JP4011845B2 - Method for recovering salt and mineral water from seawater - Google Patents

Method for recovering salt and mineral water from seawater Download PDF

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Publication number
JP4011845B2
JP4011845B2 JP2000312840A JP2000312840A JP4011845B2 JP 4011845 B2 JP4011845 B2 JP 4011845B2 JP 2000312840 A JP2000312840 A JP 2000312840A JP 2000312840 A JP2000312840 A JP 2000312840A JP 4011845 B2 JP4011845 B2 JP 4011845B2
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Prior art keywords
seawater
cooker
salt
oil
water
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Expired - Fee Related
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JP2000312840A
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Japanese (ja)
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JP2002121019A (en
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修三 中園
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修三 中園
中園 英司
堤 守幸
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Description

【0001】
【発明の属する技術分野】
この発明は、海水から塩及びミネラルウォーターを回収する方法に関する。
【0002】
【従来の技術】
従来、海水より蒸留水を製造する方法として、本発明者が発明した特公平01−005954がある。この発明は、海水を動植物油中で加熱するに際し、二段階の減圧条件下で加熱し海水より蒸留水を回収する方法であり、海水より蒸発した水分を蒸留水として回収するものである。
【0003】
【発明が解決しようとする課題】
ところが、この蒸留水を回収する方法では、蒸留水の回収を主体としたものであるため、蒸留水が蒸発した後の塩の回収が充分ではなく、かつ高温により塩が劣化し、製塩には適しないものであり、更には、油中より塩を回収する手段が明確になっていなかった。
【0004】
【課題を解決するための手段】
この発明は、動物油または植物油を収納したクッカー中に海水を収納して、動物油または植物油と接触状態とすると共に、クッカー内を攪拌翼にて攪拌しながら加熱し、収納海水の常温を100℃〜110℃とし、かつ処理初期においてはクッカー内の圧力を絶対圧500〜600mmHgに減圧し、海水より水分を蒸発させ蒸気を回収してミネラルを含有したミネラルウォーターを得ると共に、処理終期には、絶対圧をほぼ真空に近い10〜30mmHgとし、次いで塩が残留した油をクッカーより取り出して、残留した塩を遠心分離器にて搾油し、ノーマルヘキサンを噴霧して塩に油味を残した状態で脱油することにより、塩を回収することを特徴とした海水から塩及びミネラルウォーターを回収する方法を提供せんとするものである。
【0005】
【発明の実施の形態】
この発明は、クッカー中に予め動物油または植物油を収納しておき、クッカーの周壁及び攪拌軸にそれぞれ成形したジャケット部に蒸気を送って、クッカー内部を加熱する。
【0006】
かかるクッカー内に海水を収納する。海水は予めフィルターにより夾雑物を除去しておき、供給ポンプを介して送水される。海水のクッカーへの供給は、クッカーの底部より一定圧力により油中に連続して供給する。
【0007】
クッカー内は、収納した海水の常温が100℃〜110℃となるように加熱されており、しかも、クッカー内の圧力は、二段階に操作される。すなわち、処理初期においては、絶対圧が500〜600mmHgとなるように減圧し、海水の水分がほぼ蒸発してしまい、残留した塩を取り出す処理終期においては、絶対圧が10〜30mmHgとなるように減圧する。
【0008】
10m3の容量のクッカーは、1時間で5〜6トンの海水を処理可能な蒸発能力を有し、しかも、10〜24時間の連続運転が可能であるように構成している。
【0009】
従って、海水を1時間当たり5トンの蒸発能力で処理したとすると、クッカーを10時間連続運転した場合には、一回の運転で海水50トンを蒸発処理することができ、24時間連続運転した場合は、一回の運転で120トンの海水を蒸発処理することができる。
【0010】
このようにして、クッカー中で動物油または植物油を熱媒体として海水を加熱しながら、クッカー内を攪拌翼にて1分間約8回転の連続で攪拌していくと、海水中の水は蒸留水として回収されていく。
【0011】
すなわち、クッカーより蒸発した水はセパレーターを介して油分を除去され、コンデンサーにより凝縮水として回収され、フィルターを介してミネラルウォーターとして回収される。
【0012】
他方、蒸留水が回収された後の海水は、塩として油中に残留する。従って、クッカー中より塩の混入した油を取り出して、横型遠心分離器により搾油して塩を取り出す。
【0013】
塩は、ノーマルヘキサンを噴霧することにより脱油されて塩製品となる。
【0014】
この製塩の過程において、塩には一定の油分を残留しておき、塩に油の香りを残した状態としている。
【0015】
クッカーに収納する海水量は、10m3のクッカー中に連続して10トン(10m3)とし、2時間の処理で20000ppmの塩分濃度の海水10トンよりミネラルウォーター9800kgを回収し、塩200kgを回収する。
【0016】
以上のようにして海水より回収したミネラルウォーターの分析結果は、油としてコーン油を使用した場合、
ナトリウム 1.99mg/l
カリウム 2.70mg/l
カルシウム 0.05mg/l
マグネシウム 0.33mg/l
であり、油中に残留した塩は、
ナトリウム 10.02%
カリウム 2.66%
カルシウム 0.69%
マグネシウム 8.84%
となる。
【0017】
上記のように処理するプラントは、図1に示すように構成されるものであり、1は海水の夾雑物を除去するためのフィルター、2は海水をクッカー3に送るための供給ポンプ、4は海水をクッカー3の底部よりクッカー3の油中に送るための送水耐圧ホースまたは配管、5はクッカー3のジャケット部に蒸気を送るためのボイラー設備、7はクッカー3から蒸発した蒸気の含有油分を除去するためのセパレーター、8は蒸気をドレン化するためのコンデンサー、9はクーリングタワー、10は真空ポンプ、11はミネラルウォータータンク、12はフィルター、13はクッカー3中に油を供給するオイルポンプ、14はオイルタンク、15はクッカー3の排出口3-1の下方に配した油を受けるための受けタンク、16は受けタンク15に連通した定量ポンプ、17は定量ポンプ16により送られた処理済みの塩混合油から搾油するための横型遠心分離器、18は遠心分離器17により搾油した塩を送るためのコンベヤを示す。
【0018】
【発明の効果】
本発明によれば、動物油または植物油を収納したクッカー中に海水を収納して、動物油または植物油と接触状態とすると共に、クッカー内を攪拌翼にて攪拌しながら加熱し、収納海水の常温を100℃〜110℃とし、かつ処理初期においてはクッカー内の圧力を絶対圧500〜600mmHgに減圧し、海水より水分を蒸発させ蒸気を回収してミネラルを含有したミネラルウォーターを得るようにしたために、海水をクッカー中で攪拌することにより油との接触が万遍なく行え、単に容器外から海水を加熱した場合と異なり、効率的に海水から脱水を行うことができる効果があり、更には、圧力を二段階に分けて減圧するために、低温による加熱で効率よく水を蒸発させることができ、海水に含まれる塩の劣化を防止できる効果を有する。
【0019】
また、処理終期には、処理終期には、絶対圧をほぼ真空に近い10〜30mmHgとし、次いで塩が残留した油をクッカーより取り出して、残留した塩を遠心分離器にて搾油し、ノーマルヘキサンを噴霧して塩に油味を残した状態で脱油することにより、塩を回収することによって、蒸留水が蒸発した後の塩の回収を充分に行うことができると共に、塩が劣化することがなく、更には、塩に一部油の香りを付着させたままとなるため、塩味と油味が調和して塩味を柔らかくすることができる効果がある。
【図面の簡単な説明】
