In order to further improve the development of energy saving and consumption reduction work and ensure the operation effectiveness of coal chemical energy metering instruments, in recent years, many metering instruments with relatively high technical content and relatively good energy saving effect have been applied, which are analyzed below. The commonly used flowmeters for energy metering instruments in coal chemical industry include ultrasonic flowmeter, Coriolis mass flowmeter and anti vibration vortex flowmeter.

1、ultrasonic flowmeter

When the traditional orifice flowmeter is applied, if the measured pipe diameter has a larger diameter, the measurement is time-consuming and labor-consuming, and the obtained data results are relatively unstable. In such a measurement process, the application of ultrasonic flowmeter can obtain good results. At the same time, many coal chemical enterprises will replace industrial water with circulating water as the water for heat exchanger. How to measure it or how to install flowmeter in circulating water pipeline is the key problem that is difficult to solve. The experimental results show that the ultrasonic flowmeter has good adaptability for large diameter circulating water flow measurement, no contact, stable and accurate results, and relatively low energy consumption, which has important application significance. Generally speaking, the maximum measurement range of ultrasonic flowmeter can reach five meter diameter pipe. In the process of coal chemical enterprise operation, the measurement of fresh water flow and circulating water flow has always been the difficulty and key point. In the case of industrial water supply, ultrasonic flowmeter can be installed, and its effective application can obtain good measurement accuracy and convenience.

2、Coriolis mass flowmeter

Coriolis force mass flowmeter is also called Coriolis mass flowmeter. It uses the modulation effect of mass flow of fluid on vibration tube and Coriolis force as its operating principle, and then obtains the mass flow of fluid, which includes sensors and transmitters. This method is usually used in small-diameter pipes, and the flow measurement of fluid medium is measured by mass, such as ethylene, liquid carbon dioxide, etc. The composition of Coriolis mass flowmeter does not include rotating parts such as gears and bearings, so the maintenance demand is less, solid particles will not damage the instrument when passing through the instrument pipe, and do not need filtering, so the service life is long. But if Coriolis mass flowmeter is used for conveying measurement all year round, it needs to be identified regularly. At present, some coal chemical workers have confused technical understanding, which leads to some problems in the development of the verification work. Fundamentally speaking, Coriolis mass flowmeter and vortex flowmeter or orifice differential pressure flowmeter have essential differences. It is necessary for technicians to fully understand their output signal and basic principle of operation when applied.

3、Anti vibration vortex flowmeter

Many processes of coal chemical production are accompanied by steam generation, and in the process of equipment operation and maintenance, it can be found that if an area separation detection part is added in the gas pipeline, and the anti vibration vortex flowmeter is used for energy measurement, it can help to carry out the work of energy saving and consumption reduction. In the application process of anti vibration vortex flowmeter, the measurement accuracy is good, and the operation cost is low. In the process of energy saving and consumption reduction, this kind of measuring instrument is widely used. In the process of practical application of anti vibration vortex flowmeter, it has a wider range of applications. Whether it is under the conditions of high pressure, low temperature, or corrosive fluid, it can be used for detection. It is convenient for installation and maintenance, low operation cost, and high accuracy. It has a good application effect and a wide range of applications.