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YaHei;font-size:14px;color:#333333;line-height:1.5;">一、鍋爐化學(xué)清洗的必要性：</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　目前新建鍋爐在運行前都應進(jìn)行化學(xué)清洗，以清除設備在制造加工過(guò)程中形成的高溫氧化軋皮和帶硅氧化皮，以及在存放、運輸、安裝過(guò)程中所產(chǎn)生的腐蝕產(chǎn)物、焊渣帶入的泥沙、油脂涂層、污染物等。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　實(shí)踐證明，新建鍋爐如啟動(dòng)前不進(jìn)行化學(xué)清洗，水、汽系統內的各種雜質(zhì)和附著(zhù)物在鍋爐投運后會(huì )產(chǎn)生以下危害：</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　1. 直接妨礙管壁的傳熱或導致水垢的產(chǎn)生，使爐管金屬過(guò)熱和損壞，縮短鍋爐的使用壽命。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　2. 促使鍋爐在運行中發(fā)生沉積物的腐蝕，致使爐管變薄、穿孔而引起爆管。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　3. 在爐水中形成碎片和沉渣，從而引起爐管堵塞或破壞正常的汽、水流動(dòng)的工藝。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　4. 使爐水的含硅量、含鐵量等水質(zhì)指標長(cháng)期不合格，延長(cháng)了機組的啟動(dòng)時(shí)間，危害汽輪機的正常運行。相反，新建鍋爐啟動(dòng)前進(jìn)行化學(xué)清洗，不僅有利于鍋爐的安全運行，還能夠改善鍋爐啟動(dòng)　　階段的水汽質(zhì)量，使之較快達到正常標準，從而大大縮短機組啟動(dòng)到正常運行時(shí)間。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　當機組投入運行后，由于固形物隨水帶入鍋爐，造成某些不溶物發(fā)生沉積，如不及時(shí)除去，沉積物會(huì )在爐內累積，這樣一方面影響鍋爐的熱效率，另一方面也影響了鍋爐的安全進(jìn)行，嚴重時(shí)會(huì )發(fā)生鍋爐大面積的爆管。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　運行鍋爐化學(xué)清洗的目的在于除去運行鍋爐金屬受熱面上積聚的氧化鐵垢、鈣鎂水垢、銅垢、硅酸鹽垢和油垢等。以免鍋內沉積物過(guò)多而影響鍋爐的安全運行。</span> </p> <p> <br /> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">二、泰州市邦盛清洗有限公司鍋爐清洗質(zhì)量指標</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　達到DL/T794《火力發(fā)電廠(chǎng)鍋爐化學(xué)清洗規則》（技術(shù)）。HG/T2387-92《工業(yè)設備化學(xué)清洗質(zhì)量標準》。GB8978《污水綜合排放標準》等標準。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　1. 清洗后的金屬表面應清潔，基本上無(wú)殘留氧化物和焊渣，無(wú)明顯金屬粗晶析出的過(guò)洗現象，不應有鍍銅現象。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　2. 用腐蝕指示電測量的金屬平均腐蝕速度應小于8 g/(m2·h)。腐蝕總量應小于80g/ m2,除垢率不小于90%的合格，除垢率不小于95%為優(yōu)良。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　3. 清洗后的金屬表面應形成良好的鈍化保護膜，不應出現二次銹蝕和點(diǎn)蝕。</span> </p> <p> <span style="font-family:Microsoft YaHei;font-size:14px;color:#333333;line-height:1.5;">　　4. 固定設備上的閥門(mén)、儀表等不應受到損傷。</span> </p> </div> <div class="yo0saki" id="info_CommonContent" class="display_content"> </div> <div id="yo0saki" class="clear"></div> <dl class="diplay_foot clearfix"> <dt><a 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