Apparatus and method for removing fine particles from gases

Abstract

The invention discloses a device and a method for removing fine particles from gas. The device for removing the fine particles from the gas is characterized by comprising a dust bearing wastewater area, a preliminary steam phase change area, a multiphase spraying phase change and disturbance mass transfer dedusting area and a demisting area sequentially from the bottom up, wherein a demister is arranged in the demisting area; the multiphase spraying phase change and disturbance mass transfer dedusting area is provided with a multiphase nozzle; an air inlet end of the multiphase nozzle is connected with a high pressure air line; a water inlet end of the multiphase nozzle is connected with a water pipe; and a steam inlet end of the multiphase nozzle is connected with a first steam line. The method for removing the fine particles from the gas is characterized by comprising the following steps: A, fabricating a separation device which comprises the dust bearing wastewater area, the preliminary steam phase change area, the multiphase spraying phase change and disturbance mass transfer dedusting area and the demisting area sequentially from the bottom up. The device and the method achieve removal of the fine particles from the gas by a steam phase change principle and spray combined manner.

Description

technical field [0001] The invention relates to gas treatment, in particular to a device and method for removing fine particles from gas. Background technique [0002] In recent years, large-scale smog has broken out in my country, and most parts of the north will be shrouded in long-term, large-scale smog in winter. Severe air pollution poses a great threat to people's health. Academician Chen Zhu of the Chinese Academy of Sciences proposed in The Lancet that 500,000 to 1.3 million people die prematurely every year in China due to outdoor air pollution. Smog is one of the main pollutants in the atmosphere, and the main culprits of smog are fine particles and aerosols in the air. In order to be able to control the content of fine particles in the air, it is necessary to control from the source of fine particle emissions. The fine particles produced by coal burning are the main source of fine particles in the atmosphere, and because they contain many elements harmful to the...

AI Technical Summary

Problems solved by technology

Because the current dust collector has a high removal efficiency for large particles, but the effect on small particles such as PM2.5 is not ideal

In order to make up for the shortcomings of traditional dust collectors that do not efficiently deal with fine particles, the steam phase change technology is used to increase the particle size of fine particles to facilitate dust removal

However, this technology still has many limitations. In order to achieve the condition of water vapor phase transition, a certain degree of supersaturation is required, and the existing devices still cannot efficiently remove fine particles.

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