JP2001262190A - Method for cleaning plant with heavy oil-based fouling sticking thereto - Google Patents
Method for cleaning plant with heavy oil-based fouling sticking theretoInfo
- Publication number
- JP2001262190A JP2001262190A JP2000081793A JP2000081793A JP2001262190A JP 2001262190 A JP2001262190 A JP 2001262190A JP 2000081793 A JP2000081793 A JP 2000081793A JP 2000081793 A JP2000081793 A JP 2000081793A JP 2001262190 A JP2001262190 A JP 2001262190A
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- JP
- Japan
- Prior art keywords
- oil
- cleaning
- heavy oil
- plant
- contaminants
- 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
- Cleaning In General (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は重質油系汚染物の付
着したプラントの洗浄方法、特に石油精製プラントにお
ける重質油処理装置の熱交換器の洗浄に適した洗浄方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning a plant to which heavy oil-based contaminants are attached, and more particularly to a cleaning method suitable for cleaning a heat exchanger of a heavy oil processing apparatus in a petroleum refining plant.
【０００２】[0002]
【従来の技術】石油精製プラントの重質油系プラント、
特に重質油処理装置の熱交換器では、熱交換チューブ内
を流れるプロセス油が外部からの熱で脱水素反応して高
粘性の汚染物が生成し、この汚染物が熱交換チューブ内
壁に付着して熱交換効率およびプロセス油の流量を低下
させ、汚染が進行すると流路が閉塞する場合も生じる。
石油精製プラントにおける他のプラントならびに石油化
学プラントにおいても、油の脱水素反応が進行してカー
ボン化した粒子や、原料油に潜在的に存在するスケール
成分または機器母材の腐食により生成するスケール成分
が、アスファルテン、タール等の芳香族化合物を含む重
質油をバインダとして結合し、高粘性の汚染物が生成
し、これが器壁に付着して同様の問題を生じる。2. Description of the Related Art Heavy oil-based plants of petroleum refining plants,
In particular, in the heat exchanger of heavy oil processing equipment, process oil flowing in the heat exchange tube undergoes a dehydrogenation reaction with external heat to generate highly viscous contaminants, which adhere to the inner walls of the heat exchange tubes. As a result, the heat exchange efficiency and the flow rate of the process oil are reduced, and as the contamination progresses, the flow path may be blocked.
In other petroleum refinery plants and petrochemical plants, the dehydrogenation of oil proceeds and carbonized particles, and scale components that are potentially present in the feed oil or scale components that are generated by corrosion of equipment base materials. However, heavy oil containing aromatic compounds such as asphaltenes and tars is combined as a binder to generate highly viscous contaminants, which adhere to the vessel wall and cause a similar problem.
【０００３】このような重質油系汚染物を除去するため
の洗浄方法として、従来は軽油を導入して内部に滞留す
るプロセス油を系外に押し出して置換したのち、蒸気パ
ージにより軽油を揮発させ、その後プラントを解体して
高圧水洗浄等の物理的な洗浄により汚染物を除去してい
る。例えば熱交換器の場合、軽油置換および蒸気パージ
後カバー類を外して熱交換チューブのバンドルを引き抜
き、高圧水洗浄により汚れを除去している。カバー類に
付着する汚れも高圧水洗浄と手作業で洗浄を行う。洗浄
後組立作業等の復旧作業を行って運転を再開する。[0003] As a cleaning method for removing such heavy oil-based contaminants, conventionally, light oil is introduced to extrude process oil remaining inside to replace the system oil, and then gas oil is volatilized by steam purging. After that, the plant is dismantled and contaminants are removed by physical cleaning such as high-pressure water cleaning. For example, in the case of a heat exchanger, after replacing light oil and purging with steam, covers are removed, a bundle of heat exchange tubes is pulled out, and dirt is removed by high-pressure water washing. Dirt adhering to covers is also cleaned by high-pressure water cleaning and manually. After cleaning, perform recovery work such as assembly work, and restart operation.
【０００４】ところがこのような従来の重質油系汚染物
の洗浄方法では、複雑な工程と手作業が必要であり、ま
た洗浄時間も長くなり、洗浄コストも高くなるなどの問
題点がある。上記の汚染物は重質油処理装置の熱交換器
の場合、約２週間で付着して熱交換効率および流量を低
下させる場合があるため、頻繁に洗浄を行う必要がある
が、従来の洗浄方法ではこのような場合の洗浄に有効で
はない。[0004] However, such a conventional method for cleaning heavy oil-based contaminants requires complicated steps and manual work, and also has problems such as long cleaning time and high cleaning cost. In the case of the heat exchanger of the heavy oil processing unit, the above contaminants may adhere in about two weeks and reduce the heat exchange efficiency and the flow rate. The method is not effective for cleaning in such cases.
