JPH0355200B2 - - Google Patents
Info
- Publication number
- JPH0355200B2 JPH0355200B2 JP9321487A JP9321487A JPH0355200B2 JP H0355200 B2 JPH0355200 B2 JP H0355200B2 JP 9321487 A JP9321487 A JP 9321487A JP 9321487 A JP9321487 A JP 9321487A JP H0355200 B2 JPH0355200 B2 JP H0355200B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- organic chlorine
- perchlorethylene
- extractor
- solvents
- 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
- 239000010802 sludge Substances 0.000 claims description 53
- 239000002904 solvent Substances 0.000 claims description 34
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 22
- 229910052801 chlorine Inorganic materials 0.000 claims description 22
- 239000000460 chlorine Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 27
- 229950011008 tetrachloroethylene Drugs 0.000 description 27
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000009835 boiling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 2
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- KVIPHDKUOLVVQN-UHFFFAOYSA-N ethene;hydrate Chemical compound O.C=C KVIPHDKUOLVVQN-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、有機塩素系溶剤の再生に伴つて発生
する汚泥、タンカーやタンクローリー等の輸送装
置の洗浄水から溶剤を分離回収する際に発生する
汚泥、更には貯蔵容器等から発生する汚泥等から
有機塩素系溶剤を回収する汚泥の処理方法及び装
置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is directed to the treatment of sludge generated during the regeneration of organic chlorine solvents and generated when solvents are separated and recovered from washing water of transportation equipment such as tankers and tank trucks. The present invention relates to a sludge treatment method and apparatus for recovering organic chlorine solvents from sludge, and furthermore from sludge generated from storage containers and the like.
有機塩素系溶剤を含有する汚泥は従来産業廃棄
物として焼却され管理型埋立て地へ捨てられてい
たが、焼却炉の腐食が著しく、かつ大気汚染を伴
う等の欠点があつた。
Sludge containing organic chlorine solvents has conventionally been incinerated as industrial waste and disposed of in controlled landfills, but this has disadvantages such as severe corrosion in the incinerator and air pollution.
例えば、ドライクリーニングの溶剤として用い
られるパークロルエチレンは、クリーニング排出
汚泥中に重量比で約40〜50％含まれている。 For example, perchlorethylene, which is used as a solvent in dry cleaning, is contained in cleaning discharge sludge in an amount of about 40 to 50% by weight.
この汚泥は、従来産業廃棄物として焼却後管理
型の埋立て地へ捨てることになつているが、最近
パークロルエチレンによる地下水汚染及びその発
ガン性が問題となり、クリーニング排出汚泥を回
収し、安全に処理することがにわかに問題点とな
つてきている。 Conventionally, this sludge has been disposed of as industrial waste in a controlled landfill after incineration, but recently, groundwater contamination due to perchlorethylene and its carcinogenicity have become a problem, so the sludge discharged from cleaning has been collected and safely disposed of. The processing of these materials is suddenly becoming a problem.
汚泥中のパークロルエチレンを回収する方法と
しては、蒸留法が知られており、第２図はパーク
ロルエチレンを含む汚泥からパークロルエチレン
を蒸留する従来の装置の概略図であり、汚泥加熱
タンク２１にパークロルエチレンを含む汚泥を入
れ、加熱器２２で加熱することにより発生したパ
ークロルエチレン蒸気は冷却塔２３に入り、冷却
管２４で冷却され、液体となつて排出管２５から
取出されるようになつている。 Distillation is a known method for recovering perchlorethylene from sludge, and Figure 2 is a schematic diagram of a conventional device for distilling perchlorethylene from sludge containing perchlorethylene. Sludge containing perchlorethylene is put in 21 and heated with a heater 22, and the perchlorethylene vapor generated enters the cooling tower 23, is cooled in the cooling pipe 24, becomes a liquid, and is taken out from the discharge pipe 25. It's becoming like that.
上記のごとき従来の蒸留法では、ある程度まで
蒸発すると、それより内部がパークロルエチレン
の沸点、即ち121.2℃まで温度があがらず、汚泥
内部にパークロルエチレンが残つてしまうという
欠点があつた。 The conventional distillation method described above had the disadvantage that once the sludge evaporated to a certain extent, the temperature inside the sludge did not rise to the boiling point of perchlorethylene, that is, 121.2°C, and perchlorethylene remained inside the sludge.
本発明は前記従来の欠点を解消するためになさ
れたものであり、汚泥中より有機塩素系溶剤を殆
んど全量回収、再利用を可能とし廃棄物による地
下水汚染、大気汚染等の公害防止を計ることを目
的としたものである。
The present invention was made to eliminate the above-mentioned conventional drawbacks, and makes it possible to recover and reuse almost all of the organic chlorine solvents from sludge, thereby preventing pollution such as groundwater contamination and air pollution due to waste. It is intended for measurement.
