In the core production processes of coal chemical engineering, precise measurement of water-coal slurry remains a technical challenge for enterprises. High-performance electromagnetic flowmeters, with their wear-resistant, corrosion-resistant, and high-precision measurement capabilities, have become crucial in ensuring safe, stable, long-term, full-capacity, and optimal operation of water-coal slurry gasification units. Yigeqi's high-performance electromagnetic flowmeters have been successfully implemented and widely adopted, effectively addressing these challenges for clients.
Coal-water slurry, a clean coal-based fluid composed of pulverized coal, water, and additives, serves as a crucial feedstock in modern coal chemical processes. However, its high hardness, wear resistance issues, sedimentation tendency, and corrosiveness pose significant challenges to flow measurement instruments. Traditional vortex, turbine, and some ultrasonic flow meters exhibit multiple operational issues: wear-prone impellers and bearings causing measurement inaccuracies or instrument damage; frequent shutdowns for cleaning due to clogged channels disrupting production; and unstable readings with poor reliability that fail to provide stable signals for DCS control systems—resulting in both material waste and safety hazards.
The electromagnetic flowmeter operates based on Faraday's Law of Electromagnetic Induction, demonstrating exceptional performance in water-coal slurry measurement through its innovative design:
1. Robust Structure: Specifically engineered for water-coal slurry's abrasive wear characteristics, this specialized instrument features wear-resistant linings (such as high-purity alumina ceramic or polyurethane) and carbide electrodes. The ceramic lining's high Mohs hardness resists coal powder erosion, ensuring service life far exceeding conventional instruments.
2. Smooth Flow Path: The measurement tube contains no movable or obstructive components, providing a smooth straight-through flow channel that reduces pressure loss, saves energy consumption during transportation, minimizes blockage risks, and guarantees continuous production.
3. Precision Measurement: The measurement results depend solely on the fluid's average velocity, unaffected by variations in fluid density, viscosity, temperature, or pressure. Even with fluctuations in water-coal slurry concentration, it delivers stable and accurate flow signals with precision reaching ±0.5% or higher, providing reliable data foundations for precise coal blending operations.
As the coal chemical industry advances toward precision and low-carbon development, there is growing demand for enhanced measurement accuracy. High-performance electromagnetic flowmeters effectively address challenges in measuring slurries with high wear resistance and blockage risks, demonstrating broad application potential. These technologies will provide crucial technical support to safeguard national energy security and drive the high-quality development of the coal chemical sector.
