JPS6333434B2 - - Google Patents
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- Publication number
- JPS6333434B2 JPS6333434B2 JP1504684A JP1504684A JPS6333434B2 JP S6333434 B2 JPS6333434 B2 JP S6333434B2 JP 1504684 A JP1504684 A JP 1504684A JP 1504684 A JP1504684 A JP 1504684A JP S6333434 B2 JPS6333434 B2 JP S6333434B2
- Authority
- JP
- Japan
- Prior art keywords
- tower
- seawater
- steam
- decarboxylation
- deaeration
- 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
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- Degasification And Air Bubble Elimination (AREA)
- Physical Water Treatments (AREA)
Description
【発明の詳細な説明】
［発明の技術分野］
本発明は、海水淡水化装置へ供給する海水の脱
炭酸・脱気方法に係り、特に脱炭酸及び脱気処理
に必要とされる蒸気の使用量を減少させて省エネ
ルギ化を達成し、もつて造水単価の大幅な削減を
図ることができる海水の脱炭酸・脱気方法に関す
る。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a method for decarboxylation and deaeration of seawater supplied to a seawater desalination apparatus, and in particular to the use of steam required for decarboxylation and deaeration treatment. This invention relates to a method for decarboxylating and degassing seawater that can reduce the amount of water used, achieve energy savings, and significantly reduce the unit cost of water production.
［発明の技術的背景とその問題点］
一般に、海水淡水化装置へ供給される海水は、
装置内で炭酸塩のスケーリングが発生したり或い
は装置自体が醸化腐食することを防止するため
に、装置の前段にて予め脱炭酸処理と脱気処理と
がなされて含有CO2、O2が除去されている。[Technical background of the invention and its problems] Generally, seawater supplied to seawater desalination equipment is
In order to prevent scaling of carbonates from occurring within the equipment or fermentation corrosion of the equipment itself, decarboxylation and degassing are performed in advance of the equipment to eliminate the CO 2 and O 2 contained therein. has been removed.
従来の脱炭酸処理方法及び脱気処理方法を第１
図に基づいて説明すると、まず採取した海水１に
少量の硫酸２を混入して混合状態でこれを脱炭酸
塔３へ供給し、脱炭酸処理をしてCO2を追い出
す。次に、脱炭酸処理した海水を脱気塔４へ移送
し、減圧下にて脱気処理を行う。脱気塔４内を減
圧状態にするために、蒸気エジエクタ５が用いら
れており、これを通過した蒸気はアフターコンデ
ンサ（図示せず）にて凝縮されて廃棄される。 The conventional decarboxylation treatment method and deaeration treatment method are
To explain based on the figure, first, a small amount of sulfuric acid 2 is mixed into collected seawater 1, and the mixed state is supplied to the decarbonation tower 3, where it is decarboxylated and CO 2 is expelled. Next, the decarboxylated seawater is transferred to the degassing tower 4, where it is degassed under reduced pressure. A steam ejector 5 is used to reduce the pressure inside the degassing tower 4, and the steam passing through this is condensed in an after-condenser (not shown) and disposed of.
また、脱気塔４内へは連続的に或いは間欠的に
蒸気やベーパが供給されており、処理中の海水温
度を上昇させて良好な脱気効率を維持するように
なつている。そして、このようにして脱炭酸、脱
気処理された海水は次に図示されない海水淡水化
装置に向けて移送されることになる。 Further, steam and vapor are continuously or intermittently supplied into the degassing tower 4 to raise the temperature of the seawater during treatment and maintain good degassing efficiency. The seawater thus decarboxylated and degassed is then transferred to a seawater desalination apparatus (not shown).
ところで、この種従来方法にあつては、脱気塔
内を減圧するために蒸気エジエクタ５に通過させ
る蒸気と、脱気塔内の処理中の海水温度を昇温さ
せる熱源としての蒸気とがそれぞれ必要とされ、
それぞれ別個に発生させているのでエネルギ的に
大きなロスがあり、プラントの稼動費及び造水単
価の高騰を余儀なくされている。 By the way, in this type of conventional method, the steam passed through the steam ejector 5 to reduce the pressure inside the degassing tower and the steam serving as a heat source to raise the temperature of the seawater being processed in the degassing tower are each needed,
Since each of these is generated separately, there is a large energy loss, which forces the plant's operating costs and the unit price of water to rise.
