JP2001157896A - Method and apparatus for treating waste liquid - Google Patents
Method and apparatus for treating waste liquidInfo
- Publication number
- JP2001157896A JP2001157896A JP34474599A JP34474599A JP2001157896A JP 2001157896 A JP2001157896 A JP 2001157896A JP 34474599 A JP34474599 A JP 34474599A JP 34474599 A JP34474599 A JP 34474599A JP 2001157896 A JP2001157896 A JP 2001157896A
- Authority
- JP
- Japan
- Prior art keywords
- waste liquid
- exhaust gas
- treatment
- alkaline waste
- alkaline
- 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
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アルカリ性廃液に
含まれる不純物を酸性の凝集剤にて凝集させる凝集処理
を行う廃液処理方法、及び、アルカリ性廃液に含まれる
不純物を酸性の凝集剤にて凝集させる凝集処理部が設け
られた廃液処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste liquid treatment method in which an impurity contained in an alkaline waste liquid is aggregated with an acidic flocculant, and an impurity contained in the alkaline waste liquid is aggregated with an acidic flocculant. The present invention relates to a waste liquid treatment apparatus provided with a coagulation treatment section.
【０００２】[0002]
【従来の技術】かかる廃液処理方法及び廃液処理装置
は、酸性の凝集剤（以下、単に凝集剤と記載する場合が
ある）によって、アルカリ性廃液中にコロイド状、懸濁
状等で存在している不純物を凝集させる凝集処理を行う
ものである。従来は、アルカリ性廃液をそのままの状態
で直接、凝集剤にて凝集処理していた。2. Description of the Related Art Such a waste liquid treatment method and a waste liquid treatment apparatus exist in an alkaline waste liquid in a colloidal state or a suspended state by an acidic flocculant (hereinafter sometimes simply referred to as a flocculant). The coagulation treatment for coagulating impurities is performed. Conventionally, an alkaline waste liquid is directly subjected to a coagulation treatment with a coagulant as it is.
【０００３】[0003]
【発明が解決しようとする課題】ところで、凝集剤によ
る凝集を促進させるためには、アルカリ性廃液を酸性に
する必要がある。しかしながら、従来は、アルカリ性廃
液を直接、凝集剤にて凝集処理するものであり、凝集剤
によって、アルカリ性廃液を凝集に適した酸性度にまで
酸性にした状態で凝集処理を行うので、凝集剤の使用量
が多かった。従って、従来では、凝集剤の使用量が多い
ために廃液処理コストが高く、改善が望まれていた。In order to promote the coagulation by the coagulant, it is necessary to make the alkaline waste liquid acidic. However, conventionally, the alkaline waste liquid is directly subjected to coagulation treatment with a coagulant, and the coagulation treatment is performed with the coagulant in a state where the alkaline waste liquid is acidified to an acidity suitable for coagulation. The amount used was large. Therefore, conventionally, the waste liquid treatment cost is high due to the large amount of the coagulant used, and improvement has been desired.
【０００４】本発明は、かかる実情に鑑みてなされたも
のであり、その目的は、廃液処理コストを低減し得る廃
液処理方法及び廃液処理装置を提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a waste liquid treatment method and a waste liquid treatment apparatus capable of reducing waste liquid treatment costs.
【０００５】[0005]
【課題を解決するための手段】〔請求項１記載の発明〕
請求項１に記載の廃液処理方法の特徴は、前記凝集処理
を行う前に、アルカリ性廃液を燃焼排ガスと接触させ
て、アルカリ廃液を中和する中和処理を行うことにあ
る。請求項１に記載の廃液処理方法によれば、凝集処理
を行う前に、アルカリ性廃液を燃焼排ガスと接触させ
て、燃焼排ガスに含まれる二酸化炭素によりアルカリ性
廃液を中和する中和処理を行うので、凝集剤にて凝集処
理するアルカリ性廃液のｐＨ値が小さくなる。従って、
凝集剤にて凝集処理するアルカリ性廃液のｐＨ値が小さ
くなる分、凝集剤の使用量を削減することができるの
で、廃液処理コストを低減し得る廃液処理方法を提供す
ることができるようになった。しかも、この廃液処理方
法を採用することにより、燃焼装置から排出される排ガ
スに含まれている二酸化炭素の一部が、大気中に放出さ
れずに、アルカリ性廃液を中和するために使われるの
で、大気中への二酸化炭素の放出量を低減することがで
きる。Means for Solving the Problems [Invention according to claim 1]
A feature of the waste liquid treatment method according to claim 1 is that a neutralization treatment for neutralizing the alkaline waste liquid is performed by bringing the alkaline waste liquid into contact with combustion exhaust gas before performing the aggregation treatment. According to the waste liquid treatment method of the first aspect, before performing the coagulation treatment, the alkaline waste liquid is brought into contact with the combustion exhaust gas, and the neutralization treatment for neutralizing the alkaline waste liquid with carbon dioxide contained in the combustion exhaust gas is performed. In addition, the pH value of the alkaline waste liquid subjected to the coagulation treatment with the coagulant decreases. Therefore,
Since the amount of the coagulant used can be reduced as much as the pH value of the alkaline waste liquid subjected to the coagulation treatment with the coagulant is reduced, a waste liquid treatment method capable of reducing the waste liquid treatment cost can be provided. . Moreover, by adopting this waste liquid treatment method, part of the carbon dioxide contained in the exhaust gas discharged from the combustion device is used to neutralize the alkaline waste liquid without being released to the atmosphere. Thus, the amount of carbon dioxide released into the atmosphere can be reduced.
