Distributary thickening braize decoupling burner and burning method

Abstract

The invention discloses a distributary thickening braize decoupling burner which comprises a nozzle, a distributary separation plate and more than two powder collecting flame holders. The distributary separation plate is slantly arranged on the middle portion of the nozzle, and two ends of the distributary separation plate are connected with an outer casing of the nozzle. The nozzle is divided into a thin side airflow channel and a thick side airflow channel, circulation section areas of the thick side airflow channel along the airflow direction gradually increase, and the powder collecting flame holders are located on the side of the thick side airflow channel. Back end cross sections of the powder collecting flame holders are of step-shaped structures which are gradually reduced from the edge of the nozzle to the center, and a deversoir is arranged on each step. The distributary thickening braize decoupling burner can delay mixing of thin powder airflow and thick powder airflow, improves decoupling burning effects, and has the advantages of being simple in structure, easy to maintain, capable of jointing with any braize concentration device, high in flexibility and strong in adaptability of different furnace profiles and different burned coal types and the like.

Description

technical field [0001] The invention relates to the field of pulverized coal combustion equipment, in particular to a pulverized coal decoupling burner and a combustion method for diversion and enrichment. Background technique [0002] In the practical application of pulverized coal combustion, with the increase of the combustion temperature and oxygen concentration of the pulverized coal-air mixture in the combustion stage, the pulverized coal is more likely to be burned quickly and fully, and the fly ash combustibles (unburned carbon and CO ) content is reduced, but at the same time, high temperature oxygen enrichment will make the NO produced in the combustion process x On the other hand, the lower the combustion temperature and oxygen concentration of the pulverized coal-air mixture in the combustion stage, the better the suppression of nitrogen oxides NO x Generated, but coal dust is less likely to burn out. Therefore, the removal of fly ash combustibles and NO from p...

AI Technical Summary

Problems solved by technology

In addition, when the pulverized coal air flow passes through the powder collector and flame stabilizer, most of the coal dust collected by the powder collector and flame stabilizer is concentrated on the surface of the powder collector and flame stabilizer. When the flow is open, part of the collected coal powder will be brought to the low concentration area, thereby reducing the effect of the powder collector and flame stabilizer on separating the wind powder

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