Y-shaped SCR system catalyst online continuous regenerating device

Abstract

The invention provides a Y-shaped SCR system catalyst online continuous regenerating device. The Y-shaped SCR system catalyst online continuous regenerating device comprises one first SCR reactor and one second SCR reactor, one smoke inlet pipeline, one flue switching structure provided with one first station and one second station, a first catalyst regeneration system connected with the first SCR reactor and a second catalyst regeneration system connected with the second SCR reactor, wherein the smoke inlet pipeline is communicated with the first SCR reactor when the flue switching structure is at the first station, and the smoke inlet pipeline is communicated with the second SCR reactor when the flue switching structure is at the second station. The Y-shaped SCR system catalyst online continuous regenerating device provided by the invention has the advantages that online regeneration of a denitration catalyst can be realized without halting a machine set, forced halt of the machine set due to SCR catalyst activity decrease is reduced, and economic security and operation level of the machine set are improved, so that operation cost of an SCR system is saved.

Description

technical field [0001] The invention relates to the technical field of air pollutant control of coal-fired boilers, in particular to SCR denitrification reaction equipment, and in particular to a Y-type SCR system catalyst online continuous regeneration device. Background technique [0002] During the 13th Five-Year Plan period, the denitrification and ultra-low emission transformation of coal-fired power stations has become a key NO x One of the important technical measures for gas emission reduction. In my country, the mainstream process of denitrification technology in power stations is Selective Catalytic Reduction (Selective Catalytic Reduction, SCR). Selective Catalytic Reduction refers to the use of reducing agents (such as NH 3 , liquid ammonia, urea) to "selectively" interact with NO in the flue gas x React and generate non-toxic and non-polluting N 2 and H 2 O. [0003] SCR denitrification technology for boiler flue gas NO x The control effect is very signifi...

AI Technical Summary

Problems solved by technology

Therefore, SCR denitration technology is widely used in domestic coal-fired power plants. It is worth noting that its denitration performance largely depends on the activity of the SCR catalyst. When the catalyst activity decreases, the unit cannot be guaranteed to operate according to the designed denitration efficiency. , at this time, it must be forced to shut down for temporary replacement and off-line regeneration of the catalyst module, which has a negative impact on the economic operation of the unit

[0004] In addition, the catalyst replaced by the SCR system can only be hoisted and transported to a professional catalyst regeneration plant for regeneration. The cost of replacement and operation is very high, which further reduces the economic performance of the SCR system.

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