JPH09292198A - Heat exchanger, supporting plate for heat exchanger and manufacture thereof - Google Patents
Heat exchanger, supporting plate for heat exchanger and manufacture thereofInfo
- Publication number
- JPH09292198A JPH09292198A JP10527596A JP10527596A JPH09292198A JP H09292198 A JPH09292198 A JP H09292198A JP 10527596 A JP10527596 A JP 10527596A JP 10527596 A JP10527596 A JP 10527596A JP H09292198 A JPH09292198 A JP H09292198A
- Authority
- JP
- Japan
- Prior art keywords
- heat exchanger
- tube
- chromium
- support plate
- tube support
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
- F28F9/0131—Auxiliary supports for elements for tubes or tube-assemblies formed by plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
- F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は火力、原子力発電プ
ラント、化学プラント等の熱交換器に関し、さらに詳し
くは水中のマグネタイトなどの鉄酸化物が付着すること
を軽減・防止した熱交換器用管支持板及びその製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for a thermal power plant, a nuclear power plant, a chemical plant, etc., and more specifically, a tube support for a heat exchanger which reduces or prevents the adhesion of iron oxide such as magnetite in water. The present invention relates to a plate and a manufacturing method thereof.
【０００２】[0002]
【従来の技術】火力、原子力発電プラント、化学プラン
ト等の熱交換器において、熱交換器内に配置された伝熱
管は管支持板により横方向に支持されている。管支持板
の構成材料には炭素鋼やＳＵＳ系ステンレス鋼が一般に
使用されている。図６は一例としてシェルアンドチュー
ブ方式の縦型熱交換器１０の内部を概念的に示したもの
であるが、その内部においては、伝熱管１３を多数配置
して伝熱管束を構成しており、それら伝熱管束は管支持
板１８により支持されている。外胴、すなわちシェル１
１と一体的に形成された管板１２に多数の逆Ｕ字形伝熱
管１３の両端が挿入・接合されている。そして１５０〜
３５０℃の高温の加熱流体１４が水室１５に流入し、こ
の加熱流体１４が伝熱管１３を貫流し、後述するように
熱を与えて低温になり、水室１６から流出する。種々の
曲げ半径を有する多数の伝熱管１３は伝熱管束を形成
し、これはラッパー筒１７によって囲まれると共に複数
の管支持板１８により横方向に支持されている。そして
給水ノズル１９を通って流入した給水２０はラッパー筒
１７とシェル１１の間を流れ下り、管板１２の上面で反
転して伝熱管１３に沿って上昇する。その際、熱交換に
より加熱流体１４から熱を奪い、昇温し、沸騰し、蒸気
になる。この蒸気２１は蒸気ノズル２５から流出し、例
えば蒸気タービンに向かう。2. Description of the Related Art In heat exchangers for thermal power plants, nuclear power plants, chemical plants, etc., a heat transfer tube arranged in the heat exchanger is laterally supported by a tube support plate. Carbon steel or SUS stainless steel is generally used as a constituent material of the tube support plate. FIG. 6 conceptually shows the inside of the shell-and-tube type vertical heat exchanger 10 as an example. Inside the shell-and-tube vertical heat exchanger 10, a large number of heat transfer tubes 13 are arranged to form a heat transfer tube bundle. The heat transfer tube bundles are supported by the tube support plate 18. Outer torso, shell 1
Both ends of a large number of inverted U-shaped heat transfer tubes 13 are inserted and joined to a tube plate 12 formed integrally with the tube 1. And 150 ~
The heating fluid 14 having a high temperature of 350 ° C. flows into the water chamber 15, the heating fluid 14 flows through the heat transfer tube 13, gives heat as described later to a low temperature, and flows out from the water chamber 16. A large number of heat transfer tubes 13 having different bending radii form a heat transfer tube bundle, which is surrounded by a wrapper tube 17 and laterally supported by a plurality of tube support plates 18. Then, the water supply 20 flowing in through the water supply nozzle 19 flows down between the wrapper cylinder 17 and the shell 11, reverses on the upper surface of the tube sheet 12, and rises along the heat transfer tube 13. At that time, heat is taken from the heating fluid 14 by heat exchange, the temperature is raised, the water is boiled, and vaporized. The steam 21 flows out of the steam nozzle 25 and goes to, for example, a steam turbine.
