JP2007090268A - Mobile scale component removal apparatus and system - Google Patents
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- JP2007090268A JP2007090268A JP2005284688A JP2005284688A JP2007090268A JP 2007090268 A JP2007090268 A JP 2007090268A JP 2005284688 A JP2005284688 A JP 2005284688A JP 2005284688 A JP2005284688 A JP 2005284688A JP 2007090268 A JP2007090268 A JP 2007090268A
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Abstract
【課題】電解処理装置等のスケール成分除去手段を被処理水系の近傍に常設することなく、スケール成分除去処理の必要が生じたときにのみ被処理水系の現場に搬入して、被処理水中のスケール成分除去処理を行うことができる移動式スケール成分除去装置およびシステムを提供する。
【解決手段】被処理水を処理して被処理水中のスケール成分を除去するスケール成分除去手段４を車両１に搭載してなる移動式スケール成分除去装置１０。この移動式スケール成分除去装置と、被処理水系におけるスケール析出傾向を感知するスケール析出傾向感知手段と、該スケール析出傾向感知手段で感知した情報をもとに該移動式スケール成分除去装置を該被処理水系に送り出す制御手段とを備えた移動式スケール成分除去システム。
【選択図】図１A scale component removing means such as an electrolytic treatment device is not permanently installed in the vicinity of the water to be treated, and only when a scale component removal treatment is necessary, it is brought into the site of the water to be treated and A mobile scale component removal apparatus and system capable of performing a scale component removal process are provided.
A mobile scale component removing device 10 includes a vehicle 1 equipped with a scale component removing means 4 for treating the treated water to remove scale components in the treated water. The mobile scale component removal apparatus, the scale deposition tendency sensing means for sensing the scale deposition tendency in the water to be treated, and the mobile scale component removal apparatus based on the information sensed by the scale deposition tendency sensing means. A mobile scale component removal system comprising control means for sending to a treated water system.
[Selection] Figure 1
Description
本発明は、循環型冷却水系、逆浸透（ＲＯ）膜分離装置の循環濃縮水系などの、スケール障害が問題になる水系におけるスケール析出を防止するための移動式スケール成分除去装置およびシステムに関する。 The present invention relates to a mobile scale component removing apparatus and system for preventing scale precipitation in an aqueous system in which scale failure is a problem, such as a circulating cooling water system and a circulating concentrated water system of a reverse osmosis (RO) membrane separator.
工場、ビルなどのコンプレッサー、冷凍機で発生した廃熱は、熱交換器を介して冷却水（冷却媒体）で冷却されている。熱交換器において、廃熱との熱交換で温度が上昇した冷却水は開放型冷却塔で空気と接触することで蒸発して放熱、冷却され、再び熱交換器に循環される。従って、このような循環型冷却水系では、冷却塔で蒸発ないし飛散して減少した水量に相当する補給水が補給されて運転が行われている。 Waste heat generated in compressors and refrigerators in factories and buildings is cooled with cooling water (cooling medium) through a heat exchanger. In the heat exchanger, the cooling water whose temperature has risen due to heat exchange with waste heat evaporates by contacting with air in the open cooling tower, is dissipated and cooled, and is circulated again to the heat exchanger. Therefore, in such a circulation type cooling water system, operation is performed by supplying supplementary water corresponding to the amount of water reduced by evaporation or scattering in the cooling tower.
しかし、そのままでは補給水中に含有されるスケール成分が冷却水系内で濃縮されて、その溶解度を超え、熱交換器の伝熱面、冷却塔の充填材や底部或いは配管にスケールとして析出して付着し、熱交換効率の低下、通水抵抗の増加といった様々な運転障害を引き起こす。 However, as it is, the scale components contained in the make-up water are concentrated in the cooling water system, exceeding its solubility, and depositing as scale on the heat transfer surface of the heat exchanger, the cooling tower filler, bottom, or piping. However, various operational failures such as a decrease in heat exchange efficiency and an increase in water flow resistance are caused.
そこで、系内をスケール析出が起こらない硬度で運転するために、冷却塔の底部から、濃縮された冷却水をブロー水として系外へ排出し、補給水で全体を希釈することにより、循環冷却水を一定の水質で運転管理することが行われている。ここで、ブロー水量を多くして、系内のスケール成分濃度を低くして運転すると、補給水を多く必要として水道料金が過大となる。反対に、ブロー水量を少なくして高濃縮運転を行うと、冷却水中のスケール成分が溶解度を超え難溶塩のスケールが析出することとなる。 Therefore, in order to operate the system with a hardness that does not cause scale precipitation, circulating cooling is performed by discharging concentrated cooling water out of the system as blow water from the bottom of the cooling tower and diluting the whole with make-up water. Operation and management of water with a certain level of water quality is being carried out. Here, if the amount of blow water is increased and the scale component concentration in the system is lowered, operation requires a large amount of makeup water, resulting in excessive water charges. On the other hand, when the high concentration operation is performed with the amount of blown water reduced, the scale component in the cooling water exceeds the solubility, and the scale of the hardly soluble salt is deposited.
従来、このような冷却水系内のスケール析出を防止するために、リン酸系薬剤やカルボン酸系など各種ポリマーよりなるスケール防止剤を添加することが行われているが、薬剤コストが嵩む。また、溶存した薬剤が放流域に住む水生生物へ影響を与える可能性があることから、下水道放流または水処理が必要となるという問題もあった。また、薬剤は定期的に補充することが必要であり、その人員コストも問題となっている。 Conventionally, in order to prevent such scale precipitation in the cooling water system, a scale inhibitor made of various polymers such as a phosphoric acid-based chemical and a carboxylic acid-based chemical has been added, but the cost of the drug increases. Moreover, since the dissolved chemical | medical agent may affect the aquatic organism which lives in a discharge area, there also existed a problem that a sewer discharge or water treatment was needed. In addition, the medicine needs to be replenished regularly, and its personnel cost is also a problem.
従って、スケール防止剤を用いることなく、冷却水系のスケールの析出を防止することが望まれる。 Therefore, it is desired to prevent the precipitation of the scale of the cooling water system without using a scale inhibitor.
