JPH08282798A - System for draining tank water - Google Patents
System for draining tank waterInfo
- Publication number
- JPH08282798A JPH08282798A JP8970795A JP8970795A JPH08282798A JP H08282798 A JPH08282798 A JP H08282798A JP 8970795 A JP8970795 A JP 8970795A JP 8970795 A JP8970795 A JP 8970795A JP H08282798 A JPH08282798 A JP H08282798A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- water
- boundary surface
- storage tank
- small
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 11
- 239000010779 crude oil Substances 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 20
- 230000000875 corresponding Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000001702 transmitter Effects 0.000 description 2
- 230000002238 attenuated Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003657 drainage water Substances 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000576 supplementary Effects 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、タンク水切り用システ
ムに関し、より詳細には、実質的に水に溶解しない液体
の貯蔵タンクについて、貯蔵タンクのドレン管に連通し
た小型タンクを介して貯蔵タンク内に混入し、該タンク
内で分離した水を自動的に排出するタンク水切り用シス
テムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for draining a tank, and more particularly to a storage tank for a liquid which is substantially insoluble in water, through a small tank communicating with a drain pipe of the storage tank. The present invention relates to a system for draining a tank that automatically discharges water mixed in the tank and separated in the tank.
【０００２】[0002]
【従来の技術】石油は、石油化学工業における原料や火
力発電所，航空機，自動車等のエネルギ源として用いら
れるが、我が国においては、殆どが海外からの輸入に依
存している。海外の産油国からは原油の形でタンカー輸
送され、多くは一旦、石油基地の貯蔵タンクに貯蔵され
て、必要に応じて精油所に輸送される。精油所で受入れ
られた原油も一旦貯蔵タンクに貯蔵されるが、これらの
貯蔵タンク内に収容された原油には多少の水分が含まれ
ている。2. Description of the Related Art Petroleum is used as a raw material in the petrochemical industry and as an energy source for thermal power plants, aircraft, automobiles, etc., but in Japan, most depend on imports from abroad. Tankers are transported in the form of crude oil from overseas oil-producing countries, and most of them are temporarily stored in oil tank storage tanks and transported to refineries as needed. The crude oil received at the refinery is also temporarily stored in the storage tanks, but the crude oil contained in these storage tanks contains some water.
【０００３】貯蔵タンク内に目的とする液体の他に水が
含まれていると、後続の配管や装置を腐蝕させる危険が
ある。例えば、原油等、水分を含んだ油が貯蔵タンク内
にあるとき、油水分離することなく後続の蒸留装置等に
導入すると、そこで、腐蝕、ファウリング等の問題が発
生する。従って、油水を分離し、効果的に水を除くこと
は、上記問題を少くし、更に、その製品性状の向上に効
果的である。If the storage tank contains water in addition to the desired liquid, there is a risk of corroding the subsequent piping and equipment. For example, when oil containing water, such as crude oil, is in a storage tank and introduced into a subsequent distillation apparatus or the like without oil-water separation, there arises problems such as corrosion and fouling. Therefore, separating oil water and effectively removing water is effective in reducing the above problems and further improving the product properties.
【０００４】[0004]
【発明が解決しようとする課題】貯蔵タンクからの水の
除去は、現状では手動によりバルブを開放し、バルブか
らの流出物が水から油に変化したことを目視により判断
し、バルブを閉めるようにしている。この作業は、非常
に厄介で時間がかかり、又、危険な作業である。しか
も、貯蔵タンク底板上に広く分布する水を効率的にタン
クより取り除き、少しずつバルブを開放しゆっくり水を
除く必要があり、これは時間的に限界がある。In order to remove water from the storage tank, it is currently necessary to manually open the valve, visually judge that the effluent from the valve has changed from water to oil, and then close the valve. I have to. This task is very cumbersome, time consuming and dangerous. Moreover, it is necessary to efficiently remove the water widely distributed on the bottom plate of the storage tank from the tank, and gradually open the valve to slowly remove the water, which is limited in time.
