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 day and night. Flue gas emission control has become an important project to eradicate pollution. Due to the rapid increase in population and the rapid development of industrial production, the environment has been seriously deteriorated, and it has reached a dangerous level. The state regards sustainable development as a national policy, and it will be the biggest issue in the 21st century. The management of air pollution and water pollution must be strengthened, and the basis of management is the quantitative control of pollution. In the United States, legislation has been established for smoke emission standards. Each chimney must be equipped with a flue gas analyzer and an electromagnetic sewage flow meter to form a continuous emission monitoring system (CEMS). Smoke exhaust gas flow measurement is a difficult measurement problem, and its difficulty is:
Large diameter, such as an irregular shape of the chimney, a few meters long;
The gas composition varies;
Wide range of flow rates, from very low speeds to high speeds;
Dirty, dust, corrosion;
The flow channel is non-circular in cross-section, with no similarity, and the velocity distribution in the channel is complex;
There is no straight pipe section, the shape of the spoiler is complex, the speed distortion and the rotating flow;
Can not be individually calibrated to determine the meter coefficient;
Static pressure, requiring instrument low pressure loss;
High temperature (above 200°C);
The discharge of waste liquids and sewage has seriously polluted rivers and lakes, causing the water resources, which have been seriously lacking, to be destroyed. The already tense water resources are even worse. The management of waste liquids and sewage discharge is an urgent task. However, waste water and sewage flowmeters have difficulties in flow measurement due to the contamination of the measured medium, large diameter, special shape, low head pressure, wide flow velocity range, and lack of pipe flow. The number of flowmeters needed by factory enterprises and people's lives is extremely large, and the types need to be diversified to adapt to a wide range of needs. The flowmeters required for environmental protection projects will continue to put forward new requirements along with the in-depth development of the project. For example, large-scale wastewater reclamation equipment, urban waste treatment equipment, and water recycling systems of industrial and mining companies all require a wide range of flowmeters.
Carbon Steel Coil
Continuous casting slabs or primary rolling slabs are used as raw materials, heated by a stepping furnace, and dephosphorized by high-pressure water, and then enter the roughing mill. The rough rolling material is cut through the head, tail, and then into the finishing mill, and computer-controlled rolling is carried out. After the final rolling, it will go through laminar cooling (computer-controlled cooling rate) and take-up by the coiler to become a straight hair coil. The head and tail of straight hair curls tend to be tongue-shaped and fish-tailed, with poor thickness and width accuracy, and often have wavy, folded, tower-shaped and other defects on the edges. The coil is heavier and the inner diameter of the Steel Coil is 760mm. (Generally used in the pipe-making industry.) After straightening the hair through the cutting head, tail cutting, trimming and multi-pass straightening and smoothing finishing lines, and then cutting or re-rolling, it becomes: hot rolling Steel plates, flat hot rolled steel coils, slitting tapes and other products. If the hot-rolled finishing coil is pickled to remove scale and coated with oil, it will become a hot-rolled pickled coil.
Carbon Stee Coil,Carbon Steel Coil For Industrial,Hot Rolled Carbon Steel Coil,Cold Rolled Carbon Steel Coil
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