一方、ＲＯ膜処理水系の場合、原水（ＲＯ給水）中の成分を濃縮した濃縮水（ＲＯブライン水）は一般に水回収率の向上のために供給水に混合してＲＯ膜で循環処理される。この場合、ブライン水中の硬度成分濃度が高くなると、ＲＯ膜表面で難溶性塩のスケールが析出してフラックスが低下してゆき、著しい場合には運転停止につながる。 On the other hand, in the case of the RO membrane treated water system, the concentrated water (RO brine water) obtained by concentrating the components in the raw water (RO feed water) is generally mixed with the supply water and circulated through the RO membrane to improve the water recovery rate. . In this case, when the hardness component concentration in the brine water is increased, the scale of the hardly soluble salt is deposited on the surface of the RO membrane, and the flux is lowered.
このような場合には、通常、ＲＯ給水に薬剤を添加して、膜面でのスケール析出を抑制したり、スケールが析出しない硬度で運転したりするが、膜面では特に高い濃縮が起こるため膜面近傍の硬度成分濃度は非常に高くなり、薬剤によるスケール抑制限界濃度を超えてスケールが析出しやすい状況となる。 In such a case, a chemical is usually added to the RO water supply to suppress the scale deposition on the membrane surface or to operate at a hardness at which the scale does not precipitate, but a particularly high concentration occurs on the membrane surface. The hardness component concentration in the vicinity of the film surface becomes very high, and the scale is likely to precipitate beyond the scale limit concentration limit due to the drug.
従って、ＲＯブライン水系においても、膜面でのスケール析出を起こさずに長期間連続運転するには、薬剤以外のスケール析出対策を講じることが必須である。 Therefore, even in the RO brine system, in order to continuously operate for a long time without causing scale deposition on the membrane surface, it is essential to take measures against scale deposition other than chemicals.
従来、スケール防止剤を使用しない循環冷却水系のスケール防止方法として、循環冷却水中のスケール成分を除去する方法が提案されている。 Conventionally, as a method for preventing scale in a circulating cooling water system that does not use a scale inhibitor, a method for removing scale components in the circulating cooling water has been proposed.
例えば、特開２００２−２７３４７７号公報には、冷却水を種晶カラムに通水することで種晶上にスケール成分を析出させて除去する方法が記載されているが、この方法では、析出したスケール成分を廃棄物として排出しなければならないことが問題となる。また、特開２００３−３３４５６１号公報では、サイクロン状の電解装置の内壁を陰極として、スケールを除去しているが、上記公報と同様にスケール排出が問題となると共に、装置の設置スペースが問題となる。 For example, Japanese Patent Application Laid-Open No. 2002-273477 describes a method of depositing and removing a scale component on a seed crystal by passing cooling water through the seed crystal column. The problem is that the scale components must be discharged as waste. Further, in Japanese Patent Laid-Open No. 2003-334561, the scale is removed using the inner wall of the cyclonic electrolyzer as a cathode. However, as in the above publication, scale discharge becomes a problem and the installation space of the apparatus is a problem. Become.
特開２００３−１９０９８８号公報には、冷却水系の補給水または循環水を、極性が変わるバイポーラ電極を有する電解装置に通水し、補給水または循環水に含まれるスケール成分を微小な結晶として析出させることにより、冷却水系におけるスケール付着、特に伝熱面におけるスケール付着を防止する方法が記載されている。 In JP-A-2003-190888, cooling water-based makeup water or circulating water is passed through an electrolyzer having a bipolar electrode whose polarity is changed, and a scale component contained in the makeup water or circulating water is precipitated as fine crystals. Thus, there is described a method for preventing scale adhesion in a cooling water system, particularly scale adhesion on a heat transfer surface.
この電解装置においては、カルシウムイオン、マグネシウムイオン等の陽イオンは導電性粒子の陰極側に集まり、炭酸イオン、シリカなどは陽極側に集まる。陰極付近が高ｐＨのため、陰極付近でスケールが析出する。正負の極性を逆に変換すると陰極は陽極となり、電極表面のｐＨが低下する。そうすることで核とならずに陰極上に析出したスケールを溶解し、電解不良を防ぐことができる。電極近傍で析出したスケールは循環水中へ流れ出て、非常に微細な結晶が冷却水中に分散したものとなる。この微細結晶が核となって、循環水中のスケール成分は系内の熱交換部や冷却塔よりも核を中心に析出する。次第に核は大きくなるが、ブロー水と共に排出され、伝熱面等へのスケール付着が防止される。 In this electrolysis apparatus, cations such as calcium ions and magnesium ions gather on the cathode side of the conductive particles, and carbonate ions and silica gather on the anode side. Since the pH near the cathode is high, scale is deposited near the cathode. When the positive and negative polarities are reversed, the cathode becomes the anode, and the pH of the electrode surface decreases. By doing so, the scale deposited on the cathode without becoming a nucleus can be dissolved, and electrolytic failure can be prevented. The scale deposited in the vicinity of the electrode flows out into the circulating water, and very fine crystals are dispersed in the cooling water. These fine crystals serve as nuclei, and the scale components in the circulating water are deposited around the nuclei rather than in the heat exchange section and cooling tower in the system. Although the nucleus gradually increases, it is discharged together with blow water, and scale adhesion to the heat transfer surface and the like is prevented.
即ち、上記特開２００３−１９０９８８号公報の電解装置を備えた冷却水系において、電解装置で生じた微粒子を含んだ冷却水は熱交換器や冷却塔へ送り込まれ、その部位において溶解度が過飽和状態になる。過飽和状態において新たに結晶核を生成するために必要なエネルギーと既に存在する結晶を元に結晶成長するために必要なエネルギーでは既に存在する結晶を元に成長する方がはるかに必要なエネルギーが小さいので、流れてきたスケール成分の微粒子を種晶としてその上にスケール成分が析出する。そして、微細結晶は堆積するまでは成長せずにブローラインより排出される。 That is, in the cooling water system provided with the electrolysis apparatus of JP-A-2003-190988, the cooling water containing fine particles generated in the electrolysis apparatus is sent to a heat exchanger or a cooling tower, where the solubility is supersaturated. Become. In the supersaturated state, the energy required for generating new crystal nuclei and the energy required for crystal growth based on the existing crystals require much less energy to grow based on the existing crystals. Therefore, the scale component precipitates on the fine particles of the flowing scale component as seed crystals. The fine crystals are discharged from the blow line without growing until they are deposited.
