A device for promoting the agglomeration of ultrafine particles in coal-fired flue gas

Abstract

The invention discloses a device for promoting the agglomeration of ultra-fine particles in coal-burning flue gas. Through the agglomeration pipeline, a protrusion with a specific structure and a nozzle at a specific position are arranged in the agglomeration pipeline to change the movement of the airflow in the agglomeration pipeline and couple the chemical agglomeration The effect of agglomeration and turbulent flow prolongs the residence time of particles in the airflow in the agglomeration pipe, and increases the probability of collision. Chemical agglomeration and turbulent agglomeration promote each other and form a positive impact. The agglomeration effect is double improved, and the agglomeration of ultrafine particles is effectively promoted.

Description

technical field [0001] The invention belongs to the technical field of separation, and in particular relates to an auxiliary treatment device for separating ultrafine particles from coal-fired flue gas. Background technique [0002] Coal, as the main source of primary energy consumption in China, not only provides strong support for China's energy industry and economic and social development, but also has a serious impact on China's environment and brings great pressure to China's environmental governance. Among them, coal combustion products It is one of the main sources of air pollution in my country. The pollutants produced by coal combustion will not only cause serious pollution and damage to the atmospheric environment and ecological environment, but also have a great impact and harm on human health, and even life-threatening in severe cases. To this end, the National Development and Reform Commission and the Ministry of Environmental Protection issued a document requir...

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Problems solved by technology

[0005] At present, most of the particle chemical agglomeration devices in the prior art directly use nozzles to spray the agglomeration accelerator into the flue, and the flue has not been improved. However, studies have shown that when the size of water mist particles is similar to that of dust particles, the probability of adsorption, filtration, and condensation However, the atomization fineness of general nozzles cannot directly meet this requirement. Therefore, the degree of atomization of the agglomeration liquid is low, and the agglomeration effect is general. The residence time in the flue is short, and it is difficult to fully ensure the complete evaporation of the agglomerating agent droplets before entering the electrostatic precipitator, which will affect the normal operation performance of the electrostatic precipitator

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