去することも必要である。
本考案者らは、種々の薬液吸引による脱臭方法
を検討した結果、第１塔において苛性ソーダを主
成分とする薬液により、悪臭ガスを洗浄し、第２
塔において悪臭ガスの未処理分を、過マンガン酸
カリウムを主成分とする薬液で洗浄する二段洗浄
式脱臭装置を適用し、この場合、第２塔に循環使
用される洗浄薬液の一部を連続的にあるいは断続
的に抜き取り第２塔で生成した廃物である二酸化
マンガンを沈澱濃縮せしめ、かつ活性化し、これ
を第１塔で循環使用されている洗浄薬液に供給
し、第１塔で生成する中和生成物の酸化剤および
酸化触媒として使用する新規なる薬液洗浄式脱臭
装置を提供するもので、従来のものの欠点を解決
し、きわめて経済的でかつすぐれた脱臭効果を有
する装置である。
本考案によつて得られる長所を更に列記すれ
ば、
(1) 第２塔において生成する二酸化マンガンは、
循環薬液の抜き取りにより除去されるので、第
２塔において、ろ過器、遠心分離器、沈降分離
槽等の固液分離装置を必要としない。
(2) 第２塔における循環薬液の抜き取りにより、
生成した二酸化マンガンとともに、悪臭成分と
過マンガン酸カリウムの反応生成物の液中濃度
も減少するので、薬液循環系内での反応生成物
の畜積が制限され、過マンガン酸カリウムによ
る酸化反応が維持されるので、悪臭ガスの除去
効率の低下がない。
(3) 第１塔の循環薬液に、第２塔の循環液中に生
成した二酸化マンガンが混入され、これが悪臭
ガスと苛性ソーダとの反応生成物（例えば悪臭
ガスが硫化水素の場合には、水硫化ナトリウム
や硫化ナトリウム）の酸化剤および酸化触媒と
して働く為、薬液循環系内でのこれら反応生成
物の畜積がなく悪臭ガスの除去効率が高く維持
される。
(4) 第１塔において、二酸化マンガンの存在のも
とで、悪臭ガスと苛性ソーダとの反応生成物が
酸化されると、イオウが固体として分離され、
また、薬液循環系内の二酸化マンガン
（MnO2）およびその水和物（MnO・H2Oまたは
MnO（OH）2）および水酸化マンガン（Mn
（OH）2）は苛性ソーダ水溶液に不溶であるため
排液処理が容易であり、有害なマンガンイオン
が排液中に遊離存在せず、洗浄排液による水質
汚濁の二次公害を起す心配がない等が特記され
る。
次に、本考案に係る脱臭装置の実施態様を図面
を参照して説明する。
図において、悪臭ガスはガスダクト１より第１
ガス洗浄塔２へ入り、該塔内で苛性ソーダを主成
分とする薬液との気液接触により、悪臭成分の大
部分が除去される。一次洗浄された悪臭ガスは、
第１ガス洗浄塔２よりガスダクト３を経て、第２
ガス洗浄塔４に送られ悪臭成分の未処理分は、過
マンガン酸カリウムを主成分とする薬液との気液
接触により完全に洗浄除去される。第１ガス洗浄
塔２、第２洗浄塔における薬液は、それぞれ循環
使用されるが、第２ガス洗浄塔４の薬液貯留槽５
より、一部の液はポンプ６によつて抜き取られ、
スラツジ貯留槽７へ送られる。スラツジ貯留槽で
スラツジは一定時間滞留させられ、その間にスラ
ツジは沈降し、濃縮され、スラツジの主成分であ
る二酸化マンガンはスラツジ濃縮過程で活性化さ
せられる。この濃縮・活性化された二酸化マンガ
ンを主成分とするスラツジは、連続的に、また
は、断続的に第１ガス洗浄塔２の薬液貯留槽８へ
送入され、第１塔で生成する中和生成物の酸化
剤、酸化触媒として利用される。
次に、本考案の実験例を示して、さらに具体的
に説明するが、本考案の技術の範囲はかかる実験
例によつて限定されるものでない。
実験例
二段洗浄式脱臭装置において、第１洗浄塔では
苛性ソーダでPH値を11に調整した薬液で悪臭ガス
を洗浄し、ついで第２洗浄塔で１重量％の過マン
ガン酸カリウムを含むPH9.5の薬液で洗浄したそ
れぞれの薬液が循環使用される従来の方法の場合
の硫化水素の濃度を第１表中Ａ欄に示す。また同
上の条件下で、さらに第２洗浄塔で生成したスラ
ツジ（二酸化マンガンを主成分とする）を第１洗
浄塔の循環薬液に加える本考案装置による結果を
第１表中Ｂ欄に示す。このときの第１洗浄塔の循
環薬液中の二酸化マンガンの濃度は1000ppmで
ある。
上表に見る如く、本考案の装置Ｂに於ては、第
１洗浄塔の循環薬液中に供給される二酸化マンガ
ンが酸化剤および酸化触媒として作用するので、
通常の苛性ソーダのみによる従来の洗浄方法Ａに
比べて苛性ソーダによる悪臭ガスの中和除去効果
が大きく、しかも第１洗浄塔、第２洗浄塔におけ
る薬液の消費量も少ないことが明らかである。
The present invention relates to a chemical cleaning type deodorizing device for acidic malodorous gases such as hydrogen sulfide using a wet gas scrubbing tower. More specifically, by first treating the foul-smelling gas with a chemical solution whose main component is caustic soda, and then secondly treating the gas after treatment with a chemical solution whose main component is potassium permanganate,
The present invention relates to a device that effectively deodorizes malodorous gas. Cleaning foul-smelling gases with an aqueous solution of caustic soda is particularly effective in removing acidic gases such as hydrogen sulfide by suction, but if the solution is used in circulation, products from acid-alkali neutralization reactions accumulate in the circulating chemical solution. Gradually, the removal efficiency of malodorous gas decreases. In order to maintain high removal efficiency, it is difficult to maintain high removal efficiency even if fresh caustic soda is constantly added to the circulating chemical solution, and the neutralization product sodium sulfide (Na 2 S), water Measures such as oxidizing sodium sulfide (NaHS) and reducing their concentration in circulating chemical solutions are required. On the other hand, potassium permanganate is effective as an oxidizing agent for many types of malodorous gases, but it is relatively expensive, so in order to reduce its consumption, it is necessary to lower the concentration of malodorous components in the gas. and the produced manganese dioxide is accumulated in the circulating drug solution,
