JP2000161655A - Water tube wall protection structure of furnace and corrosionproof coating agent - Google Patents
Water tube wall protection structure of furnace and corrosionproof coating agentInfo
- Publication number
- JP2000161655A JP2000161655A JP10353898A JP35389898A JP2000161655A JP 2000161655 A JP2000161655 A JP 2000161655A JP 10353898 A JP10353898 A JP 10353898A JP 35389898 A JP35389898 A JP 35389898A JP 2000161655 A JP2000161655 A JP 2000161655A
- Authority
- JP
- Japan
- Prior art keywords
- coating agent
- water tube
- tube wall
- furnace
- protection structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、炉の水管壁保護構
造、及びこれに用いられる腐食防止用コート剤に関し、
詳しくは、腐食防止が図られた炉の水管壁保護構造、及
び腐食防止性に優れた腐食防止用コート剤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for protecting a water tube wall of a furnace, and a coating agent for corrosion prevention used in the structure.
More specifically, the present invention relates to a water tube wall protection structure for a furnace in which corrosion is prevented, and a coating agent for corrosion prevention excellent in corrosion prevention.
【０００２】[0002]
【従来の技術】都市ゴミ焼却炉等、大型のゴミ焼却炉で
は、ゴミの焼却で発生した熱を回収するため炉壁の外周
りに多数本の水管を配設し、水管内に流れる水と炉内の
熱とを熱交換させて熱利用を図っている。前記ゴミ焼却
炉にあっては、都市ゴミ等雑多な塵芥を焼却処理するた
め、例えば塵芥に混在した塩化ビニルや塩化ビニリデン
等の塩素系樹脂、あるいはテフロン、その他のフッ素系
樹脂、またはクロロプレンや塩素化ゴム等のハロゲン含
有ゴム、加硫ゴム等の硫黄含有物を焼却処理するため、
塩素や塩酸ガス、フッ素やフッ酸ガス、あるいはＳＯ2
ガス等の有害腐食性ガスが炉内で発生することが多い。2. Description of the Related Art In a large-scale refuse incinerator such as an urban refuse incinerator, a large number of water pipes are arranged around an outer wall of a furnace wall for recovering heat generated by incineration of garbage. Heat is exchanged with the heat inside the furnace to utilize heat. In the garbage incinerator, in order to incinerate miscellaneous garbage such as municipal garbage, for example, chlorine-based resin such as vinyl chloride and vinylidene chloride mixed in the garbage, or Teflon, other fluorine-based resin, or chloroprene or chlorine To incinerate halogen-containing rubber such as vulcanized rubber and sulfur-containing materials such as vulcanized rubber,
Chlorine or hydrochloric acid gas, fluorine or hydrofluoric acid gas, or SO 2
Harmful corrosive gases such as gas are often generated in the furnace.
【０００３】このため、水管が配設された炉壁部におい
て、この種のガスによる腐食損傷から水管を保護するた
め、水管の炉内側を耐火物により覆う構造を採用してい
る。そして、この水管保護用の耐火物としては、耐火性
骨材とアルミナセメントまたは燐酸等の結合材からなる
キャスタブル等の不定形耐火物が多く用いられていた。
しかし、各種腐食性ガス等の外来成分がキャスタブル等
の不定形耐火物で構成される保護層内に侵入して、変質
層を生成したり、組織を劣化させるため、保護層として
は、十分ではなかった。また温度変化に伴う熱応力のた
め、保護層に亀裂、剥離が生じ、この点からも保護層と
しては、十分ではなかった。その結果、十分な耐久性を
得ることができなかった。For this reason, a structure is adopted in which the inside of the furnace of the water tube is covered with a refractory in order to protect the water tube from corrosion damage caused by such gas in the furnace wall portion where the water tube is disposed. And, as the refractory for protecting the water pipe, an amorphous refractory such as a castable made of a refractory aggregate and a binder such as alumina cement or phosphoric acid has been often used.
However, since extraneous components such as various corrosive gases penetrate into the protective layer made of an amorphous refractory such as a castable, and generate a deteriorated layer or deteriorate a structure, the protective layer is not sufficient. Did not. In addition, cracks and peeling occurred in the protective layer due to thermal stress accompanying a temperature change, and from this point, the protective layer was not sufficient. As a result, sufficient durability could not be obtained.
