JPH0225673B2 - - Google Patents

Info

Publication number
JPH0225673B2
JPH0225673B2 JP14598983A JP14598983A JPH0225673B2 JP H0225673 B2 JPH0225673 B2 JP H0225673B2 JP 14598983 A JP14598983 A JP 14598983A JP 14598983 A JP14598983 A JP 14598983A JP H0225673 B2 JPH0225673 B2 JP H0225673B2
Authority
JP
Japan
Prior art keywords
splash
demister
steam
flash
folded
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
Application number
JP14598983A
Other languages
Japanese (ja)
Other versions
JPS6038081A (en
Inventor
Yoshuki Takeuchi
Masahiro Matsubayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP14598983A priority Critical patent/JPS6038081A/en
Publication of JPS6038081A publication Critical patent/JPS6038081A/en
Publication of JPH0225673B2 publication Critical patent/JPH0225673B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/06Flash distillation
    • B01D3/065Multiple-effect flash distillation (more than two traps)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明はフラツシユ蒸発型造水装置に関し、特
に該装置におけるスプラツシユの防止を図る技術
の改良に関する。 第1図は従来の多段フラツシユ蒸発型造水装置
の1部断面図を示す。 第1図において、1はオリフイス、2は堰、3
はフラツシユ室、4はワイヤメツシユ型のデミス
タ、5はコンデンサ室、6はトレイ、7はスプラ
ツシユ防止板、9は隔壁、10は底板、11は伝
熱管、12はオリフイス調整板を示す。しかし
て、オリフイス1より導入されたブラインは噴出
し、フラツシユ室3内にてフラツシユ蒸発し、蒸
発したフラツシユ蒸気(矢印)はデミスタ4を経
て、コンデンサ室5内にて凝縮されて淡水となり
トレイ6に集められ外部に取り出される。 しかし、上述した従来の多段フラツシユ蒸発型
造水装置では、ブラインがオリフイス1より噴出
した時に発生するスプラツシユ(飛散ミスト)が
フラツシユ蒸気流に同伴され、スプラツシユがデ
ミスタ4に到達してデミスタ4に付着し、デミス
タ4の蒸気流通効率を低下せしめるとともに、さ
らにコンデンサ室5にいたり、製造淡水の水質低
下をまねく等の欠点があつた。 そこで、従来はフラツシユ室3の段間絞りオリ
フイス1部とデミスタ4の間に、スプラツシユを
遮断するためのスプラツシユ防止板7を設けてこ
れらの不具合を解消するように図つていた。しか
し従来のスプラツシユ防止板7では、衝突したミ
ストの一部が再飛散して蒸気の流れに同伴され、
デミスタ4に到達することがありスプラツシユの
遮断がまだ十分に行なえず従来装置の不具合は依
然として残つていた。 本発明は、上述した従来装置の不具合を解消す
べく、スプラツシユ防止板に衝突し、その後再飛
散したスプラツシユを捕捉してその重力落下を促
がして、スプラツシユのデミスタへの付着および
コンデンサ室への混入を防止することを提案する
ものである。 以下、本発明を第2図ないし第5図に基づき説
明する。 第2図ないし第4図において、8は本発明の1
実施例である折板を示し、折板8はデミスタ4の
下部に相互に間隔をおいて平行に並設されてい
る。 なお、第2図中において第1図と同様の符号で
示すものは同じ構造であることを示し、折板8以
外は第1図のものと同様の装置である。 しかして、オリフイス1を通過して減圧された
フラツシユ室3内に流入した高温ブラインはフラ
ツシユ蒸発する。この時発生したスプラツシユ
は、高温段ほど激しく、約500〜1000μmの大粒
径の液滴がデミスタ4取付位置まで到達する。こ
のスプラツシユ量が多い場合、一旦デミスタ4に
捕捉されたスプラツシユ(液滴)が十分滴下回収
されずに再び蒸気に同伴されてコンデンサ室5に
持ち込まれ、その結果製造水の純度を低下させる
という好ましくない状態となる。 ところが、本発明の構造の場合、飛来したスプ
ラツシユは一旦折板8に衝突し、折板8壁面上で
凝集して更に大粒径の液滴となり、下方から上昇
する蒸気流れに打勝つてフラツシユ室3内下部の
蒸発液面へ自然落下する。 第2図に示すように、スプラツシユの発生はオ
リフイス1と堰2の間で大半が生じ、水平面とス
プラツシユの飛散方向とのなす角度αが約20〜90
度のものが一般にデミスタ4へ到達する。従つ
て、折板8が単に平板の場合には、平板間を通過
するスプラツシユが生じる。従つて、折板の角度
βは90度以下が好ましい。 また、隣接する折板8の間隔が広い場合には、
折板8の間隔をぬつて飛散するスプラツシユが生
じる。そこで、折板8の下端と折板8の凸部との
間隔d(第4図参照)は大きい方が良いが、あま
り大きすぎると折板8の枚数が多くなつてコスト
アツプとなり、更に折板8間を通過する蒸気の圧
損を大きくする不具合を生じる。 第1図及び第2図の構造の装置を使用して、本
発明の効果を確認した結果を第5図に示す。 (1) 実施条件 (a) ブライン温度 55℃ (b) 蒸気温度 52.2℃ (c) 圧力 0.14Kg/cm2A (d) デミスタ通過ガス流速 9.4m/S (2) 結果
TECHNICAL FIELD The present invention relates to a flash evaporation type freshwater generating device, and particularly to improvements in technology for preventing splash in the device. FIG. 1 shows a partial cross-sectional view of a conventional multi-stage flash evaporation type fresh water generator. In Figure 1, 1 is an orifice, 2 is a weir, and 3
4 is a flash chamber, 4 is a wire mesh type demister, 5 is a condenser chamber, 6 is a tray, 7 is a splash prevention plate, 9 is a partition wall, 10 is a bottom plate, 11 is a heat exchanger tube, and 12 is an orifice adjustment plate. As a result, the brine introduced from the orifice 1 is ejected and evaporated in the flash chamber 3, and the evaporated flash steam (arrow) passes through the demister 4, condenses in the condenser chamber 5, and becomes fresh water in the tray 6. is collected and taken out to the outside. However, in the above-mentioned conventional multi-stage flash evaporation fresh water generation system, the splash (splattered mist) generated when the brine is ejected from the orifice 1 is entrained in