JP2012066161A5 - - Google Patents
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- JP2012066161A5 JP2012066161A5 JP2010210664A JP2010210664A JP2012066161A5 JP 2012066161 A5 JP2012066161 A5 JP 2012066161A5 JP 2010210664 A JP2010210664 A JP 2010210664A JP 2010210664 A JP2010210664 A JP 2010210664A JP 2012066161 A5 JP2012066161 A5 JP 2012066161A5
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- dechlorination
- acid
- water
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- activated carbon
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Description
（脱塩工程）
本工程において、逆浸透膜処理は、供給水を高圧下で膜透過水と濃縮水に膜分離する処理操作であり、逆浸透膜処理の方法及び装置は、現在公知のものを適宜採用すればよい。
( Desalting step)
In this step, the reverse osmosis membrane treatment is a treatment operation in which the feed water is membrane-separated into membrane permeate and concentrated water under high pressure, and a currently known method and apparatus for reverse osmosis membrane treatment can be appropriately employed. Good.
脱塩処理方法として、逆浸透膜処理を採用した場合、処理水回収率を向上させる上で最大の阻害因子となるのが、濃縮水中における溶性ケイ酸の析出である。
そこで、溶性ケイ酸の溶解度を高めるために、脱塩工程に供給する水のｐＨを高くして水回収率を高くするのが好ましい。この際、脱塩工程に供給する水のｐＨを９．０以上にすれば、溶性ケイ酸の溶解度を高める効果を得ることができる一方、ｐＨを一定以上に高くし過ぎても、水回収率の向上に繋がらない反面、後工程において塩素の消毒効果が低下するため塩素濃度を高くする必要が生じる。かかる観点から、脱塩工程に供給する水のｐＨを９．０〜１０．５、中でも９．５〜１０．５に調整するのが好ましい。
この際、ｐＨ調整に用いるアルカリ剤としては、水酸化ナトリウムや水酸化カリウムなどの水酸化物、重炭酸ナトリウムなどの炭酸塩などを挙げることができる。これらに限定するものではない。特に水酸化ナトリウムが好適である。
When reverse osmosis membrane treatment is adopted as the desalting treatment method, precipitation of soluble silicic acid in the concentrated water is the largest inhibitory factor in improving the treated water recovery rate.
Therefore, in order to increase the solubility of the soluble silicic acid, it is preferable to increase the water recovery rate by increasing the pH of the water supplied to the desalting step. At this time, if the pH of the water supplied to the desalting step is set to 9.0 or higher, the effect of increasing the solubility of the soluble silicic acid can be obtained. On the other hand, the water recovery rate can be increased even if the pH is set higher than a certain level. However, since the disinfection effect of chlorine is lowered in the subsequent process, it is necessary to increase the chlorine concentration. From this point of view, it is preferable to adjust the pH of water supplied to the desalting step to 9.0 to 10.5, particularly 9.5 to 10.5.
At this time, examples of the alkali agent used for pH adjustment include hydroxides such as sodium hydroxide and potassium hydroxide, carbonates such as sodium bicarbonate, and the like. It is not limited to these. Sodium hydroxide is particularly preferred.
具体的には、図１〜４に示すように、アルカリ剤貯槽４、薬注ポンプ５、制御計６、ｐＨ計７から構成される装置によるアルカリ調整工程を、脱塩工程の前に配置し、溶性ケイ酸を含有する原水１６にアルカリを添加してｐＨを９．０〜１０．５に調整して溶性ケイ酸の溶解度を大きくした状態で、逆浸透膜処理装置１による脱塩工程に供給して溶解塩類を除去するようにすればよい。但し、このような具体的手段に限定するものではない。 Specifically, as shown in FIGS. 1 to 4, an alkali adjustment process using an apparatus composed of an alkaline agent storage tank 4, a chemical injection pump 5, a control meter 6, and a pH meter 7 is arranged before the desalting step. , in a state in which by adding an alkali to the raw water 16 containing soluble silicate to adjust the pH to 9.0 to 10.5 to increase the solubility of the soluble silicate, as desalting Engineering by reverse osmosis membrane treatment apparatus 1 The dissolved salt may be removed by supplying to the solution. However, it is not limited to such specific means.