【０００６】〔請求項２記載の発明〕請求項２に記載の
廃液処理装置の特徴構成は、前記凝集処理部に供給され
る前のアルカリ性廃液を燃焼排ガスと接触させて、アル
カリ性廃液を中和する中和処理部が設けられていること
にある。請求項２に記載の廃液処理装置によれば、中和
処理部において、凝集処理部に供給される前のアルカリ
性廃液を燃焼排ガスと接触させて、燃焼排ガスに含まれ
る二酸化炭素によりアルカリ性廃液を中和するので、凝
集処理部に供給されるアルカリ性廃液のｐＨ値が小さく
なる。従って、凝集剤にて凝集処理するアルカリ性廃液
のｐＨ値が小さくなる分、凝集剤の使用量を削減するこ
とができるので、廃液処理コストを低減し得る廃液処理
装置を提供することができるようになった。しかも、こ
の廃液処理装置によれば、燃焼装置から排出される排ガ
スに含まれている二酸化炭素の一部が、大気中に放出さ
れずに、アルカリ性廃液を中和するために使われるの
で、大気中への二酸化炭素の放出量を低減するという効
果も奏する。According to a second aspect of the present invention, there is provided a waste liquid treatment apparatus characterized in that an alkaline waste liquid before being supplied to the coagulation treatment section is brought into contact with combustion exhaust gas to neutralize the alkaline waste liquid. That is, a neutralization processing unit is provided. According to the waste liquid treatment apparatus according to the second aspect, in the neutralization treatment section, the alkaline waste liquid before being supplied to the coagulation treatment section is brought into contact with the combustion exhaust gas, and the alkaline waste liquid is neutralized by carbon dioxide contained in the combustion exhaust gas. As a result, the pH value of the alkaline waste liquid supplied to the coagulation treatment section becomes smaller. Accordingly, the amount of the coagulant used can be reduced as much as the pH value of the alkaline waste liquid subjected to the coagulation treatment with the coagulant is reduced, so that it is possible to provide a waste liquid treatment apparatus capable of reducing the waste liquid treatment cost. became. In addition, according to this waste liquid treatment device, part of the carbon dioxide contained in the exhaust gas discharged from the combustion device is used to neutralize the alkaline waste liquid without being released to the atmosphere. It also has the effect of reducing the amount of carbon dioxide released into it.
【０００７】〔請求項３記載の発明〕請求項３に記載の
廃液処理装置の特徴構成は、前記中和処理部が、前記燃
焼排ガスを泡状にてアルカリ性廃液中に供給する発泡手
段を備えて構成され、ガスエンジンから排出される排ガ
スを前記燃焼排ガスとして前記発泡手段に供給すべく、
前記発泡手段に前記ガスエンジンの排気部が接続されて
いることにある。請求項３に記載の廃液処理装置によれ
ば、ガスエンジンの排気部からの排ガスが燃焼排ガスと
して中和処理部の発泡手段に供給され、中和処理部にお
いては、発泡手段から燃焼排ガスが泡状にアルカリ性廃
液中に供給されて、アルカリ性廃液が中和処理される。
つまり、アルカリ性廃液と燃焼排ガスとを接触させる形
態として、燃焼排ガスを泡状にてアルカリ性廃液中に供
給する形態を採用することにより、例えば、燃焼排ガス
に対してアルカリ性廃液を散布する形態に比べて、アル
カリ性廃液と燃焼排ガスとの接触を一層促進させて、ア
ルカリ性廃液の中和を促進させることができる。又、ガ
スエンジンから排出される排ガスの圧力は、ガスタービ
ンから排出される排ガスや、ボイラから排出される排ガ
スに比べて高いので、アルカリ性廃液を中和処理するた
めの燃焼排ガスとして、ガスエンジンの排ガスを用いる
と、ガスタービンやボイラの排ガスを用いる場合と比べ
て、発泡手段の目詰まり等の不具合を抑制する面で有利
となる。ちなみに、ガスエンジンの排ガスの圧力は、例
えば６０００Ｐａ程度であり、これに対して、ガスター
ビンの排ガスの圧力は２５００〜３０００Ｐａ程度、ボ
イラの排ガスの圧力は、１００〜２００Ｐａ程度であ
る。従って、アルカリ性廃液と燃焼排ガスとを接触させ
る形態として、燃焼排ガスを泡状にてアルカリ性廃液中
に供給する形態を採用すると共に、アルカリ性廃液を中
和処理するための燃焼排ガスとして、ガスエンジンの排
ガスを用いることによって、アルカリ性廃液と燃焼排ガ
スとの接触の促進により、アルカリ性廃液の中和処理を
一層促進させて、凝集剤の削減量を増大させることがで
き、しかも、燃焼排ガスを泡状にてアルカリ性廃液中に
供給するようにするにしても、発泡手段の目詰まりを抑
制して、メンテナンスを軽減することができるようにな
った。According to a third aspect of the present invention, there is provided a waste liquid treatment apparatus according to the third aspect, wherein the neutralization treatment section includes a foaming means for supplying the combustion exhaust gas in a foam form to the alkaline waste liquid. In order to supply the exhaust gas discharged from the gas engine to the foaming means as the combustion exhaust gas,
An exhaust part of the gas engine is connected to the foaming means. According to the waste liquid treatment apparatus of the third aspect, the exhaust gas from the exhaust part of the gas engine is supplied to the foaming means of the neutralization processing part as combustion exhaust gas. The alkaline waste liquid is supplied in the form of an alkaline waste liquid, and the alkaline waste liquid is neutralized.
