JP2000061203A - Waste liquid distillation apparatus - Google Patents
Waste liquid distillation apparatusInfo
- Publication number
- JP2000061203A JP2000061203A JP10238595A JP23859598A JP2000061203A JP 2000061203 A JP2000061203 A JP 2000061203A JP 10238595 A JP10238595 A JP 10238595A JP 23859598 A JP23859598 A JP 23859598A JP 2000061203 A JP2000061203 A JP 2000061203A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- foam
- distilled
- heater
- distillation
- 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.)
- Withdrawn
Links
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、発泡性の廃液を蒸
留処理する廃液蒸留装置に関し、詳しくは、蒸留の際の
泡の発生をコントロールしてキャリオーバーを防止する
ようにした廃液蒸留装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste liquid distillation apparatus for distilling a foamable waste liquid, and more particularly to a waste liquid distillation apparatus for controlling the generation of bubbles during distillation to prevent carryover. It is a thing.
【０００２】[0002]
【従来の技術】発泡性廃液の処理方法として、図３に示
すように、蒸留容器１に入れられた発泡性廃液の被蒸留
液４を加熱ヒータ５により加熱して沸騰させ、発生した
蒸気を蒸気取出口２から取り出し、冷却してクリーンな
蒸留水と濃縮液とに分離させる方法が知られている。被
蒸留液４の沸騰により、図３（ａ）に示すように、蒸気
は発泡性の廃液である被蒸留液４から出ていくが、その
蒸気流速により泡１６が発生し、これが蒸気流に随伴し
ていき、蒸留容器１の蒸気取出口２から溢れる、いわゆ
るキャリオーバーという現象が起こる。2. Description of the Related Art As a method for treating a foaming waste liquid, as shown in FIG. 3, a distilling liquid 4 of the foaming waste liquid contained in a distillation vessel 1 is heated by a heater 5 to boil the generated vapor. A method is known in which it is taken out from the steam outlet 2 and cooled to separate it into clean distilled water and concentrated liquid. As shown in FIG. 3 (a), the boiling of the liquid to be distilled 4 causes the vapor to exit from the liquid to be distilled 4, which is a foaming waste liquid, but bubbles 16 are generated due to the flow velocity of the vapor, which forms a vapor flow. Accompanying this, a phenomenon called so-called carryover occurs, which overflows from the vapor outlet 2 of the distillation container 1.
【０００３】従来は、このキャリオーバーの防止対策と
して、蒸気取出口２にワイヤメッシュデミスタ３を設け
ている。これにより、蒸気中に随伴してきた泡の液滴は
ワイヤメッシュデミスタ３に衝突して分離され、クリー
ンな蒸気のみを排出するようにしている。Conventionally, a wire mesh demister 3 is provided at the steam outlet 2 as a measure for preventing this carry-over. As a result, the droplets of bubbles entrained in the vapor collide with the wire mesh demister 3 and are separated, so that only clean vapor is discharged.
【０００４】[0004]
【発明が解決しようとする課題】上記のようなワイヤメ
ッシュデミスタ３による手段は、蒸気中に随伴する比較
的少ない泡には対処できるが、図３（ｂ）に示すように
発泡した泡が成長して層となって上昇してきた場合、ワ
イヤメッシュデミスタ３では対処しきれず、蒸気取出口
２から泡１６ａが溢れること、すなわち、キャリオーバ
ーを防止できなかった。発泡の予測が可能であれば、そ
の際ヒータ出力を低下させて沸騰の度合いを抑制するこ
とにより、泡の成長を抑制することが可能である。泡の
成長を抑制すると、蒸留能力は一時的に低下するもの
の、蒸留液の純度を保つことができる。The means using the wire mesh demister 3 as described above can deal with a relatively small amount of bubbles accompanying steam, but foamed bubbles grow as shown in FIG. 3 (b). Then, the wire mesh demister 3 cannot cope with the situation and the bubbles 16a overflow from the steam outlet 2, that is, carry-over cannot be prevented. If foaming can be predicted, it is possible to suppress the growth of bubbles by reducing the heater output and suppressing the degree of boiling at that time. When the growth of bubbles is suppressed, the distillation capacity is temporarily lowered, but the purity of the distillate can be maintained.