【図1】本発明の海水から塩及びミネラルウォーターを回収する方法を示すフローシート。
【符号の説明】
1 フィルター
2 供給ポンプ
3 クッカー
3-1 排出口
4 送水耐圧ホース
5 ボイラー設備
7 セパレーター
8 コンデンサー
9 クーリングタワー
10 真空ポンプ
11 ミネラルウォータータンク
12 フィルター
13 オイルポンプ
14 オイルタンク
15 受けタンク
16 定量ポンプ
17 横型遠心分離器
18 コンベヤ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for recovering salt and mineral water from seawater.
[0002]
[Prior art]
Conventionally, as a method for producing distilled water from seawater, there is Japanese Patent Publication No. 01-005954 invented by the present inventors. The present invention is a method for recovering distilled water from seawater by heating the seawater in animal or vegetable oil under two-stage decompression conditions, and recovers water evaporated from seawater as distilled water.
[0003]
[Problems to be solved by the invention]
However, in this method of recovering distilled water, recovery of distilled water is the main method, so recovery of salt after evaporation of distilled water is not sufficient, and salt deteriorates due to high temperature, In addition, the means for recovering the salt from the oil has not been clarified.
[0004]
[Means for Solving the Problems]
The present invention accommodates the seawater in cooker housing the animal or vegetable oils, as well as the contact with the animal or vegetable oils, and heated with stirring in a cooker at stirring blade, a cold storage seawater 1 00 ° C. In the initial stage of treatment, the pressure in the cooker is reduced to an absolute pressure of 500 to 600 mmHg to evaporate water from seawater and collect steam to obtain mineral water containing minerals. The absolute pressure is 10-30 mmHg, which is almost vacuum, and then the oil with salt remaining is taken out from the cooker, the remaining salt is squeezed with a centrifuge, and normal hexane is sprayed to leave an oily taste in the salt. It is intended to provide a method for recovering salt and mineral water from seawater characterized by recovering salt by deoiling.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, animal oil or vegetable oil is stored in advance in a cooker, and steam is sent to jacket portions formed on the peripheral wall and stirring shaft of the cooker, respectively, to heat the inside of the cooker.
[0006]
Seawater is stored in the cooker. The seawater is preliminarily removed with a filter and is fed through a supply pump. The supply of seawater to the cooker is continuously supplied into the oil at a constant pressure from the bottom of the cooker.
[0007]
The inside of the cooker is heated so that the normal temperature of the stored seawater is 100 ° C to 110 ° C, and the pressure in the cooker is operated in two stages. That is, at the initial stage of the treatment, the pressure is reduced so that the absolute pressure becomes 500 to 600 mmHg, and the water in the seawater is almost evaporated, and at the end of the treatment for removing the remaining salt, the absolute pressure is 10 to 30 mmHg. Reduce pressure.
[0008]
The cooker having a capacity of 10 m 3 has an evaporation capacity capable of processing 5 to 6 tons of seawater in one hour and is configured to be capable of continuous operation for 10 to 24 hours.
[0009]
Therefore, assuming that seawater is treated with an evaporation capacity of 5 tons per hour, when the cooker is operated continuously for 10 hours, 50 tons of seawater can be evaporated in a single operation and operated continuously for 24 hours. In this case, 120 tons of seawater can be evaporated in one operation.
[0010]
In this way, when seawater is heated in a cooker using animal oil or vegetable oil as a heat medium and the inside of the cooker is continuously stirred for about 8 revolutions for 1 minute with a stirring blade, the water in the seawater is converted into distilled water. It will be collected.
[0011]
That is, the water evaporated from the cooker is oil-removed through the separator, recovered as condensed water by the condenser, and recovered as mineral water through the filter.
[0012]