【０００４】最近では、耐久性の向上及び損傷部の補修
施工の容易さや簡素化等の観点から、例えば、特開平２
−２０３１９４号、特開平８−１７８２４２号に開示さ
れているように、耐火パネルを金属製のボルトで取り付
ける方式、あるいはフックで取り付ける方式の耐火構造
が提案されている。In recent years, from the viewpoints of improving durability, repairing and repairing damaged parts, and simplification, for example, Japanese Patent Laid-Open No.
As disclosed in JP-A-203194 and JP-A-8-178242, there has been proposed a fireproof structure in which a fireproof panel is attached with metal bolts or hooks.
【０００５】前記特開平２−２０３１９４号に示された
構造について、図１、図２に基づいて説明する。なお、
図１は水管に直角な面での断面図であり、図２は水管に
平行な面での断面図である。この公報で提案されている
炉の水管壁保護構造は、図に示すように水管１にフィン
２を接続して水管壁を形成し、耐火レンガ製のパネル３
を、該パネル３の面と上記水管壁の接ガス側の面の間及
び隣接パネルの端面の間にモルタル４を充填した状態
で、スタッドボルト５により水管壁に対して取付け、上
記スタッドボルト５の先端露出部に耐火レンガ製のキャ
ップ６を冠着するものである。The structure disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2-203194 will be described with reference to FIGS. In addition,
FIG. 1 is a sectional view taken on a plane perpendicular to the water pipe, and FIG. 2 is a sectional view taken on a plane parallel to the water pipe. The water tube wall protection structure proposed in this publication has a water tube wall formed by connecting a fin 2 to a water tube 1 as shown in FIG.
The mortar 4 is filled between the surface of the panel 3 and the surface of the water tube wall on the gas contact side and the end surface of the adjacent panel with the stud bolt 5 and attached to the water tube wall. A cap 6 made of a firebrick is mounted on an exposed end of the bolt 5.
【０００６】また、特開平８−１７８２４２号に示され
た構造について、図３に基づいて説明する。なお、図３
（ａ）は炉内側から見た図であり、（ｂ）水管に直角な
面での断面図である。この公報で提案されている炉の水
管壁保護構造は、前記特開平２−２０３１９４号に示さ
れた構造と同様に、水管１にフィン２を接続して水管壁
を形成し、耐火レンガ製のパネル３を、該パネル３の面
と上記水管壁の接ガス側の面の間及び隣接パネルの端面
の間にモルタル４を充填した状態で、フック７により水
管壁に対して取付けるものである。The structure disclosed in Japanese Patent Application Laid-Open No. 8-178242 will be described with reference to FIG. Note that FIG.
(A) is the figure seen from the furnace inside, (b) is sectional drawing in the surface perpendicular | vertical to a water pipe. The water pipe wall protection structure of the furnace proposed in this publication is similar to the structure shown in the above-mentioned JP-A-2-203194, in which a fin 2 is connected to a water pipe 1 to form a water pipe wall, and a firebrick is formed. 3 is attached to the water pipe wall by hooks 7 in a state where the mortar 4 is filled between the surface of the panel 3 and the gas contact side of the water pipe wall and the end face of the adjacent panel. Things.
【０００７】前述した耐火パネルによる炉の水管保護壁
構造では、耐腐食性、特に高温耐食性及び耐摩耗性に優
れる炭化珪素質材をパネル材料として用いることによ
り、従来の不定形耐火物に比べて格段の耐久性の向上が
図られるようになり、また炭化珪素質パネルは熱伝導性
にも優れていることから、水管での熱交換効率の向上も
図られる。[0007] In the water tube protection wall structure of a furnace using the above-described fireproof panel, a silicon carbide-based material having excellent corrosion resistance, particularly high-temperature corrosion resistance and wear resistance, is used as a panel material. The remarkable improvement in durability is achieved, and the silicon carbide panel is also excellent in heat conductivity, so that the heat exchange efficiency in the water pipe is also improved.
【０００８】[0008]
【発明が解決しようとする課題】ところで、前記耐火パ
ネル自体は上記腐食性ガスによっても殆ど損傷を受ける
ことはない。しかし、前記スタッドボルトは、先端露出
部に耐火レンガ製のキャップが冠着されているとはい
え、炉内の上記腐食性ガスが侵入し、それによって腐食
し、前記耐火パネルを保持できなくなることがあった。
また、フックについても、モルタルの劣化によって、モ
ルタル内に侵入した腐食性ガスによって腐食し、前記耐
火パネルを保持できなくなることがあった。そのため、
実質的に水管保護壁全体の耐久性が低減され、前記耐火
パネル自体が本来的に有する優れた耐久性を充分に発揮
させることができないという技術的課題があった。The refractory panel itself is hardly damaged by the corrosive gas. However, even though the stud bolt has a cap made of firebrick on the exposed end, the corrosive gas in the furnace invades and thereby corrodes, so that the fireproof panel cannot be held. was there.