【０００５】泡の成長要因は数多くあるが、そのうちの
１つとして被蒸留液４の濃度が挙げられる。ところが、
最も発泡しやすい濃度は不明であるため、濃度から発泡
を予測することは困難である。したがって、従来は泡の
発生の予測もしくは検知をする手段がなく、キャリオー
バーを完全に防止することができなかった。このキャリ
オーバーを防止できないと、蒸留性能が維持できなくな
るため、加熱ヒータ４を出力低下もしくは休止させてキ
ャリオーバーがなくなるまで待っていた。There are many factors for bubble growth, and one of them is the concentration of the liquid to be distilled 4. However,
Since the concentration at which foaming is most likely to occur is unknown, it is difficult to predict foaming from the concentration. Therefore, conventionally, there is no means for predicting or detecting the occurrence of bubbles, and carryover cannot be completely prevented. If this carry-over cannot be prevented, the distillation performance cannot be maintained. Therefore, the heating heater 4 is lowered in output or stopped to wait until the carry-over disappears.
【０００６】本発明は、このような問題に鑑みてなされ
たものであって、その目的とするところは、特に、泡発
生の初期を検知し、その検知信号に基づいてヒータ出力
を制御することにより、キャリオーバーを防止し、連続
して蒸留性能を維持できるようにした廃液蒸留装置を提
供することにある。The present invention has been made in view of such a problem, and its object is to detect the initial stage of bubble generation and control the heater output based on the detected signal. Accordingly, it is an object of the present invention to provide a waste liquid distillation apparatus capable of preventing carryover and continuously maintaining distillation performance.
【０００７】[0007]
【課題を解決するための手段】前記の目的を達成するべ
く、本発明は、蒸留容器に入れられた被蒸留液を加熱ヒ
ータで沸騰させて蒸留処理する廃液蒸留装置において、
前記被蒸留液の液面上方に位置するように前記蒸留容器
内に配置された泡検知器を備え、前記被蒸留液から発生
する泡を前記泡検知器で検知し、この検知信号に基づい
て前記加熱ヒータの出力を低下させて前記泡を抑制する
ようにしたことを特徴とする。In order to achieve the above object, the present invention provides a waste liquid distilling apparatus for distilling a liquid to be distilled put in a distilling vessel with a heater to distill the liquid.
A bubble detector disposed in the distillation container so as to be located above the liquid surface of the liquid to be distilled is provided, and bubbles generated from the liquid to be distilled are detected by the bubble detector, and based on this detection signal. The output of the heater is reduced to suppress the bubbles.
【０００８】前記泡検知器は、相対向する部分を有する
絶縁性の張膜フレームと、前記相対向する部分の各々に
設けた電極とを備え、該張膜フレームに泡の膜が張られ
たときこの膜により前記電極間が電気的に導通するよう
になっている。また、前記張膜フレームは、環状の形状
をなし、その一部が切欠されて開放部となっており、か
つ前記電極を挟んで前記開放部と反対側の部分には撥水
カバーが設けられている。The bubble detector includes an insulating tension film frame having opposing portions, and electrodes provided on each of the opposing portions, and a bubble film is stretched on the tension film frame. At this time, the film electrically connects the electrodes. Further, the tension film frame has an annular shape, a part of which is cut away to form an open portion, and a water repellent cover is provided on a portion opposite to the open portion with the electrode interposed therebetween. ing.