【０００３】管支持板１８は伝熱管１３を適切に支持し
得る剛性、機械的強度をもつと共に、上昇する給水２０
の流れを少ない抵抗で通さなければならない。従来よ
り、給水２０には系統から発生する錆等からなる鉄酸化
物（スケール）が含まれており、これらのスケールが次
第に管支持板１８に付着して、給水流路穴５（後述の図
１参照）の断面積を減少させることがある。The tube support plate 18 has rigidity and mechanical strength capable of properly supporting the heat transfer tube 13, and the rising water supply 20.
You have to pass the flow of with little resistance. Conventionally, the water supply 20 contains iron oxides (scales) such as rust generated from the system, and these scales gradually adhere to the pipe support plate 18 to form the water supply passage holes 5 (see the figure below). (See 1)) may be reduced.
【０００４】[0004]
【発明が解決しようとする課題】従来の熱交換器用管支
持板には、構成材料として炭素鋼、ステンレス鋼等が使
用されいる。この炭素鋼、ステンレス鋼の表面に生成す
る表面皮膜はスピネル型構造という立方晶型結晶であ
り、一方熱交換器の給水中に含まれるＦｅ3 Ｏ4 （マグ
ネタイト）なる鉄酸化物（スケール）も同じスピネル型
構造の立方晶結晶であるために、互いに結び付き易い傾
向にある。このため管支持板には、給水中の鉄が鉄酸化
物（スケール）として付着して、熱交換器の長時間の運
転を経て、その付着量が増加することを経験している。Carbon steel, stainless steel or the like is used as a constituent material in the conventional heat exchanger tube support plate. The surface film formed on the surface of this carbon steel or stainless steel is a cubic crystal called spinel structure, while iron oxide (scale) Fe 3 O 4 (magnetite) contained in the feed water of the heat exchanger is also present. Since they are cubic crystals having the same spinel type structure, they tend to easily bond with each other. Therefore, we have experienced that iron in the feed water adheres to the tube support plate as iron oxide (scale), and the adhered amount increases as the heat exchanger runs for a long time.
【０００５】伝熱管を支持している管支持板には、給水
流路として、例えば直径１５ｍｍ程度の穴が数多くあけ
られており、時間が経過するに伴って、前述したスケー
ルが該穴に付着してゆき、流路断面積を減少させること
がある。この結果として、給水流量の減少、給水流路穴
断面積の違いに基づく熱交換された給水水位が不安定に
なる等の問題を有している。A large number of holes having a diameter of, for example, about 15 mm are formed as water supply passages in the tube support plate supporting the heat transfer tubes, and the scale described above adheres to the holes as time passes. As a result, the flow passage cross-sectional area may be reduced. As a result, there are problems that the feed water flow rate decreases, the heat-exchanged feed water level becomes unstable due to the difference in cross-sectional area of the feed water passage hole, and the like.
【０００６】本発明は前記の問題を解決する手段を提案
するものであり、熱交換器の伝熱管を支持する管支持板
への鉄酸化物の付着を軽減・防止して、常に安定した１
００％出力或いはそれに極力近い出力を確保できる熱交
換器のための管支持板及びその製造方法を提供しようと
するものである。The present invention proposes a means for solving the above problems, and reduces or prevents the adhesion of iron oxides to the tube support plate that supports the heat transfer tubes of the heat exchanger, so that a stable 1
An object of the present invention is to provide a tube support plate for a heat exchanger that can secure an output of 00% or an output as close to that as possible and a method of manufacturing the same.
