JP3385493B2 - Cleaning method of floating roof tank - Google Patents
Cleaning method of floating roof tankInfo
- Publication number
- JP3385493B2 JP3385493B2 JP19991094A JP19991094A JP3385493B2 JP 3385493 B2 JP3385493 B2 JP 3385493B2 JP 19991094 A JP19991094 A JP 19991094A JP 19991094 A JP19991094 A JP 19991094A JP 3385493 B2 JP3385493 B2 JP 3385493B2
- Authority
- JP
- Japan
- Prior art keywords
- floating roof
- side plate
- tank
- inner peripheral
- peripheral surface
- 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 - Fee Related
Links
Landscapes
- Cleaning In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、揮発性を有した可燃性
の液体を貯溜する石油タンク等の浮屋根式タンクの点検
前に、タンク内を洗浄する際の方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning the inside of a floating roof tank such as an oil tank for storing a flammable liquid having a volatile property before inspecting the tank.
【０００２】[0002]
【従来の技術とその課題】従来、火力発電等で使用する
石油（燃料油）を貯蔵しているタンクは、消防法によ
り、５年間に１回点検することが義務付けられており、
点検前には、貯蔵油を他のタンクに移し、点検するタン
ク内を空にしなければならない。2. Description of the Related Art Conventionally, tanks that store petroleum (fuel oil) used in thermal power generation, etc. are obliged to be inspected once every five years by the Fire Service Act.
Before checking, the stored oil must be transferred to another tank and the tank to be checked must be emptied.
【０００３】そして、点検時にスラッヂ等が残っている
と、危険であり、また、正確な点検ができないことか
ら、タンク内を洗浄する必要がある。If sludge or the like remains during inspection, it is dangerous and accurate inspection cannot be performed. Therefore, it is necessary to clean the inside of the tank.
【０００４】この洗浄は、熱した友油・高温水・灯油等
を使用して行なうが、洗浄中には、大量の可燃性ガスが
発生し、この可燃性ガスに大気中の酸素が混ざれば、タ
ンク内が爆発雰囲気となり、僅かな火花が生じても大災
害となってしまうことから、洗浄中は、常時、不活性ガ
スとしての窒素ガスを注入していた。This cleaning is performed using heated friend oil, high-temperature water, kerosene, etc. During cleaning, a large amount of combustible gas is generated, and if oxygen in the atmosphere is mixed with this combustible gas. Since the inside of the tank is in an explosive atmosphere and even a slight spark is a great disaster, nitrogen gas as an inert gas is constantly injected during cleaning.
【０００５】しかし、浮屋根式タンクでは、その構造
上、筒状の側板と、その内周面に配置される浮屋根と、
の間には、シール部材が配設されているものの、貯蔵油
を抜いた後には、浮力が発生しない関係上、気密性が低
下して、窒素ガスが漏洩することとなり、漏れた分の窒
素ガスを補うように、タンク内にさらに窒素ガスを注入
する必要が生ずることから、窒素ガスの消費量が著しく
多くなっていた。However, in the floating roof type tank, due to its structure, the cylindrical side plate and the floating roof arranged on the inner peripheral surface thereof,
Although a seal member is provided between the two, after the stored oil is drained, the airtightness is reduced due to the fact that buoyancy does not occur, and the nitrogen gas leaks. Since it is necessary to inject the nitrogen gas into the tank so as to supplement the gas, the consumption amount of the nitrogen gas is significantly increased.
【０００６】また、この窒素ガスの漏洩量は、タンク毎
に、側板と浮屋根との隙間のバラツキにより、一定で無
く、洗浄作業を行なう際の窒素ガスの準備管理に支障と
なってしまう。Further, the amount of leakage of this nitrogen gas is not constant due to the variation in the gap between the side plate and the floating roof for each tank, which hinders the preparation and management of the nitrogen gas when performing the cleaning work.
【０００７】さらに、窒素ガスのタンク内への注入によ
り、可燃性ガスもタンク外に漏洩することから、タンク
外での作業環境を悪化させていた。Further, when the nitrogen gas is injected into the tank, flammable gas also leaks to the outside of the tank, which deteriorates the working environment outside the tank.
