An online regeneration device and method for a denitrification catalyst

Abstract

The invention relates to an on-line regeneration device and method of a denitration catalyst. At present, it is usually operated offline, which requires a lot of human, material and financial resources. The device of the invention includes a denitration device and a rake-type steam sootblower, and is characterized in that it also includes an ultrasonic transmitter, a pressure sensor, an ultrasonic generator and a central control system, and the ultrasonic transmitter and the pressure sensor are both fixed on the rake-type steam sootblower. on the steam branch of the appliance. The method of the invention is as follows: if the difference between the pressure parameters of the upper and lower layers in the denitration device is relatively large, the rake steam sootblower is not significantly improved before and after the operation, and the denitration effect of the denitration device is reduced to some extent, then the denitration catalyst is blocked. , deactivate, turn on the ultrasonic system, and regenerate the denitration catalyst online until the regeneration effect meets the requirements. The invention has the advantages of simple structure, reasonable design, low cost, energy saving and consumption reduction.

Description

technical field [0001] The invention relates to an online regeneration device and method for a denitrification catalyst, belonging to the technical field of air pollution control. Background technique [0002] With the increasingly stringent national environmental protection policies, domestic thermal power units in service and new thermal power units are equipped or plan to be equipped with denitrification devices to ensure that the boiler NO X Discharge. At present, most of the denitrification devices installed in active thermal power units at home and abroad adopt the SCR process, which requires the use of denitrification catalysts. However, the activity of the catalysts gradually decreases during operation. Increasing, more and more deactivated catalyst will be produced, requiring catalyst replacement. For the replaced catalyst, determine the cause of catalyst deactivation and determine whether there is a possibility of regeneration of the deactivated catalyst by testi...

AI Technical Summary

Problems solved by technology

However, the processes and devices of the existing denitration catalyst on-line regeneration technology are relatively complicated, the cost is high, and the regeneration effect of the denitration catalyst is poor.

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