Accurate Coriolis Force Mass Flowmeter For Paper Making And Textile Industry

The Coriolis Mass Flowmeter is a precision instrument that directly measures the mass flow of fluids. It works based on the principle of Coriolis force. It is known for its high accuracy and strong adaptability to various environmental conditions such as medium type, temperature, pressure, etc. It is widely used in fluid measurement in various industries, such as petrochemical, food and medicine, natural gas and other fields.

Working Principle
The working principle of the Coriolis Mass Flowmeter is based on the Coriolis effect. The Coriolis effect refers to the fact that when a fluid passes through a vibrating pipe, the movement of the fluid will generate a torsional force in the pipe that is proportional to the flow rate, namely the Coriolis force. The flowmeter calculates the mass flow rate of the fluid passing through the pipe by measuring the magnitude of this torsional force.

Detailed steps:
Vibrating pipe: The core component of the Coriolis flowmeter is one or more vibrating pipes. When the fluid flows through these vibrating pipes, the pipes vibrate at a specific frequency.
Coriolis effect: When the fluid passes through a vibrating pipe, a Coriolis force is generated between the flow of the fluid and the vibration direction. This force causes a slight torsion or phase difference in the vibrating pipe.
Detecting Phase Difference: The flowmeter’s sensor measures the twist or phase difference of the vibrating tube, which is proportional to the mass flow of the fluid.
Calculating Mass Flow: By analyzing the phase difference, the flowmeter can accurately calculate the mass flow of the fluid flowing through the pipe.
Density Measurement: Coriolis flowmeters can also measure mass flow and density simultaneously by measuring the resonant frequency of the vibrating pipe to infer the density of the fluid.
Temperature Compensation: Most Coriolis flowmeters have a temperature sensor to compensate for the effects of temperature on flow and density measurements.

The selection of Coriolis Mass Flowmeter needs to be comprehensively considered according to the needs of the specific application environment, mainly including the following aspects:

1. Measuring medium
- **Medium type**: The measured fluid can be liquid, gas or mixture. Different media have different requirements for the sensor material and design of the flowmeter.
- **Medium characteristics**: Including the viscosity, density, temperature, pressure and other characteristics of the medium. These parameters directly affect the accuracy and stability of the flowmeter.

2. Flow range
- According to the actual working conditions, determine the minimum, maximum and normal working flow range. The flowmeter range should cover all flow ranges under the working conditions, and try to make the normal operating flow within the optimal working range of the flowmeter.

3. Pipe size
- Select the appropriate flowmeter model according to the pipe diameter of the measured fluid. Usually, Coriolis mass flowmeters can measure fluids from very small pipe diameters to larger pipe diameters.

4. Accuracy requirements
- Different industries and applications have different accuracy requirements. Coriolis mass flowmeters generally have high measurement accuracy (usually up to ±0.1% to ±0.2%). If the application scenario has high requirements for accuracy, choose a high-precision model.

5. Medium temperature and pressure
- The sensor and transmitter materials of the Coriolis flowmeter need to be able to withstand the temperature and pressure of the working medium. Common high-temperature and high-pressure models are available.

6. Material requirements
- According to the corrosiveness or special requirements of the medium, select a suitable sensor material. Common materials include stainless steel, Hastelloy, titanium, etc., which are suitable for different corrosiveness and environments.

7. Installation environment
- The installation environment of the flowmeter is also an important consideration for selection, such as whether there is vibration, whether explosion-proof is required, protection level requirements, etc.

8. Output signal
- Confirm whether the output signal of the flowmeter meets the requirements of the control system. Common outputs include 4-20mA, voltage signal, pulse signal, HART, Modbus, etc.

9. Price and brand
- There are many brands of Coriolis mass flowmeters on the market, such as Emerson, KROHNE, Endress+Hauser, etc. When choosing, you need to combine the budget and the brand's technical support, after-sales service and other factors.

10. Other special requirements
- If there are other special process requirements, such as explosion-proof certification (such as ATEX, IECEx), hygiene standard certification (such as FDA, 3A standard), you need to consider them when selecting.

Summary
The selection of Coriolis mass flowmeter should be comprehensively analyzed based on multiple factors such as the measurement medium, flow range, accuracy requirements, installation environment, etc. to ensure that the selected model is suitable for the specific application scenario. It is recommended to communicate with suppliers or technical experts during the selection process to ensure that the most suitable product is selected.

Detailed introduction of Coriolis mass flowmeter:

The Coriolis Mass Flow Meter is a meter used to measure the mass flow of liquid or gas, and its working principle is based on the Coriolis effect. Coriolis flowmeters are widely used due to their high accuracy and wide range of applications. The following is a detailed introduction to the Coriolis mass flowmeter:

Working Principle

The working principle of the Coriolis mass flowmeter is based on the Coriolis Effect, which refers to the inertial force that an object will be subject to when it moves in a rotating system. Specifically, the Coriolis flowmeter uses the following steps to measure flow:

1. **Fluid passing through the sensor**: The fluid flows in the sensor of the flowmeter, usually through a pair of vibrating tubes or vibrating elements.