【０００８】ちなみに、上記課題を解決するために、側
板と浮屋根との隙間を塞ぐように、可撓性シートを浮屋
根上面の外周縁と側板の内周面とに貼り付けることが考
えられるが、側板内周面には、貯蔵油のスラッヂが付着
しており、強固に可撓性シートを貼り付けることができ
ず、可燃性シートが剥れて、窒素ガスの漏洩を招いてし
まう。さらに、可撓性シートを側板内周面に強固に貼り
付けることができたとしても、この種のタンクが海岸付
近に設置され、タンクが強風下にさらされる場合が多
く、風や雨水によって、可撓性シートが側板内周面から
剥れてしまう場合もある。Incidentally, in order to solve the above problems, it is considered that a flexible sheet is attached to the outer peripheral edge of the upper surface of the floating roof and the inner peripheral surface of the side plate so as to close the gap between the side plate and the floating roof. However, the sludge of the stored oil adheres to the inner peripheral surface of the side plate, so that the flexible sheet cannot be firmly adhered to the flammable sheet and the nitrogen gas leaks. Furthermore, even if the flexible sheet can be firmly attached to the inner peripheral surface of the side plate, this type of tank is installed near the shore, and the tank is often exposed to strong wind, so wind and rainwater The flexible sheet may peel off from the inner peripheral surface of the side plate.
【０００９】本発明は、上述の課題を解決するものであ
り、洗浄時の不活性ガスの使用量を低減できて、不活性
ガスの準備管理を手間取らせず、また、洗浄時のタンク
外への可燃性ガスの漏洩を防止できる浮屋根式タンクの
洗浄方法を提供することを目的とする。The present invention is intended to solve the above-mentioned problems. The amount of inert gas used during cleaning can be reduced, the preparation and management of the inert gas can be saved, and the outside of the tank can be cleaned during cleaning. An object of the present invention is to provide a method for cleaning a floating roof tank that can prevent the leakage of flammable gas to the tank.
【００１０】[0010]
【課題を解決するための手段】本発明に係る洗浄方法
は、底板、該底板の外周縁から上方へ延びる筒状の側
板、及び、該側板の内周側に配置される浮屋根、により
囲まれた部位を貯蔵部位として、洗浄時に、内部に不活
性ガスを注入して内周面を洗浄する浮屋根式タンクの洗
浄方法であって、前記浮屋根上面側における前記浮屋根
外周縁と前記側板内周面との隙間を可撓性シートで覆
い、該可撓性シートの両縁を、それぞれ、前記浮屋根上
面側と前記側板内周面側とに粘着テープで止め、前記側
板内周面側の前記粘着テープの前記側板内周面側との貼
着部位を、前記側板に対して吸着可能な磁石を配置させ
て押え、その後、内部に不活性ガスを注入して内周面を
洗浄することを特徴とする。A cleaning method according to the present invention is surrounded by a bottom plate, a cylindrical side plate extending upward from an outer peripheral edge of the bottom plate, and a floating roof arranged on an inner peripheral side of the side plate. A method for cleaning a floating roof type tank in which an inner surface is cleaned by injecting an inert gas into the interior of the floating roof as a storage area, the outer peripheral edge of the floating roof on the upper surface side of the floating roof and the The gap between the inner peripheral surface of the side plate is covered with a flexible sheet, and both edges of the flexible sheet are fixed to the upper surface side of the floating roof and the inner peripheral surface side of the side plate with adhesive tapes, respectively, and the inner peripheral surface of the side plate is covered. The adhesive portion of the surface side of the adhesive tape with the inner peripheral surface side of the side plate is placed by pressing a magnet capable of adsorbing to the side plate, and then the inner peripheral surface is injected by injecting an inert gas. It is characterized by washing.
【００１１】そしてさらに、前記浮屋根上面側の前記粘
着テープの前記浮屋根上面側との貼着部位を、前記浮屋
根に対して吸着可能な磁石を配置させて押えるようにし
ても良い。Further, the sticking site of the adhesive tape on the upper surface side of the floating roof with the upper surface side of the floating roof may be arranged by pressing a magnet which can be attracted to the floating roof.
