Method for cooperating flue gas desulfurization with denitrification to obtain byproduct hydroxylamine sulfate

Abstract

The invention provides a method for cooperating flue gas desulfurization with denitrification to obtain a byproduct hydroxylamine sulfate. The method comprises the following steps: step 1, a desulfurization section: enabling flue gas to enter a desulfurization device and carrying out circulating spraying on the flue gas by using circulating liquid to remove SO2, wherein the circulating liquid is adesulfurization agent ammonium sulfite solution; removing a main component SO2 in the flue gas, and after absorbing the SO2, the ammonium sulfite is converted into ammonium bisulfite; step 2, an oxidization absorption section; step 3, a synthesis section; step 4, a solid hydroxylamine sulfate preparation section: concentrating a hydroxylamine sulfate-containing solution obtained by the synthesissection, and treating by utilizing a dilution method to obtain solid hydroxylamine sulfate; step 4, a recirculating phase: mixing a dilution mother solution treated by step 4, an NaOH solution, an NOabsorption accelerant and hydrogen peroxide according to a ratio to obtain a compound absorbent; enabling the compound absorbent to enter the oxidization absorption section to realize recirculating utilization of the dilution mother solution. The method provided by the invention has the characteristics of safety, applicability and the like, has very good popularization and practical value, and hasgood economic benefit after being widely popularized and applied.

Description

technical field [0001] The invention relates to the fields of gas purification technology and fine chemical products manufacturing, in particular to a method for flue gas desulfurization and denitrification by-product hydroxylamine sulfate. Background technique [0002] Sulfur dioxide (SO 2 ) and nitrogen oxides (NO X ) emissions seriously affect the natural environment. Industrial waste gases such as power plants, cement, metallurgy, and iron and steel must be treated through purification processes to reduce the concentration of pollutant emissions. With the gradual deepening of the industrialization process, the amount of exhaust gas emissions and the total amount of pollutants have gradually increased. Due to the increase in the total amount, the control of the concentration of pollutants has gradually become stricter. The air pollutants contained in coal combustion flue gas mainly include soot, NOx, SOx and mercury compounds. The country pays more and more attention ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for flue gas desulfurization and denitrification by-product hydroxylamine sulfate, to solve the technical problem that the prior art cannot meet the production demand; and to solve the problem of low efficiency and waste of manpower and material resources in the prior art

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