Since it adheres to the inside of packed towers and other wet cleaning towers, it is also necessary to separate and remove it. As a result of studying various deodorizing methods by suctioning chemical liquids, the inventors of the present invention discovered that the first tower uses a chemical liquid containing caustic soda as its main component to clean the foul-smelling gas, and the second tower
A two-stage cleaning deodorization device is applied in which the untreated part of the malodorous gas in the tower is washed with a chemical solution containing potassium permanganate as the main component. Manganese dioxide, which is a waste product produced in the second tower, is extracted continuously or intermittently, and is precipitated, concentrated, and activated.This is then supplied to the cleaning chemical solution that is circulated in the first tower, and the manganese dioxide produced in the first tower is The present invention provides a new chemical cleaning type deodorizing device that is used as an oxidizing agent and an oxidizing catalyst for neutralized products, which solves the drawbacks of conventional devices, and is extremely economical and has an excellent deodorizing effect. The advantages obtained by the present invention are as follows: (1) The manganese dioxide produced in the second column is
Since it is removed by drawing out the circulating chemical solution, there is no need for a solid-liquid separation device such as a filter, centrifuge, or sedimentation tank in the second column. (2) By withdrawing the circulating chemical solution in the second tower,
Along with the generated manganese dioxide, the concentration of the reaction product between the malodorous component and potassium permanganate in the liquid also decreases, which limits the accumulation of reaction products in the chemical circulation system and prevents the oxidation reaction caused by potassium permanganate. Therefore, there is no decrease in the removal efficiency of malodorous gas. (3) Manganese dioxide generated in the circulating liquid of the second tower is mixed into the circulating chemical liquid of the first tower, and this is a reaction product of the malodorous gas and caustic soda (for example, if the malodorous gas is hydrogen sulfide, the manganese dioxide produced in the circulating fluid of the second tower is mixed with Since it acts as an oxidizing agent and an oxidation catalyst for sodium sulfide (sodium sulfide and sodium sulfide), there is no accumulation of these reaction products in the chemical circulation system, and the removal efficiency of malodorous gases is maintained at a high level. (4) In the first column, when the reaction product of malodorous gas and caustic soda is oxidized in the presence of manganese dioxide, sulfur is separated as a solid;
In addition, manganese dioxide (MnO 2 ) and its hydrates (MnO・H 2 O or
MnO(OH) 2 ) and manganese hydroxide (Mn