【０００５】一方、このような排水操作を自動的に行う
ためには、一般に水と油との境界面を検出して、検出値
に基づいて自動操作することが考えられる。しかし、原
油等の危険物を貯蔵する貯蔵タンクに新規に境界面検出
装置を取り付けるためには、工場電気設備防爆指針に定
められた防爆認可が必要であるなど手続が煩雑であるば
かりでなく、該検出装置のセンサ部がタンク内部にある
ため、その洗浄、取り換えなどの作業はタンク内容物を
除かなければならないなど多くの制約を受ける。On the other hand, in order to automatically perform such drainage operation, it is generally considered that the boundary surface between water and oil is detected and the automatic operation is performed based on the detected value. However, in order to newly install a boundary surface detection device in a storage tank that stores dangerous substances such as crude oil, not only is the procedure complicated, such as the explosion proof approval set in the factory electrical equipment explosion proof guidelines, Since the sensor part of the detection device is inside the tank, the cleaning and replacement work is subject to many restrictions such as the need to remove the contents of the tank.
【０００６】本発明は、上述した課題を解決するため
に、ドレン管貯蔵タンクのドレン管を利用してタンク底
部の水を外部に導き、これを小型タンクに収容して境界
面を検出することにより、貯蔵タンク内の水を自動排出
を行うことを目的とするものである。In order to solve the above-mentioned problems, the present invention uses a drain pipe of a drain pipe storage tank to guide water at the bottom of the tank to the outside and stores it in a small tank to detect the boundary surface. The purpose is to automatically discharge the water in the storage tank.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するために、（１）比重が水より小さく、実質的に水
に溶解しない液体が収容された貯蔵タンクから、混入し
た水を排出する水切りシステムにおいて、前記貯蔵タン
クと別体で、該貯蔵タンクの排水管（ドレン管）と連通
された小型タンクと、該小型タンク内の水を排出する排
水管に取り付けられた排出バルブと、前記小型タンクの
前記連通位置区間内において、前記液体と水との境界面
が上部に達したことを検知する第１境界面検出器と、下
方に達したことを検知する第２境界面検出器とを有し、
第１，第２境界面検出器の信号に基づいて前記排出バル
ブを開閉し、前記貯蔵タンク内の水を排出すること、更
には、（２）前記（１）において、前記小型タンクに設
けられた前記排水管と下部連通管をタンク壁面の対向し
た位置に配置し、該排水管と下部連通管の間を支切る所
定高さの支切板を前記小型タンク内に設けたこと、更に
は、（３）前記（２）において、前記小型タンク内に設
けられた前記第１，第２境界面検出器が万一検出不良と
なったとき、検出不良により前記小型タンク内の液が排
出するのを防ぐ保護手段を設けたこと、更には、（４）
前記（１）乃至（３）の何れかにおいて、前記小型タン
クの前記排水管の断面積を前記下部連通管の断面積より
も小さくしたこと、更には、（５）前記（１）乃至
（４）において、実質的に水に溶解しない液体が原油で
あることを特徴としたものである。In order to solve the above-mentioned problems, the present invention (1) removes mixed water from a storage tank containing a liquid having a specific gravity smaller than that of water and substantially insoluble in water. In the draining system for discharging, a small tank which is separate from the storage tank and communicates with a drain pipe (drain pipe) of the storage tank, and a discharge valve attached to the drain pipe for discharging the water in the small tank. A first boundary surface detector for detecting that the boundary surface between the liquid and water has reached the upper portion, and a second boundary surface detection for detecting that the lower boundary portion has reached within the communication position section of the small tank. And a vessel,
Draining the water in the storage tank by opening and closing the drain valve based on signals from the first and second boundary surface detectors; and (2) in (1), the small tank is provided. The drain pipe and the lower communication pipe are arranged at opposite positions on the wall surface of the tank, and a partition plate of a predetermined height that divides the drain pipe and the lower communication pipe is provided in the small tank. (3) In (2), if the first and second boundary surface detectors provided in the small tank have a detection failure, the liquid in the small tank is discharged due to the detection failure. The protection means to prevent the above is provided, and further, (4)
In any one of (1) to (3) above, the cross-sectional area of the drain pipe of the small tank is smaller than the cross-sectional area of the lower communication pipe, and (5) above (1) to (4) ), The liquid that is substantially insoluble in water is crude oil.
【０００８】本発明において、実質的に水に溶解しない
液とは、水と界面を作って分離する液体であり、具体的
には原油、各種石油製品など炭化水素類であり、以後、
実質的に水に溶解しない液を油と記す。これらには本
来、水が混入することは好まれていないが、タンクに入
る前段の状態、操作によって混入が免れえないものであ
る。そこでタンクに送られた後、該タンク内で静置し
て、タンク下部に分離した水を時々排出するという手段
がとられている。In the present invention, the liquid which is substantially insoluble in water is a liquid which forms an interface with water and separates, and is specifically hydrocarbons such as crude oil and various petroleum products.
