JP2008156700A - Condensed water treatment agent - Google Patents

Condensed water treatment agent Download PDF

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JP2008156700A
JP2008156700A JP2006346449A JP2006346449A JP2008156700A JP 2008156700 A JP2008156700 A JP 2008156700A JP 2006346449 A JP2006346449 A JP 2006346449A JP 2006346449 A JP2006346449 A JP 2006346449A JP 2008156700 A JP2008156700 A JP 2008156700A
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acid
boiler
steam
treatment agent
condensate
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Takeshi Yoneda
剛 米田
Junichi Nakajima
純一 中島
Takanari Kume
隆成 久米
Junichi Kato
潤一 加藤
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Miura Co Ltd
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Priority to PCT/JP2007/073660 priority patent/WO2008078532A1/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F14/00—Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes
    • C23F14/02—Inhibiting incrustation in apparatus for heating liquids for physical or chemical purposes by chemical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/025—Devices and methods for diminishing corrosion, e.g. by preventing cooling beneath the dew point

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  • Mechanical Engineering (AREA)
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  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a one liquid type condensed water treatment agent capable of feeding proper amounts of a film forming agent and a pH regulator when corrosion caused in a boiler device is suppressed. <P>SOLUTION: The condensed water treatment agent is fed to a boiler device 1 provided with: a boiler 2 for heating feed water and generating vapor; a water feeding part 3 for feeding feed water to the boiler 2; a vapor feeding part 5 for feeding the vapor generated in the boiler 2 to a loading apparatus 4; and a condensed water feeding part 6 for feeding the vapor used in the loading apparatus 4 to the water feeding part 3 as a condensate so as to suppress corrosion caused in the boiler device 1, and comprises: 10-18C fatty acid or the amine salt thereof; and counteractive amine. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ボイラ装置の腐食抑制用の復水処理剤に関し、特にボイラで発生した蒸気が凝縮して得られる復水をボイラ用の給水として再利用するボイラ装置に発生する腐食を抑制するために用いられる復水処理剤に関する。   The present invention relates to a condensate treatment agent for suppressing corrosion of a boiler device, and particularly to suppress corrosion generated in a boiler device that reuses condensate obtained by condensing steam generated in a boiler as feed water for the boiler. Condensate treatment agent used for

ボイラからの蒸気が凝縮して得られる復水をボイラ用の給水として再利用するボイラ装置は、復水を回収して給水系に混合するための復水配管，給水をボイラへ供給するための給水配管およびボイラで発生した蒸気を負荷装置等へ供給するための蒸気配管として、主として鋼管を利用している。このため、かかるボイラ装置においては、運転期間の長期化に伴って、復水配管や蒸気配管内に腐食が生じる場合がある。   A boiler device that reuses the condensate obtained by condensing steam from the boiler as feed water for the boiler is a condensate pipe for collecting the condensate and mixing it with the feed water system, for supplying the feed water to the boiler Steel pipes are mainly used as steam pipes for supplying steam generated in water supply pipes and boilers to load devices and the like. For this reason, in such a boiler device, corrosion may occur in the condensate piping and the steam piping as the operation period becomes longer.

復水配管等の腐食は、主に復水や給水中の炭酸ガスや溶存酸素の影響により生じる。炭酸ガスを原因とする腐食は、ボイラ装置内において、炭酸水素イオンなどのＭアルカリ成分を含む給水の熱分解により生成する炭酸ガスが復水に溶解し、復水のｐＨを低下させることにより生じるものであり、復水と接触している配管の内面部分に均等に進行して配管の減肉をもたらす。また、溶存酸素を原因とする腐食は、給水中に含まれる溶存酸素が蒸気とともに各配管に供給されること等により生じるものである。   Corrosion of condensate piping and the like is mainly caused by the influence of carbon dioxide and dissolved oxygen in condensate and feed water. Corrosion caused by carbon dioxide gas occurs when carbon dioxide gas generated by thermal decomposition of feed water containing M alkali components such as hydrogen carbonate ions dissolves in the condensate and lowers the pH of the condensate in the boiler device. It progresses evenly to the inner surface of the pipe that is in contact with the condensate, resulting in pipe thinning. Corrosion caused by dissolved oxygen is caused by the dissolved oxygen contained in the feed water being supplied to each pipe together with steam.

