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 on-line real-time purging device of an SCR denitration catalyst. The on-line real-time purging device of the SCRdenitration catalyst provided by the invention comprises a plurality of headers in one-to-one correspondence with a plurality of catalyst beds in an SCR denitration reactor, and the plurality of headers are positioned outside the SCR denitration reactor; the plurality of headers communicate with an outlet of a preheating device in the SCR denitration reactor; an inlet of the preheating device communicates with a dehumidifier; the dehumidifier communicates with a compressed air tank; the compressed air tank communicates with an air source; the headers communicate with a plurality of purging pipes parallelly arranged in front of the corresponding catalyst beds; the plurality of headers supply heated compressed air into the purging pipes; and the purging pipes purge the catalyst beds. According to the on-line real-time purging device, investment cost is reduced, the floor space of the device is decreased, purging is carried out through dehumidified compressed air, the purging manner is intelligent, operation is simple, and operation and maintenance cost is reduced.

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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