Synergist for assisting wet-process desulphurization of thermal power plant, and application method of synergist

Abstract

The invention discloses a synergist for assisting wet-process desulphurization of a thermal power plant. The synergist comprises the following components in percentage by mass: 55%-60% of organic acid, 15%-20% of organic acid salt, 10%-15% of oxidized catalyst, and 10%-15% of chelating dispersing agent. The acidity of the organic acid is stronger than that of carbonic acid and weaker than that of sulphurous acid, and the organic acid salt is used for providing organic acid groups. The synergist can reduce the surface tension between gas and liquid and improve the dispersion speed of gas to liquid; the concentration of calcium ions in the liquid solution can be increased, the crystallization speed of sulfate ions can be accelerated, and the desulfurization efficiency of the system and the utilization rate of lime stone can be improved; in addition, the characteristics of calcium sulfate crystals can be changed, so that muddy crystals can be produced, the crystals can be prevented from being deposited at parts, such as a spray nozzle.

Description

technical field [0001] The invention relates to the technical field of wet desulfurization, in particular to a synergist for assisting wet desulfurization in a thermal power plant and a use method thereof. Background technique [0002] With the continuous development of society, the electric power industry has entered a period of rapid development, and the ensuing coal-fired flue gas emissions from thermal power plants have become increasingly serious environmental pollution. To reduce and control the air pollution caused by coal-fired SO2 in thermal power plants, It is the primary task to be solved urgently in my country's current air pollution control. Limestone-gypsum wet flue gas desulfurization process technology is widely used in many thermal power plants because of its good adaptability to coal types, superior desulfurization efficiency and reliable operation system. [0003] In recent years, due to the great changes in coal quality in the coal market, the sulfur cont...

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Problems solved by technology

[0003] In recent years, due to the great changes in coal quality in the coal market, the sulfur content of coal fired into the furnace in many thermal power plants has far exceeded the design value, causing the long-term overload of the desulfurization system, resulting in a sharp drop in desulfurization rate and causing SO2 in the flue gas. At the same time, due to the long-term overload operation of the desulfurization system, the power consumption rate of the plant has also increased significantly