従来から、ボイラ装置においては、上記各原因に基づく腐食を効果的に抑制するため、復水処理剤として皮膜形成剤とｐＨ調整剤とを併用している。かかる２種類の薬剤を用いてボイラ装置を運転する場合、それぞれの薬剤を別々の薬注装置を用いて個別に供給する方法があるが、かかる方法では、別々の薬注装置を配設する必要があるためボイラ装置自体が高価になる，各薬剤の供給作業や在庫をそれぞれ個別に管理する必要があるため、ボイラ装置の運転に伴う管理作業も複雑になる等の問題点がある。   Conventionally, in a boiler apparatus, a film forming agent and a pH adjuster are used in combination as a condensate treatment agent in order to effectively suppress corrosion based on the above causes. When operating a boiler apparatus using these two kinds of medicines, there is a method of supplying each medicine individually using separate medicine injection apparatuses. In such a method, it is necessary to dispose separate medicine injection apparatuses. Therefore, there is a problem that the boiler apparatus itself becomes expensive, and it is necessary to individually manage the supply work and stock of each medicine, so that the management work associated with the operation of the boiler apparatus becomes complicated.

そこで、ボイラ装置にモルホリン脂肪酸塩の水分散液を供給し、該モルホリン脂肪酸塩を脂肪酸（皮膜形成剤）とモルホリン（ｐＨ調整剤）に熱分解させる方法が提案されている（特許文献１参照）。   Therefore, a method has been proposed in which an aqueous dispersion of a morpholine fatty acid salt is supplied to a boiler device, and the morpholine fatty acid salt is thermally decomposed into a fatty acid (film forming agent) and morpholine (pH adjusting agent) (see Patent Document 1). .

特開２００４−８５１１４号公報JP 2004-85114 A

しかし、本発明者らの検討によれば、特許文献１記載の方法では、給水中の溶存酸素濃度が増えたときに、復水配管内や蒸気配管内での皮膜形成を促進させるため、皮膜基準でモルホリン脂肪酸塩を供給した場合、ボイラ水中の薬剤濃度が高くなり、キャリーオーバーによって、蒸気の品質が低下してしまう不都合があることが判明した。一方、給水中のＭアルカリ成分濃度が増えたときに、復水配管内や蒸気配管内での中和を促進させるため、ｐＨ基準でモルホリン脂肪酸塩を供給した場合、ボイラ水中の脂肪酸濃度が高くなり、キャリーオーバーによって、蒸気の品質が低下してしまう不都合があることが判明した。   However, according to the study by the present inventors, in the method described in Patent Document 1, when the dissolved oxygen concentration in the feed water increases, the film formation is promoted in the condensate pipe or the steam pipe. When the morpholine fatty acid salt is supplied on the basis, it has been found that there is a disadvantage that the chemical concentration in the boiler water becomes high and the quality of the steam is lowered by carryover. On the other hand, when morpholine fatty acid salt is supplied on the basis of pH to promote neutralization in the condensate pipe or steam pipe when the concentration of M alkali component in the feed water increases, the fatty acid concentration in boiler water is high. Thus, it has been found that there is an inconvenience that the quality of the steam deteriorates due to carry-over.

本発明は上記事情に鑑みてなされたものであり、その目的は、ボイラ装置に発生する腐食を抑制するにあたり、皮膜形成剤とｐＨ調整剤とを適正量供給することができる１液型の復水処理剤を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a one-pack type recovery agent capable of supplying an appropriate amount of a film forming agent and a pH adjusting agent in suppressing corrosion occurring in a boiler device. It is to provide a water treatment agent.