また、特表２００１−５０２２２９号公報には、円筒形容器内に黒鉛よりなる１対の電極を配置すると共に、該電極間に黒鉛等の炭素質材料よりなる導電性の粒子と、シリカ、ガラス、プラスチック等の非導電性の粒子とを混合充填し、この電極間に通電しつつ円筒形容器に水を通水させてスケール生成を低減する方法が記載されている。同号の記載によると、この通電処理によりアルカリが生成し、このアルカリによって結晶核が生成し、スケール生成傾向が低下する。このスケール防止方法では、アルカリ領域でスケール微細結晶の生成と共に電極へのスケール付着も起こり、定期的な洗浄が必要となる。この洗浄方法として、一定時間で電極を極性転換し、アルカリ側でスケール付着した電極が酸性領域となりスケールを剥離・溶解させる技術がある。 In JP-T-2001-502229, a pair of electrodes made of graphite is disposed in a cylindrical container, and conductive particles made of a carbonaceous material such as graphite, silica, glass, and the like are disposed between the electrodes. A method is described in which scale formation is reduced by mixing and filling non-conductive particles such as plastic and allowing water to flow through a cylindrical container while energizing between the electrodes. According to the description of the same issue, alkali is generated by this energization treatment, crystal nuclei are generated by this alkali, and the scale generation tendency is reduced. In this scale prevention method, the scale adheres to the electrodes as well as the generation of the scale fine crystals in the alkaline region, and periodic cleaning is required. As this cleaning method, there is a technique in which the polarity of the electrode is changed in a certain time, and the electrode adhered to the scale on the alkali side becomes an acidic region, and the scale is peeled and dissolved.
しかしながら、電極の極性を転換させる方法では、極性転換によって陽極と陰極が反転するために電極自体の酸化・還元が繰り返され、電極が劣化し易い。電極の多くは酸化・還元どちらかの用途で用いられるが、両極で用いる場合、極性転換の時間によっては電極としての機能を果たす時間が非常に短くなる。例えば、グラファイト電極の場合、陽極で電極自身が酸化され、グラファイト粉末が流出して劣化する。不溶性電極としてよく使用される白金酸化物やイリジウム酸化物を被覆したチタン電極では、陽極での酸化には耐性を有するが、陰極では酸化物が剥離して劣化が進み易い。電極の交換を頻繁に行うことで上記問題は解決されるが、それに要する電極交換費が過大となる。 However, in the method of changing the polarity of the electrode, since the anode and the cathode are inverted by the polarity change, the electrode itself is repeatedly oxidized and reduced, and the electrode is likely to deteriorate. Most of the electrodes are used for either oxidation or reduction, but when used in both electrodes, the time for functioning as an electrode becomes very short depending on the time of polarity change. For example, in the case of a graphite electrode, the electrode itself is oxidized at the anode, and graphite powder flows out and deteriorates. A titanium electrode coated with platinum oxide or iridium oxide, which is often used as an insoluble electrode, is resistant to oxidation at the anode, but the oxide is peeled off at the cathode, and deterioration tends to proceed. Although the above problem can be solved by frequently replacing the electrode, the electrode replacement cost required for this is excessive.
電極劣化を回避したスケール洗浄方法として、特開平９−１４１２６６号公報には、スケールが付着した電解槽を、副電解槽で発生させた酸性水を用いて洗浄する方法および装置が記載されている。しかしながら、この場合には、酸性水を発生させる副電解槽にスケールが析出する。また、洗浄効果を高めるために酸性水を過剰に供給した場合や、酸性水の水素イオン濃度を高めた場合には、放流水のｐＨが５以下となり、下水道法令ｐＨ５．８〜８．６の範囲外となるという問題もある。 As a scale cleaning method that avoids electrode deterioration, Japanese Patent Application Laid-Open No. 9-141266 describes a method and an apparatus for cleaning an electrolytic cell to which a scale is attached using acidic water generated in a secondary electrolytic cell. . However, in this case, scale is deposited in the sub-electrolysis tank that generates acidic water. In addition, when acidic water is excessively supplied to enhance the cleaning effect, or when the hydrogen ion concentration of acidic water is increased, the pH of the discharged water becomes 5 or less, and the sewerage law pH 5.8 to 8.6. There is also the problem of going out of range.
本出願人は先に、循環型冷却水系の水を電解装置に通水して電解処理すると、電極（陰極）にスケールが析出することを利用して循環水中のスケール成分を除去し、系内のスケール生成傾向を下げ、その析出スケールを容易に溶解し、排出する方法として、循環型冷却水系の循環水および／または補給水よりなる被処理水を、電極を有する電解装置に通水して電解して、前記電極表面にスケールを析出させる電解処理工程と、該電解装置に二酸化炭素を供給して前記電極に析出したスケールを除去するスケール成分除去工程とを有する循環型冷却水系の電解処理方法を提案した（特願２００４−２８４４８９号）。 The applicant first removes the scale component in the circulating water by utilizing the fact that the scale is deposited on the electrode (cathode) when water in the circulating cooling water system is passed through the electrolyzer and is electrolyzed. As a method of reducing the scale formation tendency of the water, and easily dissolving and discharging the deposited scale, water to be treated consisting of circulating water and / or makeup water of the circulating cooling water system is passed through an electrolyzer having electrodes. Electrolytic treatment of circulating cooling water system having electrolysis and depositing scale on the electrode surface, and scale component removal step of removing scale deposited on the electrode by supplying carbon dioxide to the electrolyzer A method was proposed (Japanese Patent Application No. 2004-284489).
