シリカの析出抑制方法。【請求項５】 水に溶解しているシリカを凝集するた

シリカの析出抑制方法。
【請求項５】
水に溶解しているシリカを凝集するための方法であって、
請求項３に記載のシリカの凝集剤を前記水に添加する工程を含む、
シリカの凝集方法。
【請求項６】
水に溶解しているシリカを分離するための方法であって、
請求項３に記載のシリカの凝集剤を前記水に添加する工程１と、
工程１において生成した凝集物を前記水から分離する工程２と、
を含むシリカの分離方法。
【発明の詳細な説明】
【技術分野】
【０００１】
本発明は、シリカ処理剤、特に、水に溶解しているシリカの処理剤に関する。
【背景技術】
【０００２】
シリカなどの溶解成分を含む天然水、例えば、湖沼水、河川水または地下水を取水原と
する水道水や工業用水を給水用や循環用の用水として用いるボイラやクーリングタワーは
、用水と触れる箇所においてシリカスケールが生成し、これが熱交換等の諸機能の低下の
原因となる。そこで、ボイラやクーリングタワーに供給する用水は、逆浸透膜装置などの
膜分離装置を用いて処理し、シリカなどの溶解成分を除去しているが、この場合は膜分離
装置においてシリカスケールが生成し、それが膜分離装置の機能低下をもたらす。
【０００３】
したがって、ボイラやクーリングタワー或いは膜分離装置に供給する用水は、シリカス
ケールの生成を抑制するための処理が求められる。
【０００４】
シリカスケールの生成を抑制する方法として、用水においてシリカの析出を抑制する方
法と、用水からシリカを除去する方法との、二通りの方法が知られている。前者の方法は
、用水中でのシリカの溶解性を高め、それによってシリカの析出を抑制しようとするもの
である。例えば、特許文献１は、シリカスケールの生成を抑制するために、アミノトリス
メチレンホスホン酸や１－ヒドロキシ－エチリデン－１，１－ジホスホン酸といったホス
ホン酸系の処理剤を用水に添加することで用水中でのシリカの分散性（溶解性）を高めて
いる。
【０００５】
しかし、水に溶解しているシリカはｐＨ８以下の環境下で析出しやすく、特許文献１に
記載の方法においても用水がｐＨ８以下のときはシリカの析出を抑制するのが困難である
。特に、各種の用水は、通常、シリカスケールの抑制以外の目的で各種の薬剤を添加する
ことが多く、その薬剤の影響によりｐＨが低下することがあるため、用水のｐＨがシリカ
の析出抑制に影響すれば実用性を欠くことになる。
【０００６】
一方、後者の方法は、用水中でシリカを凝集させ、その凝集物を用水から分離すること
でシリカスケールの原因となるシリカを用水から除去しようとするものである。例えば、
特許文献２は、用水に強カチオン性の高分子凝集剤を添加することで用水に溶解している
シリカを凝集させ、これを捕集して用水から分離している。
【０００７】
しかし、特許文献２に記載の方法は、高分子凝集剤を添加してからシリカが凝集し始め
るのに数時間程度を要することから、結果的に用水からシリカを除去するのに長時間を要
し、実用性を欠く。
【先行技術文献】
【特許文献】

Risultati (Inglese) 1:

Silica precipitation suppression.[Bill 5] Methods for aggregation of silica is dissolved in water in the Process in silica coagulant addition above water to claim 3, including theAggregation of silica.[Bill 6] Method for separating the silica is dissolved in water Stage 1 claim 3 in silica coagulant addition above water and And separating wherein water from aggregation of produced in stage 1 stage 2Separation method of silica.[Detailed description of the invention][Technology][0001] The invention relates to the silica is dissolved silica processing agents, in particular, water treatment agent.[Background technology][0002] Raw water intake with mineral water containing dissolved ingredients such as silica, for example, water, river water or groundwaterCooling tower, boiler water and circulating water with tap water and water for industrial useThe produced silica scale where they touch the water and this decrease in various functions such as heat exchangersMay cause. Water supplying boiler, cooling tower, there are, such as reverse osmosis equipmentThis membrane separation and processing using membrane separation equipment, removing soluble elements such as silica,Generates a silica scale in the system, it will bring a decline of membrane separation equipment.[0003] Therefore, the water supply to the boiler, cooling tower or membrane separation equipment is silicaRequire in order to suppress the generation of a Caledon.[0004] As a way to suppress the formation of silica scale to suppress precipitation of silica in water2 ways how to remove silica from the law and water and is known. The former approach isThe increased solubility of silica in the water and thereby discourage the deposition of silicaIs in. For example, patent documents 1 to curb the formation of silica scaling in amino TRISHoth 1 - Hydroxy - ethylidene - 1, 1 - diphosphonic acid, methylene phosphonic acidEnhance the dispersibility of the silica in water (soluble) by Hong acid chemicals added to waterThere are.[0005] However, silica is dissolved in water and deposited under ph8 to patent literature 1In the described way inhibits the deposition of silica ph8 when water is difficult。 In particular, various types of water is usually addition various drugs for purposes other than the control of silica scalesFor there is often the effect of drug reduces pH water pH silica.Of going to lack utility if it affects the precipitation suppression.[0006] On the other hand, the latter made cohesive silica in the water, separating water from the aggregation ofIn trying to remove from the water for silica and silica scale due to. For example, thePatent literature 2, with strong cationic polymeric flocculant addition of water dissolved in waterIs silica, trapping it is separated from the water.[0007] However, silica started and aggregation from the method of the polymer flocculant addition of patent literature 2To take a few hours and then ultimately to eliminate silica from water which for a long time.And the lack of usefulness.[Prior art documents][Documents]