A liquid that is substantially insoluble in water is referred to as an oil. Originally, it is not preferred that water be mixed in, but it is inevitable that water will be mixed in depending on the state and operation before entering the tank. Therefore, after being sent to the tank, a measure is taken in which the water is allowed to stand still in the tank and the separated water is occasionally discharged to the lower part of the tank.
【０００９】本発明は、この分離した水を該タンクの排
水管を通して別に設置した小型タンクに導くようにす
る。該小型タンクと貯蔵タンクは上部で連通させること
で両タンクの液レベル、静圧の関係を同じにしておく。
該小型タンクには境界面検出器を設置し、この検出器か
らの情報により自動的に小型タンクから水を排出しよう
とするものである。ここで境界面検出器は、該液と水と
の境界が検知できるものであれば何でもよいが、具体的
に両液の物性の差、たとえば、マイクロウェーブのエネ
ルギー吸収率、超音波の伝播速度、誘電率、屈折率など
を利用して相違を検出するなどの手段が適用される。According to the present invention, the separated water is guided to a separately installed small tank through the drain pipe of the tank. The small tank and the storage tank are connected at the upper part so that the relationship between the liquid level and the static pressure of both tanks is the same.
An interface detector is installed in the small tank, and water is automatically discharged from the small tank based on information from the detector. Here, the boundary surface detector may be anything as long as it can detect the boundary between the liquid and water, but specifically, the difference in the physical properties of the two liquids, for example, the energy absorption rate of microwaves and the propagation speed of ultrasonic waves. Means such as detecting a difference using the dielectric constant, the refractive index, etc. are applied.
【００１０】小型タンクの大きさは、本発明の趣旨が達
せられればよく、なんら制限を加えるものではないが、
たとえば、１万トンの貯蔵タンクでは、小型タンクは高
さ５０ｃｍ、外径が３０ｃｍ程度である。又、小型タン
クの排水管の断面積は、貯蔵タンクの排水管の断面積よ
り小さくし、貯蔵タンクからの排水が小型タンクを経由
して安定して排出されるようにする。小型タンク内の境
界面検出器は、基本的には２本、それぞれ高さが異なる
ように設置し、該液と水との境界が、常に低い方の境界
面検出器と高い方の境界面検出器の間にあるように制御
するものである。これら２本の境界面検出器以外に、補
足的に他の箇所にも境界面検出器を設置し、万一、ある
特定の境界面検出器が作動しなかった場合も大きな問題
を起こさないよう備えることは、操業上必要なことであ
り、本発明はこれら補助的な目的の境界面検出器設置に
なんら制限を加えるものではない。The size of the small tank may be any size as long as the gist of the present invention can be achieved, and there is no limitation.
For example, in a 10,000 ton storage tank, a small tank has a height of 50 cm and an outer diameter of about 30 cm. Also, the cross-sectional area of the drain pipe of the small tank is made smaller than the cross-sectional area of the drain pipe of the storage tank so that the drainage water from the storage tank is stably discharged through the small tank. Basically, two boundary surface detectors in a small tank are installed so that their heights are different, and the boundary between the liquid and water is always the lower boundary surface detector and the higher boundary surface. It is controlled so that it is between the detectors. In addition to these two boundary surface detectors, supplementary boundary surface detectors are installed at other locations so that if a specific boundary surface detector does not work, it will not cause a big problem. Provision is necessary for operation and the present invention does not limit the installation of these boundary detectors for auxiliary purposes.
【００１１】[0011]
【作用】比重が水より小さく、実質的に水に溶解しない
液（油）を貯蔵する既設の貯蔵タンクに、該貯蔵タンク
と別体で、排水管を有する小型タンクを設置して、貯蔵
タンクのドレン管と連通するとともに、小型タンクと貯
蔵タンクとを上部で連通することにより互いの液レベル
と静圧の関係を同じにする。小型タンク内には、境界面
を検出するレベル方向に所定レベル間隔をもって設けら
れた少くとも一対の境界面検出器により、相の境界面を
検出して小型タンクの排水管に設けられた排出弁を駆動
し、排水管から自動的に水を排出する。[Operation] A small tank having a drain pipe is installed in an existing storage tank that stores a liquid (oil) that has a specific gravity smaller than that of water and that is substantially insoluble in water, and that has a drain pipe. The small tank and the storage tank are communicated with each other at the upper portion while being communicated with the drain pipe of No. 1, so that the relationship between the liquid level and the static pressure is the same. The discharge valve provided in the drain pipe of the small tank by detecting the phase boundary surface by at least a pair of boundary surface detectors provided in the small tank at a predetermined level interval in the level direction for detecting the boundary surface. Drive and automatically drain the water from the drain.
