V-cone flowmeter | DQV series V-cone flowmeter, can it measure sewage?

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1. Sharing: Which flowmeter is suitable for measuring biogas? It is recommended to use a V-cone flowmeter for measuring biogas. The specific analysis is as follows: The core advantage of a V-cone flowmeter is that it changes the fluid flow state by placing a conical throttling element at the center of the pipeline, and uses the principle of pressure difference to achieve flow measurement. Its design features make it particularly suitable for biogas measurement scenarios: strong anti impurity ability: biogas, as a mixed gas, often contains impurities such as solid particles and moisture. The conical structure of V-cone flowmeter can reduce impurity deposition and avoid measurement errors caused by blockage of conventional throttling devices. Suitable for viscous fluids: Biogas may contain small amounts of hydrogen sulfide, carbon dioxide, and other components, forming a micro viscous fluid. The streamlined design of V-cone flowmeter can reduce the influence of fluid viscosity on measurement and ensure stable accuracy. Wide measurement range: The flow rate of biogas may fluctuate greatly due to production processes, and the V-cone flow measurement ratio can reach 10:1, which can adapt to flow changes under different working conditions. Low maintenance cost: Its structure is simple, there are no moving parts, and it has high long-term stability. In the later stage, only regular inspections of the differential pressure sensor are needed, making maintenance easy. Image: The V-cone flowmeter generates pressure difference through a conical throttling element, achieving high-precision measurement of biogas characteristics and matching measurement requirements. The main component of biogas is methane (50% -80%), which contains impurities such as carbon dioxide, nitrogen, and a small amount of hydrogen sulfide and moisture, and is flammable and explosive. The following requirements are proposed for this flow meter: Explosion proof performance: It is necessary to choose an intrinsic safety or explosion-proof flow meter with a random range, and the V-cone flow meter can meet the requirements through a matching explosion-proof transmitter. Corrosion resistance: Components such as hydrogen sulfide may corrode metal parts. The main body of the V-cone flowmeter is made of stainless steel or Hastelloy, which can resist corrosion. Low pressure loss: In biogas transportation, pressure drop control is required to reduce energy consumption. The conical structure of the V-cone flowmeter reduces pressure loss when the fluid passes through, which is superior to conventional throttling devices such as orifice plates. Compared with other flow meters, turbine flow meters rely on fluid to drive the turbine to rotate, and impurities in biogas can easily cause turbine jamming, requiring regular calibration and high maintenance costs. Thermal mass flowmeter: calculates flow rate by measuring fluid thermal diffusion coefficient, sensitive to gas composition, and fluctuations in biogas composition may cause errors. Ultrasonic flowmeter: requires pure gas to reduce sound wave attenuation. Particles or moisture in biogas can interfere with the measurement signal, resulting in poor stability. In contrast, V-cone flow meters perform better in terms of resistance to impurities and adaptability to component fluctuations. In a practical application case of a biogas project in a sewage treatment plant, the original orifice flowmeter was frequently shut down for maintenance

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