JPS5934439B2 - Treatment method for accumulated sludge in oil tank - Google Patents

Description

【発明の詳細な説明】 この発明は油槽の内部に山状に堆積しているスラッジを
洗浄装置から噴射する洗浄液によυ崩壊して流動状にし
ながら排出し、堆積しているスラッジの崩壊状態を常時
観察しながら洗浄装置を効率良く作動させるとともに、
迅速にスラッジ処理するようにしたことを特徴とする油
槽内の堆積スラッジを処理する方法に関するものである
。[Detailed Description of the Invention] This invention disintegrates the sludge accumulated in a mountain shape inside an oil tank by a cleaning liquid sprayed from a cleaning device and discharges it in a fluid state. In addition to operating the cleaning equipment efficiently while constantly observing the
The present invention relates to a method for treating accumulated sludge in an oil tank, characterized in that the sludge is quickly treated.

周知のように、例えば原油を貯蔵する浮屋根式油槽にお
いて、油を長期間貯留しておくと底部にスラッジが堆積
するので槽外に排出してなればならない。従来からのδ
ラツジ排出方法の一例としては浮屋根を支柱で支えると
ともに一部の支柱口やループマンホールから浮屋根下方
に洗浄液が噴射する洗浄装置を吊持し、洗浄液を高圧噴
射してスラッジを崩壊しながら流動状とし、ポンプなど
で槽外に排出している。As is well known, for example, in a floating roof oil tank for storing crude oil, if the oil is stored for a long period of time, sludge will accumulate at the bottom and must be drained out of the tank. Conventional δ
An example of a method for discharging sludge is to support the floating roof with pillars and suspend a cleaning device that sprays cleaning liquid downward from some of the pillar openings and loop manholes, and then sprays the cleaning liquid at high pressure to disintegrate and flow the sludge. It is discharged outside the tank using a pump, etc.

この場合、洗浄装置を吊持する前に、浮屋根の上部より
全支柱口または適宜の複数の支柱口よシ検反して堆積ス
ラッジの高さを測定することで堆積スラッジの起伏状態
を堆測して洗浄装置の設置位置を調整するのである。し
かし洗浄液の噴射時にはスラッジの高さを自動的、継続
的に検反することができないので堆積スラッジの崩壊過
程を確認することができず、洗浄装置の作動停止を経、
験的な感により行う、したがつて時間的にも場所的にも
不必要な洗浄液を噴射することになり、例えばスラッジ
が十分に崩壊したにもかかわらず継続的に噴射すること
がある、そして洗浄液の噴射を止めてから油槽を開放し
、視覚によりスラッジが一部未崩壊の場合に再び洗浄装
置で洗浄液を噴射させるが、時間的損失が極めて大きい
。また洗浄液として原油等の友油を使用する場合は、油
槽内にイナートガスを充填しなければならず、前記した
ように洗浄装置を再作動する場合のイナートガスの再光
填も時間的、経済的に無駄である。本発明は上記に鑑み
提案されたもので、油槽内部の堆積スラッジの崩壊状態
を継続的に観察しながら処理できるので、洗浄装置を最
も有効に作動させることができ、またスラッジの完全崩
壊を容易に判断できるので未崩壊のスラッジが残ること
がない。In this case, before suspending the cleaning equipment, the undulating state of the accumulated sludge can be determined by measuring the height of the accumulated sludge by inspecting it from the top of the floating roof through all or multiple prop openings. Then, adjust the installation position of the cleaning device. However, since it is not possible to automatically and continuously check the height of the sludge when the cleaning liquid is injected, it is not possible to check the collapse process of the accumulated sludge, and the cleaning equipment stops operating.
This is done based on experience, and therefore unnecessary cleaning liquid is sprayed both in terms of time and location.For example, cleaning fluid may be sprayed continuously even though the sludge has been sufficiently disintegrated. After stopping the spraying of the cleaning liquid, the oil tank is opened, and if some of the sludge is visually unbroken, the cleaning device sprays the cleaning liquid again, but the time loss is extremely large. Furthermore, when using a companion oil such as crude oil as a cleaning liquid, it is necessary to fill the oil tank with inert gas, and as mentioned above, refilling the inert gas when restarting the cleaning equipment is time-consuming and economical. It's a waste. The present invention has been proposed in view of the above, and since it is possible to treat the accumulated sludge inside the oil tank while continuously observing the disintegration state, the cleaning device can be operated most effectively, and it is easy to completely disintegrate the sludge. Since the process can be judged accurately, there will be no undisintegrated sludge left behind.