【００１２】[0012]
【発明の作用・効果】本発明に係る洗浄方法では、ま
ず、浮屋根上面側における浮屋根外周縁と側板内周面と
の隙間を可撓性シートで覆い、ついで、可撓性シートの
両縁を、それぞれ、浮屋根上面側と側板内周面側とに粘
着テープで止めて、さらに、側板内周面側の粘着テープ
の側板内周面側との貼着部位を、側板に対して吸着可能
な磁石を配置させて押え、その後に、内部に不活性ガス
を注入して内周面を洗浄するものである。In the cleaning method according to the present invention, first, the gap between the outer peripheral edge of the floating roof and the inner peripheral surface of the side plate on the upper surface side of the floating roof is covered with a flexible sheet, and then both flexible sheets are covered. The edges are respectively fastened to the upper surface of the floating roof and the inner peripheral surface of the side plate with adhesive tape, and the portion of the inner peripheral surface of the side plate that is attached to the inner peripheral surface of the side plate is attached to the side plate. An attractable magnet is arranged and pressed, and then an inert gas is injected into the interior to clean the inner peripheral surface.
【００１３】すなわち、浮屋根外周縁と側板との隙間
が、可撓性シートで塞がり、タンク内に不活性ガスを注
入しても、可撓性シートによって、不活性ガスの漏洩が
防止される。That is, even if the gap between the outer peripheral edge of the floating roof and the side plate is closed by the flexible sheet and the inert gas is injected into the tank, the flexible sheet prevents the leakage of the inert gas. .
【００１４】そして、可撓性シートの両縁が、それぞ
れ、浮屋根上面側と側板内周面側とに粘着テープで止め
られ、さらに、側板内周面側の粘着テープの側板内周面
側との貼着部位が、側板に対して吸着可能な磁石を配置
させて押えられている。Both edges of the flexible sheet are fixed to the upper surface side of the floating roof and the inner peripheral surface side of the side plate with adhesive tapes, and the inner peripheral surface side of the side tape inner peripheral surface of the adhesive tape. The sticking portion of and is pressed against the side plate by disposing a magnet that can be attracted.
【００１５】すなわち、可撓性シートの側板側の縁は、
粘着テープを介して、磁石により側板内周面に接続され
ることから、側板内周面にスラッヂが付着していても、
さらに、側板が風や雨を受けても、可撓性シートの剥れ
が防止され、不活性ガスの漏洩を防止することができ
る。That is, the edge of the flexible sheet on the side plate side is
Since it is connected to the inner peripheral surface of the side plate by a magnet through the adhesive tape, even if sludge is attached to the inner peripheral surface of the side plate,
Further, even if the side plate receives wind or rain, the flexible sheet is prevented from peeling off, and the leakage of the inert gas can be prevented.
【００１６】したがって、本発明に係る洗浄方法では、
洗浄時の不活性ガスの使用量を低減できて、不活性ガス
の準備管理を手間取らせず、また、洗浄時のタンク外へ
の可燃性ガスの漏洩を防止することができ、洗浄時のタ
ンク外での作業環境を向上させることができる。Therefore, in the cleaning method according to the present invention,
The amount of inert gas used during cleaning can be reduced, the preparation and management of inert gas can be saved, and the flammable gas can be prevented from leaking out of the tank during cleaning. The work environment outside the tank can be improved.
【００１７】また、洗浄後においても、可撓性シートを
粘着テープや磁石を利用して貼着しておけば、浮屋根外
周縁と側板との隙間を可撓性シートで塞いでおくことが
できることから、洗浄中のみならず、点検中にも、タン
ク内への雨水の侵入を防ぐことができ、タンク内部での
作業も円滑に行なうことができる。Further, even after the cleaning, if the flexible sheet is adhered by using an adhesive tape or a magnet, the gap between the outer peripheral edge of the floating roof and the side plate can be closed with the flexible sheet. As a result, rainwater can be prevented from entering the tank not only during cleaning but also during inspection, and work inside the tank can be performed smoothly.