Further, the hooks were also corroded by the corrosive gas invading the mortar due to the deterioration of the mortar, and it was sometimes impossible to hold the fireproof panel. for that reason,
There has been a technical problem that the durability of the entire water pipe protection wall is substantially reduced, and the excellent durability inherent in the fireproof panel itself cannot be sufficiently exhibited.
【０００９】この技術的課題を解決する方法として、前
記スタッドボルト、フックを、高温耐食性に優れた材
質、例えばハステロイ合金等を用いて製作し、これを用
いて耐火パネルを保持することを検討した。しかし、こ
の解決方法では、ハステロイ合金等が高価なため、コス
トがかかるという新たな技術的課題を招来するものであ
った。As a method of solving this technical problem, it has been studied to manufacture the stud bolts and hooks using a material excellent in high-temperature corrosion resistance, for example, Hastelloy alloy, and to use these to hold a fireproof panel. . However, this solution has a new technical problem that the cost is high because Hastelloy alloy and the like are expensive.
【００１０】本発明は、上記技術的課題を解決するため
になされたものであり、耐火パネルを固定するスタッド
ボルト等の取付金具に、ハステロイ合金等の高価な金属
を使用することなく、しかも従来の耐火パネルによる水
管保護壁構造に比較してその耐久性が著しく向上した炉
の水管壁保護構造を提供することを目的とするものであ
る。また、本発明の他の目的は、水管保護壁構造に用い
るのに適した腐食防止用コート剤を提供することを目的
とするものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned technical problems, and does not use expensive metal such as Hastelloy alloy for mounting brackets such as stud bolts for fixing a fireproof panel. It is an object of the present invention to provide a water tube wall protection structure of a furnace whose durability is remarkably improved as compared with the water tube protection wall structure using the fireproof panel. Another object of the present invention is to provide a corrosion preventing coating agent suitable for use in a water pipe protection wall structure.
【００１１】[0011]
【課題を解決するための手段】本発明は上記目的を達成
するためになされたものであり、本発明にかかる炉の水
管壁保護構造は、水管壁を耐火パネルにより保護する炉
の水管壁保護構造において、腐食防止用コート剤が塗布
された取付金具によって、前記耐火バネルが取付られて
いることを特徴としている。ここで、前記取付金具は、
水管壁に耐火パネルを取付、固定するボルト、ナット、
あるいはフックであることが望ましく、また前記腐食防
止用コート剤が、前記取付金具の表面に０．５乃至２ｍ
ｍの厚さで塗布されていることが望ましい。DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above object, and a water pipe wall protection structure for a furnace according to the present invention has a water pipe of a furnace for protecting the water pipe wall with a fireproof panel. The pipe wall protection structure is characterized in that the refractory panel is mounted by a mounting bracket coated with a corrosion preventing coating agent. Here, the mounting bracket is
Bolts and nuts for attaching and fixing the fireproof panel to the water pipe wall,
Alternatively, a hook is desirable, and the coating agent for corrosion prevention is 0.5 to 2 m on the surface of the mounting bracket.
m.
【００１２】また、本発明にかかる腐食防止用コート剤
は、水管壁を耐火パネルにより保護する炉の水管壁保護
構造において用いられる腐食防止用コート剤において、
結合剤として無機系結合剤を用い、かつ骨材中にシリカ
（ＳｉＯ2 ）成分を５０重量％以上含有することを特徴
としている。ここで、前記結合剤が、燐酸塩ガラス、燐
酸ソーダ、珪酸ソーダ、珪酸カリ、シリカゾルから選ば
れた少なくとも１種であることが望ましく、また骨材の
少なくとも一部がセラミックファイバーであることが望
ましい、更に、前記セラミックファイバーの骨材中での
含有量が５重量％以上であることが望ましい。Further, the corrosion-preventing coating agent according to the present invention is a corrosion-preventing coating agent used in a water tube wall protection structure of a furnace for protecting a water tube wall with a fireproof panel.
It is characterized in that an inorganic binder is used as a binder, and that the silica (SiO 2 ) component is contained in the aggregate at 50% by weight or more. Here, it is desirable that the binder is at least one selected from phosphate glass, sodium phosphate, sodium silicate, potassium silicate, and silica sol, and that at least a part of the aggregate is a ceramic fiber. Furthermore, it is desirable that the content of the ceramic fiber in the aggregate is 5% by weight or more.