【０００５】[0005]
【発明が解決しようとする課題】本発明の課題は、プラ
ントを解体することなく、簡単な操作により短時間で効
率よく重質油系汚染物を除去することができ、洗浄コス
トを低くできるとともに、洗浄排液も再利用できる重質
油系汚染物が付着したプラントの洗浄方法を得ることで
ある。SUMMARY OF THE INVENTION It is an object of the present invention to remove heavy oil-based contaminants efficiently and in a short time by a simple operation without dismantling a plant, and to reduce cleaning costs. Another object of the present invention is to provide a method for cleaning a plant to which heavy oil-based contaminants adhere, which can reuse cleaning wastewater.
【０００６】[0006]
【課題を解決するための手段】本発明は次の重質油系汚
染物が付着したプラントの洗浄方法である。 （１） 重質油系汚染物が付着したプラントに、軽質油
と高沸点芳香族溶剤の混合溶媒からなる洗浄剤を導入
し、重質油系汚染物を溶解させて除去することを特徴と
する重質油系汚染物が付着したプラントの洗浄方法。 （２） 高沸点芳香族溶剤が炭素数９以上のアルキルベ
ンゼンを主成分とするものである上記（１）記載の方
法。SUMMARY OF THE INVENTION The present invention is a method for cleaning a plant to which the following heavy oil-based contaminants adhere. (1) A cleaning agent comprising a mixed solvent of light oil and a high-boiling aromatic solvent is introduced into a plant to which heavy oil-based contaminants have adhered to dissolve and remove heavy oil-based contaminants. For cleaning plants with heavy oil-based contaminants. (2) The method according to the above (1), wherein the high-boiling aromatic solvent comprises an alkylbenzene having 9 or more carbon atoms as a main component.
【０００７】本発明において除去の対象となる重質油系
汚染物は、重質油を成分としまたは重質油から生成して
プラントに付着する汚染物である。このような汚染物は
重質油がそのままの状態で含まれるもののほか、重質油
が熱、触媒等により高分子化または変性した状態で含ま
れるものがある。ここで重質油とは、重油のように元々
重質であるもののほか、軽質油が高分子化または変性に
より重質化したものも含まれる。[0007] Heavy oil-based contaminants to be removed in the present invention are contaminants that are produced from heavy oil or are produced from heavy oil and adhere to the plant. Such contaminants include those in which heavy oil is contained as it is, and those in which heavy oil is polymerized or modified by heat, a catalyst, or the like. Here, heavy oil includes not only oil that is originally heavy such as heavy oil, but also heavy oil obtained by polymerizing or modifying light oil.
【０００８】本発明において洗浄の対象となる重質油系
汚染物が付着したプラントは、プラント中をプロセス油
が流れる過程において、重質油がそのまま、または他の
成分と結合して形成される汚染物が器壁に付着し、ある
いは軽質油もしくは重質油が高分子化または変性して重
質化したものがそのまま、または他の成分と結合して形
成される汚染物が器壁に付着したプラントである。この
ようなプラントとしては石油精製プラントの重質油系プ
ラント、特に接触分解装置等の重質油処理装置の熱交換
器、中でもボトム熱交換器が代表的なものとしてあげら
れるが、石油精製プラントにおける他のプラントならび
に石油化学プラントでも、同様に重質油系汚染物が付着
するプラントは洗浄の対象となる。[0008] In the present invention, a plant to which heavy oil-based contaminants to be cleaned has adhered is formed by the heavy oil as it is or in combination with other components during the process oil flow in the plant. Contaminants adhere to the vessel wall, or light oil or heavy oil polymerized or modified to make it heavier, or contaminants formed by combining with other components adhere to the vessel wall Plant. A typical example of such a plant is a heavy oil-based plant of a petroleum refining plant, particularly a heat exchanger of a heavy oil processing unit such as a catalytic cracking unit, particularly a bottom heat exchanger. In other plants as well as in petrochemical plants, plants to which heavy oil-based contaminants adhere are also subject to cleaning.
