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Combustion zone pore step type porous medium burner

A technology of porous medium and porous medium layer, applied in the direction of gas fuel burners, burners, combustion methods, etc., can solve problems such as uneven flame distribution, uneven temperature distribution, and unstable flame, so as to improve combustion efficiency and avoid Temperature gradient, the effect of solving uneven flame distribution

Inactive Publication Date: 2017-09-15
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above-mentioned problems in the prior art, the present invention provides a method that can effectively solve the phenomenon of uneven flame distribution and flame instability, avoid steep temperature gradients near the flame surface, uneven temperature distribution, and the existence of local high-temperature areas, and more complete combustion. More rapid, reduce wall heat loss, improve combustion efficiency, and prolong the service life of the combustion zone pore step-type porous media burner

Method used

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  • Combustion zone pore step type porous medium burner
  • Combustion zone pore step type porous medium burner
  • Combustion zone pore step type porous medium burner

Examples

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Embodiment 1

[0033] Such as Figure 1 to Figure 3 As shown, this embodiment proposes the first preferred porous media burner with stepped pores in the combustion zone. The stepped porous media burner in the combustion zone includes a burner shell 1, and the shape of the burner shell 1 can be a circle Cylindrical or square cylindrical, also can be other shapes. The bottom of the burner casing 1 is provided with a gas inlet 8 through which gas can enter the burner casing 1 . An air inlet 7 is arranged on the side wall of the burner casing 1 near the bottom, and air can enter the burner casing 1 through the air inlet 7 . Compared with the existing air inlet 7 and gas inlet 8 which are arranged at the bottom or on the same side, the gas inlet 8 of this embodiment is arranged perpendicular to the air inlet 7, so that the air and gas can be well Mixed together, the combustion is more complete and the combustion efficiency is high.

[0034] The top of the burner casing 1 is provided with a flu...

Embodiment 2

[0046] This embodiment proposes the second preferred porous media burner with stepped pores in the combustion zone. The structure of the porous media burner is basically the same as that of the porous media burner described in Example 1, and the differences are as follows:

[0047] like Figure 4 As shown, in the present embodiment, the preheating zone 5 is filled with a porous medium with a pore density of 50PPI, and the preheating zone 5 is selected to have a plate thickness of 30mm and a macroporous ceramic foam plate with a porosity of more than 80%. Compared with the plate thickness of the preheating zone 5 in 1, the plate thickness is relatively increased, which prolongs the preheating time and improves the preheating effect.

[0048] The two annular porous medium layers and the central porous medium layer in the combustion zone jointly form a small-pore foam ceramic plate with a plate thickness of 30mm and a porosity of more than 80%. The outermost annular porous mediu...

Embodiment 3

[0051] This embodiment proposes a third preferred porous media burner with stepped pores in the combustion zone. The structure of the porous media burner is basically the same as that of the porous media burner described in Example 1, and the differences are as follows:

[0052] like Figure 5 As shown, in the present embodiment, the preheating zone 5 is filled with a porous medium with a pore density of 55PPI, and the preheating zone 5 selects a plate thickness of 40mm and a macroporous ceramic foam plate with a porosity of more than 80%. The plate thickness of the preheating zone 5 in Example 2 is thicker, the preheating time is prolonged, and the preheating effect is further improved.

[0053] The two annular porous medium layers and the central porous medium layer in the combustion zone jointly form a small-pore foam ceramic plate with a plate thickness of 40mm and a porosity of more than 80%. The outermost annular porous medium layer 2 is filled with a porous medium with...

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Abstract

The invention discloses a combustion zone pore step type porous medium burner, and relates to the field of burners. The burner comprises a burner outer shell, and a protection zone, a preheating zone and a combustion zone are sequentially arranged in the burner outer shell in the air current flow direction; the preheating zone and the combustion zone are filled with porous media; a plurality of porous medium layers of different pore density are formed in the combustion zone in the radial direction; and pore density of the porous media of the porous medium layers in the combustion layer is smaller than pore density of the porous media of the preheating zone. According to the combustion zone pore step type porous medium burner, sharp temperature gradient, nonuniform temperature distribution and local high temperature zones near a flame surface can be effectively avoided, the phenomena of nonuniform flame distribution and unstable flame are successfully avoided, combustion is more sufficient, NOx and CO emission is greatly reduced, solid temperature of the wall surface can be regulated, heat loss of the wall surface is reduced, combustion efficiency of the burner is improved, temperature change of solids is smooth, thermal stress is low, and service life of the burner is prolonged.

Description

technical field [0001] The invention relates to the field of burners, in particular to a porous medium burner with stepped pores in a combustion zone. Background technique [0002] Fossil energy has always been the main body of the world's energy structure, and more than 80% of the world's energy today comes from the combustion of fossil fuels. However, fossil energy is a non-renewable resource and will be exhausted in the near future. Therefore, in order to establish a sustainable economic model, improve the energy structure, improve energy consumption patterns, and increase the effective utilization of energy, it is necessary to make full use of industrial production and energy production. A variety of low calorific value gas to achieve efficient and clean utilization of conventional energy. The combustible components of low-calorific-value gas are thin, and it is difficult to effectively use conventional combustion technology. How to realize the effective combustion of t...

Claims

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Application Information

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IPC IPC(8): F23D14/02F23D14/46F23D14/84F23D14/26
CPCF23D14/02F23D14/26F23D14/46F23D14/84
Inventor 刘慧李东刚戎泽波杨晓晰王越
Owner NORTHEASTERN UNIV
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