JP3059567B2 - Regeneration method of zeolite - Google Patents
Regeneration method of zeoliteInfo
- Publication number
- JP3059567B2 JP3059567B2 JP4029214A JP2921492A JP3059567B2 JP 3059567 B2 JP3059567 B2 JP 3059567B2 JP 4029214 A JP4029214 A JP 4029214A JP 2921492 A JP2921492 A JP 2921492A JP 3059567 B2 JP3059567 B2 JP 3059567B2
- Authority
- JP
- Japan
- Prior art keywords
- zeolite
- slag
- present
- regenerating
- regeneration method
- 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 - Fee Related
Links
Landscapes
- Processing Of Solid Wastes (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は使用済みのゼオライトの
再生方法に関するものである。The present invention relates to a method for regenerating used zeolite.
【０００２】[0002]
【従来の技術】ゼオライトは沸石と呼ばれる鉱物であ
り、 Me2/nO ・Al2O3 ・xSiO2 ・yH2O（Me：アルカリ又
はアルカリ土類、x,y ：係数）の一般式で表される三次
元結晶構造を有する含水アルミノケイ酸鉱物である。こ
のゼオライトは結晶内に多量の水分を含み、加熱したり
減圧するとこの水分を放出し、空になった結晶内に分子
を吸着する能力を持つことで知られている。BACKGROUND OF THE INVENTION Zeolites are minerals called zeolite, Me 2 / n O · Al 2 O 3 · xSiO 2 · yH 2 O (Me: alkaline or alkaline-earth, x, y: coefficient) by the general formula It is a hydrous aluminosilicate mineral having a three-dimensional crystal structure represented. This zeolite is known to contain a large amount of water in the crystal, release this water when heated or depressurized, and has the ability to adsorb molecules into the vacated crystal.
【０００３】このゼオライトは例えば吸着塔などに充填
されて工業的に広く使用されているが、吸着能の低下し
たゼオライトを再生させるにはNaCL等による化学的再生
法が普通である。しかしこの方法によって再生されたゼ
オライトは純度が低下するため、最終的に吸着能を失っ
た大量のゼオライトが発生しており、これらは廃棄処分
されているのが実情である。[0003] This zeolite is widely used industrially, for example, packed in an adsorption tower or the like, but a chemical regeneration method using NaCL or the like is usually used to regenerate zeolite having reduced adsorption capacity. However, since the purity of the zeolite regenerated by this method is reduced, a large amount of zeolite having finally lost the adsorptivity is generated, and these are actually disposed of.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記した従来
の問題点を解消し、吸着能の低下したゼオライトを純度
を低下させることなく再生することができるゼオライト
の再生方法を提供するために完成されたものである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and has been completed in order to provide a method for regenerating a zeolite capable of regenerating a zeolite having reduced adsorption capacity without lowering the purity. It was done.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、使用済みのゼオライトを溶融炉
で溶融して水砕スラグとしたうえ、これにNaOHを加えて
煮沸してゼオライトを生成させることを特徴とするもの
である。以下に本発明を図示の実施例によって更に詳細
に説明する。Means for Solving the Problems According to the present invention made to solve the above-mentioned problems, used zeolite is melted in a melting furnace to form granulated slag, and NaOH is added to the slag to boil it. It is characterized by generating zeolite. Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments.
【０００６】[0006]
【実施例】図１は本発明の実施例のフローシートを示す
ものである。まず各種のゼオライト利用システムから生
じた使用済みゼオライトは、溶融炉を含む溶融システム
１において溶融される。このために専用の溶融システム
１を設けてもよいが、実施例ではこの溶融システム１と
して、下水汚泥の脱水ケーキやその焼却灰をスラグ化す
るために下水処理場において既に稼動しているものを利
用している。FIG. 1 shows a flow sheet according to an embodiment of the present invention. First, spent zeolite generated from various zeolite utilization systems is melted in a melting system 1 including a melting furnace. For this purpose, a dedicated melting system 1 may be provided, but in this embodiment, a melting system 1 which is already operating in a sewage treatment plant for converting a dewatered cake of sewage sludge or its incinerated ash into slag is described. We are using.
【０００７】この溶融システム１の溶融炉において、使
用済みゼオライトは下水汚泥の脱水ケーキやその焼却灰
とともに1300〜1500℃で溶融されてガラス化され、これ
を水中に投入して水砕スラグとされる。その結果、粒径
が数mm〜数10mmの水砕スラグが得られるが、これを必要
に応じて破砕分級する。得られた水砕スラグは結晶部分
がほとんどなく、ゼオライト合成に適したガラス質がほ
ぼ100 ％を占めるものである。これは使用済みのゼオラ
イトのみを溶融した場合にも、下水汚泥の脱水ケーキや
その焼却灰とともに使用済みのゼオライトを溶融した場
合にもかわることはない。In the melting furnace of the melting system 1, the used zeolite is melted at 1300 to 1500 ° C. together with a dewatered cake of sewage sludge and its incineration ash to be vitrified, and is poured into water to form granulated slag. You. As a result, granulated slag having a particle size of several mm to several tens of mm is obtained, which is crushed and classified as necessary. The obtained granulated slag has almost no crystal part and almost 100% vitreous material suitable for zeolite synthesis. This does not change when only the used zeolite is melted or when the used zeolite is melted together with the dewatered sewage sludge cake and its incinerated ash.