この方法では、循環型冷却水系の水を電解装置に通水して電解処理と、冷却水は以下のように電解される。
陽極：２Ｈ２Ｏ→Ｏ２＋４Ｈ＋＋４ｅ−
陰極：４Ｈ２Ｏ＋４ｅ−→４ＯＨ−＋２Ｈ２
In this method, circulating cooling water system water is passed through an electrolyzer to perform electrolysis, and the cooling water is electrolyzed as follows.
Anode: 2H 2 O → O 2 + 4H + + 4e −
Cathode: 4H 2 O + 4e − → 4OH − + 2H 2
この反応により陰極近傍では水素が発生してアルカリ性となる。このため、陰極近傍で重炭酸イオンが炭酸イオンに解離し、ＣａイオンおよびＭｇイオンより炭酸カルシウム、炭酸マグネシウムが生成し、これらがスケールとして電極表面に析出することから冷却水系のスケール化傾向が低減される。従って、循環冷却水または補給水をこの電解装置に通水することにより、循環冷却水のスケール生成傾向が低下する。 By this reaction, hydrogen is generated near the cathode and becomes alkaline. For this reason, bicarbonate ions dissociate into carbonate ions in the vicinity of the cathode, and calcium carbonate and magnesium carbonate are formed from Ca ions and Mg ions, which are deposited on the electrode surface as scales, reducing the tendency of the cooling water system to scale Is done. Therefore, the scale formation tendency of the circulating cooling water is reduced by passing the circulating cooling water or makeup water through the electrolyzer.
従って、薬品を使用せずに循環冷却水中スケール成分を析出せず、腐食を起こさない一定濃度で運転することができるため、熱交換部や冷却塔にスケールが析出することが防止ないし抑制および腐食の低減が可能となる。また、補給水の硬度が高い地方においては高濃縮運転が可能となり、節水に繋がる。 Therefore, it can be operated at a constant concentration that does not cause the corrosion of the circulating cooling water without using chemicals and does not cause corrosion. Can be reduced. In regions where the makeup water hardness is high, highly concentrated operation is possible, leading to water saving.
なお、補給水には塩化物イオンなどの塩素成分が含まれているので、電解処理により次亜塩素酸などの酸化剤が発生する。これにより、循環型冷却水系における水の殺菌を行うことができる。 Note that since the makeup water contains chlorine components such as chloride ions, an oxidizing agent such as hypochlorous acid is generated by the electrolytic treatment. Thereby, the sterilization of the water in a circulation type cooling water system can be performed.
この電解処理により、スケール成分除去を継続していると、電極のスケール付着量が増加してくるので、一定時間おきに電解処理装置に二酸化炭素を供給して該スケールを除去する。 If the removal of the scale component is continued by this electrolytic treatment, the amount of scale attached to the electrode increases, so carbon dioxide is supplied to the electrolytic treatment apparatus at regular intervals to remove the scale.
なお、スケールは炭酸カルシウム、水酸化カルシウム、炭酸マグネシウム、水酸化マグネシウムを主成分とするものであり、これらは二酸化炭素と次のように反応して溶解除去される。
ＣＯ２＋Ｈ２Ｏ→Ｈ２ＣＯ３＋Ｈ＋＋ＨＣＯ３ − （二酸化炭素の水への溶解）
ＣａＣＯ３＋ＣＯ２＋Ｈ２Ｏ→Ｃａ２＋＋２ＨＣＯ３ − （炭酸カルシウムの溶解）
Ｃａ（ＯＨ）２＋２Ｈ＋→Ｃａ２＋＋２Ｈ２Ｏ （水酸化カルシウムの溶解）
ＭｇＣＯ３＋ＣＯ２＋Ｈ２Ｏ→Ｍｇ２＋＋２ＨＣＯ３ −（炭酸マグネシウムの溶解）
Ｍｇ（ＯＨ）２＋２Ｈ＋→Ｍｇ２＋＋２Ｈ２Ｏ （水酸化マグネシウムの溶解）
The scale is mainly composed of calcium carbonate, calcium hydroxide, magnesium carbonate, and magnesium hydroxide, and these are dissolved and removed by reacting with carbon dioxide as follows.
CO 2 + H 2 O → H 2 CO 3 + H + + HCO 3 − (dissolution of carbon dioxide in water)
CaCO 3 + CO 2 + H 2 O → Ca 2+ + 2HCO 3 − (dissolution of calcium carbonate)
Ca (OH) 2 + 2H + → Ca 2+ + 2H 2 O (dissolution of calcium hydroxide)
MgCO 3 + CO 2 + H 2 O → Mg 2+ + 2HCO 3 − (dissolution of magnesium carbonate)
Mg (OH) 2 + 2H + → Mg 2+ + 2H 2 O (dissolution of magnesium hydroxide)
この二酸化炭素による溶解方式によると、酸洗浄用薬品の購入や危険な搬入作業が無くなり、薬品コストが削減されると共に、作業の安全性が向上する。また、二酸化炭素を市水に溶解させた場合、水のｐＨは５を下回ることはなく、スケールを溶解させた溶液はｐＨ６以上となるので、下水道放流が可能となる。
特願２００４−２８４４８９号に記載される電解処理装置を用いて被処理水のスケール防止処理をするために、被処理水系から被処理水を引き抜いて電解処理し、またその処理水を被処理水系に戻すようにするには、被処理水を電解処理するための、電解槽ベッセルと電源装置を備える電解型処理装置と、この電解型処理装置に被処理水系から引き抜いた被処理水を送給するための配管と、電解処理水を被処理水系に戻すための配管を設ける必要がある。 In order to perform scale prevention treatment of water to be treated using the electrolytic treatment apparatus described in Japanese Patent Application No. 2004-284489, the water to be treated is extracted from the water to be treated and subjected to electrolytic treatment, and the water to be treated is treated with water. In order to return to water, the electrolytic treatment apparatus provided with an electrolytic cell vessel and a power supply device for electrolytic treatment of the treated water, and the treated water extracted from the treated water system is fed to the electrolytic treatment apparatus. It is necessary to provide a pipe for carrying out the process and a pipe for returning the electrolyzed water to the treated water system.