すなわち、本発明の要旨は以下のとおりである。
〔１〕 給水を加熱して蒸気を生成するボイラと、このボイラへ給水を供給する給水部と、前記ボイラで生成した蒸気を負荷機器へ供給する蒸気供給部と、前記負荷機器で使用した蒸気を復水として前記給水部へ供給する復水供給部とを備えたボイラ装置に供給して、前記ボイラ装置に発生する腐食を抑制するために用いられる復水処理剤であって、炭素数１０〜１８の脂肪酸またはそのアミン塩と、中和性アミンとを含有することを特徴とする復水処理剤、
〔２〕 炭素数１０〜１８の脂肪酸が、酪酸，カプロン酸，カプリル酸，カプリン酸，ラウリン酸，ミスチリン酸，パルミチン酸，ステアリン酸，オレイン酸，リノール酸，リノレン酸，リシノレン酸，アラキジン酸，エイコセン酸，ベヘン酸，エルシン酸およびリグノセリン酸からなる群より選ばれる少なくとも１種である、前記〔１〕記載の復水処理剤、
〔３〕 炭素数１０〜１８の脂肪酸のアミン塩が該脂肪酸のモルホリン塩である、前記〔１〕または〔２〕記載の復水処理剤、
〔４〕 中和性アミンが、２−アミノ−２−メチル−１−プロパノール，シクロヘキシルアミン，ジシクロヘキシルアミン，ジエタノールアミン，ジエチルアミノエタノール，ジエチルヒドロキシルアミン，２−ジメチルアミノエタノール，ジメチルイソプロパノールアミン，３−メトキシ−ｎ−プロピルアミン，２−アミノエタノール，モルホリンおよび１−アミノ−２−プロパノールからなる群より選ばれる少なくとも１種である、前記〔１〕〜〔３〕のいずれかに記載の復水処理剤。 That is, the gist of the present invention is as follows.
[1] A boiler that generates steam by heating feed water, a water supply unit that supplies water to the boiler, a steam supply unit that supplies steam generated by the boiler to load equipment, and steam used in the load equipment Is a condensate treatment agent that is used to suppress corrosion that occurs in the boiler device, and is provided with a condensate supply unit that supplies the condensate as condensate to the water supply unit. A condensate treatment agent comprising -18 fatty acids or amine salts thereof, and a neutralizing amine,
[2] A fatty acid having 10 to 18 carbon atoms is butyric acid, caproic acid, caprylic acid, capric acid, lauric acid, mytilic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, ricinolenic acid, arachidic acid, The condensate treatment agent according to the above [1], which is at least one selected from the group consisting of eicosenoic acid, behenic acid, erucic acid and lignoceric acid,
[3] The condensate treatment agent according to [1] or [2], wherein the amine salt of a fatty acid having 10 to 18 carbon atoms is a morpholine salt of the fatty acid,
[4] The neutralizing amine is 2-amino-2-methyl-1-propanol, cyclohexylamine, dicyclohexylamine, diethanolamine, diethylaminoethanol, diethylhydroxylamine, 2-dimethylaminoethanol, dimethylisopropanolamine, 3-methoxy- The condensate treatment agent according to any one of [1] to [3], which is at least one selected from the group consisting of n-propylamine, 2-aminoethanol, morpholine and 1-amino-2-propanol.

本発明によれば、ボイラ装置に発生する腐食を抑制するにあたり、炭素数１０〜１８の脂肪酸またはそのアミン塩と中和性アミンとを含有する１液型の復水処理剤をボイラ装置へ供給するので、皮膜形成剤（脂肪酸）とｐＨ調整剤（中和性アミン，脂肪酸のアミン塩が熱分解して形成されるアミン成分）を適正量供給することができる。   According to the present invention, in order to suppress corrosion occurring in a boiler apparatus, a one-pack type condensate treatment agent containing a fatty acid having 10 to 18 carbon atoms or an amine salt thereof and a neutralizing amine is supplied to the boiler apparatus. Therefore, an appropriate amount of a film forming agent (fatty acid) and a pH adjusting agent (neutralizing amine, amine component formed by thermal decomposition of fatty acid amine salt) can be supplied.

