A fluidized bed activated carbon adsorption and denitrification method for low-sulfur flue gas

Abstract

A fluid bed activated carbon adsorption denitrification method for low-sulfur flue gas is carried out according to the following steps: (1) passing the low-sulfur flue gas into the fluid bed from the inlet of the fluid bed; (2) crushing the activated carbon into activated carbon powder; The powder spraying device sprays activated carbon powder into the fluidized bed, and the activated carbon powder and the low-sulfur flue gas are mixed in the fluidized bed and move to the outlet of the fluidized bed, and perform desulfurization and denitration; (3) Control the flow of the activated carbon powder and the low-sulfur flue gas The contact in the bed is 3 to 10s, the dust is adsorbed and collected in the bag filter; the low-sulfur flue gas is desulfurized, denitrified and dedusted to form purified flue gas and discharged. The method of the invention saves the energy consumption of denitration; the reactor can be very small, and the investment is reduced; the investment and consumption of the catalyst are not required; and the coordinated treatment of pollutants is realized.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy and environmental protection, and in particular relates to a fluidized-bed activated carbon adsorption and denitrification method for low-sulfur flue gas. Background technique

[0002] The current flue gas denitration methods include SCR, SNCR, moving bed activated carbon adsorption method and oxidation absorption method, and oxidation absorption is divided into dry absorption and wet absorption. SCR, SNCR, and moving bed activated carbon adsorption use ammonia to reduce the denitrification process. The production process of ammonia itself is high energy consumption and high pollution, and the pollutants produced are several times that of ammonia. Using it to denitrify the total amount of pollutants is not The reduction, but the increase, is just the variation and transfer of pollutants. The rationality of this treatment process is open to question; the recovery and treatment of denitrification...