しかし、被処理水系の一つである循環型冷却水系の冷却塔は、通常、ビルの屋上などの限られた狭い場所に設けられており、多くの場合、このような冷却塔の近傍に電解処理装置や配管類を設けることは困難である。また、電解処理装置を冷却塔から隔離して設けることは配管系統が長く複雑になり、コスト面からもメンテナンス面からも不利である。 However, the cooling tower of the circulating cooling water system, which is one of the treated water systems, is usually installed in a limited and narrow place such as the roof of a building. It is difficult to provide a processing device and piping. Moreover, it is disadvantageous from the standpoints of cost and maintenance that the electrolytic treatment apparatus is provided separately from the cooling tower because the piping system is long and complicated.
また、被処理水系のスケール成分の除去処理は必ずしも常時行う必要はなく、被処理水中にスケール成分が蓄積したときにのみ必要に応じて行えば良い。しかしながら、被処理水系の近傍に電解処理装置やその配管類等を常設する場合には、そのためのスペースが常時デッドスペースとなる上に、電解処理装置の稼動効率も悪い。 Moreover, the removal process of the scale component of the to-be-treated water system is not necessarily performed at all times, and may be performed as necessary only when the scale component is accumulated in the to-be-treated water. However, when an electrolytic treatment apparatus and its piping are permanently installed in the vicinity of the water to be treated, the space therefor is always a dead space and the operation efficiency of the electrolytic treatment apparatus is poor.
本発明は上記従来の問題点を解決し、電解処理装置等のスケール成分除去手段を被処理水系の近傍に常設することなく、スケール成分除去処理の必要が生じたときのみ被処理水系の現場に搬入して、被処理水中のスケール成分除去処理を行うことができる移動式スケール成分除去装置およびシステムを提供することを目的とする。 The present invention solves the above-mentioned conventional problems, and does not permanently install scale component removal means such as an electrolytic treatment apparatus in the vicinity of the treated water system. It is an object of the present invention to provide a mobile scale component removal apparatus and system that can be carried in and perform a scale component removal process in the water to be treated.
本発明（請求項１）の移動式スケール成分除去装置は、被処理水を処理して被処理水中のスケール成分を除去するスケール成分除去手段を車両に搭載してなることを特徴とする。 The mobile scale component removing apparatus of the present invention (Claim 1) is characterized in that scale component removing means for treating the treated water to remove the scale component in the treated water is mounted on the vehicle.
請求項２の移動式スケール成分除去装置は、請求項１において、前記スケール成分除去手段に供給する被処理水を該移動式スケール成分除去装置の外部から導入する被処理水導入手段と、前記スケール成分除去手段でスケール成分除去処理した水を該移動式スケール成分除去装置の外部に送出する処理水送出手段と、前記スケール成分除去手段を作動させるための電力を該移動式スケール成分除去装置の外部から受け入れる電力受入手段、或いは前記スケール成分除去手段を作動させるための電力を該移動式スケール成分除去装置の内部で発生させるか、蓄電している電源と、を備えたことを特徴とする。 The mobile scale component removing device according to claim 2 is the mobile scale component removing device according to claim 1, wherein the water to be treated supplied to the scale component removing device is introduced from outside the mobile scale component removing device, and the scale. Treated water sending means for sending the water whose scale component has been removed by the component removing means to the outside of the mobile scale component removing apparatus, and electric power for operating the scale component removing means to the outside of the mobile scale component removing apparatus And a power supply for generating or storing electric power for operating the scale component removing means in the mobile scale component removing apparatus.
請求項３の移動式スケール成分除去装置は、請求項１または２において、前記スケール成分除去手段で被処理水中から除去したスケール成分をスケールとして貯留するスケール貯留手段と、該スケール貯留手段内のスケールを該移動式スケール成分除去装置の外部へ排出するスケール排出手段と、を備えたことを特徴とする。 The mobile scale component removing apparatus according to claim 3 is the scale storing means for storing, as a scale, the scale component removed from the water to be treated by the scale component removing means according to claim 1 or 2, and the scale in the scale storing means. And a scale discharging means for discharging to the outside of the mobile scale component removing device.
請求項４の移動式スケール成分除去装置は、請求項１ないし３のいずれか１項において、前記スケール成分除去手段が電解処理装置であることを特徴とする。 According to a fourth aspect of the present invention, there is provided the mobile scale component removing apparatus according to any one of the first to third aspects, wherein the scale component removing means is an electrolytic treatment apparatus.
本発明（請求項５）の移動式スケール成分除去システムは、請求項１ないし４のいずれか１項に記載の移動式スケール成分除去装置と、被処理水系におけるスケール析出傾向を感知するスケール析出傾向感知手段と、該スケール析出傾向感知手段で感知した情報をもとに該移動式スケール成分除去装置を該被処理水系に送り出す制御手段と、を備えたことを特徴とする。 The mobile scale component removal system according to the present invention (Claim 5) includes the mobile scale component removal apparatus according to any one of Claims 1 to 4, and a scale deposition tendency for detecting a scale deposition tendency in the water to be treated. It is characterized by comprising sensing means and control means for sending the mobile scale component removing device to the water system to be treated based on information sensed by the scale deposition tendency sensing means.
本発明の移動式スケール成分除去装置によると、被処理水系のある現場に電解処理装置等のスケール成分除去手段を据え置きにすることなく、必要なときにのみ、即ち、被処理水中にスケール成分が蓄積してスケール析出傾向が高くなってきたときにのみ、スケール成分除去手段を搭載した車両を現場に移動させて、被処理水のスケール成分除去処理を行って、循環型冷却水系における熱交換部や冷却塔、ＲＯ膜処理水系におけるＲＯ膜面などへのスケール析出を防止ないし抑制することが可能となる。 According to the mobile scale component removing apparatus of the present invention, the scale component is only present when necessary, that is, without leaving the scale component removing means such as the electrolytic treatment apparatus at the site where the treated water system is present. Only when accumulating and the tendency of scale deposition has increased, move the vehicle equipped with the scale component removal means to the site, perform the scale component removal treatment of the water to be treated, and perform heat exchange in the circulating cooling water system It is possible to prevent or suppress scale deposition on the surface of the RO membrane in the cooling tower, the RO membrane treated water system, or the like.