【０００９】このようなプラントは汚染物が付着した機
器を含む全プラントを洗浄の対象としてもよいが、汚染
物の付着が部分的に限定されている場合にはその部分の
みを洗浄してもよい。汚染部分のみを洗浄するためには
解体する必要はなく、汚染部分と非汚染部分を弁等で遮
断し、必要により仮設の配置を汚染部分に接続して、外
部に設けた洗浄剤槽との間に循環路を形成し、洗浄液を
循環して洗浄を行うことができる。In such a plant, the entire plant including the equipment to which the contaminant adheres may be subjected to cleaning. However, if the contaminant adherence is partially limited, only that part may be cleaned. Good. It is not necessary to disassemble to clean only the contaminated part.The contaminated part and the non-contaminated part are shut off with a valve, etc. A circulation path is formed therebetween, and cleaning can be performed by circulating the cleaning liquid.
【００１０】本発明で使用する洗浄剤は軽質油と高沸点
芳香族溶剤の混合溶媒からなる。軽質油は灯油、軽油、
ＬＣＯなど、揮発性の少ない比較的低沸点の鉱油であ
り、沸点１５０〜４００℃、好ましくは１５９〜３６０
℃のものが適している。ＬＣＯ（Ｌｉｇｈｔ Ｃｙｃｌ
ｅ Ｏｉｌ・・・軽質循環油）はＦＣＣ（Ｆｌｕｉｄ Ｃ
ａｔａｌｙｔｉｃ Ｃｒａｃｋｉｎｇ・・・流動接触分
解）の副産物として得られるもので、軽油に似ているが
芳香族油を多く含んでいる。The detergent used in the present invention comprises a mixed solvent of light oil and a high boiling aromatic solvent. Light oil is kerosene, light oil,
It is a relatively low-boiling mineral oil having a low volatility, such as LCO, having a boiling point of 150 to 400 ° C, preferably 159 to 360 °.
° C is suitable. LCO (Light Cycle)
e Oil: Light circulating oil is FCC (Fluid C
It is obtained as a by-product of a catalytic cracking (fluid catalytic cracking), and is similar to light oil but contains a large amount of aromatic oil.
【００１１】高沸点芳香族溶剤は、高沸点の芳香族油を
主成分とする鉱物油であり、沸点としては１５０〜４０
０℃、好ましくは１５９〜３５０℃のものが好ましい。
このような高沸点芳香族溶剤には炭素数９以上、好まし
くは９〜１２のアルキルベンゼンを主成分とするものが
好ましい。この高沸点芳香族溶剤は１種の芳香族化合物
が含まれるものでもよく、アルキル基の炭素数、置換
数、位置等の異なる複数の化合物が含まれるものでもよ
い。The high-boiling aromatic solvent is a mineral oil containing a high-boiling aromatic oil as a main component and having a boiling point of 150 to 40.
A temperature of 0 ° C, preferably 159 to 350 ° C, is preferred.
Such a high-boiling aromatic solvent preferably contains an alkylbenzene having 9 or more carbon atoms, preferably 9 to 12 carbon atoms as a main component. The high-boiling aromatic solvent may contain one kind of aromatic compound, or may contain a plurality of compounds having different carbon numbers, substitution numbers, positions and the like of the alkyl group.
【００１２】このような高沸点芳香族溶剤としては市販
品を使用することができ、Ｃ9以上のアルキルベンゼン
を含むものとして日石三菱石油（株）製スーパーゾール
ＳＳ１５００、スーパーゾールＳＳ１８００、ジャパン
エナジー（株）製カクタスソルベントＰ１００、昭和シ
ェル石油（株）製シェルゾールＡ、シェルゾールＡＢ、
シェルゾールＲ（いずれも商標）などがあげられる。As such a high-boiling aromatic solvent, a commercially available product can be used. As a high-boiling aromatic solvent containing a C 9 or more alkylbenzene, Supersol SS1500, Supersol SS1800, Nippon Mitsubishi Oil Co., Ltd. Cactus Solvent P100 manufactured by Showa Shell Sekiyu KK, Shell Sol A and Shell Sol AB manufactured by Showa Shell Sekiyu KK
Shellsol R (both are trademarks).