In other words, as a form in which the alkaline waste liquid is brought into contact with the combustion exhaust gas, by adopting a form in which the combustion exhaust gas is supplied into the alkaline waste liquid in the form of foam, for example, compared to a form in which the alkaline waste liquid is sprayed on the combustion exhaust gas Further, the contact between the alkaline waste liquid and the combustion exhaust gas can be further promoted, and the neutralization of the alkaline waste liquid can be promoted. Further, since the pressure of the exhaust gas discharged from the gas engine is higher than the exhaust gas discharged from the gas turbine and the exhaust gas discharged from the boiler, the exhaust gas of the gas engine is used as a combustion exhaust gas for neutralizing the alkaline waste liquid. The use of exhaust gas is more advantageous than the case of using exhaust gas from a gas turbine or a boiler in terms of suppressing problems such as clogging of the foaming means. Incidentally, the pressure of the exhaust gas of the gas engine is, for example, about 6000 Pa, while the pressure of the exhaust gas of the gas turbine is about 2500 to 3000 Pa, and the pressure of the exhaust gas of the boiler is about 100 to 200 Pa. Therefore, as a form in which the alkaline waste liquid is brought into contact with the combustion exhaust gas, a form in which the combustion exhaust gas is supplied into the alkaline waste liquid in the form of bubbles is employed, and the exhaust gas of the gas engine is used as the combustion exhaust gas for neutralizing the alkaline waste liquid. By promoting the contact between the alkaline waste liquid and the combustion exhaust gas, the neutralization treatment of the alkaline waste liquid can be further promoted, and the amount of the coagulant reduced can be increased. Even when the liquid is supplied into the alkaline waste liquid, clogging of the foaming means can be suppressed, and maintenance can be reduced.
【０００８】[0008]
【発明の実施の形態】〔第１実施形態〕以下、図１及び
図２に基づいて、本発明の第１の実施の形態を説明す
る。図１に示すように、廃液処理装置ＷＤは、アルカリ
性廃液と燃焼排ガスとを接触させて、アルカリ性廃液を
中和する中和処理部Ｎと、その中和処理部Ｎから中和処
理後のアルカリ性廃液が供給されて、供給されるアルカ
リ性廃液に含まれる不純物を酸性の凝集剤にて凝集させ
る凝集処理部としての凝集処理槽１と、その凝集処理槽
１から凝集処理後の酸性の液が供給されて、供給される
酸性の液を中性にする中性化処理槽２と、その中性化処
理槽２から槽内の液が供給されて、供給される液に含ま
れる不純物を更に高分子凝集剤にて凝集させて、沈殿さ
せる沈殿槽３と、その沈殿槽３から槽内の液が供給され
て、供給される液を貯留すると共に貯留液を放水する放
流槽４等を備えて構成している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a waste liquid treatment device WD includes a neutralization treatment section N for bringing an alkaline waste liquid into contact with combustion exhaust gas to neutralize the alkaline waste liquid, and an alkaline solution after the neutralization treatment from the neutralization treatment section N. A waste liquid is supplied, and an aggregating treatment tank 1 as an aggregating treatment unit for aggregating impurities contained in the supplied alkaline waste liquid with an acidic aggregating agent, and an acidic liquid after the aggregating treatment is supplied from the aggregating treatment tank 1 Then, a neutralization treatment tank 2 for neutralizing the supplied acidic liquid, and a liquid in the tank is supplied from the neutralization treatment tank 2 to further increase impurities contained in the supplied liquid. A sedimentation tank 3 for coagulating and precipitating with a molecular coagulant, and a discharge tank 4 for supplying the liquid in the tank from the sedimentation tank 3 and storing the supplied liquid and discharging the stored liquid are provided. Make up.
