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Chloride and sulfate analyzers are on-line devices designed for continuous ppb-level monitoring of chloride and sulfate in a water system. METTLER TOLEDO's 3000CS is a combined chloride analyzer and sulfate analyzer that employs microfluidic capillary electrophoresis technology to monitor and promptly catch contamination so corrective action can be taken. This joint chloride analyzer and sulfate analyzer is designed for on-line cycle chemistry measurements and makeup water.
Chloride and sulfate in the power plant water cycle can cause damage and corrosion to expensive equipment. This video explains how the microfluidic capillary electrophoresis (MCE) technology on the chloride and sulfate analyzer helps power plant cycle chemists to maintain ppb-levels of chloride and sulfate within acceptable limits in order to reduce corrosion.
With on-line measurements every 45 minutes, the METTLER TOLEDO chloride and sulfate analyzer catches contamination faster than sampling, through continuous monitoring of your water and steam cycle.
Typically, chloride and sulfate measurements are done with expensive off-line technologies such as ion chromatography and inductively coupled plasma. This is not needed with on-line monitoring.
The 3000CS sulfate and chloride analyzer allows you to reduce lab labor costs, while also eliminating the risks and expense associated with a sample being contaminated in the lab.
METTLER TOLEDO chloride and sulfate analyzers offer an intuitive, user-friendly touchscreen interface for effortless visualization of trend graphs and analysis.
This sulfate and chloride analyzer helps catch contamination early, so that corrective action can be taken to avoid unplanned shutdowns. Its measurement is not influenced by other ions.
The METTLER TOLEDO chloride and sulfate analyzer features a precise 2-point calibration to ensure your analyzer is continuously measuring within specifications.
The chloride analyzer also has Intelligent Sensor Management (ISM) technology to provide you with diagnostics that predict when maintenance or replacement of consumables will be required.
A chloride and sulfate analyzer is an on-line device for automated, ppb-level monitoring of chloride and sulfate in a water stream. The 3000CSchloride and sulfate analyzer is designed for power plant cycle chemistry and makeup water measurements, and uses microfluidic capillary electrophoresis technology.
Microfluidic capillary electrophoresis uses voltage to separate ions in a capillary. Ions move at different speeds in the capillary based on size to charge ratio, leading to separation of the ions. This is the technology that allows the METTLER TOLEDO chloride and sulfate analyzer to provide ppb-level measurements of both chloride and sulfate.
A microfluidic capillary electrophoresis cartridge is used in the chloride and sulfate analyzer to separate the ions in the sample water, providing concentrated clusters of chloride and sulfate ions to travel through the capillary. Concentration of these ions is measured in ppb using a conductivity cell on the cartridge, and is then displayed on the chloride and sulfate analyzer.
Chlorides and sulfates are the most corrosive contaminants in power plant water. They cause corrosion, pitting, stress corrosion cracking, decrease in efficiency with corrosion product deposits, and under-deposit corrosion. These damage expensive plant equipment such as turbines and boilers, leading to unplanned shutdowns for maintenance and repairs. When employing a chloride and sulfate analyzer to monitor these corrosive contaminants, the chloride analyzer can detect early traces of corrosive ions to minimize damage to power plant equipment.
The chloride ion is part of many salts, such as NaCl. Salts are commonly found in nature and are easily soluble in water, causing chloride contamination. METTLER TOLEDO chloride analyzers frequently monitor chloride levels in a water stream to ensure there is no corrosion or damage caused to machinery.
The sulfate ion is part of many salts, such as Na2SO4. Salts are commonly found in nature and are easily soluble in water, causing sulfate contamination. In power plants, sulfate ions can also get into water from breakdown of sulfonated resins. METTLER TOLEDO sulfate analyzers are an on-line device used for automated ppb-level monitoring of sulfate in a water stream to alert users of potential corrosion or damage.
Through proper water treatment, quality of the water introduced into the water/steam cycle can be ensured to have low levels of chlorides and sulfates. If a chloride and sulfate analyzer finds excess chlorides and sulfates in the water/steam cycle, they can be purged using boiler blowdown and fresh makeup water introduced into the cycle.
The most important measurement point in the water/steam cycle for chlorides and sulfates is at the turbine inlet. This ensures that only acceptable levels of chlorides and sulfates enter with the steam into the turbine, the most expensive capital equipment in the power plant. Another important measurement point is after the condensate polisher to monitor for sulfonated resin breakdown. It is also essential to employ a chloride and sulfate analyzer to monitor these ions before the boiler, to ensure the boiler is not damaged. It also provides an opportunity to remove chlorides and sulfates from the water/steam cycle via boiler blowdown if high levels of the ions are detected at the boiler inlet.
Low chloride and sulfate levels are ensured in makeup water by monitoring them after all treatment stages, before the water is sent to the storage tank that feeds the water/steam cycle.
Key regulatory bodies and research organizations such as ERPI (USA), IAPWS (Global) and TPRI (China) specify acceptable limits in their guidelines for power plant operation. Turbine manufacturers also specify acceptable limits in their warranties to ensure optimum performance of the turbine and corrosion control. All METTLER TOLEDO chloride and sulfate analyzers are compliant with these regulatory requirements.
Acceptable limits are 2 or 3 ppb each of chloride and sulfate for makeup water and water/steam cycle.
No, conductivity is a cumulative measurement of all contaminants in water and cannot distinguish between harmful contaminants such as chloride and sulfate and benign components such as carbon dioxide. It does not provide a ppb-level measurement for chlorides and sulfates.
Yes. Chlorides and sulfates should be measured directly at key measurement points in power plants using a chloride and sulfate analyzer. Measurements should be in ppb of each ion, not a cumulative measurement of all contaminants in the water.
Using grab samples to conduct analysis in the lab causes delay in measurements, which could lead to damage to power plant equipment. Such a measurement method also has a risk of contamination while collecting and transporting grab samples, leading to false positives and unnecessary maintenance activities and resulting in increased plant downtime.