SO3 removal device in sintering flue gas ultra-low emission system

Abstract

The invention relates to the technical field of desulfurization equipment, and provides a SO3 removal device in a sintering flue gas ultra-low emission system, which comprises a removal tower, the bottom of the removal tower is used for containing alkaline slurry, the removal tower is provided with a flue gas inlet and a flue gas outlet, an absorption spraying layer is arranged in the removal tower, and the absorption spraying layer is communicated with the alkaline slurry through a circulating pump. The flue gas inlet is located between the liquid level of the alkaline slurry and the absorption spraying layer, the SO3 removal layer is arranged in the removal tower, is located above the absorption spraying layer and is located below the flue gas outlet, the SO3 removal layer comprises a pre-demisting layer, a filler layer, an ammonia water spraying layer and a tail end demisting layer which are sequentially arranged from bottom to top, the ammonia water spraying layer is communicated with an ammonia water storage tank through a delivery pump, and the tail end demisting layer is communicated with the tail end of the absorption spraying layer. After passing through the filler layer, the flue gas is in contact with the ammonia water sprayed by the ammonia water spraying layer. The filler layer is additionally arranged, so that the problem that the SO3 in the flue gas is not completely removed due to the fact that ammonia water and the flue gas cannot be fully contacted when the removal tower in the related technology is used is solved.

Description

technical field [0001] The invention relates to the technical field of desulfurization equipment, in particular, it relates to SO in sintering flue gas ultra-low emission system 3 Remove device. Background technique [0002] In the iron and steel production industry, the sintering process is usually used. Sintering refers to the transformation of powdery materials into dense bodies. It is a traditional process. People have long used this process to produce ceramics, powder metallurgy, refractory materials, super High-temperature materials, etc. Generally speaking, after the powder is formed, the dense body obtained by sintering is a polycrystalline material, and its microstructure is composed of crystals, glass bodies and pores. Generally, a large amount of flue gas will be generated during the sintering process, and the flue gas will contain certain harmful substances. When the flue gas is treated, the removal tower is usually used, but the existing removal tower has certa...

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Problems solved by technology

[0003] The present invention proposes SO in the sintering flue gas ultra-low emission system 3 The removal device solves the problem that the ammonia water and the flue gas cannot be fully contacted when the removal tower of the related technology is used, resulting in SO in the flue gas 3 remove imperfections

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