【００１３】高沸点芳香族溶剤の使用量は軽質油との混
合溶媒中１０重量％以上、好ましくは１０〜８０重量
％、さらに好ましくは２０〜４０重量％とすることがで
きる。混合溶媒中には上記の２成分の他に他の溶媒を配
合してもよく、また溶解を促進するために各種添加剤を
添加することができる。The amount of the high-boiling aromatic solvent used may be 10% by weight or more, preferably 10 to 80% by weight, more preferably 20 to 40% by weight in the mixed solvent with the light oil. The mixed solvent may contain other solvents in addition to the above two components, and various additives may be added to promote the dissolution.
【００１４】本発明の洗浄方法は被洗浄物である重質油
系汚染物が付着したプラントに上記の洗浄剤を導入して
汚染物と接触させ、汚染物を洗浄剤中に溶解させて除去
する。洗浄に先立ってプロセスオイルを抜き出す必要が
あるが、このためには軽質油を注入して置換するのが好
ましい。軽質油で系内と置換したのち、高沸点芳香族溶
剤を注入して混合溶媒としての洗浄剤を形成するのが好
ましい。この場合外部の洗浄剤槽から軽質油を注入して
循環し、置換後洗浄剤槽に高沸点芳香族溶剤を注入して
混合溶媒とし、循環を継続して洗浄を行うのが好まし
い。According to the cleaning method of the present invention, the above-mentioned cleaning agent is introduced into a plant to which heavy oil-based contaminants to be cleaned are attached and brought into contact with the contaminants, and the contaminants are dissolved in the cleaning agent and removed. I do. Before the cleaning, it is necessary to extract the process oil. For this purpose, light oil is preferably injected and replaced. After replacing the inside of the system with light oil, it is preferable to inject a high-boiling aromatic solvent to form a detergent as a mixed solvent. In this case, it is preferable that light oil is injected from the external detergent tank and circulated, and after replacement, a high-boiling aromatic solvent is injected into the detergent tank to form a mixed solvent and the circulation is continued to perform washing.
【００１５】洗浄時の温度は密閉状態で洗浄を行うとき
は限定されないが、仮設の洗浄剤槽を使用する場合など
解放状態で洗浄を行う場合には、洗浄剤の成分である軽
質油および高沸点芳香族溶剤が揮発しない温度、すなわ
ちこれらの成分の沸点以下の温度で洗浄を行うのが好ま
しい。洗浄時間は汚染物の除去に必要な時間であり、洗
浄剤中の汚染物濃度増加が少なくなった時点を終点とす
ることができる。The temperature at the time of washing is not limited when the washing is carried out in a closed state, but when the washing is carried out in an open state such as when a temporary washing tank is used, the light oil which is a component of the washing agent and The washing is preferably performed at a temperature at which the boiling aromatic solvent does not evaporate, that is, at a temperature not higher than the boiling points of these components. The cleaning time is a time required for removing contaminants, and can be an end point when the increase in the concentration of contaminants in the cleaning agent is reduced.
【００１６】被洗浄物であるプラントに洗浄剤を注入し
て汚染物に接触させることにより、汚染物は洗浄剤中に
溶解して除去される。洗浄剤として軽質油のみを用いる
洗浄効果は不十分であるが、軽質油と高沸点芳香族溶剤
との混合溶媒を用いることにより、高除去率で汚染物を
溶解除去することができる。By injecting the cleaning agent into the plant to be cleaned and bringing the cleaning agent into contact with the contaminant, the contaminant is dissolved and removed in the cleaning agent. Although the cleaning effect of using only light oil as a cleaning agent is insufficient, contaminants can be dissolved and removed at a high removal rate by using a mixed solvent of light oil and a high-boiling aromatic solvent.
【００１７】[0017]
【発明の効果】本発明によれば、重質油系汚染物が付着
したプラントを、軽質油と高沸点芳香族溶剤との混合溶
媒からなる洗浄剤で洗浄することにより、プラントを解
体することなく、簡単な操作により短時間で効率よく重
質油系汚染物を除去することができ、洗浄コストを低く
できるとともに、洗浄排液も再利用できる重質油系汚染
物が付着したプラントの洗浄方法を得ることができる。According to the present invention, a plant to which heavy oil-based contaminants have adhered is dismantled by cleaning the plant with a cleaning agent comprising a mixed solvent of light oil and a high-boiling aromatic solvent. Cleaning of plants with heavy oil-based contaminants, which can remove heavy oil-based contaminants efficiently and quickly in a short time with simple operations, reducing cleaning costs and reusing cleaning wastewater You can get the way.