図１を参照して、本発明を適用したボイラ装置の一例を説明する。図１において、ボイラ装置１は、給水を加熱して蒸気を生成するボイラ２と、このボイラ２へ給水を供給する給水装置３（給水部の一例）と、ボイラ２で生成した蒸気を負荷機器４等へ供給する蒸気供給装置５（蒸気供給部の一例）と、負荷機器４で使用した蒸気を復水として給水装置３へ供給する復水配管６（復水供給部の一例）と、復水処理剤を給水装置３へ供給する薬剤供給装置７とを主に備えている。   An example of a boiler apparatus to which the present invention is applied will be described with reference to FIG. In FIG. 1, a boiler apparatus 1 includes a boiler 2 that heats feed water to generate steam, a water supply apparatus 3 (an example of a water supply unit) that supplies the boiler 2 with feed water, and steam generated by the boiler 2 as load equipment. 4, a steam supply device 5 (an example of a steam supply unit), a condensate pipe 6 (an example of a condensate supply unit) that supplies steam used in the load device 4 to the water supply device 3 as condensate, A chemical supply device 7 for supplying a water treatment agent to the water supply device 3 is mainly provided.

給水装置３は、ボイラ２へ給水するために、補給水の注水路８と、この注水路８からの補給水を貯留する給水タンク９と、この給水タンク９に貯留された給水をボイラ２へ供給する給水配管１０とを主に備えている。また、給水配管１０は、給水をボイラ２へ送り出す給水ポンプ１１を備えている。   In order to supply water to the boiler 2, the water supply device 3 supplies the boiler 2 with the makeup water injection path 8, the water supply tank 9 that stores the makeup water from the water injection path 8, and the water supply stored in the water supply tank 9. A supply water pipe 10 to be supplied is mainly provided. In addition, the water supply pipe 10 includes a water supply pump 11 that feeds water to the boiler 2.

蒸気供給装置５は、蒸気ヘッダ１２と、ボイラ２で生成した蒸気を蒸気ヘッダ１２へ供給する蒸気供給管１３と、蒸気ヘッダ１２から分岐する各種の蒸気配管１４，１５，１６を主に備えている。蒸気ヘッダ１２は、ボイラ２で発生した蒸気を各種の負荷機器に分配する母管である。また、第一蒸気配管１４，第二蒸気配管１５および第三蒸気配管１６は、それぞれ負荷機器４や図示しない他の負荷機器に接続されている。   The steam supply device 5 mainly includes a steam header 12, a steam supply pipe 13 that supplies steam generated by the boiler 2 to the steam header 12, and various steam pipes 14, 15, and 16 that branch from the steam header 12. Yes. The steam header 12 is a mother pipe that distributes steam generated in the boiler 2 to various load devices. Moreover, the 1st steam piping 14, the 2nd steam piping 15, and the 3rd steam piping 16 are each connected to the load apparatus 4 and the other load apparatus which is not shown in figure.

負荷機器４は、ボイラ２からの蒸気を用いて所要の熱交換するもの，すなわちボイラ装置１における負荷装置であり、蒸気供給装置５の下流側に接続されている。   The load device 4 is a device that performs required heat exchange using the steam from the boiler 2, that is, a load device in the boiler device 1, and is connected to the downstream side of the steam supply device 5.

薬剤供給装置７は、復水処理剤を貯蔵し、この復水処理剤を蒸気供給装置５へ供給する薬剤タンク１７と、蒸気ヘッダ１２へ連絡する薬剤供給路１８を主に備えている。薬剤供給路１８は、薬剤タンク１７内の復水処理剤を蒸気ヘッダ１２に対して供給する薬注ポンプ１９を備えている。   The chemical supply device 7 mainly includes a chemical tank 17 that stores the condensate treatment agent and supplies the condensate treatment agent to the vapor supply device 5, and a chemical supply path 18 that communicates with the vapor header 12. The chemical supply path 18 includes a chemical injection pump 19 that supplies the condensate treatment agent in the chemical tank 17 to the steam header 12.