【００１３】本発明は、炉の水管保護構造に使用する耐
火パネルを取付ける取付金具に腐食防止用コート剤を塗
布することにより、問題となる炉内の腐食性ガスに起因
する腐食損耗を回避し、これにより耐火パネルを用いた
炉の水管保護構造全体の耐久性の向上を図るものであ
る。前記腐食防止用コート剤は、既に述べたハステロイ
合金等の特殊金属材料に比較して安価で、また刷毛塗り
あるいは吹付けで簡易に施工できる。そのため、取付け
金具を取付ける時に、特段の手間を要することなく容易
に腐食防止用コート剤を取付け金具に施工することがで
きる利点を有する。The present invention avoids corrosion and wear caused by corrosive gas in the furnace, which is a problem, by applying a corrosion-preventing coating agent to a fitting for mounting a fireproof panel used in a water pipe protection structure of a furnace. Thereby, the durability of the entire water tube protection structure of the furnace using the fireproof panel is improved. The corrosion-preventing coating agent is inexpensive compared to the above-mentioned special metal materials such as Hastelloy alloy and can be easily applied by brushing or spraying. Therefore, there is an advantage that when attaching the mounting bracket, the corrosion preventing coating agent can be easily applied to the mounting bracket without requiring special labor.
【００１４】本発明にかかる腐食防止用コート剤として
は、結合剤成分として、前記したように燐酸化合物、ケ
イ酸塩化合物、シリカゾル等の無機系結合剤を使用し、
これに骨材成分としてシリカ等珪酸質骨材を配合したも
のが好適である。結合剤として、上記の無機系剤を使用
することにより、結合剤が比較的低温で保護膜を形成
し、腐食ガスの内部金属部分への浸入を防止することが
できる。また骨材成分の少なくとも一部にセラミックフ
ァイバーを用いると、コート剤の厚みが取付け金具の膨
張代となり、取付け金具の膨張によるモルタル等の充填
剤の亀裂の発生を低減することができる。As the coating agent for corrosion prevention according to the present invention, an inorganic binder such as a phosphoric acid compound, a silicate compound or silica sol is used as a binder component as described above.
It is preferable to add a siliceous aggregate such as silica as an aggregate component to this. By using the above-mentioned inorganic-based agent as a binder, the binder forms a protective film at a relatively low temperature, and can prevent penetration of corrosive gas into an internal metal portion. When ceramic fibers are used for at least a part of the aggregate component, the thickness of the coating agent serves as an expansion allowance of the mounting bracket, and it is possible to reduce the occurrence of cracks in the filler such as mortar due to expansion of the mounting bracket.
【００１５】[0015]
【発明の実施の形態】本発明は、炉の水管壁保護構造に
用いられる耐火パネルを取り付ける取付金具に腐食防止
用コート剤を塗布することにより、炉内において発生す
る腐食性ガスに起因する腐食損耗を抑制し、前記耐火パ
ネルを用いた水管壁保護構造の耐久性の向上を図るもの
である。本発明にかかる腐食防止用コート剤は、結合剤
成分として無機系結合剤を用いる。そして、無機系結合
剤としては、例えば、燐酸塩ガラス、あるいは燐酸ソー
ダ、燐酸カリ等の縮合燐酸塩といった燐酸化合物類、珪
酸ソーダ等の珪酸塩ガラス、珪酸カリ等の珪酸化合物、
シリカゾル等を挙げることができる。これらの無機系結
合剤は、比較的低温で取付金具の金属表面に保護膜を形
成し、腐食性ガスの浸入を防止する作用効果を奏するも
のである。BEST MODE FOR CARRYING OUT THE INVENTION The present invention is based on a corrosion-causing gas generated in a furnace by applying a corrosion-preventing coating agent to a fitting for mounting a fireproof panel used for a water pipe wall protection structure of a furnace. It is intended to suppress corrosion and abrasion and improve the durability of a water pipe wall protection structure using the fireproof panel. The coating agent for corrosion prevention according to the present invention uses an inorganic binder as a binder component. As the inorganic binder, for example, phosphate glass, or phosphate compounds such as sodium phosphate, condensed phosphate such as potassium phosphate, silicate glass such as sodium silicate, silicate compounds such as potassium silicate,
Silica sol and the like can be mentioned. These inorganic binders form a protective film on the metal surface of the mounting bracket at a relatively low temperature, and have an effect of preventing corrosive gas from entering.
