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水處理行業中制水量與溫度有關系嗎?

文章出處:admin 人氣:發表時間:2019-11-14

滲源超純水機在產品介紹處會指明在溫度為25攝氏度時的水機產水量為標準產水量,水溫每下降一度,則產水量下降3%左右,但是為何實驗室超純水機會受到溫度的影響呢?


  實驗室純水機、超純水機以及中央制備純水工程設備制備純水的主要工藝為反滲透加離子交換,紫外殺菌等,其核心部件反滲透膜的實際產水量受溫度有所影響。實驗室純水超純水機設備制水量是按反滲透膜在25℃進水溫度下的標準產水量來標注的。因此,在選擇實驗室超純水機反滲透純水設備時,考慮到冬季水溫較低,以及反滲透膜投入使用后水通量會逐漸降低的影響因素,務必放大需求產水量至設備標稱產水量的1.5~2倍考慮。


溫度對反滲透膜產水量的影響如下圖所示:

 

溫度制水影響

 

溫度變低,水的粘度增加,水的擴散性減弱,產水量也隨著溫度下降而降低。在同一壓力下,溫度下降1攝氏度,產水量可減小3~4%。下列方程是產水通量隨溫度變化的關系。TCF=exp[K×(1÷(273+t)-1÷298](其中TCF是溫度校正因子,K是膜材料常數,t是進水攝氏溫度。該方程將25℃作為基準,TCF=1。)

 

此文關鍵詞:水處理行業中制水量與溫度有關系嗎?
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