薬剤タンク１７内に貯蔵されている復水処理剤は、炭素数１０〜１８の脂肪酸またはそのアミン塩と中和性アミンとを含有する水分散液である。この復水処理剤は、上記各成分を純水に加え、混合および分散して調製される。   The condensate treatment agent stored in the chemical tank 17 is an aqueous dispersion containing a fatty acid having 10 to 18 carbon atoms or an amine salt thereof and a neutralizing amine. This condensate treatment agent is prepared by adding each of the above components to pure water, and mixing and dispersing them.

炭素数１０〜１８の脂肪酸としては、例えば、酪酸，カプロン酸，カプリル酸，カプリン酸，ラウリン酸，ミスチリン酸，パルミチン酸，ステアリン酸，オレイン酸，リノール酸，リノレン酸，リシノレン酸，アラキジン酸，エイコセン酸，ベヘン酸，エルシン酸，リグノセリン酸等を例示することができる。これらは単独で使用することもできるし、２種以上を組み合わせて使用することもできる。   Examples of the fatty acid having 10 to 18 carbon atoms include butyric acid, caproic acid, caprylic acid, capric acid, lauric acid, mytilic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, ricinolenic acid, arachidic acid, Examples thereof include eicosenoic acid, behenic acid, erucic acid, lignoceric acid and the like. These can be used alone or in combination of two or more.

炭素数１０〜１８の脂肪酸のアミン塩としては、例えば、酪酸，カプロン酸，カプリル酸，カプリン酸，ラウリン酸，ミスチリン酸，パルミチン酸，ステアリン酸，オレイン酸，リノール酸，リノレン酸，リシノレン酸，アラキジン酸，エイコセン酸，ベヘン酸，エルシン酸，リグノセリン酸等から選ばれる脂肪酸のモルホリン塩を例示することができる。これらは単独で使用することもできるし、２種以上を組み合わせて使用することもできる。   Examples of amine salts of fatty acids having 10 to 18 carbon atoms include butyric acid, caproic acid, caprylic acid, capric acid, lauric acid, myristylic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, ricinolenic acid, Examples include morpholine salts of fatty acids selected from arachidic acid, eicosenoic acid, behenic acid, erucic acid, lignoceric acid and the like. These can be used alone or in combination of two or more.

中和性アミンは気化性に優れるものであれば特に限定されず、例えば、２−アミノ−２−メチル−１−プロパノール，シクロヘキシルアミン，ジシクロヘキシルアミン，ジエタノールアミン，ジエチルアミノエタノール，ジエチルヒドロキシルアミン，２−ジメチルアミノエタノール，ジメチルイソプロパノールアミン，３−メトキシ−ｎ−プロピルアミン，２−アミノエタノール，モルホリン，または１−アミノ−２−プロパノール等を例示することができる。これらは単独で使用することもできるし、２種以上を組み合わせて使用することもできる。   The neutralizing amine is not particularly limited as long as it has excellent vaporization properties. For example, 2-amino-2-methyl-1-propanol, cyclohexylamine, dicyclohexylamine, diethanolamine, diethylaminoethanol, diethylhydroxylamine, 2-dimethyl Examples include aminoethanol, dimethylisopropanolamine, 3-methoxy-n-propylamine, 2-aminoethanol, morpholine, 1-amino-2-propanol, and the like. These can be used alone or in combination of two or more.

