珮旂 發問時間: 社會與文化語言 · 9 年前

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Fault Cause

External leakage was confirmed along the length of the unit close to port3. Green copper patina was found at the leakage area as well as inside the unit at the same area. The brazed seams near the leakage area were corroded and this resulted in a gap in the channel plates.

There were corroded brazing points between the two lowest channels plates and this resulted in a large swelling on the bottom cover plate. The conclusion of this investigation is that the leakage was due to general copper corrosion.

Corrective Actions

When cooper corrodes, Its more often degraded by general corrosion than pitting. General copper corrosion will most probably attack copper exposed to ammonia or fluid with high sulphur content. Another threat to copper is the presence of dissolved salts in the fluid that affect the BPHE(某型號熱交換器). Copper is more sensitive in an alkaline environment.

The water's pH value should be maintained between 7.5 and 9.0. The electrical conductivity should be maintained within the recommended range. SWEP's nickel-brazed units can also be a suitable option for such applications as nickel is resistant to high sulphur and ammonia contents.

Stable and turbulent water flow doesn't give the substances the time needed to initiate to corrosion process. Its therefore important to maintain a stable water flow to avoid stagnant zones within the BPHE.

For the same reason, its adviseable to rinse and dry the BPHE carefully before a long standby.

A srrainer with a size of 16~20 mesh( nember of openings per inch) MUSTbe installed before each inlet of the heat exchanger. Smaller particles will pass through the heat exchanger due to the high turbulent flow withing the BPHE.

Considering the findings of the claim, its highly recommended that analysis on the water is conducted.

3 個解答

評分
  • 9 年前
    最佳解答

    Fault Cause 損壞原因 (大意)

    The conclusion of this investigation is that the leakage was due to general copper corrosion.

    調查結果顯示漏水的主要原因是銅材腐蝕

    Corrective Actions 矯正做法 (大意)

    The water's pH value should be maintained between 7.5 and 9.0.

    水質酸鹼度ph7.5-9

    The electrical conductivity should be maintained within the recommended range.

    水質導電性維持在建議值內

    SWEP's nickel-brazed units can also be a suitable option

    選用SWEP's鎳表面材質組件

    Its therefore important to maintain a stable water flow to avoid stagnant zones within the BPHE.

    保持水流暢通,停用一段時期後要清洗

    A srrainer with a size of 16~20 mesh( nember of openings per inch) MUSTbe installed before each inlet of the heat exchanger.

    入水口裝16~20 mesh濾網

    its highly recommended that analysis on the water is conducted.

    做水質檢驗(主要針對氨,硫,鹽)

  • Chris
    Lv 7
    9 年前

    (造成)缺誤的原因

    已確定外部漏水發生在延著產品長靠近第3門處 漏水部位內外均發現綠色銅鏽

    靠近漏水處的銅接縫腐蝕導致水通道的金屬板有一條溝

    在最下面的兩片金屬板之間有銅的生鏽點而導致底蓋的金屬板大大凸起澎漲

    此調查的結論是漏水起因於一般的銅腐蝕

    更正錯誤的措施

    當銅腐蝕時 銅多半是腐蝕而崩退 銅腐蝕非常可能侵襲有接觸到氨(安摩尼亞)或含有高硫成分液體的銅 另外一項對銅有威脅的是BPHE內裝的液體溶有鹽分 銅對鹼性環境較敏感

    水的酸鹼值應維持於7.5-9.0之間 導電率應維持在建議範圍內 SWEP的鎳銅合金也是一個合適的選擇 因為鎳可以抵抗高硫及氨成分

    穩定流通的水流可防止這些物質有足夠時間開始腐蝕的過程 所以保持穩定流通的水流以防止BPHE內產生沉澱區很重要

    也因為如此 長期不使用時 應該仔細的把BPHE清洗乾淨並晾乾 (才不會積水而生鏽)

    每次灌注熱交換器時一定要安置一個16-20 網目(一英吋所含網洞數)的過濾器

    BPHE內的強力水流會使微小雜質通過熱交換器

    考慮各項發現 強烈建議進行水質的分析

    註: 應你要求做以上翻譯 希望對你有所幫助 也希望事情順利解決

  • 阿昌
    Lv 7
    9 年前

    故障原因

    外部洩漏證實了沿長度單位接近端口3。綠色銅銅綠被發現在洩漏區域,以及在同一區域內的單位。洩漏區附近的釬焊接縫被腐蝕,這導致在通道板的差距。

    有腐蝕釬焊點之間最低的兩個通道板,這導致在底部蓋板上的大腫。本次調查的結論是,洩漏是由於一般的銅腐蝕。

    糾正行動

    當庫珀腐蝕,更往往比一般腐蝕退化蝕。一般銅片腐蝕,很可能會攻擊暴露含硫量高,銅氨或液體。另一個威脅是銅的溶解鹽類流體中的存在,影響(某型號熱交換器)。銅是在鹼性環境更敏感。

    水的pH值應保持在7.5和9.0之間。電導率應保持在推薦範圍內。舒瑞普的鎳釬焊的單位,也可以是一個適合這種應用的選擇,因為鎳是耐高硫和氨的含量。

    穩定和湍急的水流流不給物質的腐蝕過程啟動所需的時間。其所以重要的是保持一個穩定的水流量,以避免在積水區。

    出於同樣的原因,其推薦用來沖洗和乾燥前,超長待機某型號熱交換器仔細。

    每個熱交換器的入口前安裝一個大小為16〜20目(每英寸的開口大數)必須是過濾器。更小的粒子將通過熱交換器,由於高湍流流內的某型號熱交換器。

    考慮到索賠的結果,其強烈建議在水面上分析進行。

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