Device and method for on-line regeneration of low-temperature denitrification catalyst in rotary fixed bed

Abstract

The invention discloses a device for regenerating a low-temperature denitrification catalyst on-line with a rotary fixed bed, which comprises a fixed bed reactor, an upper end cover, a lower end cover, four intake pipes, four exhaust pipes, a drive shaft, a first sealing member, a support frame, motor, coupling, frame and second seal; four partitions divide the internal space of the fixed bed reactor into four independent reaction zones; the four reaction zones are the removal zone and the first transition zone in turn , the regeneration zone and the second transition zone; four intake pipes are arranged on the lower end cover, four exhaust pipes are arranged on the upper end cover, and each reaction zone corresponds to an intake pipe and an exhaust pipe respectively. The device can continuously regenerate the low-temperature denitrification catalyst on-line, and also provides an online regeneration method using the device, which solves the problem that it is difficult to realize the on-line regeneration of the low-temperature denitrification catalyst in the current coal-fired flue gas denitrification process in the thermal power industry.

Description

technical field [0001] The invention relates to the field of preparation of low-temperature denitration catalysts, in particular to a device and method for on-line regeneration of low-temperature denitration catalysts in a rotary fixed bed. Background technique [0002] my country is the largest coal-consuming country in the world, and coal consumption accounts for about 76% of primary energy consumption. In the process of burning coal and other coal resources, a large amount of soot, sulfur dioxide, nitrogen oxides and other harmful substances will be produced. Among them, nitrogen oxides are one of the main harmful substances that pollute the atmosphere. Its types include: N 2 o 5 , N 2 o 4 , N 2 o 3 , N 2 o 2 , N 2 O, NO, NO 2 , collectively referred to as NOx. The world emits about 50 million tons of NOx into the atmosphere every year, of which about 60% comes from coal combustion flue gas. Coal combustion produces mainly NO and NO 2 , NO accounts for about...

AI Technical Summary

Problems solved by technology

[0005]Technical problem: The technical problem to be solved by the present invention is to provide a device for online regeneration of low-temperature denitrification catalyst in a rotary fixed bed, which can realize continuous regeneration of low-temperature denitrification catalyst on-line The denitrification catalyst also provides a method for online regeneration using the device, which solves the problem that the low-temperature denitrification catalyst is easily deactivated and difficult to achieve online regeneration during the denitrification process of coal-fired flue gas in the thermal power industry

Images