a dense burner

Abstract

The present invention provides a rich-lean burner, which comprises: two pulverized coal inlet pipes, one end of which is a pulverized coal inlet, and the other end intersects each other in a V shape; Deflector, the interior of the deflector is the main pulverized coal pipeline, and the exterior is the secondary pulverized coal pipeline; the nozzle is trumpet-shaped and connected to the deflector; and a plurality of blunt components are distributed around the nozzle near the outlet end, Among them, the horizontal main pipe is connected to the pulverized coal inlet pipe with a 150° round chamfer, which makes the concentration of pulverized coal on both sides of the horizontal main pipe lower than the concentration in the center, thereby completing the initial concentration separation of pulverized coal. The deflector is close to the coal The side of the pulverized coal inlet pipe is at an angle of 120° to 150° to the direction of the pulverized coal flow. It is used to separate the low-concentration pulverized coal on both sides of the main pulverized coal pipeline into the auxiliary pulverized coal pipeline. The nozzle prevents the pulverized coal from quickly spreading to the The boundary makes the middle concentration of pulverized coal at the spout high and the surrounding concentration low, thus completing the separation of thick and thin.

Description

technical field [0001] The invention relates to a burner, in particular to a rich-lean burner. Background technique [0002] According to statistics from relevant departments, the annual power generation in 2017 was 6,275.8 billion kwh, of which thermal power generation was 4,611.5 billion kwh, and thermal power generation accounted for nearly 73.5% of the total annual power generation. Energy structure, which also means that my country's electricity will be composed of coal-fired power generation for a long time in the future. With the increasing economic and comprehensive national strength of our country, the accompanying environmental problems are becoming more and more serious. After the improvement of people's living standards, people's pursuit of the environment is getting higher and higher. Therefore, the State Council and various localities have put forward stricter requirements for pollutant discharge standards. . In December 2015, the State Council proposed the co...

AI Technical Summary

Problems solved by technology

[0003] Current Power Plant Reduces NO x The most common way is the SCR method and the SNCR method, but as the requirements for environmental protection become lower and lower, more and more ammonia is required, which leads to ammonia escape, and the ammonia gas will undergo complex chemical reactions with the components in the flue gas to form hydrogen sulfate Ammonia and ammonia bisulfate will block and corrode the air preheater, greatly affecting the life of the air preheater, and in severe cases, it will lead to shutdown for renovation

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