Risultati (Inglese) 2:

Method of inhibiting the deposition of silica.
5.
A method for agglomerating the silica dissolved in water,
comprising the step of adding silica flocculant as claimed in claim 3 to the water,
the silica method of agglomeration.
6.
A method for separating silica dissolved in water,
the step 1 of adding silica flocculant as claimed in claim 3 to the water,
the agglomerates produced in step 1 , and step 2 to separate from the water
separation method of silica, including.
BACKGROUND OF THE INVENTION
[Technical Field]
[0001]
The present invention, silica processing agent, in particular, relating to the processing agent of silica dissolved in the water.
BACKGROUND ART
[0002]
natural water containing dissolved components such as silica, for example, lake water, and Suwon retrieve the river water or ground water
boilers and cooling tower using the tap water and industrial water to be as water for the water supply and circulation
, silica scale is produced in places that touch the water, this is a reduction of various functions of the heat exchange, etc.
cause. Therefore, water supplied to the boiler or cooling tower, such as reverse osmosis unit
and treated with a membrane separation unit, although removal of the dissolved components such as silica, in this case membrane separation
silica scale is generated in the device , it results in a functional decline of the membrane separation apparatus.
[0003]
Therefore, the water supply to the boiler and cooling tower, or membrane separation device, Shirikasu
processing in order to suppress the formation of scale is required.
[0004]
As a method of suppressing the formation of silica scale, How to suppress the precipitation of silica in water
and method, and a method of removing the silica from the water, two ways are known. The former method
increases the solubility of silica in water, which thereby attempts to suppress the precipitation of the silica
is. For example, Patent Document 1, in order to suppress the formation of silica scale, amino tris
methylene phosphonic acid and 1-hydroxy - 1,1-phosphonic such diphosphonic acid
by adding acid-based treatment agent to water enhance dispersibility of silica in water (the solubility)
are.
[0005]
However, silica dissolved in the water easily precipitated under pH8 following environment, in Patent Document 1
is difficult to suppress the precipitation of the silica when even water is pH8 following Method according
. In particular, various water is usually added to various drugs for purposes other than inhibition of silica scale
often, since there is the pH is lowered by the influence of the agent, pH of the water is silica
in suppressing precipitation of if impact would lack practical utility.
[0006]
On the other hand, the latter method is to agglomeration of silica in water, separating the agglomerates from the water
is intended to remove the silica that causes silica scale from water in. For example,
Patent Document 2 is dissolved in water by adding strong cationic polymeric flocculant in water
to coagulate the silica is separated from the water by collecting it.
[0007]
However, the method described in Patent Document 2, silica after the addition of polymeric flocculant begins to agglomerate
since it takes several hours to that, for removing silica from resulting in water a long period of time required for
, and lack practicality.
[Prior art]
[Patent Document]

Risultati (Inglese) 3:

Method for inhibiting deposition of silica.(5).For the purpose of being dissolved in water, silica aggregation methodThe third aspect includes coagulant addition process of silica in waterAggregation method of silica.(6).For the purpose of dissolved in water, and method for separating silicaThe third aspect of the coagulant is added to the process of silica, and waterIn step 1 is separated from the water generated in step 2, and aggregatesMethod for separating silica.The detailed description of the present invention.The technical field.(0001).According to the present invention, the silica treatment agent, in particular, the invention relates to the processing agent are dissolved in water.Technology background."0002.Silica dissolution of components including, for example, natural water, lake water, river water and ground water or water sourceCooling tower water and boiler water and industrial water use and water circulation and water is used forTouch the water generated in the silica scales, this is the function of heat exchange and the likeCause. Therefore, the water is supplied to the boiler and cooling tower, the reverse osmosis unit, etc.Treatment using membrane separation device, such as a silica to remove dissolved component, membrane separationThe device is produced in the silica scales, it leads to decreased function of membrane separation device."0003"Therefore, the water supplied to the cooling tower or a membrane separation device and a boiler, CASSTreatment is required for suppressing the generation of scale."0004"As a method for suppressing the formation of silica scale in silica precipitation in waterThe method and the method of removing silica from the water, and the two methods are known. The former methodThe solubility of silica in water, to try to curb it by silica precipitation. For example, in patent document 1, in order to suppress the formation of silica scale amino TrisMethylene phosphonic acid or hydroxy ethylidene 1 -- 1 -- 1 ， such as diphosphonic acidThe dispersion of silica in water in a water treatment agent is added to the acid system (soluble) increase."0005.However, dissolved in water pH silica precipitation under the environment of less than 8, in patent document 1In the method, it is difficult to reduce the deposition of silica pH 8 when the water. In particular, the various kinds of water, usually added to other than the purpose of silicaFor many, it may be due to the influence of the drug pH decreases, water pH silicaLack of practicability and effect on precipitation.That dress.On the other hand, in the latter case, the agglomeration of silica in water, can be separated from the water that aggregatesSilica and silica scale to be removed from the water. For example, theThe patent document 2, strong cationic high molecular flocculant is added to the water to dissolve in the waterAggregation of silica, this collection is separated from the water."0007.However, the method disclosed in the patent document 2, the high molecular coagulant began after the addition of silica aggregatesFrom that time, the number of required, resulting in a long time to remove water from the main silicaThe lack of practicality.The advanced technology.In the patent document.