上記脂肪酸またはそのアミン塩（以下、「Ａ成分」いう場合がある）と中和性アミン（以下、「Ｂ成分」という場合がある）の配合割合（重量比）としては、Ｂ成分がＡ成分より多ければ特に限定されず、通常は、Ａ成分：Ｂ成分＝１：１．１〜１：１０００が好ましく、１：１．３〜１：５００がより好ましい。Ａ成分に比べてＢ成分を多く配合することで、ボイラ装置１へ復水処理剤を供給する場合において、皮膜基準およびｐＨ基準のうち、いずれか一の基準を満たすのに必要な量の復水処理剤を供給したとき、他の基準に対しても適正量の復水処理剤を供給することができる。   As a blending ratio (weight ratio) of the fatty acid or its amine salt (hereinafter sometimes referred to as “component A”) and a neutralizing amine (hereinafter sometimes referred to as “component B”), component B is component A. If it is more, it will not specifically limit, Usually, A component: B component = 1: 1.1-1: 1000 are preferable, and 1: 1.3-1: 500 are more preferable. In the case where the condensate treatment agent is supplied to the boiler device 1 by blending a larger amount of the B component than the A component, the amount of reconstitution necessary for satisfying any one of the film standard and the pH standard is satisfied. When the water treatment agent is supplied, an appropriate amount of the condensate treatment agent can be supplied with respect to other standards.

つぎに、ボイラ装置１の運転方法を説明し、あわせてボイラ装置１の腐食抑制方法を説明する。ボイラ装置１を運転する場合は、注水路８から給水タンク９へ補給水を供給し、この補給水をボイラ２への給水として給水タンク９に貯留する。そして、給水ポンプ１１を作動させ、給水タンク９に貯留された給水を給水配管１０を通じてボイラ２へ供給する。   Next, an operation method of the boiler apparatus 1 will be described, and a method for inhibiting corrosion of the boiler apparatus 1 will be described. When the boiler device 1 is operated, makeup water is supplied from the water injection channel 8 to the water supply tank 9, and this makeup water is stored in the water supply tank 9 as water supply to the boiler 2. Then, the water supply pump 11 is operated to supply the water stored in the water supply tank 9 to the boiler 2 through the water supply pipe 10.

ボイラ２へ供給された給水は、ボイラ水としてボイラ２内に貯留される。そして、ボイラ２に貯留されたボイラ水は、加熱されて徐々に蒸気になる。生成した蒸気は、蒸気供給管１３を通じて蒸気ヘッダ１２へ送られ、第一蒸気配管１４，第二蒸気配管１５および第三蒸気配管１６を通じて負荷機器４等へ供給される。負荷機器４へ供給された蒸気は、負荷機器４を通過して復水配管６へ流れ、そこで潜熱を失って一部が凝縮水に変わり、スチームトラップ（図示省略）において蒸気と水とが分離されて高温の復水となる。このように生成した復水は、復水配管６を通じて給水タンク９へ回収される。給水タンク９へ回収された復水は、そこで、注水路８からの補給水と混合され、ボイラ２への給水として再利用される。   The feed water supplied to the boiler 2 is stored in the boiler 2 as boiler water. And the boiler water stored by the boiler 2 is heated, and becomes steam gradually. The generated steam is sent to the steam header 12 through the steam supply pipe 13 and supplied to the load device 4 and the like through the first steam pipe 14, the second steam pipe 15, and the third steam pipe 16. The steam supplied to the load device 4 passes through the load device 4 and flows to the condensate pipe 6 where it loses latent heat and partly changes to condensed water, and the steam and water are separated in a steam trap (not shown). It becomes hot condensate. The condensate thus generated is collected into the water supply tank 9 through the condensate pipe 6. The condensate recovered in the water supply tank 9 is then mixed with makeup water from the water injection channel 8 and reused as water supply to the boiler 2.

