过程分析

锅炉给水回路

锅炉给水是所有蒸汽轮机的重要介质。利用反渗透和离子交换器制备给水。在锅炉中使其变为驱动涡轮机的水蒸气。给水必须有很高的纯度，以避免涡轮机中发生腐蚀和结垢。涡轮机损坏是传统发电厂中可能发生的成本最高的事故。

能源

主要应用概况

领域

锅炉给水回路

应用

多个测量回路上的 3 种应用（1. 检查溶解氧 DO，2. 检查 pH 值和电导率，3. 检查电导率）

测量参数

pH、电导率和氧化还原

主要要求

低离子浓度

双重电导率测量，以便精确计算 pH 值

在锅炉给水、蒸汽和冷凝水中测量

应用说明

给水/冷凝水的纯度标准是电导率、pH 和溶解氧。在原理图中列出了溶解氧、比电导率 (SC)、阳离子电导率 (CC)、脱气电导率 (DAC) 和 pH 的标准测量点。如果冷凝水回流不符合规范，则必须将其排出。pH 和电导率是进入汽轮机之前的重要锅炉给水参数。

大多数情况下借助双重电导率测量来计算 pH 和比电导率。pH 和电导率是重要的冷凝水参数（在通过汽轮机之后）。通常使用双通道电导率测量来计算 pH、比电导率 (SC)、阳离子电导率 (CA) 和脱气电导率 (DAC)。

由于空气中的 CO₂ 会提高电导率，因此脱气电导率是表示纯度的一个重要标准。

应用的要求

挑战在于介质的离子浓度很低，需要双重电导率测量来精确计算 pH 值。

为何选择 Knick？
该应用的挑战在于离子浓度低，通常要定量加入胺来防止腐蚀。然而根据电导率定量加入胺并非轻而易举，这需要监测 pH 值，考虑到离子含量很低，很难做到。比较简单的做法是借助双重电导率测量来精确计算 pH 值。Stratos Multi 非常适合该应用，因为双重电导率测量可以轻松与 DO 测量相结合，实现最佳的过程监测。

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锅炉给水回路

锅炉给水回路

主要应用概况

领域

应用

测量参数

主要要求

在锅炉给水、蒸汽和冷凝水中测量

相关产品

相关工业和应用

最新博客文章

Uniclean 700 Series - Modular control system for automated sensor cleaning

Knick Austria - direct customer contact in Austria from 2024

Robust WA111 Retractable Fitting Made of Plastic for Highly Corrosive Operating Conditions

成功的聯合專案：尼克公司開發了特殊的塞拉馬特 WA 155 可伸縮配件，用於 SOPAT 的光學探頭

pH and conductivity measurement in vaccine production

Sturdy 2-Electrodes Conductivity Sensor SE625 with Coaxial Electrodes made of Titanium

Sensor Adapter with Lock Function Enables Safe and Thorough Cleaning

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