对于流量仪表来讲，耗能的高低取决于流量计的永久压力损失，压损大的耗能大，压损小的耗能小。 For the flow meter, the **V-cone flowmeter's** energy consumption depends on the permanent pressure loss of the flowmeter. Large pressure loss has large energy consumption, and small pressure loss has small energy consumption. Due to the large number of orifice plate instruments used in the metallurgical industry, let's compare the orifice plate with the V-cone pressure loss. Let's take a look at the energy consumption of the two in measuring the flow. Example 1: Saturated steam flow measurement in a plant, inner diameter of pipe 257; working absolute pressure 0.9MPa; working temperature 175.35 ℃; density 4.655kg / m3; maximum flow 30t / h; common flow 20t / h. Orifice plate and V-cone flowmeter take the same β = 0.6. The calculation results are as follows (for the calculation formula and calculation process, see the CD-ROM information): When the common flow rate is 20t / h, the pressure loss of the orifice plate is: 14.162kPaV cone pressure loss: 6.523kPa The orifice plate has a permanent pressure loss greater than the V cone by 7.639 kPa, under the condition of conveying the same flow rate, the perforated plate consumes 11.395kW / h more than the V-cone per hour. If the current average industrial electricity cost is 0.8 yuan / (kW.h), and it is calculated based on 300 days of driving a year, only one set of orifice plate flow meter will pay more electricity cost per year than the V-cone flow meter: 0.8 (yuan) × 11.395 (kW) / h) × 24 (hours) × 300 (days) = 65.63 million yuan Example 2: Blast furnace gas, pipe inner diameter: 702.4mm, working pressure (G): 12kPa, temperature: 70 ° C, local atmospheric pressure: 98.39kPa, working density 1.0326kg / m3, common flow rate 25000m3 / h orifice plate and V cone take the same β = 0.6955. The calculation result is as follows: The pressure loss of the orifice plate under common flow is: 1.894kPaV cone pressure loss is 0.479kPa. The orifice plate is 1.415kPa greater than the permanent pressure loss of the V cone. It consumes more energy per hour under the same flow rate. 12.283kW / h. 每年多支出电费：0.8(元)×12.283(kW/h)×24(小时)×330(天)＝7.783万元通过以上计算可以看出，平时并未引起我们重视的一套小小流量计量，在选用何种类型的仪表上，竟有如此大的潜力(或如此大的浪费没有发现)可以挖掘，可见V锥流量计的节能效果是非常显著的。 According to the industrial electricity cost of 0.8 yuan / (kW.h), calculated for 330 days of driving each year, only one set of orifice plate flowmeters will pay more than the **V-cone flowmeter for** electricity costs: 0.8 (yuan) × 12.283 (kW / h) × 24 (hours) × 330 (days) = 77.83 million yuan. Through the above calculations, it can be seen that a set of small flow meters that do not attract our attention usually have such great potential in what type of instrument to choose ( Or such a huge waste was not found) It can be excavated, and it can be seen that the energy saving effect of the V-cone flowmeter is very significant. In the current insufficient supply of electricity and energy in China, the use of energy-saving flow meters not only creates profits for the enterprise itself, but also meets the national policy of energy conservation and emission reduction 现场安装应用的时候，能够适应大量介质的测量，应用也比较简单，稳定性高，安装也比较简单。 **When V cone flowmeter is** installed and applied in the field, it can adapt to the measurement of a large number of media, the application is relatively simple, the stability is high, and the installation is relatively simple. But for the site, in order to ensure the stability of the site operation, we need to perform normal maintenance.
1: Before installation, measurement verification must be performed. After confirming the compliance with various technical indicators, installation can be strictly performed in accordance with the installation requirements of signal pipelines and differential pressure gauges. For different media, we must refer to relevant standards for different installations and identifications, so as to achieve one-to-one correspondence. 2. When put into use, the air must be removed from the exhaust valve at the highest position of the signal pipeline. 3. The signal pipeline and the differential pressure flowmeter should be cleaned regularly to clear all debris. 4. Before use, check the zero position. When checking the zero position, close the two pilot valves on the instrument valve and open the balance valve. If the zero position is found, the cause should be found and adjusted. 5. If there is a significant difference between the displayed value of the differential pressure flowmeter and the measured value, a comprehensive inspection and adjustment shall be carried out, and the measurement verification shall be carried out again. |