A desulfurization synergist for wet flue gas desulfurization systems in thermal power plants

Abstract

The invention discloses a desulphurization synergist for a wet-method smoke desulphurization system used for a fire plant. The desulphurization synergist consists of the following ingredients: an interface active agent, a cosolvent, a pH buffer agent and an oxidation catalyst, wherein the preferable weight percent of each ingredient is as follows: 40 to 60 percent of interface active agent, 20 to 40 percent of cosolvent, 5 to 15 percent of pH buffer agent and 2 to 5 percent of oxidized catalyst. The desulphurization synergist is added into a calcium absorption agent, and the application concentration is 150mg / L to 600mg / L. By adopting the desulphurization synergist, the solubility equilibrium of calcium absorption agent can be promoted to move towards a positive direction, and the solubility of the calcium can be improved; the pH of a gas-liquid interface is stabilized, and the dissolving speed of sulfur dioxide is increased; the oxidation speed is increased, and the generation of gypsum is accelerated; the circulation amount of absorption slurry is reduced, the consumption of the absorption slurry is reduced, an energy-saving and consumption-reducing purpose is achieved, the cost is reduced, and benefit increasing can be achieved.

Description

technical field [0001] The invention relates to an auxiliary agent for improving the efficiency of limestone-gypsum wet desulfurization, in particular to a desulfurization synergist used in a limestone-gypsum wet flue gas desulfurization system of a thermal power plant. Background technique [0002] my country is a large coal producing country, and the energy structure determines that my country's market structure is dominated by thermal power generation. Taking 2014 as an example, my country's coal production reached 3.87 billion tons, nearly half of the world's output; in the same year, my country's thermal power generation was 398 billion kWh, accounting for more than 70% of the country's coal consumption, and it is the main source of air pollution. Among them, the emission of sulfur dioxide in flue gas accounts for more than 90% of the total emission of sulfur dioxide in the country, and the total emission in 2014 reached 19.744 million tons. [0003] Sulfur dioxide is ...

AI Technical Summary

Problems solved by technology

[0003] Sulfur dioxide is extremely harmful to the environment, causing acid rain and acid fog, corrosive to the environment, and carcinogenic to the human body

[0008] However, for the sulfur dioxide limit value after the standard was raised again in 2014, the existing chemicals are difficult to meet the needs of manufacturers, and more efficient desulfurization additives are needed to solve the problem of sulfur dioxide emissions

Images