【００１２】[0012]
【実施例】図１は、本発明の水切り用システムの一例を
説明するための図で、図中、１は貯蔵タンク、２は小型
タンク、３はドレン管、４は上部連通管、５は第１境界
面検出器、６は第２境界面検出器、７は制御装置、
Ｖ1，Ｖ3は弁、Ｖ2は排出弁である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view for explaining an example of a water draining system of the present invention, in which 1 is a storage tank, 2 is a small tank, 3 is a drain pipe, 4 is an upper communicating pipe, and 5 is a communicating pipe. A first boundary surface detector, 6 a second boundary surface detector, 7 a controller,
V 1 and V 3 are valves, and V 2 is a discharge valve.
【００１３】図１において、貯蔵タンク１は、既設のも
ので底部１ａがグランドラインＧＬで設置されている。
小型タンク２は貯蔵タンク１と別体で、貯蔵タンク１と
同様にＧＬ上に設置されている。貯蔵タンク１と小型タ
ンク２とは、互いの下部位置近傍で貯蔵タンク１のドレ
ン管３と小型タンク２の下部連通管２ａとで常時開弁さ
れている弁Ｖ1を介して連通し、かつ上部で常時開弁さ
れている弁Ｖ3を有する上部連通管４により連通されて
いる。In FIG. 1, a storage tank 1 is an existing one, and a bottom portion 1a is installed by a ground line GL.
The small tank 2 is separate from the storage tank 1 and is installed on the GL like the storage tank 1. The storage tank 1 and the small tank 2 communicate with each other via a valve V 1 which is constantly opened between the drain pipe 3 of the storage tank 1 and the lower communication pipe 2a of the small tank 2 in the vicinity of their lower positions, and It is communicated by an upper communication pipe 4 having a valve V 3 which is normally opened at the upper part.
【００１４】また、小型タンク２には、油と水との境界
面が、小型タンク２の上部の定められたレベルに達した
ことを検出する第１境界面検出器５と、下部の定められ
た位置に達したことを検出する第２境界面検出器６とが
装着され、第１境界面検出器５と第２境界面検出器６と
は制御装置７に接続され、制御装置７の出力により排出
弁Ｖ2が開閉駆動される。Further, in the small tank 2, a first boundary surface detector 5 for detecting that the boundary surface between oil and water has reached a predetermined level in the upper portion of the small tank 2, and in the lower portion is defined. A second boundary surface detector 6 for detecting that the position has reached a predetermined position, the first boundary surface detector 5 and the second boundary surface detector 6 are connected to the control device 7, and the output of the control device 7 Thus, the discharge valve V 2 is opened and closed.
【００１５】貯蔵タンク１内には、比重が水より小さい
油が収容され、その下層に水が分離して収容されてい
る。排出弁Ｖ2は常時閉弁され、弁Ｖ1，Ｖ3は開弁され
ているので、貯蔵タンク１と小型タンク２内の静圧は等
しく、両タンク内の油と水との境界面は常に同一レベル
に保たれている。In the storage tank 1, oil having a specific gravity smaller than that of water is contained, and water is separated and contained in the lower layer. Since the discharge valve V 2 is normally closed and the valves V 1 and V 3 are open, the static pressures in the storage tank 1 and the small tank 2 are equal, and the boundary surface between oil and water in both tanks is It is always kept at the same level.
【００１６】図２は、マイクロウェーブエネルギーの吸
収率差を利用した境界面検出器の一例の原理を説明する
ための図で、図中、１０は被測定液体、１１はマイクロ
ウェーブ発信器、１２は受信器、１３は差動アンプであ
る。FIG. 2 is a diagram for explaining the principle of an example of a boundary surface detector utilizing the difference in absorption rate of microwave energy. In the figure, 10 is a liquid to be measured, 11 is a microwave oscillator, and 12 is a microwave oscillator. Is a receiver and 13 is a differential amplifier.