上述したボイラ装置１の運転中において、薬剤供給装置７の薬注ポンプ１９を作動させ、薬剤タンク１７内に貯蔵されている復水処理剤を薬剤供給路１８を通じて蒸気ヘッダ１２へ供給する。蒸気ヘッダ１２へ供給された復水処理剤が上述した脂肪酸と中和性アミンを含有する場合、脂肪酸は蒸気ヘッダ１２においてボイラ２からの蒸気に混合され、第一蒸気配管１４，第二蒸気配管１５および第三蒸気配管１６および復水配管６に供給される。そして、これらの配管に供給された脂肪酸は、配管の内周面に防食性の皮膜を形成し、腐食を抑制する。一方、中和性アミンは蒸気ヘッダ１２において蒸気に混合され、第一蒸気配管１４，第二蒸気配管１５および第三蒸気配管１６および復水配管６に供給される。そして、これらの配管に供給された中和性アミンは、蒸気や復水中に含まれる炭酸ガスを中和してｐＨをアルカリ性側に調整し、各配管のｐＨの影響による腐食を抑制する。   During the operation of the boiler device 1 described above, the chemical injection pump 19 of the chemical supply device 7 is operated to supply the condensate treatment agent stored in the chemical tank 17 to the steam header 12 through the chemical supply path 18. When the condensate treatment agent supplied to the steam header 12 contains the above-described fatty acid and neutralizing amine, the fatty acid is mixed with the steam from the boiler 2 in the steam header 12, and the first steam pipe 14 and the second steam pipe. 15 and the third steam pipe 16 and the condensate pipe 6. And the fatty acid supplied to these piping forms an anticorrosive film on the inner peripheral surface of the piping and suppresses corrosion. On the other hand, the neutralizing amine is mixed with the steam in the steam header 12 and supplied to the first steam pipe 14, the second steam pipe 15, the third steam pipe 16 and the condensate pipe 6. And the neutralizing amine supplied to these piping neutralizes the carbon dioxide gas contained in a vapor | steam and condensate, adjusts pH to the alkaline side, and suppresses the corrosion by the influence of pH of each piping.

また、蒸気ヘッダ１２へ供給された復水処理剤が脂肪酸のアミン塩と中和性アミンを含有する場合、脂肪酸のアミン塩は蒸気ヘッダ１２においてボイラ２からの蒸気に混合され、その熱により脂肪酸とアミン成分に分解され、第一蒸気配管１４，第二蒸気配管１５および第三蒸気配管１６および復水配管６に供給される。この場合、脂肪酸は上述した場合と同様に皮膜形成剤として作用し、アミン成分は上述した中和性アミンと同様の作用を奏する。すなわち、脂肪酸のアミン塩と中和性アミンを含有する復水処理剤を用いた場合、ボイラ装置内において脂肪酸が皮膜形成剤として作用し、アミン成分と中和性アミンがｐＨ調整剤として作用する。   Further, when the condensate treatment agent supplied to the steam header 12 contains a fatty acid amine salt and a neutralizing amine, the fatty acid amine salt is mixed with the steam from the boiler 2 in the steam header 12, and the heat causes the fatty acid Are decomposed into amine components and supplied to the first steam pipe 14, the second steam pipe 15, the third steam pipe 16 and the condensate pipe 6. In this case, the fatty acid acts as a film forming agent as in the case described above, and the amine component exhibits the same effect as the neutralizing amine described above. That is, when a condensate treatment agent containing an amine salt of a fatty acid and a neutralizing amine is used, the fatty acid acts as a film forming agent in the boiler device, and the amine component and the neutralizing amine act as a pH adjuster. .

そして、上述したように、脂肪酸と中和性アミン（脂肪酸のアミン塩が熱分解して生じるアミン成分も含む）のうち、各配管に対する供給量は相対的に中和性アミンの方が多い。このため、皮膜基準およびｐＨ基準のうち、いずれか一の基準を満たすのに必要な量の復水処理剤をボイラ装置１へ供給したとき、他の基準に対しても適正量の復水処理剤を供給することができる。   As described above, among fatty acids and neutralizing amines (including amine components generated by thermal decomposition of fatty acid amine salts), the amount of supply to each pipe is relatively neutral. For this reason, when the amount of condensate treatment agent necessary to satisfy any one of the film standard and the pH standard is supplied to the boiler device 1, an appropriate amount of condensate treatment with respect to the other standards. An agent can be supplied.

