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Clamp-on ultrasonic flow measurement is an advanced, non-intrusive method of monitoring fluid flow and concentration in industrial processes. By using ultrasonic transducers attached to the exterior of a pipe, this technology measures the transit time difference of ultrasonic signals to determine flow rates. It also allows for the real-time calculation of fluid concentration based on sound speed, which varies with temperature and substance composition. This innovative solution is particularly beneficial for chemical plants dealing with corrosive substances like sodium hydroxide (NaOH).

The importance of accurate sodium hydroxide measurement:

In a Kuwait-based chlor-alkali plant, which has been operational for over 50 years, the accurate measurement of sodium hydroxide concentration is vital. This facility plays a key role in supplying chlorine, hydrogen, and sodium hydroxide (NaOH) for desalination plants and power stations, making it essential for Kuwait’s industrial infrastructure. The sodium hydroxide is typically transported via pipelines as 32% caustic soda, but the production process requires a 20% NaOH concentration, achieved through dilution with demineralised water.

Monitoring the concentration of NaOH is crucial for maintaining production efficiency. Traditionally, conductivity sensors have been used to measure concentration, but these sensors can wear out quickly due to the highly corrosive nature of NaOH. This results in frequent maintenance, increased safety risks, and inconsistencies between laboratory and online measurements.

How clamp-on flow measurement improves safety and efficiency:

To overcome the limitations of conductivity sensors, ultrasonic technology has emerged as a safer and more reliable method. The clamp-on ultrasonic system measures not only flow rates but also the sound speed of the fluid, which correlates directly with the NaOH concentration. This method allows for continuous, real-time monitoring without the need for intrusive sensors, improving safety by minimising direct contact with the corrosive solution.

Maintenance-free solution:

By implementing clamp-on ultrasonic technology for concentration measurement, the plant has reduced maintenance needs and enhanced operational safety. The virtually maintenance-free system ensures accurate, reliable data, enabling operators to optimise processes and improve production efficiency. With precise real-time monitoring, chemical plants can achieve cost-effective workflows while maintaining stringent safety standards. This advanced solution is a key innovation in the chlor-alkali industry, supporting sustainable and efficient production practices.

To find out more about the capabilities of clamp-on ultrasonic flow measurement in the chemical industry, or to discuss short or long-term portable flowmeter rental options, contact Simon Millington – www.emerson.com | flexim-uk@emerson.com | +44 (0)1606 781 420

External URL: www.emerson.com