これを防止するために、蒸気エジエクタ５にて
使用した蒸気をそのまま脱気塔４内へ供給して海
水の加熱源として使用することも考えられるが、
この場合には脱気したO2を塔外へ排出できなく
なり、この方法を採用することはできない。 In order to prevent this, it is possible to supply the steam used in the steam ejector 5 as it is into the degassing tower 4 and use it as a heating source for seawater.
In this case, the degassed O 2 cannot be discharged outside the column, and this method cannot be adopted.
本発明は以上のような問題点に着目しこれを有
効に解決すべく創案されたものである。 The present invention has been devised to address the above-mentioned problems and to effectively solve them.
［発明の目的］
本発明の目的は、海水淡水化装置へ供給する海
水の脱炭酸・脱気方法に係り、特に、脱炭酸及び
脱気処理に必要とされる蒸気の使用量を減少させ
て省エネルギ化を達成し、もつて造水単価の大幅
な削減を図ることができる海水淡水化装置へ供給
する海水の脱炭酸、脱気方法を提供するにある。[Object of the Invention] The object of the present invention relates to a method of decarboxylation and deaeration of seawater supplied to a seawater desalination apparatus, and in particular, a method for reducing the amount of steam used for decarboxylation and deaeration processing. An object of the present invention is to provide a method for decarboxylating and degassing seawater supplied to a seawater desalination device, which can achieve energy savings and significantly reduce the unit cost of water production.
［発明の概要］
本発明は、海水を脱炭酸塔で脱炭酸処理し、そ
の後この海水を、蒸気エジエクタにより減圧下に
維持された脱気塔へ移送して脱気するに際して、
上記脱炭酸塔内の海水を、これに上記蒸気エジエ
クタから排出された蒸気を供給して脱炭酸処理し
つつ昇温し、次いで、昇温された脱炭酸処理済み
の上記海水を上記脱気塔へ移送して脱炭処理する
ようにし、もつて上記目的を達成するものであ
る。[Summary of the Invention] The present invention decarboxylates seawater in a decarboxylation tower, and then transfers the seawater to a deaeration tower maintained under reduced pressure by a steam ejector for deaeration.
The seawater in the decarboxylation tower is heated while being decarboxylated by supplying the steam discharged from the steam ejector to it, and then the heated and decarboxylated seawater is transferred to the degasification tower. The above purpose is achieved by transferring the carbon to a decarburizer and decarburizing it.
［発明の実施例］
以下に、本発明の好適一実施例を添付図面に基
づいて詳述する。[Embodiments of the Invention] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
第２図は本発明方法を実施するための脱炭酸・
脱気装置を示す概略平面図である。 Figure 2 shows decarboxylation and
It is a schematic plan view showing a deaerator.
図示する如くこの脱炭酸・脱気装置は筒体状の
脱炭酸塔３と脱気塔４とを有しており、それぞれ
の塔内にはラシヒリング等が充填された充填層
６，７が設けられている。 As shown in the figure, this decarboxylation/deaeration device has a cylindrical decarboxylation tower 3 and a deaeration tower 4, and packed beds 6 and 7 filled with Raschig rings, etc. are provided in each tower. It is being
脱炭酸塔３内の充填層６の上部にはこれに海水
を供給するノズル８が設けられると共に、この塔
の上部には脱炭酸されたCO2及び脱気塔４側より
移送されてくる脱気O2を塔外へ排出するための
ガス排出口９が設けられている。 A nozzle 8 is provided at the top of the packed bed 6 in the decarboxylation tower 3 to supply seawater to the packed bed 6, and at the top of this tower, decarboxylated CO 2 and decarbonized CO 2 transferred from the degassing tower 4 side are installed. A gas outlet 9 is provided for discharging gas O 2 to the outside of the tower.
また脱炭酸塔３の下部には、塔内の脱気ガスの
排出を促進すべくこの中へ空気を圧送供給するた
めのエアーブロワ１０が接続されている。 Further, an air blower 10 is connected to the lower part of the decarbonation tower 3 for supplying air under pressure into the tower in order to promote discharge of the degassed gas inside the tower.
