Many different industries use slurry applications as part of their processes. In most instances, that means a pumped, pulped or mined material is mixed with water before it is moved along through a pipe to the next step in the process, which can involve adding chemicals or solvents for the next stage of the product. Knowing which additive to add — and when — are important parts of the process, as well as knowing how much is flowing through the pipes at any given time. This flow information will determine the amount of additive required. An inaccurate measurement means extra expenses, wasted additive, wasted product and possible process upsets.
It is not easy to get a correct measurement without the right specialized equipment because the very nature of slurry means there will be large chunks of debris that are part of the flow, which can cause noise interference and skew the measurement data.
Advantage and challenge
Generally, the meter of choice for these kinds of applications is the magnetic flowmeter — or mag meter — and specifically, a slurry mag meter. A mag meter is obstruction-less and has no moving parts that can be damaged by the particles and chunks that flow through the pipes. Because slurry is a water suspension, it is easier to measure with a magnetic flowmeter, which operates on Faraday’s law of electromagnetism. The less pure the water is, the more conductive it becomes, making it possible to gain accurate readings of the flow of materials. However, most traditional mag meters are subject to high noise interference from the material flowing through the pipe impinging on the electrodes, which can interfere with signal processing.
The Solution to Noise Interference in Slurry Flow MeasurementsTo have the capability for an accurate, stable flow measurement, you need a transmitter with advanced signal processing. Advanced signal processing is used in the new Slurry Magnetic Flow Meter to enhance its capacity to consistently and accurately separate the flow signal from the slurry noise without the need for lag from excessive analog damping. Additionally, Smart Meter Verification continuously monitors the health of the flow meter, eliminating uncertainty and confirming compliance.