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1. Can I briefly tell you what a sewage flow meter is?
The sewage flow meter is an important instrument used in sewage treatment to measure the flow rate of sewage. It is usually dominated by electromagnetic flow meters. Based on Faradays law of electromagnetic induction, the volumetric flow rate is calculated by sensing the flow rate of the conductive medium inside the pipe.. Its core features and application advantages are as follows: the sensor has a simple structure without additional pressure loss, and there are no movable or throttling components inside the measuring tube. When the fluid passes through, no additional pressure loss is generated, making it one of the flow meters with the lowest operating energy consumption. Adapting to complex media, it can measure dirty, corrosive media, and suspended liquid-solid two-phase flow (such as wastewater containing solid particles). The measuring tube only has an inner lining and electrodes in contact with the fluid, and the material can be selected according to the composition of the wastewater: inner lining materials include polytetrafluoroethylene, perfluoroethylene bridged graphene, chloroprene rubber, polyurethane rubber, etc; Electrode materials: stainless steel, Ha B alloy, Ha C alloy, tantalum, titanium, etc. As a volumetric flow measurement instrument that is not affected by fluid physical properties, the measurement process is not affected by temperature, viscosity, or density changes. After water calibration, it can be directly used for flow measurement of other conductive liquids (with conductivity greater than 5 μ S/cm). The output range is extremely wide and proportional to the average flow rate of the medium, independent of the flow state.
2. How to measure the sewage flow meter for the discharge outlet without a pipe
The sewage flow meter for the discharge outlet without a pipe can be measured by flow velocity measurement method, and the commonly used equipment is Doppler ultrasonic flow meter. Its measurement principle, applicable scenarios, and specific operating points are as follows: Measurement principle Flow velocity measurement method: Calculate the flow rate by measuring the flow velocity of sewage in the pipeline.
. Taking the Doppler ultrasonic flowmeter as an example, its probe emits a beam of ultrasonic waves obliquely upwards. When the ultrasonic waves propagate in the fluid, they will interact with impurities such as bubbles or particles in the fluid. Due to the consistency between impurities and water flow velocity, when ultrasonic waves come into contact with impurities, the reflected wave will produce a Doppler frequency shift Δ f, which is proportional to the flow velocity. By measuring the Doppler frequency shift Δ f, the flow velocity of the fluid can be calculated, and combined with the cross-sectional area of the pipeline, the flo
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