JPS6383309A - Drainage device - Google Patents
Drainage deviceInfo
- Publication number
- JPS6383309A JPS6383309A JP22546286A JP22546286A JPS6383309A JP S6383309 A JPS6383309 A JP S6383309A JP 22546286 A JP22546286 A JP 22546286A JP 22546286 A JP22546286 A JP 22546286A JP S6383309 A JPS6383309 A JP S6383309A
- Authority
- JP
- Japan
- Prior art keywords
- upstream
- water level
- downstream
- drainage
- variable gate
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 45
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims 1
- 230000005587 bubbling Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000004364 calculation method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005187 foaming Methods 0.000 description 4
- 239000006200 vaporizer Substances 0.000 description 4
- 239000003949 liquefied natural gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 101100420946 Caenorhabditis elegans sea-2 gene Proteins 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Barrages (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、上流側と下流側の間に可変ゲートを設け、こ
の可変ゲートの開閉により上流側水位を−・定に保つ排
水装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drainage device that provides a variable gate between an upstream side and a downstream side, and maintains the water level on the upstream side at a constant level by opening and closing the variable gate. It is.
［従来技術とその問題点］
海水を利用してＬＮＧ （液化天然ガス）を気化する装
置例えばオープンラック式ベーパーライザー笠から排水
される海水はこれを直接外海に排水すると排水落差によ
り大量の泡を発生させ、海生物に悪い影響を与えたり、
前記ベーパーライザーの取水ポンプに悪影響を及ぼすこ
とから、第２図に示すように排水路０１内に可変ゲー）
０２を設け、この可変ゲート０２により落差つまり上流
側の水位Ｌ１をｉＡ！１して泡立ちを防止するという工
夫が行なわれている。そして、この可変ゲート０２の調
整は上流側においてその水位Ｌ１を上流水位検出器０３
で検出し、この情報を基にコントローラー０４で可変ゲ
ート０２の開度を演算して可変ゲー）０２を開閉調整す
るというフィードバック方式である。[Prior art and its problems] Equipment for vaporizing LNG (liquefied natural gas) using seawater For example, if seawater drained from an open rack vaporizer shade is directly drained into the open sea, a large amount of foam will be produced due to the drainage head. and have a negative impact on marine life,
Because it has a negative effect on the water intake pump of the vaporizer, a variable gauge is installed in the drainage channel 01 as shown in Figure 2.
02 is provided, and the head, that is, the water level L1 on the upstream side, is adjusted by this variable gate 02 to iA! Efforts have been made to prevent foaming. Adjustment of the variable gate 02 is performed by adjusting the water level L1 to the upstream water level detector 03 on the upstream side.
This is a feedback method in which the controller 04 calculates the opening degree of the variable gate 02 based on this information and adjusts the opening and closing of the variable gate 02.
しかし、この従来の制御方式においては次のような問題
があった。However, this conventional control method has the following problems.
ａ、上流水位Ｌ１はベーパティザ−の負荷変動により大
きく変り、この変動に追従しきれない。a. The upstream water level L1 changes greatly due to load fluctuations of the vaporizer, and cannot fully follow these fluctuations.
ｂ、 下流水位Ｌ２は潮位により周期的に変化すると共
に取水口が近くにあった場合この取水量により複雑な挙
動を示し、上流側の水位Ｌ１を検出しただけでは落差を
一定に保って泡立ちを防止することはできない。b. The downstream water level L2 changes periodically depending on the tide level, and if the water intake is nearby, it exhibits complicated behavior depending on the amount of water intake, and if only the upstream water level L1 is detected, it will not be possible to keep the head constant and prevent foaming. It cannot be prevented.
