JPH0739840A - Washing method - Google Patents

Washing method

Info

Publication number
JPH0739840A
JPH0739840A JP20584993A JP20584993A JPH0739840A JP H0739840 A JPH0739840 A JP H0739840A JP 20584993 A JP20584993 A JP 20584993A JP 20584993 A JP20584993 A JP 20584993A JP H0739840 A JPH0739840 A JP H0739840A
Authority
JP
Japan
Prior art keywords
expanded graphite
cleaning
oil
water
graphite
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.)
Withdrawn
Application number
JP20584993A
Other languages
Japanese (ja)
Inventor
Shoichi Matsunami
省一 松波
Sadahiro Izumisawa
貞弘 泉沢
Haruo Sakagami
春雄 坂上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Kasei Chemical Co Ltd
Original Assignee
Nippon Kasei Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Kasei Chemical Co Ltd filed Critical Nippon Kasei Chemical Co Ltd
Priority to JP20584993A priority Critical patent/JPH0739840A/en
Publication of JPH0739840A publication Critical patent/JPH0739840A/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Cleaning In General (AREA)

Abstract

PURPOSE:To easily peel the oils sticking to solids from their surfaces and to exhibit an excellent washing effect by blowing with hydrophobic materials. CONSTITUTION:Water is passed through a mixing piping by driving of a water supplying pump and is maintained in a pressurized state by driving of a compressor to supply the expanded graphite in an expanded graphite supplying vessel to the mixing piping. A water slurry 40 of the expanded graphite prepd. in the mixing piping is supplied to a washing device 16 set at a storage tank 15. The water slurry 40 of the expanded graphite is blown from a nozzle disposed around a washing pipe 17 over the entire surface of an inside wall 151 of the storage tank 15. The water slurry flows down on the inside wall surface and is stored on the bottom of the storage tank 15. The expanded graphite is brought into contact with the oil sticking to the inside wall 151 by such blowing, by which the oil is absorbed therein. The water slurry 50 of the expanded graphite stored in the bottom of the storage tank 15 is recovered through a flexible pipe 18 from a manhole 152 for oil draining in the lower part of the side wall.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、洗浄方法に関するもの
であり、詳しくは、油類などの疎水性物質の洗浄方法で
あって、被洗浄物からの油類などを剥離する洗浄効果に
優れ、しかも、洗浄後の二次汚染の問題が少ない新規な
洗浄材を用いた洗浄方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method, and more particularly to a method for cleaning a hydrophobic substance such as oils, which is excellent in cleaning effect of peeling oils or the like from an object to be cleaned. Moreover, the present invention relates to a cleaning method using a novel cleaning material which has less problems of secondary contamination after cleaning.

【0002】[0002]

【従来の技術】例えば、油類を代表とする疎水性物質の
貯蔵用タンクにおいて、液抜き後に当該タンク内の内面
に付着した疎水性物質を洗浄する場合、通常、界面活性
剤の水溶液をスプレーする方法が採用される。なお、以
下、「油類」で疎水性物質を総称する。
2. Description of the Related Art For example, in a tank for storing a hydrophobic substance typified by oils, when the hydrophobic substance attached to the inner surface of the tank is washed after draining the liquid, an aqueous solution of a surfactant is usually sprayed. The method of doing is adopted. In the following, "oils" are collectively referred to as hydrophobic substances.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、上記の
様な洗浄方法では、油類、界面活性剤および水を含む洗
浄廃液の処理が問題となる。本発明は、上記実情に鑑み
なされたものであり、その目的は、洗浄材の後処理が極
めて容易で工業的に有利な洗浄方法を提供することにあ
る。
However, in the above-mentioned cleaning method, the treatment of a cleaning waste liquid containing oils, surfactants and water poses a problem. The present invention has been made in view of the above circumstances, and an object thereof is to provide a cleaning method that is extremely easy to post-process a cleaning material and is industrially advantageous.

【0004】本発明者等は、上記の目的を達成すべく種
々検討を重ねた結果、次の様な知見を得た。すなわち、
本発明者等は、特開平4−22403号公報によって、
油類などの液状物質を膨張黒鉛と接触させて膨張黒鉛に
液状物質を吸収して処理する方法を既に提案している
が、ここに用いた膨張黒鉛は、意外にも、固体表面から
油類を吸収した後に優れた離型性を有し、それがため
に、固体表面から付着した油類を容易に剥離して優れた
洗浄効果を発揮し得る。
As a result of various studies conducted by the present inventors in order to achieve the above object, the following findings were obtained. That is,
The inventors of the present invention disclosed in Japanese Patent Laid-Open No. 4-22403
We have already proposed a method in which a liquid substance such as oils is brought into contact with expanded graphite to absorb the liquid substance into the expanded graphite and treated. Has excellent releasability after absorbing the oil, which makes it possible to easily peel off the oils adhering from the solid surface to exert an excellent cleaning effect.

【0005】[0005]

【課題を解決するための手段】本発明は、上記の知見に
基づき完成されたものであり、その要旨は、疎水性物質
の付着した被洗浄物に膨張黒鉛から成る洗浄材を吹き付
けることを特徴とする疎水性物質の洗浄方法に存する。
The present invention has been completed based on the above findings, and its gist is that a cleaning material made of expanded graphite is sprayed onto an object to be cleaned to which a hydrophobic substance is attached. And a method for cleaning a hydrophobic substance.

