The relationship between the mass index of large and the co

Coal, as the name suggests, is the coal fired by coal-fired power plants. Are widely used by power plants burning coal, can be a burning high volatile coal, can also be a burning low volatile anthracite coal, but they all have a lot of common, in order to full combustion in the combustion process, and achieve the purpose of desulfurization, need to put all these coal grinding to a certain fineness, this would require the use of Raymond mill equipment, depending on the number of power plants using coal on the configuration of Raymond mill is also different. In the coal use of power plants, there are several criteria for the quality of coal, and below are some of the more important indicators:
1. Volatile component: volatile component is the primary index of coal ignition characteristics. The higher the volatile content, the easier the fire. According to the boiler design requirement, the value change of the coal volatile component should not be too large, otherwise it will affect the normal operation of the boiler. If the original design USES low volatile coal to replace the high volatile coal, it may be fired from the burner, as the flame center is close to the burner outlet. If the original design USES high volatile coal to burn low volatile coal, then the ignition will be delayed to make the combustion incomplete, even result in the fire extinguishing accident. Therefore, it is necessary to supply coal with volatile coal or similar coal.
2. Ash content: ash content will reduce flame propagation speed, delay of ignition time, unstable combustion, and lower furnace temperature.
Water: water is one of the harmful substances in the combustion process. It absorbs a lot of heat during combustion, which has a much greater impact on combustion than ash.
Heat: heat is an important basis for boiler design. Since the coal powder of the power plant is more adaptable to coal, so long as the heat of coal is roughly in line with the design requirements of the boiler.
5. The ash melting point: as the pulverized coal furnace chamber of a stove or furnace flame center temperature above 1500 ℃, more in such a high temperature, fly ash is mostly softening or fluid state.
6. Sulfur of coal: sulfur is the harmful impurities in coal. Although it has no effect on the combustion itself, its content is too high, and the corrosion of the equipment and the pollution of the environment are quite serious. Therefore, the sulfur content of coal is not too high, and the maximum requirement cannot exceed 2.5%.
Through the above points can be seen in the power plant used coal, there are many strict standards, from the last run, whether it is for the sake of life of the equipment, or impact on the environment, is the need to control the sulfur coal index, before use of desulfurization is a table for this important work, there are three kinds of coal desulfurization, combustion desulfurization, desulfurization and burned in the combustion desulfurization, use more is the desulphurization technology of flue gas desulfurization in burning, which is in the process of combustion to the proper temperature in the boiler area spray lime stone powder, and after the air preheater add activation reactor, is used to remove sulfur in flue gas. In this huge system not only pulverized coal burning need to processing with Raymond mill, desulfurization using limestone powder also need Raymond mill, super fine grinding processing, grinding machines, such as so large Raymond mill manufacturer equipment in power plant utilization rate is high.