［本発明の目的］
本発明の目的は、排水路中に可変ゲートを設け、この可
変ゲートの開閉により上流水位を一定に保って落差によ
り生じる泡立ちを防止する排水装置において、上流側の
負荷変動、下流側の潮位変動、取水量変動等によって影
響を受けない前記可変ゲートの制御方式を採用した排水
装置を提案することである。[Object of the present invention] The object of the present invention is to provide a drainage system in which a variable gate is provided in a drainage channel, and the upstream water level is kept constant by opening and closing the variable gate to prevent foaming caused by head difference. Another object of the present invention is to propose a drainage system that employs the variable gate control method that is not affected by downstream tidal level fluctuations, water intake fluctuations, and the like.
［本発明の構成］
上記目的を達成するために提案される本発明の構成は次
のとおりである。[Configuration of the present invention] The configuration of the present invention proposed to achieve the above object is as follows.
上流側と下流側の間に可変ゲートを設け、この可変ゲー
トの開閉により上流側に流れ込む排水量を検出する排水
量検出器と、上流側水位を検出する上流水位検出器と、
下流側水位を検出する下流水位検出器とを設けると共に
上流水位検出器で検出された上流水位Ｈ１排水量検出器
で検出された排水φＱ、下流水位検出器で検出された下
流水位りから、目標上流水位比を保つための可変ゲート
開度ｄをｄ＝す（Ｑ、 Ｌ、 Ｈｓ）になるように演算
制御するコントローラーを設けて成る排水装置。A variable gate is provided between the upstream side and the downstream side, and a drainage amount detector that detects the amount of drainage flowing into the upstream side by opening and closing the variable gate, and an upstream water level detector that detects the upstream water level;
A downstream water level detector is provided to detect the downstream water level, and the upstream water level H1 detected by the upstream water level detector is determined from the drainage φQ detected by the drainage amount detector and the downstream water level detected by the downstream water level detector. A drainage device equipped with a controller that calculates and controls the variable gate opening degree d to maintain the water level ratio so that d=S(Q, L, Hs).
上記排水装置においては排水量が変化した場合、排水量
情報を先行して直ちにコントローラー内にとり入れて可
変ゲートの開度調整を行ない、上流水位の変化を抑える
。又、下流水位が変化した場合にもこの下流水位をコン
トローラーにとり入れて可変ゲートの開度調整を行なう
、なお、前記制御は所謂フィードフォワード制御である
が、この制御方式に用いられる最適開度演算が適用でき
ないような外乱に対応するため、上流水位を測定し、コ
ントローラーにおいて目標値からの偏差が一定値以上に
なると一時的にフィードフォワード制御に補正を加える
ようなフィードバック制御も行なうようになっている。In the above drainage system, when the amount of drainage changes, information on the amount of drainage is immediately taken into the controller in advance and the opening degree of the variable gate is adjusted to suppress changes in the upstream water level. Furthermore, even when the downstream water level changes, this downstream water level is incorporated into the controller to adjust the opening of the variable gate.The above control is so-called feedforward control, but the optimum opening calculation used in this control method In order to deal with disturbances that cannot be applied, the upstream water level is measured, and when the deviation from the target value exceeds a certain value, the controller performs feedback control that temporarily adds correction to the feedforward control. There is.
［実施例及びその作用］
第１図は上記本発明の一実施例を示し、ｌは排水路、２
は外海、３は排水路１と外海２との間の段差、４は前記
段差３の下流側に構築した堤壁にして、この堤壁４は底
部が開放５してあり、この開放５に可変ゲート６が取り
付けである。[Embodiment and its operation] FIG. 1 shows an embodiment of the present invention described above, where l is a drainage channel, and 2 is a drainage channel.
3 is the open sea, 3 is the step between the drainage channel 1 and the open sea 2, 4 is the embankment wall constructed on the downstream side of the step 3, and the bottom of this embankment wall 4 is open 5. The variable gate 6 is attached.
７．７ａは排水管にして、この排水管７．７ａには排水
量検出器８．８ａが取り付けである。7.7a is a drainage pipe, and a drainage amount detector 8.8a is attached to this drainage pipe 7.7a.
