Description

Flow measurement of blow down water

Требования к данной позиции измерения

  • Insensitive against scaling

Description

Level measurement of hydraulic accumolator

Требования к данной позиции измерения

  • No maintanance
  • High moisture

Description

Temperature measurement after heat exchanger

Требования к данной позиции измерения

  • Process control

Description

Flow measurement of clarified water

Требования к данной позиции измерения

  • Process control

Description

Measurement of filter resistance

Требования к данной позиции измерения

  • No drift
  • Overpressure protection

Description

Level measurement of pure water tank

Требования к данной позиции измерения

  • Process control

Description

Flow measurement of preclarified water

Требования к данной позиции измерения

  • Process control

Description

Temperature measurement of ion exchanger inflow

Требования к данной позиции измерения

  • Process control

Description

Quality measurement after anion exchanger

Требования к данной позиции измерения

  • Installation in pressurized pipe

Description

Quality measurement after anion exchanger 2

Требования к данной позиции измерения

  • Installation in pressurized pipe

Description

Pressure measurement RO raw water

Требования к данной позиции измерения

  • No drift
  • Overpressure protection

Description

Flow measurement of deionate

Требования к данной позиции измерения

  • Low conductivity

Description

Quality measurement deionate

Требования к данной позиции измерения

  • Measurement with measuring cell

Description

Flow measurement of reject

Требования к данной позиции измерения

  • Corosion resistant

Description

Level measuremt of deionate buffer tank

Требования к данной позиции измерения

  • Process control

Description

Flow measurement of deionate feed to polishing

Требования к данной позиции измерения

  • Low conductivity

Description

Measurement of resin resistance

Требования к данной позиции измерения

  • No drift
  • Overpressure protection

Description

Flow measurement of polished feedwater

Требования к данной позиции измерения

  • Low conductivity

Description

Quality measurement deionate

Требования к данной позиции измерения

  • Measurement with measuring cell

Description

Level measurement of demineralized water tank

Требования к данной позиции измерения

  • Moisture
  • Contact free measurement

Description

Flow measurement to feed water system

Требования к данной позиции измерения

  • Low conductivity

Overview

River water in feedwater treatment

Instrumentation in water treatment

High quality boiler feed-water, having low conductivity, dissolved oxygen, silica and other impurity levels is essential for long boiler and turbine life. The water treatment processes are often designed in multiple steps, the choice of process steps varies and depends on the water quality and process concept. Some water with lower quality requirements can be extracted for example for the cooling towers. Pre-treatment by filtration removes mechanical impurities or solid matter. Ion exchanges remove dissolved ions and further softens the feed-water. For the highest boiler feed-water quality there are further treatment steps - for example using reverse osmosis or EDI. As a final step mixed bed ion exchangers are used for polishing. Removal of dissolved ions like Na, K, Cl, Ca, Mg causes the conductivity to get lower.

Flows can be economically measured within the first treatment steps (up to temperatures of 180 °C) using OPTIFLUX electromagnetic flowmeters. At low conductivities OPTIBAR DP flowmeters or OPTISONC 3400 ultrasonic flowmeters should be used. The OPTIBAR DP 7060 C is ideal for measuring differential pressure across filters, strainers, heat exchangers and ion exchangers. SMARTPAD or OPTISENS are the relevant liquid analysers available.

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