【００１８】なお、可撓性シートの浮屋根側では、浮屋
根上面の外周縁に貯蔵油のスラッヂが付着していないた
め、粘着テープを利用するだけで、可撓性シートの剥れ
を防止できるものの、側板内周面側と同様に、浮屋根上
面側の粘着テープの浮屋根上面側との貼着部位を、浮屋
根に対して吸着可能な磁石を配置させて押えるように構
成すれば、可撓性シートによる浮屋根外周縁と側板との
隙間の閉塞を、一層確実にすることができる。On the floating roof side of the flexible sheet, since the sludge of the storage oil does not adhere to the outer peripheral edge of the upper surface of the floating roof, the peeling of the flexible sheet can be prevented only by using an adhesive tape. However, like the inner peripheral surface of the side plate, if the adhesive tape on the upper surface of the floating roof is attached to the upper surface of the floating roof, a magnet that can be attracted to the floating roof can be arranged and pressed. It is possible to more reliably close the gap between the outer peripheral edge of the floating roof and the side plate by the flexible sheet.
【００１９】[0019]
【実施例】以下、本発明の一実施例を図面に基づいて説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
【００２０】実施例の洗浄方法を実施するタンク１は、
図１に示すように、底板２、底板２の外周縁から上方へ
延びる円筒状の側板３、及び、側板３の内周側に配置さ
れる浮屋根４を備えて構成されている。これらの底板
２、側板３、及び、浮屋根４は、鋼板製として、底板
２、側壁３、及び、浮屋根４で囲まれた部位を燃料油Ｏ
の貯溜部位としている。The tank 1 for carrying out the cleaning method of the embodiment is
As shown in FIG. 1, the bottom plate 2, a cylindrical side plate 3 extending upward from the outer peripheral edge of the bottom plate 2, and a floating roof 4 arranged on the inner peripheral side of the side plate 3 are configured. The bottom plate 2, the side plates 3, and the floating roof 4 are made of steel plates, and the portion surrounded by the bottom plate 2, the side wall 3, and the floating roof 4 is fuel oil O.
It is used as a storage site.
【００２１】側板３には、所定位置に、貯蔵油を排出で
きる図示しない排出口や階段等が配設されている。The side plate 3 is provided with a discharge port, stairs, etc. (not shown) for discharging the stored oil at a predetermined position.
【００２２】浮屋根４は、二重式として、支柱５やマン
ホール６、さらには、窒素ガス注入口８が所定位置に配
設されている。The floating roof 4 is of a double type in which the columns 5, the manhole 6, and the nitrogen gas inlet 8 are arranged at predetermined positions.
【００２３】浮屋根４の外周縁には、側壁３の内周面と
の間のシール性を確保するために、ウレタンフォーム７
ｂをウレタンカバー７ａでくるんでなるシール部材７が
固着されている。On the outer peripheral edge of the floating roof 4, a urethane foam 7 is provided in order to secure a sealing property with the inner peripheral surface of the side wall 3.
A seal member 7 formed by wrapping b with a urethane cover 7a is fixed.
【００２４】なお、９は、浮屋根４の上面の外周縁に多
数軸着されて、先端を側板３の内周面に当接させたウェ
ザーフードである。ちなみに、これらのウェザーフード
９は、雨水のタンク１内部への侵入をある程度防げる
が、完全なものでなく、また、気密性を確保できるもの
でもない。Reference numeral 9 denotes a weather hood which is axially attached to the outer peripheral edge of the upper surface of the floating roof 4 and has its tip abutted against the inner peripheral surface of the side plate 3. Incidentally, although these weather hoods 9 can prevent rainwater from entering the inside of the tank 1 to some extent, they are neither perfect nor airtight.
【００２５】このタンク１の洗浄作業について説明する
と、まず、燃料油Ｏが消費されて、浮屋根４がその支柱
５の下端を底板２に接触する直前まで下降すると、洗浄
作業の開始が可能となる。Explaining the cleaning work of the tank 1, first, when the fuel oil O is consumed and the floating roof 4 descends just before the lower end of the column 5 contacts the bottom plate 2, the cleaning work can be started. Become.
【００２６】そして、洗浄作業が開始される際には、ま
ず、図２に示すように、難燃性を有したビニールシート
等の可撓性シート１０を、両縁が浮屋根４の上面側にお
ける浮屋根４の外周縁と側板３の内周面とにまたぐよう
に、配置させる。When the cleaning work is started, first, as shown in FIG. 2, a flexible sheet 10 such as a flame-retardant vinyl sheet is attached to the upper surface side of the floating roof 4 at both edges. Are arranged so as to straddle the outer peripheral edge of the floating roof 4 and the inner peripheral surface of the side plate 3.