【0006】以下、本発明を詳細に説明する。本発明の
洗浄方法においては、膨張黒鉛から成る洗浄材を用い
る。そして、膨張黒鉛を油類の付着した被洗浄物に吹き
付け、固体表面に付着した油類を膨張黒鉛によって剥離
して除去することにより、固体表面の洗浄を行う。従っ
て、水面に浮上している油類に膨張黒鉛を供給して接触
させることにより、膨張黒鉛に油類を吸収させて油類を
処理する特開平4−22403号公報に記載の方法と
は、膨張黒鉛の使用態様が異なり、また、膨張黒鉛の作
用効果も同一ではない。
The present invention will be described in detail below. In the cleaning method of the present invention, a cleaning material made of expanded graphite is used. Then, the expanded graphite is sprayed onto the object to be cleaned to which the oils are adhered, and the oils adhered to the solid surface are separated and removed by the expanded graphite to clean the solid surface. Therefore, by supplying expanded graphite to the oils floating on the water surface and bringing them into contact with each other, the method described in JP-A-4-22403, in which the expanded graphite absorbs the oils to process the oils, The usage of expanded graphite is different, and the effects of expanded graphite are not the same.

【0007】しかしながら、本発明の洗浄材を構成する
膨張黒鉛としては、特開平4−22403号公報に記載
の膨張黒鉛と同様の膨張黒鉛を用いることが出来る。な
お、本明細書において、膨張黒鉛とは、熱膨張性黒鉛を
加熱膨張して得られる黒鉛を指す。上記の熱膨張性黒鉛
としては、膨張性が高く膨張後に嵩高の膨張黒鉛を形成
するものであれば、その種類は制限されず、天然黒鉛、
熱分解黒鉛、キッシュ黒鉛などの原料黒鉛を例えば硫酸
と酸化剤との混合物で処理した後、水洗、乾燥して得ら
れる熱膨張性黒鉛を用いることが出来る。斯かる熱膨張
性黒鉛は、既に、工業的に利用されているので容易に入
手することが出来る。
However, as the expansive graphite constituting the cleaning material of the present invention, the same expansive graphite as the expansive graphite described in JP-A-4-22403 can be used. In the present specification, expanded graphite refers to graphite obtained by heating and expanding thermally expandable graphite. As the above-mentioned thermally expandable graphite, the type is not limited as long as it forms a highly expanded graphite after expansion with high expandability, natural graphite,
A thermally expansive graphite obtained by treating raw graphite such as pyrolytic graphite or Kish graphite with a mixture of sulfuric acid and an oxidizing agent, washing with water and drying can be used. Such heat-expandable graphite is already industrially used, and thus can be easily obtained.

【0008】熱膨張性黒鉛は、約500℃以上に急激に
加熱することにより、C軸方向に数10〜数100倍に
膨張する性質を有する。本発明で用いられる熱膨張性黒
鉛は、原料黒鉛および製造方法には特別な制限はない
が、その特性として、1000℃で10秒間、急激に加
熱した際、25〜300cc/g程度の膨張度を有する
熱膨張性黒鉛が好ましい。そして、膨張後の嵩密度(膨
張黒鉛の嵩密度)は、通常、0.003〜0.04g/
cc程度である。
[0008] The thermally expansive graphite has the property of expanding several tens to several hundred times in the C-axis direction when it is rapidly heated to about 500 ° C or higher. The heat-expandable graphite used in the present invention is not particularly limited in the raw material graphite and the production method, but the characteristic is that the expansion degree thereof is about 25 to 300 cc / g when rapidly heated at 1000 ° C. for 10 seconds. Thermally expandable graphite having a is preferable. The bulk density after expansion (bulk density of expanded graphite) is usually 0.003 to 0.04 g /
It is about cc.

【0009】なお、上記の膨張度は、1000℃に保持
された電気炉内に10分以上放置して加熱された150
ccの石英ビーカーを炉外に取り出し、直ちにこれに熱
膨張性黒鉛0.5gを投入し、同じく1000℃に保持
された電気炉内に素早く入れ、そのまま10秒間放置し
た後、炉外に取り出し、次いで、自然冷却した後の膨張
黒鉛の容積/重量比(単位:cc/g)を意味する。
The above-mentioned expansion degree is 150 after being left in an electric furnace maintained at 1000 ° C. for 10 minutes or more.
The quartz beaker of cc was taken out of the furnace, 0.5 g of the heat-expandable graphite was immediately put in the beaker, and the beaker was quickly put in the electric furnace also kept at 1000 ° C. and left as it was for 10 seconds, then taken out of the furnace. Next, it means the volume / weight ratio (unit: cc / g) of the expanded graphite after being naturally cooled.

【0010】上記の様な熱膨張性黒鉛は、例えば、原料
黒鉛を約20〜150メッシュに粉砕した後、45℃以
下の温度条件下で98%濃硫酸と60%過酸化水素水の
混合物と10〜30分接触させ、次いで、水洗、乾燥を
行うことにより製造することが出来る。
The heat-expandable graphite as described above is obtained, for example, by crushing the raw material graphite to about 20 to 150 mesh and then adding a mixture of 98% concentrated sulfuric acid and 60% hydrogen peroxide under a temperature condition of 45 ° C. or lower. It can be produced by contacting for 10 to 30 minutes, followed by washing with water and drying.