上記の目的を達成するため、本発明は、有機塩
素系溶剤、例えばトリクロルエチレン、塩化メチ
レン、１−１−１トリクロルエタン及びパークロ
ルエチレン等を含有する汚泥を、それらの有機塩
素系溶剤の沸点以上に加熱しながら撹拌し、汚泥
中に液体で存在している汚泥を細く粉砕すること
で、汚泥を有機塩素系溶剤を容易に分離可能な状
態にする。そして加熱、撹拌によつて発生した有
機塩素系溶剤蒸気の大部分を回収する。密閉容器
内の空間及び汚泥本体内の空間に残留する有機塩
素系溶剤蒸気を、密閉容器内に水蒸気を供給し有
機塩素系溶剤蒸気と置換排出することによつて、
その殆んど全てを回収再利用を可能とした。
In order to achieve the above object, the present invention aims to treat sludge containing organic chlorine solvents, such as trichlorethylene, methylene chloride, 1-1-1 trichloroethane, and perchlorethylene, at the boiling points of those organic chlorine solvents. The sludge is heated and stirred to finely crush the sludge present in liquid form in the sludge, thereby making it possible to easily separate the organic chlorine solvent from the sludge. Most of the organic chlorine solvent vapor generated by heating and stirring is then recovered. The organic chlorine solvent vapor remaining in the space inside the closed container and the space within the sludge body is replaced with organic chlorine solvent vapor by supplying water vapor into the closed container and discharged.
Almost all of it can be recovered and reused.
以下図面を参照して本発明の方法及び装置を適
用した実施例を説明するが、第１図は本発明の一
実施例におけるパークロルエチレン含有汚泥処理
装置の概略系統図である。
Embodiments to which the method and apparatus of the present invention are applied will be described below with reference to the drawings. FIG. 1 is a schematic system diagram of a perchlorethylene-containing sludge treatment apparatus in one embodiment of the present invention.
この装置は、内筒２Ａ、外筒２Ｂからなる２重
槽になつた抽出器２と、冷却器１０に分かれてお
り、抽出器２の内筒２Ａ中に設けた撹拌器９でパ
ークロルエチレンを含む汚泥を撹拌しながら外面
よりの水蒸気Ｓによる加熱によりパークロルエチ
レンの沸点まで温度を上げてパークロルエチレン
蒸気とし、更に汚泥空間中、及び容器空間中に存
在するパークロルエチレン蒸気に置換水蒸気S′を
吹き込み、パークロルエチレン蒸気を全量冷却器
１０に導き凝縮し、パークロルエチレンを回収し
汚泥を処理するものである。 This device is divided into an extractor 2, which is a double tank consisting of an inner cylinder 2A and an outer cylinder 2B, and a cooler 10. While stirring the sludge containing sludge, the temperature is raised to the boiling point of perchlorethylene by heating with water vapor S from the outside surface, and the perchlorethylene vapor is converted into perchlorethylene vapor. S' is blown into the tank, and the perchlorethylene vapor is completely introduced into the cooler 10 and condensed, and the perchlorethylene is recovered and the sludge is treated.
次に、第１図の回収装置によりパークロルエチ
レンを含む汚泥からパークロルエチレンを回収す
る手順を説明すると、まず、水蒸気Ｓの止め弁６
を開け、水蒸気Ｓを約４Kg／cm2の圧力で内筒２Ａ
と外筒２Ｂとの間に供給し加熱する。次に、抽出
器２の蓋１を開け、抽出器２の２重槽の内筒２Ａ
内にパークロルエチレンを含む汚泥を投入し、蓋
１を閉じて密閉する。 Next, to explain the procedure for recovering perchlorethylene from sludge containing perchlorethylene using the recovery device shown in FIG.
Open the inner cylinder 2A and apply water vapor S to the inner cylinder 2A at a pressure of about 4 kg/cm 2.
and the outer cylinder 2B and heated. Next, open the lid 1 of the extractor 2, and open the inner cylinder 2A of the double tank of the extractor 2.
Sludge containing perchlorethylene is put into the container, and the lid 1 is closed to seal the container.
次いで置換水蒸気供給弁１６を開いて内筒２Ａ
内に置換水蒸気を吹き込む。内筒２Ａ内では、減
速装置７付きのモーター８を作動させることによ
り撹拌翼９が作動し、汚泥を撹拌しながら周囲よ
り加熱し、約121度でパークロルエチレン蒸気を
発生し、置換水蒸気と共に冷却器１０に送られ
る。 Next, open the displacement steam supply valve 16 to open the inner cylinder 2A.
