Nanoparticle surface modified active semi-coke compound desulfurization denitrification agent and preparation method thereof

Abstract

The invention provides a nanoparticle surface modified active semi-coke compound desulfurization denitrification agent, which is compounded by active semi-coke and nanoparticle. The invention improves desulfurization efficiency by the high specific surface area, the catalysis characteristic and the oxidizzation characteristic of nano materials, and can catalytically oxidize nitric oxide in smoke,thereby achieving the aim of denitrification.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a nano particle surface modified active semi-coke compound desulfurization and denitrification agent and a preparation process thereof. Background technique [0002] Many treatment methods have been developed for the sulfur pollution of coal combustion at home and abroad. According to the process, there are three types: dry method, semi-dry method and wet method. [0003] Wet desulfurization agent is currently the world's leading SO control 2 The main desulfurization methods for pollution and acid rain prevention and control mainly include: lime / gypsum method, ammonia water method, sodium sulfite circulation method, magnesium oxide-magnesium sulfite method, seawater method, etc. Wet desulfurization technology has the advantages of mature technology and high desulfurization efficiency. However, the treatment of desulfurized wastewater has problems such ...

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Problems solved by technology

Wet desulfurization technology has the advantages of mature technology and high desulfurization efficiency. However, the treatment of desulfurized wastewater has problems such as huge equipment, high energy consumption, and high cost.

At present, my country mainly adopts wet desulfurization technology, among which lime / gypsum method is mainly used. Although the desulfurization efficiency is high and the technology is mature, there are a lot of problems: first, a large amount of CO needs to be discharged when preparing CaO 2 , the product of its desulfurization agent is gypsum. Due to its loose texture, desulfurization gypsum has no economic value for recycling and is discarded. The waste desulfurization gypsum stacked and stored occupies a large amount of land, and at the same time it is easy to release toxic substances, causing secondary pollution; China is a country with a large sulfur deficiency, and the sulfur in the flue gas is wasted with the formation of gypsum

However, these desulfurizers have their own advantages and disadvantages, such as short service life and high operating costs (activated carbon containing iodine or nitrogen), expensive (activated carbon fiber), or low desulfurization efficiency, etc.

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