the flash vapor flow, and the splash reaches the demister 4 and adheres to the demister 4. However, there were drawbacks such as lowering the efficiency of steam distribution in the demister 4, and further causing the steam to flow into the condenser chamber 5, leading to a deterioration in the quality of the produced fresh water. Therefore, conventionally, a splash prevention plate 7 for blocking splash was provided between the interstage throttle orifice 1 of the flash chamber 3 and the demister 4 to solve these problems. However, with the conventional splash prevention plate 7, a part of the collided mist is re-splattered and entrained in the steam flow.
Since the splash may reach the demister 4, the splash cannot be blocked sufficiently, and the problem of the conventional device still remains. In order to solve the above-mentioned problems of the conventional device, the present invention captures the splash that collides with the splash prevention plate and is then re-splattered, and promotes its fall due to gravity, so that the splash adheres to the demister and flows into the condenser chamber. This is a proposal to prevent the contamination of Hereinafter, the present invention will be explained based on FIGS. 2 to 5. In FIGS. 2 to 4, 8 is 1 of the present invention.
The folded plates 8 are shown as an example, and the folded plates 8 are arranged parallel to each other at a distance from each other under the demister 4. In FIG. 2, the same reference numerals as in FIG. 1 indicate the same structure, and the device other than the folded plate 8 is the same as that in FIG. 1. The high-temperature brine that has passed through the orifice 1 and flowed into the depressurized flash chamber 3 flashes and evaporates. The splash generated at this time is more intense as the temperature increases, and large droplets of about 500 to 1000 μm reach the demister 4 mounting position. If the amount of this splash is large, the splash (droplets) once captured by the demister 4 will not be sufficiently dripped and collected and will be carried into the condenser chamber 5 again along with the steam, resulting in a decrease in the purity of the produced water. There will be no. However, in the case of the structure of the present invention, the flying splash once collides with the folded plate 8, aggregates on the wall surface of the folded plate 8, becomes even larger droplets, and overcomes the steam flow rising from below to form a splash. It naturally falls to the evaporated liquid level in the lower part of chamber 3. As shown in Figure 2, most of the splash occurs between the orifice 1 and the weir 2, and the angle α between the horizontal plane and the direction of the splash is about 20 to 90.
Generally, the demister 4 reaches the demister 4. Therefore, if the folded plates 8 are simply flat plates, a splash will occur that passes between the flat plates. Therefore, the angle β of the folded plate is preferably 90 degrees or less. In addition, when the distance between adjacent folded plates 8 is wide,
A splash is generated that passes through the space between the folded plates 8. Therefore, it is better to have a larger distance d (see Figure 4) between the lower end of the folded plate 8 and the convex part of the folded plate 8, but if it is too large, the number of folded plates 8 will increase, which will increase the cost, and furthermore. This causes a problem of increasing the pressure loss of the steam passing through the space. FIG. 5 shows the results of confirming the effects of the present invention using the apparatus having the structure shown in FIGS. 1 and 2. (1) Implementation conditions (a) Brine temperature 55℃ (b) Steam temperature 52.2℃ (c) Pressure 0.14Kg/cm 2 A (d) Gas flow rate through demister 9.4m/S (2) Results