2. **Vibration of the vibrating tube**: The vibrating tubes of the flowmeter are forced to vibrate at a certain frequency and amplitude. The fluid exerts force on these vibrating tubes during the flow process.

3. **Generation of Coriolis force**: When the fluid flows through the vibrating tube, Coriolis force is generated due to the inertia of the fluid, and this force causes the vibrating tube to have a relative displacement. This displacement affects the vibration frequency and phase of the vibrating tube.

4. **Measurement and calculation**: The sensor detects the relative displacement and frequency change of the vibrating tube and converts these signals into mass flow values. By analyzing the vibration characteristics of the vibrating tube, the flow meter can directly calculate the mass flow of the fluid without considering the density and temperature changes of the fluid.

Main features

- **High accuracy**: Coriolis flowmeters provide very high measurement accuracy, which can reach 0.1% or even higher.

- **Direct measurement of mass flow**: The mass flow of the fluid can be measured directly without converting the relationship between volume flow and density.

- **Wide applicability**: Suitable for flow measurement of liquids and gases, including fluids with high viscosity, corrosiveness or high bubble content.

- **Comprehensive functions**: In addition to flow measurement, many Coriolis flowmeters can also measure other parameters such as temperature, density and concentration.

- **Less maintenance requirements**: Because the measuring part of the flowmeter has no moving mechanical parts, it is relatively less prone to wear and failure.

Application areas

- **Chemical industry**: Used to accurately measure the flow of chemicals, especially those that are highly corrosive or viscous.
- **Food and Beverage Industry**: Accurately measure liquid raw materials and products to ensure product consistency and quality.
- **Oil and Gas**: Measure the flow of oil, natural gas and their mixtures, especially in situations where high accuracy and stability are required.
- **Pharmaceutical Industry**: Used to accurately measure the flow of drugs and other critical liquids during the production process.

Overall, Coriolis mass flowmeters have become key flow measurement tools in many industrial fields due to their high accuracy, stability and versatility.

Main Features
1. Unchallengeable performance on liquid mass flow, volume flow, and density measurement
2. Unique design delivers unparalleled measurement sensitivity and stability
3. Guarantees consistent, reliable performance over the widest flow range
4. Designed to minimize process, mounting, and environmental effect

Working Principle
If a pipe is rotated around a point (P) while liquid is flowing through it (toward or away from the center of rotation), that fluid will generate an inertial force, with reference to Figure 1.1:

Sensor Structure

Mass flow meter sensor consists of measurement tube, driving device, position detector, support structure, the temperature sensor, housing, etc.
① Supporting structure: the measuring tube fixed on the supporting structure as the vibrating axis.
② The measuring tube (Vibrating tube): consist of two parallel tubes.
③ Position detector: used for the measurement of measuring tube distortion.
④ Drive device: generate electromagnetic force to drive measuring tube to make it vibrate close to resonance frequency.
⑤ Housing: Protect the measuring tube, driving unit and detector.

Technical Parameters

Suzhou Beite Smart Instrument Co., Ltd. was established in 2007.It is an automated instrument manufacturer integrating R&D, design, manufacturing, sales and system complete services.

After years of development, the company's new factory covers an area of ​​15 acres, with a workshop area of ​​4000m2. It has complete production and processing equipment. The electronics workshop has a modern SMT assembly line and a complete electronic design laboratory. The machinery workshop has multiple precision CNC lathes, ordinary lathes, CNC milling machines, fully automatic circumferential seam welding machines, drilling machines and other equipment. The calibration workshop has two liquid calibration test lines and one small and medium flow gas calibration test line. Each product has been actually calibrated and verified to ensure product quality.

The company has strict quality control in every aspect from product design, raw material procurement and processing, manufacturing and assembly, testing and inspection to product delivery, striving for zero defect products, and using scientific management, strict technology, sophisticated equipment, to ensure product quality. quality. The company's products, from hardware to software, all have the company's independent intellectual property rights.

The company's products are widely used in municipal administration, petroleum, chemical industry, metallurgy, pharmaceuticals, thermoelectric papermaking, food environmental protection and scientific research fields, and are exported to Southeast Asia, South America, Europe and other countries. Beite's integrity, strength and product quality have been recognized by the industry.

The company's main products include metal tube float (rotor) flowmeters, glass rotor flowmeters, plastic tube flowmeters, turbine flowmeters, thermal gas mass flowmeters, gas turbine flowmeters, intelligent electromagnetic flowmeters, vortex flowmeters, pipeline ultrasonic flowmeters, magnetic flap level meters, ultrasonic level meters, intelligent radar level meters, pressure transmitters, flow totalizers, batch control systems, etc. There are more than a dozen series and hundreds of varieties.