(OH) 2 ) is insoluble in the caustic soda aqueous solution, so it is easy to treat the wastewater, and there are no harmful manganese ions present in the wastewater, so there is no risk of secondary water pollution caused by cleaning wastewater. etc. are specially mentioned. Next, embodiments of the deodorizing device according to the present invention will be described with reference to the drawings. In the figure, the foul-smelling gas flows from gas duct 1 to
The gas enters the gas scrubbing tower 2, where most of the malodorous components are removed by gas-liquid contact with a chemical solution whose main component is caustic soda. The primary cleaned malodorous gas is
From the first gas cleaning tower 2 through the gas duct 3, the second
Untreated malodorous components sent to the gas scrubbing tower 4 are completely cleaned and removed by gas-liquid contact with a chemical solution containing potassium permanganate as a main component. The chemical solutions in the first gas scrubbing tower 2 and the second scrubbing tower are used in circulation, but the chemical solution storage tank 5 of the second gas scrubbing tower 4
Therefore, a part of the liquid is extracted by the pump 6,
The sludge is sent to the sludge storage tank 7. The sludge is retained in the sludge storage tank for a certain period of time, during which time the sludge settles and is concentrated, and manganese dioxide, the main component of the sludge, is activated during the sludge concentration process. This concentrated and activated sludge containing manganese dioxide as a main component is continuously or intermittently fed into the chemical storage tank 8 of the first gas cleaning tower 2, and the neutralized sludge produced in the first tower is Used as a product oxidizer and oxidation catalyst. Next, an experimental example of the present invention will be shown and more specifically explained, but the scope of the technology of the present invention is not limited by such an experimental example. Experimental example In a two-stage cleaning deodorization system, the first cleaning tower cleans the foul-smelling gas with a chemical solution whose pH value is adjusted to 11 with caustic soda, and then the second cleaning tower cleans the foul-smelling gas with a chemical solution containing 1% by weight of potassium permanganate to a pH of 9. Column A in Table 1 shows the concentration of hydrogen sulfide in the case of the conventional method in which each chemical solution washed with the chemical solution No. 5 is recycled. Column B in Table 1 shows the results obtained by the apparatus of the present invention in which the sludge (mainly containing manganese dioxide) produced in the second washing tower was added to the circulating chemical solution in the first washing tower under the same conditions as above. At this time, the concentration of manganese dioxide in the circulating chemical solution in the first cleaning tower is 1000 ppm. As shown in the above table, in the device B of the present invention, the manganese dioxide supplied to the circulating chemical solution in the first cleaning tower acts as an oxidizing agent and an oxidation catalyst.
It is clear that compared to the conventional cleaning method A using only ordinary caustic soda, the effect of neutralizing and removing malodorous gas by caustic soda is greater, and the amount of chemical solution consumed in the first and second cleaning towers is also smaller.