【００１６】前記腐食防止用コート剤の骨材成分として
は、特に限定はなく、通常この種のコート剤に使用され
るアルミナ、シリカ、ムライト、シャモット等の骨材を
用いることができるが、耐腐食性の観点から、コート剤
全体のシリカ（ＳｉＯ2 ）成分が５０重量％以上含有さ
れていることが好ましい。また、骨材の一部としてセラ
ミックファイバーを配合したものはコート剤の厚みが取
付金具の膨張代となり、取付金具の膨張によるモルタル
等の充填剤の亀裂の発生を低減するという効果を奏す
る。The aggregate component of the coating agent for preventing corrosion is not particularly limited, and aggregates such as alumina, silica, mullite and chamotte which are usually used for this type of coating agent can be used. From the viewpoint of corrosiveness, it is preferable that the silica (SiO 2 ) component of the entire coating agent is contained by 50% by weight or more. In the case where ceramic fiber is blended as a part of the aggregate, the thickness of the coating agent serves as an expansion allowance of the mounting bracket, and has an effect of reducing the occurrence of cracks in the filler such as mortar due to expansion of the mounting bracket.
【００１７】セラミックファイバーとしては、例えば、
シリカ−アルミナ質、ムライト質等のバルクファイバー
を挙げることができる。上記セラミックファイバーの配
合量は、前記モルタル等の亀裂発生の低減効果が認めら
れる配合量、即ち、骨材成分全量に対し５重量％以上の
配合が好ましい。As the ceramic fiber, for example,
Examples thereof include silica-alumina and mullite bulk fibers. The compounding amount of the ceramic fiber is preferably such that the effect of reducing the occurrence of cracks in the mortar or the like is recognized, that is, 5% by weight or more based on the total amount of the aggregate component.
【００１８】前記腐食防止用コ−ト剤における結合剤成
分と骨材成分の配合比率は、特に限定されるものではな
いが、通常、結合剤が２０乃至５０重量％、骨材成分が
５０乃至８０重量％の範囲である。The mixing ratio of the binder component and the aggregate component in the coating agent for corrosion prevention is not particularly limited, but usually, the binder is 20 to 50% by weight and the aggregate component is 50 to 50% by weight. It is in the range of 80% by weight.
【００１９】本発明の炉の水管壁保護構造に用いられる
耐火パネル、前記耐火パネルを取付ける取付金具、耐火
パネル用充填剤等の部材に関しては、特に限定されるも
のではなく、通常この種の炉の水管壁保護構造に用いら
れる部品、材料、薬剤等を用いて良い。このような部
品、材料、薬剤の例として、耐火パネルには、炭化珪素
質タイル、取付金具としてＳＵＳ３１０Ｓ，ＳＵＳ３０
４等のステンレス鋼製のスタッドボルト、あるいはフッ
クまたはパネル充填剤としてのモルタル等を挙げること
ができる。There are no particular restrictions on the components such as the fireproof panel, the mounting bracket for mounting the fireproof panel, and the filler for the fireproof panel used in the water tube wall protection structure of the furnace of the present invention. Parts, materials, chemicals, etc. used for the water tube wall protection structure of the furnace may be used. As examples of such parts, materials and chemicals, fire-resistant panels include silicon carbide tiles and SUS310S and SUS30 as fittings.
And stainless steel stud bolts such as No. 4 or mortar as a hook or panel filler.
【００２０】前記腐食防止用コート剤を、耐火パネル取
付け用の取付金具に施工する方法としては、特に限定さ
れるものではないが、刷毛塗りあるいは吹付けによる塗
布が、該金具表面に均等な厚さで万遍なく保護膜を形成
できる点から好ましい。また、腐食防止用コート剤の取
付金具の表面への塗布量は、塗膜厚さとして０．５乃至
２ｍｍの厚さとすることが、取付金具の金属表面に緻密
で良好な保護膜層を形成させる点から好ましい。The method for applying the corrosion-preventing coating agent to a mounting bracket for mounting a fire-resistant panel is not particularly limited, but application by brushing or spraying is performed by applying a uniform thickness to the surface of the mounting bracket. This is preferable in that a protective film can be uniformly formed. The amount of the anticorrosion coating agent applied to the surface of the mounting bracket should be 0.5 to 2 mm as the thickness of the coating to form a dense and good protective film layer on the metal surface of the mounting bracket. It is preferable from the point of making.