【０００９】加熱ヒータにより被蒸留液を加熱すると、
被蒸留液が沸騰し始めた時点において泡が発生し、この
発泡初期の泡が泡検知器に接触すると、張膜フレームに
泡の膜が張られ、これにより電極間が導通する。この導
通による電流の変化に基づいて加熱ヒータの出力を低下
させ、発泡を抑制する。本発明では、発泡が成長して層
となる前の初期の段階の泡が検知でき、この検知信号に
基づいて加熱ヒータの出力を低下させて泡を抑制するこ
とが可能となるため、泡の成長を常時適正に抑制でき、
発泡によるキャリオーバーが防止でき、連続して蒸留性
能を維持できる。When the liquid to be distilled is heated by the heater,
When the liquid to be distilled begins to boil, bubbles are generated, and when the bubbles in the initial stage of foaming contact the bubble detector, a film of bubbles is stretched on the tension film frame, thereby establishing electrical continuity between the electrodes. The output of the heater is reduced based on the change in current due to this conduction, and foaming is suppressed. In the present invention, it is possible to detect the bubbles in the initial stage before the bubbles grow and become a layer, and it is possible to reduce the output of the heating heater based on the detection signal and suppress the bubbles. You can always suppress growth properly,
Carryover due to foaming can be prevented, and distillation performance can be maintained continuously.
【００１０】[0010]
【発明の実施の形態】以下に図面を参照して本発明の実
施の形態を例示的に説明する。ただし、この実施の形態
に記載されている構造部品の寸法、材質、形状、相対位
置などは特に特定的な記載がない限りは、この発明の範
囲をそれのみに限定する趣旨ではなく、単なる説明例に
過ぎない。なお、図３と同一部材または同一機能のもの
は同一符号で示している。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be exemplarily described below with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc., of the structural parts described in this embodiment are not intended to limit the scope of the present invention thereto, unless there is a specific description, and are simply described. It's just an example. The same members or functions as those in FIG. 3 are designated by the same reference numerals.
【００１１】図１において、１は従来と同様の蒸留容器
であって、蒸気取出口２にはワイヤメッシュデミスタ３
が取り付けられている。蒸留容器１内には発泡性廃液で
ある被蒸留液４が入れられている。蒸留容器１の下部に
は被蒸留液４を加熱する加熱ヒータ５が配置されてい
る。前記被蒸留液４の液面の上方には泡検知器６が配置
されている。前記泡検知器６は、図２に示すように、樹
脂等の絶縁材からなる環状の張膜フレーム７と、該張膜
フレーム７の相対向する箇所に設けられた電極８、８か
らなる。この電極８、８には導線１２が接続されてい
る。該導線１２は電流モニタ（図１参照）１３に接続さ
れている。In FIG. 1, reference numeral 1 denotes a distillation container similar to the conventional one, and a wire mesh demister 3 is provided at a steam outlet 2.
Is attached. A distillation target liquid 4, which is a foaming waste liquid, is placed in the distillation container 1. A heater 5 for heating the liquid to be distilled 4 is arranged below the distillation container 1. A bubble detector 6 is arranged above the liquid surface of the liquid to be distilled 4. As shown in FIG. 2, the bubble detector 6 is composed of an annular tension film frame 7 made of an insulating material such as resin, and electrodes 8, 8 provided at opposite positions of the tension film frame 7. A conductive wire 12 is connected to the electrodes 8, 8. The conductor 12 is connected to a current monitor (see FIG. 1) 13.
【００１２】張膜フレーム７には、一部を切欠いて開放
部１１を形成している。また、張膜フレーム７には、前
記電極８、８を挟んで開放部１１と相対向する側の部分
に、水分をはじく撥水カバー９が取り付けられ、この撥
水カバー９に取付片１０が設けられている。An opening 11 is formed in the tension film frame 7 by cutting out a part thereof. Further, a water repellent cover 9 that repels moisture is attached to a portion of the tension film frame 7 opposite to the open portion 11 with the electrodes 8 interposed therebetween, and the attachment piece 10 is attached to the water repellent cover 9. It is provided.
