Liquid slag type low nitrogen powder burner

Abstract

The invention relates to powder combustors, in particular to a liquid slagging type low-nitrogen powder combustor. The liquid slagging type low-nitrogen powder combustor comprises a powder spray gun, a primary air chamber and a secondary air chamber and further comprises a slag combustion chamber. The primary air chamber is arranged on one side of the slag combustion chamber, the secondary air chamber is arranged on the other side of the slag combustion chamber, and the primary air chamber is connected with the powder spray gun. A primary low-oxygen reflux cooling air inlet is formed in the slag combustion chamber. A liquid slagging mechanism is arranged on the slag combustion chamber, a slag falling opening of the liquid slagging mechanism is led out of the bottom of the slag combustion chamber, and a slag falling water trough is formed corresponding to the slag falling opening. By means of changing of the slagging manner and the combustion atmosphere of the combustor, emission of nitric oxide, hearth coking, low-heating-value coal dust stable combustion, low-ash-fusion-point coal dust combustion and other problems can be effectively controlled, the coal type adaptation capability can be greatly improved, and the liquid slagging type low-nitrogen powder combustor adapts to low-heating-value and low-ash-fusion point coal dust combustion.

Description

technical field [0001] The invention relates to a powder burner, in particular to a liquid slag discharge type low-nitrogen powder burner. Background technique [0002] Existing pulverized coal burners have put forward higher requirements on the calorific value, volatile matter, ash content, and ash melting point of the suitable coal types. However, the reserves of pulverized coal that can meet the requirements have been greatly reduced, and the price of coal continues to rise. Increased operating costs, but also caused a lot of low-quality coal idle. [0003] CN103062759A discloses a bottom-mounted vertical boiler with a powder burner, the powder burner of which still belongs to the traditional powder burner that discharges slag in the form of fly ash. Because the ash melting point of coal ash needs to be considered, the temperature of the furnace must be controlled at about 1000°C. If it exceeds 1100°C, the coal ash may melt in the furnace and adhere to the water wall of ...

AI Technical Summary

Problems solved by technology

Because the ash melting point of coal ash needs to be considered, the temperature of the furnace must be controlled at about 1000°C. If it exceeds 1100°C, the coal ash may melt in the furnace and adhere to the water-cooled wall of the furnace to cause coking accidents.

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