Swirl burner for burning high-temperature raw gas

Abstract

The invention relates to a swirl burner for burning high-temperature raw gas, and belongs to the technical field of efficient clean coal burning. The problems that in the prior art, a low-NOx burner is not suitable for high-efficiency low-NOx swirl burning of the raw gas, and due to the fact that a high-efficiency and low-NOx raw gas swirl burner does not exist in the prior art, raw gas swirl burners cannot be configured for a segmented coupled pulverized coal burning technology are solved. The swirl burner mainly comprises a central pipe, an inner peripheral air channel, a raw gas channel, anouter peripheral air channel, a water-cooling coil cooling system and a diffusion small flame generator; and on the basis of the raw gas diffusion small flame, the weak swirl vortex outer boundary layer ignition and stable burning, the fuel rich burning, the air classification and the water-cooling and air-cooling comprehensive cooling technology, burning of the raw gas is achieved. The swirl burner has the characteristics of absolute ignition and stable combustion, inhibition of fuel type and thermal type NOx generation, high efficiency, slagging resistance, high-temperature corrosion resistance, excellent load response and reliable cooling, and the swirl burner is suitable for staged coupling pulverized coal burning of a wide range of coal types.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency clean coal combustion. Background technique [0002] With the continuous growth of China's GDP, energy demand is also growing. Coal still accounts for more than 70% of China's primary energy composition. It is estimated that by 2030, China's coal will still account for more than 50% of the total primary energy consumption, and the consumption will reach about 4.5 billion tons. The average comprehensive utilization efficiency of power generation and heat supply in China is only about 40%, which is 10 percentage points lower than that of developed countries, and NOx emitted by coal combustion accounts for 75%. Among China's proven mineable coal reserves, low-quality coal accounts for about 50%, and the proportion of anthracite and lean coal alone is close to 30%, and a large amount of coke produced by lignite upgrading or low-temperature pyrolysis is in urgent need of new combustion and gas...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that low NOx burners in the prior art are not suitable for high-efficiency low NOx swirl combustion of raw coal gas and that there is no high-efficiency low NOx swirl burner for raw coal gas in the prior art, making it The problem that the raw coal gas swirl burner cannot be configured for the segmented coupling pulverized coal combustion technology, the invention provides a swirl burner for burning high-temperature raw coal gas

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