【表】
薬液消費量は処理ガス量6000Nm3／ｈに換算し
た値。
上記の如く本願考案は硫化水素等の悪臭ガスの
洗浄に極めて効果的であるのみならず、薬液の消
費も節減できるという顕著なる利点を有するもの
である。[Table] Chemical consumption is a value converted to a processing gas amount of 6000Nm 3 /h. As described above, the present invention is not only extremely effective in cleaning foul-smelling gases such as hydrogen sulfide, but also has the remarkable advantage of reducing the consumption of chemical solutions.
図は本願考案に係る脱臭装置の１実施態様を示
す説明図である。尚、図中の主要部の符号は次の
通りである。
１……ガスダクト、２……第１ガス洗浄塔、３
……ガスダクト、４……第２ガス洗浄塔、５……
薬液貯留槽、６……ポンプ、７……スラツジ貯留
槽。
The figure is an explanatory view showing one embodiment of the deodorizing device according to the present invention. Incidentally, the symbols of the main parts in the figure are as follows. 1... Gas duct, 2... First gas cleaning tower, 3
...Gas duct, 4...Second gas cleaning tower, 5...
Chemical solution storage tank, 6... pump, 7... sludge storage tank.
Claims (1)
触を行う第１塔と過マンガン酸カリウムを主成分
とする薬液により、気液接触を行う第２塔より成
る、２段洗浄工程による薬液洗浄式脱臭装置にお
いて、第２塔で生成した二酸化マンガンを主成分
とする循環薬液の一部を抜き取るポンプと、この
抜き取り液を滞留させて濃縮・活性化するスラツ
ジ貯留槽と、濃縮・活性化されたスラツジを第１
塔の循環薬液に混入させる手段とから構成したこ
とを特徴とする特に硫化水素等の酸性悪臭ガスの
薬液洗浄式脱臭装置。 Chemical liquid cleaning deodorization with a two-stage cleaning process, consisting of a first column that performs gas-liquid contact using a chemical solution mainly composed of caustic soda, and a second column that performs gas-liquid contact using a chemical solution mainly composed of potassium permanganate. The equipment includes a pump that extracts a portion of the circulating chemical liquid mainly composed of manganese dioxide produced in the second column, a sludge storage tank that retains this extracted liquid and concentrates and activates it, and a sludge that has been concentrated and activated. The first
1. A chemical liquid cleaning type deodorizing device, especially for acidic malodorous gases such as hydrogen sulfide, characterized by comprising means for mixing the chemical liquid into the circulating chemical liquid in the tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18219583U JPS59115419U (en) | 1983-11-28 | 1983-11-28 | Chemical cleaning type deodorizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18219583U JPS59115419U (en) | 1983-11-28 | 1983-11-28 | Chemical cleaning type deodorizing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59115419U JPS59115419U (en) | 1984-08-04 |
| JPS6223537Y2 true JPS6223537Y2 (en) | 1987-06-16 |
Family
ID=30394626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18219583U Granted JPS59115419U (en) | 1983-11-28 | 1983-11-28 | Chemical cleaning type deodorizing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59115419U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61204022A (en) * | 1985-02-12 | 1986-09-10 | Taiyo Sanso Kk | Method and apparatus for removing acid content contained in gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4871767A (en) * | 1971-12-29 | 1973-09-28 | ||
| JPS4895995A (en) * | 1972-02-29 | 1973-12-08 | ||
| JPS49133616A (en) * | 1973-04-26 | 1974-12-23 |
-
1983
- 1983-11-28 JP JP18219583U patent/JPS59115419U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4871767A (en) * | 1971-12-29 | 1973-09-28 | ||
| JPS4895995A (en) * | 1972-02-29 | 1973-12-08 | ||
| JPS49133616A (en) * | 1973-04-26 | 1974-12-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59115419U (en) | 1984-08-04 |
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