即ち、前述の如く、被処理水系のスケール成分の除去処理は常時行う必要はなく、被処理水中にスケール成分が蓄積したときにのみ必要に応じて行えば良い。本発明の移動式スケール成分除去装置によれば、被処理水のスケール成分除去処理が必要なときにのみ、移動式スケール成分除去装置を被処理水系の現場に移動させて、被処理水のスケール成分除去処理を行える。このため、現場において、電解処理装置やその配管類等を常設する必要がなく、必要なスペースを低減することができる。また、複数の処理対象水系に対して、一台の移動式スケール成分除去装置で対応することが可能となり、設備費の軽減も可能となる。 That is, as described above, the removal process of the scale component of the water to be treated need not always be performed, and may be performed only when the scale component is accumulated in the water to be treated. According to the mobile scale component removal apparatus of the present invention, the scale of the water to be treated is moved by moving the mobile scale component removal apparatus to the site of the water to be treated only when the scale component removal treatment of the water to be treated is necessary. Component removal processing can be performed. For this reason, it is not necessary to permanently install an electrolytic treatment apparatus and its piping in the field, and a necessary space can be reduced. In addition, it is possible to cope with a plurality of water systems to be treated with a single mobile scale component removing device, and it is possible to reduce equipment costs.
また、従来、現場据え置きの電解処理装置では、被処理水のスケール成分除去処理で、電極に付着したスケールを洗浄または除去するために、酸洗浄や極性反転によるスケール剥離が必要であり、そのための装置や薬品も必要となるが、本発明の移動式スケール成分除去装置では、現場で除去したスケール成分は集中処理センターに持ち帰って処理することができるため、現場での酸洗浄用薬品の購入や危険な搬入作業が無くなり、薬品コストの削減、安全性の向上が図れる。 Conventionally, in the electrolytic treatment apparatus installed on the site, in order to clean or remove the scale attached to the electrode in the removal of the scale component of the water to be treated, it is necessary to remove the scale by acid cleaning or polarity reversal. Equipment and chemicals are also required, but with the mobile scale component removal device of the present invention, the scale components removed on site can be brought back to the central processing center for processing. Dangerous loading work is eliminated, chemical costs can be reduced, and safety can be improved.
また、本発明の移動式スケール成分除去システムによれば、スケール析出傾向感知手段によって自動的に被処理水系のスケール成分除去時期を判断し、このような本発明の移動式スケール成分除去装置に移動指令信号を出力し、必要に応じてスケール成分除去処理を行うことができる。 Further, according to the mobile scale component removal system of the present invention, the scale component removal time is automatically determined by the scale precipitation tendency sensing means, and the mobile scale component removal device of the present invention is moved to such a system. A command signal is output, and scale component removal processing can be performed as necessary.
本発明においては、更に、スケール成分除去手段に供給する被処理水を移動式スケール成分除去装置の外部から導入する被処理水導入手段と、スケール成分除去手段でスケール成分除去処理した水を移動式スケール成分除去装置の外部に送出する処理水送出手段と、スケール成分除去手段を作動させるための電力を移動式スケール成分除去装置の外部から受け入れる電力受入手段、或いは前記スケール成分除去手段を作動させるための電力を該移動式スケール成分除去装置の内部で発生させるか、蓄電している電源とを備えることが好ましく（請求項２）、更に、スケール成分除去手段で被処理水中から除去したスケール成分をスケールとして貯留するスケール貯留手段と、このスケール貯留手段内のスケールを移動式スケール成分除去装置の外部へ排出するスケール排出手段と、を備えたことが好ましい（請求項３）。 In the present invention, the water to be treated to be supplied to the scale component removing means is further introduced from the outside of the mobile scale component removing device, and the water subjected to the scale component removing treatment by the scale component removing means is mobile. Treated water delivery means for delivering to the outside of the scale component removing device, power receiving means for receiving electric power for operating the scale component removing device from the outside of the mobile scale component removing device, or for operating the scale component removing means The scale component removed from the water to be treated by the scale component removing means is preferably provided. Scale storage means for storing as a scale, and mobile scale component removing device for moving the scale in the scale storage means It is preferred with a scale discharge means for discharging to the outside, a (claim 3).
また、スケール成分除去手段としては、特願２００４−２８４４８９号に記載されるような電解処理装置が好ましい（請求項４）。 Moreover, as a scale component removal means, the electrolytic processing apparatus as described in Japanese Patent Application No. 2004-284489 is preferable (Claim 4).
以下、図面を参照して本発明の移動式スケール成分除去装置およびシステムの実施の形態について詳細に説明する。 Embodiments of a mobile scale component removing apparatus and system according to the present invention will be described below in detail with reference to the drawings.
図１は実施の形態に係る移動式スケール成分除去装置としてのスケール成分除去車の側面図、図２はこのスケール成分除去車を設置したときの被処理水系のフロー図である。 FIG. 1 is a side view of a scale component removing vehicle as a mobile scale component removing device according to an embodiment, and FIG. 2 is a flow diagram of a water system to be treated when the scale component removing vehicle is installed.
このスケール成分除去車１０は、図１の通り、トラック１の荷台上に固定されたコンテナ２内に、電源装置３、電解処理装置４およびスケール貯留部５が設置されている。この電源装置３には、現場において商用電源から電力を供給しても、予め必要な電力を充電しておいても良い。特に、夜間電力を用いることで、電力費を抑えることが可能である。電解処理装置４は複層式の電解槽である。
本発明において、スケール成分除去手段は電解処理装置が好ましいが、晶析カラム等、電解によるもの以外のものであっても良い。
符号６はアウトリガーを示す。
As shown in FIG. 1, the scale component removal vehicle 10 includes a power supply device 3, an electrolytic treatment device 4, and a scale storage unit 5 in a container 2 fixed on the loading platform of the truck 1. The power supply device 3 may be supplied with electric power from a commercial power source on site or may be charged with necessary electric power in advance. In particular, it is possible to reduce power costs by using nighttime power. The electrolytic treatment apparatus 4 is a multilayer electrolytic cell.
