- Jan 02, 2019 -


The burner is the main combustion equipment of the boiler. It sends the fuel and the air required for combustion into the furnace through various forms, so that the fuel can quickly and stably ignite according to a certain airflow structure; the air is continuously supplied in layers to make the fuel and The air is thoroughly mixed to increase the burning strength. In order to meet the needs of national economic development, the total installed capacity of domestic power plants has increased to a large extent, and the single-machine capacity has also developed from small and medium-sized capacity to large-capacity and high-parameters. The corresponding power grid is also larger and more complex. As the capacity of the unit increases, the structure of the equipment becomes more and more complex, and the requirements for the safety and economy of the unit are bound to become higher and higher. In the process of electric power production, a large amount of pollutants are generated, and NOx has a great impact on environmental pollution. At the same time, China's restrictions on power plant exhaust emissions are becoming more and more strict, and it is necessary for power plants to carry out emission reduction and harmless technology treatment. In addition, the problem of unstable combustion has been plaguing China's coal-fired power station boilers. In the past two decades, with the increase in the proportion of large-capacity units, the problem of unstable combustion of boilers has been alleviated. However, in recent years, due to the decline in the quality of coal combustion, large-capacity unit coal-fired boilers have also experienced problems of unstable combustion, and are becoming more and more serious. This not only reduces the low-load operation capacity of large-capacity boilers, but also significantly increases the incidence of boiler fires. The burner is manufactured according to the principle of ensuring the normal ignition of the boiler burner and the stable combustion effect, ensuring that the content of NOx emission reduction is within the control range, without changing the geometrical dimensions of the furnace; retaining the original large wind box; the ignition mode is unchanged; The burner body, the burner bellows air duct and the baffle bellows are redone under the condition that the damper and the burner swing actuator are unchanged, and the four-corner tangential combustion method is optimized to solve the above problems.

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