一方、前記脱気塔４内の充填層７の上部には脱
炭酸処理済みの海水をこれに供給するためのノズ
ル１１が設けられており、このノズル１１に一端
が前記脱炭酸塔３の下端部に連結された海水移送
通路１２が接続されている。 On the other hand, a nozzle 11 for supplying decarbonated seawater to the packed bed 7 in the deaeration tower 4 is provided, and one end of the nozzle 11 is connected to the lower end of the decarboxylation tower 3 A seawater transfer passage 12 connected to the section is connected.
また、脱気塔４の上部は通路１３を介して蒸気
エジエクタ５に接続されており、このエジエクタ
５内に加圧蒸気を流通させることにより脱気塔４
内の雰囲気を真空吸引して上記脱気塔４内を常時
減圧下に維持するようになつている。 Further, the upper part of the degassing tower 4 is connected to a steam ejector 5 through a passage 13, and by circulating pressurized steam through the ejector 5, the degassing tower
The inside of the degassing tower 4 is constantly maintained under reduced pressure by vacuum suctioning the atmosphere inside.
そして、この蒸気エジエクタ５の蒸気排出口１
４には排出蒸気を前記脱炭酸塔３へ向けて移送す
るための蒸気通路１５が接続されると共にこの通
路１５の先端は脱炭酸塔３内へ貫通挿入されてノ
ズル１６が接続されている。 And the steam outlet 1 of this steam ejector 5
4 is connected to a steam passage 15 for transferring exhaust steam toward the decarboxylation tower 3, and the tip of this passage 15 is penetrated into the decarboxylation tower 3 and connected to a nozzle 16.
特に、ノズル１６は脱炭酸塔３内の底部に位置
されており、この底部に貯留する脱炭酸処理済み
の海水或いは塔内を流下してくる海水を加熱昇温
するようになつている。 In particular, the nozzle 16 is located at the bottom of the decarbonation tower 3, and is designed to heat and raise the temperature of the decarbonated seawater stored at the bottom or the seawater flowing down the tower.
一方、前記脱気塔４の底部に貯留する脱炭酸・
脱気処理された海水を図示しない海水淡水化装置
へ供給するための移送通路１７が接続されてい
る。 On the other hand, the decarboxylation gas stored at the bottom of the degassing tower 4
A transfer passage 17 for supplying deaerated seawater to a seawater desalination apparatus (not shown) is connected.
次に、以上のように構成された装置例に基づい
て、本発明方法を具体的に説明する。 Next, the method of the present invention will be specifically explained based on an example of the apparatus configured as described above.
まず、採取された海水１に、この脱炭酸を促進
させるために適量の強酸たる硫酸２を添加混入し
てこれを脱炭酸塔３内のノズル８から塔内に供給
する。 First, an appropriate amount of sulfuric acid 2, which is a strong acid, is added and mixed into the collected seawater 1 to promote decarboxylation, and this is supplied into the decarboxylation tower 3 through a nozzle 8 inside the tower.
充填層６を流下する海水中からこれに溶存して
いたCO2が放出して脱炭酸処理がなされ、この脱
炭酸処理済みの海水は脱炭酸塔３の底部から抜き
出されて海水移送通路１２を介して更に脱気塔４
へ向けて移送される。そして、この海水は脱気塔
４内へノズル１１から噴霧されて、充填層７を流
下しつつ減圧下にて溶存O2を放出して脱気処理
がなされる。 CO 2 dissolved in the seawater flowing down the packed bed 6 is released and decarboxylated, and this decarboxylated seawater is extracted from the bottom of the decarboxylation tower 3 and transferred to the seawater transfer passage 12. Further through the degassing tower 4
will be transported towards. Then, this seawater is sprayed from the nozzle 11 into the deaeration tower 4, and is degassed by releasing dissolved O 2 under reduced pressure while flowing down the packed bed 7.
このようにして、脱炭酸処理及び脱炭処理がな
された海水は脱気塔４の底部から抜き出され、移
送通路１７を介して海水淡水化装置（図示せず）
へ移送供給される。 In this way, the decarboxylated and decarburized seawater is extracted from the bottom of the degassing tower 4 and sent to the seawater desalination equipment (not shown) via the transfer passage 17.