【００２１】[0021]
【実施例】基材金属として、ＳＵＳ３１０Ｓ及びＳＵＳ
３０４の２種のステンレス鋼を使用し、これらステンレ
ス鋼基材（長方角片１０×２０×１３ｍｍ）の表面に、
それぞれ表１、表２に示した結合剤成分と骨材成分から
なるコート剤を１ｍｍの厚さに塗布した試料を調製した
（ＳＵＳ３１０Ｓ基材：Ｎｏ．１乃至１３、ＳＵＳ３０
４基材：Ｎｏ．１５乃至１８）。また、比較例用の試料
として別に、上記ＳＵＳ３１０Ｓ及びＳＵＳ３０４ステ
ンレス鋼基材（長方角片１０×２０×１３ｍｍ）のまま
の試料（Ｎｏ．１４，Ｎｏ．１９）を用意した。EXAMPLES As base metals, SUS310S and SUS310S were used.
Using two types of stainless steel 304, the surface of these stainless steel substrates (square pieces 10 × 20 × 13 mm)
Samples were prepared by applying a coating agent composed of a binder component and an aggregate component shown in Tables 1 and 2 to a thickness of 1 mm (SUS310S base materials: Nos. 1 to 13 and SUS30).
No. 4 base material: 15-18). Separately, samples (No. 14, No. 19) of the above SUS310S and SUS304 stainless steel base materials (rectangular pieces 10 × 20 × 13 mm) were prepared as samples for comparative examples.
【００２２】なお、表１、表２に示したコ−ト剤の結合
剤成分と骨材成分の配合比は、結合剤がシリカゾルの場
合、３０：７０、その他の結合剤の場合２０：８０とし
た。また、セラミックファイバ−以外の骨材成分は、最
大粒径０．５μｍ以下のシリカ粉末とアルミナ粉末を混
合して調製した。The mixing ratio of the binder component and the aggregate component of the coating agent shown in Tables 1 and 2 is 30:70 when the binder is silica sol and 20:80 when the other binder is used. And Aggregate components other than the ceramic fiber were prepared by mixing silica powder and alumina powder having a maximum particle size of 0.5 μm or less.
【００２３】次いで、上記コート剤塗布基材試料及び未
塗布基材試料の表面に、表３に記載した成分組成の人工
灰（模擬焼却灰）を１００ｍｇ／ｃｍ2 の割合でそれぞ
れ上塗りし、供試体（Ｎｏ．１乃至１９）を作製した。
焼却炉内の腐食性ガスを模擬して調製した混合ガス（組
成：表３参照）を流通させた炉内に、前記供試体（Ｎ
ｏ．１乃至１９）を挿入し、６００℃で９６時間加熱保
持して腐食試験を行った。試験終了後、各供試体の塗布
コート剤及び人工灰を除去し、更に１８％ＮａＯＨ＋３
％ＫＭｎＯ4 水溶液及び１０％クエン酸アンモニウム水
溶液を用いて洗浄により基材の腐食生成物を除去し、腐
食試験前後の各供試体基材の重量変化を測定し腐食量と
して記録した。Next, artificial ash (simulated incinerated ash) having the component composition shown in Table 3 was overcoated on the surfaces of the above-mentioned coated agent-coated substrate sample and the uncoated substrate sample at a rate of 100 mg / cm 2 , respectively. Specimens (Nos. 1 to 19) were produced.
The specimen (N) was placed in an oven through which a mixed gas (composition: see Table 3) prepared by simulating a corrosive gas in an incinerator was passed.
o. 1 to 19) were inserted and heated at 600 ° C. for 96 hours to perform a corrosion test. After the test was completed, the coating agent and artificial ash of each specimen were removed, and 18% NaOH + 3
The corrosion products of the base material were removed by washing using a 10% aqueous solution of KMnO 4 and an aqueous solution of 10% ammonium citrate, and the weight change of each test material before and after the corrosion test was measured and recorded as the amount of corrosion.
【００２４】前記ＳＵＳ３１０Ｓステンレス鋼基材にコ
ート剤未塗布の供試体（Ｎｏ．１４）の腐食量を標準値
１００とし、この値に対する各供試体の相対腐食量値を
腐食指数として表１、表２に示した。なお、各表に示さ
れた腐食指数は、数値が小さいほど耐食性に優れている
ことを示している。The corrosion amount of the specimen (No. 14) where the coating agent was not applied to the SUS310S stainless steel substrate was set to a standard value of 100, and the relative corrosion amount of each specimen with respect to this value was set as a corrosion index in Tables 1 and 2. 2 is shown. In addition, the smaller the numerical value of the corrosion index shown in each table, the more excellent the corrosion resistance.
