Novel swirl pulverized coal burner

Abstract

The invention relates to a novel swirl pulverized coal burner mainly comprising a primary air duct, a secondary air duct, a pulverized coal concentrator and a tertiary air duct, wherein the primary air duct communicates with the tertiary air duct through the pulverized coal concentrator; the secondary air duct is arranged at the inner outlet of the primary air duct, and communicates with the pulverized coal concentrator; the secondary air duct comprises an outer swirl secondary air duct and an inner swirl secondary air duct, wherein the side wall of the outlet front end of the outer swirl secondary air duct is provided with a lug boss, and the inner wall of the lug boss is provided with a control rod; the outlet front end of the inner swirl secondary air duct is provided with a conical necking-down port; and the outer wall of the inner swirl secondary air duct is provided with swirl vanes connected to the control rod. According to the novel swirl pulverized coal burner, by adopting thepulverized coal concentrator with a simple structure, the separation of thick and thin pulverized coal stream is achieved, and high-efficiency stable combustion with low volatile coal is ensured; thedischarge of nitrogen oxides is reduced; and at the same time, no furnace slagging is ensured, and no high-temperature corrosion is generated, etc.

Description

technical field [0001] The invention belongs to the technical field of combustion, and relates to a novel swirl pulverized coal burner, in particular to a radial thick-thin secondary air multi-stage graded swirl pulverized coal burner. Background technique [0002] The electric power industry is the basic energy industry. Currently, coal-fired thermal power generation accounts for more than 70% of my country's total power generation. At present, my country is vigorously developing nuclear power generation and various new energy power generation technologies. my country is rich in coal resources, but due to factors such as the long construction period of nuclear power plants, the high cost of new energy power generation, and the small capacity of a single unit, so in the future for a long period of time, Coal-fired thermal power generation is still the main way of generating electricity in my country. High-efficiency and low-pollution coal-fired power generation technology is...

AI Technical Summary

Problems solved by technology

However, there are generally problems such as poor adaptability of coal types (difficult to apply to anthracite lean coal with low volatile content), severe high-temperature corrosion and coking, low NOx emission reduction efficiency, and severe wear of the center tube of some burners.

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