On the other hand, the seawater after the distilled water is recovered remains in the oil as a salt. Therefore, the salt-mixed oil is taken out from the cooker and squeezed with a horizontal centrifuge to take out the salt.
[0013]
The salt is deoiled by spraying normal hexane into a salt product.
[0014]
In this salt-making process, a certain amount of oil remains in the salt, leaving the scent of oil in the salt.
[0015]
Seawater amount to be stored in cooker, a continuous for 10 tons of cooker 10m 3 (10m 3), the mineral water 9800kg recovered from seawater 10 tons of salt concentration 20000ppm at the 2 hours, collect the salt 200kg To do.
[0016]
The analysis results of mineral water collected from seawater as described above are as follows when corn oil is used as the oil.
Sodium 1.99mg / l
Potassium 2.70mg / l
Calcium 0.05mg / l
Magnesium 0.33mg / l
The salt remaining in the oil is
Sodium 10.02%
Potassium 2.66%
Calcium 0.69%
Magnesium 8.84%
It becomes.
[0017]
The plant to be treated as described above is configured as shown in FIG. 1, 1 is a filter for removing seawater impurities, 2 is a supply pump for sending seawater to the cooker 3, A water pressure hose or pipe for sending seawater from the bottom of the cooker 3 into the oil of the cooker 3, 5 is a boiler facility for sending steam to the jacket of the cooker 3, 7 is the oil content of the steam evaporated from the cooker 3 Separator for removal, 8 is a condenser for draining steam, 9 is a cooling tower, 10 is a vacuum pump, 11 is a mineral water tank, 12 is a filter, 13 is an oil pump for supplying oil into the cooker 3, 14 Is an oil tank, 15 is a receiving tank for receiving oil disposed below the outlet 3-1 of the cooker 3, 16 is a metering pump communicating with the receiving tank 15, and 17 is a metering pump. Horizontal centrifuge for oil extraction from the treated salt mixed oil sent by pump 16, 18 indicates a conveyor for feeding the salt was oil extraction by centrifugal separator 17.
[0018]
【The invention's effect】
According to the present invention, accommodating the seawater in cooker housing the animal or vegetable oils, as well as the contact with the animal or vegetable oils, and heated with stirring in a cooker at stirring blade, a cold storage seawater 1 Because the pressure in the cooker was reduced to an absolute pressure of 500 to 600 mmHg at the initial stage of the treatment, and the water was evaporated from seawater to collect the steam to obtain mineral water containing minerals. By stirring the seawater in the cooker, contact with the oil can be made evenly, and unlike the case where the seawater is simply heated from outside the container, there is an effect that it can be efficiently dehydrated from the seawater. Since the pressure is reduced in two steps, water can be efficiently evaporated by heating at a low temperature, and the salt contained in the seawater can be prevented from deteriorating.
[0019]
At the end of the treatment, at the end of the treatment, the absolute pressure is set to 10 to 30 mmHg, which is almost vacuum, and then the oil in which the salt remains is taken out from the cooker, and the remaining salt is squeezed with a centrifuge, and normal hexane is obtained. By recovering the salt by spraying the oil and leaving the oily taste in the salt , the salt can be sufficiently recovered after the distilled water has evaporated, and the salt deteriorates. Furthermore, since the fragrance of the oil remains partly attached to the salt, the salty taste and oily taste are harmonized and the salty taste can be softened.
[Brief description of the drawings]
FIG. 1 is a flow sheet showing a method for recovering salt and mineral water from seawater of the present invention.
[Explanation of symbols]
1 Filter 2 Supply pump 3 Cooker
3-1 Discharge port 4 Water supply pressure hose 5 Boiler equipment 7 Separator 8 Condenser 9 Cooling tower
10 Vacuum pump
11 Mineral water tank
12 Filter
13 Oil pump
14 Oil tank
15 Receiving tank
16 Metering pump
17 Horizontal centrifuge
18 Conveyor

