Mesh plate for boiler denitration elution tower and boiler denitration elution tower

Abstract

The invention relates to the field of boiler flue gas treatment, in particular to a mesh plate for a boiler denitration elution tower and the boiler denitration elution tower. The mesh plate for the boiler denitration elution tower comprises mesh plates with a plurality of holes, the holes are divided into upper holes and lower holes which are communicated with each other, and the diameter of the upper surfaces of the upper holes is larger than that of the lower holes. The plurality of layers of mesh plates with a plurality of holes are arranged, so that liquid and gas are uniformly distributed in the elution tower, spray water and flue gas easily form bubbles, the flue gas and the spray water are uniformly mixed due to bubble breakage, the SO2 and NaOH are ensured to be in 100% contact at a molecular level, and high-valence nitrogen oxide is ensured to be in 100% contact with alkaline water molecules; and desulfurization and denitrification can be more thoroughly removed.

Description

technical field [0001] The invention relates to the field of boiler flue gas treatment, that is, a mesh plate for various elution towers (including desulfurization towers, denitrification towers, etc.) of boilers. for SO 2 The elution after reaction with alkaline substances is also suitable for ozone denitrification elution. Background technique [0002] According to Zhou Xiaomeng's "Flue Gas Desulfurization and Denitrification Process Manual" on page 31, the American B&M Company invented an "alloy tray" technology, which is to install an "alloy tray" under the limestone spray in the desulfurization tower. A 30mm hole is opened on the pallet, and the opening rate is 30-50%. The flue gas passes through the tray evenly under the tray, ensuring that the SO2 in the flue gas is in contact with the eluent evenly, and a certain removal rate of SO2 is achieved. [0003] Since the opening diameter of the "alloy tray" is 30mm, air bubbles will only be generated when the ratio of el...

AI Technical Summary

Problems solved by technology

In fact, it is far from enough to rely on spraying and elution. Under the impact of exhaust gas at a speed of at least two to three meters per second or even faster, the spray water curtain will roll up and deform, and it is impossible to be intact. contact with water curtain

This is one of the reasons why the current desulfurization tower cannot achieve zero emission of SO2

There are also designs in China that combine the spray method and the orifice plate method, but they are all sprayed on one layer and one layer of orifice plate in a cross layout, and the effect is not obvious.

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