Coal-fired flue gas desulfurization, denitrification and foam inhibition catalytic synergist and use method thereof

Abstract

The invention discloses a coal-fired flue gas desulfurization, denitrification and foam inhibition catalytic synergist and a use method thereof. The catalytic synergist comprises the following raw materials in percentage by mass: 10-80% of a cosolvent; 5-40% of an oxidation catalyst; 5-30% of a co-activator; 1-10% of a scale and foam inhibitor; 1-10% of a co-dispersant; and 0.1-2% of an analysis regulator. With the coal-fired flue gas desulfurization, denitrification and foam inhibition catalytic synergist is adopted, desulfurization and denitrification efficiency can be improved; the semi-ablation time of limestone is reduced; the dissolution speed of the limestone is obviously accelerated; the activity of limestone can be greatly improved; the fluctuation of the PH value of slurry is mitigated; the liquid-gas ratio L/G of a system is reduced; the resistance of a spraying layer is reduced; the utilization efficiency of oxidation air is improved; the consumption of a booster fan is reduced; the Ca/L ratio of the system is reduced; the consumption of the limestone is reduced; the dispersity of the limestone is improved; calcium sulfite oxidation is promoted; scaling blockage and foaming of a desulfurization system are reduced; and the reliability of the desulfurization system is improved.

Description

technical field [0001] The invention relates to the technical field of desulfurization and denitrification of coal-fired flue gas, in particular to a catalytic synergist for desulfurization and denitrification of coal-fired flue gas and a use method thereof. Background technique [0002] The boiler flue gas has the largest content of soot and sulfur dioxide, followed by carbon monoxide, hydrocarbons, nitric oxide and photochemical smog. Most of these pollutions come from various industrial boilers, power plant boilers and civil boilers that burn coal. The sulfur content in coal is generally 0.5%-4%, and some are as high as 8%. When coal is burned, sulfur in coal reacts with oxygen to produce sulfur dioxide gas. When the concentration of sulfur dioxide in the air is greater than 0.1ppm, it will damage or corrode plants and equipment. In addition, hydrocarbons such as nitric oxide and methane in the flue gas are irradiated by ultraviolet rays in the sun to produce light blue...

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Problems solved by technology

[0003] Therefore, in order to protect the environment and make the flue gas discharge meet the emission standards, it is necessary to desulfurize and denitrify the boiler flue gas. In the prior art, when the magnesium method and the limestone gypsum wet desulfurization system are used for desulfurization and denitrification, a large amount of limestone is often consumed , the overall desulfurization and denitrification efficiency is not high, and the desulfurization system is also prone to fouling, blockage and air bubbles during the desulfurization and denitrification process, which reduces the reliability of the desulfurization system