JPH11230516A - Method for controlling chlorinated products during waste incineration - Google Patents
Method for controlling chlorinated products during waste incinerationInfo
- Publication number
- JPH11230516A JPH11230516A JP10051570A JP5157098A JPH11230516A JP H11230516 A JPH11230516 A JP H11230516A JP 10051570 A JP10051570 A JP 10051570A JP 5157098 A JP5157098 A JP 5157098A JP H11230516 A JPH11230516 A JP H11230516A
- Authority
- JP
- Japan
- Prior art keywords
- waste
- flue gas
- incineration
- hypophosphorous acid
- dioxins
- 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.)
- Granted
Links
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
(57)【要約】
【課題】 ゴミ焼却場等において廃棄物を焼却処理する
際にダイオキシ類等の塩素化物が生成し、これらの塩素
化物が排煙中に高濃度で含有されている場合があり、近
年大きな問題となっている。排煙中に含まれるダイオキ
シン類の濃度を低下させるため、従来は排煙を活性炭等
の吸着剤に接触させ、ダイオキシン類を吸着除去する方
法が採用されていた。しかしながら、この方法ではダイ
オキン類を吸着した廃吸着剤を高温で処理するための特
別な設備や工程が必要となり、処理コストが高くつくと
いう問題があった。
【解決手段】 本発明は、廃棄物を、亜リン酸類及び／
又は次亜リン酸類の存在下に焼却することを特徴とする
廃棄物焼却処理過程における塩素化物の生成抑制方法で
あり、本発明方法において亜リン酸類及び／又は次亜リ
ン酸類の添加量が０．００１重量％以上となるようにし
て処理することが好ましい。(57) [Summary] [Problem] Chlorinated substances such as dioxygens are generated during incineration of waste in garbage incineration plants, etc., and these chlorinated substances may be contained in high concentrations in flue gas. There is a big problem in recent years. Conventionally, in order to reduce the concentration of dioxins contained in flue gas, a method of contacting flue gas with an adsorbent such as activated carbon to adsorb and remove dioxins has been adopted. However, this method requires a special facility or process for treating the waste adsorbent having adsorbed dioxins at a high temperature, and has a problem that the treatment cost is high. SOLUTION: The present invention relates to a method for converting waste materials into phosphites and / or
Alternatively, it is a method for suppressing the production of chlorinated substances in a waste incineration process characterized by incineration in the presence of hypophosphorous acid. In the method of the present invention, the amount of phosphorous acid and / or hypophosphorous acid added is zero. The treatment is preferably performed so as to be 0.0001% by weight or more.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ゴミ焼却等の廃棄
物焼却処理過程における塩素化物の生成抑制方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for suppressing the generation of chlorinated substances in a waste incineration process such as refuse incineration.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】ゴミ焼
却場等から排出される排煙中には種々の有害物質が含有
されており、このような排煙中に含有される有害物質を
除去するために種々の処理方法が採用されている。しか
しながら、近年、ゴミ焼却場等から排出される排煙中
に、ダイオキシン類（ＰＣＤＤＳ、ＰＣＤＦＳ等）のよ
うな極めて毒性の強い塩素化物が高濃度で含有されてい
る場合があり、大きな社会問題となっている。2. Description of the Related Art Various types of harmful substances are contained in flue gas discharged from garbage incineration plants and the like, and harmful substances contained in such flue gas are removed. For this purpose, various processing methods are employed. However, in recent years, extremely toxic chlorinated substances such as dioxins (PCDDS, PCDFS, etc.) may be contained at a high concentration in flue gas discharged from garbage incineration plants and the like, which poses a major social problem. Has become.