【００２５】[0025]
【表１】 [Table 1]
【００２６】[0026]
【表２】 [Table 2]
【００２７】[0027]
【表３】 [Table 3]
【００２８】上記表１、表２に示した腐食試験結果か
ら、本発明にかかる腐食防止用コート剤を塗布した２種
類のステンレス鋼基体（ＳＵＳ３１０Ｓ基材：Ｎｏ．１
乃至１３、ＳＵＳ３０４基材：Ｎｏ．１５乃至１８）
は、いずれも、夫々対応するステンレス鋼で腐食防止用
コート剤を塗布しない比較例基体（Ｎｏ．１４及びＮ
ｏ．１９）に比べて腐食指数が小さく、本発明の腐食防
止用コート剤塗布により、耐食効果が向上したことが認
められた。特に、骨材成分のシリカ（ＳｉＯ2 ）含有率
が５０重量％以上の腐食防止用コート剤を塗布したＮ
ｏ．１乃至７及びＮｏ．１５、１６の基体の場合は、い
ずれも腐食指数が９０以下と低く、耐食性の向上効果が
顕著である。From the results of the corrosion tests shown in Tables 1 and 2, two types of stainless steel substrates (SUS310S substrate: No. 1) coated with the corrosion-preventing coating agent according to the present invention were used.
To 13, SUS304 base material: No. 15 to 18)
Are comparative example substrates (No. 14 and N
o. The corrosion index was smaller than that in the case of 19), and it was confirmed that the application of the coating agent for corrosion prevention of the present invention improved the corrosion resistance effect. In particular, N coated with a corrosion-preventing coating agent having a silica (SiO 2 ) content of 50% by weight or more as an aggregate component is applied.
o. Nos. 1 to 7 and No. In the case of the substrates 15 and 16, the corrosion index is as low as 90 or less, and the effect of improving the corrosion resistance is remarkable.
【００２９】なお、上記実施形態にあっては、腐食防止
用コート剤を塗布する対象として取付金具の場合につい
て説明したが、特にこれに限定されるものではなく、水
管壁保護構造を構成する水管、フィン等に対して、この
腐食防止用コート剤を塗布してもよい。特に、前記取付
金具に塗布する場合は、耐久性向上の面からより好まし
い。また、本発明の説明にあたって焼却炉の場合につい
て説明したが、ボイラ−等の炉についても当然適用され
るものである。In the above-described embodiment, the case of the mounting bracket has been described as a target to which the coating agent for corrosion prevention is applied. However, the present invention is not particularly limited to this, and the water pipe wall protecting structure is constituted. The corrosion preventing coating agent may be applied to a water pipe, a fin or the like. In particular, when applied to the mounting bracket, it is more preferable from the viewpoint of improving durability. In the description of the present invention, the case of an incinerator has been described, but the present invention is naturally applied to a furnace such as a boiler.
【００３０】[0030]
【発明の効果】以上のように、本発明にかかる炉の水管
壁保護構造によれば、炉の水管保護構造に使用する耐火
パネルを固定する取付金具に腐食防止用コート剤を塗布
することにより、問題となる炉内の腐食性ガスに起因す
る腐食損耗を回避することができる。その結果、耐火パ
ネルを用いた炉の水管保護構造全体の耐久性を向上させ
ることができる。また、本発明にかかる腐食防止用コー
ト剤によれば、従来使用されていたステンレス鋼やクロ
ム鋼、ニッケル・クロム鋼等の比較的安価な金属をその
まま使用することができ、ハステロイ合金等の特殊金属
材料に比較して安価で、また刷毛塗りあるいは吹付けで
簡易に施工できる。また、取付金具を取付ける時に、特
段の手間を要することなく容易に腐食防止用コート剤を
取付金具に施工することができるAs described above, according to the water tube wall protection structure for a furnace according to the present invention, a coating agent for preventing corrosion is applied to a fitting for fixing a fireproof panel used in the water tube protection structure for a furnace. Accordingly, it is possible to avoid corrosion and abrasion caused by corrosive gas in the furnace, which is a problem. As a result, the durability of the entire water tube protection structure of the furnace using the fireproof panel can be improved. Further, according to the coating agent for corrosion prevention according to the present invention, relatively inexpensive metals such as stainless steel, chromium steel, nickel-chromium steel and the like which have been conventionally used can be used as they are, and special metals such as Hastelloy alloys can be used. It is cheaper than metal materials and can be easily constructed by brushing or spraying. In addition, when attaching the mounting bracket, the anticorrosion coating agent can be easily applied to the mounting bracket without requiring any special labor.