具体的には、図１〜４に示すように、塩素剤貯槽８、薬注ポンプ９、制御計１０、残留塩素計１１から構成される装置による消毒工程を、脱塩工程の次に配し、塩素剤を添加して、用水貯留槽２及び配管などの装置による用水貯留工程における菌繁殖を防止するようにするのが好ましい。但し、このような具体的手段に限定するものではない。 Specifically, as shown in FIGS. 1 to 4, a disinfection process using a device composed of a chlorine storage tank 8, a chemical injection pump 9, a control meter 10, and a residual chlorine meter 11 is arranged next to the desalting step. It is preferable to add a chlorinating agent so as to prevent bacterial growth in the water storage step using the water storage tank 2 and piping. However, it is not limited to such specific means.
逆流洗浄の具体例としては、図１及び図２に示すように、通常状態、すなわち洗浄を行わない状態においては、切換バルブ２１及び切換バルブ１９を開、切換バルブ２２及び切換バルブ２０を閉として、脱塩素処理装置３による脱塩素処理工程に通水し、脱塩素処理を行うようにする。
そして、脱塩素処理装置３を洗浄する際には、切換バルブ２１および切換バルブ１９を閉とし、切換バルブ２２及び切換バルブ２０を開として、切換バルブ２２と脱塩素処理装置３の間に設けた酸調整設備、すなわち酸剤貯槽１２、薬注ポンプ１３、制御計１４及びｐＨ計１５から構成される酸調整設備又は炭酸ガス貯槽２３、電磁流量計２４、制御計１４及びｐＨ計１５から構成される酸調整設備によって酸添加水を調製し、脱塩素処理装置３の逆流洗浄を行い、脱塩素処理装置充填剤の活性点の再生を行うようにすればよい。
但し、このような具体的手段に限定するものではない。
As a specific example of backflow cleaning, as shown in FIGS. 1 and 2, in a normal state, that is, in a state where cleaning is not performed, the switching valve 21 and the switching valve 19 are opened, and the switching valve 22 and the switching valve 20 are closed. Then, water is passed through the dechlorination process by the dechlorination apparatus 3 to perform the dechlorination process.
When the dechlorination apparatus 3 is cleaned, the switching valve 21 and the switching valve 19 are closed, the switching valve 22 and the switching valve 20 are opened, and the dechlorination apparatus 3 is provided between the switching valve 22 and the dechlorination apparatus 3. An acid adjustment facility, that is, an acid agent storage tank 12, a chemical injection pump 13, a controller 14 and a pH meter 15, an acid adjustment facility or a carbon dioxide gas storage tank 23, an electromagnetic flow meter 24, a controller 14 and a pH meter 15. The acid-added water is prepared by the acid adjusting equipment , the backwashing of the dechlorination apparatus 3 is performed, and the active point of the dechlorination apparatus filler is regenerated.
However, it is not limited to such specific means.
他方、順流洗浄の具体例としては、図３及び図４に示すように、通常状態、すなわち洗浄を行わない状態においては、切換バルブ１９を開、切換バルブ２０を閉として、脱塩素処理装置３による脱塩素処理工程に通水し、脱塩素処理を行うようにする。
そして、脱塩素処理装置３を洗浄する際には、切換バルブ１９を閉、切換バルブ２０を開として、用水貯留槽２と脱塩素処理装置３の間に設けた酸調整設備、すなわち酸剤貯槽１２、薬注ポンプ１３、制御計１４及びｐＨ計１５から構成される酸調整設備又は炭酸ガス貯槽２３、電磁流量計２４、制御計１４及びｐＨ計１５から構成される酸調整設備によってｐＨ８．６以下とした酸添加水を調製し、脱塩素処理装置３の順流洗浄を行い、脱塩素処理装置充填剤の活性点の再生を行うようにすればよい。
但し、このような具体的手段に限定するものではない。
On the other hand, as a specific example of the forward flow cleaning, as shown in FIGS. 3 and 4, in the normal state, that is, in the state where cleaning is not performed, the switching valve 19 is opened and the switching valve 20 is closed, so that the dechlorination apparatus 3 Water is passed through the dechlorination process by, so that dechlorination is performed.