【００１８】[0018]
【発明の実施の形態】以下、本発明の実施形態を、被洗
浄物として石油精製プラントの重質油処理装置のボトム
熱交換器の洗浄に適用する場合について説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a case where an embodiment of the present invention is applied to the washing of a bottom heat exchanger of a heavy oil processing device of a petroleum refining plant as an object to be washed will be described.
【００１９】まずプラントの運転停止後、被洗浄物をプ
ラントの他の部分から遮断し、内部に滞留するプロセス
油を直ちに系外に排出する。排出手順、排出先は適用す
るプラントにより任意に決定することができる。First, after the operation of the plant is stopped, the object to be cleaned is cut off from other parts of the plant, and the process oil staying inside is immediately discharged out of the system. The discharge procedure and discharge destination can be arbitrarily determined depending on the plant to which the method is applied.
【００２０】次に装置内の温度を使用する洗浄剤の成分
である軽質油および高沸点芳香族溶剤の主要成分の沸点
（例えば高沸点芳香族溶剤としてＣ9のものを用いる場
合１５０〜２００℃）以下に冷却する。冷却は自然冷却
でもよく、また冷却器を使用してもよい。Next, the boiling point of the main components of the light oil and the high-boiling aromatic solvent which are the components of the cleaning agent using the temperature in the apparatus (for example, 150 to 200 ° C. when a high-boiling aromatic solvent of C 9 is used) ) Cool below. The cooling may be natural cooling, or a cooler may be used.
【００２１】次に被洗浄物に軽質油を注入して張り込
み、内部に残留するプロセス油を系外に排出する。軽質
油は洗浄剤槽から仮設の循環路を通して軽質油を注入
し、置換するのが好ましいが、ポンプのサクション側に
注入して循環できるときは洗浄剤槽を省略することがで
きる。Next, light oil is injected into the object to be cleaned and then applied, and the process oil remaining inside is discharged out of the system. It is preferable to inject light oil from the detergent tank through a temporary circulation path and replace the light oil, but if the oil can be injected and circulated on the suction side of the pump, the detergent tank can be omitted.
【００２２】その後、本設ポンプまたは仮設ポンプによ
り軽質油を循環する。このとき被洗浄物のライン構成
上、循環できない場合にはラインの末端部からポンプの
サクション側に仮設配管を行って被洗浄物の全体に循環
流が形成されるようにする。Thereafter, the light oil is circulated by the permanent pump or the temporary pump. At this time, if the line cannot be circulated due to the line configuration of the object to be cleaned, a temporary pipe is provided from the end of the line to the suction side of the pump so that a circulating flow is formed throughout the object to be cleaned.
【００２３】循環開始後は洗浄剤槽、本設ポンプのサク
ショントレーナ、配管等のエア抜き、ドレン等を利用し
て高沸点芳香族溶剤を注入し、軽質油と混合して混合溶
媒を形成し、これを洗浄剤として循環する。高沸点芳香
族溶剤の注入の際は、被洗浄物内で溶剤濃度の偏りが生
じないようにするために、循環流量と保有液量から循環
液の循環に伴って均等に高沸点芳香族溶剤が同量ずつ均
等に注入される注入量を計算して注入する。After the circulation is started, a high boiling aromatic solvent is injected using a cleaning tank, a suction trainer of a main pump, air bleeding of pipes, drains, etc., and mixed with light oil to form a mixed solvent. This is circulated as a cleaning agent. When injecting the high-boiling aromatic solvent, the high-boiling aromatic solvent is evenly distributed from the circulating flow rate and the retained liquid amount with the circulation of the circulating liquid in order to prevent the solvent concentration from becoming uneven in the cleaning target. Is calculated by injecting the same amount by equal amount.
