Como funciona o medidor de fluxo de chorume Doppler

To achieve the best performance from an ultrasonic Doppler flow meter, it is crucial to place the Doppler sensors strategically. They should be installed at locations along the pipe free from turbulence-inducing elements such as bends, tees, valves, and booster pumps. This placement helps in obtaining a more precise signal and more accurate flow measurement. Typically, the accuracy of Doppler flow meters is about 2% of the full scale, which is sufficient for most industrial applications, including complex dredging operations where precise flow measurement is critical for optimizing the dredging process and enhancing operational efficiency.

The Doppler flow technique only works on difficult-to-pump liquids that contain solids or bubbles to reflect its signal. Slurries, sludge, wastewater, abrasive sand and rocks, and viscous and corrosive chemicals are considered “difficult” liquids that may damage regular internal flow meters. Because the Doppler sensor of ultrasonic flow meters is mounted on the outside of the pipe, there is no risk of pressure drop, damage to sensors, or obstruction to the flow within the pipeline. This ensures accurate readings to maintain your critical line velocity.

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Tela de dados do Flowmeter mostrando as taxas de fluxo em tempo real. Esta unidade também pode ser conectada sem fio ao medidor de fluxo para passar dados para vários locais simultaneamente. Modelo mais antigo mostrado.

The Importance of Maintaining Critical Flow Velocity

Critical line velocity is the speed at which a fluid or material must move through a set pipeline length to prevent solids from settling inside the pipeline. Over time, this can lead to clogs and other operational and maintenance problems. Therefore, it is of utmost importance to know the critical line velocity of the material to be pumped, as it can vary depending on the material.

Pipe friction loss occurs when a fluid or slurry moves from point A to point B through a pipeline. As the fluid comes into contact with the pipeline’s walls, friction occurs, which can slow down the flow of the material as it moves through the pipeline. As you can imagine, the more friction inflicted upon the fluid, the more power is needed to move it through the pipeline effectively. Maintaining the correct flow rate will prevent sedimentation buildup, which could lead to pipeline clogging or other costly maintenance issues. Therefore, it is critical to maintain enough critical line velocity to keep the material in suspension and prevent significant problems down the road.

When designing a pipeline for a particular type of slurry, it is essential to predict the friction loss and give the pump enough power at the beginning of the pipe to ensure the required flow rate will be achieved at the discharge end of the pipeline. The internal roughness of the pipeline can also affect friction loss, as the rougher the pipeline is, the more friction the slurry will generate, contributing to slurry pipe friction loss. This must be considered to measure the velocity needed for your pipeline before starting a project.

An ultrasonic flow meter sends data wirelessly in real-time to a display mounted in the cab of an excavator using an Excavator Dredge Pump Attachment. This gives the dredge operator everything they need to ensure correct flow and production rates.

Medidor de fluxo móvel sem fio

This version is used for remote job sites and shoots accurate Doppler flow readings to the control unit in the excavator OR control center. Measure and achieve optimal production rates on the fly while quickly moving from one location to the other. This advanced version of the ultrasonic flow meter is designed specifically for remote job sites, providing a highly accurate measurement of flow rates.

Utilizing ultrasonic technology, it sends precise Doppler flow readings directly to a control unit, whether it’s located in an excavator or a central control center. This feature allows operators to monitor and adjust production rates in real time, ensuring optimal performance and efficiency. The mobility of the ultrasonic flow meter is a significant advantage, as it can be easily transported and set up at various locations, making it ideal for projects that require frequent site changes.

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