【０００３】ゴミ焼却場において廃棄物を焼却処理して
生じる排煙に含まれる塩素化物濃度を低下させるために
は、通常、排煙中の塩化水素を除去するために行われて
いる、排煙への水酸化カルシウム水溶液の噴霧も、ある
程度は有効であると言われているが、必ずしも充分なも
のとは言えない。このため更に効果的に排煙中の塩素化
物の濃度を低下させる方法が採用されており、例えば廃
ガスを活性炭や活性コークス等の吸着剤と接触させて、
排煙中の塩素化物を吸着除去する方法は、塩素化物の除
去方法としては簡易で効果的な方法であるため、多くの
ゴミ焼却場等において採用されている。しかしながら、
この方法では塩素化物を吸着した廃活性炭の処理が必要
であり、廃活性炭を高温で燃焼処理するための工程増加
による作業コストや、燃焼処理のための設備コストがか
かるという問題があった。[0003] In order to reduce the concentration of chlorinated substances contained in flue gas generated by incinerating waste in a garbage incineration plant, it is common practice to remove hydrogen chloride from the flue gas. Spraying an aqueous solution of calcium hydroxide on water is said to be effective to some extent, but is not always sufficient. For this reason, a method of reducing the concentration of chlorinated substances in flue gas more effectively has been adopted, for example, by contacting waste gas with an adsorbent such as activated carbon or activated coke,
The method of adsorbing and removing chlorinated substances in flue gas is a simple and effective method for removing chlorinated substances, and is therefore used in many garbage incineration plants and the like. However,
In this method, it is necessary to treat the waste activated carbon to which the chlorinated substance is adsorbed, and there is a problem that the operation cost due to an increase in the number of steps for burning the waste activated carbon at a high temperature and the equipment cost for the combustion treatment are increased.
【０００４】本発明は上記従来技術の問題点に鑑みなさ
れたもので、ゴミ焼却場等において廃棄物を焼却処理す
る際に生じる排煙中に含まれる塩素化物濃度を低減化す
ることのできる廃棄物の焼却処理方法を提供することを
目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in consideration of the above-mentioned problems. Therefore, it is possible to reduce the concentration of chlorinated substances contained in flue gas generated when incinerating waste in a garbage incineration plant or the like. An object of the present invention is to provide an incineration method for articles.
【０００５】[0005]
【課題を解決するための手段】即ち、本発明の廃棄物焼
却処理過程における塩素化物の生成抑制方法は、廃棄物
を、亜リン酸類及び／又は次亜リン酸類の存在下に焼却
することを特徴とする。本発明方法において、亜リン酸
類及び／又は次亜リン酸類の添加量が０．００１重量％
以上となるようにして処理することが好ましい。That is, the method for suppressing the production of chlorinated substances in the waste incineration process of the present invention is to incinerate waste in the presence of phosphorous acid and / or hypophosphorous acid. Features. In the method of the present invention, the amount of the phosphorous acid and / or hypophosphorous acid is 0.001% by weight.
Preferably, the treatment is performed as described above.
【０００６】[0006]
【発明の実施の形態】本発明において用いる亜リン酸類
としては、亜リン酸や亜リン酸塩が用いられる。亜リン
酸塩としては、例えば亜リン酸ナトリウム、亜リン酸カ
リウム、亜リン酸カルシウム、亜リン酸マグネシウム、
亜リン酸アンモニウム、亜リン酸水素ナトリウム、亜リ
ン酸水素カリウム、亜リン酸水素カルシウム、亜リン酸
マグネシウム等が挙げられる。これらのうち、亜リン
酸、亜リン酸ナトリウム、亜リン酸カルシウムが好まし
い。上記、亜リン酸や亜リン酸塩は２種以上を混合して
用いることができる。BEST MODE FOR CARRYING OUT THE INVENTION As the phosphites used in the present invention, phosphorous acid or phosphite is used. Examples of the phosphite include sodium phosphite, potassium phosphite, calcium phosphite, magnesium phosphite,
Examples thereof include ammonium phosphite, sodium hydrogen phosphite, potassium hydrogen phosphite, calcium hydrogen phosphite, and magnesium phosphite. Of these, phosphorous acid, sodium phosphite, and calcium phosphite are preferred. The phosphoric acid and the phosphite may be used as a mixture of two or more.