【０００７】[0007]
【課題を解決するための手段】本発明は（１）熱交換器
の伝熱管を支持する管支持板において、管支持板の表面
がクロムで被覆されてなることを特徴とする熱交換器用
管支持板、（２）上記（１）のクロム被覆上に、さらに
六方晶型酸化クロムを被覆してなることを特徴とする熱
交換器用管支持板、（３）給水又は蒸気の入口ノズルと
出口ノズルとを有する胴と、該胴内に配置され前記給水
又は蒸気との熱交換を行う媒体が流通する伝熱管と、か
かる伝熱管の一端と他端とにそれぞれ連通する前記胴に
設けられた入口水室と出口水室と、前記伝熱管を支持す
る上記（１）又は（２）の熱交換器用管支持板とを具備
することを特徴とする熱交換器及び（４）熱交換器用管
支持板を、鉄濃度を０．５ｇ／リットル以下に管理した
クロムメッキ浴中でクロムメッキし、該管支持板の表面
に鉄分の存在しないクロムを被覆させることを特徴とす
るスケールの付着を軽減・防止可能な熱交換器用管支持
板の製造方法である。The present invention provides (1) a tube support plate for supporting a heat transfer tube of a heat exchanger, wherein the surface of the tube support plate is covered with chromium. A support plate, (2) a tube support plate for a heat exchanger, characterized in that the above-mentioned chromium coating of (1) is further coated with hexagonal chromium oxide, (3) an inlet nozzle and an outlet for water or steam. A cylinder having a nozzle, a heat transfer tube disposed in the cylinder through which a medium for exchanging heat with the water supply or steam flows, and one end and the other end of the heat transfer tube respectively provided in the cylinder A heat exchanger, comprising: an inlet water chamber, an outlet water chamber, and the heat exchanger tube support plate of (1) or (2) for supporting the heat transfer tube, and (4) a heat exchanger tube. Support plate in chromium plating bath with iron concentration controlled to 0.5 g / liter or less Chromed, is a manufacturing method of the tube support plate surface be coated with chromium in the absence of iron allows reduce or prevent the adhesion of scale to be characterized by the heat exchanger tube support plate.
【０００８】[0008]
【発明の実施の形態】本発明の第１において、炭素鋼又
はステンレス鋼の管支持板の表面に被覆されるクロムの
厚さは５〜１００μｍが好ましく、このものは一般のク
ロムメッキによって行うことができる。また、本発明の
第２において、同じ管支持板の表面に被覆されるクロム
の厚さは上記と同じ範囲であり、さらにそのクロムを酸
化処理することによって該クロム被覆層上に被覆される
クロム被覆は六方晶型酸化クロムの厚さは０．０１〜１
μｍ程度が好ましい。この六方晶型酸化クロム被覆は先
に被覆されたクロム層を適宜酸化処理することによって
形成させることができる。本発明の第３は前記本発明の
第１或いは第２の管支持板を備えた熱交換器にかかるも
のである。また、本発明の第４は熱交換器用管支持板に
クロムをメッキ被覆するに際し、クロムメッキ浴の鉄濃
度を０．５ｇ／リットル以下に管理することによって行
うことができる。BEST MODE FOR CARRYING OUT THE INVENTION In the first aspect of the present invention, the thickness of chromium coated on the surface of a carbon steel or stainless steel tube support plate is preferably 5 to 100 μm, and this is performed by general chromium plating. You can Further, in the second aspect of the present invention, the thickness of the chromium coated on the surface of the same tube support plate is in the same range as above, and the chromium coated on the chromium coating layer by further oxidizing the chromium. The coating has a hexagonal chromium oxide thickness of 0.01 to 1
About μm is preferable. This hexagonal chromium oxide coating can be formed by appropriately oxidizing the previously coated chromium layer. The third aspect of the present invention relates to a heat exchanger provided with the first or second tube support plate of the present invention. The fourth aspect of the present invention can be carried out by coating the heat exchanger tube support plate with chromium by controlling the iron concentration in the chromium plating bath to 0.5 g / liter or less.
