Catalyst in-situ regeneration device and method of using the same

Abstract

A catalyst in-situ regeneration device and a method of using the same are disclosed, The catalyst is arranged in a denitrification reactor, a first flue gas baffle door is arranged on the inlet flue between the bypass flue and the inlet of the denitrification reactor, a second flue gas baffle door is arranged on the outlet flue between the bypass flue and the outlet of the denitrification reactor,and a third flue gas baffle door is arranged on the bypass flue. One end of a regenerative air duct is connected to the inlet flue between the first flue gas baffle door and the inlet of the denitrification reactor, one end of the regenerative air duct is connected to the outlet flue between the second flue gas baffle door and the outlet of the denitrification reactor, and a regenerative fan anda regenerative wind power heater are arranged on the regenerative air duct in sequence; a regenerative exhaust gas exhaust system is connected to the regenerative air duct of the regenerative fan andthe regenerative wind power heater. The chemical life of SCR catalyst is prolonged, the SCR catalyst is regenerated by hot air in situ, and ammonia bisulfate on the surface of the catalyst is decomposed by at elevated temperature to restore the activity of the catalyst.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification treatment, in particular to a catalyst in-situ regeneration device and a use method thereof. Background technique [0002] Selective catalytic reduction denitrification technology (SCR) is one of the main methods for post-furnace denitrification treatment of nitrogen oxides in flue gas, and it is also one of the most mature flue gas denitrification technologies at present. The principle of the Selective Catalytic Reduction (SCR) process is that under the action of a catalyst, NH 3 (reducing agent) reacts with nitrogen oxides in flue gas to generate harmless nitrogen and water, thereby removing NOx in flue gas. [0003] The core of selective catalytic reduction denitrification technology (SCR) is a catalytic reaction system, which requires the use of a catalyst, and under the action of the catalyst and the presence of oxygen, NH 3 (Reducing agent) preferentially undergoes reducti...

AI Technical Summary

Problems solved by technology

[0007] 1. When the activity of the catalyst is reduced to the point where the denitrification performance cannot be met, the catalyst will be replaced as a whole and cannot be regenerated in time during use;

[0008] 2. It is necessary to remove the invalid catalyst and replace it with a new catalyst, which requires a large amount of work and takes a long time;

[0009] 3. In the process of replacing the catalyst, it is necessary to stop the operation of the denitrification system, which has a great impact on the operation of the boiler;

[0010] 4. The invalid catalyst needs to be sorted according to the structural integrity, activity and other indicators, and the reuse rate of the catalyst is low

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