【０００９】中和処理部Ｎは、廃液供給路７から供給さ
れる廃液を貯留する中和処理槽５と、その中和処理槽５
内の底部に配置された発泡手段としての散気箱６を備え
て構成してある。散気箱６は、図２に示すように、上面
部が開口したケーシング６ａの開口部に、板状の多孔状
体６ｂを嵌め込んで構成してある。そして、散気箱６内
に燃焼排ガスを供給して、多孔状体６ｂから燃焼排ガス
を細かい泡状にて、中和処理槽５に貯留されているアル
カリ性廃液中に供給することにより、アルカリ性廃液と
燃焼排ガスとを接触させて、下記の化１に示す反応式に
て、燃焼排ガス中の二酸化炭素によりアルカリ性廃液を
所定のｐＨにまで中和処理するように構成してある。The neutralization section N includes a neutralization tank 5 for storing the waste liquid supplied from the waste liquid supply path 7 and the neutralization tank 5.
It is provided with an air diffusion box 6 as a foaming means arranged at the bottom of the inside. As shown in FIG. 2, the air diffusion box 6 is configured by fitting a plate-shaped porous body 6b into an opening of a casing 6a having an upper surface opened. Then, the combustion exhaust gas is supplied into the diffuser box 6, and the combustion exhaust gas is supplied from the porous body 6 b in the form of fine bubbles into the alkaline waste liquid stored in the neutralization tank 5. And the flue gas are brought into contact with each other to neutralize the alkaline waste liquid to a predetermined pH with carbon dioxide in the flue gas according to the reaction formula shown in Chemical Formula 1 below.
【００１０】[0010]
【化１】ＣＯ2 ＋Ｈ2 Ｏ→Ｈ2 ＣＯ3 Ｈ2 ＣＯ3 →ＣＯ3 2- ＋２Ｈ+ ## STR1 ## CO 2 + H 2 O → H 2 CO 3 H 2 CO 3 → CO 3 2- + 2H +
【００１１】そして、コージェネレーションシステムＣ
Ｇに備えられたガスエンジン３１から排出される排ガス
を、アルカリ性廃液中和処理用の燃焼排ガスとして散気
箱６に供給すべく、ガスエンジン３１の排気路３４と散
気箱６とを、燃焼排ガス供給路８にて接続してある。Then, the cogeneration system C
In order to supply the exhaust gas discharged from the gas engine 31 provided in the G to the diffuser box 6 as the combustion exhaust gas for the alkaline waste liquid neutralization treatment, the exhaust path 34 of the gas engine 31 and the diffuser box 6 are burned. It is connected by an exhaust gas supply path 8.
【００１２】凝集処理槽１には、中和処理槽５から、中
和処理されたアルカリ性廃液がオーバーフロー状態で連
通路９を通じて供給されると共に、第１薬液タンク１０
から第１薬液供給路１１を通じて、凝集剤としての硫酸
アルミニウム（Ａｌ2 （ＳＯ 4 ）3 ）の水溶液（例え
ば、１０％溶液）が供給され、下記の化２の反応式に
て、凝集処理槽１内の液のｐＨが調整されると共に、凝
集反応が起こる。尚、凝集処理槽１内の液のｐＨが凝集
反応に適したｐＨに維持されるように、第１薬液タンク
１０からの硫酸アルミニウム溶液の供給量が調整され
る。In the coagulation treatment tank 1, the neutralization treatment tank 5
The summed alkaline waste liquid is continuously overflowed.
While being supplied through the passage 9, the first chemical liquid tank 10
Sulfuric acid as a coagulant
Aluminum (AlTwo(SO Four)Three) Aqueous solution (eg
(For example, a 10% solution) is supplied.
The pH of the liquid in the coagulation treatment tank 1 is adjusted, and
A collection reaction occurs. The pH of the liquid in the coagulation tank 1 is
First chemical tank to maintain the pH suitable for the reaction
The supply amount of aluminum sulfate solution from 10 is adjusted
You.
