Semi-wet electrostatic dust collector

Abstract

The invention discloses a semi-wet electrostatic dust collector and belongs to the technical fields of dust removal, waste gas treatment and environment protection. According to the semi-wet electrostatic dust collector, dust in airflow is charged firstly by means of a pre-charger, and then the airflow is made to flow through round plate type dust collecting electrodes which are vertically arranged in parallel; the lower half portions of the round plate type dust collecting electrodes are soaked in electrolyte solutions; the round plate type dust collecting electrodes rotate continuously under the action of a transmission shaft; the disc surfaces of every two adjacent round plate type dust collecting electrodes are soaked in two separated solution grooves respectively, and the electrolyte water solutions in every two adjacent solution grooves are loaded with voltages with different electric potentials respectively; liquid films exist on the solution grooves continuously along with the continuous rotation of the round plate type dust collecting electrodes, and the round plates with different electric potentials are used for adsorbing dust with different chargers respectively and eluting the adsorbed dust into the electrolyte water solutions continuously. The semi-wet electrostatic dust collector is high in dust removing efficiency, air resistance is quite small, and the semi-wet electrostatic dust collector is extremely suitable for indoor air purification.

Description

technical field [0001] The invention relates to a semi-wet electrostatic precipitator, which belongs to the technical fields of electric dust removal, waste gas treatment and environmental protection. Background technique [0002] With the rapid development of my country's economy, the haze air pollution in large and medium-sized cities, economically developed areas and areas with intensive basic industries in my country is becoming more and more serious. As my country's restrictions on SOx and NOx emissions become increasingly strict, and related environmental protection technologies and devices continue to be put into use, the increase in the total emission of SOx and NOx pollutants in my country's atmospheric environment has slowed down. However, from the current monitoring results, my country's long-term The smog pollution in the Delta, Pearl River Delta, and Beijing-Tianjin-Hebei areas has become increasingly serious, which has seriously threatened the health of the peop...

AI Technical Summary

Problems solved by technology

This method is very similar to the process of rainfall and haze elimination in the natural atmosphere, but its disadvantages are also very obvious: first, this method needs to use nozzles, liquid or gas with a certain pressure, which will bring additional equipment investment and bring Second, this method will cause the problem of "over-humidification" of the indoor air, which will make people feel uncomfortable in the rainy season with high humidity; third, the washing water used for spraying is often ordinary tap water, which is not suitable for For water containing more minerals, the spray will force the water to evaporate, causing the minerals in the water to become dust particles in the air, increasing the concentration of indoor particles

[0009] The inventor once proposed a technical solution for removing fine particles in the air by using a rotating turntable submerged in water as a dust collector (CN201410104461.3). This technical solution uses the water film on the surface of the rotating turntable as a dust collection medium. It can effectively fix dry dust and viscous dust, and solve the problem that particles in common electrostatic precipitators are easy to lose charge and escape. However, this technical solution also has its obvious defects: in the technical solution CN201410104461.3, each turntable is at the same potential, only It can capture the particles with the opposite charge to the dust collector. However, when the dust particles are very fine, the charging mechanism will change from electric field charging to diffusion charging. The effect of diffusion charging has no obvious charge Selectivity, so whether it is a positive corona or a negative corona, the dust particles will be charged with positive and negative charges at the same time, which leads to the technical solution disclosed in CN201410104461.3 with a removal effect of less than 80% for dust particles below 1.5 microns

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