【表】 上記表に示すように、本発明の装置により、デ
ミスタ通過後の蒸気中の重量平均ミスト粒径が減
小していることが明確であり、本発明の効果が確
認できた。 以上、実施例で説明したように、デミスタを有
するフラツシユ蒸発型造水装置において、デミス
タ下部に多数の折板を配置することにより、フラ
ツシユ蒸発で生じるスプラツシユの大半をデミス
タ通過蒸気中から分離除去でき、製造水品質を大
幅に向上することができる。 また、本発明の効果はコンデンサ室形状が丸型
の場合に特に大きい。
[Table] As shown in the above table, it is clear that the device of the present invention reduces the weight average mist particle size in the steam after passing through the demister, confirming the effect of the present invention. As explained in the examples above, in a flash evaporation type freshwater generation system having a demister, by arranging a large number of folded plates at the bottom of the demister, most of the splash generated by flash evaporation can be separated and removed from the steam passing through the demister. , the quality of produced water can be greatly improved. Moreover, the effect of the present invention is particularly great when the shape of the condenser chamber is round.

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

第1図は丸型形状のコンデンサ室を有する従来
の造水装置の1部断面図、第2図は本発明を説明
する断面図、第3図は折板の斜視図、第4図は折
板の正面図、第5図は従来と本発明の装置を使用
した運転の実施例に基づくスプラツシユ粒径のグ
ラフである。 3:フラツシユ室、9:隔壁、2:堰、10:
底板、4:デミスタ、1:オリフイス、8:折
板。
Fig. 1 is a partial cross-sectional view of a conventional water generator having a round-shaped condenser chamber, Fig. 2 is a cross-sectional view explaining the present invention, Fig. 3 is a perspective view of a folded plate, and Fig. 4 is a folded plate. FIG. 5, a front view of the plate, is a graph of splash particle size based on examples of operation using conventional and inventive apparatus. 3: Flash chamber, 9: Bulkhead, 2: Weir, 10:
Bottom plate, 4: demister, 1: orifice, 8: folded plate.

Claims (1)

【特許請求の範囲】[Claims] 1 フラツシユ蒸発型造水装置のフラツシユ室と
コンデンサ室とを連通する蒸気流路に設けたデミ
スタの下部に、多数の折板を相互に間隔をおいて
平行に並設したことを特徴とするフラツシユ蒸発
型造水装置。
1. A flash evaporation type freshwater generator, characterized in that a large number of folded plates are arranged in parallel at intervals at the lower part of a demister provided in a steam flow path that communicates a flash chamber and a condenser room. Evaporative water generator.
JP14598983A 1983-08-10 1983-08-10 Flash evaporation type water distilling apparatus Granted JPS6038081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14598983A JPS6038081A (en) 1983-08-10 1983-08-10 Flash evaporation type water distilling apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14598983A JPS6038081A (en) 1983-08-10 1983-08-10 Flash evaporation type water distilling apparatus

Publications (2)

Publication Number Publication Date
JPS6038081A JPS6038081A (en) 1985-02-27
JPH0225673B2 true JPH0225673B2 (en) 1990-06-05

Family

ID=15397602

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14598983A Granted JPS6038081A (en) 1983-08-10 1983-08-10 Flash evaporation type water distilling apparatus

Country Status (1)

Country Link
JP (1) JPS6038081A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61150001U (en) * 1985-03-06 1986-09-17
JPS6364031U (en) * 1986-10-16 1988-04-27

Also Published As

Publication number Publication date
JPS6038081A (en) 1985-02-27

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