【０００９】（作用）本発明によれば、管支持板へ被覆
したクロムの極薄い表層面が自然に生成する六方晶型結
晶である酸化クロム層となり、又、管支持板へ被覆した
クロムを酸化処理することにより該表面に、前記の自然
に生成する酸化クロム層よりも厚い酸化クロム層が生成
されて、それら酸化クロム層が存在することにより、管
支持板への立方晶型結晶である鉄酸化物（スケール）の
付着を軽減・防止できる。その結果、スケールの管支持
板への付着に起因する管支持板の給水流路断面積の減
少、ばらつき等の面積変化を少なくし、或いは防止する
ことができ、常に安定した熱交換を達成できるようにな
る。(Operation) According to the present invention, the extremely thin surface layer of chromium coated on the tube supporting plate becomes a chromium oxide layer which is a hexagonal type crystal which naturally forms, and the chromium coating on the tube supporting plate is By the oxidation treatment, a chromium oxide layer thicker than the above-mentioned naturally generated chromium oxide layer is formed on the surface, and the presence of these chromium oxide layers makes it a cubic crystal to the tube support plate. It can reduce or prevent the adhesion of iron oxide (scale). As a result, it is possible to reduce or prevent an area change such as a decrease in the cross-sectional area of the water supply channel of the pipe support plate due to the adhesion of the scale to the pipe support plate, or to prevent it, and always achieve stable heat exchange. Like
【００１０】また、上記管支持板にメッキして形成され
たクロム中にメッキ浴から由来する鉄分が存在すると、
スケール付着の軽減・防止の効果が損なわれることとな
るが、クロムメッキ浴中の鉄分濃度が０．５ｇ／リット
ル以下となるように管理することにより、形成されたク
ロム中には鉄分が殆ど存在しなくなり、スケール付着軽
減・防止の効果を十分に奏しうるものとなる。Further, if iron derived from the plating bath is present in the chromium formed by plating the pipe supporting plate,
Although the effect of reducing / preventing scale adhesion will be impaired, by controlling the iron concentration in the chromium plating bath to be 0.5 g / liter or less, iron is almost present in the formed chromium. The effect of reducing / preventing scale adhesion can be sufficiently exerted.
【００１１】[0011]
【実施例】以下、本発明の具体的な実施例をあげ、本発
明の効果を明らかにする。EXAMPLES Hereinafter, specific examples of the present invention will be described to clarify the effects of the present invention.
【００１２】（実施例１）本発明の第１実施例を図１に
よって説明する。図１において、（ａ）は熱交換器用管
支持板の上面図、（ｂ）は（ａ）のＡ−Ａ断面図、
（ｃ）はクロム被覆管支持板の拡大断面図である。図１
の（ａ），（ｂ）において、１は熱交換器用管支持板、
４は伝熱管、５は流路穴を示し、この熱交換器内は２５
０〜３５０℃域の系統水に満たされて、熱交換が行なわ
れている。この実施例の場合には熱交換器用管支持板１
の接液部全面が図１の（ｃ）に示すようにクロム被覆層
（厚さ：２５±５μｍ）２で被覆されている。このクロ
ム被覆層２はメッキ液として硬質クロムメッキ液（サー
ゼント液）を使用し、電流密度：０．２Ａ／ｃｍ2 、温
度：５０℃、時間：１．５時間で形成されたものであ
る。(First Embodiment) A first embodiment of the present invention will be described with reference to FIG. In FIG. 1, (a) is a top view of a heat exchanger tube support plate, (b) is a sectional view taken along line AA of (a),
(C) is an enlarged sectional view of a chromium-clad tube support plate. FIG.
In (a) and (b), 1 is a tube support plate for a heat exchanger,
Reference numeral 4 is a heat transfer tube, 5 is a flow passage hole, and the inside of this heat exchanger is 25
The system water in the range of 0 to 350 ° C. is filled and heat exchange is performed. In the case of this embodiment, the tube support plate for heat exchanger 1
As shown in FIG. 1 (c), the entire surface of the liquid contacting portion is coated with a chromium coating layer (thickness: 25 ± 5 μm) 2. The chrome coating layer 2 is formed by using a hard chrome plating solution (surgent solution) as a plating solution at a current density of 0.2 A / cm 2 , temperature of 50 ° C. and time of 1.5 hours.