【００１３】次に、かかる実施形態の動作を説明する。
加熱ヒータ５による加熱により被蒸留液４を加熱する
と、被蒸留液４が沸騰し始めた時点で泡１６が発生し、
蒸留により被蒸留液４がある程度濃縮した時点におい
て、泡１６の成長が著しく増加してくる。沸騰し始めた
最初は大きな泡が発生し、これが小さく***して発泡し
ていくが、本発明では、発泡初期の段階で泡１６が泡検
知器６に接触して、張膜フレーム７内に泡の膜１５が張
られ、これにより、電極８、８間の電気抵抗が低下して
導線１２に電流が流れる。この電流の変化を電流モニタ
１３で検出して、その信号をヒータ制御回路１４に送
り、加熱ヒータ５の出力を低下（出力が０の場合も含
む）させる。加熱ヒータ５の出力を低下させると、熱負
荷が下がり、発泡が抑制される。Next, the operation of this embodiment will be described.
When the liquid to be distilled 4 is heated by the heating by the heater 5, bubbles 16 are generated when the liquid to be distilled 4 starts to boil,
When the liquid to be distilled 4 is concentrated to some extent by distillation, the growth of the bubbles 16 remarkably increases. At the beginning of boiling, a large bubble is generated, which is divided into small bubbles and foams. In the present invention, the bubble 16 comes into contact with the bubble detector 6 in the initial stage of foaming, and the bubble 16 stays in the tension film frame 7. The bubble film 15 is stretched, whereby the electric resistance between the electrodes 8 and 8 is reduced and a current flows through the conductive wire 12. This change in current is detected by the current monitor 13, and the signal is sent to the heater control circuit 14 to reduce the output of the heater 5 (including the case where the output is 0). When the output of the heater 5 is reduced, the heat load is reduced and foaming is suppressed.
【００１４】泡が少なくなり、泡検知器６の膜１５が消
えると、電極８、８間の電気抵抗が増大して泡検知器６
の導通がなくなり、電流モニタ１３からの信号で加熱ヒ
ータ５の出力が増大して蒸留処理を行なう。張膜フレー
ム７に開放部１１及び撥水カバー９を設けているので、
張膜フレーム７が濡れた状態（泡はない状態）でこの水
分を介して電極８、８間が導通するという誤作動を回避
できる。なお、開放部１１と撥水カバー９はいずれか一
方のみでもよいが、両方設けることにより確実に誤作動
を回避できる。When the amount of bubbles decreases and the film 15 of the bubble detector 6 disappears, the electrical resistance between the electrodes 8 increases and the bubble detector 6
Is no longer conducted, and the output of the heater 5 is increased by the signal from the current monitor 13 to perform the distillation process. Since the opening portion 11 and the water repellent cover 9 are provided on the stretch film frame 7,
It is possible to avoid an erroneous operation in which the electrodes 8 are electrically connected via the moisture when the tension film frame 7 is wet (there is no bubble). Although only one of the open part 11 and the water repellent cover 9 may be provided, provision of both of them can surely avoid malfunction.
【００１５】上記実施の形態では、張膜フレーム７を円
環状に構成した例を示しているが、膜１５が張られる形
状であり、かつ少なくとも一対の相対向する部分（電極
８を設ける部分）を有していれば、例えば、Ｕ字形、Ｃ
字形等、任意の形状であってもよい。In the above-described embodiment, an example in which the tension film frame 7 is formed in an annular shape is shown, but the shape is such that the membrane 15 is stretched and at least a pair of opposing portions (portions where the electrodes 8 are provided). If, for example, U-shaped, C
It may have any shape such as a letter shape.
【００１６】[0016]
【発明の効果】以上、詳述したように、本発明によれ
ば、被蒸留液の液面上方に位置するように泡検知器を配
置したので、発泡成長して層となる前の初期の段階の泡
が検知でき、この検知信号に基づいて加熱ヒータの出力
を低下させて泡を抑制することが可能となり、泡の成長
を常時適正に抑制でき、発泡によるキャリオーバーが防
止できる。したがって、キャリオーバーによる蒸留性能
の低下現象をなくすることができ、連続して高性能の蒸
留処理が可能となる。As described above in detail, according to the present invention, the bubble detector is arranged so as to be located above the liquid surface of the liquid to be distilled. Bubbles in stages can be detected, and the output of the heater can be reduced based on this detection signal to suppress bubbles, the growth of bubbles can always be appropriately suppressed, and carryover due to foaming can be prevented. Therefore, it is possible to eliminate the deterioration phenomenon of distillation performance due to carryover, and it is possible to continuously perform high-performance distillation treatment.