【００１３】[0013]
【化２】Ａｌ2 （ＳＯ4 ）3 →２Ａｌ3+＋３ＳＯ4 2- Ａｌ3+＋３Ｈ2 Ｏ→Ａｌ（ＯＨ）3 ↓＋３Ｈ+ ## STR2 ## Al 2 (SO 4 ) 3 → 2Al 3+ + 3SO 4 2- Al 3+ + 3H 2 O → Al (OH) 3 ↓ + 3H +
【００１４】中性化処理槽２には、凝集処理槽１から凝
集処理後の酸性液がオーバーフロー状態で連通路１２を
通じて供給されると共に、第２薬液タンク１３から第２
薬液供給路１４を通じて、苛性ソーダの水溶液（例え
ば、５％溶液）が供給され、槽内の液が中性にされる。The acidified liquid after the coagulation treatment is supplied from the coagulation treatment tank 1 to the neutralization treatment tank 2 through the communication passage 12 in an overflow state.
An aqueous solution of caustic soda (e.g., a 5% solution) is supplied through the chemical solution supply path 14 to neutralize the solution in the tank.
【００１５】沈殿槽３には、中性化処理槽２から槽内の
液がオーバーフロー状態で連通路１５を通じて供給され
ると共に、第３薬液タンク１６から高分子凝集剤が第３
薬液供給路１７を通じて供給され、槽内底部に凝集物が
沈殿する。沈殿槽３内の上澄み液が、オーバーフロー状
態で連通路１８を通じて放流槽４に供給され、放流槽４
内の液が放流路１９を通じて放流される。The sedimentation tank 3 is supplied with the liquid in the tank from the neutralization treatment tank 2 in an overflow state through the communication path 15, and the polymer coagulant is supplied from the third chemical liquid tank 16 to the third chemical liquid tank 16.
Aggregates are supplied through the chemical solution supply path 17 and settle at the bottom of the tank. The supernatant liquid in the sedimentation tank 3 is supplied to the discharge tank 4 through the communication passage 18 in an overflow state.
The liquid inside is discharged through the discharge channel 19.
【００１６】例えば、廃液供給路７を通じて、ｐＨ１
２．９程度の処理対象のアルカリ性廃液が廃液処理装置
に供給される場合、中和処理部Ｎで、ｐＨ１２．９のア
ルカリ性廃液をｐＨ７程度にまで中和処理し、凝集処理
槽１では、中和処理部ＮでｐＨ７程度にまで中和処理さ
れたアルカリ性廃液を、更に、凝集反応に適したｐＨ５
程度の酸性にして、凝集処理する。For example, when the pH 1
When about 2.9 alkaline waste liquid to be treated is supplied to the waste liquid treatment apparatus, the alkaline waste liquid having a pH of 12.9 is neutralized to a pH of about 7 in the neutralization treatment section N. The alkaline waste liquid neutralized to about pH 7 in the sum treatment section N is further subjected to pH 5 suitable for agglutination.
It is made acidic to a degree and subjected to a coagulation treatment.
【００１７】従って、ｐＨ１２．９程度のアルカリ性廃
液をｐＨ７程度にまで中和処理するのに費やされる量の
二酸化炭素が、大気中に放出されるのが回避されること
になる。又、ｐＨ１２．９程度のアルカリ性廃液をｐＨ
７程度にまで中和するのに要する量の硫酸アルミニウム
を、削減することができる。尚、大気中への二酸化炭素
放出量の低減量、及び、硫酸アルミニウム使用量の低減
量の実際の値は、処理対象のアルカリ性廃液のｐＨ値、
及び、廃液処理装置による単位時間当たりの処理量に基
づいて、容易に算出することができる。Therefore, the amount of carbon dioxide used to neutralize the alkaline waste liquid having a pH of about 12.9 to about pH 7 is prevented from being released into the atmosphere. Further, alkaline waste liquid having a pH of about 12.9
The amount of aluminum sulfate required to neutralize to about 7 can be reduced. In addition, the actual value of the amount of reduction of the amount of carbon dioxide released into the atmosphere and the amount of reduction of the amount of aluminum sulfate used is the pH value of the alkaline waste liquid to be treated,
And it can be easily calculated based on the amount of processing per unit time by the waste liquid processing apparatus.
【００１８】コージェネレーションシステムＣＧは、詳
細な説明は省略するが、燃料ガス供給路３２を通じて供
給される都市ガス等のガス燃料を燃料とする希薄燃焼式
のガスエンジン３１と、そのガスエンジン３１にて駆動
される発電機３３と、ガスエンジン３１からの排ガスを
排出する排気路３４と、その排気路３４を通流する排ガ
スと排熱回収路３５を通流する水とを熱交換する排熱回
収用熱交換器３６等を備えて構成してあり、発電機３３
から電力が得られると共に、排熱回収路３５から温水が
得られる。Although not described in detail, the cogeneration system CG includes a lean burn type gas engine 31 that uses gas fuel such as city gas supplied through a fuel gas supply path 32 as a fuel, and the gas engine 31 includes: , A generator 33 that is driven by the exhaust gas, an exhaust path 34 that discharges exhaust gas from the gas engine 31, and an exhaust heat that exchanges heat between the exhaust gas flowing through the exhaust path 34 and the water flowing through the exhaust heat recovery path 35. The generator 33 includes a heat exchanger for recovery 36 and the like.
