The prevention and control measures of industrial coal-fired boiler smoke and dust mainly start from two aspects:

(1) Improve the combustion mode of the boiler so that the fuel in the boiler can be completely burned, especially the manual combustion furnace should be eliminated, and the chain furnace and other mechanized combustion methods should be adopted.

(2) Correct selection of boiler dust removal equipment
The boiler dust removal equipment in coal-fired power plants is not only environmental protection equipment, but also one of the main production equipment in power plants. Therefore, when designing the bag-type dust collector system and selecting the filter material, it is necessary to ensure the long-term reliable operation of the bag-type dust collector, and fully consider the boiler and its auxiliary operating conditions, fuel and dust characteristics and possible problems in operation.

Under the condition that the fuel remains unchanged, the characteristics of the dusty flue gas mainly depend on the combustion conditions of the boiler, and also on the design of the dust removal system. The change of boiler load, the selection and operation conditions of pulverized coal mill, economizer and air preheater, and the opening of induced draft fan for primary fan and secondary fan all directly affect the dust concentration of flue gas. The particle size directly affects the flue gas volume, the particle size, oxygen content and nitrogen oxide content of flue gas, and the air leakage and thermal insulation of the system are also factors that cannot be ignored.

The operating conditions of the boiler directly affect the bag filter of the boiler, and the reliability of the bag filter system directly affects the safety of the boiler. If the dust removal system fails due to broken bags, the impeller of the boiler induced draft fan will wear faster; It is very dangerous to increase the resistance, reduce the suction force of the induced draft fan and cause the positive pressure of the boiler due to the serious dust sticking on the filter bag. Therefore, when designing the bag-type dust removal system of coal-fired power plants, dust removal must be taken as an important part of the boiler. When designing the system, automatic monitoring, automatic control, fault diagnosis and emergency measures should be fully considered. It should also be specifically implemented in the development of operating procedures, post responsibility system and maintenance management. Experience and lessons tell us that a successful project must have comprehensive and reasonable design, select reliable instruments, meters and equipment, meticulous installation and manufacturing, careful maintenance, and strict operation management.