９は上流側の水位１０を検出するための上流水位検出器
、１１は下流側の水位１２を検出するための下流水位検
出器である。9 is an upstream water level detector for detecting the water level 10 on the upstream side, and 11 is a downstream water level detector for detecting the water level 12 on the downstream side.
１３４ｆ、コントローラーにして、このコントローラー
１３は次の計算式に基づいて前記可変ゲートの開度ｄを
調整することにより上流水位１０を目標値に制御する。134f is a controller, and this controller 13 controls the upstream water level 10 to a target value by adjusting the opening degree d of the variable gate based on the following calculation formula.
（１）通常時
ｄ＝子（Ｑ、 Ｌ、 Ｈｓ）
゛但し、Ｑ：排水量、 Ｌ：下流水位、Ｈｓ：目標上
流水位
（２）外乱による補正時
ｄ＝ ｆ（Ｑ、 Ｌ％ Ｈｓ）十す６（Ｑ、 Ｌ
、ΔＨ）但し、１Δ旧−ＩＨｓ−Ｈｌ＜よのときすＢ（
Ｑ、 Ｌ、ΔＨ）−〇とする。(1) Normal time d = child (Q, L, Hs) ゛ However, Q: Displacement amount, L: Downstream water level, Hs: Target upstream water level (2) When corrected due to disturbance d = f (Q, L% Hs) 6 (Q, L
, ΔH) However, 1Δold-IHs-Hl<yonotokisB(
Q, L, ΔH) - ○.
なお、可変ゲート６の開度はゲート算定式から求めてい
るが、しかしこのゲート算定式は理論的に求めるのは難
かしいため、実験運転時に得られたデータを統計的手法
により求めている。Note that the opening degree of the variable gate 6 is determined from a gate calculation formula, but since this gate calculation formula is difficult to determine theoretically, it is determined by a statistical method using data obtained during experimental operation.
なお、実施例の場合、可変ゲート６及びこの付近に海生
物が付着して作動に悪い影響を及ぼすので、一定期間ご
とに可変ゲート６は自動的に全開、全閉を行なっている
。In the case of the embodiment, the variable gate 6 is automatically fully opened and fully closed at regular intervals, since sea creatures may adhere to the variable gate 6 and its vicinity and have a negative effect on the operation.
［本発明の効果］
本発明は以上のように従来の上流水位を検出しながらフ
ィードバック方式で可変ゲートの開度を調整することに
より上流水位を目標値に制御する方式ではなく、排水量
、上流水位、下流水位を検出して可変ゲートの開度をコ
ントローラーにより制御するため、次の如き効果がある
。[Effects of the Present Invention] As described above, the present invention does not use the conventional method of controlling the upstream water level to a target value by adjusting the opening degree of a variable gate using a feedback method while detecting the upstream water level, but instead of controlling the upstream water level to a target value. Since the downstream water level is detected and the opening degree of the variable gate is controlled by the controller, the following effects are achieved.
ａ、排水量を検出し、この排水量を他に先行させてコン
トローラーにとり込んで演算を行ない、可変ゲートを制
御するため、例えばＬＮＧのベーパライザーの負荷変動
等に対して直ちに対応することができる。a. The amount of water discharged is detected, and the amount of water discharged is taken into the controller in advance of other things, and the calculation is performed to control the variable gate, so it is possible to immediately respond to changes in the load of an LNG vaporizer, etc., for example.
この結果、可変ゲートの追従が遅れて上流水位に大きな
変動が生じるという心配がない。As a result, there is no need to worry about large fluctuations in the upstream water level due to delays in tracking the variable gate.
ｂ、下流水位を検出しているため、潮位或いは取水量の
変動により下流水位が変化した場合に上流水位との間に
相対的な落差が生じていた問題を解決できる。b. Since the downstream water level is detected, it is possible to solve the problem of a relative head difference between the downstream water level and the upstream water level when the downstream water level changes due to fluctuations in tide level or water intake.
Ｃ０上流水位を検出し、フィードバック制御もとり入れ
た場合、外乱にも対応できる。If the C0 upstream water level is detected and feedback control is also incorporated, disturbances can be dealt with.
