Cyclonic and electrostatic coupling high-efficiency dust and mist removal apparatus and its application

Abstract

The invention relates to a cyclonic and electrostatic coupling high-efficiency dust and mist removal apparatus and its application. The apparatus includes a shell (1), a cyclonic and electrostatic dust and mist removal unit, a discharge electrode fixing plate (8), an ash washing water tube (9) and a high voltage direct current power supply (10), the cyclonic and electrostatic dust and mist removal unit is arranged in the shell (1), the discharge electrode fixing plate (8) is arranged above the cyclonic and electrostatic dust and mist removal unit, the ash washing water tube (9) is arranged above the discharge electrode fixing plate (8), and the high voltage direct current power supply (10) is connected with the cyclonic and electrostatic dust and mist removal unit. Compared with apparatuses in the prior art, the apparatus combining an inward injection plate, a bottom cyclone plate and a spraying technology substantially improves the purifying degree of flue gas.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a cyclone electrostatic coupling high-efficiency dust and mist removal device for flue gas purification and its application. Background technique [0002] In recent years, with the continuous development of the national economy, the problem of environmental pollution has intensified, especially the frequent occurrence of "smog", which has seriously affected the health of residents and the ecological environment. For this reason, the state has raised the smoke and dust emission standards for coal-fired, metallurgical and other industries, which puts forward higher requirements for flue gas purification. [0003] Fine particulate matter and SO in flue gas 3 Pollutants such as acid mist are one of the main causes of "smog". Traditional flue gas purification devices such as bag filters and electrostatic precipitators are still not ideal for removing such pollutants. Therefor...

AI Technical Summary

Problems solved by technology

However, the traditional wet electrostatic precipitator mainly has the following shortcomings: 1. Most of the electric field structure of the wet electrostatic precipitator still adopts the conventional flat electric field, which is prone to dead angles, which makes the gas distribution uneven, thereby reducing the dust removal efficiency; 2. Dust collection It is difficult to form a uniform water film on the board, and it is easy to form a local dry area on the dust collection board, resulting in local resistance, resulting in the generation of back corona, and the water film is too large or too small may affect the power supply voltage, resulting in unstable electric field voltage , so as to reduce the charging rate and removal efficiency of fine particles or acid mist; 3. Wet electrostatic precipitators generally use anode plates and cathode lines to be arranged staggered and parallel. ;4. The cathode line of the wet electrostatic precipitator is prone to dust accumulation

The above deficiencies have reduced the removal efficiency of wet electrostatic precipitators for pollutants such as fine particles and acid mist, and have also restricted their application.

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