When the dechlorination apparatus 3 is washed, the switching valve 19 is closed and the switching valve 20 is opened, so that an acid adjustment facility provided between the water storage tank 2 and the dechlorination apparatus 3, that is, an acid agent storage tank. 12, pH 8.6 by an acid adjustment facility or a carbon dioxide gas storage tank 23, an electromagnetic flow meter 24, a control meter 14, and a pH meter 15 composed of a chemical injection pump 13, a control meter 14 and a pH meter 15. The following acid-added water is prepared, and the dechlorination apparatus 3 is washed in the forward direction to regenerate the active sites of the dechlorination apparatus filler.
However, it is not limited to such specific means.
Claims (7)
酸を添加した酸添加水で前記脱塩素処理槽を洗浄することにより、活性炭の脱塩素能力を回復させることを特徴とする飲料用水の製造方法。 Desalination process for treating raw water with reverse osmosis membrane, disinfection process for adding chlorine agent to treated water treated with reverse osmosis membrane, and disinfecting water obtained in the disinfection process is passed through a dechlorination tank equipped with activated carbon. A method for producing drinking water comprising a dechlorination step of dechlorinating by hydrating,
A method for producing drinking water, wherein the dechlorination ability of activated carbon is recovered by washing the dechlorination tank with acid-added water to which an acid has been added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010210664A JP5670685B2 (en) | 2010-09-21 | 2010-09-21 | Recovery method of dechlorination ability of activated carbon in the manufacturing process of drinking water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010210664A JP5670685B2 (en) | 2010-09-21 | 2010-09-21 | Recovery method of dechlorination ability of activated carbon in the manufacturing process of drinking water |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2012066161A JP2012066161A (en) | 2012-04-05 |
| JP2012066161A5 true JP2012066161A5 (en) | 2013-11-07 |
| JP5670685B2 JP5670685B2 (en) | 2015-02-18 |
Family
ID=46164073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010210664A Active JP5670685B2 (en) | 2010-09-21 | 2010-09-21 | Recovery method of dechlorination ability of activated carbon in the manufacturing process of drinking water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5670685B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014103083A1 (en) * | 2012-12-27 | 2014-07-03 | 株式会社レドックス | Electrolyzed water conforming to standards for water used in soft-drink manufacturing, and method for manufacturing said electrolyzed water |
| JP2019130506A (en) * | 2018-02-01 | 2019-08-08 | アクアデザインシステム株式会社 | Chlorine injection device for water purifier |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61242687A (en) * | 1985-04-19 | 1986-10-28 | Mitsubishi Rayon Co Ltd | Purified water generator |
| JPH0712471B2 (en) * | 1990-01-29 | 1995-02-15 | 荏原インフイルコ株式会社 | How to sterilize and decontaminate activated carbon |
| JPH07121388B2 (en) * | 1991-06-26 | 1995-12-25 | 株式会社荏原製作所 | Sterilization and neutralization method of activated carbon with acid and alkali |
| JP2546750B2 (en) * | 1991-06-28 | 1996-10-23 | 株式会社荏原製作所 | How to sterilize activated carbon |
| JPH10202249A (en) * | 1997-01-16 | 1998-08-04 | Kurita Water Ind Ltd | Deionizing method |
| JPH11262766A (en) * | 1998-03-19 | 1999-09-28 | Daisen Membrane Systems Kk | Reverse osmosis membrane type water purifier |
-
2010
- 2010-09-21 JP JP2010210664A patent/JP5670685B2/en active Active
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