Displacement steam is blown into the interior. Inside the inner cylinder 2A, a motor 8 equipped with a speed reducer 7 is activated to activate stirring blades 9, which heats the sludge from the surroundings while stirring it, generating perchlorethylene vapor at approximately 121 degrees, which is then mixed with displacement water vapor. It is sent to the cooler 10.
冷却器１０は冷却水Wcにて水冷されており、
止め弁１１を開けることにより作動し、冷却器１
０で凝縮して液化した水及びパークロルエチレン
は、採取容器に回収される。 The cooler 10 is water-cooled with cooling water Wc,
It is activated by opening the stop valve 11, and the cooler 1
Water and perchlorethylene condensed and liquefied at 0 are collected in a collection container.
なお、内筒２Ａ、外筒２Ｂ間に供給された水蒸
気Ｓはストームトラツプ１５を通り、ドレンＤと
なつて排出される。 The water vapor S supplied between the inner cylinder 2A and the outer cylinder 2B passes through the storm trap 15 and is discharged as a drain D.
また、この２重槽になつた抽出器２に蓋１を介
して投入されたパークロルエチレンを含む汚泥
Mdは、処理された後、撹拌翼９により、処理汚
泥Mcとして蓋１９を取外して排出され、パーク
ロルエチレンを抽出した無機性汚泥として管理型
埋立て地等へ処分される。 In addition, sludge containing perchlorethylene is introduced into the double tank extractor 2 through the lid 1.
After the Md has been treated, it is discharged as treated sludge Mc by the stirring blades 9 by removing the lid 19, and is disposed of in a controlled landfill or the like as inorganic sludge from which perchlorethylene has been extracted.
そこで、実際に実施した例として次にパークロ
ルエチレン含有汚泥についての処理した例を次に
述べる。 Therefore, as an example of actual implementation, an example in which perchlorethylene-containing sludge was treated will be described next.
ａ 抽出容器の大きさ 内容積約25
ｂ 撹拌装置
回転数 17.8R／Ｍ
電動機 100V×0.2kw
ｃ 汚泥投入量 約20（20Kg）
ｄ 投入汚泥の性状（パーク含有率）
15.4％（重量比）
ｅ 加熱温度 149℃
ｆ 加熱水蒸気供給量（3.7Kg／cm2Ｇ）５Kg／Hr
ｇ 置換水蒸気供給量（大気圧） 0.2Kg／Hr
ｈ 冷却水供給量（15℃） 50／Hr
ｉ 処理時間 改正不要
ｊ 処理した汚泥のパークロルエチレン含有量
11mg／Kg
溶出試験濃度 0.036mg／
このデータからわかるように、本発明方法で処
理されたパークロルエチレン含有汚泥は11ppmと
いう極めて少ない残量のパークロルエチレンが残
るだけであることがわかる。a Size of extraction container Internal volume approx. 25 b Stirring device Rotation speed 17.8R/M Electric motor 100V x 0.2kw c Amount of sludge input Approx. 20 (20Kg) d Properties of input sludge (park content)
15.4% (weight ratio) e Heating temperature 149℃ f Heating steam supply amount (3.7Kg/cm 2 G) 5Kg/Hr g Displacement steam supply amount (atmospheric pressure) 0.2Kg/Hr h Cooling water supply amount (15℃) 50 /Hr i Treatment time No revision required j Perchlorethylene content of treated sludge
11 mg/Kg Elution test concentration 0.036 mg/ As can be seen from this data, the perchlorethylene-containing sludge treated by the method of the present invention leaves only an extremely small amount of residual perchlorethylene, 11 ppm.
ところが、従来の単なる加熱撹拌乾燥の場合、
処理容器内の空間及び汚泥本体内の空間に残留す
る有機塩素系溶剤が凝縮し再汚染するために、
1000ppm以下には処理することが不可能であるの
が実情である。 However, in the case of conventional simple heating and stirring drying,
The organic chlorine solvent remaining in the space inside the treatment container and the space inside the sludge body condenses and re-contaminates the sludge.
The reality is that it is impossible to reduce the concentration to less than 1000 ppm.
なお、トリクロロエタン、トリクロロエチレ
ン、塩化メチレン等沸点の低い溶剤を含有する汚
泥を本装置で処理する場合は、加熱蒸気の供給量
を制限することによつて処理温度を制御する。 When treating sludge containing a solvent with a low boiling point such as trichloroethane, trichlorethylene, or methylene chloride with this apparatus, the treatment temperature is controlled by limiting the amount of heated steam supplied.