【０００８】この水砕スラグは次にゼオライト製造シス
テム２において高濃度NaOHとともに85〜100 ℃で数時間
〜数10時間煮沸される。この結果、水熱合成により新し
くゼオライトが合成されるが、合成されたゼオライトは
数μm 以下の微粉であるのに対して、未反応の水砕スラ
グは数mm〜数10mmの粒径を持つので、ふるい等の分離装
置によって容易に分離することができる。次に合成され
たゼオライトは脱水され、更に100 ℃以上の高温で乾燥
される。このようにして得られたゼオライトは純度が高
く、しかもその吸着能を表示するCEC が市販の合成ゼオ
ライトのCEC(450)とほぼ同等の優れた品質のものであ
る。従って本発明の方法により、使用済みのゼオライト
は完全に再生されたこととなる。The granulated slag is then boiled in a zeolite production system 2 at 85-100 ° C. for several hours to tens of hours with high-concentration NaOH. As a result, a new zeolite is synthesized by hydrothermal synthesis.The synthesized zeolite is fine powder of several μm or less, whereas unreacted granulated slag has a particle size of several mm to several tens of mm. Can be easily separated by a separation device such as a sieve. Next, the synthesized zeolite is dehydrated and further dried at a high temperature of 100 ° C. or more. The zeolite thus obtained has a high purity, and the CEC indicating its adsorptive capacity is of an excellent quality almost equivalent to CEC (450) of a commercially available synthetic zeolite. Therefore, the used zeolite is completely regenerated by the method of the present invention.
【０００９】[0009]
【発明の効果】以上に説明したように、本発明のゼオラ
イトの再生方法によれば、使用済みの吸着能の低下した
ゼオライトを全く純度を低下させることなく何度でも完
全に再生することができ、使用済みゼオライトの廃棄処
分の必要がない。また実施例のように、既存の下水処理
場の下水汚泥の脱水ケーキやその焼却灰をスラグ化する
ための焼却システムを利用すれば、きわめて経済的に本
発明を実施することができる。よって本発明は従来の問
題点を解消したゼオライトの再生方法として、産業の発
展に寄与するところはきわめて大きいものである。As described above, according to the method for regenerating zeolite of the present invention, it is possible to completely regenerate a used zeolite having a reduced adsorption capacity without reducing the purity at all. There is no need to dispose of used zeolite. Further, if an incineration system for converting sewage sludge dewatered cake and incinerated ash of an existing sewage treatment plant into slag is used as in the embodiment, the present invention can be implemented very economically. Therefore, the present invention greatly contributes to industrial development as a method for regenerating zeolite which has solved the conventional problems.
【図１】本発明の実施例を示すフローシートである。FIG. 1 is a flow sheet showing an embodiment of the present invention.
１ 溶融システム ２ ゼオライト製造システム 1 melting system 2 zeolite production system
Claims (2)
て水砕スラグとしたうえ、これにNaOHを加えて煮沸して
ゼオライトを生成させることを特徴とするゼオライトの
再生方法。1. A method for regenerating zeolite, comprising melting used zeolite in a melting furnace to form granulated slag, adding NaOH to the slag, and boiling the slag to form zeolite.
はその焼却灰とともに溶融炉で溶融する請求項１記載の
ゼオライトの再生方法。2. The method for regenerating zeolite according to claim 1, wherein the used zeolite is melted together with sewage sludge or incinerated ash in a melting furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4029214A JP3059567B2 (en) | 1992-02-17 | 1992-02-17 | Regeneration method of zeolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4029214A JP3059567B2 (en) | 1992-02-17 | 1992-02-17 | Regeneration method of zeolite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05220390A JPH05220390A (en) | 1993-08-31 |
| JP3059567B2 true JP3059567B2 (en) | 2000-07-04 |
Family
ID=12269948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4029214A Expired - Fee Related JP3059567B2 (en) | 1992-02-17 | 1992-02-17 | Regeneration method of zeolite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3059567B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000335916A (en) * | 1999-05-31 | 2000-12-05 | Akio Henmi | Method and apparatus for producing artificial zeolite from slag |
| JP5399658B2 (en) * | 2007-08-03 | 2014-01-29 | プロメトロンテクニクス株式会社 | Method for producing artificial zeolite |
| JP5646807B2 (en) * | 2008-03-21 | 2014-12-24 | 株式会社ゼオライト・アーティフィシャル | Method for producing artificial zeolite |
-
1992
- 1992-02-17 JP JP4029214A patent/JP3059567B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05220390A (en) | 1993-08-31 |
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