【０００７】また次亜リン酸類としては、次亜リン酸や
次亜リン酸塩が用いられる。次亜リン酸塩としては、次
亜リン酸ナトリウム、次亜リン酸カリウム、次亜リン酸
カルシウム、次亜リン酸マグネシウム、次亜リン酸アン
モニウム等が挙げられ、これらのうち、次亜リン酸、次
亜リン酸ナトリウム、次亜リン酸カルシウムが好まし
い。上記、次亜リン酸や次亜リン酸塩は２種以上を混合
して用いることができる。また亜リン酸類と次亜リン酸
類とは、どちらか一方のみを用いても、両方を混合して
用いても良い。As the hypophosphorous acid, hypophosphorous acid and hypophosphite are used. Examples of the hypophosphite include sodium hypophosphite, potassium hypophosphite, calcium hypophosphite, magnesium hypophosphite, ammonium hypophosphite and the like. Sodium phosphite and calcium hypophosphite are preferred. The above-mentioned hypophosphorous acid and hypophosphite can be used as a mixture of two or more. Further, either one of the phosphorous acid and the hypophosphorous acid may be used, or both may be used as a mixture.
【０００８】本発明方法は、上記亜リン酸類及び／又は
次亜リン酸類の存在下に廃棄物を焼却処理する方法であ
り、廃棄物焼却時に廃棄物に亜リン酸類及び／又は次亜
リン酸類を添加し、必要により添加後、混合してから廃
棄物を焼却処理する。廃棄物に対する亜リン酸類及び／
又は次亜リン酸類の添加量は、廃棄物に添加した際の亜
リン酸類及び／又は次亜リン酸類の添加量として、０．
００１重量％以上となるように添加することが好まし
く、特に０．１重量％以上添加することが好ましい。亜
リン酸類及び／又は次亜リン酸類の添加量の上限は特に
規定されないが、あまり多量に添加しても経済的でない
ため、通常は廃棄物に添加した際の亜リン酸類及び／又
は次亜リン酸類の添加量は２０重量％以下とすることが
好ましい。廃棄物に添加した際の亜リン酸類及び／又は
次亜リン酸類の添加量が０．００１重量％未満である場
合、塩素化物の生成を十分に抑制できない虞れがある。[0008] The method of the present invention is a method of incinerating waste in the presence of the above-mentioned phosphorous acid and / or hypophosphorous acid. When the waste is incinerated, the waste is incinerated with phosphorous acid and / or hypophosphorous acid. And, if necessary, after mixing, incinerate the waste. Phosphorous acid and / or waste
Alternatively, the addition amount of hypophosphorous acid is 0.1% as the addition amount of phosphorous acid and / or hypophosphorous acid when added to waste.
It is preferable to add 001% by weight or more, and it is particularly preferable to add 0.1% by weight or more. The upper limit of the amount of phosphorous acid and / or hypophosphorous acid added is not particularly specified, but it is not economical to add too much, so that phosphorous acid and / or hypophosphorous acid is usually added to waste. It is preferable that the amount of phosphoric acid added be 20% by weight or less. If the amount of the phosphorous acid and / or hypophosphorous acid added to the waste is less than 0.001% by weight, the generation of chlorinated products may not be sufficiently suppressed.
【０００９】廃棄物に亜リン酸類及び／又は次亜リン酸
類を添加混合するには、亜リン酸類及び／又は次亜リン
酸類を含む水溶液又は分散液を廃棄物に散布したり、亜
リン酸類及び／又は次亜リン酸類を粉体のまま廃棄物に
散布し、更に必要により混合器によって十分混合する方
法が挙げられる。In order to add and mix phosphorous acid and / or hypophosphorous acid to waste, an aqueous solution or dispersion containing phosphorous acid and / or hypophosphorous acid is sprayed on the waste, And / or a method in which hypophosphorous acids are sprinkled into waste as powder and further sufficiently mixed by a mixer if necessary.
【００１０】本発明方法において、廃棄物焼却処理の際
に、更に還元剤（例えば金属水素化物類、金属水素錯化
合物、ボラン、ヒドラジン、アルカリ金属アルコール錯
体、アルカリ金属等）を添加しても良い。また廃棄物の
焼却には、通常の焼却装置を用いることができる。In the method of the present invention, a reducing agent (for example, a metal hydride, a metal hydride complex, borane, hydrazine, an alkali metal alcohol complex, an alkali metal, etc.) may be added during the waste incineration treatment. . For incineration of waste, a normal incinerator can be used.