Claims (1)

動物油または植物油を収納したクッカー(3)中に海水を収納して、動物油または植物油と接触状態とすると共に、クッカー(3)内を攪拌翼にて攪拌しながら加熱し、収納海水の常温を100℃〜110℃とし、かつ処理初期においてはクッカー(3)内の圧力を絶対圧500〜600mmHgに減圧し、海水より水分を蒸発させ蒸気を回収してミネラルを含有したミネラルウォーターを得ると共に、処理終期には、絶対圧をほぼ真空に近い10〜30mmHgとし、次いで塩が残留した油をクッカー(3)より取り出して、残留した塩を遠心分離器にて搾油し、ノーマルヘキサンを噴霧して塩に油味を残した状態で脱油することにより、塩を回収することを特徴とした海水から塩及びミネラルウォーターを回収する方法。Seawater is stored in a cooker (3) containing animal oil or vegetable oil to bring it into contact with animal oil or vegetable oil, and the cooker (3) is heated while stirring with a stirring blade , so that the room temperature of the stored seawater is 1 In the initial stage of the treatment, the pressure in the cooker (3) is reduced to an absolute pressure of 500 to 600 mmHg to evaporate water from the seawater and collect steam to obtain mineral water containing minerals. At the end of the treatment, the absolute pressure is set to 10-30 mmHg, which is close to vacuum, and then the oil with residual salt is taken out from the cooker (3), and the residual salt is squeezed with a centrifuge and sprayed with normal hexane. by deoiling while leaving the Avrami salt, process for the recovery of salts and mineral water from sea water and recovering the salt.
JP2000312840A 2000-10-13 2000-10-13 Method for recovering salt and mineral water from seawater Expired - Fee Related JP4011845B2 (en)

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CN101830529B (en) * 2010-04-18 2012-05-09 胜利油田胜利勘察设计研究院有限公司 Method for preparing clean water by using oil field sewage and for utilizing waste heat
WO2012160955A1 (en) * 2011-05-25 2012-11-29 霧島高原ビール株式会社 Method in which moisture content of processing object is reduced and/or oil-soluble substance in processing object is extracted in oil
CN104696938B (en) * 2013-12-06 2016-08-17 中国石油化工股份有限公司 Mechanical heating power compound type steamed vapour pressure compression system based on wastewater utilization
WO2018163563A1 (en) * 2017-03-08 2018-09-13 株式会社F・E・C Evaporation solid-liquid separation method

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JPS5738983A (en) * 1980-08-18 1982-03-03 Mitsubishi Electric Corp Water making device
JPS5898182A (en) * 1981-12-03 1983-06-10 Shuzo Nakazono Desalination of sea water
JPH02153887A (en) * 1988-12-02 1990-06-13 Shuzo Nakazono Dehydration by heat of oil
JP2887105B2 (en) * 1996-04-24 1999-04-26 幸子 林 Method and apparatus for producing drinking water and salt
JPH11159959A (en) * 1997-11-25 1999-06-15 Shuzo Nakazono Method for dewatering treatment with oil heat at lower temperature

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