【００１３】上記管支持板を発電プラント給水模擬条件
下（２８５℃、６０ａｔｍ、ＮＨ3：０．５ｐｐｍ、Ｎ
2 Ｈ4 ：０．５ｐｐｍ）でマグネタイトのクロム被覆層
２への付着試験を実施した結果、マグネタイトのクロム
被覆層２への付着は殆ど認められず、これに対し、ＳＵ
Ｓ３０４は約１０倍の付着量であった。（図２参照）The above pipe support plate was used under simulated power plant water supply conditions (285 ° C., 60 atm, NH 3 : 0.5 ppm, N
2 H 4 : 0.5 ppm), the adhesion test of magnetite to the chromium coating layer 2 was carried out, and as a result, almost no adhesion of magnetite to the chromium coating layer 2 was observed.
The amount of S304 was about 10 times as much. (See Fig. 2)
【００１４】（実施例２）本発明の第２実施例を図３に
よって説明する。図３において、１は熱交換器用管支持
板、２はクロム被覆層、３は六方晶型酸化クロム層を示
す。この六方晶型酸化クロム層３は前述した図１（ｃ）
に示したクロム被覆層２を２００℃で２時間酸化するこ
とによって得られたものであり、この場合は厚さ：０．
１μｍであった。(Second Embodiment) A second embodiment of the present invention will be described with reference to FIG. In FIG. 3, 1 is a heat exchanger tube support plate, 2 is a chromium coating layer, and 3 is a hexagonal chromium oxide layer. This hexagonal chromium oxide layer 3 is shown in FIG.
It was obtained by oxidizing the chromium coating layer 2 shown in FIG. 2 at 200 ° C. for 2 hours, and in this case, the thickness:
It was 1 μm.
【００１５】上記管支持板を実施例１で説明したと同じ
条件下でマグネタイトの六方晶型酸化クロム層３への付
着試験を実施した結果、９０００時間後でもマグネタイ
トの付着は殆ど認められず、ＳＵＳ３０４の１／１５０
程度であった。The tube support plate was subjected to the adhesion test of magnetite to the hexagonal chromium oxide layer 3 under the same conditions as described in Example 1. As a result, almost no adhesion of magnetite was observed even after 9000 hours. 1/150 of SUS304
It was about.
【００１６】すなわち、実施例１の場合、２０００時間
でクロム被覆層へのマグネタイトの付着量は０．０５ｍ
ｇ／ｃｍ2 以下で、ＳＵＳ３０４への付着量（０．５２
ｍｇ／ｃｍ2 ）の約１／１０であったが、実施例２の場
合、９０００時間でも六方晶型酸化クロム層へのマグネ
タイトの付着量は１０μｇ／ｃｍ2 以下で、ＳＵＳ３０
４の付着量（１．５ｍｇ／ｃｍ2 ）の約１／１５０であ
った。That is, in the case of Example 1, the amount of magnetite deposited on the chromium coating layer was 0.05 m after 2000 hours.
Adhesion amount to SUS304 (0.52 g / cm 2 or less)
mg / cm 2) was about 1/10 of the case of Example 2, the adhesion amount of magnetite to 9000 hours even hexagonal chromium oxide layer is 10 [mu] g / cm 2 or less, SUS30
It was about 1/150 of the adhesion amount of No. 4 (1.5 mg / cm 2 ).
【００１７】（実施例３）一般的にクロムメッキ条件は
鉄濃度：６ｇ／リットル以下、電流密度：０．１〜０．
４Ａ／ｃｍ2 、温度：３０〜６０℃、無水クロム酸濃
度：２２０〜２５０ｇ／リットル、硫酸濃度：２．２〜
２．５ｇ／リットルで行われるが、ここでは鉄濃度：
０．０１ｇ／リットル、無水クロム酸濃度：２４０ｇ／
リットル、電流密度：０．２Ａ／ｃｍ2 、温度：５０
℃、時間：１時間で熱交換器用管支持板にクロムメッキ
した。この結果、生成されたクロムメッキ層には鉄分は
存在しなかった。(Example 3) Generally, chromium plating conditions are iron concentration: 6 g / liter or less, current density: 0.1 to 0.
