Gas premixing porous-medium combustor achieving axial and radial stable combustion

Abstract

The invention relates to a porous-medium combustor, in particular to a gas premixing porous-medium combustor achieving axial and radial stable combustion. The gas premixing porous-medium combustor achieving axial and radial stable combustion comprises a heat preservation layer, a combustion area porous medium, a stable combustion body, a stable combustion porous plate, a backfire preventing area porous medium, a flow equalizing board, a premixing chamber, a gas inlet and an air inlet. The gas inlet and the air inlet are connected with the premixing chamber. The flow equalizing plate, the backfire preventing area porous medium, the stable combustion porous plate and the combustion area porous medium are sequentially arranged on the premixing chamber from bottom to top. The stable combustionbody is a conical body and made of a high-temperature-resistant austenite steel material, and the stable combustion body is arranged at the axis of the combustor. The pore diameters of the stable combustion porous plate are sequentially reduced in the radial direction from inside to outside. The stable combustion porous plate is made of the high-temperature-resistant austenite steel material andarranged on the stable combustion body in a sleeving manner. The stable combustion body and the stable combustion porous plate improve the heat load distribution evenness of the porous medium in the axial direction and the radial direction, the stability of a premixed flame is improved, the combustion efficiency is improved, and the pollutant emission is lowered.

Description

technical field [0001] The invention relates to a porous medium combustion device, in particular to a premixed gas porous medium burner with axial and radial stable combustion. Background technique [0002] Energy shortage and environmental pollution are the main problems restricting my country's economic development. Therefore, improving energy utilization rate and realizing clean energy utilization are important ways to solve the above problems. Porous media combustion is a special combustion method of gas in porous materials with good thermal conductivity and high temperature resistance. Compared with traditional free space combustion flames, porous media combustion technology has shown unique advantages, mainly in: combustion rate And high combustion intensity; wide combustion area, uniform temperature distribution; high combustion efficiency, low pollutant emissions; widened lean flammable limit, large load regulation ratio; compact structure, small equipment volume. ...

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Problems solved by technology

[0004] In the application of the above porous media combustion technologies, several problems are faced: the instability of the premixed flame in the porous media, the inclination, rupture and flameout of the combustible gas during the combustion process of the porous media; due to the unique structure of the porous media The problem of uniformity leads to uneven distribution of heat load inside the burner, unstable combustion, and increased pollutant emissions; the porosity near the side wall of the burner is higher than that in the center of the burner, resulting in more consumption of premixed gas near the side wall , resulting in increased heat loss

These unstable problems seriously restrict the promotion of porous media combustion technology

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