Coriolis Effect Mass Flowmeter - Flow Measurement

Coriolis effect mass flowmeter are capable of directly measuring the mass flow rate of fluids, with minimal influence from medium characteristics such as density, temperature, pressure, and flow distribution. They offer high measurement accuracy, excellent stability, ease of use, low maintenance requirements, and strong communication capabilities, while supporting multi-parameter measurement. These advantages have led to their widespread adoption in process control and other industrial applications.

Working Principle of Coriolis Effect Mass Flowmeter:

A coriolis effect mass flowmeter is an instrument that directly measures the mass flow rate of a fluid based on the Coriolis effect. Its core principle is: when fluid flows through a vibrating tube, the Coriolis force generated by inertia causes a phase shift in the tube. By detecting this phase shift, the mass flow rate can be calculated.

Detailed Workflow:

Vibration Excitation: The flow tube (typically U-shaped or straight) is driven by an electromagnetic system to oscillate periodically. When there is no fluid flow, the vibration phases at the inlet and outlet remain consistent.

Coriolis Force Action: When fluid flows, the inertia of the fluid causes the tube to twist, resulting in a time difference (phase shift) between the vibrations at the inlet and outlet. This difference is proportional to the mass flow rate.

Signal Processing: Sensors detect the phase shift and vibration frequency, and a transmitter converts these signals into parameters such as mass flow rate, density, and temperature. For example, density is calculated based on changes in the natural frequency of the tube, while volumetric flow rate is derived from the mass flow rate and density.

What Are the Advantages of Coriolis Effect Mass Flowmeter?

1.Direct Measurement of Mass Flow

Principle Advantage: Coriolis effect mass flowmeter directly measure the mass flow rate by detecting the Coriolis force generated when fluid flows through a vibrating tube. They do not require compensation for density, temperature, or pressure.

Error Reduction: Compared to traditional volumetric flow meters, they eliminate conversion errors caused by changes in fluid density, temperature, or pressure, resulting in more direct and accurate measurements.

2.High Accuracy and Stability

High Precision: Measurement accuracy can reach ±0.1% to ±0.5%, with some high-precision models achieving up to ±0.05%, meeting the demands of trade settlement and process control.

Excellent Repeatability: Repeatability error can be as low as ±0.01%, with strong long-term stability, making it suitable for high-precision continuous monitoring scenarios.

3.Adaptability to Complex Fluids

Multiphase Flow Measurement: Suitable for slurries containing solid particles, non-Newtonian fluids (e.g., sludge, syrup), and multiphase flow scenarios, with a measurement error ≤±0.5%.

Broad Media Compatibility: Capable of measuring high-viscosity fluids (e.g., crude oil, polymers), high-pressure gases (e.g., CNG, LNG), and media with significant density variations (e.g., syrup, liquefied gases).

4.High-Pressure and High-Viscosity Capability

High-Pressure Operation: Supports pressures up to 700 bar, making it suitable for measuring high-pressure gases and liquids.

High-Viscosity Media: Can measure high-viscosity fluids such as crude oil and polymers, with performance unaffected by fluid viscosity.

5.Multi-Parameter Measurement

Coriolis effect mass flowmeter can not only measure mass flow rate but also simultaneously provide fluid density and temperature data.

6.Strong Resistance to Interference

Measurement results are minimally affected by external factors such as temperature, pressure, fluid state, high temperatures, high pressure, corrosive media, or vibrational environments.

Application Scenarios of Coriolis Effect Mass Flowmeter

Chemical Industry

In chemical production processes, Coriolis effect mass flowmeter are used to measure the flow rates of various raw materials, intermediate products, and finished goods. For example, in plastic manufacturing, they ensure accurate measurement of the mass flow of monomers and additives, guaranteeing that product performance and quality meet specifications. In fertilizer production, these meters enable precise control of the flow rates of raw materials such as ammonia and nitric acid, enhancing both production efficiency and product quality.

Pharmaceutical Industry

Pharmaceutical companies rely on Coriolis mass flowmeters to accurately control the addition of various raw materials and active ingredients during drug synthesis. In pharmaceutical formulation, measuring the flow rates of solvents and excipients is also critical to ensuring drug consistency and stability. For instance, in antibiotic production, precise metering of fermentation raw materials and drug intermediates helps improve drug purity and efficacy.

Oil and Gas Industry

Coriolis mass flow meters play a vital role in petroleum exploration, extraction, refining, and transportation. During crude oil extraction, they measure the mass flow of oil, natural gas, and water produced from wells, providing essential data for reservoir management. In refineries, these meters ensure accurate measurement of the mass flow of various petroleum products, supporting precise process control and maintaining product quality standards.

Food and Beverage Industry

In food and beverage production, Coriolis effect mass flowmeter are employed to measure the flow rates of various raw materials, additives, and finished products. For example, in beverage manufacturing, they enable precise measurement of the mass flow of juices, syrups, and flavorings, ensuring consistent taste and product quality. In food processing, these meters help control the flow of oils, condiments, and other ingredients, enhancing both product quality and production efficiency.