From the exhaust heat recovery passage 35 and hot water.
【００１９】〔第２実施形態〕以下、図３に基づいて、
本発明の第２の実施の形態を説明する。尚、第１実施形
態と同じ構成要素や同じ作用を有する構成要素について
は、重複説明を避けるために、同じ符号を付すことによ
り説明を省略し、主として、第１実施形態と異なる構成
を説明する。第２実施形態においては、燃焼排ガス供給
路８にブロア２０を設けて、ガスエンジン３１から排出
される排ガスをブロア２０にて昇圧して、散気箱６に供
給するように構成してある。尚、図３中の２１は、中和
処理部Ｎに対する排ガス供給量の調節を行うバタフライ
バルブである。[Second Embodiment] Hereinafter, based on FIG.
A second embodiment of the present invention will be described. Note that the same components as those of the first embodiment and components having the same operations are denoted by the same reference numerals to avoid redundant description, and description thereof will be omitted, and a configuration different from that of the first embodiment will be mainly described. . In the second embodiment, a blower 20 is provided in the combustion exhaust gas supply passage 8, and the exhaust gas discharged from the gas engine 31 is pressurized by the blower 20 and supplied to the diffuser box 6. Incidentally, reference numeral 21 in FIG. 3 denotes a butterfly valve for adjusting the amount of exhaust gas supplied to the neutralization section N.
【００２０】従って、散気箱６に燃焼排ガスとして供給
される排ガスの圧力を高くすることができるので、孔径
が更に小さい多孔状体６ｂを用いることができて、アル
カリ性廃液と燃焼排ガスとの接触を更に促進させること
ができるので、中和処理部Ｎでの中和処理能力を向上す
ることができる。Therefore, since the pressure of the exhaust gas supplied to the diffuser box 6 as the combustion exhaust gas can be increased, the porous body 6b having a smaller pore diameter can be used, and the contact between the alkaline waste liquid and the combustion exhaust gas can be achieved. Can be further promoted, so that the neutralization processing capacity in the neutralization processing section N can be improved.
【００２１】又、中和処理用の燃焼排ガスとして、ガス
エンジン３１の排ガスを用いていることから、ガスエン
ジン３１の排ガスの圧力は、ガスタービンやボイラの排
ガスの圧力に比べて高いので、中和処理用の燃焼排ガス
としてガスタービンやボイラの排ガスを用いる場合に比
べて、ブロア２０の消費電力を少なくして、省エネを図
ることができる。Since the exhaust gas of the gas engine 31 is used as the combustion exhaust gas for the neutralization treatment, the pressure of the exhaust gas of the gas engine 31 is higher than the pressure of the exhaust gas of a gas turbine or a boiler. Power consumption of the blower 20 can be reduced and energy can be saved, as compared with the case of using exhaust gas from a gas turbine or a boiler as combustion exhaust gas for sum processing.
【００２２】〔別実施形態〕次に別実施形態を説明す
る。 （イ） 凝集剤の具体例としては、上記の実施形態で例
示した硫酸アルミニウムに限定されるものではなく、ポ
リ塩化アルミニウム、塩化第二鉄、硫酸第二鉄等、種々
のものを用いることができる。[Another Embodiment] Next, another embodiment will be described. (A) Specific examples of the flocculant are not limited to the aluminum sulfate exemplified in the above embodiment, and various types such as polyaluminum chloride, ferric chloride, and ferric sulfate may be used. it can.
【００２３】（ロ） 中和処理部Ｎにてアルカリ性廃液
を中和処理するための目標ｐＨ値は、上記の実施形態で
例示したｐＨ７に限定されるものではなく、ｐＨ７より
も小さく設定しても良いし、ｐＨ７よりも大きく設定し
ても良い。目標ｐＨ値は、小さく設定するほど、二酸化
炭素の放出量低減、及び、凝集剤の使用量削減の面で有
利となるが、中和処理に要する時間が長くなるので、処
理能力が低下する。(B) The target pH value for neutralizing the alkaline waste liquid in the neutralizing section N is not limited to the pH 7 exemplified in the above embodiment, but may be set lower than the pH 7. Or may be set higher than pH 7. The smaller the target pH value is, the more advantageous in terms of reducing the amount of carbon dioxide emitted and the amount of coagulant used, but the time required for the neutralization treatment becomes longer, so that the processing capacity decreases.
