First, the flow meter of industrial production process is one of the large-scale meters in process automation instruments and devices. It is widely used in metallurgy, electricity, coal, chemical industry, petroleum, transportation, construction, light textile, food, medicine, agriculture, Environmental protection and people's daily life, in various fields of the national economy, are important tools for developing industrial and agricultural production, saving energy, improving product quality, and improving economic efficiency and management. Among the process automation instruments and devices, the flow meter has two major functions: as a detection instrument for the process automation control system and a total meter for measuring the quantity of materials.
Second, energy measurement energy is divided into primary energy (coal, crude oil, coal bed gas, petroleum gas and natural gas), secondary energy (electricity, coke, artificial gas, refined oil, liquefied petroleum gas, steam) and energy-bearing working fluid (compression Air, oxygen, nitrogen, hydrogen, water), etc. Energy measurement is an important means of scientifically managing energy, realizing energy saving and consumption reduction, and improving economic benefits. Flow meters are an important part of energy measurement instruments. Water, artificial gas, natural gas, steam, and oil products use an extremely large number of flow meters. They are indispensable tools for energy management and economic accounting.
Third, the discharge of smoke, waste liquid, and sewage from environmental protection projects seriously pollutes the atmosphere and water resources and seriously threatens the human living environment. The state has listed sustainable development as a national policy, and environmental protection will be the biggest issue in the 21st century. To control air and water pollution, management must be strengthened, and management is based on quantitative control of pollution.
China is a country with coal as its main energy source. There are millions of chimneys in the country that continuously emit smoke to the atmosphere. Flue gas emission control is an important project to eliminate pollution. Each chimney must be equipped with flue gas analysis instruments and flow meters to form a flail emission monitoring system. The flow rate and volume of the flue gas are very difficult. The difficulty is that the chimney is large in size and irregular in shape, the gas composition varies, the flow rate range is large, dirt, dust, corrosion, high temperature, no straight pipe sections, etc.
Fourth, there are five modes of transportation: railway, air, water, and pipeline transportation. Although pipeline transportation has already existed for a long time, its application is not universal. With the prominence of environmental protection issues, the characteristics of pipeline transportation have attracted people's attention. The appearance of the pipeline must be equipped with a flow meter. It is the eye of control, distribution and dispatch, and an essential tool for safety oversight and economic accounting.
The 21st century will usher in the century of life sciences, and industries featuring biotechnology will develop rapidly. There are many substances to be monitored and measured in biotechnology, such as blood and urine. Instrument development is extremely difficult, with a wide variety.
Sixth, scientific experiments The flowmeters required for scientific experiments are not only numerous, but also extremely diverse. According to statistics, a large part of more than 100 types of flowmeters are used for scientific research. They are not mass-produced and sold on the market. Many scientific research institutions and large enterprises have special teams to develop special flowmeters.
Seven, marine weather, rivers and lakes
These areas are open channels, and generally need to detect the flow velocity and then estimate the flow. The physical principle and fluid mechanics basis of the flowmeter and flowmeter are common, but the principle and structure of the instrument and the conditions of use are very different.