ｄ、 前記ａ−Ｃの効果により、いかなる条件において
も泡立ちの少ない排水が可能である。d. Due to the effects of a-C above, drainage with little foaming is possible under any conditions.
第１図は本発明に係る排水装置の説明図、第２図は従来
の排水装置の説明図である。
１・・・・・・排水路、 ２・・・・・・外海
、３・・・・・・段差、 ４・・・・・・堤
壁、５・・・・・・開口、 ６・・・・・・
可変ゲート、７．７ａ・・・排水管、 ８．８ａ
・・・排水量検出器、９・・・・・・主波水位検出器、
１０・・・上流水位、１１・・・下流水位検出器、１２
・・・下流水位、１３・・・コントローラー。
ＺFIG. 1 is an explanatory diagram of a drainage device according to the present invention, and FIG. 2 is an explanatory diagram of a conventional drainage device. 1... Drainage channel, 2... Open sea, 3... Step, 4... Embankment wall, 5... Opening, 6...・・・・・・
Variable gate, 7.7a...Drain pipe, 8.8a
...Drainage amount detector, 9...Main wave water level detector,
10...Upstream water level, 11...Downstream water level detector, 12
...downstream water level, 13...controller. Z
Claims (1)
トの開閉により上流側水位を一定に保つ排水装置におい
て、上流側に流れ込む排水量を検出する排水量検出器と
、上流側水位を検出する上流水位検出器と、下流側水位
を検出する下流水位検出器とを設けると共に上流水位検
出器で検出された上流水位Ｈ、排水量検出器で検出され
た排水量Ｑ、下流水位検出器で検出された下流水位Ｌか
ら、目標上流水位Ｈｓを保つための可変ゲート開度ｄを
ｄ＝ｆ（Ｑ、Ｌ、Ｈｓ）になるように演算制御するコン
トローラーを設けて成る排水装置。In a drainage system where a variable gate is provided between the upstream side and the downstream side, and the water level on the upstream side is kept constant by opening and closing the variable gate, there is a drainage amount detector that detects the amount of wastewater flowing into the upstream side, and an upstream sensor that detects the water level on the upstream side. A water level detector and a downstream water level detector for detecting the downstream water level are provided, and the upstream water level H detected by the upstream water level detector, the displacement amount Q detected by the drainage amount detector, and the downstream amount detected by the downstream water level detector are provided. A drainage system comprising a controller that calculates and controls a variable gate opening degree d for maintaining a target upstream water level Hs from a water level L so that d=f(Q, L, Hs).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22546286A JPS6383309A (en) | 1986-09-24 | 1986-09-24 | Drainage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22546286A JPS6383309A (en) | 1986-09-24 | 1986-09-24 | Drainage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6383309A true JPS6383309A (en) | 1988-04-14 |
Family
ID=16829709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22546286A Pending JPS6383309A (en) | 1986-09-24 | 1986-09-24 | Drainage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6383309A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012225049A (en) * | 2011-04-19 | 2012-11-15 | Ebara Corp | Flow control method and flow control device using gate |
| JP2021031913A (en) * | 2019-08-22 | 2021-03-01 | 株式会社クボタケミックス | Agricultural drainage device and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133389A (en) * | 1974-04-09 | 1975-10-22 | ||
| JPS5619808B2 (en) * | 1977-09-16 | 1981-05-09 |
-
1986
- 1986-09-24 JP JP22546286A patent/JPS6383309A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50133389A (en) * | 1974-04-09 | 1975-10-22 | ||
| JPS5619808B2 (en) * | 1977-09-16 | 1981-05-09 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012225049A (en) * | 2011-04-19 | 2012-11-15 | Ebara Corp | Flow control method and flow control device using gate |
| JP2021031913A (en) * | 2019-08-22 | 2021-03-01 | 株式会社クボタケミックス | Agricultural drainage device and control method thereof |
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