Low NOx combustor allowing cross-load regulation and used for biomass or pulverized coal

Abstract

The invention discloses a low NOx combustor allowing cross-load regulation and used for biomass or pulverized coal. The low NOx combustor comprises a secondary air sleeve connected to a pre-combustionchamber shell body, and a pre-combustion chamber is sleeved with an SOFA air sleeve; and an outer primary air sleeve, an inner secondary air sleeve and an inner primary air sleeve are sequentially arranged in the secondary air sleeve in a sleeved mode, a central tube is sleeved in the inner primary air sleeve, the end part of the central tube is fixedly provided with an ignition system which is composed of an oil gun or a fuel gas gun, a high-energy igniter and an ignition thruster used for pushing the oil gun or the fuel gas gun and the high-energy igniter to move forwards and backwards in the central tube, and the oil gun or the fuel gas gun and the high-energy igniter extend into the pre-combustion chamber from the tail end of the central tube. The low NOx combustor selects to enable secondary air use to be put into use to meet the cross-load regulation according to actual load requirements; and the adaptability of the combustor to different combustion modes of the biomass / the pulverized coal is enhanced through fuel staged distribution. The low NOx combustor is compact in structure, high in adaptability, good in pulverized coal combustion stability and capable of effectively reducing the generation and emission of NOx.

Description

technical field [0001] The invention belongs to the technical field of thermal energy and power engineering, and relates to a swirl burner, in particular to a low-NO burner which can be used for separate combustion or co-combustion of biomass / coal powder and can be adjusted across loads. x The burner is used to enhance the adaptability of the burner to different combustion methods of biomass / coal (separate combustion, co-combustion), meet cross-load adjustment, improve the stability of biomass / coal combustion and reduce biomass / coal NO during combustion x generate. Background technique [0002] At present, coal is the main form of energy consumption in my country. According to the "China Statistical Yearbook" statistics, in 2016, my country's total energy consumption reached 4.36 billion tons of standard coal, of which coal as a fossil energy accounted for 62% of energy consumption. According to the "National Electric Power Industry Statistical Bulletin", my country's coa...

AI Technical Summary

Problems solved by technology

However, the single pulverized coal pre-combustion technology needs to set the pre-combustion chamber before the burner, and the pre-combustion chamber needs to be heated by an external heat source, which not only complicates the entire combustion device, but also requires the consumption of external fuel to maintain the normal operation of the system

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