Mass flow meter to measure oil content

According to the liquid phase flow range of 0-16m3/h on site, the mass flowmeter of DN25 should be selected, but the research shows that the mass flowmeter under the same flow rate, the density measurement effect of DN50 is good under the condition of full pipe. According to the analysis of error influencing factors, the measurement accuracy of liquid phase mixing density is given priority, and the accuracy of liquid phase total flow rate is relatively easy to meet the measurement requirements. Therefore, a mass flow meter with a caliber of DN50 is finally selected as the main equipment for oil content measurement. The accuracy of liquid phase density measurement under the caliber can reach 0.002g/cm3. Design the oil content test experiment with the oil content range from 0 to, and verify the oil content measurement effect of the mass flowmeter through the experiment. The oil and water phases of the experimental device enter the device from the inlet of the separator after being mixed, and the outlet is divided into two parts: the gas phase outlet and the liquid phase outlet. For the frequency signal of the mixed density and flow rate of the measured liquid, the zero point operation of the mass flowmeter should be adjusted before use to ensure accurate measurement. The oil-in-water (O/W) experiment was carried out first, and the relationship between the oil content measured in the experiment and the oil content given in the standard table is shown in Figure 2. Figure 2 The relationship between the measured oil content and the measured oil content 1 Then conduct the water-in-oil (W/O) experiment, the relationship between the measured oil content and the oil content given in the standard table is shown in Figure 3. Figure 3 The relationship between the measured oil content and the measured oil content 2 From the above results, it can be seen that whether it is water-in-oil or oil-in-water, the oil content measured by the mass flowmeter is basically close to the oil content given in the standard table. Therefore, use The mass flow meter measures the average density of the liquid phase to calculate the oil content, which can be further analyzed and studied. Next, the relative error of oil content measurement is analyzed, as shown in Figure 4. It can be seen from the results in Figure 4 that with the increase of the oil content, the relative error of the oil content measured by the mass flow meter decreases gradually. The actual situation is that the density measurement error of the mass flowmeter is constant, and the error of the measured value of the oil content rate does not change much. When the oil content is lower, the relative error will be larger, so it presents a trend as shown in Figure 4. Fig. 4 Relative error analysis chart of oil content measurement

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