【００２７】ついで、粘着テープ１１・１２を使用し
て、図３に示すように、可撓性シート１０の両縁１０ａ
・１０ｂを、それぞれ、浮屋根４の上面側と側板３の内
周面側とに止める。なお、可撓性シート１０の幅寸法
は、浮屋根４の支柱５の下端が底板２に当接するよう
に、浮屋根４が下がっても、余裕を持って、可撓性シー
ト１０を浮屋根４の上面側と側板３の内周面側とに粘着
テープ１１・１２によって止めておくことができる寸法
とする。Next, using the adhesive tapes 11 and 12, as shown in FIG.
-Stop 10b on the upper surface side of the floating roof 4 and on the inner peripheral surface side of the side plate 3, respectively. The width dimension of the flexible sheet 10 is such that the lower end of the pillar 5 of the floating roof 4 abuts on the bottom plate 2 even if the floating roof 4 is lowered. The size is such that it can be fixed to the upper surface side of 4 and the inner peripheral surface side of the side plate 3 by the adhesive tapes 11 and 12.
【００２８】さらに、図４に示すように、側板３の内周
面側の粘着テープ１１における側板３の内周面側との貼
着部位に、永久磁石１３を配置させて、磁石１３の側板
３への吸着作用により、その貼着部位を押える。同様
に、浮屋根４の上面側の粘着テープ１２における浮屋根
４の上面側との貼着部位に、永久磁石１４を配置させ
て、磁石１４の浮屋根４への吸着作用により、その貼着
部位を押える。Further, as shown in FIG. 4, a permanent magnet 13 is arranged at a portion of the inner peripheral surface side of the side plate 3 where the adhesive tape 11 is attached to the inner peripheral surface side of the side plate 3, and the side plate of the magnet 13 is arranged. By the action of adsorbing to 3, the attachment site is pressed down. Similarly, the permanent magnet 14 is arranged at a portion where the adhesive tape 12 on the upper surface side of the floating roof 4 is attached to the upper surface side of the floating roof 4, and the permanent attachment of the magnet 14 to the floating roof 4 causes the attachment. Hold down the part.
【００２９】なお、磁石１３・１４は、ブロック状のも
のを使用したり、ベルト状のものを使用して、１〜２ｍ
間隔で配置させる。The magnets 13 and 14 may be block-shaped or belt-shaped and may have a length of 1 to 2 m.
Place at intervals.
【００３０】その後、タンク１内に注入口８を経て窒素
ガスを注入しつつ、タンク１内の燃料油Ｏを全て側板３
の図示しない排出口から排出する。Thereafter, while the nitrogen gas is being injected into the tank 1 through the injection port 8, the fuel oil O in the tank 1 is completely removed from the side plate 3.
It is discharged from the discharge port (not shown).
【００３１】すると、図５に示すように、浮屋根４は、
支柱５の下端を底板２に当接させるため、下降が停止さ
れ、その状態で、燃料油Ｏが排出されることとなる。Then, as shown in FIG. 5, the floating roof 4 is
Since the lower end of the column 5 is brought into contact with the bottom plate 2, the descent is stopped and the fuel oil O is discharged in this state.
【００３２】その際、シール部材７は、浮力を失うた
め、先端側を下方に撓ませ、浮屋根４の外周縁と側板３
との間に隙間Ｈが生ずるが、その隙間Ｈは、可撓性シー
ト１０で塞がり、タンク１内に窒素ガスを注入しても、
可撓性シート１０によって、窒素ガスの漏洩が防止され
る。At that time, since the seal member 7 loses buoyancy, the tip side is bent downward, and the outer peripheral edge of the floating roof 4 and the side plate 3 are bent.
Although a gap H is formed between the gap H and the gap H, even if the gap H is closed by the flexible sheet 10 and nitrogen gas is injected into the tank 1,
The flexible sheet 10 prevents leakage of nitrogen gas.