以上に説明したように、本発明の汚泥処理方法
においては、加熱する抽出器内に撹拌翼をつける
ことにより、汚泥全てをむらなく撹拌し、発生し
た有機塩素系溶剤蒸気は水蒸気と置換されるの
で、汚泥中の有機塩素系溶剤を殆んど抽出でき、
その処理汚泥を有機塩素系溶剤を抽出した無機性
汚泥として埋立て地へ埋めるので、より安全な埋
立てが可能となり、加えて従来のような焼却処理
も不必要なため、焼却時に発生する有毒ガスも出
ないため、大気汚染等公害防止にもなる等多大な
効果がある。
As explained above, in the sludge treatment method of the present invention, all the sludge is evenly stirred by installing a stirring blade in the heating extractor, and the generated organochlorine solvent vapor is replaced with water vapor. Therefore, most of the organic chlorine solvents in the sludge can be extracted.
Since the treated sludge is buried in a landfill as inorganic sludge from which organic chlorine solvents have been extracted, safer landfilling is possible.Furthermore, traditional incineration treatment is not required, so waste materials generated during incineration are eliminated. Since it does not emit poisonous gases, it has great effects such as preventing air pollution and other pollution.
また、有機塩素系溶剤を含んだ汚泥を撹拌しな
がら直接加熱し、かつ置換水蒸気を吹き込むた
め、短時間で効率よく有機塩素系溶剤を回収して
再利用が可能となるので、より確実な汚泥の無害
化ができると共に、経済的である。 In addition, since the sludge containing organochlorine solvents is directly heated while stirring and displacement steam is blown into the sludge, the organochlorine solvents can be efficiently recovered and reused in a short period of time, making the sludge more reliable. It is economical as well as making it harmless.
更に、本発明で特に水蒸気を抽出器内に導入し
たのは、これにより有機塩素系溶剤蒸気を抽出機
内から外に排出する効果を有すると共に、有機塩
素系溶剤蒸気を薄めることによつて抽出器以降の
設備の有機塩素系溶剤による腐食を防止し、かつ
有機塩素系溶剤蒸気の完全排出の後に水蒸気によ
つてきれいに有機塩素系溶剤の付着分を除去する
ことができ、更に抽出器内に水蒸気が残留しても
無害であるという効果を有するからである。 Furthermore, in the present invention, water vapor is introduced into the extractor to have the effect of discharging the organic chlorine solvent vapor from inside the extractor to the outside, and also to dilute the organic chlorine solvent vapor to the extractor. This prevents corrosion of the subsequent equipment due to organochlorine solvents, and allows the adhesion of organochlorine solvents to be removed cleanly with steam after the organochlorine solvent vapor is completely discharged. This is because it has the effect of being harmless even if it remains.
第１図は本発明の一実施例における有機塩素系
溶剤含有汚泥の処理装置の概略系統図であり、ま
た第２図は有機塩素系溶剤を含む汚泥から有機塩
素系溶剤を蒸留する従来の装置の概略図である。
２……抽出器、９……撹拌機、１０……冷却
器、Ｓ……水蒸気、S′……置換水蒸気。
FIG. 1 is a schematic system diagram of an apparatus for treating sludge containing organochlorine solvents in an embodiment of the present invention, and FIG. 2 shows a conventional apparatus for distilling organochlorine solvents from sludge containing organochlorine solvents. FIG. 2...Extractor, 9...Stirrer, 10...Cooler, S...Steam, S'...Displacement steam.
Claims (1)
撹拌し、発生した有機塩素系溶剤蒸気を、抽出器
内に導入した水蒸気と共に冷却器に送つて凝縮さ
せて有機塩素系溶剤を回収する有機塩素系溶剤を
含有する汚泥の処理方法。 ２ 有機塩素系溶剤を含む汚泥を加熱撹拌する抽
出器と、該抽出器内に水蒸気を供給する水蒸気供
給装置と、有機塩素系溶剤蒸気及び水蒸気を凝縮
する冷却器からなる有機塩素系溶剤を含有する汚
泥の処理装置。[Claims] 1. Sludge containing an organic chlorine solvent is heated and stirred in an extractor, and the generated organic chlorine solvent vapor is sent to a cooler together with water vapor introduced into the extractor and condensed to produce organic chlorine. A method for treating sludge containing organic chlorine solvents that recovers the solvents. 2 Contains an organic chlorine solvent consisting of an extractor that heats and stirs the sludge containing the organic chlorine solvent, a steam supply device that supplies water vapor into the extractor, and a cooler that condenses the organic chlorine solvent vapor and water vapor. Sludge processing equipment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27967486 | 1986-11-26 | ||
| JP61-279674 | 1986-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63232898A JPS63232898A (en) | 1988-09-28 |
| JPH0355200B2 true JPH0355200B2 (en) | 1991-08-22 |
Family
ID=17614284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9321487A Granted JPS63232898A (en) | 1986-11-26 | 1987-04-17 | Method and device for treating sludge containing organochlorine solvent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63232898A (en) |
-
1987
- 1987-04-17 JP JP9321487A patent/JPS63232898A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63232898A (en) | 1988-09-28 |
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