【００１７】被測定液体１０の中で、マイクロウェーブ
発信器１１から所定間隔をもって設けられた受信器１２
に向け一定レベルのマイクロウェーブを発信すると、受
信器１２の受信信号は油と水との混合比に比例して減衰
される。例えば、油と水だけであれば１：５の出力とな
り、出力差に基づいて油，水が検出される。実際の濃度
信号は、受信器１２の信号と基準電圧とを比較する差動
アンプ１３を介して差動アンプ１３の出力をマイクロウ
ェーブ発信器１１の入力側に負帰還することにより、安
定した液濃度信号が求められ、境界面があるときは出力
された液濃度信号差から境界面が検出される。In the liquid to be measured 10, a receiver 12 provided at a predetermined distance from a microwave transmitter 11.
When a microwave of a certain level is transmitted toward the receiver, the reception signal of the receiver 12 is attenuated in proportion to the mixing ratio of oil and water. For example, if only oil and water are output, the output is 1: 5, and oil and water are detected based on the output difference. The actual concentration signal is a stable liquid by negatively feeding back the output of the differential amplifier 13 to the input side of the microwave oscillator 11 via the differential amplifier 13 which compares the signal of the receiver 12 with the reference voltage. The concentration signal is obtained, and if there is a boundary surface, the boundary surface is detected from the output liquid concentration signal difference.
【００１８】このような第１境界面検出器５により、水
が図１に示したレベルＨ1に達したことを検出すると、
制御装置７は排出弁Ｖ2を開弁して小型タンク２内の水
を排出する。水が排出して水レベルが低下し、境界面が
レベルＨ2に達すると第２境界面検出器６が水との境界
面のレベルＨ2を検出し、排出弁Ｖ2を閉じる。When the first boundary surface detector 5 as described above detects that the water has reached the level H 1 shown in FIG. 1,
The controller 7 opens the drain valve V 2 to drain the water in the small tank 2. When the water is discharged and the water level decreases, and the boundary surface reaches the level H 2 , the second boundary surface detector 6 detects the level H 2 of the boundary surface with the water and closes the discharge valve V 2 .
【００１９】このようにして、貯蔵タンク１内の水は、
常にレベルＨ1とＨ2との間の範囲内にあるように、自動
的に制御される。貯蔵タンク１内の水の量が多く、水圧
が高くなったり、または、水量が多いときには、下部連
通管２ａから流出した油が排出管２ｂから流出する等の
要因を作る。In this way, the water in the storage tank 1 is
It is automatically controlled so that it is always in the range between levels H 1 and H 2 . When the amount of water in the storage tank 1 is large and the water pressure becomes high, or when the amount of water is large, it causes a factor such as the oil flowing out from the lower communication pipe 2a flowing out from the discharge pipe 2b.
【００２０】実施例２（請求項２） 図３は、本発明に係る小型タンクの他の実施例を説明す
るための図で、図中、８は隔板、９は第３境界面検出器
であり、図１と同様の作用をする部分には、図３と同じ
参照番号が付してある。Embodiment 2 (Claim 2) FIG. 3 is a view for explaining another embodiment of the small tank according to the present invention, in which 8 is a partition plate and 9 is a third boundary surface detector. The same reference numerals as those in FIG. 3 are attached to the portions having the same functions as those in FIG.
【００２１】隔板８は、小型タンク２の底面の中央部に
所定の高さ、例えばＨ2をも取り付けられ、下部連通管
２ａと排出管２ｂとを支切る支切板である。このため、
下部連通管２ａと排水管２ｂとは小型タンク２の対向し
た位置に取り付けられている。The partition plate 8 is a partition plate which is attached with a predetermined height, for example, H 2 , at the center of the bottom surface of the small tank 2 and which divides the lower communication pipe 2a and the discharge pipe 2b. For this reason,
The lower communication pipe 2a and the drain pipe 2b are attached to the small tank 2 at opposite positions.
【００２２】この場合の水切り動作も、図１に示した場
合と同様に、貯蔵タンク１内の水は、第１，第２境界面
検出器５，６が設けられたレベルＨ1とＨ2との間で排出
弁Ｖ2が開弁され、第２レベル検出器６によるレベル検
出信号によりレベルＨ2に保たれる。Also in the water draining operation in this case, as in the case shown in FIG. 1, the water in the storage tank 1 has levels H 1 and H 2 at which the first and second boundary surface detectors 5 and 6 are provided. The discharge valve V 2 is opened between and, and is maintained at the level H 2 by the level detection signal from the second level detector 6.