【００２４】（ハ） 凝集処理槽１において、凝集を促
進させるために槽内の液のｐＨを調整する目標ｐＨ値
は、凝縮剤として硫酸アルミニウムを用いる場合であっ
ても、上記の実施形態において例示したｐＨ５に限定さ
れるものではなく、凝集を促進させる上で適したｐＨ値
に適宜設定することができる。又、硫酸アルミニウム以
外の凝集剤を用いる場合は、用いる凝集剤に応じて、凝
集を促進させる上で適したｐＨ値に設定する。(C) In the coagulation treatment tank 1, the target pH value for adjusting the pH of the liquid in the tank in order to promote coagulation is determined in the above embodiment even when aluminum sulfate is used as a condensing agent. The pH is not limited to the exemplified pH 5, but may be appropriately set to a pH value suitable for promoting aggregation. When a coagulant other than aluminum sulfate is used, a pH value suitable for promoting coagulation is set according to the coagulant to be used.
【００２５】（ニ） 中和処理部Ｎにおいて、アルカリ
性廃液と燃焼排ガスとを接触させる構成は、実施形態に
おいて例示した構成に限定されるものではなく、例え
ば、アルカリ性廃液を、シャワー等によって燃焼排ガス
に対して散布するように構成することができる。(D) The configuration in which the alkaline waste liquid is brought into contact with the combustion exhaust gas in the neutralization treatment section N is not limited to the configuration exemplified in the embodiment. To be sprayed.
【００２６】（ホ） アルカリ性廃液中和処理用の燃焼
排ガスの供給源としては、上記の実施形態において例示
した希薄燃焼式のガスエンジン３１に限定されるもので
はなく、理論空気比付近の空気量にて燃焼させる通常の
ガスエンジンでも良く、あるいは、ガスエンジン以外
に、ガスタービンやボイラでも良い。 （ヘ） 本発明の廃液処理装置で処理するアルカリ性廃
液としては、電気製品の製造工場等、各種工場から排出
されるアルカリ性廃液を始めとして、各種のアルカリ性
廃液を適用することができる。(E) The supply source of the combustion exhaust gas for the alkaline waste liquid neutralization treatment is not limited to the lean burn type gas engine 31 exemplified in the above embodiment, and the air amount near the stoichiometric air ratio is not limited. The gas engine may be a normal gas engine or a gas turbine or a boiler other than the gas engine. (F) As the alkaline waste liquid to be treated by the waste liquid treatment apparatus of the present invention, various kinds of alkaline waste liquid including alkaline waste liquid discharged from various factories such as a factory for manufacturing electric appliances can be applied.
【図１】第１実施形態に係る廃液処理装置の系統図FIG. 1 is a system diagram of a waste liquid treatment apparatus according to a first embodiment.
【図２】第１実施形態に係る廃液処理装置における中和
処理部の散気箱の斜視図FIG. 2 is a perspective view of an air diffuser box of a neutralization processing unit in the waste liquid processing apparatus according to the first embodiment.
【図３】第２実施形態に係る廃液処理装置の系統図FIG. 3 is a system diagram of a waste liquid treatment apparatus according to a second embodiment.
１ 凝集処理部 ６ 発泡手段 ３１ ガスエンジン ３４ 排気部 Ｎ 中和処理部 DESCRIPTION OF SYMBOLS 1 Aggregation processing part 6 Foaming means 31 Gas engine 34 Exhaust part N Neutralization processing part
フロントページの続き Ｆターム(参考） 4D015 BA19 BA21 BB09 BB12 CA20 DA04 DA05 DA13 DA16 DA39 DB01 DC02 EA13 EA16 EA23 EA32 FA01 FA28 4D062 BA19 BA21 BB09 BB12 CA20 DA04 DA05 DA13 DA16 DA39 DB01 DC02 EA13 EA16 EA23 EA32 FA01 FA28 Continued on the front page F term (reference) 4D015 BA19 BA21 BB09 BB12 CA20 DA04 DA05 DA13 DA16 DA39 DB01 DC02 EA13 EA16 EA23 EA32 FA01 FA28 4D062 BA19 BA21 BB09 BB12 CA20 DA04 DA05 DA13 DA16 DA39 DB01 DC02 EA13 EA16 EA28 EA32
Claims (3)
の凝集剤にて凝集させる凝集処理を行う廃液処理方法で
あって、 前記凝集処理を行う前に、アルカリ性廃液を燃焼排ガス
と接触させて、アルカリ性廃液を中和する中和処理を行
う廃液処理方法。1. A waste liquid treatment method for performing an aggregation treatment in which impurities contained in an alkaline waste liquid are aggregated with an acidic coagulant, wherein the alkaline waste liquid is brought into contact with combustion exhaust gas before performing the aggregation treatment. A waste liquid treatment method for performing a neutralization treatment for neutralizing the waste liquid.
