Ammonia desulfurization process and system

Abstract

The invention discloses an ammonia desulphurization process and an ammonia desulphurization system. The ammonia desulphurization process comprises the step of introducing flue gas into a desulphurization column for desulphurization through an ammonia method, wherein the flue gas is subjected to pre-cooling spraying in an inlet area of an absorption column in the desulphurization column, and a water source used in the pre-cooling spraying operation is preferably circulating water in a circulating tank of the desulphurization column. Through pre-cooling spraying operation in the inlet area of the absorption column, the situation that aerosol particles at a desulfurization outlet of an ammonia desulfurization process seriously exceed the standard is greatly relieved. According to the process,pre-cooling spraying is ingeniously carried out in the inlet area of the absorption column, the spraying water amount is controlled according to the inlet temperature and the slurry concentration ofthe absorption column, the effect is controllable, meanwhile, the transformation degree is small, the construction period is short, and cost is low.

Description

technical field [0001] The invention relates to the technical field of ammonia desulfurization, in particular to an ammonia desulfurization process and system. Background technique [0002] In recent years, with the rapid development of my country's industrialization and the large-scale use of coal fuel, the harmful gases such as sulfur dioxide emitted by people into the atmosphere have increased year by year. After sulfur dioxide enters the atmosphere, it can be enriched in local areas and form sulfuric acid and other acids in the process of water condensation. substances, and fall with the rain, thus forming acid rain. With the development of society and economy, my country's requirements for environmental protection are constantly increasing, and the government and the public are paying more and more attention to the reduction of sulfur dioxide. my country's desulfurization control of thermal power plants is also increasing, and flue gas desulfurization is progressing rap...

AI Technical Summary

Problems solved by technology

However, even with the above-mentioned structure of the absorption tower, the above-mentioned problems still exist periodically in actual operation, that is, when the absorption tower transports concentrated ammonium sulfate slurry to the urea production line, the concentration of aerosol particles at the outlet is significantly higher than the limit value of the specification

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