On-line regeneration system and method of flue gas denitration catalyst

Abstract

The invention provides an on-line regeneration system and a method of a flue gas denitration catalyst. The system comprises a gas duct external system, a gas duct internal system and a connection pipeline. The gas duct external system comprises a regeneration medium storage or generation component, a regeneration medium heating component and a generation medium conveying component. The gas duct internal system comprises a regeneration medium distribution component which is arranged in a gas duct and capable of moving to positions above any catalyst modules in the gas duct. A regeneration medium is conveyed into the regeneration medium distribution component in the gas duct to carry out catalyst regeneration steps including soot blowing, cleaning, drying and activation on the catalyst modules in the gas duct through regulation and starting and closing of the regeneration medium storage or generation component, the regeneration medium heating component and the generation medium conveying component in the gas duct external system, and the catalyst modules do not need to be moved out of the gas duct for regeneration. The on-line regeneration system and the method of the flue gas denitration catalyst avoid damage to the catalyst modules in the process of moving, simplify operation steps, reduce energy consumption, save cost and improve work efficiency.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to an online regeneration system and method for a flue gas denitrification catalyst. Background technique [0002] Recently, the country has promulgated a more stringent emission standard of air pollutants for thermal power plants GB13223-2011, which will be implemented from January 1, 2012. Among them, higher standards are set for the emission of nitrogen oxides in the air pollutants of thermal power plants. Therefore, starting from 2012, it is imperative to start the national denitrification market. [0003] In domestic and foreign thermal power plant boilers and other power boiler flue gas denitrification systems, more than 90% use the selective catalytic reduction method, that is, the SCR method. The flue gas denitrification catalyst used is a honeycomb type, plate type, and corrugated plate type solid with catalytic activity, which are vertically covered...

AI Technical Summary

Problems solved by technology

Its shortcomings are: 1. The catalyst module is removed from the flue before regeneration and hoisted to the ground. After regeneration, it is hoisted into the flue and then installed and restored. The amount of work is huge; 2. Due to the limited capacity of the regeneration device, only A single module is regenerated one by one. Each module needs to be hoisted into and out of five pools to complete the entire regeneration process. The process switching of each module requires a lot of cumbersome valve operations; 3. The catalyst has limited strength and is easily broken after frequent handling, resulting in smoke after being put into operation. The air resistance is large or even unable to run; 4. The consumption of regenerative medicine is large, the regeneration cost is high, and the entire regeneration period is long, which cannot meet the requirements of timely commissioning of the boiler

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