The boiler is a kind of energy conversion equipment, the energy input to the boiler is chemical energy and electrical energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain thermal energy. The hot water or steam produced in the boiler can directly provide the required heat energy for industrial production and people's lives, and can also be converted into mechanical energy through steam power devices, or converted into electrical energy through generators.
The boiler that provides hot water is called a hot water boiler, which is mainly used in life, and there are also a small number of applications in industrial production. The boiler that produces steam is called a steam boiler, often referred to as a boiler, and is mostly used in thermal power stations, ships, locomotives and industrial and mining enterprises.
After the boiler enters the boiler, the heating surface of the boiler in the steam-water system transfers the absorbed heat to the water, so that the water is heated into hot water at a certain temperature and pressure or generates steam, which is led out of the application. In the combustion equipment part, the fuel combustion continuously releases heat, and the high-temperature flue gas generated by combustion transmits the heat to the heating surface of the boiler through the propagation of heat, and the temperature itself gradually decreases, and finally discharges from the chimney.
The exhaust process of the boiler, i.e. the emission of flue gas, has a crucial impact on the efficiency and environmental performance of the boiler. The correct boiler exhaust method can not only ensure the efficient operation of the boiler, but also effectively reduce environmental pollution and improve energy utilization. The following will systematically analyze and explain the correct method of boiler exhaust gas in combination with different use cases.
The basic principle of boiler exhaust is to minimize heat loss and pollutant emissions while ensuring safety. The design of the exhaust system should take into account the combustion characteristics of the boiler, the type of fuel, the change of load and other factors to ensure that the flue gas can be discharged smoothly, and at the same time prevent the flue gas backfilling and the furnace pressure from being too high or too low.
1.Exhaust during normal operation
During the normal operation of the boiler, the exhaust system should remain stable and efficient. The flue gas should be designed through a reasonable flue to ensure that it enters the dust collector and desulfurization device at the appropriate temperature to reduce the emission of particulate matter and harmful gases. At the same time, the exhaust system should be regularly inspected and maintained to ensure that it is in good working order.
2.Exhaust during start-up and shutdown
During the start-up and shutdown of the boiler, it is easy to cause changes in the composition and temperature of the flue gas due to the unstable combustion. Therefore, in these special cases, corresponding measures should be taken, such as adjusting the combustion parameters and increasing the amount of smoke exhaust, etc., to ensure that the flue gas can be discharged smoothly and reduce the impact on the environment.
3.Exhaust gas when the load changes
When the boiler load changes, the combustion conditions are adjusted accordingly. In order to ensure the smooth discharge of flue gas and the efficient operation of the boiler, the parameters of the exhaust system, such as exhaust temperature, exhaust volume, etc., should be adjusted in time according to the load change.
4.Exhaust under abnormal operating conditions
When the boiler has abnormal working conditions, such as unstable combustion and furnace slag formation, it is easy to cause flue gas emissions to exceed the standard. At this time, emergency measures should be taken, such as putting in accelerants, adjusting the burner, etc., to restore the normal operation of the boiler and reduce the impact on the environment.
1.Fuel type and nature
Different types of fuels have different combustion characteristics and pollutant emission characteristics. Therefore, when choosing fuel, its influence on boiler exhaust should be fully considered. Even if it is the same fuel, its properties may vary depending on the origin, batch and other factors, which will have an impact on the boiler exhaust. Therefore, during use, the fuel should be regularly tested and analyzed to ensure that it meets the requirements of use.
2.Combustion methods and parameters
The influence of combustion mode and parameters on boiler exhaust gas is very significant. Reasonable combustion mode and parameter setting can not only improve the thermal efficiency of the boiler, but also reduce the emission of pollutants. By optimizing the structure of the burner and adjusting the parameters such as combustion air volume, the combustion conditions can be improved and the content of harmful substances in the flue gas can be reduced.
3.Exhaust system design and health
The design and operation of the exhaust system directly affect the exhaust effect of the boiler. Factors such as proper flue design, efficient dust removal and desulfurization devices, and stable exhaust air volume are all key to ensure boiler exhaust effect. Therefore, these factors should be fully considered in the design and operation process to ensure the performance and stability of the exhaust system.
4.Environmental factors
Environmental factors such as temperature, humidity, atmospheric pressure, etc., can also have an impact on boiler exhaust. For example, at low temperatures, water vapor in the flue gas may condense into water droplets, resulting in an increase in the content of harmful substances in the flue gas. Therefore, under different environmental conditions, corresponding measures should be taken to ensure the stability and compliance of boiler exhaust.
Boiler exhaust is an indispensable and important part of boiler operation. The correct boiler exhaust method can not only ensure the efficient operation and environmental performance of the boiler, but also improve energy utilization and reduce environmental pollution. In practical application, reasonable exhaust measures should be taken in combination with the specific situation and use environment of the boiler, comprehensively considering various factors.
In the future, with the continuous improvement of environmental protection requirements and technological progress, boiler exhaust technology will continue to develop and improve, providing strong support for the realization of green, efficient and sustainable energy utilization.