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Specific Conductivity Analyser – Monitor AMI Powercon
This analyser allows continuous monitoring of the specific or total conductivity. It is a complete system with transmitter, a high precision conductivity sensor and a flow cell with a needle valve and digital sample flow meter. Every meter is factory tested, calibrated and ready for use. The AMI Powercon comes with two signal outputs for measured values, two relays as limit switches or as controllers, alarm relays and an input for potential free contact. Measuring range is 0.055 to 1000µS/cm, temperature up to 50°C and inlet pressure of 2 bar. The outlet is to atmosphere. Sample inlet is swagger lock ¼ inch
Cationic Conductivity Analyser – Monitor AMI Powercon acid
This analyser allows continuous monitoring of the cationic conductivity. It is a complete system with transmitter, a high precision conductivity sensor and a flow cell with a needle valve and digital sample flow meter. For measurement of cationic conductivity a nuclear grade cation column is included complete with desecration. Every meter is factory tested, calibrated and ready for use.
The AMI Powercon comes with two signal outputs for measured values, two relays as limit switches or as controllers, alarm relays and an input for potential free contact. Measuring range is 0.055 to 1000µS/cm, temperature up to 50°C and inlet pressure of 2 bar. The outlet is to atmosphere. Sample inlet is swagger lock ¼ inch.
Trace Dissolved Oxygen Analyser – Monitor AMI Oxytrace QED
Oxygen in boiler water promotes corrosion. The levels is often not zero but maintained at trace levels to promote the formation of magnetite, the corrosion protective layer inside boilers. As such the accuracy and precision of trace oxygen levels is very important. Swan AMI Oxytrace has been designed to measure trace oxygen levels in high pressure and nuclear power boilers. Swan Indonesia supplies the Monitor AMI Oxytrace QED analyser to ensure proper control of your oxygen levels in the boiler. This high precision instrument has a three electrode Oxytrace G sensor for the continuous measurement of trace levels of dissolved oxygen in boiler water. To maintain the high accuracy the analyser is equipped with a Faraday electrode to verify measurements at ppb levels.
The range is 0-20 ppm with automatic air pressure and temperature compensation. This analyser is equipped with a flow cell made of acrylic glass with needle valve, faraday electrode and digital sample flow meter. The complete system is mounted on stainless steel panel. The Swan AMI Oxytrace comes with two signal outputs for measured values, two relays as limit switches or as controllers, alarm relays and an input for potential free contact. The temperature of the sample is up to 50°C and inlet pressure of 2 bar. The outlet is to atmosphere. Sample inlet is swagger lock ¼ inch. The analyser is factory tested and ready for use.
Phosphate Analyser – AMI phosphate II
Phosphate is sometimes added into the boiler to control corrosion. Controlling the level of phosphate is important for proper operation. Swan Indonesia supplies the AMI phosphate II for use in high and low pressure boilers. This analyser is a colorimetric analyser based on the ISO 6878 method for phosphate measurement. The measuring range is from 0.01 to 10 ppm. This instrument comes complete with measurement and control electronics, photometer, flow indicator, reaction chamber, reagent dosing system and reagent containers. The instrument is factory tested and calibrated. It has a optional dual channel stream or AMI sample sequencer up to 6 sample streams. Communication interface are RS 232, profibus, Modbus or USB.
Sodium Analyser AMI sodium P or AMI Soditrace.
Sodium is monitored in boiler water to check for ingress of sea water and to ensure that the steam does not transfer sodium chloride to the turbine where it will cause stress corrosion cracking. Swan sodium analyser AMI sodium P analyser is used for boiler whose pH is greater than 7. For waters with other pH ask the friendly Arasains Indonesia sales staff. The alkalization reagent used is isopropyl amine. Calibration is easy with a two point calibration. Grab samples can also be made using the analyser. The range for sodium P analyser is 0.1-10000 ppb. The response time is 150 secs and accuracy is ±5% of reading. Sample water is from 0 to 45°C and ammonia concentration is ≤10ppm.
FREQUENTLY ASKED QUESTIONS
What level of conductivity should be maintained in a high pressure boiler?
Ultra pure water has a conductivity of 0.055µS/cm. However this is difficult to maintain in a boiler due to dissolution of iron in water, leakages in condenser and other reasons. The purer the water the less is the release rate of iron into the boiler water. For an oxygenated water system of 200ppb of oxygen, the release rate of iron at 100°C with a conductivity of 0.15µS/cm is 2.23 g/m2d whilst at a conductivity of 0.93µS/cm it is 6.9g/m2d
Why is conductivity the most important parameter measured in boiler water?
Contamination of boiler water is usually by salts eg sodium and magnesium. Calcium and magnesium salts is the cause of hardness in water and can cause scaling in boiler. These salts are removed by ion exchange columns but they can be exhausted and needs regeneration. Conductivity measurement can be used to tell when this is necessary. Salts also seeps into the boiler water through leaks in the condensers. Conductivity is the easiest and cheapest measurements to carry this out.
How does degassed conductivity save money for power plants?
Startup of boilers after shutdown is dependent of conductivity measurements. During shut down the conductivity usually goes up due to co2 absorption and release of iron, seepage of salts, non-stable operation of resin plants etc. As such the turbine is off loaded to ensure the turbine does not accumulate salts from the boiler. The salt content rapidly decreases but is effect of co2 lasts. Degassed conductivity removes the conductivity due to co2 and allows the boiler to start up much faster. Faster start up can pay for the degassed conductivity in a short time.
For more information on the above tests contact the friendly Arasains sales staff or fill in the enquiry form.
For more questions ask Dr Lee
Caution : not all question can or will be answered