The anti-corrosion electromagnetic flow meter is a flow measuring instrument designed with new technology, which is especially suitable for measuring corrosive liquids or liquids with corrosive components. The following is a detailed disclosure of the anti-corrosion electromagnetic flowmeter:
Working principle
The anticorrosive electromagnetic flowmeter works based on Faraday’s law of electromagnetic induction. When a conducting fluid passes through a magnetic field perpendicular to the direction of flow, the fluid induces a voltage in a plane perpendicular to both the magnetic field and the direction of flow. This induced voltage is proportional to the flow rate of the fluid, so the flow rate can be determined by measuring this voltage, and the flow rate can be calculated.
Structural composition
The anti-corrosion electromagnetic flowmeter is usually composed of two parts: sensor and converter. The sensor part includes a measuring catheter, a measuring electrode, an exciting coil, an iron core, a magnetic yoke, a housing and other components. The measuring tube is equipped with a lining and an electrode, and the choice of the lining material depends on the corrosiveness of the measured medium. The converter part is responsible for amplifying, transforming, filtering and a series of digital processing of the induced voltage signal detected by the sensor, and finally displaying the instantaneous flow and cumulative flow.
Characteristics and advantages
- Corrosion resistance: The anticorrosive electromagnetic flowmeter is made of corrosion-resistant materials, such as titanium, Hastelloy, tatarin and other special alloys or ceramic materials, which can resist the erosion of corrosive liquids on the instrument and extend the service life of the instrument.
- High stability and accuracy: The flowmeter adopts constant current low-frequency three-value rectangular wave or dual-frequency rectangular wave excitation, eliminating the error caused by power supply voltage fluctuation, power supply frequency change and excitation coil impedance change, with high stability and accuracy.
- Intelligent electromagnetic flowmeters usually have a variety of communication interfaces and protocols, such as RS-485, RS-232, HART and MODBUS, etc., allowing integration with other control systems or monitoring systems to achieve real-time data transmission and remote monitoring.
- High temperature and high pressure applications: Some anti-corrosion electromagnetic flowmeters are designed for high temperature and high pressure applications to provide reliable flow measurement under extreme process conditions.
- Low maintenance costs: Due to their corrosion resistance and durability, anti-corrosion electromagnetic flowmeters generally require less maintenance, reducing maintenance costs and downtime.
- Programmable and flexible: Smart electromagnetic flowmeters are often programmable and can be adjusted and configured as needed to suit different flow measurement needs.
- Data logging and analysis: Some models have data logging and analysis capabilities that store historical data and generate reports to help monitor processes and performance.
Scope of application
The anti-corrosion electromagnetic flowmeter is widely used in petroleum, chemical industry, metallurgy, textile, food, pharmaceutical, papermaking and other industries, as well as environmental protection, municipal management, water conservancy construction and other fields. It can measure the volume flow of various corrosive acids, alkalis, salt solutions and mud, pulp, paper pulp and other liquid-solid two-phase suspension liquids.
Installation and maintenance
When installing the anti-corrosion electromagnetic flow meter, the following points need to be noted:
- Avoid installation in places where the temperature changes greatly or where the equipment is exposed to high temperature radiation. If necessary, take measures for heat insulation and ventilation.
- It should be installed indoors. If it is installed outdoors, it should be protected from rain, water and sun exposure. It should be protected from moisture and sun protection.
- Avoid installation in an environment containing corrosive gases. If necessary, ventilation measures should be taken.
- There should be sufficient installation space around the flow meter for installation and maintenance.
- Avoid installation in places with strong magnetic fields and strong vibration sources, such as large pipeline vibration, there should be fixed pipe supports on both sides of the flow meter.
- In terms of maintenance, the lining and electrodes of the sensor should be checked regularly for wear or corrosion, and the electrical connection of the converter is good. If necessary, replace worn or corroded parts in a timely manner and clean dirt and sediment from sensors and converters.
In summary, the anti-corrosion electromagnetic flowmeter has been widely used in various fields due to its corrosion resistance, high stability and accuracy, a variety of communication protocols, as well as programmability and flexibility. At the same time, some matters need to be paid attention to in installation and maintenance to ensure its normal operation and extend its service life.