【００２３】第３境界面検出器９は、レベルＨ2よりも
低いレベルＨ3の位置の境界面を検出するためのもの
で、第２境界面検出器６が故障したとき、排出弁Ｖ2は
開弁状態となり、油液が流出する危険がある。第３境界
面検出器９は、このような油液排出の危険を防止するこ
とができる。このために、制御装置７内では、第２，第
３境界面検出器６，９の信号をＯＲ回路（図示せず）を
介して処理出力される。なお、第１〜３境界面検出器
５，６，９はマイクロウェーブエネルギーの吸収率差を
利用した検出手段としたが、当然乍らその他濃度差、誘
電率差、音波伝播差等を用いる検出手段のものでもよ
い。The third boundary surface detector 9 is for detecting the boundary surface at the position of the level H 3 lower than the level H 2 , and when the second boundary surface detector 6 fails, the discharge valve V 2 Is opened and there is a danger of oil liquid leaking out. The third boundary surface detector 9 can prevent such a risk of oil liquid discharge. Therefore, in the controller 7, the signals of the second and third boundary surface detectors 6 and 9 are processed and output via an OR circuit (not shown). The first to third boundary surface detectors 5, 6 and 9 are detection means utilizing the difference in absorption rate of microwave energy, but naturally, detection using other concentration difference, dielectric constant difference, sound wave propagation difference, etc. It may be a means.
【００２４】また、万一、第１境界面検出器５が境界面
の検出不能となった場合の処置としては、タイマー回路
（図示せず）を設け、第２境界面検出器６により境界面
を検出したあとタイマー回路で設定された時間が経過し
たとき、排出弁Ｖ2を開弁して水を排出し、第２境界面
検出器６の信号により閉弁させる。更に、また、水の上
昇速度が早く、タイマー回路に設定された時間内に小型
タンク２が水で充たされた場合には、第１，２，３境界
面検出器５，６，９は水を検出し、排出弁Ｖ2は閉じら
れているので、上部連通管４，弁３を介して貯蔵タンク
に戻される（請求項３に対応）。If the first boundary surface detector 5 cannot detect the boundary surface, a timer circuit (not shown) is provided and the second boundary surface detector 6 is used to detect the boundary surface. When the time set by the timer circuit elapses after the detection of "," the discharge valve V 2 is opened to discharge water, and the signal is output from the second boundary surface detector 6 to close it. Furthermore, when the rising speed of water is high and the small tank 2 is filled with water within the time set in the timer circuit, the first, second, third boundary surface detectors 5, 6, 9 are Since water is detected and the discharge valve V 2 is closed, it is returned to the storage tank via the upper communication pipe 4 and the valve 3 (corresponding to claim 3).
【００２５】上述したタンク水切り用システムにおい
て、小型タンク２に設けられた排水管２ｂの断面積が下
部連通管２ａの断面積と等しいか大きい場合は、貯蔵タ
ンク１内の油が小型タンク２を通り、排出弁Ｖ2から系
側に流出する危険があるため、排水管２ｂの断面積を下
部連通管２ａの断面積よりも小さくする（請求項４に対
応）。この結果、小型タンク２内の水は排水管２ｂを通
り安定して流出することができる（請求項４に対応）。In the above-described tank draining system, when the cross-sectional area of the drain pipe 2b provided in the small tank 2 is equal to or larger than the cross-sectional area of the lower communication pipe 2a, the oil in the storage tank 1 causes the small tank 2 to flow. As described above, the cross-sectional area of the drain pipe 2b is made smaller than the cross-sectional area of the lower communication pipe 2a because there is a risk of flowing out from the discharge valve V 2 to the system side (corresponding to claim 4). As a result, the water in the small tank 2 can stably flow out through the drain pipe 2b (corresponding to claim 4).
【００２６】上述のように、実質的に水に溶解しない液
として水と界面を作って分離するすべての液であるが、
本発明によるタンク水切りシステムは、貯蔵量の大きい
原油のタンク等に適用することが効果的である（請求項
５に対応）。As mentioned above, all liquids that form an interface with water and separate as liquids that are substantially insoluble in water,
The tank drainer system according to the present invention is effectively applied to a crude oil tank or the like having a large storage amount (corresponding to claim 5).