【図１】図１は炉の水管壁保護構造を示すであって、水
管に直角な面での断面図である。FIG. 1 is a cross-sectional view of a water tube wall protection structure of a furnace taken along a plane perpendicular to a water tube.
【図２】図２は、図１の炉の水管壁保護構造の水管に平
行な面での断面図である。FIG. 2 is a cross-sectional view taken along a plane parallel to a water pipe of the water pipe wall protection structure of the furnace of FIG.
【図３】図３は他の炉の水管壁保護構造を示すであっ
て、（ａ）は、炉内側からみた図であり、（ｂ）は水管
に直角な面での断面図である。3A and 3B show a water tube wall protection structure of another furnace, wherein FIG. 3A is a diagram viewed from the inside of the furnace, and FIG. 3B is a cross-sectional view taken along a plane perpendicular to the water tube. .
１ 水管 ２ フィン ３ パネル ４ モルタル（充填剤） ５ スタッドボルト ６ キャップ ７ フック Reference Signs List 1 water pipe 2 fin 3 panel 4 mortar (filler) 5 stud bolt 6 cap 7 hook
Claims (7)
水管壁保護構造において、 腐食防止用コート剤が塗布された取付金具によって、前
記耐火パネルが水管壁に取付られていることを特徴とす
る炉の水管壁保護構造。1. A water tube wall protection structure for a furnace in which a water tube wall is protected by a fireproof panel, wherein the fireproof panel is attached to the water tube wall by a mounting bracket coated with a corrosion preventing coating agent. Characteristic furnace water tube wall protection structure.
取付、固定するボルト、ナット、あるいはフックである
ことを特徴とする請求項１に記載された炉の水管壁保護
構造。2. The water tube wall protection structure according to claim 1, wherein the mounting member is a bolt, a nut, or a hook for mounting and fixing a fireproof panel to the water tube wall.
具の表面に０．５乃至２ｍｍの厚さで塗布されているこ
とを特徴とする請求項１または請求項２に記載された炉
の水管壁保護構造。3. The furnace according to claim 1, wherein the corrosion-preventing coating agent is applied to the surface of the mounting bracket in a thickness of 0.5 to 2 mm. Water pipe wall protection structure.
水管壁保護構造において用いられる腐食防止用コート剤
において、 結合剤として無機系結合剤を用い、かつコート剤全体の
シリカ（ＳｉＯ2 ）成分が５０重量％以上含有すること
を特徴とする水管壁保護構造に用いられる腐食防止用コ
ート剤。4. A coating agent for corrosion prevention used in a water tube wall protection structure of a furnace for protecting a water tube wall with a refractory panel, wherein an inorganic binder is used as a binder and silica (SiO 2 ) A coating agent for corrosion prevention used in a water pipe wall protective structure, characterized by containing 50% by weight or more of a component.
ダ、珪酸ソーダ、珪酸カリ、シリカゾルから選ばれた少
なくとも１種であることを特徴とする請求項４に記載さ
れた腐食防止用コート剤。5. The coating agent according to claim 4, wherein the binder is at least one selected from phosphate glass, sodium phosphate, sodium silicate, potassium silicate, and silica sol. .
イバーであることを特徴とする請求項４または請求項５
に記載された腐食防止用コート剤。6. The material according to claim 4, wherein at least a part of the aggregate is a ceramic fiber.
The coating agent for corrosion prevention described in 1.
含有量が５重量％以上であることを特徴とする請求項６
に記載された腐食防止用コート剤。7. The content of the ceramic fiber in the aggregate is 5% by weight or more.
The coating agent for corrosion prevention described in 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10353898A JP2000161655A (en) | 1998-11-27 | 1998-11-27 | Water tube wall protection structure of furnace and corrosionproof coating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10353898A JP2000161655A (en) | 1998-11-27 | 1998-11-27 | Water tube wall protection structure of furnace and corrosionproof coating agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000161655A true JP2000161655A (en) | 2000-06-16 |
Family
ID=18433973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10353898A Pending JP2000161655A (en) | 1998-11-27 | 1998-11-27 | Water tube wall protection structure of furnace and corrosionproof coating agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000161655A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013053829A (en) * | 2011-09-06 | 2013-03-21 | Kawasaki Heavy Ind Ltd | Boiler with corrosion inhibition apparatus and method for inhibiting corrosion of boiler |
-
1998
- 1998-11-27 JP JP10353898A patent/JP2000161655A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013053829A (en) * | 2011-09-06 | 2013-03-21 | Kawasaki Heavy Ind Ltd | Boiler with corrosion inhibition apparatus and method for inhibiting corrosion of boiler |
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