【図１】 本発明の廃液蒸留装置の実施の形態を示す説
明図である。FIG. 1 is an explanatory diagram showing an embodiment of a waste liquid distillation apparatus of the present invention.
【図２】 泡検知器の斜視図である。FIG. 2 is a perspective view of a bubble detector.
【図３】 従来の廃液蒸留装置の説明図であって、
（ａ）は発泡成長前、（ｂ）は発泡成長後を示す。FIG. 3 is an explanatory view of a conventional waste liquid distillation apparatus,
(A) shows before foaming growth, (b) shows after foaming growth.
１ 蒸留容器 ４ 被蒸留液 ５ 加熱ヒータ ６ 泡検知器 ７ 張膜フレーム ８ 電極 ９ 撥水カバー １１ 開放部 １３ 電流モニタ １４ ヒータ制御回路 １６ 泡 1 distillation container 4 Distilled liquid 5 heater 6 Bubble detector 7 tension film frame 8 electrodes 9 Water repellent cover 11 Open section 13 Current monitor 14 Heater control circuit 16 bubbles
Claims (3)
ータで沸騰させて蒸留処理する廃液蒸留装置において、 前記被蒸留液の液面上方に位置するように前記蒸留容器
内に配置された泡検知器を備え、前記被蒸留液から発生
する泡を前記泡検知器で検知し、この検知信号に基づい
て前記加熱ヒータの出力を低下させて前記泡を抑制する
ように構成したことを特徴とする廃液蒸留装置。1. A waste liquid distillation apparatus in which a liquid to be distilled contained in a distillation container is boiled by a heater to carry out a distillation process, the device being disposed in the distillation container so as to be located above the liquid surface of the liquid to be distilled. A foam detector is provided, and the foam generated from the liquid to be distilled is detected by the foam detector, and the output of the heating heater is reduced based on the detection signal to suppress the foam. Waste liquid distillation equipment to be.
る絶縁性の張膜フレームと、前記相対向する部分の各々
に設けた電極とを備え、該張膜フレームに泡の膜が張ら
れたときこの膜により前記電極間が電気的に導通するよ
うに構成されていることを特徴とする請求項１記載の廃
液蒸留装置。2. The bubble detector comprises an insulating tension film frame having opposing portions, and electrodes provided on each of the opposing portions, and a bubble film is attached to the tension film frame. The waste liquid distillation apparatus according to claim 1, wherein the film is configured to electrically connect between the electrodes when the waste liquid distillation apparatus is operated.
し、その一部が切欠されて開放部となっており、かつ前
記電極を挟んで前記開放部と反対側の部分には撥水カバ
ーが設けられていることを特徴とする請求項２記載の廃
液蒸留装置。3. The water-repellent cover is formed in the tension film frame in an annular shape, a part of which is cut away to form an open part, and a part opposite to the open part sandwiching the electrode. The waste liquid distillation apparatus according to claim 2, further comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10238595A JP2000061203A (en) | 1998-08-25 | 1998-08-25 | Waste liquid distillation apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10238595A JP2000061203A (en) | 1998-08-25 | 1998-08-25 | Waste liquid distillation apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000061203A true JP2000061203A (en) | 2000-02-29 |
Family
ID=17032538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10238595A Withdrawn JP2000061203A (en) | 1998-08-25 | 1998-08-25 | Waste liquid distillation apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000061203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008504952A (en) * | 2004-07-02 | 2008-02-21 | ピュリティ アーベー | Liquid cleaning device |
-
1998
- 1998-08-25 JP JP10238595A patent/JP2000061203A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008504952A (en) * | 2004-07-02 | 2008-02-21 | ピュリティ アーベー | Liquid cleaning device |
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