4 A / cm 2 , temperature: 30 to 60 ° C., chromic anhydride concentration: 220 to 250 g / liter, sulfuric acid concentration: 2.2
It is carried out at 2.5 g / l, but here the iron concentration:
0.01 g / liter, chromic anhydride concentration: 240 g /
Liter, current density: 0.2 A / cm 2 , temperature: 50
Chromium plating was performed on the tube support plate for the heat exchanger at a temperature of 1 hour for 1 hour. As a result, iron was not present in the produced chromium plating layer.
【００１８】比較例として鉄濃度：６ｇ／リットルであ
る以外は上記クロムメッキ浴と同じ浴を使用し、同じ条
件で熱交換器用管支持板にクロムメッキを施した。実施
例条件、比較例の条件の結果を図４に示す。図４より、
クロムメッキ浴中の鉄濃度が０．５ｇ／リットル以下で
生成するクロムメッキ層中には鉄分の存在は認められ
ず、一方０．５ｇ／リットルを越える鉄濃度を有するク
ロムメッキ浴で生成したクロムメッキ層中には鉄分が存
在していることが判る。As a comparative example, the same bath as the above chromium plating bath was used except that the iron concentration was 6 g / liter, and the heat exchanger tube support plate was plated with chromium under the same conditions. The results of the conditions of the example and the conditions of the comparative example are shown in FIG. From FIG.
The presence of iron in the chromium plating layer produced when the iron concentration in the chromium plating bath is 0.5 g / liter or less, while the chromium produced in the chromium plating bath having an iron concentration exceeding 0.5 g / liter It can be seen that iron is present in the plated layer.
【００１９】また、実施例の条件と比較例の条件とで、
長時間実施した時に、管支持板に付着するスケールの相
対比較例を図５に示す。図５より、本発明の実施例方法
でクロムメッキした該管支持板のスケール付着量が著し
く減少することが確認された。Further, according to the condition of the embodiment and the condition of the comparative example,
FIG. 5 shows a relative comparison example of the scales attached to the tube support plate when it is carried out for a long time. From FIG. 5, it was confirmed that the scale deposition amount of the tube support plate plated with chromium by the method of the example of the present invention was remarkably reduced.
【００２０】[0020]
【発明の効果】本発明の表面処理した熱交換器用管支持
板によれば、マグネタイト等の鉄酸化物のスケール付着
をほぼ完全に防止することができ、該管支持板を備えた
熱交換器において、常に安定した熱交換を行い得る効果
が奏される。また、本発明のクロムメッキ処理条件によ
ればクロムメッキ層中には鉄分が存在せず、スケールの
付着軽減・防止効果が奏せられる熱交換器用管支持板を
製造することができる。EFFECT OF THE INVENTION According to the surface-treated tube support plate for heat exchanger of the present invention, scale adhesion of iron oxide such as magnetite can be almost completely prevented, and the heat exchanger provided with the tube support plate. In the above, there is an effect that stable heat exchange can be always performed. Further, according to the chromium plating treatment conditions of the present invention, it is possible to manufacture a heat exchanger tube support plate which has no iron content in the chromium plating layer and has the effect of reducing / preventing scale adhesion.
【図１】本発明の第１実施例の熱交換器用管支持板の上
面図、断面図及びクロム被覆管支持板の拡大断面図。FIG. 1 is a top view, a cross-sectional view of a heat exchanger tube support plate according to a first embodiment of the present invention, and an enlarged cross-sectional view of a chromium-coated tube support plate.
【図２】第１実施例のクロム被覆管支持板のマグネタイ
ト付着試験結果を示す図表。FIG. 2 is a chart showing the results of a magnetite adhesion test on the chromium-clad tube support plate of the first example.
【図３】本発明の第２実施例の酸化クロム被覆管支持板
の拡大断面図。FIG. 3 is an enlarged sectional view of a chromium oxide coated tube support plate according to a second embodiment of the present invention.
【図４】クロムメッキ浴中の鉄分濃度と生成クロムメッ
キ層中の鉄含有率を示す図表。FIG. 4 is a table showing the iron content in the chromium plating bath and the iron content in the produced chromium plating layer.
