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旋膜式除氧器在一定條件下適當(dāng)增加溶解氧,緩解氧腐蝕,并適當(dāng)提高給水PH值,消除CO2腐蝕

發(fā)布時間:2025-02-16 01:24:11瀏覽數(shù):

旋膜式除氧器凝結(jié)水在流經(jīng)負(fù)壓系統(tǒng)時,在密閉不嚴(yán)處會有空氣露入凝結(jié)水中,加之凝結(jié)水補(bǔ)給水中也含有一定量的空氣,這部分氣體在滿足一定條件下,不僅會腐蝕系統(tǒng)中的設(shè)備,而且使加熱器及鍋爐的換熱能力降低。為了防止給水系統(tǒng)的腐蝕,主要的方法是減少給水中的溶解氧,或在一定條件下適當(dāng)增加溶解氧,緩解氧腐蝕,并適當(dāng)提高給水PH值,消除CO2腐蝕。
  旋膜式除氧器除氧方法分為化學(xué)除氧和熱力除氧兩種,電廠常用以熱力除氧為主,化學(xué)除氧為輔的方法進(jìn)行除氧。除氧器是利用熱力除氧原理進(jìn)行工作的混合式加熱器,既能解析除去給水中的溶解氣體;又能儲存一定量給水,緩解凝結(jié)水與給水的流量不平衡。在熱力系統(tǒng)設(shè)計時,也用除氧器回收高遙遙的疏水。
  機(jī)組正常運(yùn)行時,采用加氨、加氧聯(lián)合水處理方式(即CWT工況),這時除氧器完成加熱器的作用,并除去其它水融遙遙氣體;而在啟動階段或水質(zhì)異常的情況下,采用給水加氨、加聯(lián)胺處理(即AVT工況),降低水中的氧含量,減緩氧腐蝕,這時除氧器既完成加熱給水的功能,又起到除氧的作用。
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旋膜式除氧器在一定條件下適當(dāng)增加溶解氧,緩解氧腐蝕,并適當(dāng)提高給水PH值,消除CO2腐蝕_連靈動生產(chǎn)廠家Copyright ? 2012-2025 連云港靈動機(jī)電設(shè)備有限公司 版權(quán)所有

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