Transported and supplied to.
一方、脱気塔４内と通路１３を介して接続され
る蒸気エジエクタ５には、常時加圧蒸気が流通さ
れており、脱気塔内雰囲気を吸引することにより
前記の如くこの塔内を常時減圧下に維持して脱気
の促進を図つている。 On the other hand, pressurized steam is constantly flowing through the steam ejector 5, which is connected to the inside of the degassing tower 4 via the passage 13, and by sucking the atmosphere inside the degassing tower, the interior of the degassing tower is constantly maintained as described above. It is maintained under reduced pressure to promote degassing.
上記蒸気エジエクタ５を通過した排出蒸気は脱
気O2を随伴して蒸気通路１５を介して脱炭酸塔
３内の底部へ導入される。 The exhaust steam that has passed through the steam ejector 5 is introduced into the bottom of the decarbonation tower 3 via the steam passage 15, accompanied by degassed O 2 .
この導入蒸気は、塔内底部に貯留する海水と直
接接触してこれを加熱したり或いは塔内を上昇し
て流下してくる海水と接触してこれを加熱したり
し、自らは凝縮して最終的に脱炭酸塔３内の底部
に貯留する海水を昇温する。 This introduced steam either comes into direct contact with the seawater stored at the bottom of the tower and heats it, or comes into contact with the seawater that rises inside the tower and heats it, and then condenses itself. Finally, the temperature of the seawater stored at the bottom of the decarboxylation tower 3 is raised.
従つて、前述の如くこの塔内底部に貯留する海
水は昇温された状態で脱気塔４へ移送供給される
ことになる。 Therefore, as described above, the seawater stored at the bottom of the tower is transferred and supplied to the degassing tower 4 in a heated state.
また、排出蒸気に随伴してきた脱気O2はこの
塔内を上昇して脱炭酸CO2とともにガス排出口９
から塔外へ排出されることになる。 In addition, the degassed O 2 accompanying the exhaust steam rises inside this tower and reaches the gas outlet 9 along with the decarbonated CO 2 .
It will be discharged from the tower.
このように、本発明方法によれば、脱気塔４内
を減圧状態に維持するために使用した蒸気を廃棄
することなく脱炭酸塔３内へ導入し、この廃熱を
利用して脱気処理前の海水を昇温するための加熱
源として有効利用するようにしたので、従来例の
如く海水昇温用の蒸気或るいはベーパを別途発生
させる必要がなく加熱エネルギを大幅に削減する
ことができる。 As described above, according to the method of the present invention, the steam used to maintain the inside of the deaeration tower 4 in a reduced pressure state is introduced into the decarboxylation tower 3 without being disposed of, and the waste heat is used to perform deaeration. Since it is effectively used as a heating source to raise the temperature of seawater before treatment, there is no need to separately generate steam or vapor to raise the temperature of seawater as in the conventional case, and heating energy can be significantly reduced. Can be done.
また、従来例にあつては、脱気塔４内へ蒸気等
を供給して海水を加熱しつつ脱気処理したが、本
発明は脱気塔４内へ供給する海水を予め脱炭酸塔
３内の底部にて昇温して加熱された状態で脱気塔
４へ供給するようにしたので、海水が高温状態下
に存する時間が長くなり、その分だけ脱気処理を
より完全に行うことができる。 In addition, in the conventional example, the seawater was heated and degassed by supplying steam or the like into the deaeration tower 4, but in the present invention, the seawater to be supplied into the deaeration tower 4 was previously supplied to the decarboxylation tower 4. Since the temperature is raised at the bottom of the tank and the heated state is supplied to the degassing tower 4, the time that the seawater remains in the high temperature condition is longer, and the degassing process can be performed more completely by that amount. Can be done.
［発明の効果］
以上要するに、本発明方法によれば次のような
優れた効果を発揮することができる。[Effects of the Invention] In summary, according to the method of the present invention, the following excellent effects can be exhibited.
(1) 脱気塔内を減圧下に維持するために使用した
蒸気を海水の加熱源として廃熱を利用するよう
にしたので省エネルギ化に大幅に寄与すること
ができる。(1) Since the steam used to maintain the inside of the degassing tower under reduced pressure is used as a heating source for seawater, the waste heat can be used to significantly contribute to energy savings.