の凝集剤にて凝集させる凝集処理部が設けられた廃液処
理装置であって、 前記凝集処理部に供給される前のアルカリ性廃液を燃焼
排ガスと接触させて、アルカリ性廃液を中和する中和処
理部が設けられている廃液処理装置。2. A waste liquid treatment apparatus provided with a coagulation treatment section for coagulating impurities contained in an alkaline waste liquid with an acidic coagulant, wherein the alkaline waste liquid before being supplied to the coagulation treatment section is converted into a combustion exhaust gas. A waste liquid treatment device provided with a neutralization treatment section for contacting and neutralizing an alkaline waste liquid.
状にてアルカリ性廃液中に供給する発泡手段を備えて構
成され、 ガスエンジンから排出される排ガスを前記燃焼排ガスと
して前記発泡手段に供給すべく、前記発泡手段に前記ガ
スエンジンの排気部が接続されている請求項２記載の廃
液処理装置。3. The foaming device according to claim 1, wherein the neutralizing unit includes a foaming unit that supplies the combustion exhaust gas in a form of foam to the alkaline waste liquid, and the exhaust gas discharged from a gas engine is used as the combustion exhaust gas by the foaming unit. 3. The waste liquid treatment apparatus according to claim 2, wherein an exhaust part of the gas engine is connected to the foaming means to supply the gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34474599A JP2001157896A (en) | 1999-12-03 | 1999-12-03 | Method and apparatus for treating waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34474599A JP2001157896A (en) | 1999-12-03 | 1999-12-03 | Method and apparatus for treating waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001157896A true JP2001157896A (en) | 2001-06-12 |
Family
ID=18371661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34474599A Pending JP2001157896A (en) | 1999-12-03 | 1999-12-03 | Method and apparatus for treating waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001157896A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006026472A (en) * | 2004-07-13 | 2006-02-02 | Asahi Kagaku Kogyo Co Ltd | Method for neutralizing alkali soil and leachate from the soil |
| JP2007253052A (en) * | 2006-03-23 | 2007-10-04 | Osaka Gas Co Ltd | Equipment and method for water cleaning |
| JP2014054615A (en) * | 2012-08-16 | 2014-03-27 | Ihi Corp | Neutralization apparatus, neutralization system, and neutralization method |
| KR101800290B1 (en) * | 2016-05-19 | 2017-12-20 | 한양수 | Alkaline waste water neutralizing equipment and method for neutralizing alkaline waste water using the same |
| KR20180134781A (en) * | 2018-08-29 | 2018-12-19 | 한양수 | Akalic waste water neutralizing and softening equipment and system and method for akalic waste water treatment using the same |
| KR20190009916A (en) * | 2017-07-20 | 2019-01-30 | 한양수 | Akalic waste water neutralizing and softening system using carbondioxide and method for treatment of akalic waste water using the same |
-
1999
- 1999-12-03 JP JP34474599A patent/JP2001157896A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006026472A (en) * | 2004-07-13 | 2006-02-02 | Asahi Kagaku Kogyo Co Ltd | Method for neutralizing alkali soil and leachate from the soil |
| JP4590222B2 (en) * | 2004-07-13 | 2010-12-01 | 朝日化学工業株式会社 | Method for neutralizing alkaline soil and leachate from the soil |
| JP2007253052A (en) * | 2006-03-23 | 2007-10-04 | Osaka Gas Co Ltd | Equipment and method for water cleaning |
| JP4571086B2 (en) * | 2006-03-23 | 2010-10-27 | 大阪瓦斯株式会社 | Water purification equipment and treatment method |
| JP2014054615A (en) * | 2012-08-16 | 2014-03-27 | Ihi Corp | Neutralization apparatus, neutralization system, and neutralization method |
| KR101800290B1 (en) * | 2016-05-19 | 2017-12-20 | 한양수 | Alkaline waste water neutralizing equipment and method for neutralizing alkaline waste water using the same |
| KR20190009916A (en) * | 2017-07-20 | 2019-01-30 | 한양수 | Akalic waste water neutralizing and softening system using carbondioxide and method for treatment of akalic waste water using the same |
| KR101962679B1 (en) * | 2017-07-20 | 2019-07-31 | 한양수 | Akalic waste water neutralizing and softening system using carbondioxide and method for treatment of akalic waste water using the same |
| KR20180134781A (en) * | 2018-08-29 | 2018-12-19 | 한양수 | Akalic waste water neutralizing and softening equipment and system and method for akalic waste water treatment using the same |
| KR101994404B1 (en) * | 2018-08-29 | 2019-06-28 | 한양수 | Akalic waste water neutralizing and softening equipment and system and method for akalic waste water treatment using the same |
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