Direct-current combustor for combusting high-temperature raw gas

Abstract

The invention discloses a direct-current combustor for combusting high-temperature raw gas, and belongs to the technical field of efficient clean coal combustion. The direct-current combustor solves the problems that a low-NOx combustor in the prior art is not suitable for efficient low-NOx direct-current combustion of raw gas, and due to the fact that an efficient low-NOx raw gas direct-current combustor does not exist in the prior art, a raw gas direct-current combustor cannot be configured for a segmented coupling pulverized coal combustion technology. The direct-current combustor comprises a center pipe, a raw gas inlet pipeline, a thick raw gas pipeline, a first-stage air distribution pipeline, a thin raw gas pipeline, a fire side wall plate, a porous concentration grid, a splitting grid, a bluff body, a raw gas diffusion ring, a water cooling coil cooling system and a multi-diffusion flame generator. Based on the raw gas horizontal concentration grading, multi-diffusion flame, ignition stable combustion in a bluff body vortex outer boundary layer, rich fuel combustion, water cooling and air cooling comprehensive cooling technologies, raw gas combustion is achieved. The direct-current combustor is suitable for segmented coupling pulverized coal combustion of wide coal types.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency clean coal combustion. Background technique [0002] Although a variety of coal-fired technologies have been developed at home and abroad, which are reflected in the combustion of difficult-to-burn low-volatile anthracite, lean coal, coke and other fuels, due to the physical and chemical conditions for achieving high efficiency and cleanness on the same equipment at the same time, they often restrict each other. Therefore, it is still a challenge to develop a coal combustion technology that simultaneously achieves stable ignition, high efficiency, low NOx, anti-slagging and high-temperature corrosion, fast load response, and excellent low-load performance. [0003] For the combustion of flame-retardant low-volatile anthracite, lean coal, coke and other fuels, the existing technology provides a segmented coupling pulverized coal combustion device and method, based on the different stages ...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the low NOx burner in the prior art is not suitable for the high-efficiency low NOx direct-flow combustion of raw coal gas and because there is no high-efficiency low NOx direct-flow burner for raw coal gas in the prior art, it cannot be used for To solve the problem of configuring a raw gas direct-flow burner for segmental coupling pulverized coal combustion technology, the present invention provides a direct-current burner for burning high-temperature raw gas

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