Totally-premixed natural gas catalytic combustion device dispersed combustion method

A technology of dispersion combustion and catalytic combustion, which is applied in the direction of combustion methods, combustion using catalytic materials, combustion types, etc., can solve the problems of low thermal efficiency of the device, short residence time, low average flame temperature, etc., and achieve simple implementation and safe combustion Stable and safe to use

Inactive Publication Date: 2008-03-26
CENT SOUTH UNIV
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Problems solved by technology

The size of the flame is small, the average temperature of the flame is not high, and the thermal efficiency of the device is not high; there is a local high temperature zone in the furnace, and the residence time of the mixture of fuel and air in the high temperature zone is very short, and the mixing of air and fuel is not sufficient, and the combustion reaction is not complete; Local high temperature zone gives NO x Generation creates conditions, NO x high emissions

Method used

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  • Totally-premixed natural gas catalytic combustion device dispersed combustion method

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Embodiment Construction

[0011] As shown in FIG. 1 , the catalytic combustion device mainly includes a premixing chamber 1 , a uniform-porous support plate 2 and a honeycomb medium-temperature catalytic body 3 . All the gas and all the air pass into the premix chamber 3, and the support plate 2 forms the top wall of the premix chamber 1. The catalyst body 3 is placed on the support plate 2, the support plate 2 can support the weight of the catalyst body 3, and the pores are evenly distributed on the support plate 2, and the catalyst body 3 is provided with a honeycomb airflow channel for the combustion air premix to flow through. The central axes of the gas flow channels of the plate 2 and the catalytic body 3 coincide. The area downstream of the catalytic body 3 along the flow direction of the premixed gas flow is the gas phase space. The catalytic body 5 is a medium-temperature catalytic body, which can be a monolithic catalytic body or a coated catalytic body.

[0012] Natural gas and combustion-...

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Abstract

This invention is a full premix type catalytic combustion device dispersing combustion method, which integrates the technological superiority of staged combustion, catalyzing body non-directional radiation heat transfer and intense flame directional radiation heat transfer. It includes premix chamber, homogeneous hole supporting plate and intermediate temperature type honeycomb catalyzing body. Natural gas and air all pass through the premix chamber. The temperature of catalyzing body lower reach gas phase space wall is higher than 800deg.C. The catalyzing body temperature is within 600-1000deg.C. The thickness of catalyzing body is within 25-50mm. The time of premix gas passing through the catalyzing body is less than 0.1s. 2-3.75 times air theoretically needed is provided. The fuel gas portion dissipated from catalytic combustion is proportional to air supply. The premix gas out of the catalyzing body is higher than 800deg.C, with the oxygen concentration less than 15%. The catalyzing body lower reach organization undertakes dispersing combustion can dissipates the residual fuel gas. This invention is safe and simple.

Description

technical field [0001] The invention relates to a method for enlarging the flame volume of a fully premixed catalytic combustion device based on the principle of staged combustion, strengthening the non-directional radiation heat transfer of the catalytic body and the directional radiation heat transfer of the large flame in the gas phase space, which has safe and stable combustion, high efficiency and energy saving, and high combustion efficiency. Efficiency, low CO and NO x It is suitable for various industrial or civil catalytic combustion boilers or heating devices, high-temperature industrial furnaces and kilns that use natural gas or methane-rich gas for the purpose of energy saving and emission reduction. Background technique [0002] During conventional flame combustion, CO 2 The global warming effect and NO x Emissions make the sustainable development of human beings face a severe test. According to statistics in 2003, my country's GDP only accounts for about 4% ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C13/00
Inventor 艾元方蒋绍坚张全蒋受宝艾振宙周孑民梅炽徐文耀徐明
Owner CENT SOUTH UNIV
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