Soot blowing system for denitrification reactor

Abstract

The invention discloses a soot blowing system of a denitrification reactor. A catalyst layer is arranged in the denitrification reactor; the soot blowing system comprises a soot blower, a compressed air supply device and a plasma reaction device, wherein the soot blower is positioned in the denitrification reactor; the soot blower is provided with at least one spray nozzle device; the compressed air supply device is connected with the soot blower through a compressed air pipeline which is provided with a first valve; the plasma reaction device is connected with the soot blower through a plasma pipeline which is provided with a second valve; the compressed air supply device is used for conveying compressed air to the soot blower through the compressed air pipeline for blowing the catalyst layer; and the plasma reacting device is used for conveying plasmas to the soot blower for blowing and regenerating the catalyst layer. The soot blower is separately connected with the compressed air supply device and the plasma reaction device, so that the catalyst can be blown and regenerated, and therefore, the catalytic efficiency of the catalyst is improved, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention relates to the technical field of waste gas denitrification, in particular to a soot blowing system of a denitrification reactor. Background technique [0002] According to the requirements of the amendments to the "Regulations for the Prevention of Air Pollution Caused by Ships" in Annex VI of the "MARPOL 73 / 78 Convention" adopted by the International Maritime Organization (IMO), exhaust gases from ships must meet the emission requirements before they can be discharged. Therefore, marine diesel engines need to be equipped with a marine exhaust gas denitrification system, and Selective Catalytic Reduction (SCR) technology is currently the most applicable exhaust gas denitrification technology. [0003] In the denitrification reactor of the denitrification system, ammonia escape and SO in the exhaust gas 3 The generated ammonium bisulfate (ABS) will stick to the surface of the catalyst layer as the temperature in the reactor decreases, bl...

AI Technical Summary

Problems solved by technology

However, engineering practice has proved that the soot blowing strength of the sonic soot blower is not high, and it has little effect on the slagging and viscous soot accumulation. It is not suitable for soot blowing of small and medium-sized pore catalysts, and the use effect is unstable

The steam soot blower increases the humidity of the flue gas, which is more likely to cause the deposition and attachment of soot, and it is easy to accelerate the deactivation of the catalyst, which affects the service life of the catalyst

The compressed air soot blower can only clean the ash on the surface of the catalyst, but for the soot particles attached to the incompletely burned heavy oil and ammonium bisulfate with high viscosity, simply using compressed air soot blowing cannot Completely solve the problem of blockage of catalyst surface and pores

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