On-line real-time purging device of SCR denitration catalyst

Abstract

The invention belongs to the technical field of flue gas purification, and provides an online real-time purging device for an SCR denitrification catalyst. The proposed online real-time purging device for SCR denitrification catalyst has multiple headers corresponding to the multi-layer catalyst beds in the SCR denitrification reactor; multiple headers are located outside the SCR denitrification reactor; It is connected with the outlet of the preheating device in the SCR denitrification reactor; the inlet of the preheating device is connected with the dehumidifier; the dehumidifier is connected with the compressed air tank; the compressed air tank is connected with the gas source; Multiple purge pipes before the catalyst bed are connected; multiple headers send heated compressed air into the purge pipe to purge the catalyst bed. The invention saves the investment cost and the space occupied by the equipment, uses the dehumidified compressed air to blow the soot, the soot blowing mode is intelligent, the operation is simple, and the operation and maintenance costs are saved.

Description

technical field [0001] The invention belongs to the technical field of flue gas purification, and in particular relates to an online real-time purging device for an SCR denitration catalyst. Background technique [0002] SCR denitrification is currently the best denitrification process for stationary source NOx treatment. Traditional SCR denitrification catalyst soot blowing technologies include: steam soot blowing, sonic soot blowing, and compressed air rake soot blowing. Engineering practice has proved that steam soot blowers increase flue gas humidity, accelerate catalyst deactivation, and affect catalyst service life; sonic soot blowers have low soot blowing strength and have little effect on slagging and viscous ash deposits, so they are not suitable Sootblowing of catalysts with small and medium pore diameters, and the use effect is unstable, and the noise of the sonic sootblower is large, and the infrasonic wave of a specific frequency is harmful to the human body, ca...

AI Technical Summary

Problems solved by technology

Engineering practice has proved that steam soot blowers increase flue gas humidity, accelerate catalyst deactivation, and affect catalyst service life; sonic soot blowers have low soot blowing strength and have little effect on slagging and viscous ash deposits, so they are not suitable Sootblowing of catalysts with small and medium pore diameters, and the use effect is unstable, and the noise of the sonic sootblower is large, and the infrasonic wave of a specific frequency is harmful to the human body, causing secondary environmental pollution; The construction or renovation of the protective fence has a large amount of work, and the structure of the device inside the reactor is complex, easy to wear and accumulate dust, and needs to be checked and cleaned regularly, with high failure rate and high maintenance cost

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