On-line power plant SCR (Selective Catalytic Reduction) denitration system catalyst activity monitoring method

Abstract

The invention belongs to the technical field of fume tail denitration by using a selective catalytic reduction method in a power plant, and particularly relates to an on-line power plant SCR (Selective Catalytic Reduction) denitration system catalyst activity monitoring method which mainly comprises the following steps: 1, obtaining a laboratory to perform activity detection on fresh catalysts of the same specification, so as to obtain the activity of the fresh catalysts that alpha0 is equal to 1, wherein an optimal denitration efficiency which can be achieved through the fresh catalysts is eta0; 2, in practical operation of a machine set, on-site property testing is performed to an SCR denitration system so as to obtain SCR practical operation data and property parameters; 3, calculating the real activity of the present catalysts by using the SCR catalyst activity modifying method provided by the invention. The invention aims to provide the on-line SCR denitrition system catalyst activity modification calculation method, the problem that the calculated activity is deviated from an actual value because of laboratory sampling representativeness problems and over-ideal reaction condition is solved, and the accuracy and the real-time capability in catalyst activity detection are improved.

Description

technical field [0001] The invention belongs to the technical field of flue gas tail denitrification by selective catalytic reduction in power plants, and in particular relates to an online monitoring method for catalyst activity in an SCR denitrification system of a power plant. Background technique [0002] Selective Catalytic Reduction (SCR) is a widely used denitrification technology in power plants. In the SCR denitrification device, the denitrification catalyst is the most critical and important component in the SCR flue gas denitrification system, and the catalyst generally accounts for 30% to 50% of the total cost of the denitrification device. Its activity and service life directly affect the operating cost of the denitrification system and the performance of the denitrification system. Therefore, the service life of the SCR catalyst is valued by the power plant managers. Effectively monitor the performance of the catalyst, adjust the operation early, optimize the ...

AI Technical Summary

Problems solved by technology

In power plants, the time interval for catalyst inspection is generally one year, which is too long, which is not conducive to the operator's timely understanding of changes in catalyst activity, and is not conducive to the efficient operation of the denitrification system

[0004] The patent "A Correction Method for Catalyst Activity in SCR Denitrification System of Power Plant" proposes a catalyst activity correction method, which corrects the apparent activity of the catalyst (in Nm / h), that is, corrects the activity coefficient of the catalyst. The activity coefficient is a quantity with units, which is not convenient for the operator to intuitively judge the performance of the catalyst

Moreover, the size of the catalyst activity coefficient does not directly reflect the catalyst performance.

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