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燃气蒸汽联合循环发电厂

许多现代发电厂都是燃气蒸汽联合循环发电厂。第一步，燃气轮机发电。燃气轮机排出的热废气被送入带有另一个蒸汽轮机的传统锅炉系统之中，从而确保极高的整体效率。在以上原理示意图中标出了 pH、Cond 和 DO 的测量回路。

主要应用概况

领域

联合运行的发电厂

Application

[Proc] What is produced: Raw material, reaction, product, waste materials, hazardous materials 

[App] [location of measuring point] in [installation situation(pipe/tank/reactor) in [process step]. What are the measured values used for; how often is measured


测量参数

pH、电导率和溶解氧

主要要求

需要在难以接近的角落进行测量，以防止

  • 蒸汽回路中形成沉积物，
  • 损坏管道系统和汽轮机/转子，
  • 形成生物膜。

在锅炉给水、蒸汽和冷凝水中进行测量

应用说明

根据美国电力研究院 EPRI（Electric Power Research Institute）、美国机械工程师协会 ASME（American Society of Mechanical Engineers）、荷兰 NEM（NEM Energy (Siemens)）、德国能源工厂运营商协会 VGB、德国技术监督协会 TÜV 的规范监测锅炉给水极限值

应用的要求

在该过程中必须在很低的测量范围内监测电导率，这对测量技术提出了极高的要求。要监测 pH 值是否保持很窄的值范围。溶解氧是防止回路中发生腐蚀的一个重要指标，腐蚀会造成代价高昂的严重财产损失。
因此，所有三个参数的测量精度是实现高效且无损运行的决定性因素。

为何选择 Knick？
凭借在能源领域多年的过程分析经验、广泛的适用产品（如用于安装导轨的流通式连接件或紧凑型测量变送器）及其设备的多种用途，Knick 能够针对各个测量回路的要求轻松调整解决方案，并且经济高效。

相关产品

跳过产品库
MemoRail A1401 Compact Multiparameter Transmitter | Memosens Sensors | 2x 4…20 mA Passive Output | Broad-range power supply
MemoRail A1401 Compact Multiparameter Transmitter | Memosens Sensors | 2x 4…20 mA Passive Output | Broad-range power supply
产品编号：

A1401N-P1-41

SE740 光学氧传感器 | M12（8 针） | 215 mm | 适用于卫生要求较高的区域
SE740 光学氧传感器 | M12（8 针） | 215 mm | 适用于卫生要求较高的区域
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SE740/2

Glass electrode for pH measurement SE558X/*-NMSN-B1 with Memosens
SE558 pH 传感器 | Memosens | 120 mm | 防爆 | 适用于超纯水、水和工艺化学
产品编号：

SE558X/1-NMSN-B1

SE604 两电极电导率传感器 | Memosens | 超纯水测量范围最高 500 μS/cm
SE604 两电极电导率传感器 | Memosens | 超纯水测量范围最高 500 μS/cm
产品编号：

SE604-MS

ARF200 流通式连接件 | 不锈钢或哈氏合金 C22 | 一个传感器 | 过程接口为卡套式管接头
ARF200 流通式连接件 | 不锈钢或哈氏合金 C22 | 一个传感器 | 过程接口为卡套式管接头
产品编号：

ARF200

相关工业和应用

能源
在发电厂中，水用于许多具有完全不同要求的过程，例如用来产生蒸汽、冷却和净化烟气。
离子交换系统
测量锅炉给水中的 pH 值、溶解氧和电导率，发电厂联合循环燃气轮机中的蒸汽和冷凝水。
锅炉给水回路
测量作为锅炉给水回路主要参数的 pH 值、溶解氧和电导率。
冷却水系统
测量必须持续使用酸和生物杀灭剂处理的冷却水中的 pH 值、氧化还原电位和电导率。
监测蒸汽发生器
蒸汽发生器具有关键应用功能，而停机或更换蒸汽发生器的成本极高，因此要通过监测水质来预防磨损引起的损坏。
烟气脱硫
测量发电厂烟气脱硫过程中的预洗涤塔、中和塔和石灰洗涤塔中的 pH 值。
水处理系统
在发电厂废水处理过程的各种应用中测量 pH 值、溶解氧和氧化还原电位。
能源工业手册


发电厂各领域的具体应用和产品解决方案概览。

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