【００２４】例えば被洗浄物（循環系を含む）全体の保
有液量を１００ｍ3、循環流量を２００ｍ3／ｈｒ、注入
する高沸点芳香族溶剤を４０ｍ3とすると、１サイクル
が３０分となるから高沸点芳香族溶剤の注入量は、１サ
イクルで全量注入する場合は８０ｍ3／ｈｒ、２サイク
ルで全量注入する場合は４０ｍ3／ｈｒ、３サイクルで
全量注入する場合は２７ｍ3／ｈｒ、４サイクルで全量
注入する場合は２０ｍ3／ｈｒとなる。高沸点芳香族溶
剤注入前は被洗浄物は軽質油で充満しているので、高沸
点芳香族溶剤を注入する際はその注入量に相当する量の
軽質油をあらかじめ抜いておくのが好ましいが、注入と
同時にラインの末端部から軽質油を抜くこともできる。For example, if the total amount of liquid to be washed (including the circulation system) is 100 m 3 , the circulation flow rate is 200 m 3 / hr, and the high boiling aromatic solvent to be injected is 40 m 3 , one cycle takes 30 minutes. The injection amount of the high-boiling aromatic solvent is 80 m 3 / hr when the entire amount is injected in one cycle, 40 m 3 / hr when the entire amount is injected in two cycles, and 27 m 3 / hr when the entire amount is injected in three cycles. When the total amount is injected in four cycles, it is 20 m 3 / hr. Before injecting the high-boiling aromatic solvent, the object to be washed is filled with light oil, so when injecting the high-boiling aromatic solvent, it is preferable to remove in advance the amount of light oil corresponding to the injection amount. Light oil can be drained from the end of the line at the same time as the injection.
【００２５】高沸点芳香族溶剤の注入後、洗浄液を循環
し汚染物を洗浄液中に溶解させて除去する。循環は汚染
物が除去されるに必要な時間であるが、一般的に８時間
以上、好ましくは８〜１２時間とすることができる。洗
浄液に溶解した汚染物濃度を測定し、濃度の増加が少な
くなった時点で循環を停止する。After the injection of the high-boiling aromatic solvent, the cleaning liquid is circulated to dissolve and remove contaminants in the cleaning liquid. Circulation is the time required for contaminants to be removed, but can generally be 8 hours or more, preferably 8-12 hours. The concentration of the contaminants dissolved in the washing solution is measured, and the circulation is stopped when the increase in the concentration is reduced.
【００２６】循環停止後被洗浄物から洗浄液を排出し、
必要により軽質油等で残留する洗浄液を押出した後プロ
セス油を導入して運転を再開することができる。排出さ
れた洗浄排液は必要により固形物等を分離したのち、そ
のまま燃料その他の用途に使用することができ、排液処
理は簡単である。After the circulation is stopped, the cleaning liquid is discharged from the object to be cleaned,
If necessary, after the remaining cleaning liquid is extruded with light oil or the like, the operation can be resumed by introducing process oil. The discharged washing waste liquid can be used for fuel and other purposes as it is after separating solids and the like as necessary, and the drainage treatment is simple.
【００２７】[0027]
【実施例】以下、本発明の実施例について説明する。各
例中、％および比は重量基準である。Embodiments of the present invention will be described below. In each case, the percentages and ratios are based on weight.
【００２８】実施例１、２、比較例１ ４号珪砂に石油精製プラントの重質油処理装置のボトム
油を、珪砂：油＝１：３の割合で混合して模擬汚染物を
調製した。一方、実施例１として軽油８０％と芳香族溶
剤Ａ（Ｃ9の芳香族油を主成分とする１５９〜１７１℃
留分）２０％の混合溶媒からなる洗浄剤１、実施例２と
して軽油８０％と芳香族溶剤Ｂ（Ｃ10芳香族油を主成分
とする１８３〜２０２℃留分）２０％の混合溶媒からな
る洗浄剤２、比較例１として軽油１００％からなる洗浄
剤３をそれぞれ５００ｍｌ準備し、これらに前記模擬ス
ラッジ１２０ｇを１００℃で３時間浸漬し、油分除去率
を測定した。結果を表１に示す。Examples 1 and 2 and Comparative Example 14 No. 4 silica sand was mixed with a bottom oil of a heavy oil treatment unit of an oil refinery plant at a ratio of silica sand: oil = 1: 3 to prepare a simulated pollutant. On the other hand, in Example 1, 80% of light oil and an aromatic solvent A (159 to 171 ° C. containing an aromatic oil of C 9 as a main component) were used.
From fractions) detergent 1 consisting of 20% of the mixed solvent, 183 to 202 ° C. fraction composed mainly of 80% light oil and aromatic solvents B (C 10 aromatic oil as in Example 2) 20% of a mixed solvent 500 ml of a cleaning agent 2 made of 100% light oil and 500 ml of a cleaning agent 3 prepared as Comparative Example 1 were immersed in 120 g of the simulated sludge at 100 ° C. for 3 hours, and the oil removal rate was measured. Table 1 shows the results.