In the present invention, the scale component removing means is preferably an electrolytic treatment apparatus, but it may be other than electrolysis, such as a crystallization column.
Reference numeral 6 denotes an outrigger.
図２において、２０はビルなどの処理対象現場であり、１１は熱交換器、１２は循環ポンプ、１３は冷却塔、１４は循環ラインである。冷却塔１３内にはｐＨ計等のスケール析出傾向感知センサー１７が設けられている。 In FIG. 2, 20 is a site to be treated such as a building, 11 is a heat exchanger, 12 is a circulation pump, 13 is a cooling tower, and 14 is a circulation line. In the cooling tower 13, a scale precipitation tendency detection sensor 17 such as a pH meter is provided.
図１のスケール成分除去車１０をこのような循環型冷却水の処理に用いる場合、スケール成分除去車１０を現場２０に移動させ、スケール成分除去車１０の電解処理装置４に循環型冷却水系の冷却水を送り込む。この場合、循環型冷却水系のいずれの箇所から被処理水導入配管を組んでも構わず、冷却塔１３の水面下に配管ホースを挿入した状態でも構わない。いずれの場合も取水方法は何ら限定されるものではないが、図２のように冷却塔１３よりポンプ（図示せず）を用いてスケール成分除去車１０の電解処理装置４に冷却水を導入することが望ましい。 When the scale component removal vehicle 10 of FIG. 1 is used for the treatment of such circulating cooling water, the scale component removal vehicle 10 is moved to the site 20, and the electrolytic treatment device 4 of the scale component removal vehicle 10 is connected to the circulating cooling water system. Feed cooling water. In this case, the treated water introduction pipe may be assembled from any part of the circulating cooling water system, or a pipe hose may be inserted under the water surface of the cooling tower 13. In any case, the water intake method is not limited in any way, but the cooling water is introduced from the cooling tower 13 into the electrolytic treatment apparatus 4 of the scale component removal vehicle 10 by using a pump (not shown) as shown in FIG. It is desirable.
図２では、冷却塔１３内のスケール析出傾向感知センサー１７が、スケールの析出傾向にあることを感知すると、図示しない集中管理センサーに「スケール成分除去処理・要」の信号を発信する。集中管理センサーでは、この信号を受けてスケール成分除去車の発動指令を出力し、スケール成分除去車を現場に出向させる。スケール成分除去車１０をビルなどの処理対象の冷却塔１３の近傍に移動させて停車させ、スケール析出を目的とした電解処理装置４に冷却塔１３内の冷却水を取水ライン１５から流入させて電解処理した後、電解処理水を返送ライン１６により冷却塔１３に戻す。この間に、電解処理装置４の陽・陰極間に電源装置３で電圧を印加して通電すると、冷却水中のスケール成分の一部が電極上に析出して、スケール成分を除去することができ、熱交換器１１、冷却塔１３へのスケール付着を防止することができる。 In FIG. 2, when the scale deposition tendency detecting sensor 17 in the cooling tower 13 senses that there is a scale deposition tendency, a signal “scale component removal processing / necessary” is transmitted to a centralized management sensor (not shown). In response to this signal, the central control sensor outputs an activation command for the scale component removal vehicle and sends the scale component removal vehicle to the site. The scale component removal vehicle 10 is moved to the vicinity of the cooling tower 13 to be treated such as a building and stopped, and the cooling water in the cooling tower 13 is caused to flow from the water line 15 to the electrolytic treatment apparatus 4 for the purpose of scale deposition. After the electrolytic treatment, the electrolytic treatment water is returned to the cooling tower 13 through the return line 16. During this time, when a voltage is applied between the positive and negative electrodes of the electrolytic treatment apparatus 4 with the power supply device 3, a part of the scale component in the cooling water is deposited on the electrode, and the scale component can be removed. Scale adhesion to the heat exchanger 11 and the cooling tower 13 can be prevented.
冷却水のスケール成分除去処理を施していない系では、冷却水中のカルシウム硬度を１００〜１２０ｍｇ−ＣａＣＯ３／Ｌ程度で管理することが望ましいことから、循環冷却水のカルシウム硬度が１２０ｍｇ−ＣａＣＯ３／Ｌを超える場合は、スケール析出傾向感知センサー１７で水質異常を感知して自動的に情報を発信し、スケール成分除去車１０を配置させることが望ましい。
また、本発明によるスケール成分除去の際は、スケール成分が析出しない過飽和に近い濃度でスケール成分を残存させておくことで、系内配管や熱交換器への腐食速度の低減が可能となる。例えば、循環型冷却水中のカルシウム硬度は冷却水系の熱交換部や配管、冷却塔の充填材などにスケールを析出させない８０〜１２０ｍｇ−ＣａＣＯ３／Ｌで運転することが望ましく、同様にＭアルカリ度を８０〜１２０ｍｇ−ＣａＣＯ３／に制御して、飽和指数ＬＳＩは０．５〜１．０程度となるようにすることが好ましい。
In not subjected to cooling water scale component removal process of the system, since it is desirable to manage the calcium hardness of the cooling water at 100~120mg-CaCO 3 / L about, calcium hardness of the circulating cooling water is 120 mg-CaCO 3 / When L is exceeded, it is desirable that the scale deposition tendency detection sensor 17 senses a water quality abnormality and automatically transmits information to arrange the scale component removal vehicle 10.
Further, when removing the scale component according to the present invention, it is possible to reduce the corrosion rate of the piping in the system and the heat exchanger by leaving the scale component at a concentration close to supersaturation where the scale component does not precipitate. For example, the calcium hardness in the circulating cooling water is preferably 80 to 120 mg-CaCO 3 / L, which does not cause the scale to precipitate in the heat exchange section and piping of the cooling water system, the filler of the cooling tower, and the like. Is controlled to 80 to 120 mg-CaCO 3 /, and the saturation index LSI is preferably about 0.5 to 1.0.