【００３３】そして、その窒素ガスをタンク１内に封入
した状態で、タンク１内に熱した友油や高温水を注入し
てタンク１内を洗浄し、さらに、作業者がマンホール６
からタンク１内に入り、灯油等を使用してスラッヂを洗
い流すように洗浄して洗浄作業を終了させる。Then, in a state where the nitrogen gas is sealed in the tank 1, hot oil or high temperature water is injected into the tank 1 to wash the inside of the tank 1, and the worker is allowed to make a manhole 6
Then, the sludge is washed into the tank 1 by using kerosene or the like to finish the washing work.
【００３４】その後、タンク１内の点検作業を行ない、
タンク１内の塗装を剥して補修箇所を補修し、再度、塗
装し直し、点検作業を終了させる。After that, the inspection work inside the tank 1 is performed,
The paint in the tank 1 is removed to repair the repaired part, the paint is repainted, and the inspection work is completed.
【００３５】なお、燃料油Ｏを排出し始めて、洗浄作業
を終了させるまでは、５万〜６万ＫＬの貯溜ができるタ
ンクで、１週間程度かかり、点検作業が終了するまで
は、３００日程度かかることとなる。It should be noted that it takes about 1 week for a tank capable of storing 50,000 to 60,000 KL until the cleaning work is completed after the fuel oil O is discharged, and the inspection work is completed in about 300 days. This will be the case.
【００３６】その後、点検作業が終了すれば、磁石１３
・１４や粘着テープ１１・１２を剥して、可撓性シート
１０を外し、タンク１に燃料油Ｏを注入すれば良い。After that, when the inspection work is completed, the magnet 13
14 and the adhesive tapes 11 and 12 may be peeled off, the flexible sheet 10 may be removed, and the fuel oil O may be injected into the tank 1.
【００３７】したがって、実施例の洗浄方法では、可撓
性シート１０の側板３側の縁１０ｂが、粘着テープ１２
を介して、磁石１４により側板３内周面に接続されるこ
とから、側板３の内周面にスラッヂが付着していても、
さらに、側板３が風や雨を受けても、可撓性シート１０
の剥れが防止され、窒素ガスの漏洩を防止することがで
き、洗浄時の窒素ガスの使用量を低減できて、窒素ガス
の準備管理を手間取らせず、また、洗浄時のタンク１外
への可燃性ガスの漏洩を防止することができ、洗浄時の
タンク１外での作業環境を向上させることができる。Therefore, in the cleaning method of the embodiment, the edge 10b of the flexible sheet 10 on the side plate 3 side is the adhesive tape 12.
Since it is connected to the inner peripheral surface of the side plate 3 via the magnet 14 even if sludge is attached to the inner peripheral surface of the side plate 3,
Further, even if the side plate 3 receives wind or rain, the flexible sheet 10
Can be prevented from peeling off, nitrogen gas can be prevented from leaking, the amount of nitrogen gas used during cleaning can be reduced, the preparation and management of nitrogen gas can be saved, and the outside of the tank 1 during cleaning can be prevented. It is possible to prevent the flammable gas from leaking into the tank and improve the working environment outside the tank 1 during cleaning.
【００３８】さらに、実施例の場合には、側板３の内周
面側と同様に、浮屋根４の上面側の粘着テープ１１にお
ける浮屋根４の上面側との貼着部位を、浮屋根４に対し
て吸着可能な磁石１３を配置させて押えるように構成し
ていることから、可撓性シート１０による浮屋根４の外
周縁と側板３との隙間Ｈの閉塞を、一層確実にすること
ができる。Further, in the case of the embodiment, similarly to the inner peripheral surface side of the side plate 3, the sticking portion of the adhesive tape 11 on the upper surface side of the floating roof 4 to the upper surface side of the floating roof 4 is set to the floating roof 4 Since the magnet 13 that can be attracted to is arranged and pressed against, the closure of the gap H between the outer peripheral edge of the floating roof 4 and the side plate 3 by the flexible sheet 10 is further ensured. You can
【００３９】ちなみに、５万〜６万ＫＬ用のタンクにお
いて、洗浄時の窒素ガスの使用量は、従来の場合、４７
０００m3程度使用していたが、実施例の場合には、２１
０００m3程度の使用で済んだ。By the way, in the tank for 50,000 to 60,000 KL, the amount of nitrogen gas used for cleaning is 47 in the conventional case.