以下に本発明を説明すると、原油その他の油を貯蔵する
上面開放の油槽１には浮屋根２を有し、油の貯留時には
浮屋根２が油表面に浮いて覆つている。The present invention will be described below. An oil tank 1 with an open top for storing crude oil or other oil has a floating roof 2, and when storing oil, the floating roof 2 floats on the oil surface and covers it.

この油槽１は直径数１０ｍ乃至１００ｍ程度であつて浮
屋根２もほぼ同一の直径で、浮屋根２には多数の支柱口
３・・・を適宜の配列で形成され、各支柱口３は浮屋根
２に貫通状に設けた筒材４により構成されている。この
筒材４には、貯油量が減少し油面位置が低下しても浮屋
根が一定の高さよりは下降しないようにするため、一定
長をもつた支柱５が止着されている。油槽１の底面に堆
積するスラツジαを排出する場合には筒材４に止着され
ている支柱５を適宜数抜きとリ、その抜き取ジ穴を利し
て洗浄装置６を吊設する。This oil tank 1 has a diameter of about 10 to 100 m, and the floating roof 2 has almost the same diameter.The floating roof 2 has a large number of support ports 3 formed in an appropriate arrangement, and each support port 3 has a floating roof. It is constituted by a cylindrical member 4 provided penetratingly through the roof 2. A support 5 having a certain length is fixed to this tube member 4 in order to prevent the floating roof from lowering below a certain height even if the amount of oil stored decreases and the oil level falls. When discharging the sludge α deposited on the bottom surface of the oil tank 1, an appropriate number of columns 5 fixed to the cylinder member 4 are removed, and the cleaning device 6 is suspended using the removal holes.

この洗浄装置６を吊設するには、例えば油槽１内の油を
ほとんど抜き取つて浮屋根２を支柱５で支えたら油槽内
部に作業者が入９、支柱口３に上から通した洗浄液の供
給管７下端に洗浄装置６を接続するのである。洗浄装置
６は浮屋根２の全面に分散状に吊設するので、各供給管
７を主供給管８に連結し、主供給管８の途中にポンプ９
を臨ませて基端を洗浄液のタンク１０に接続する。また
油槽１の底部に臨ませた排出管１１をマンホールＶから
外部に延出させて補助タンク１２に接続し、補助タンク
１２とポンプ９の吸入側とを連結管１３で接続し、排出
管１１の途中には油槽１内の液を補助タンク１２に流入
させるポンプ１４を設ける。そして本発明によれば一部
の支柱口３には油槽内に堆積するスラツジαの状態を観
察する検尺具１５を設ける。To suspend this cleaning device 6, for example, after draining most of the oil from the oil tank 1 and supporting the floating roof 2 with the supports 5, a worker enters the oil tank 9 and pours the cleaning liquid passed from above into the support opening 3. A cleaning device 6 is connected to the lower end of the supply pipe 7. Since the cleaning device 6 is hung in a distributed manner over the entire surface of the floating roof 2, each supply pipe 7 is connected to the main supply pipe 8, and a pump 9 is installed in the middle of the main supply pipe 8.
The proximal end is connected to the cleaning liquid tank 10 with the base facing toward the front end. In addition, a discharge pipe 11 facing the bottom of the oil tank 1 is extended from the manhole V to the outside and connected to an auxiliary tank 12, and the auxiliary tank 12 and the suction side of the pump 9 are connected by a connecting pipe 13. A pump 14 is provided midway through which the liquid in the oil tank 1 flows into the auxiliary tank 12. According to the present invention, measuring tools 15 are provided at some of the support ports 3 to observe the state of the sludge α deposited in the oil tank.

この検尺具１５は長い捧状又は紐状の検尺材１６と、該
検尺材１６の下端に取付けた接面具１７とからなり、支
柱口３の筒材４上端に固定する板材１８に設けた縦長な
筒状支持材１９に上記検尺材１６を上下動可能に通し、
接面具１７がスラツジαの表面に接するまで検尺材１６
を下降させる。第２図の実施例によれば、検尺具１５は
金属、合成樹脂などからなる長尺な俸状検尺材１６の下
端に金属、合成樹脂などの耐油性材質からなる中空な球
状接面具１７を設けたもので、検尺材１６の上方表面に
目盛１６′を表示する。This measuring tool 15 consists of a long length-shaped or string-shaped measuring material 16 and a contacting tool 17 attached to the lower end of the measuring material 16. The measuring material 16 is passed through the vertically long cylindrical support material 19 provided so as to be movable up and down.
Measurement material 16 until contacting tool 17 comes into contact with the surface of sludge α
lower. According to the embodiment shown in FIG. 2, the length measuring tool 15 is a hollow spherical contacting tool made of an oil-resistant material such as metal or synthetic resin and attached to the lower end of a long, cylindrical length measuring material 16 made of metal, synthetic resin, or the like. 17, and a scale 16' is displayed on the upper surface of the measuring material 16.

第３図の実施例に示す検尺具１５は検尺材１６が合成樹
脂、金属撚線などからなる屈曲自在な紐状で、支持材１
９の上端に設けたコロ２０に上記検尺材１６を掛けて一
方を支持材１９に通すとともに下端に前記実施例と同様
の球状接面具１７を取付け、他方を支持材１９の外面に
沿わせて下端に接面具１７よリ軽量な重錘２１を取付け
る。In the measuring tool 15 shown in the embodiment shown in FIG.
The measuring material 16 is hung on the roller 20 provided at the upper end of the 9, and one end is passed through the supporting material 19, and a spherical contact tool 17 similar to that of the above embodiment is attached to the lower end, and the other end is placed along the outer surface of the supporting material 19. A weight 21, which is lighter than the contact tool 17, is attached to the lower end.

第４図の実施例に示す検尺具１５は中空なバイブ状検尺
材１６の下端に例えば耐油性ゴムなどからなる伸縮自在
な接面具１７を設け、検尺材１６の他端に開閉バルブ２
２を取付けている。使用に際しては検尺材１６を支持材
１９に上下動可能に通した後、バルブ２２を開いて圧縮
空気などを接面具１７に供給して膨張させるのである。
上記いずれの実施例でも検尺材１６が支持材１９に上下
動できるように通つているので、板材１８を支柱口３の
筒材４に固定して検尺材１６を下降させ、接面具１７を
堆積しているスラツジαの表面に接触させれば、目盛１
６′の位置又は重錘２１の位置によつてスラツジの高さ
を判断することができる。The measuring tool 15 shown in the embodiment shown in FIG. 4 has a retractable contact tool 17 made of oil-resistant rubber, for example, at the lower end of a hollow vibrator-like measuring material 16, and an opening/closing valve at the other end of the measuring material 16. 2
2 is installed. In use, after the measuring material 16 is passed through the supporting material 19 so as to be able to move up and down, the valve 22 is opened to supply compressed air or the like to the contacting tool 17 to inflate it.
In any of the above embodiments, the measuring material 16 passes through the supporting member 19 so as to be able to move up and down, so the plate material 18 is fixed to the cylindrical material 4 of the post opening 3, the measuring material 16 is lowered, and the contacting tool 17 When the sludge α is brought into contact with the surface of the deposited sludge α, the scale becomes 1.
The height of the sludge can be determined by the position of 6' or the position of the weight 21.

上記した検尺具１５は洗浄装置６によつて洗浄処理する
以前に取付けるのであつて、浮屋根２に多数有る支柱口
のうち、複数の支柱口に等分散するように取付けるとス
ラツジの堆積状態を正確に把握することができる。The measuring tool 15 described above is installed before the cleaning process is performed by the cleaning device 6, and if it is installed so as to be evenly distributed among the many pillar openings on the floating roof 2, the sludge will accumulate. can be accurately grasped.

このように検尺具１５を支柱口に取付けて検尺材によリ
スラツジの堆積状態を確認したらポンプ９を駆動してタ
ンク１０内の洗浄液を主供給管８から各供給管７に圧送
して洗浄装置６から高圧噴射させ、洗浄液の噴射圧によ
りスラツジを崩壊させる。After attaching the measuring tool 15 to the post opening and checking the accumulation of squirrel sludge using the measuring material, drive the pump 9 to pump the cleaning liquid in the tank 10 from the main supply pipe 8 to each supply pipe 7. A high-pressure jet is applied from the cleaning device 6, and the sludge is broken down by the jet pressure of the cleaning liquid.

この場合、検尺具によジスラツジの堆積状態を把握でき
るので、洗浄装置をスラツジ表面に接近させて効率良く
崩壊させることができる。スラッジが崩壊すると油槽１
の底部には洗浄液に混つた液体が溜るので、ポンプ１４
を駆動して液体を排出管１１から補助タンク１２に排出
し、補助タンク１２内の液体をポンプ９により供給管８
，７に圧送して洗浄装置６から噴射させる。このように
洗浄装置から洗浄液を連続的に高圧噴射するとスラツジ
が次第に崩壊して堆積高さが低くなり、この状態を各検
尺具１５の検尺材１６が下降することによつて容易に確
認することができる。したがつてスラツジの崩壊状態は
洗浄開始時、洗浄途中のいずれでも極めて簡単に確認す
ることができ、確認手段が検尺材の高さや重錘の位置で
あるから簡単で、誤ることがない。In this case, since the state of accumulation of sludge can be ascertained using the measuring tool, the cleaning device can be brought close to the sludge surface to efficiently break it down. When the sludge collapses, oil tank 1
The liquid mixed with the cleaning liquid collects at the bottom of the pump 14.
is driven to discharge the liquid from the discharge pipe 11 to the auxiliary tank 12, and the liquid in the auxiliary tank 12 is transferred to the supply pipe 8 by the pump 9.
, 7 and sprayed from the cleaning device 6. When the cleaning liquid is continuously sprayed at high pressure from the cleaning device in this way, the sludge gradually collapses and the pile height becomes lower, and this condition can be easily confirmed by lowering the measuring material 16 of each measuring tool 15. can do. Therefore, the state of collapse of the sludge can be extremely easily confirmed either at the start of cleaning or during cleaning, and since the confirmation means are the height of the measuring material and the position of the weight, it is easy and there is no error.

なお各検尺材１６は長さが油槽１の底面から浮屋根２ま
での高さ以上であれば、検尺材１６が最下降して接面具
１７が油槽底面に接しても支持材１９から外れることが
なく、油槽内にスラツジがなくなつたことを確認するこ
とができる。以上で明らかなように、本発明によれば洗
浄開始時に浮屋根の適宜位置に検尺具を設けるだけで油
槽内部に堆積するスラツジの状態を観察することができ
、また洗浄途中であつても検尺具の下降伏態を確認する
だけでスラツジの崩壊過程を判断することができる。Note that as long as the length of each measuring piece 16 is at least the height from the bottom of the oil tank 1 to the floating roof 2, even if the measuring piece 16 is lowered to its lowest point and the contact tool 17 touches the bottom of the oil tank, it will not touch the support member 19. It will not come off and you can confirm that there is no sludge in the oil tank. As is clear from the above, according to the present invention, it is possible to observe the state of the sludge accumulated inside the oil tank by simply installing a measuring tool at an appropriate position on the floating roof at the start of cleaning, and even during cleaning. The collapse process of sludge can be determined simply by checking the downward fall state of the measuring tool.

更に各検尺具の検尺材が最下降すれば油槽内のスラツジ
がすべて崩壊したことを確認することができる。したが
つて洗浄時には洗浄装置の高さを適正に設定して洗浄液
の噴射によリ効率良く、無駄なく洗浄することができ、
またスラツジがすべて崩壊したことを容易に確認できる
ので、スラツジが一部で残つたまま洗浄処理を終了する
ことがない。これによリ洗浄時間を著しく短縮できるば
か９でなく洗浄効率が高まリ、しかも洗浄液を無駄に消
費しなくて経済的効果も高くなり、特に径の長い大規模
な油槽ほど実用的価値が高い。Furthermore, when the measuring material of each measuring tool descends to its lowest position, it can be confirmed that all the sludge in the oil tank has collapsed. Therefore, when cleaning, it is possible to set the height of the cleaning device appropriately and spray the cleaning liquid to clean efficiently and without waste.
Furthermore, since it can be easily confirmed that all the sludge has collapsed, the cleaning process will not end with some sludge remaining. This can significantly shorten the cleaning time, improve cleaning efficiency, and also increase the economical effect by not wasting the cleaning fluid, especially for large-scale oil tanks with a long diameter. expensive.

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

第１図は本発明の方法の一汐１を示す概略図、第２図乃
至第４図は検尺具の各例を示す正面図である。FIG. 1 is a schematic diagram showing the first step of the method of the present invention, and FIGS. 2 to 4 are front views showing each example of the measuring tool.

Claims (1)

【特許請求の範囲】[Claims] １ 洗浄液により洗浄を開始する前に浮屋根に適宜の配
置で検尺具を取付け、検尺具を上下動自在に支えた検尺
材と、該検尺材の下端に取付けられて油槽内部に堆積す
るスラッジの表面に接する接面具とで構成し、洗浄液の
噴射によるスラッジの崩壊状態を検尺材の下降により確
認することができ、洗浄途中でも検尺材の状態でスラッ
ジの崩壊を判断するようにしたことを特徴とする油槽内
の堆積スラッジ処理法。1. Before starting cleaning with cleaning liquid, install the measuring tools on the floating roof in an appropriate arrangement, and install the measuring materials that support the measuring tools so that they can move up and down, and the measuring materials that are attached to the lower end of the measuring materials inside the oil tank. It consists of a contact tool that comes into contact with the surface of the accumulated sludge, and the state of collapse of the sludge due to the injection of cleaning liquid can be confirmed by lowering the measuring material, and the collapse of the sludge can be determined by the state of the measuring material even during cleaning. A method for treating accumulated sludge in an oil tank, characterized by: