JP3525299B2 - Plate heat exchanger - Google Patents
Plate heat exchangerInfo
- Publication number
- JP3525299B2 JP3525299B2 JP07046793A JP7046793A JP3525299B2 JP 3525299 B2 JP3525299 B2 JP 3525299B2 JP 07046793 A JP07046793 A JP 07046793A JP 7046793 A JP7046793 A JP 7046793A JP 3525299 B2 JP3525299 B2 JP 3525299B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- heat exchanger
- press working
- heat transfer
- transfer surface
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、プレート式熱交換器用
プレートに関し、詳しくは、プレートの接液部表面を滑
らかにし、スケールの付着の防止を計ったプレートに関
するものである。
【０００２】
【従来の技術】プレート式熱交換器に使用するプレート
(1)は、一般に、図３に示す如く、長方形状をした平板
からなり、その表面に波板状をした伝熱面(2)を有し、
４隅には、通路孔(3)が設けてある。
【０００３】また、プレート(1)上の各通路孔(3)の周囲
及び伝熱面(2)の周囲を囲む部分には、ガスケット(5)を
装着するためのガスケット溝(4)が設けてあり、このガ
スケット溝(4)にガスケット(5)を装着することにより、
図のプレートを形成する。
【０００４】そして、プレート式熱交換器の形成時に
は、図３のプレート(1)と図３のプレートを平面上で１
８０°反転させたプレートとを交互に積層し、第１流路
と第２流路とが交互に形成されたプレート式熱交換器を
形成する。
【０００５】そして、上記プレート式熱交換器の第１及
び第２流路に２種の流体を供給することにより、２種の
流体間で熱交換を行うようにしている。
【０００６】
【発明が解決しようとする課題】上記したプレート(1)
は、一般に、ステンレス鋼等を素材とする長方形状をし
た平板にプレス加工を施すことにより、波板状をした伝
熱面(2)、通路孔(3)、ガスケット溝(4)等を形成してい
る。
【０００７】ところで、上記した如く、プレス加工によ
ってプレート(1)を形成すると、この加工時に生じる引
っ張りや金属摩擦により、プレート(1)の表面に微小な
擦傷が無数に付いてしまい、図４の部分拡大断面図に示
す如く、プレート(1)の表面粗さが加工前に比べ非常に
粗くなるといった問題があった。
【０００８】そして、プレート(1)の表面が粗くなと、
このプレート(1)によってプレート式熱交換器を形成
し、処理液を流した時、プレート(1)の表面にスケール
が付着しやすくなるといった問題があった。
【０００９】本発明に係るプレート式熱交換器は、プレ
ス加工により形成された伝熱面、通路孔、ガスケット溝
を有するステンレス鋼製のプレートを積層したプレート
式熱交換器において、
【００１０】前記プレート式熱交換器のプレートが、ス
テンレス鋼製で、かつ、プレス加工後に電解研磨による
精密仕上加工を施し、プレス加工時に、伝熱面等の接液
部表面に生じた引っ張りや金属摩擦による擦傷の凹凸の
尖端部を研磨したことにより、前記接液部表面がスケー
ル付着防止機能と耐食性を備えていることを特徴とす
る。
【００１１】
【作用】上記した如く、接液部に電解研磨による精密仕
上加工を施すことにより、接液部へのスケールの付着を
防止するとともに、プレートの耐食性を向上させるもの
である。
【００１２】
【実施例】図１及び図２は、本発明に係るプレート(11)
を示すものである。
【００１３】この図に示すプレート(11)は、従来と同
様、伝熱面(12)、通路孔(13)、ガスケット(15)装着用の
ガスケット溝(14)を有しており、また、上記プレート(1
1)は、ステンレス鋼等を素材とする平板をプレス加工す
ることによって形成される。
【００１４】そして、上記プレス加工を終了したプレー
ト(11)に精密仕上加工として電解研磨を施すことによ
り、プレス加工時にプレート(11)の表面に形成された擦
傷による凹凸の尖端部を集中的に研磨し、図２に示す如
く、伝熱面(12)等の接液部表面を滑らかにする。
【００１５】上記のようにしてプレート(11)の接液部表
面を滑らかにすれば、このプレート(11)によって構成さ
れたプレート式熱交換器に処理液を流した時、プレート
(11)の伝熱面(12)等の接液部表面にスケールが付着する
のを防止できる。
【００１６】また、プレート(11)に電解研磨を施せば、
電解研磨中にプレート(11)中の鉄分が選択的に溶出する
ため、プレート(11)の耐食性も向上する。
【００１７】次に、プレス加工を終了したままのプレー
ト(1)と、プレス加工終了後、電解研磨を施したプレー
ト(11)との表面状態を比較した実験例を下記に示す。
【００１８】先ず、実験に使用したプレートは、ＳＵＳ
３１６材からなる平板をプレス加工することにより形成
したものを５枚使用し、この５枚のプレートの内４枚に
条件を変えて電解研磨を施した。
【００１９】そして、電解研磨を施した時の条件は、
Ａ．電解研磨条件
ＮＯ１：電解研磨用前処理のみ（ＳＵＳ３１６材）
ＮＯ２：通電時間：推奨値より短い（ＳＵＳ３１６材）
・・１０分
ＮＯ３：通電時間：推奨値（ＳＵＳ３１６材）・・・・
・・１５分
ＮＯ４：通電時間：推奨値より長い（ＳＵＳ３１６材）
・・３０分
ＮＯ５：プレス加工のまま（ＳＵＳ３１６材）
Ｂ．共通条件
＊前処理条件
アルカリ洗浄（脱脂）：７０℃、１０分間浸漬
酸による中和：常温、３分間浸漬
＊電解研磨条件
電 流：７〜１０Ａｍｐ／ｄｍ2
電解液の種類：硫酸燐酸混合液
電解液の温度：６０±１０℃
である。
【００２０】上記条件で電解研磨を施したプレートと、
プレス加工だけのプレートの伝熱面の表面粗さを測定す
ると、
ＮＯ１：１．２２ミクロン
ＮＯ２：１．１２ミクロン
ＮＯ３：０．８２ミクロン
ＮＯ４：０．８０ミクロン
ＮＯ５：１．２３ミクロン
となり、この実験結果からも分るように、プレート(11)
に電解研磨を施せば、プレート(11)の接液部の表面は滑
らかになり、スケールの付着防止に非常に有効である。
【００２１】尚、上記実施例は、プレス加工終了後のプ
レート(11)の接液部表面を滑らかにするための手段とし
て、電解研磨をプレート(11)に施した例について説明し
たが、接液部表面を滑らかにするための手段としては、
電解研磨以外に、化学研磨や電解メッキ等をプレート(1
1)の接液部に施すようにしてもよい。
【００２２】
【発明の効果】以下説明した如く、本発明は、前記プレ
ート式熱交換器のプレートが、ステンレス鋼製で、か
つ、プレス加工後に伝熱面等の接液部表面に電解研磨に
よる精密仕上加工が施されているので、このプレートに
よって構成されたプレート式熱交換器に処理液を流した
時、プレートの伝熱面等の接液部表面にスケールが付着
するのを防止できる。
【００２３】また、定置洗浄を行うとスケールが容易に
洗浄できるようになった。
【００２４】更に、プレートの接液部に電解研磨による
精密仕上加工を施せば、プレートの耐食性が向上するた
め、プレートの長寿命化を図ることもできる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate for a plate type heat exchanger, and more particularly, to smooth the surface of a liquid-contacting portion of the plate to prevent the adhesion of scale. It is about a plate. 2. Description of the Related Art Plates used in plate heat exchangers
(1) generally comprises a rectangular flat plate, as shown in FIG. 3, having a corrugated heat transfer surface (2) on its surface,
At the four corners, passage holes (3) are provided. Further, a gasket groove (4) for mounting a gasket (5) is provided in a portion surrounding the periphery of each passage hole (3) and the periphery of the heat transfer surface (2) on the plate (1). By installing a gasket (5) in this gasket groove (4),
Form the plate shown. When the plate heat exchanger is formed, the plate (1) of FIG. 3 and the plate of FIG.
Plates that are inverted by 80 ° are alternately stacked to form a plate heat exchanger in which first flow paths and second flow paths are alternately formed. [0005] By supplying two kinds of fluids to the first and second flow passages of the plate heat exchanger, heat is exchanged between the two kinds of fluids. [0006] The above-mentioned plate (1)
In general, by pressing a rectangular flat plate made of stainless steel etc., a corrugated heat transfer surface (2), passage holes (3), gasket grooves (4), etc. are formed are doing. By the way, as described above, when the plate (1) is formed by press working, the surface of the plate (1) suffers numerous infinitesimal scratches due to the tension and metal friction generated during this working, and FIG. As shown in the partially enlarged cross-sectional view, there was a problem that the surface roughness of the plate (1) became extremely rough as compared with that before processing. When the surface of the plate (1) is rough,
When a plate-type heat exchanger is formed by the plate (1) and the treatment liquid is flowed, there is a problem that the scale easily adheres to the surface of the plate (1). The plate type heat exchanger according to the present invention has a
Heat transfer surface, passage hole, gasket groove
Plate laminated with stainless steel plate having
In the heat exchanger of the present invention, the plate of the plate heat exchanger is made of stainless steel, and is subjected to precision finishing by electrolytic polishing after the press working, and the liquid contacting of a heat transfer surface or the like at the time of the press working.
Of irregularities due to scratches caused by pulling or metal friction on the surface of the part
The sharpened end is polished so that the surface of the wetted portion has a scale adhesion preventing function and corrosion resistance. As described above, by applying precision finishing to the wetted portion by electrolytic polishing, it is possible to prevent adhesion of scale to the wetted portion and to improve the corrosion resistance of the plate.
It is. 1 and 2 show a plate (11) according to the present invention.
It is shown. The plate (11) shown in this figure has a heat transfer surface (12), a passage hole (13), and a gasket groove (14) for mounting a gasket (15) as in the prior art. The above plate (1
1) is formed by pressing a flat plate made of stainless steel or the like. [0014] Then, by subjecting the plate (11), which has been subjected to the press working, to electrolytic polishing as a precision finishing work, the sharp edges of the scratches formed on the surface of the plate (11) during the press working are concentrated. Polishing is performed to smooth the surface of the liquid contact portion such as the heat transfer surface (12) as shown in FIG. If the surface of the liquid contact portion of the plate (11) is made smooth as described above, when the processing liquid flows through the plate heat exchanger constituted by the plate (11),
The scale can be prevented from adhering to the surface of the liquid contact portion such as the heat transfer surface (12) of (11). If the plate (11) is electropolished,
Since the iron in the plate (11) is selectively eluted during the electropolishing, the corrosion resistance of the plate (11) is also improved. Next, an experimental example in which the surface condition of the plate (1) after the completion of the press working and the plate (11) subjected to electrolytic polishing after the completion of the press working is shown below. First, the plate used for the experiment was SUS
Five plates formed by pressing a flat plate made of 316 materials were used, and four of the five plates were subjected to electrolytic polishing under different conditions. The conditions for performing the electropolishing are as follows: Electropolishing conditions NO1: Only pretreatment for electrolytic polishing (SUS316 material) NO2: Energizing time: shorter than recommended value (SUS316 material)
··· 10 minutes NO3: energizing time: recommended value (SUS316 material) ···
..15 min NO4: energizing time: longer than recommended value (SUS316 material)
..30 min NO5: As pressed (SUS316 material) Common conditions * Pretreatment conditions Alkaline cleaning (degreasing): 70 ° C, 10 minutes immersion in acid: Neutralization at room temperature for 3 minutes * Electropolishing conditions Current: 7 to 10 Amp / dm 2 Electrolyte type: Sulfuric acid phosphoric acid mixed solution Electrolyte temperature: 60 ± 10 ° C. A plate electropolished under the above conditions;
When the surface roughness of the heat transfer surface of the plate formed only by the press working is measured, NO1: 1.22 microns NO2: 1.12 microns NO3: 0.82 microns NO4: 0.80 microns NO5: 1.23 microns As can be seen from the experimental results, plate (11)
When electropolishing is performed on the surface of the plate (11), the surface of the liquid contact portion of the plate (11) is smoothed, which is very effective in preventing scale adhesion. In the above-described embodiment, an example in which electrolytic polishing is applied to the plate (11) as a means for smoothing the surface of the liquid contact portion of the plate (11) after the press working is described. As means to smooth the liquid surface,
In addition to electrolytic polishing, chemical polishing, electrolytic plating, etc.
You may make it apply to the liquid contact part of 1). As described below, the present invention relates to the above-described prepress.
The heat exchanger plate is made of stainless steel.
After pressing, electrolytic polishing is applied to the surface of wetted parts such as the heat transfer surface.
Since the precision finishing process is performed, it is possible to prevent the scale from adhering to the surface of the liquid-contacting portion such as the heat transfer surface of the plate when the processing liquid flows through the plate-type heat exchanger constituted by the plate. . Further, the scale can be easily cleaned by performing the stationary cleaning. Further, if the liquid contacting portion of the plate is subjected to precision finishing by electrolytic polishing , the corrosion resistance of the plate is improved, and the life of the plate can be extended.
【図面の簡単な説明】 【図１】本発明に係るプレートを示す平面図。 【図２】図１のＡ−Ａ線に沿う拡大断面図。 【図３】プレートの従来例を示す平面図。 【図４】図３のＢ−Ｂ線に沿う拡大断面図。 【符号の説明】 １１ プレート １２ 伝熱面 １３ 通路孔 １４ ガスケット溝[Brief description of the drawings] FIG. 1 is a plan view showing a plate according to the present invention. FIG. 2 is an enlarged sectional view taken along line AA of FIG. FIG. 3 is a plan view showing a conventional example of a plate. FIG. 4 is an enlarged sectional view taken along the line BB of FIG. 3; [Explanation of symbols] 11 plates 12 Heat transfer surface 13 Passage hole 14 Gasket groove
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−244289（ＪＰ，Ａ) 特公 平４−6702（ＪＰ，Ｂ２) 木本康雄外４名著「ステンレス鋼の電 解複合鏡面研摩」電気加工学会誌 社団 法人電気加工学会 1978年９月30日 第 12巻，第23号 ｐ１〜11 (58)調査した分野(Int.Cl.7，ＤＢ名) F28F 19/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-244289 (JP, A) JP-B-4-6702 (JP, B2) Yasuo Kimoto, Four Electrolytic Composite Mirror Polishing of Stainless Steel Journal of the Institute of Electrical Machining Engineers The Institute of Electrical Machining Engineers September 30, 1978 Volume 12, No. 23, p1-11 (58) Fields investigated (Int. Cl. 7 , DB name) F28F 19/00
Claims (1)
路孔、ガスケット溝を有するプレートを積層したプレー
ト式熱交換器において、 前記プレート式熱交換器のプレートが、ステンレス鋼製
で、かつ、プレス加工後に電解研磨による精密仕上加工
を施し、プレス加工時に、伝熱面等の接液部表面に生じ
た引っ張りや金属摩擦による擦傷の凹凸の尖端部を研磨
したことにより、前記接液部表面がスケール付着防止機
能と耐食性を備えていることを特徴とするプレート式熱
交換器。(57) [Claim 1] In a plate heat exchanger in which plates having a heat transfer surface, a passage hole, and a gasket groove formed by press working are laminated, a plate of the plate heat exchanger is provided. Is made of stainless steel, and is precision finished by electrolytic polishing after press working
Is applied to the surface of the wetted parts such as the heat transfer surface during press working.
Grinds the sharp edges of scratches caused by pulling or metal friction
Thus , the plate-type heat exchanger is characterized in that the liquid contacting part surface has a scale adhesion preventing function and corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07046793A JP3525299B2 (en) | 1993-03-29 | 1993-03-29 | Plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07046793A JP3525299B2 (en) | 1993-03-29 | 1993-03-29 | Plate heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06281388A JPH06281388A (en) | 1994-10-07 |
| JP3525299B2 true JP3525299B2 (en) | 2004-05-10 |
Family
ID=13432361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07046793A Expired - Fee Related JP3525299B2 (en) | 1993-03-29 | 1993-03-29 | Plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3525299B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU627895B2 (en) * | 1989-06-22 | 1992-09-03 | Toyama Chemical Co. Ltd. | Novel penam derivatives and salts thereof, processes for producing the same and antibacterial agent comprising the same |
-
1993
- 1993-03-29 JP JP07046793A patent/JP3525299B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 木本康雄外４名著「ステンレス鋼の電解複合鏡面研摩」電気加工学会誌 社団法人電気加工学会 １９７８年９月３０日 第１２巻，第２３号 ｐ１〜１１ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06281388A (en) | 1994-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH07224400A (en) | Method of electrochemically roughening surface | |
| JP4516761B2 (en) | Aluminum plate embossing roll | |
| JP4410714B2 (en) | Method for producing support for lithographic printing plate | |
| CA1275068A (en) | Process for the electrochemical roughening of aluminum for use in printing plate supports | |
| JP3525299B2 (en) | Plate heat exchanger | |
| JPWO2009122882A1 (en) | Method for producing support for lithographic printing plate | |
| JP4522565B2 (en) | Electropolishing apparatus and deburring method for metal workpiece having press burr | |
| US8142841B2 (en) | Apparatus and methods for deoxidizing metal surfaces | |
| JP3463772B2 (en) | Electropolishing method and method for manufacturing lead frame using the same | |
| JP2006076104A (en) | Method for manufacturing support for lithographic printing plate | |
| JP3202447B2 (en) | Method for forming anodized film on aluminum alloy parts | |
| JPH0535240B2 (en) | ||
| JP4510570B2 (en) | Method for producing support for lithographic printing plate | |
| JP2006076105A (en) | Method for manufacturing support for lithographic printing plate | |
| JP2000088491A (en) | Plate type heat exchanger | |
| JP2000043441A (en) | Manufacture and aluminum support for lithographic printing plate and polishing method of aluminum plate | |
| KR20220082818A (en) | Metalworking parts, component mounting module including same, and manufacturing method thereof | |
| JP2000301850A (en) | Manufacture of aluminum support for lithographic printing plate | |
| JPH09234971A (en) | Manufacture of lithographic printing palate aluminum support | |
| JPH058044A (en) | Welding method for clad steel plates | |
| JPH01294872A (en) | Base conditioning solution for film forming chemical treatment of aluminum alloy | |
| JPS63176497A (en) | Anticorrosive laminated aluminum sheet | |
| JPH02186000A (en) | Polishing solution common to aluminum and stainless steel | |
| JPH0892784A (en) | Energizing device | |
| JPS62180090A (en) | Method for pickling one side of steel sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20020318 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040204 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090227 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100227 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100227 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110227 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110227 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120227 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130227 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |