Description

Measurement of feed water conditioning chemicals

Requirements

  • Chemical resistance

Description

Strainer resistance measurement

Requirements

  • Process control

Description

Level measurement of feed water treatement chemicals

Requirements

  • Chemical resistance

Description

Flow measurement of make up water

Requirements

  • Low conductivity
  • Process control

Description

Level measurement in Ion exchanger

Requirements

  • Process control

Description

Condenser level measurement

Requirements

  • Diaphram seals
  • Chemical resistivity
  • Vacuum service

Description

Differential pressure measurement across Ion exchanger

Requirements

  • Process control
  • Diaphram seals

Description

Strainer resistance measurement

Requirements

  • Process control

Description

Conductivity measurement of polished condensate

Requirements

  • Low conductivity
  • High temperature

Description

PH measurement of polished condensate

Requirements

  • Low conductivity
  • High temperature

Description

Level measurement of chemical treatment tank

Requirements

  • Chemical resistance

Description

Strainer resistance measurement

Requirements

  • Process control

Description

Chlorine measurement for biocide dosing

Requirements

  • PH corrected chlorine measurement
  • Low maintanance

Description

Temperature measurement of cooling water

Requirements

  • Process control

Description

Level measurement of polished water tank

Requirements

  • Low conductivity
  • No maintanance

Description

Polished condensate flow measurement

Requirements

  • Low conductivity
  • Process control

Description

Flow measurement of pegging steam for deaerator

Requirements

  • Process control

Description

Polished condensate flow measurement

Requirements

  • Low conductivity
  • Process control

Description

Pressure measurement of polished condensate

Requirements

  • Low conductivity
  • Process control

Description

Level measurement of bypass deaerator

Requirements

  • Process control

Description

Deaerator pressure measurement

Requirements

  • Process control

Overview

Balance of plant in combined cycle power plant

Instrumentation in BOP applications

The condenser is designed for receiving and safely condensing all steam flows, including steam flows from the steam bypasses and drains, where low temperatures and pressures maintain good efficiency in the Rankine process. The condensate is led to the condensate system.

Cooling Water System

A raw water system supplies make-up water to the main cooling water system which circulates to meet all the steam condensing and auxiliary water requirements of the power plant.

Cooling Tower

The cooling towers are designed to cool the heated water to the required design temperature when the steam turbine is operating at full guaranteed output.

Auxiliary and Closed Cooling Water Systems

These systems consist of an open cooling water circuit taking rejected heat via water/water cooled from a closed secondary cooling circuit. The coolant in the primary circuit is tapped off the main cooling water system.

Water Treatment System

Water treatment systems control the water intake, water quality and re-generation. The prime function of the water treatment system is to achieve a treated water quality in accordance with VGB guidelines or equivalent internationally recognised standards/guidelines, to meet the steam turbine quality requirements.

Deaerator system

The dissolved non-condensable gases normally present in the condensate cause many corrosion problems. The de-aeration and storage functions, combined here in one vessel, are designed to remove such non-condensable gases as oxygen and carbon dioxide from the plant condensate, and any supplementary make-up water, to achieve the quality required.

The condensate has low conductivity and can be measured by KROHNE OPTIBAR DP flowmeters or OPTISONC 3400 ultrasonic flowmeters. Many tank levels in the condensate system need to be monitored and controlled. This can be achieved using OPTIFLEX 7200/ 8200 guided Radar level meters directly integrated into the storage tanks or via BM26 bypass level gauges which can incorporate a variety of different technologies such as TDR, FMCW, MLI, REED or limit switches, even in redundant configurations.

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