【００２７】[0027]
【発明の効果】以上の説明から明らかなように、本発明
によると下記の効果がある。 請求項１に対応した効果：既設の貯蔵タンクのドレン管
を利用して小型タンクを連通設置し、該小型タンク内の
上下所定区間で油と水との境界面を検出して水の排出弁
を開閉駆動するようにしたので、タンク水切りの自動化
がなされる。 請求項２に対応する効果：小型タンク内に下部連通管と
排水管とを支切る支切を設けたので、小型タンク内の液
が急激に流れて系外に排出されることはなくなる。 請求項３に対応する効果：上下境界面検出器の何れか、
または両方が検出不能になっても液を系側に流出させる
危険を防ぐことができる。 請求項４に対応する効果：排水管の断面積を貯蔵タンク
のドレン管よりも小面積としたので、水が少ないときで
も油が系外に流出することはない。 請求項５に対応する効果：小型タンクの大きさは、一万
トンの貯蔵タンクに対して高さが５０ｃｍ、外径が３０
ｃｍ程度の小さい形状であるから、特に、貯蔵量の大き
い原油タンクに適用して効果的である。As is apparent from the above description, the present invention has the following effects. Effect corresponding to claim 1: A small tank is installed in communication using a drain pipe of an existing storage tank, a boundary surface between oil and water is detected in upper and lower predetermined sections of the small tank, and a water discharge valve is detected. Since it is driven to open and close, the drainage of the tank can be automated. Advantageous effect corresponding to claim 2: Since the small tank is provided with the partition for supporting the lower communication pipe and the drainage pipe, the liquid in the small tank does not suddenly flow and is discharged to the outside of the system. Effect corresponding to claim 3: Any of the upper and lower boundary surface detectors,
Alternatively, even if both cannot be detected, the risk of the liquid flowing out to the system side can be prevented. Effect corresponding to claim 4: Since the cross-sectional area of the drainage pipe is smaller than that of the drain pipe of the storage tank, oil does not flow out of the system even when the amount of water is small. Effect corresponding to claim 5: The size of the small tank is 50 cm in height and 30 mm in outer diameter with respect to a storage tank of 10,000 tons.
Since the shape is as small as about cm, it is particularly effective when applied to a crude oil tank having a large storage amount.
【図１】 本発明の水切り用システムの一例を説明する
ための図である。FIG. 1 is a view for explaining an example of a water draining system of the present invention.
【図２】 マイクロウェーブエネルギーの吸収率差を利
用した境界面検出器の一例の原理を説明するための図で
ある。FIG. 2 is a diagram for explaining the principle of an example of a boundary surface detector that uses a difference in absorption rate of microwave energy.
【図３】 本発明に係る小型タンクの他の実施例を説明
するための図である。FIG. 3 is a diagram for explaining another embodiment of the small tank according to the present invention.
１…貯蔵タンク、２…小型タンク、３…ドレン管、４…
上部連通管、５…第１境界面検出器、６…第２境界面検
出器、７…制御装置、Ｖ1，Ｖ3…弁、Ｖ2…排出弁、８
…隔板、９…第３境界面検出器、１０…被測定液体、１
１…マイクロウェーブ発信器、１２…受信器、１３…差
動アンプ。1 ... Storage tank, 2 ... Small tank, 3 ... Drain pipe, 4 ...
Upper communicating tube, 5 ... first interface detector, 6 ... second interface detector, 7 ... control unit, V 1, V 3 ... valve, V 2 ... discharge valve, 8
... Separator plate, 9 ... Third boundary surface detector, 10 ... Liquid to be measured, 1
1 ... Microwave transmitter, 12 ... Receiver, 13 ... Differential amplifier.
Claims (5)
しない液体が収容された貯蔵タンクから混入した水を排
出する水切りシステムにおいて、前記貯蔵タンクと別体
で、該貯蔵タンクの排水管（ドレン管）と連通された小
型タンクと、該小型タンク内の水を排出する排水管に取
り付けられた排出バルブと、前記小型タンクの前記連通
位置区間内において、前記液体と水との境界面が上部に
達したことを検知する第１境界面検出器と、下方に達し
たことを検知する第２境界面検出器とを有し、第１，第
２境界面検出器の信号に基づいて前記排出バルブを開閉
し、前記貯蔵タンク内の水を排出することを特徴とする
タンク水切り用システム。1. A drainage system for draining mixed water from a storage tank containing a liquid which has a specific gravity smaller than that of water and is substantially insoluble in water, the drain pipe of the storage tank being separate from the storage tank. A small tank communicating with the (drain pipe), a discharge valve attached to a drain pipe for discharging water in the small tank, and a boundary surface between the liquid and water in the communication position section of the small tank. Has a first boundary surface detector for detecting that it has reached the upper portion, and a second boundary surface detector for detecting that it has reached the lower portion, and based on the signals of the first and second boundary surface detectors. A system for draining the tank, wherein the drain valve is opened and closed to drain the water in the storage tank.
