Judgment method and device of service life of catalysts of SCR (Selective Catalytic Reduction) denitration system

Abstract

The invention discloses a judgment method of the service life of catalysts of an SCR (Selective Catalytic Reduction) denitration system. The judgment method comprises the steps of step 1, calculating out the service life of the different positions and different types of SCRs of catalysts through a preset simulation computation formula based on different types of SCRs of various parameters provided by an expert database in the integral operation cycle and various thermodynamic parameters and chemical factors provided by a thermodynamics and chemistry calculation library and related to a flue and step 2, performing fitting operation through the denitration efficiency, the sulfur dioxide and sulfur dioxide conversion rate, the escape rate of the ammonia gas and the performance index parameters of the pressure drop and the calculated service life of the different positions and different types of SCRs of catalysts so as to verify the accuracy of a calculation result of the service life of the different positions and different types of SCRs of catalysts, wherein the denitration efficiency, the sulfur dioxide and sulfur dioxide conversion rate, the escape rate of the ammonia gas and the performance index parameters of the pressure drop are contained in laboratory simulation test data which are provided by the expert database and the catalyst activity of the different positions and different types of SCRs of catalysts is reflected by the denitration efficiency, the sulfur dioxide and sulfur dioxide conversion rate, the escape rate of the ammonia gas and the performance index parameters of the pressure drop.

Description

technical field [0001] The invention relates to the technical field of SCR denitrification systems, in particular to a method and device for judging the catalyst life of an SCR denitrification system. Background technique [0002] The principle of SCR (Selective Catalytic Reduction, selective catalytic reduction method) is that under the action of a catalyst, the reducing agent NH3 reduces NO and NO2 to N2 at 290-400 ° C, and almost no oxidation reaction of NH3 occurs, thereby increasing the N2 The selectivity reduces the consumption of NH3. [0003] With the wide application of SCR denitrification system in thermal power plants in my country, the problems of operation and management of SCR catalyst and denitrification system have become increasingly prominent. The removal of nitrogen oxides in coal-fired power plants generally adopts the selective SCR denitrification system. The chemical life of the catalyst used is basically designed for 24,000 hours. After 4 to 6 years o...

AI Technical Summary

Problems solved by technology

Since the temperature and flue gas atmosphere of the SCR in the flue are not uniform, it is very doubtful whether the obtained catalyst samples are representative, and the sampling test results are also inaccurate for judging the life of the entire SCR.

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