Although about 000 m 3 was used, in the case of the embodiment, 21
I used about 3,000 m 3 .
【００４０】また、洗浄後においても、可撓性シート１
０を粘着テープ１１・１２や磁石１４を利用して貼着し
ておけば、浮屋根４の外周縁と側板３との隙間Ｈを可撓
性シート１０で塞いでおくことができることから、洗浄
中のみならず、点検中にも、タンク１内への雨水の侵入
を防ぐことができ、タンク１内部での作業も円滑に行な
うことができる。The flexible sheet 1 is also cleaned.
If 0 is attached by using the adhesive tapes 11 and 12 and the magnet 14, the gap H between the outer peripheral edge of the floating roof 4 and the side plate 3 can be closed with the flexible sheet 10. It is possible to prevent rainwater from entering the tank 1 not only during the inspection but also during the inspection, and the work inside the tank 1 can be performed smoothly.
【００４１】なお、点検中に雨水がタンク１内に僅かで
も侵入すると、その侵入部位での塗装の剥離作業・内周
面の補修・再塗装が行なえなくなってしまうため、雨水
の除去作業が必要となってしまう。そして、この雨水の
侵入は、従来、浮屋根４にウェザーフード９が配置され
ていても、防ぎきれるものではなかった。If even a small amount of rainwater enters the tank 1 during the inspection, it will be impossible to remove the paint, repair the inner peripheral surface, and repaint at the invading part, so it is necessary to remove the rainwater. Will be. And even if the weather hood 9 was arrange | positioned at the floating roof 4, this invasion of rainwater was not completely prevented conventionally.
【００４２】また、実施例では、側板３の内周面側と同
様に、浮屋根４の上面側の粘着テープ１１における浮屋
根４の上面側との貼着部位を、磁石１３で押えるように
構成したが、浮屋根４の上面の外周縁には燃料油Ｏのス
ラッヂが付着し難いないために、粘着テープ１１を利用
するだけで、浮屋根４側における可撓性シート１０の縁
１０ａの剥れを防止できる場合もあるため、そのような
場合には、磁石１３を使用しなくとも良い。In addition, in the embodiment, as with the inner peripheral surface side of the side plate 3, the sticking site of the adhesive tape 11 on the upper surface side of the floating roof 4 with the upper surface side of the floating roof 4 is pressed by the magnet 13. However, since the sludge of the fuel oil O does not easily adhere to the outer peripheral edge of the upper surface of the floating roof 4, only the adhesive tape 11 is used to remove the edge 10a of the flexible sheet 10 on the floating roof 4 side. In some cases, it is not necessary to use the magnet 13 because peeling can be prevented.
【図１】本発明の実施例を実施するタンクの断面図であ
る。FIG. 1 is a cross-sectional view of a tank implementing an embodiment of the present invention.
【図２】同実施例の作業中を示す部分拡大図である。FIG. 2 is a partially enlarged view showing the operation of the same embodiment.
【図３】同実施例の作業中の部分拡大図であり、図２の
後の状態を示す。FIG. 3 is a partially enlarged view of the same embodiment during work, showing a state after FIG.
【図４】同実施例の作業中の部分拡大図であり、図３の
後の状態を示す。FIG. 4 is a partially enlarged view of the same working example, showing a state after FIG. 3;
【図５】同実施例の作業中の部分拡大図であり、図４の
後の状態を示す。5 is a partially enlarged view of the same working example during work, showing a state after FIG. 4; FIG.