【0011】本発明の洗浄材を構成する膨張黒鉛は、熱
膨張性黒鉛を約500℃以上に急激に加熱することによ
り得られる。この様にして得られた嵩高の膨張黒鉛は、
黒鉛の層状結晶がC軸方向に膨張し、且つ、広がった黒
鉛結晶の空隙が極めて大きく、従って、各種の疎水性物
質を吸収することが出来る。そして、その吸収能は、
(吸収後重量)/(吸収前重量)を以て表現した場合、
例えば、C重油では約50〜80、四塩化炭素では約7
0〜100程度の値となる。また、膨張黒鉛は、固体表
面から油類を吸収した後に優れた離型性を有し、それが
ために、固体表面に付着した油類を容易に剥離して優れ
た洗浄効果を発揮し得る。
The expansive graphite constituting the cleaning material of the present invention is obtained by rapidly heating the thermally expansive graphite to about 500 ° C. or higher. The bulky expanded graphite thus obtained is
The layered crystal of graphite expands in the C-axis direction, and the voids of the expanded graphite crystal are extremely large, and therefore various hydrophobic substances can be absorbed. And its absorption capacity is
When expressed by (weight after absorption) / (weight before absorption),
For example, about 50 to 80 for C heavy oil and about 7 for carbon tetrachloride.
The value is about 0 to 100. In addition, expanded graphite has excellent releasability after absorbing oils from the solid surface, which makes it possible to easily exfoliate oils adhering to the solid surface and exhibit an excellent cleaning effect. .

【0012】また、本発明においては、洗浄材として、
親水性液体を保持した膨張黒鉛を用いることも出来る。
斯かる膨張黒鉛は、嵩高で極めて軽い粉体である膨張黒
鉛それ自体に比して取り扱い易い利点がある。親水性液
体としては、水自体の他、エチルアルコール、プロピル
アルコール、ブチルアルコール等の低級アルコール、グ
リセリン、ポリエチレングリコール、エチレングリコー
ル等の多価アルコール、水や低級アルコール等に無機塩
類を溶解した親水性溶液など挙げられる。
Further, in the present invention, as the cleaning material,
Expanded graphite holding a hydrophilic liquid can also be used.
Such expanded graphite has an advantage that it is easy to handle as compared with expanded graphite itself which is a bulky and extremely light powder. As the hydrophilic liquid, in addition to water itself, lower alcohols such as ethyl alcohol, propyl alcohol, butyl alcohol, polyhydric alcohols such as glycerin, polyethylene glycol, ethylene glycol, etc., hydrophilicity obtained by dissolving inorganic salts in water, lower alcohols, etc. Examples include solutions.

【0013】上記の無機塩類としては、硫酸ナトリウ
ム、硫酸アンモニウム、硫酸カリウム、硫酸マグネシウ
ム等の硫酸塩、塩化ナトリウム、塩化アンモニウム、塩
化カリウム、塩化マグネシウム等の塩化物などが用いら
れる。特に、多価アルコールは、保管時の揮散が少ない
ために好適である。
As the above-mentioned inorganic salts, sulfates such as sodium sulfate, ammonium sulfate, potassium sulfate and magnesium sulfate, chlorides such as sodium chloride, ammonium chloride, potassium chloride and magnesium chloride are used. In particular, polyhydric alcohol is suitable because it is less volatile during storage.

【0014】膨張黒鉛に親水性液体を保持(付着もしく
は吸着)させる方法としては、親水性液体に膨張黒鉛を
浸漬する方法、膨張黒鉛に親水性液体を噴霧する方法な
どが挙げられる。また、親水性液体の保持量は、通常、
膨張黒鉛1gに対し親水性液体1〜50g程度である。
嵩高で極めて軽い粉体であるために取り扱いが困難であ
る従来の膨張黒鉛と異なり、親水性液体を保持した膨張
黒鉛は、取り扱いが容易である。勿論、油類に対する吸
収能力は、親水性液体の保持によって損なわれることは
ない。
Examples of the method for holding (attaching or adsorbing) the hydrophilic liquid to the expanded graphite include a method of immersing the expanded graphite in the hydrophilic liquid and a method of spraying the expanded graphite with the hydrophilic liquid. The amount of hydrophilic liquid retained is usually
The amount of hydrophilic liquid is about 1 to 50 g per 1 g of expanded graphite.
Unlike conventional expanded graphite, which is difficult to handle because it is a bulky and extremely light powder, expanded graphite that holds a hydrophilic liquid is easy to handle. Of course, the absorption capacity for oils is not impaired by the retention of the hydrophilic liquid.

【0015】ところで、上記の膨張黒鉛は、層状結晶の
間に存在し又は表面に付着した酸のために酸性物質とな
っており、その懸濁水のPHは4〜5である。斯かる酸
性物質の膨張黒鉛をそのまま洗浄材として用いた場合
は、被洗浄物質が酸に侵され、また、膨張黒鉛を水スラ
リーとして用いる場合は、その調製や保管の際に容器が
酸によって侵され、更には、膨張黒鉛の水スラリーを被
洗浄物に噴霧する場合は、その酸性ミストによって作業
環境が悪化する等の問題がある。
By the way, the expanded graphite is an acidic substance due to the acid existing between the layered crystals or adhering to the surface, and the pH of the suspension water is 4 to 5. When the expanded graphite of such an acidic substance is used as it is as a cleaning material, the substance to be cleaned is attacked by acid, and when the expanded graphite is used as a water slurry, the container is attacked by acid during its preparation and storage. In addition, when the water slurry of expanded graphite is sprayed on the object to be cleaned, there is a problem that the working environment is deteriorated by the acidic mist.