【００１１】[0011]
【実施例】以下、実施例を挙げて本発明を更に詳細に説
明する。 実施例１〜７、比較例１ 家庭ゴミに表１に示す亜リン酸類及び／又は次亜リン酸
類を添加混合した後（但し、比較例１は亜リン酸類や次
亜リン酸類を添加混合せず。）、ゴミ焼却装置によって
家庭ゴミを焼却処理し、生成した排煙中の塩素化物の濃
度を測定した。塩素化物濃度は、厚生省生活衛生局水道
環境部環境整備課「廃棄物処理におけるダイオキシン類
標準測定分析マニュアル」に準じて測定した。また、塩
素化物濃度の測定は、バグフィルター出口において測定
した。結果を表１にあわせて示す。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. Examples 1 to 7 and Comparative Example 1 After adding and mixing phosphorous acid and / or hypophosphorous acid shown in Table 1 to household garbage (however, in Comparative Example 1, phosphorous acid and hypophosphorous acid were added and mixed. ), Household garbage was incinerated by a garbage incinerator, and the concentration of chlorinated substances in the generated flue gas was measured. The chlorinated substance concentration was measured according to the "Standard Manual for Analysis and Analysis of Dioxins in Waste Disposal" in the Environment Improvement Section, Water Supply Department, Ministry of Health and Welfare. The chlorinated product concentration was measured at the outlet of the bag filter. The results are shown in Table 1.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【発明の効果】以上説明したように本発明方法は、廃棄
物を亜リン酸類及び／又は次亜リン酸類の存続下で焼却
処理することにより、排煙中のダイオキシン等の塩素化
物の濃度を低減化することができ、廃棄物の焼却過程に
おいて生じたダイオキシン等を活性炭等の吸着剤によっ
て吸着除去する方法のように、廃吸着剤処理のための特
別な設備や工程が不要であり、低コストで効率良く排煙
中の塩素化物濃度の低減化に貢献できる等の効果があ
る。As described above, the method of the present invention reduces the concentration of chlorinated substances such as dioxins in flue gas by incinerating waste in the presence of phosphorous acid and / or hypophosphorous acid. No special equipment or process for waste adsorbent treatment is required, unlike the method of adsorbing and removing dioxin and the like generated in the waste incineration process using an adsorbent such as activated carbon. There are effects such as being able to efficiently contribute to the reduction of chlorinated substance concentration in flue gas at low cost.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 守屋 雅文 東京都葛飾区堀切４丁目66番１号 ミヨシ 油脂株式会社内 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masafumi Moriya 4-66-1, Horikiri, Katsushika-ku, Tokyo Miyoshi Oil & Fats Co., Ltd.
Claims (2)
ン酸類の存在下に焼却することを特徴とする廃棄物焼却
処理過程における塩素化物の生成抑制方法。1. A method for suppressing the generation of chlorinated substances in a waste incineration process, comprising incinerating waste in the presence of phosphorous acid and / or hypophosphorous acid.
加量が０．００１重量％以上となるようにして処理する
請求項１記載の廃棄物焼却処理過程における塩素化物の
生成抑制方法。2. The method according to claim 1, wherein the treatment is carried out so that the amount of the phosphorous acid and / or hypophosphorous acid is 0.001% by weight or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05157098A JP3985915B2 (en) | 1998-02-17 | 1998-02-17 | Method for suppressing the formation of chlorinated substances in the waste incineration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05157098A JP3985915B2 (en) | 1998-02-17 | 1998-02-17 | Method for suppressing the formation of chlorinated substances in the waste incineration process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11230516A true JPH11230516A (en) | 1999-08-27 |
| JP3985915B2 JP3985915B2 (en) | 2007-10-03 |
Family
ID=12890632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05157098A Expired - Fee Related JP3985915B2 (en) | 1998-02-17 | 1998-02-17 | Method for suppressing the formation of chlorinated substances in the waste incineration process |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3985915B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6490984B1 (en) * | 1998-12-28 | 2002-12-10 | Miyoshi Yushi Kabushiki Kaisha | Method of making flue gas harmless |
-
1998
- 1998-02-17 JP JP05157098A patent/JP3985915B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6490984B1 (en) * | 1998-12-28 | 2002-12-10 | Miyoshi Yushi Kabushiki Kaisha | Method of making flue gas harmless |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3985915B2 (en) | 2007-10-03 |
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