Combined Oxidation Bed of Coal Mine Ventilation Air Preheating Catalytic Oxidation Device

A catalytic oxidation bed, catalytic oxidation technology, applied in chemical/physical processes, chemical instruments and methods, etc., can solve the problems of poor operation stability, low oxidation efficiency, and high light-off temperature, and achieve enhanced flow capacity and improved methane oxidation rate. , the effect of reducing the light-off temperature

Active Publication Date: 2015-10-14
SHANDONG UNIV OF TECH
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Problems solved by technology

However, the catalytic oxidation bed of this oxidizer is filled with a single catalyst, which has problems such as high light-off temperature, low oxidation efficiency, and poor operation stability, and needs to be further improved.

Method used

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  • Combined Oxidation Bed of Coal Mine Ventilation Air Preheating Catalytic Oxidation Device

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings. exist figure 1 In the shown embodiment: including the uniform temperature and uniform flow bed 1 and the catalytic oxidation bed arranged along the air flow direction, wherein the uniform temperature and uniform flow bed 1 is formed by stacking honeycomb ceramic regenerators, and along the air flow direction, the catalytic oxidation bed consists of 3 Composed of catalytic oxidation layers 2, each catalytic oxidation layer 2 is filled with a honeycomb catalyst, there is a gap 3 of 3 mm between adjacent catalytic oxidation layers 2, and the catalysts filled in the three catalytic oxidation layers 2 are arranged along the airflow direction. The active component loading, specific surface area and pore density all decrease stepwise, and the active component loading of catalysts filled with adjacent catalytic oxide layers 2 differs by 100g / m 3 , the specific surface area diff...

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Abstract

The invention relates to a combined oxidation bed for a coal mine ventilation air preheating catalytic oxidation device, and belongs to the technical field of oxidation of superlow density methane. The combined oxidation bed comprises a uniform-temperature and flow-equalizing bed and a catalytic oxidation bed, wherein the uniform-temperature and flow-equalizing bed is formed by stacking honeycomb ceramic heat retainers, in the airflow direction, the catalytic oxidation bed is composed of a plurality of catalytic oxidation layers, each catalytic oxidation layer is formed by filling a honeycomb-type catalyst, and the active component loading amount, the specific surface area and the hole density of the filled catalyst of the catalytic oxidation layers are reduced gradually. The combined oxidation bed has the advantages of low initiation temperature, high oxidation efficiency, good operational stability and the like.

Description

technical field [0001] The invention provides a combined oxidation bed of a coal mine exhaust air preheating catalytic oxidation device, which belongs to the technical field of ultra-low concentration methane oxidation. Background technique [0002] The main component of coal mine gas is methane, which is a gas energy that can be utilized. However, in order to improve the safety of coal mine production, a large amount of ventilation is usually used to dilute the gas and discharge it directly into the atmosphere. On the one hand, the direct emission of exhaust gas from coal mines has caused a huge waste of limited non-renewable resources, and on the other hand, it has also exacerbated air pollution and the greenhouse effect: the greenhouse effect of methane in 100 years is 21 times that of carbon dioxide, and methane accounts for 17% of global warming share, second only to carbon dioxide. At present, my country's coal mines emit as much as 20 billion Nm of methane into the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/02
Inventor 郑斌刘永启刘瑞祥毛明明孟建
Owner SHANDONG UNIV OF TECH
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