以上、上述した実施形態では、復水処理剤を蒸気ヘッダ１２へ供給する場合について説明したが、本発明では、蒸気供給部５のうち蒸気供給管１３や第一蒸気配管１４等、および給水配管１０にも供給することができる。   As mentioned above, although embodiment mentioned above demonstrated the case where a condensate treatment agent was supplied to the steam header 12, in this invention, the steam supply pipe | tube 13, the 1st steam piping 14, etc. among the steam supply parts 5, and water supply piping. 10 can also be supplied.

本発明は、ボイラで発生した蒸気が凝縮して得られる復水をボイラ用の給水として再利用するボイラ装置の腐食抑制用の復水処理剤として広く利用することができる。   INDUSTRIAL APPLICABILITY The present invention can be widely used as a condensate treatment agent for inhibiting corrosion of a boiler apparatus that reuses condensate obtained by condensing steam generated in a boiler as boiler feed water.

本発明を適用したボイラ装置の一例を示す概略構成図である。It is a schematic structure figure showing an example of a boiler device to which the present invention is applied.

Claims (4)

給水を加熱して蒸気を生成するボイラと、このボイラへ給水を供給する給水部と、前記ボイラで生成した蒸気を負荷機器へ供給する蒸気供給部と、前記負荷機器で使用した蒸気を復水として前記給水部へ供給する復水供給部とを備えたボイラ装置に供給して、前記ボイラ装置に発生する腐食を抑制するために用いられる復水処理剤であって、
炭素数１０〜１８の脂肪酸またはそのアミン塩と、中和性アミンとを含有することを特徴とする復水処理剤。 A boiler that heats feed water to generate steam, a water supply section that supplies water to the boiler, a steam supply section that supplies steam generated by the boiler to load equipment, and condensates steam used by the load equipment As a condensate treatment agent used for supplying to a boiler device provided with a condensate supply unit for supplying to the water supply unit, and used to suppress corrosion occurring in the boiler device,
A condensate treatment agent comprising a fatty acid having 10 to 18 carbon atoms or an amine salt thereof and a neutralizing amine. 炭素数１０〜１８の脂肪酸が、酪酸，カプロン酸，カプリル酸，カプリン酸，ラウリン酸，ミスチリン酸，パルミチン酸，ステアリン酸，オレイン酸，リノール酸，リノレン酸，リシノレン酸，アラキジン酸，エイコセン酸，ベヘン酸，エルシン酸およびリグノセリン酸からなる群より選ばれる少なくとも１種である、請求項１記載の復水処理剤。   Fatty acids having 10 to 18 carbon atoms are butyric acid, caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, ricinolenic acid, arachidic acid, eicosenoic acid, The condensate treatment agent according to claim 1, which is at least one selected from the group consisting of behenic acid, erucic acid and lignoceric acid. 炭素数１０〜１８の脂肪酸のアミン塩が該脂肪酸のモルホリン塩である、請求項１または２記載の復水処理剤。   The condensate treatment agent according to claim 1 or 2, wherein the amine salt of a fatty acid having 10 to 18 carbon atoms is a morpholine salt of the fatty acid. 中和性アミンが、２−アミノ−２−メチル−１−プロパノール，シクロヘキシルアミン，ジシクロヘキシルアミン，ジエタノールアミン，ジエチルアミノエタノール，ジエチルヒドロキシルアミン，２−ジメチルアミノエタノール，ジメチルイソプロパノールアミン，３−メトキシ−ｎ−プロピルアミン，２−アミノエタノール，モルホリンおよび１−アミノ−２−プロパノールからなる群より選ばれる少なくとも１種である、請求項１〜３のいずれかに記載の復水処理剤。   The neutralizing amine is 2-amino-2-methyl-1-propanol, cyclohexylamine, dicyclohexylamine, diethanolamine, diethylaminoethanol, diethylhydroxylamine, 2-dimethylaminoethanol, dimethylisopropanolamine, 3-methoxy-n-propyl. The condensate treatment agent according to any one of claims 1 to 3, which is at least one selected from the group consisting of amine, 2-aminoethanol, morpholine and 1-amino-2-propanol.
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JP2018531010A (en) * 2015-09-28 2018-10-25 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ How to neutralize cottonseed

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