Boiler Leak Detection and Ion Exchange Resin Monitoring at Power Station

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Introduction

Seawater leak detection is one of the post-condensation water quality management processes that are performed for power station boilers and similar facilities. Damage to the ion exchange resin, which deionizes the supplied water, is also monitored during this process, and both of these applications are executed by a conductivity analyzer.

Expected Benefits

  • Detects seawater leakage and ion exchange resin damage
  • Reduces operating cost

Process Overview

Boiler Water Quality Management Process

Boiler Water Quality Management Process

The above illustration shows where analyzers are used in the boiler water quality management process.

In the measurement point iab-app-x-en.gif shown in the figure, two different signal ranges are needed for deionized water management and seawater leak detection. The SC450 can simultaneously generate output signals for two different ranges, meaning that a single unit can perform deionized water management concurrently with seawater leak detection.

Other applications for this conductivity analyzer include the management of deionized boiler water.

Solution Details

iab-app-ionexchange-002r2.gif

Measurement system 4-wire conductivity system
Converter SC450G-A-☐
Sensor SC4A(J)-S-AD-09-002-☐☐-T1/PS
General Specifications
SC450G 4-wire Conductivity Converter
Measuring range (at process temperature; C: cell constant)
[Conductivity] Minimum: 0 µ/cm
Maximum: 200 mS/cm x C (overrange: 1999 mS/cm)
[Resistivity] Minimum: 0.005 kΩ/C
Maximum: 999 MΩ·cm
[Temperature] Pt1000: -20 to +250°C
Output setting range
[Conductivity] Minimum: 0.010 µS/cm
Maximum: 1999 mS/cm
[Resistivity] Minimum: 0.001 kΩ·cm
Maximum: 999 MΩ·cm
[Temperature] Min. span: 25°C; Max. span: 250°C
Output signal: two outputs of 4-20 mA DC
Construction: for outdoor installation, IP66, NEMA 4X waterproof
Ambient operating temperature: -20 to +55°C
Power supply voltage: 90 to 264 V AC, 50/60 Hz
Power consumption: 15 VA maximum
SC4A(J) Conductivity Sensor
Electrode system: two-electrode system
Cell constant: 0.02 cm-1
Measuring range: 0 – 0.5 µS/cm to 0 – 200 µS/cm
Temperature range: 0 - 110°C
Wetted material: SUS316L, PEEK (polyether ether ketone) /PS Adapter (option code of SC4A(J))
Material: SUS316L
Operating pressure: 1 MPa maximum (depends on the SC4A(J) Sensor)

Industrien

Zugehörige Produkte & Lösungen

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Die Analysatoren der FLEXA-Serie werden für kontinuierliche Online-Messungen in industriellen Anlagen verwendet. Mit der Option für die Ein- oder Zwei-Sensor-Messung sind sie die flexibelsten 2-Leiter-Analysegeräte auf dem Markt.

Konduktive Leitfähigkeitssensoren SC42/SC4A(J)

Die Messung der spezifischen Leitfähigkeit in wässrigen Lösungen wird immer wichtiger für die Bestimmung von Verunreinigungen im Wasser.  Yokogawa hat ein vollständiges Programm an Präzisionssensoren und -instrumenten entwickelt, um diese Messungen auch unter extremen Bedingungen zuverlässig durchführen zu können.

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