High-efficiency catalytic combustion device and combustion method for low-concentration methane containing dust and sulfur

Abstract

The invention discloses an efficient catalytic combustion device of dust-contained sulfur-contained low-concentration methane. The efficient catalytic combustion device comprises a combustor and a smoke circulation preheating unit, an insulating layer is arranged on the outer wall of the combustor, a dust removal plate, a preheating cavity, a sulfur removal adsorption layer and a catalytic combustion layer are sequentially arranged in the combustor from bottom to top, a gas inlet cavity is formed below the combustor, a reverse gas blowing unit is arranged above the combustor, a low-concentration methane inlet pipe and a blowing gas outlet pipe are arranged on the side wall of the gas inlet cavity, a preheating cavity gas inlet pipe and a preheating cavity gas outlet pipe are arranged on the side wall, corresponding to the preheating cavity, of the combustor, and the smoke circulation preheating unit comprises a smoke outlet pipe, a fourth electromagnetic valve and a heat exchanger. The invention further discloses an efficient catalytic combustion method. According to the efficient catalytic combustion device and method, the vertical layout of positive catalyst combustion and reverse blowing reduction is adopted, and operation is simple; in the positive catalytic combustion, efficient catalytic combustion of the low-concentration methane can be kept through the working procedures such as dust removal, preheating and sulfur removal.

Description

technical field [0001] The invention relates to the field of purification and catalytic combustion of low calorific value gas containing dust and sulfur, in particular to a combustion device and a combustion method for removing dust and sulfide, high-efficiency combustion, and reverse purging to restore catalytic activity. Background technique [0002] There are a lot of low-calorific-value gases in mine coalbed methane and chemical waste gas. These gases contain low-concentration methane gas and are rich in reserves. However, due to the low methane content, it is difficult to directly use it. Catalytic combustion is characterized by its high conversion rate and Low pollution emissions have received extensive academic and engineering attention. In the actual process, low calorific value gases such as coalbed methane extracted from mines usually contain different forms of dust particles, sulfides, water vapor, etc. Although the content of these impurity gases is low, they pla...

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Problems solved by technology

However, the above-mentioned studies reported efficient catalytic combustion methods for adsorption desulfurization or methane, and the removal process of impurity gases in methane is relatively complicated, and it is impossible to achieve the removal and catalytic combustion of impurity gases in the same device, let alone consider the process of combustion The device realizes the active regeneration of the catalyst, dust purging and other functions. Therefore, the removal of raw gas dust, sulfide and other impurity gases, high-efficiency catalytic combustion, catalyst active regeneration and dust purging are realized in the same combustion device. Function to be further developed

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