过程分析
反渗透系统
反渗透系统
在许多工业应用中将反渗透系统用于水处理。反渗透技术不仅能从中滤出溶解盐，还能去除污染，甚至能去除纳米颗粒（细菌和病毒）。该过程可用于为发电厂和药物生产提供超纯水，以及用于饮用水处理和海水淡化。
主要应用概况
领域
反渗透系统
应用
3 种应用（1. 用于检查渗透水质的 pH 回路，2. 用于检查模块泄漏的 Cond 回路，3. 用于检查浓水的 ORP 回路）
测量参数
pH、电导率和氧化还原
主要应用
在线测量 pH 值、ORP 和电导率
在超纯水和浓水中进行测量
应用说明
在发电厂中将反渗透系统用于生产锅炉给水来产生蒸汽。简图所示为采用反渗透技术的典型锅炉给水系统。必须在每个反渗透步骤之后，在每个反渗透分段的主集管中监测 pH 值、氧化还原电位和电导率。
应用的要求
反渗透监测系统需要在线测量 pH 值、氧化还原电位和电导率。在该过程中加入各种化学品，防止有机或无机沉积物附着在渗透膜上。剂量不精确可能会损坏渗透膜并有利于生物生长。后果：必须将系统关机进行清洗，费用昂贵。能够测量微西门子范围内的电导率和氧化还原电位与 pH 值的给定值偏差，是延长渗透膜使用寿命和节省过早更换费用的重要前提条件。如果精确检测电导率、pH 值和氧化还原电位，就能大幅减少氯和亚硫酸氢钠等化学品的用量。
相关工业和应用
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2月 2018
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Sensors as the direct interface to the process must be exactly matched to the chemistry of the measured medium and to the prevailing pressure and temperature conditions.
4月 2017
Process Analytics
Powerful compact analyzer boosts performance while reducing costs
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Process Analytics
High-Precision Conductivity Measurement at Extreme Temperature Differences
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Process Analytics
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