１…タンク、 ２…底板、 ３…側板、 ４…浮屋根、 １０…可撓性シート、 １１・１２…粘着テープ、 １３・１４…磁石。 1 ... tank, 2 ... bottom plate, 3 ... side plate, 4 ... floating roof, 10 ... Flexible sheet, 11 ・ 12 ... Adhesive tape, 13.14 ... Magnet.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 神谷 正博 三重県三重郡川越町大字亀崎新田字朝明 87−１ 中部電力株式会社 川越火力建 設事務所内 (72)発明者 安井 稔 愛知県名古屋市港区大江町３ 中部電力 株式会社 火力センター内 (56)参考文献 特開 昭61−115872（ＪＰ，Ａ) 実開 平７−15599（ＪＰ，Ｕ) 実開 平４−97094（ＪＰ，Ｕ) 実開 平４−13762（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B65D 88/34 - 88/50 B65D 90/00 B08B 9/08 E04H 7/02 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Kamiya 87-1 Asaake, Niigata Kamezaki, Kawagoe-cho, Mie-gun, Mie Chubu Electric Power Co., Ltd.Kawagoe Thermal Power Construction Office (72) Minor Yasui Nagoya, Aichi Prefecture 3 Oemachi, Minato-ku Chubu Electric Power Co., Inc. Thermal Power Center (56) Reference JP-A-61-115872 (JP, A) Actual Kaihei 7-15599 (JP, U) Actual Kaihei 4-97094 (JP, U) Furukaihei 4-13762 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) B65D 88/34-88/50 B65D 90/00 B08B 9/08 E04H 7/02
Claims (2)
筒状の側板、及び、該側板の内周側に配置される浮屋
根、により囲まれた部位を貯蔵部位として、洗浄時に、
内部に不活性ガスを注入して内周面を洗浄する浮屋根式
タンクの洗浄方法であって、 前記浮屋根上面側における前記浮屋根外周縁と前記側板
内周面との隙間を可撓性シートで覆い、 該可撓性シートの両縁を、それぞれ、前記浮屋根上面側
と前記側板内周面側とに粘着テープで止め、 前記側板内周面側の前記粘着テープの前記側板内周面側
との貼着部位を、前記側板に対して吸着可能な磁石を配
置させて押え、 その後、内部に不活性ガスを注入して内周面を洗浄する
ことを特徴とする浮屋根式タンクの洗浄方法。1. A portion surrounded by a bottom plate, a cylindrical side plate extending upward from an outer peripheral edge of the bottom plate, and a floating roof arranged on an inner peripheral side of the side plate as a storage site, at the time of cleaning,
A method for cleaning a floating roof type tank in which an inner surface is cleaned by injecting an inert gas, wherein the clearance between the outer peripheral edge of the floating roof and the inner peripheral surface of the side plate on the upper surface side of the floating roof is flexible. A sheet, and both edges of the flexible sheet are fixed to the upper surface of the floating roof and the inner peripheral surface of the side plate with adhesive tape, and the inner peripheral surface of the adhesive tape on the inner peripheral surface side of the side plate A floating roof tank characterized in that a magnet that can be attracted to the side plate is arranged and pressed at a portion to be attached to the surface side, and then an inner surface is cleaned by injecting an inert gas into the inside. Cleaning method.
記浮屋根上面側との貼着部位を、前記浮屋根に対して吸
着可能な磁石を配置させて押えることを特徴とする請求
項１記載の浮屋根式タンクの洗浄方法。2. A magnet capable of adsorbing to the floating roof is arranged to press a portion where the adhesive tape on the upper surface of the floating roof is attached to the upper surface of the floating roof. The method for cleaning the floating roof tank described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19991094A JP3385493B2 (en) | 1994-08-24 | 1994-08-24 | Cleaning method of floating roof tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19991094A JP3385493B2 (en) | 1994-08-24 | 1994-08-24 | Cleaning method of floating roof tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0858882A JPH0858882A (en) | 1996-03-05 |
| JP3385493B2 true JP3385493B2 (en) | 2003-03-10 |
Family
ID=16415643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19991094A Expired - Fee Related JP3385493B2 (en) | 1994-08-24 | 1994-08-24 | Cleaning method of floating roof tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3385493B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2747061C1 (en) * | 2020-08-21 | 2021-04-23 | Валерий Иванович Паутов | Module of perimeter sealing gate for floating roof of vertical tank |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6511491B2 (en) * | 2017-07-27 | 2019-05-15 | 株式会社ハシモト | Temporary seal structure of storage tank |
-
1994
- 1994-08-24 JP JP19991094A patent/JP3385493B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2747061C1 (en) * | 2020-08-21 | 2021-04-23 | Валерий Иванович Паутов | Module of perimeter sealing gate for floating roof of vertical tank |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0858882A (en) | 1996-03-05 |
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