【0016】本発明においては、上記の様な使用上の問
題を回避するために、懸濁水のPHが約6〜8となる様
に中和処理した膨張黒鉛を用いることが出来る。ここ
に、懸濁水のPHは、純粋100ccを入れた300c
cのビーカーに膨張黒鉛1.0gを投入し、常温におい
て、マグネテイツクスターラーで10分間攪拌処理した
後に測定したPHを指す。
In the present invention, in order to avoid the above problems in use, it is possible to use expanded graphite which has been neutralized so that the pH of the suspension water is about 6-8. Here, the pH of the suspension water is 300c containing 100cc of pure water.
1.0 g of expanded graphite was put into a beaker of c, and the pH was measured after stirring for 10 minutes with a magnetic stirrer at room temperature.

【0017】上記の様な膨張黒鉛は、原料黒鉛を強酸の
存在下に酸化処理した後、水洗、乾燥して得られる熱膨
張性黒鉛を中和処理するか、または、斯かる熱膨張性黒
鉛を約500℃以上に急激に加熱することにより得られ
る膨張黒鉛を中和処理することによって得られる。しか
しながら、本発明においては、膨張黒鉛を中和処理する
方法が好ましく採用される。
The expansive graphite as described above is obtained by subjecting the raw graphite to an oxidation treatment in the presence of a strong acid, followed by washing with water and drying to neutralize the heat-expandable graphite, or the heat-expandable graphite. Is obtained by subjecting the expanded graphite obtained by rapidly heating the above to about 500 ° C. or above. However, in the present invention, a method of neutralizing expanded graphite is preferably adopted.

【0018】中和剤としては、アルカリ水性液体または
アンモニアが用いられ、アルカリ水性液体としては、ア
ルカリ性物質の水溶液またはアルコール溶液が用いられ
る。アルカリ性物質としては、Na、K、Mg、Ca、
Ba等の水酸化物が好適であり、その濃度は、通常1〜
30重量%の範囲とされる。そして、中和処理は、膨張
黒鉛をアルカリ水性液体中に投入して攪拌するか又は膨
張黒鉛をアンモニアガス中で流動させることによって行
うことが出来る。特に、中和剤としてアルカリ水性液体
を用いる方法は、中和と同時に前記の親水性液体を保持
した湿潤膨張黒鉛を得ることが出来るので好ましい。
An alkaline aqueous liquid or ammonia is used as the neutralizing agent, and an aqueous solution or alcohol solution of an alkaline substance is used as the alkaline aqueous liquid. As the alkaline substance, Na, K, Mg, Ca,
A hydroxide such as Ba is suitable, and its concentration is usually 1 to
The range is 30% by weight. Then, the neutralization treatment can be carried out by introducing the expanded graphite into an alkaline aqueous liquid and stirring it, or by flowing the expanded graphite in an ammonia gas. In particular, the method of using an alkaline aqueous liquid as the neutralizing agent is preferable because it is possible to obtain the wet expanded graphite holding the hydrophilic liquid at the same time as the neutralization.

【0019】本発明の洗浄方法において、前記の膨張黒
鉛は油類の付着した被洗浄物に吹き付けられる。膨張黒
鉛の吹き付け手段としては、適当な流体をキャリヤーと
してその中に膨張黒鉛を同伴させることによって行う。
上記のキャリヤーとしては、空気などの気体、水などの
液体が用いられる。そして、通常、親水性液体を保持し
た膨張黒鉛から成る洗浄材の場合は気体キャリヤーが用
いられ、膨張黒鉛単独から成る洗浄材の場合は液体キャ
リヤーが用いられる。また、必要に応じ、気液混合のキ
ャリヤーを用いてもよい。
In the cleaning method of the present invention, the expanded graphite is sprayed onto the object to be cleaned to which oils are attached. The expansive graphite is sprayed by using a suitable fluid as a carrier and entraining the expansive graphite in the carrier.
A gas such as air or a liquid such as water is used as the carrier. In general, a gas carrier is used in the case of a cleaning material composed of expanded graphite that holds a hydrophilic liquid, and a liquid carrier is used in the case of a cleaning material composed of expanded graphite alone. Moreover, you may use the carrier of gas-liquid mixing as needed.

【0020】本発明の洗浄方法が適用される固体表面と
しては、金属表面、プラスチック表面、ガラス表面、コ
ンクリート表面が挙げられ、油類としては、重油、機械
油、切削油、油脂、グリースの他、四塩化炭素などが挙
げられる。具体的な被洗浄物の例としては、油で汚れた
作業機械、油の付着した機械加工品、油の貯蔵タンクの
内面、プラスチック又はガラス性の油用容器、油で汚染
された各種の工作物や建造物(岸壁、テトラポット等)
が挙げられる。
The solid surface to which the cleaning method of the present invention is applied includes a metal surface, a plastic surface, a glass surface and a concrete surface. Examples of oils include heavy oil, machine oil, cutting oil, oils and greases. , Carbon tetrachloride and the like. Specific examples of objects to be cleaned include work machines that are soiled with oil, machined products that have oil on them, the inner surface of oil storage tanks, plastic or glass oil containers, and various types of work that are contaminated with oil. Objects and structures (quays, tetrapots, etc.)
Is mentioned.

【0021】また、例えば、油脂やグリース等の常温で
固体の油類が付着している被洗浄物の場合は、予め、被
洗浄物の表面に熱風を吹き付ける等の適当な方法で被洗
浄物の表面を加熱し、付着した油類に流動性を与えてか
ら本発明の洗浄方法が適用される。
Further, for example, in the case of an object to be cleaned to which solid oils such as oil and grease are attached at room temperature, the object to be cleaned is previously sprayed with hot air or the like by a suitable method. The surface is heated to impart fluidity to the adhered oils, and then the cleaning method of the present invention is applied.

【0022】[0022]

【実施例】次に、添付図面に基づき本発明の洗浄方法の
実施例について明する。図1は、油(C重油)の貯蔵タ
ンクにおいて、油抜き後に当該タンク内の内面に付着し
た油を洗浄する方法の一例を示す部分説明図であり、膨
張黒鉛の水スラリー調製工程を示し、図2は、図1と同
様の部分説明図であり、洗浄工程を示し、図3は、図1
と同様の部分説明図であり、油を吸収した膨張黒鉛の回
収工程を示し、図4は、油を吸収した膨張黒鉛の回収工
程の他の一例を示す部分説明図である。なお、洗浄材を
構成する膨張黒鉛は、次の方法で得られたものを用い、
また、その吸油試験の結果は次の通りであった。
Embodiments of the cleaning method of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a partial explanatory view showing an example of a method for cleaning oil adhering to the inner surface of the oil (C heavy oil) storage tank after oil removal, showing a water slurry preparation process of expanded graphite, FIG. 2 is a partial explanatory view similar to FIG. 1, showing a cleaning step, and FIG.
FIG. 4 is a partial explanatory view similar to FIG. 4, showing a recovery step of expanded graphite that has absorbed oil, and FIG. 4 is a partial explanatory view illustrating another example of a recovery step of expanded graphite that has absorbed oil. The expansive graphite that constitutes the cleaning material uses the one obtained by the following method,
The results of the oil absorption test were as follows.

【0023】<膨張黒鉛の製造>先ず、固定炭素分90
%、灰分8%であるカナダ産の天然燐片状黒鉛(粒度:
36メッシュ〜80メッシュ)を酸処理し、水洗、乾燥
して熱膨張性黒鉛を得た。次いで、電気炉内で予め10
00℃に加熱された石英容器内に上記の熱膨張性黒鉛を
投入し、同じく1000℃に保持された電気炉内に素早
く入れ、そのまま10秒間放置した後、炉外に取り出
し、自然冷却して膨張黒鉛を得た。膨張度は210cc
/gであり、得られた膨張黒鉛の嵩密度は0.0048
g/ccであった。
<Production of expanded graphite> First, fixed carbon content 90
%, Ash content 8%, Canadian natural flake graphite (particle size:
36 mesh to 80 mesh) was treated with acid, washed with water and dried to obtain thermally expandable graphite. Then, 10 in advance in the electric furnace
The above-mentioned thermally expandable graphite was put into a quartz container heated to 00 ° C, quickly put into an electric furnace also held at 1000 ° C, left as it was for 10 seconds, then taken out of the furnace and naturally cooled. Expanded graphite was obtained. Expansion degree is 210cc
/ G, the bulk density of the obtained expanded graphite is 0.0048
It was g / cc.

【0024】<吸油試験>上記の膨張黒鉛を一定量サン
プリングして水中にて攪拌した後、100メッシュの金
網で濾し取って湿潤膨張黒鉛とした。300cc(直径
7cm)のガラス製ビーカーに150ccの水を入れ、
その上に25gのC重油を添加した。C重油は、ほぼ完
全に水面上に浮上している様に観察された。次いで、上
記の湿潤膨張黒鉛25.5g(膨張黒鉛の量は0.5
g)を油面に散布した。このとき、湿潤膨張黒鉛は完全
に油面を覆っていた。
<Oil Absorption Test> A fixed amount of the above expanded graphite was sampled, stirred in water, and then filtered through a 100 mesh wire mesh to obtain wet expanded graphite. Add 150 cc of water to a 300 cc (7 cm diameter) glass beaker,
On top of that was added 25 g of C heavy oil. The C heavy oil was observed to be almost completely floated above the water surface. Next, 25.5 g of the above-mentioned wet expanded graphite (the amount of expanded graphite is 0.5
g) was sprayed on the oil surface. At this time, the wet expanded graphite completely covered the oil surface.

【0025】次いで、ビーカーを手に持ち、ビーカー全
体を2分間軽く揺すり、油と湿潤膨張黒鉛との接触を促
進させたところ、湿潤膨張黒鉛は、油を吸収しながら互
いに凝集して直径が約5cmの塊状物となった。この塊
状物を100メッシュの金網で濾し取り、10分間放置
し、金網から落下する液滴がなくなってから重量を測定
した結果、25.5gであった(すなわち、湿潤膨張黒
鉛中の水の全量がC重油に置換されていた)。
Then, the beaker was held in the hand, and the whole beaker was shaken lightly for 2 minutes to promote contact between the oil and the wet expanded graphite. It became a lump of 5 cm. This lump was filtered with a 100-mesh wire net, left standing for 10 minutes, and weighed after there were no droplets falling from the wire net, and the result was 25.5 g (that is, the total amount of water in the wet expanded graphite). Was replaced with C heavy oil).

【0026】膨張黒鉛の水スラリー調製工程は、水供給
ポンプの吐出側に連結された混合配管内に膨張黒鉛を供
給して膨張黒鉛の水スラリーを調製する工程である。す
なわち、膨張黒鉛の水スラリー調製工程は、図1に示す
様に、混合配管(11)、水供給ポンプ(10)、膨張
黒鉛供給容器(12)及びコンプレッサ(13)を備え
ている。
The step of preparing expanded graphite water slurry is a step of preparing expanded graphite water slurry by supplying expanded graphite into the mixing pipe connected to the discharge side of the water supply pump. That is, as shown in FIG. 1, the expanded graphite water slurry preparation step includes a mixing pipe (11), a water supply pump (10), an expanded graphite supply container (12), and a compressor (13).

【0027】水供給ポンプ(10)は、その吸引側に吸
引配管(101)を備え、その吐出側に吐出配管(10
2)を備えている。混合配管(11)は、吐出配管(1
02)を介して水供給ポンプ(10)の吐出側に連結さ
れている。膨張黒鉛供給容器(12)の底部には、配管
(121)が連結され、配管(121)の途中にはロー
タリーバルブ(122)が配置され、配管(121)の
先端は混合配管(11)の内部に開口されている。
The water supply pump (10) has a suction pipe (101) on its suction side and a discharge pipe (10) on its discharge side.
2) is provided. The mixing pipe (11) is connected to the discharge pipe (1
02) is connected to the discharge side of the water supply pump (10). A pipe (121) is connected to the bottom of the expanded graphite supply container (12), a rotary valve (122) is arranged in the middle of the pipe (121), and the tip of the pipe (121) is connected to the mixing pipe (11). It is opened inside.

【0028】膨張黒鉛供給容器(12)とコンプレッサ
(13)とは加圧空気供給配管(131)にて連結され
ている。なお、上記のロータリーバルブ(122)の代
わりに、スクリューを配置して配管(121)をスクリ
ューフィーダーにすることも出来る。
The expanded graphite supply container (12) and the compressor (13) are connected by a pressurized air supply pipe (131). Instead of the rotary valve (122) described above, a screw may be arranged and the pipe (121) may be used as a screw feeder.

【0029】水供給ポンプ(10)の駆動により、混合
配管(11)に水を供給し、コンプレッサ(13)の駆
動により、膨張黒鉛供給容器(12)の内部を加圧状態
に維持し、そして、膨張黒鉛供給容器(12)内の膨張
黒鉛(30)を配管(121)を通して混合配管(1
1)内に供給する。混合配管(11)内にて調製された
膨張黒鉛の水スラリー(40)は、水供給ポンプ(1
0)の吐出圧により、混合配管(11)の吐出口(11
1)及び配管(14)を通し、貯蔵タンク(15)にセ
ットされた洗浄装置(16)に供給される。
The water supply pump (10) is driven to supply water to the mixing pipe (11), the compressor (13) is driven to maintain the inside of the expanded graphite supply container (12) in a pressurized state, and The expanded graphite (30) in the expanded graphite supply container (12) through the pipe (121) to the mixing pipe (1
1) Supply inside. The expanded graphite water slurry (40) prepared in the mixing pipe (11) is used in the water supply pump (1
The discharge pressure of (0) causes the discharge port (11) of the mixing pipe (11) to
It is supplied to the cleaning device (16) set in the storage tank (15) through 1) and the pipe (14).

【0030】洗浄工程は、膨張黒鉛の水スラリーを洗浄
パイプに設けられたノズルから油貯蔵タンクの内壁面に
吹き付ける工程である。すなわち、洗浄工程は、洗浄装
置(16)を備えており、当該洗浄装置は、図2に示す
様に、貯蔵タンク(15)の上部のマンホールにセット
され、昇降および回転可能になされた洗浄パイプ(1
7)から主として構成されている。
The cleaning step is a step of spraying an expanded graphite water slurry onto the inner wall surface of the oil storage tank from a nozzle provided in the cleaning pipe. That is, the cleaning process includes a cleaning device (16), and the cleaning device is set in a manhole above the storage tank (15) as shown in FIG. (1
It is mainly composed of 7).

【0031】膨張黒鉛の水スラリー(40)は、洗浄パ
イプ(17)の周囲に設けられたノズルからを貯蔵タン
ク(15)の内壁(151)の全面に吹き付けられ、内
壁面を流下して貯蔵タンク(15)の底部に貯留され
る。斯かる吹き付けにより、膨張黒鉛は、内壁(15
1)に付着した油と接触して油を吸収する。
The expanded graphite water slurry (40) is sprayed from the nozzle provided around the cleaning pipe (17) onto the entire inner wall (151) of the storage tank (15) and flows down the inner wall surface for storage. It is stored at the bottom of the tank (15). Due to such spraying, the expanded graphite becomes
Contact with the oil adhering to 1) to absorb the oil.

【0032】貯蔵タンク(15)の底部に貯留された膨
張黒鉛の水スラリー(50)は、次の回収工程におい
て、貯蔵タンク(15)の側壁下部に設けられた油抜き
用マンホール(152)からフレキシブルパイプ(1
8)を通して回収される。
The expanded graphite water slurry (50) stored at the bottom of the storage tank (15) is discharged from the oil removing manhole (152) provided at the lower portion of the side wall of the storage tank (15) in the next recovery step. Flexible pipe (1
It is collected through 8).