【００２９】[0029]
【表１】表１ [Table 1] Table 1
【００３０】表１の結果より、軽油と高沸点芳香族溶剤
の混合溶媒からなる洗浄剤を用いる実施例１および２
は、軽油単独を用いる比較例１よりも油分除去率がはる
かに高く、重質油系汚染物を効率よく除去できることが
わかる。From the results shown in Table 1, it can be seen that Examples 1 and 2 in which a detergent comprising a mixed solvent of light oil and a high-boiling aromatic solvent are used.
Shows that the oil removal rate is much higher than that of Comparative Example 1 using light oil alone, indicating that heavy oil-based contaminants can be efficiently removed.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ１１Ｄ 17/08 Ｆ２８Ｇ 9/00 Ｎ Ｆ２８Ｇ 9/00 Ｂ０８Ｂ 9/06 Ｆターム(参考） 3B116 AA13 AB53 BB62 BB82 CC05 CD22 3B201 AA13 AB53 BB62 BB82 BB92 BB95 CC21 CD22 4H003 BA12 DA12 DB01 DC03 ED04 FA32 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI theme coat ゛ (reference) C11D 17/08 F28G 9/00 NF F28G 9/00 B08B 9/06 F term (reference) 3B116 AA13 AB53 BB62 BB82 CC05 CD22 3B201 AA13 AB53 BB62 BB82 BB92 BB95 CC21 CD22 4H003 BA12 DA12 DB01 DC03 ED04 FA32
Claims (2)
軽質油と高沸点芳香族溶剤の混合溶媒からなる洗浄剤を
導入し、重質油系汚染物を溶解させて除去することを特
徴とする重質油系汚染物が付着したプラントの洗浄方
法。1. A plant to which heavy oil-based contaminants adhere,
A method for cleaning a plant to which heavy oil-based contaminants adhere, wherein a cleaning agent comprising a mixed solvent of light oil and a high-boiling aromatic solvent is introduced to dissolve and remove heavy oil-based contaminants.
キルベンゼンを主成分とするものである請求項１記載の
方法。2. The method according to claim 1, wherein the high-boiling aromatic solvent contains an alkylbenzene having 9 or more carbon atoms as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000081793A JP2001262190A (en) | 2000-03-17 | 2000-03-17 | Method for cleaning plant with heavy oil-based fouling sticking thereto |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000081793A JP2001262190A (en) | 2000-03-17 | 2000-03-17 | Method for cleaning plant with heavy oil-based fouling sticking thereto |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001262190A true JP2001262190A (en) | 2001-09-26 |
Family
ID=18598683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000081793A Pending JP2001262190A (en) | 2000-03-17 | 2000-03-17 | Method for cleaning plant with heavy oil-based fouling sticking thereto |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001262190A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002097494A (en) * | 2000-09-22 | 2002-04-02 | Japan Energy Corp | Detergent for chemical plant and its cleaning method |
| WO2007018058A1 (en) * | 2005-08-09 | 2007-02-15 | Asahi Glass Company, Limited | Method for removal of acidic adherent matter |
| JP2015137292A (en) * | 2014-01-21 | 2015-07-30 | 株式会社片山化学工業研究所 | Method for preventing adhesion and deposition of stain on coke oven gas flow passage |
| CN111545530A (en) * | 2020-05-14 | 2020-08-18 | 北京乐文科技发展有限公司 | Oil refining device shutdown oil removal cleaning method |
-
2000
- 2000-03-17 JP JP2000081793A patent/JP2001262190A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002097494A (en) * | 2000-09-22 | 2002-04-02 | Japan Energy Corp | Detergent for chemical plant and its cleaning method |
| WO2007018058A1 (en) * | 2005-08-09 | 2007-02-15 | Asahi Glass Company, Limited | Method for removal of acidic adherent matter |
| US8202370B2 (en) | 2005-08-09 | 2012-06-19 | Asahi Glass Company, Limited | Method for removing acidic deposit |
| JP5012508B2 (en) * | 2005-08-09 | 2012-08-29 | 旭硝子株式会社 | How to remove acidic deposits |
| JP2015137292A (en) * | 2014-01-21 | 2015-07-30 | 株式会社片山化学工業研究所 | Method for preventing adhesion and deposition of stain on coke oven gas flow passage |
| CN111545530A (en) * | 2020-05-14 | 2020-08-18 | 北京乐文科技发展有限公司 | Oil refining device shutdown oil removal cleaning method |
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