Absorbent for flue-gas pollutants and application thereof

Abstract

The invention provides an absorbent for flue-gas pollutants. The absorbent is prepared from a component A and a component B. Based on 100% of the total mass of the absorbent for the flue-gas pollutants, the component A is prepared from the following components in percentage by mass: 10-50% of strong oxidant, 1-10% of synergist and 1-10% of stabilizer; the component B is prepared from the followingcomponents in percentage by mass: 20-60% of neutral oxidant, 5-15% of corrosion inhibitor and 1-5% of alkali. Proved by experimental results, when the absorbent for the flue-gas pollutants provided by the invention is used for treating flue gas of two roller kilns of a ceramic factory with the total amount of flue gas is 100 thousand m<3> / h, the removal rates for SO2, NOx, heavy metals, hydrogenfluoride and hydrogen chloride are 98% or above, 70% or above, 90% or above, 90% or above and 90% or above respectively; the consumption amount of an agent is reduced to 1.1 ton / day; no corrosion of equipment pipelines is found in 1 year of engineering operation, and the problem of blockage of sprayer pipelines can also be avoided.

Description

technical field [0001] The invention relates to the technical field of air pollution control, in particular to a flue gas pollutant absorbent and its application. Background technique [0002] In recent years, my country's air pollution situation has become increasingly severe. The frequent haze and photochemical smog pollution incidents in economically developed regions such as the Beijing-Tianjin-Hebei region, the Yangtze River Delta, and the Pearl River Delta have seriously affected people's production and life, and have seriously damaged my country's international image. Negative impact. Studies have shown that the main culprits for the frequent occurrence of the above pollution events are PM2.5 and O in the atmosphere. 3 , while a small part of them come from the primary emissions of industrial production, and most of them come from particulate matter, SO 2 , NO x secondary synthesis of pollutants. Therefore, in order to effectively control haze and photochemical smo...

AI Technical Summary

Problems solved by technology

Through the use of the above absorbent SO 2 , NO x , mercury, etc., but on the one hand, due to the variety of pollutants in the flue gas and the large amount of additives used in the above-mentioned process, the operating cost is high; Potential safety hazards; if complex additives are used, ferrous iron in this type of additives is easily oxidized to ferric iron and fails, resulting in increased costs and reduced pollutant removal efficiency

In addition, the storage and use of the above-mentioned oxidized additives are difficult, which may easily cause safety hazards

Patent CN 201410033812.6 discloses a flue gas simultaneous desulfurization, denitrification and deVOCs absorbent and its preparation and application, with 5-10% ammonium salt, 0.01-0.50% surfactant, 1‰-2% complexing agent and water as the absorbent agents, implementations include SO 2 , NO x , VOCs and other pollutants are removed, but the complexing agent used in this technology is prone to failure, which increases the amount of chemicals used and the operating cost. x The removal efficiency is low, and it has almost no removal effect on heavy metals

[0005] It can be seen that the existing research and development technologies generally have problems such as low removal efficiency of various pollutants in flue gas, large consumption of chemicals, and serious corrosion of equipment.

Images