【図５】本発明の第３の実施例における鉄分を含有しな
いクロムと比較例における鉄分を含有するクロムがメッ
キされた熱交換器用管支持板に付着するスケールの比較
図表。FIG. 5 is a comparative chart of scales attached to a heat exchanger tube support plate plated with iron-free chromium in the third embodiment of the present invention and iron-containing chromium in a comparative example.
【図６】シェルアンドチューブ方式の縦型熱交換器の内
部構造を概念的に示す図表。FIG. 6 is a diagram conceptually showing the internal structure of a shell-and-tube vertical heat exchanger.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平野 廣 兵庫県神戸市兵庫区和田崎町一丁目１番１ 号 三菱重工業株式会社神戸造船所内 (72)発明者 服部 高久 兵庫県高砂市荒井町新浜２丁目１番１号 三菱重工業株式会社高砂研究所内 (72)発明者 大嶽 郁夫 兵庫県神戸市兵庫区和田崎町一丁目１番１ 号 三菱重工業株式会社神戸造船所内 (72)発明者 長恒 幹男 兵庫県神戸市兵庫区和田崎町一丁目１番１ 号 三菱重工業株式会社神戸造船所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroshi Hirano 1-1-1 Wadazaki-cho, Hyogo-ku, Kobe-shi, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Takahisa Hattori 2 Niihama, Arai-cho, Takasago-shi, Hyogo Prefecture 1-1-1, Takasago Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Ikuo Otake 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe, Hyogo Prefecture Mitsubishi Heavy Industries, Ltd., Kobe Shipyard (72) Inventor, Mikio Nagatsune Hyogo 1-1 1-1 Wadasaki-cho, Hyogo-ku, Kobe-shi, Japan Inside Mitsubishi Heavy Industries, Ltd. Kobe Shipyard
Claims (4)
おいて、管支持板の表面がクロムで被覆されてなること
を特徴とする熱交換器用管支持板。1. A tube support plate for supporting a heat transfer tube of a heat exchanger, wherein the surface of the tube support plate is coated with chrome, and the tube support plate for a heat exchanger.
より、クロム被覆上にさらに六方晶型酸化クロムを被覆
してなることを特徴とする熱交換器用管支持板。2. A tube support plate for a heat exchanger, characterized in that the chromium coating of claim 1 is further coated with hexagonal chromium oxide on the chromium coating.
とを有する胴と、該胴内に配置され前記給水又は蒸気と
の熱交換を行う媒体が流通する伝熱管と、かかる伝熱管
の一端と他端とにそれぞれ連通する前記胴に設けられた
入口水室と出口水室と、前記伝熱管を支持する請求項１
又は２の熱交換器用管支持板とを具備することを特徴と
する熱交換器。3. A cylinder having an inlet nozzle and an outlet nozzle for feed water or steam, a heat transfer tube in which a medium for exchanging heat with the feed water or steam flows, and one end of the heat transfer tube. The inlet water chamber and the outlet water chamber, which are provided in the body and communicate with the other end, respectively, and support the heat transfer tube.
Or a heat exchanger tube support plate according to item 2 above.