(2) 上述の如く海水の加熱と同時に蒸気が凝縮さ
れるので、従来必要とされた廃棄蒸気凝縮用の
アフターコンデンサを不要にでき、設備コスト
の低減化に役立つ。(2) As mentioned above, since the steam is condensed at the same time as the seawater is heated, the after-condenser for condensing waste steam that was conventionally required can be eliminated, which helps reduce equipment costs.
(3) また、新たな熱交換器等を必要とすることな
く海水を昇温させることができるので、既存の
装置に大幅な設計変更を加えることなく本発明
方法を容易に採用することができる。(3) Furthermore, since seawater can be heated without the need for a new heat exchanger, the method of the present invention can be easily adopted without making major design changes to existing equipment. .
(4) 前記した理由により、造水単価を大幅に削減
することができる。(4) For the reasons mentioned above, the unit cost of desalination can be significantly reduced.
第１図は従来の脱炭酸・脱気装置を示す概略平
面図、第２図は本発明方法を実施するための脱炭
酸・脱気装置を示す概略平面図である。
尚、図中、１は海水、３は脱炭酸塔、４は脱気
塔、５は蒸気エジエクタ、１５は蒸気通路であ
る。
FIG. 1 is a schematic plan view showing a conventional decarboxylation/deaeration device, and FIG. 2 is a schematic plan view showing a decarboxylation/deaeration device for carrying out the method of the present invention. In the figure, 1 is seawater, 3 is a decarbonation tower, 4 is a deaeration tower, 5 is a steam ejector, and 15 is a steam passage.
Claims (1)
脱炭酸処理し、その後、脱炭酸処理された海水
を、蒸気エジエクタにより減圧下に維持された脱
気塔へ移送して脱気するに際して、上記脱炭酸塔
内の海水を、これに上記蒸気エジエクタから排出
された蒸気を供給して脱炭酸処理しつつ昇温し、
次いで、昇温された脱炭酸処理済みの上記海水を
上記脱気塔へ移送して脱気処理するようにしたこ
とを特徴とする海水淡水化装置へ供給する海水の
脱炭酸・脱気方法。1. When the seawater supplied to the seawater desalination equipment is decarboxylated in a decarboxylation tower, and then the decarboxylated seawater is transferred to a deaeration tower maintained under reduced pressure by a steam ejector for deaeration, The seawater in the decarboxylation tower is heated while being decarboxylated by supplying the steam discharged from the steam ejector to it,
A method for decarboxylation and deaeration of seawater supplied to a seawater desalination apparatus, characterized in that the decarboxylated and heated seawater is then transferred to the deaeration tower for deaeration treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1504684A JPS60161787A (en) | 1984-02-01 | 1984-02-01 | Decarboxylation and deaeration method of seawater supplied to seawater desalination equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1504684A JPS60161787A (en) | 1984-02-01 | 1984-02-01 | Decarboxylation and deaeration method of seawater supplied to seawater desalination equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60161787A JPS60161787A (en) | 1985-08-23 |
| JPS6333434B2 true JPS6333434B2 (en) | 1988-07-05 |
Family
ID=11877887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1504684A Granted JPS60161787A (en) | 1984-02-01 | 1984-02-01 | Decarboxylation and deaeration method of seawater supplied to seawater desalination equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60161787A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11681414B2 (en) | 2019-11-12 | 2023-06-20 | CELSYS, Inc. | Command display control method, computer-readable medium and apparatus |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015051012A (en) * | 2014-10-16 | 2015-03-19 | 健 秋元 | Ocean acidification prevention |
| JP7538489B2 (en) * | 2019-11-01 | 2024-08-22 | 国立大学法人静岡大学 | Magnesium recovery method and magnesium recovery device |
| CN111579348A (en) * | 2020-05-12 | 2020-08-25 | 南京华天科技发展股份有限公司 | Liquid degassing method and degassing conductance device and system |
-
1984
- 1984-02-01 JP JP1504684A patent/JPS60161787A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11681414B2 (en) | 2019-11-12 | 2023-06-20 | CELSYS, Inc. | Command display control method, computer-readable medium and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60161787A (en) | 1985-08-23 |
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