【0033】回収工程は、油を吸収した膨張黒鉛を水と
共に回収する工程である。すなわち、回収工程は、図3
に示す様に、密閉タンク(19)と真空ポンプ(20)
を備えている。
The recovery step is a step of recovering the expanded graphite that has absorbed oil together with water. That is, the recovery process is as shown in FIG.
As shown in, a closed tank (19) and a vacuum pump (20)
Is equipped with.

【0034】密閉タンク(19)は、左右に配置された
架台(21)、(21)によって懸垂状態に支持され、
ハンドル(211)によって横転可能に構成されてい
る。また、密閉タンク(19)の内部は、網状体(19
1)によって上下に分割され、その上部には蓋(19
2)が設けられ、その底部には、水抜き配管(193)
が設けられている。
The closed tank (19) is supported in a suspended state by racks (21), (21) arranged on the left and right,
The handle (211) is configured to be able to roll over. Further, the inside of the closed tank (19) has a mesh body (19
1) divided into upper and lower parts, and a lid (19
2) is provided, and a drainage pipe (193) is provided at the bottom thereof.
Is provided.

【0035】そして、密閉タンク(19)の側壁上部に
は、油抜き用マンホール(152)に挿入されたフレキ
シブルパイプ(18)に接続される開口(194)が設
けられ、また、側壁上部の他の部位には、真空ポンプ
(20)の吸引配管(196)に接続される開口(19
5)が設けられている。
An opening (194) connected to the flexible pipe (18) inserted in the oil removing manhole (152) is provided at the upper portion of the side wall of the closed tank (19). The opening (19) connected to the suction pipe (196) of the vacuum pump (20)
5) is provided.

【0036】真空ポンプ(20)の駆動により、フレキ
シブルパイプ(18)を通して密閉タンク(19)内に
吸引される膨張黒鉛の水スラリー(膨張黒鉛は油を吸収
して凝集状態となっている)(50)は、網状体(19
1)の上に落下され、膨張黒鉛と水とに分離される。そ
して、密閉タンク(19)の底部に貯留された水(7
0)は、バッチ方式により水抜き配管(193)から排
出される。
An aqueous slurry of expanded graphite which is sucked into the closed tank (19) through the flexible pipe (18) by driving the vacuum pump (20) (expanded graphite absorbs oil to be in an agglomerated state) ( 50) is a reticulate body (19
1) It is dropped on top and separated into expanded graphite and water. The water (7) stored at the bottom of the closed tank (19)
0) is discharged from the drainage pipe (193) by a batch method.

【0037】また、網状体(191)の上に貯留された
膨張黒鉛(60)は、蓋(192)を開け、ハンドル
(211)の操作によって密閉タンク(19)を横転す
ることにより、容器(22)内に取り出される。
Further, the expanded graphite (60) stored on the mesh body (191) is opened by opening the lid (192) and operating the handle (211) to overturn the closed tank (19). 22) is taken out.

【0038】膨張黒鉛の回収工程は、上記の構成の他、
図4に示す様に、スラリーポンプ(23)を利用するこ
とによって構成することが出来る。すなわち、スラリー
ポンプ(23)の吸引側にフレキシブルパイプ(18)
を連結し、スラリーポンプ(23)の吐出側とタンク
(24)の開口(194)とを吐出配管(231)にて
連結する。
In the expanded graphite recovery process, in addition to the above-mentioned structure,
As shown in FIG. 4, it can be constructed by using a slurry pump (23). That is, the flexible pipe (18) is provided on the suction side of the slurry pump (23).
And the discharge side of the slurry pump (23) and the opening (194) of the tank (24) are connected by a discharge pipe (231).

【0039】そして、スラリーポンプ(23)の駆動に
より、フレキシブルパイプ(18)を通して吸引された
膨張黒鉛の水スラリーをタンク(24)内に取り出す。
タンク(24)の構成は、特に、密閉構造とする必要が
ない点を除き、上記の密閉タンク(19)と同一になさ
れている。回収された膨張黒鉛(60)に吸収された油
は、例えば、膨張黒鉛(60)をプレス処理する方法な
どにより、回収することが出来る。
Then, by driving the slurry pump (23), the water slurry of expanded graphite sucked through the flexible pipe (18) is taken out into the tank (24).
The configuration of the tank (24) is the same as that of the above-mentioned closed tank (19) except that it is not necessary to have a closed structure. The oil absorbed by the recovered expanded graphite (60) can be recovered by, for example, a method of pressing the expanded graphite (60).

【0040】[0040]

【発明の効果】以上説明した本発明によれば、洗浄材の
後処理が極めて容易で工業的に有利な洗浄方法を提供さ
れ、本発明の工業的価値は顕著である。
Industrial Applicability According to the present invention described above, an industrially advantageous cleaning method in which post-treatment of a cleaning material is extremely easy is provided, and the industrial value of the present invention is remarkable.

【図面の簡単な説明】[Brief description of drawings]

【図1】油(C重油)の貯蔵タンクにおいて、油抜き後
に当該タンク内の内面に付着した油を洗浄する方法の一
例を示す部分説明図であり、膨張黒鉛の水スラリー調製
工程を示す。
FIG. 1 is a partial explanatory view showing an example of a method for cleaning oil adhering to the inner surface of an oil (C heavy oil) storage tank after oil is removed, showing a water slurry preparation process of expanded graphite.

