High-efficiency flow mixer for front flue of SCR denitration device

Abstract

The invention relates to a high-efficiency flow mixer for a front flue of an SCR denitration device. The high-efficiency flow mixer comprises a plurality of circular steel pieces and connecting rods, wherein the circular steel pieces are welded and fixed inside a flue wall through the connecting rods; the diameter D of each circular steel piece is 1 / 10 to 1 / 9 of the length L of a long side of a cross section of the flue; the thickness of each circular steel piece is 6-10mm; the number n of the circular steel pieces is related to the long-width ratio L / S of the cross section of the flue; when the long-width ratio L / S is within 1-1.5 and is within 4.5, the number of the circular steel pieces is 16; when the long-width ratio L / S is within 1.5-2.3 and 3.5-4.5, the number of the circular steel pieces is 12; when the long-width ratio L / S is within 2.3-3, the number of the circular steel pieces is 8; when the long-width ratio L / S is within 3-3.5, the number of the circular steel pieces is 10. The high-efficiency flow mixer has the beneficial effects that flow can be mixed efficiently, the flow field uniformity can be improved, and the denitration efficiency can be improved; the high-efficiency flow mixer is convenient to mount and light in weight.

Description

technical field [0001] The invention relates to a high-efficiency flow mixer, in particular to a high-efficiency flow mixer used for the front flue of an SCR denitrification device. Background technique [0002] In the SCR denitrification device, the reducing agent is uniformly mixed with the nitrogen oxides in the flue gas through the ammonia injection grid, and reacts in the catalyst bed of the reactor to remove the nitrogen oxides. In order for the SCR system to efficiently remove nitrogen oxides under the premise of ensuring the loss of system resistance, it is necessary to ensure that the uniformity of the flue gas flow field and the uniformity of the ammonia nitrogen ratio (NH3 / NOx) entering the catalyst bed of the reactor are within a certain range. , and the better its uniformity, the better the denitrification effect. [0003] In many renovation projects, due to space constraints, there are often many irregular-shaped parts in the front flue of the SCR denitrificat...

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Problems solved by technology

[0003] In many renovation projects, due to space constraints, there are often many irregular-shaped parts in the front flue of the SCR denitrification device, which makes the uniformity of the flue gas flow field entering the catalyst bed of the reactor poor, resulting in a decrease in denitrification efficiency

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