Method and system for predicting service life of medium-low-temperature SCR denitration catalyst

Abstract

The invention provides a method and a system for predicting the service life of a medium-low temperature SCR denitration catalyst, which belong to the field of atmospheric pollutant denitration management and aim to solve the problems that the conventional method cannot perform online prediction, has certain limitation and is not suitable for the medium-low temperature SCR denitration catalyst. The method comprises the following steps of: acquiring environmental data of the denitration system under the current working condition, performing abnormal elimination processing on the environmental data of the denitration system under the current working condition, obtaining catalyst characteristic parameters of the medium-low temperature SCR denitration catalyst and writing the catalyst characteristic parameters into a medium-low temperature SCR denitration catalyst activity influence database, calculating the catalyst activity of each catalyst layer, the flue gas acid dew point temperatureunder the current working condition and the flue gas NH4HSO4 dew point temperature under the current working condition on the basis of the environmental data and the catalyst characteristic parametersafter abnormal elimination processing, and predicting the catalyst life of each catalyst layer according to the calculation result and the medium-low temperature SCR denitration catalyst activity influence database, and transmitting the prediction result to a display system of an enterprise for display.

Description

technical field [0001] The invention relates to the technical field of denitrification management of air pollutants, in particular to a method and system for predicting the life of a medium-low temperature SCR denitrification catalyst. Background technique [0002] With the rapid development of our country's economy, the energy consumption is increasing day by day, so the air pollution environmental problems caused by energy consumption are becoming more and more prominent, and are widely concerned by people. Air pollution has become one of the main environmental problems in our country. The main emission sources of air pollutants are the power industry and non-electric enterprises such as iron and steel plants and cement plants. NO x The mainstream technology for emission reduction is Selective Catalytic Reduction (SCR) technology, the core of which is SCR catalyst. The exhaust gas temperature of kilns or equipment in the field of non-power enterprises is mostly lower th...

AI Technical Summary

Problems solved by technology

The first method above has the disadvantage that the boiler must be shut down, and it cannot effectively analyze and predict the service life of the catalyst on-line.

The second method cannot effectively evaluate the catalytic activity deactivation of different catalyst layers in the reactor, and has great limitations

Chinese patent CN107103176A reports a method for evaluating the life of a coal-fired boiler SCR catalyst, and proposes a method for evaluating the life of a high-temperature SCR denitrification catalyst for coal-fired boiler flue gas. Due to the difference between the working conditions of the medium-low temperature SCR catalyst and the conventional high-temperature catalyst , the use environment of medium and low temperature SCR catalysts is more likely to lead to the loss of catalytic activity, so the method in this patent is not suitable for predicting the life of medium and low temperature SCR denitration catalysts

[0004] In summary, the current methods for predicting the service life of SCR denitration catalysts cannot effectively analyze and predict the service life of catalysts online, because they cannot effectively evaluate the different catalyst layers in the reactor. However, there are certain limitations due to the deactivation of catalytic activity, and it is not suitable for predicting the life of medium and low temperature SCR denitration catalysts.

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