Working condition characteristics of coal-fired power plants

The dust concentration at the entrance of the dust collector is relatively high;

The content of SO2,NOX,02,03 and other components which have strong destructive effect on filter materials in flue gas is relatively high.

The flue gas volume fluctuates greatly due to the change of coal type and power generation load;

The filtering wind speed is generally about 1.0, and most of the dust cleaning methods are pulse dust cleaning or rotary backwashing.

Coking is easy to occur during combustion, with high concentration of smoke and dust, high temperature, and easy secondary combustion. After combustion, sticky components are easy to cause paste bags. Filter products with high temperature resistance and corrosion resistance are selected, and the following products are recommended.

Filter cloth: filter cloth is a main filter medium. The selection and use of filter cloth plays a decisive role in filtering effect. When selecting, it is necessary to select suitable filter cloth material and pore size according to factors such as PH value of filtered materials, solid particle size, etc. to ensure low filtration cost and high filtration efficiency. When using, it is necessary to ensure that the filter cloth is flat and not discounted, and the pore size is smooth.

Fiberglass filter cloth: The yarn is fluffy, with strong covering ability and good air permeability, which can improve the filtration efficiency and reduce the filtration resistance, and the dust removal efficiency can reach over 95.9%. It is mainly used for dust reduction in high temperature atmosphere and recovery of valuable industrial dust. For example, industries such as cement, carbon black, steel, metallurgy, electric power generation and coal-fired furnaces.

Coated filter cloth: it is composed of more than two kinds of filter cloth or filter paper, so as to achieve special filtering effect.