For flow meters, the level of energy consumption depends on the pressure loss of the flow meter. Energy consumption with high pressure loss

Large, low pressure loss, and low energy consumption. Due to the widespread use of orifice plate instruments in the metallurgical industry, the orifice plate and V-cone are discussed below

Compare the pressure loss and examine the magnitude of energy consumption during the measurement of flow rate between the two.

Example 1: Measurement of saturated steam flow in a certain factory, with a pipeline inner diameter of 257; Working absolute pressure 0.9MPa; Operating Temperature

175.35℃； Density 4.655kg/m3; High flow rate of 30t/h; The commonly used flow rate is 20t/h.

The orifice plate and V-cone have the same β=0.6.

The calculation results are as follows (refer to the CD material for the calculation formula and process):

When the common flow rate is 20t/h, the pressure loss of the orifice plate is 14.162kPa

The pressure loss of the V-cone is 6.523kPa

The pressure loss of the orifice plate is 7.639kPa greater than that of the V-cone. Under the same flow rate conditions, the orifice plate has a higher pressure loss per hour than the V-cone

The excess energy consumption is 11.395kWh. If based on the current industrial average electricity cost of 0.8 yuan/(kW. h), the annual electricity cost is calculated based on driving

After 300 days of calculation, only one set of orifice flow meters will incur additional electricity costs per year compared to V-cone flow meters

0.8 (yuan) x 11.395 (kW/h) x 24 (hours) x 300 (days)=656300 yuan

Example 2: Blast furnace gas, inner diameter of pipeline: 702.4mm, working pressure (G): 12kPa, temperature: 70 ℃,

Local atmospheric pressure: 98.39kPa, working density of 1.0326kg/m3, commonly used flow rate of 25000m3/h

The orifice plate and V-cone have the same β=0.6955. The calculation results are as follows:

The pressure loss of the orifice plate under common flow rate is 1.894kPa

The pressure loss of the V-cone is 0.479kPa

The pressure loss of the orifice plate is 1.415kPa greater than that of the V-cone, which consumes more energy per hour under the same flow conditions

12.283kW/h。 According to the industrial electricity cost of 0.8 yuan/(kW. h), calculated based on 330 days of driving per year, there is only one set of holes

Plate flow meters will incur additional annual electricity costs compared to V-cone flow meters

0.8 (yuan) × 12.283 (kW/h) × 24 (hours) × 330 (days)=778300 yuan

From the above calculations, it can be seen that a small set of flow meters that we usually do not pay attention to, when selecting

What type of instrument has such great potential (or such great waste that has not been discovered) to explore

The energy-saving effect of V-cone flowmeter is very significant. Currently, there is insufficient supply of electricity and energy in our country

In this case, using energy-saving flow meters not only creates profits for the enterprise itself, but also conforms to the advocated energy-saving reduction

Industrial policies for scheduling.