Desulfurization synergist for wet flue gas desulfurization

Abstract

The invention relates to a desulfurization synergistic agent for wet process smoke gas desulfurization. The desulfurization synergistic agent is prepared from the following raw materials in percentageby weight: 54 to 65 percent of glucan sodium bisulfate, 5 to 9 percent of disodium monolauryl sulfosuccinate, 7 to 12 percent of polyvinyl alcohol, 12 to 16 percent of citric acid, 2 to 5 percent ofsodium carboxymethylcellulose and 1 to 4 percent of phenol red sodium salt. The desulfurization synergistic agent provided by the invention has the higher desulfurization efficiency; the SO2 dischargecan be effectively reduced; corrosion cannot be caused on steel materials, lining glue and the like of an original system; secondary pollution does not exist.

Description

technical field [0001] The invention relates to a desulfurization synergist for wet flue gas desulfurization. Background technique [0002] The most commonly used method for flue gas desulfurization in domestic power plants is the "limestone-gypsum" wet coal-fired boiler flue gas desulfurization (FGD) process. Due to its large flue gas treatment per unit time and no secondary pollution, the process is mature and the source of desulfurization agent is abundant. And the price is low, it has become the preferred desulfurization process of coal-fired power plants in my country. More than 90% of the desulfurization systems of coal-fired power plants in my country adopt the "limestone-gypsum" wet coal-fired boiler flue gas desulfurization (FGD) process. In recent years, with the continuous improvement of national air emission requirements for coal-fired thermal power enterprises, the desulfurization efficiency and SO 2 The emission of SO2 has become an important assessment index f...

AI Technical Summary

Problems solved by technology

This kind of auxiliary material has a certain effect in temporary emergency use, but long-term use has serious hazards: (1) It belongs to the type of chemical reaction consumption, the duration of efficiency increase is short, and the efficiency decays quickly, which cannot meet the long-term requirements of power plants for environmental protection; ( 2) Its strong acidity is corrosive to local equipment of the desulfurization system, and may also cause "poisoning" of the slurry; (3) "Aerosol" is easy to be generated, which can block the demister, pipe and nozzle of the desulfurization system; (4) Some products have a strong smell, causing personal injury and polluting the air; (5) Some products have a single function and cannot solve the requirements of poisoning, scaling, corrosion, blockage and energy consumption reduction at the same time; (6) Because of their pH, they are relatively acidic , so not only cannot protect the original desulfurization system, but also accelerates the aging speed of the system due to corrosion, which virtually increases the cost of the power plant