／リットル以下に管理したクロムメッキ浴中でクロムメ
ッキし、該支持板の表面に鉄分の存在しないクロムを被
覆させることを特徴とするスケール付着の軽減・防止可
能な熱交換器用管支持板の製造方法。4. The heat exchanger tube support plate having an iron concentration of 0.5 g
Of a tube support plate for a heat exchanger capable of reducing / preventing scale adhesion, characterized in that the surface of the support plate is coated with chrome in a chrome plating bath controlled to be less than 1 liter / liter Method.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10527596A JP3342289B2 (en) | 1996-04-25 | 1996-04-25 | Heat exchanger, heat exchanger tube support plate, and method of manufacturing the same |
| CA 2203587 CA2203587C (en) | 1996-04-25 | 1997-04-24 | A heat exchanger tube supporting plate and a process for manufacturing it |
| FR9705152A FR2748099B1 (en) | 1996-04-25 | 1997-04-25 | SUPPORT PLATE FOR HEAT EXCHANGING TUBES AND METHOD FOR THE PRODUCTION THEREOF |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10527596A JP3342289B2 (en) | 1996-04-25 | 1996-04-25 | Heat exchanger, heat exchanger tube support plate, and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09292198A true JPH09292198A (en) | 1997-11-11 |
| JP3342289B2 JP3342289B2 (en) | 2002-11-05 |
Family
ID=14403124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10527596A Expired - Lifetime JP3342289B2 (en) | 1996-04-25 | 1996-04-25 | Heat exchanger, heat exchanger tube support plate, and method of manufacturing the same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3342289B2 (en) |
| CA (1) | CA2203587C (en) |
| FR (1) | FR2748099B1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014169840A (en) * | 2013-03-05 | 2014-09-18 | Mitsubishi Heavy Ind Ltd | Heat exchanger |
| JP2015515604A (en) * | 2012-02-15 | 2015-05-28 | コリア ハイドロ アンド ニュークリア パワー カンパニー リミティッド | Sludge reduction steam generator and method for manufacturing tube sheet for sludge reduction steam generator |
| JP2016180580A (en) * | 2015-03-13 | 2016-10-13 | ゼネラル・エレクトリック・カンパニイ | Tube in cross-flow conduit heat exchanger |
| CN107782170A (en) * | 2016-08-30 | 2018-03-09 | 江苏吉华化工有限公司 | Industrial chemicals cooling device |
| KR200491627Y1 (en) * | 2019-05-18 | 2020-05-12 | 주식회사 우성에이스 | Expandable and separable heat exchanger |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110454979B (en) * | 2019-08-27 | 2023-06-23 | 浙江中广电器集团股份有限公司 | Coil pipe fixed bolster, water tank and heat pump water heater in water tank |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE713899A (en) * | 1967-04-21 | 1968-09-16 | ||
| DE2332200C3 (en) * | 1973-06-25 | 1980-10-23 | Richard 8753 Obernburg Vad | Process for producing a tube bundle heat exchanger insert coated with corrosion-inhibiting plastic |
| US4054174A (en) * | 1974-03-18 | 1977-10-18 | The Babcock & Wilcox Company | Method of inhibiting deposition of internal corrosion products in tubes |
| JPS55131198A (en) * | 1979-03-30 | 1980-10-11 | Toyo Kohan Co Ltd | Electrolytic chromic acid treating steel sheet for adhesion can |
| WO1983000381A1 (en) * | 1981-07-15 | 1983-02-03 | Turbine Metal Technology Inc | Bearing surfaces in nuclear reactor heat exchangers and the like |
| US4503099A (en) * | 1983-06-15 | 1985-03-05 | Borg-Warner Corporation | Heat transfer surfaces having scale resistant polymer coatings thereon |
-
1996
- 1996-04-25 JP JP10527596A patent/JP3342289B2/en not_active Expired - Lifetime
-
1997
- 1997-04-24 CA CA 2203587 patent/CA2203587C/en not_active Expired - Lifetime
- 1997-04-25 FR FR9705152A patent/FR2748099B1/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015515604A (en) * | 2012-02-15 | 2015-05-28 | コリア ハイドロ アンド ニュークリア パワー カンパニー リミティッド | Sludge reduction steam generator and method for manufacturing tube sheet for sludge reduction steam generator |
| JP2014169840A (en) * | 2013-03-05 | 2014-09-18 | Mitsubishi Heavy Ind Ltd | Heat exchanger |
| JP2016180580A (en) * | 2015-03-13 | 2016-10-13 | ゼネラル・エレクトリック・カンパニイ | Tube in cross-flow conduit heat exchanger |
| CN107782170A (en) * | 2016-08-30 | 2018-03-09 | 江苏吉华化工有限公司 | Industrial chemicals cooling device |
| KR200491627Y1 (en) * | 2019-05-18 | 2020-05-12 | 주식회사 우성에이스 | Expandable and separable heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2748099A1 (en) | 1997-10-31 |
| JP3342289B2 (en) | 2002-11-05 |
| CA2203587A1 (en) | 1997-10-25 |
| FR2748099B1 (en) | 2000-12-22 |
| CA2203587C (en) | 2007-01-02 |
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