【図2】図1と同様の部分説明図であり、洗浄工程を示
す。
FIG. 2 is a partial explanatory diagram similar to FIG. 1, showing a cleaning step.

【図3】図1と同様の部分説明図であり、油を吸収した
膨張黒鉛の回収工程を示す。
FIG. 3 is a partial explanatory view similar to FIG. 1, showing a recovery process of expanded graphite that has absorbed oil.

【図4】油を吸収した膨張黒鉛の回収工程の他の一例を
示す部分説明図である。
FIG. 4 is a partial explanatory view showing another example of a step of recovering expanded graphite that has absorbed oil.

【符号の説明】[Explanation of symbols]

(10):水供給ポンプ (11):混合配管 (12):膨張黒鉛供給容器 (13):コンプレッサ (15):油貯蔵タンク (16):洗浄装置 (17):洗浄パイプ (19):密閉タンク (20):真空ポンプ (23):スラリーポンプ (191 ):網状体 (10): Water supply pump (11): Mixing pipe (12): Expanded graphite supply container (13): Compressor (15): Oil storage tank (16): Cleaning device (17): Cleaning pipe (19): Closed Tank (20): Vacuum pump (23): Slurry pump (191): Net

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 疎水性物質の付着した被洗浄物に膨張黒
鉛から成る洗浄材を吹き付けることを特徴とする疎水性
物質の洗浄方法。
1. A method for cleaning a hydrophobic substance, which comprises spraying a cleaning material made of expanded graphite onto an object to be cleaned to which the hydrophobic substance is adhered.
【請求項2】 親水性液体を保持した膨張黒鉛から成る
洗浄材を用いる請求項1に記載の洗浄方法。
2. The cleaning method according to claim 1, wherein a cleaning material made of expanded graphite holding a hydrophilic liquid is used.
【請求項3】 疎水性物質が油類である請求項1又は2
に記載の洗浄方法。
3. The hydrophobic substance is an oil, according to claim 1 or 2.
The cleaning method described in.
【請求項4】 油貯蔵タンクの洗浄方法であって、水供
給ポンプの吐出側に連結された混合配管内に膨張黒鉛を
供給して膨張黒鉛の水スラリーを調製するスラリー調製
工程、上記の水供給ポンプの吐出圧により、膨張黒鉛の
水スラリーを洗浄パイプに設けられたノズルから油貯蔵
タンクの内壁面に吹き付ける洗浄工程から成る請求項1
に記載の洗浄方法。
4. A method for cleaning an oil storage tank, comprising: a slurry preparation step of supplying expanded graphite into a mixing pipe connected to a discharge side of a water supply pump to prepare an expanded graphite water slurry; 2. A cleaning step of spraying a water slurry of expanded graphite onto the inner wall surface of an oil storage tank from a nozzle provided in a cleaning pipe by the discharge pressure of a supply pump.
The cleaning method described in.
JP20584993A 1993-07-27 1993-07-27 Washing method Withdrawn JPH0739840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20584993A JPH0739840A (en) 1993-07-27 1993-07-27 Washing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20584993A JPH0739840A (en) 1993-07-27 1993-07-27 Washing method

Publications (1)

Publication Number Publication Date
JPH0739840A true JPH0739840A (en) 1995-02-10

Family

ID=16513732

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20584993A Withdrawn JPH0739840A (en) 1993-07-27 1993-07-27 Washing method

Country Status (1)

Country Link
JP (1) JPH0739840A (en)

Similar Documents

Publication Publication Date Title
US7736439B2 (en) Method for cleaning a polysilicon fraction
WO2019003657A1 (en) Method for producing recycled fibers, and recycled fibers
JP7446369B2 (en) Method for regenerating superabsorbent polymer, method for producing superabsorbent recycled polymer, and use of alkali metal ion source
JP2011509236A (en) System and method for purifying carbonaceous material
US3800031A (en) Process for preparing silica hydrogel
TW201500415A (en) Treatment method of water-absorbing resin
JPS62502952A (en) Continuous chemical reduction and removal method of mineral substances contained in carbon structure
CN108597984A (en) A kind of cleaning method and its treatment process of monocrystalline silicon piece
CN105692629B (en) The method that acid-washed quartz sand is quickly cleaned
JPH0739840A (en) Washing method
EP0572552A4 (en)
CN108276851A (en) A kind of preparation method of environmental protection shell powder paint
JP6975151B2 (en) Movable or fixed methods and devices for neutralizing and reusing asbestos waste
JPH0739841A (en) Washing method
CN102873047B (en) Method for cleaning high-purity gallium container
JPH0739828A (en) Detergent
CN102616793B (en) Method for eliminating metal ions in rice hulls by utilizing industrial flue gas
JP4614979B2 (en) Polymer wax peeling waste liquid treatment method
CN109569235B (en) Industrial waste gas extract recovery treatment process
JPH0739838A (en) Detergent
JPH08500465A (en) Treatment method of sodium-sulfur battery
JPH0739839A (en) Detergent
CA2090888A1 (en) Process for recycling asbestos-containing acetylene gas cylinders
WO2019123580A1 (en) Method for manufacturing recycled pulp fibers
CN109967034A (en) Final treatment techniques prepare ultralow ash content solid waste base charcoal

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20001003