必要量のスケールを析出させた後は、電極上の析出スケールを除去する工程に移る。この除去方法は、特に限定はしないが、超音波剥離が好ましく、そこで剥離したスケールはスケール貯留部５に一時的に貯めておくことが出来る。ここで、貯留したスケールは固体として産廃処理場に運ぶか、酸溶解して廃水処理するかはいずれでも良い。 After depositing the necessary amount of scale, the process proceeds to a step of removing the deposited scale on the electrode. The removal method is not particularly limited, but ultrasonic peeling is preferable, and the scale peeled there can be temporarily stored in the scale reservoir 5. Here, the stored scale may be transported as a solid to an industrial waste treatment plant, or may be dissolved in an acid and treated with waste water.
必要に応じて、上記電解処理装置の電極上へのスケール析出によるスケール成分除去処理とスケール剥離処理とを交互に行って、必要量のスケール成分を除去することができる。 If necessary, a necessary amount of scale component can be removed by alternately performing a scale component removing process and a scale peeling process by depositing scale on the electrode of the electrolytic treatment apparatus.
なお、このスケール剥離処理は、現場にて行っても良く、スケール成分除去車１０を他の処理場に移動させてから行っても良い。スケール剥離を現場で行う場合には、スケール成分除去車１０にはスケール貯留部と、スケール剥離のための超音波装置等の手段が搭載されている必要があるが、他の処理場でスケール剥離を行う場合には、これらは不要である。 In addition, this scale peeling process may be performed on-site, and may be performed after moving the scale component removal vehicle 10 to another processing place. When scale peeling is performed on site, the scale component removal vehicle 10 needs to be equipped with a scale storage unit and means such as an ultrasonic device for scale peeling. These are not necessary when performing.
このような本発明の移動式スケール成分除去装置は、循環型冷却水に限らず、ＲＯブライン水系などのスケール障害が問題となる被処理水の処理に好適である。 Such a mobile scale component removing apparatus of the present invention is suitable not only for circulating cooling water but also for treatment of water to be treated where scale failure such as RO brine water system becomes a problem.
処理対象とする冷却水系やＲＯブライン水には、ｐＨ計などのスケール析出傾向感知手段を設け、常時もしくは間欠的に水質のモニタリングを行い、被処理水中のスケール成分濃度が高くなって、スケール成分除去が必要となった場合には、自動的に集中管理センサーに情報を発信することで、自動的に処理対象現場へ移動式スケール成分除去車を配車するようにすることが好ましい。このスケール析出傾向感知手段の設置は必須ではなく、スケール析出傾向の確認は人為的に行われてもよいが、望ましくは自動感知が良い。 The cooling water system and RO brine water to be treated are provided with a scale precipitation tendency sensing means such as a pH meter to monitor the water quality constantly or intermittently, and the scale component concentration in the water to be treated becomes high. When removal is necessary, it is preferable that the mobile scale component removal vehicle is automatically dispatched to the site to be processed by automatically transmitting information to the central control sensor. The installation of the scale deposition tendency sensing means is not indispensable, and the confirmation of the scale deposition tendency may be performed artificially, but automatic sensing is desirable.
１ トラック
２ コンテナ
３ 電源装置
４ 電解処理装置
５ スケール貯留部
６ アウトリガー
１０ スケール成分除去車
１１ 熱交換器
１２ 循環ポンプ
１３ 冷却塔
１４ 循環ライン
１５ 取水ライン
１６ 返送ライン
１７ スケール析出傾向感知センサー
２０ ビルなどの処理対象対象
DESCRIPTION OF SYMBOLS 1 Truck 2 Container 3 Power supply device 4 Electrolytic processing apparatus 5 Scale storage part 6 Outrigger 10 Scale component removal vehicle 11 Heat exchanger 12 Circulation pump 13 Cooling tower 14 Circulation line 15 Intake line 16 Return line 17 Scale deposition tendency detection sensor 20 Building etc. Target of processing
Claims (5)
前記スケール成分除去手段でスケール成分除去処理した水を該移動式スケール成分除去装置の外部に送出する処理水送出手段と、
前記スケール成分除去手段を作動させるための電力を該移動式スケール成分除去装置の外部から受け入れる電力受入手段、或いは前記スケール成分除去手段を作動させるための電力を該移動式スケール成分除去装置の内部で発生させるか、蓄電している電源と、
を備えたことを特徴とする移動式スケール成分除去装置。 In Claim 1, The to-be-processed water introduction means which introduces the to-be-processed water supplied to the said scale component removal means from the exterior of this mobile scale component removal apparatus,
Treated water delivery means for delivering water that has undergone scale component removal treatment by the scale component removal means to the outside of the mobile scale component removal device;
Power receiving means for receiving power for operating the scale component removing means from outside the mobile scale component removing apparatus, or power for operating the scale component removing means within the mobile scale component removing apparatus. Generating or storing a power source,
A mobile scale component removing apparatus comprising:
該スケール貯留手段内のスケールを該移動式スケール成分除去装置の外部へ排出するスケール排出手段と、
を備えたことを特徴とする移動式スケール成分除去装置。 In Claim 1 or 2, the scale storing means for storing the scale component removed from the water to be treated by the scale component removing means as a scale,
Scale discharging means for discharging the scale in the scale storage means to the outside of the mobile scale component removing device;
A mobile scale component removing apparatus comprising:
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| CN114644373A (en) * | 2020-12-18 | 2022-06-21 | 格兰富控股联合股份公司 | Control system and method for inhibiting biological growth, fouling and/or corrosion in a recirculating evaporative cooling apparatus |
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| CN114644373A (en) * | 2020-12-18 | 2022-06-21 | 格兰富控股联合股份公司 | Control system and method for inhibiting biological growth, fouling and/or corrosion in a recirculating evaporative cooling apparatus |
| CN114644373B (en) * | 2020-12-18 | 2024-06-11 | 格兰富控股联合股份公司 | Control system and method for inhibiting biological growth, fouling and/or corrosion in a recirculating evaporative cooling device |
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