Porous medium burner with packed bed structure

Abstract

The invention provides a porous medium burner with a packed bed structure. The porous medium burner with the packed bed structure comprises an air inlet pipe, and a gradient type cylinder which is connected with the air inlet pipe; the upper end of the gradient type cylindrical is connected with an inner cylinder; the outer layer of the inner cylinder is wrapped with a heat preserving layer; a hole plate fills an area in the lower part of the inner layer of the inner cylinder; a setting porous medium is arranged above the hole plate; a packed bed medium is arranged above or in the middle part of the setting porous medium. The burner is applicable to positioning of heat exchange pipes of various shapes; the operation is convenient; the burning efficiency is high; the mounted hole plate is able to effectively prevent flame from burning back, and therefore, the safety of a device is improved.

Description

technical field [0001] The invention relates to a porous medium burner with a stacked bed structure, which is especially suitable for the combustion of low calorific value gases such as coal mine low-concentration gas, low-concentration natural gas and blast furnace gas, and is equipped with heat exchange tubes of various shapes. Background technique [0002] Porous media combustion technology has the characteristics of high combustion efficiency, wide lean burn limit, good flame stability, and low pollutant emission. Compared with traditional free flame combustion technology, it is very suitable for low-concentration coal mine gas, low-concentration natural gas, and blast furnace gas. Combustion of low calorific value gases. [0003] At present, the main structures of porous media burners are burners composed of foam ceramics or honeycomb ceramics and burners composed of stacked bed structures. Among them, foam ceramics and honeycomb ceramics are a fixed structure. As long...

AI Technical Summary

Problems solved by technology

The stacked bed structure is a discrete form that can meet the needs of various burner shapes and heat exchanger shapes, but its porosity is low, and its heat transfer is not as good as foam ceramics or honeycomb ceramic structures

[0004] Existing burners are all single shaped (foam ceramics or honeycomb ceramics) burners or discrete stacked bed structure burners. The former has a fixed shape that is not conducive to placement of heat exchangers, and the latter has low porosity that is not conducive to heat exchange. Become the main problem faced in engineering practice

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