と下部連通管をタンク壁面の対向した位置に配置し、該
排水管と下部連通管の間を支切る所定高さの支切板を前
記小型タンク内に設けたことを特徴とする請求項１に記
載のタンク水切り用システム。2. The drainage pipe and the lower communication pipe provided in the small tank are arranged at positions facing each other on a wall surface of the tank, and a partition plate having a predetermined height is provided to partition the drainage pipe and the lower communication pipe. The tank drainer system according to claim 1, wherein the system is provided in the small tank.
１，第２境界面検出器が検出不良となったとき、検出不
良により前記小型タンク内の液が排出するのを防ぐ保護
手段を設けたことを特徴とする請求項１又は２に記載の
タンク水切り用システム。3. When the first and second boundary surface detectors provided in the small tank have a detection failure, a protection means is provided to prevent the liquid in the small tank from being discharged due to the detection failure. The system for draining tank according to claim 1 or 2, characterized in that.
前記下部連通管の断面積よりも小さくしたことを特徴と
する請求項１乃至３の何れかに記載のタンク水切り用シ
ステム。4. The tank drainer system according to claim 1, wherein a cross-sectional area of the drain pipe of the small tank is smaller than a cross-sectional area of the lower communication pipe.
ることを特徴とする請求項１又は２又は３又は４に記載
のタンク水切り用システム。5. The tank drainer system according to claim 1, wherein the liquid that is substantially insoluble in water is crude oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8970795A JP2966312B2 (en) | 1995-04-14 | 1995-04-14 | Tank draining system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8970795A JP2966312B2 (en) | 1995-04-14 | 1995-04-14 | Tank draining system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08282798A true JPH08282798A (en) | 1996-10-29 |
| JP2966312B2 JP2966312B2 (en) | 1999-10-25 |
Family
ID=13978257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8970795A Expired - Lifetime JP2966312B2 (en) | 1995-04-14 | 1995-04-14 | Tank draining system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2966312B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563358A (en) * | 2012-01-01 | 2012-07-11 | 北京首钢建设集团有限公司 | Self-closing type water drain apparatus for gas and service method of self-closing water drain apparatus |
| CN106043980A (en) * | 2016-05-26 | 2016-10-26 | 高翔 | Method and system for achieving automatic water cutting and oil return through petrochemical storage tank water drainage pipe |
| CN106422425A (en) * | 2016-10-18 | 2017-02-22 | 国网山东省电力公司烟台供电公司 | Oil-water separating sewage drain device for transformer oil reservoir |
| US10030498B2 (en) | 2014-12-23 | 2018-07-24 | Fccl Partnership | Method and system for adjusting the position of an oil-water interface layer |
| US11273392B2 (en) | 2016-08-26 | 2022-03-15 | FAUDI Aviation GmbH | Separating device for fluid-collecting sumps and fluid container devices comprising such a separating device |
-
1995
- 1995-04-14 JP JP8970795A patent/JP2966312B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102563358A (en) * | 2012-01-01 | 2012-07-11 | 北京首钢建设集团有限公司 | Self-closing type water drain apparatus for gas and service method of self-closing water drain apparatus |
| US10030498B2 (en) | 2014-12-23 | 2018-07-24 | Fccl Partnership | Method and system for adjusting the position of an oil-water interface layer |
| CN106043980A (en) * | 2016-05-26 | 2016-10-26 | 高翔 | Method and system for achieving automatic water cutting and oil return through petrochemical storage tank water drainage pipe |
| US11273392B2 (en) | 2016-08-26 | 2022-03-15 | FAUDI Aviation GmbH | Separating device for fluid-collecting sumps and fluid container devices comprising such a separating device |
| CN106422425A (en) * | 2016-10-18 | 2017-02-22 | 国网山东省电力公司烟台供电公司 | Oil-water separating sewage drain device for transformer oil reservoir |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2966312B2 (en) | 1999-10-25 |
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