Static electricity high-efficient collecting device applicable to water mist discharged by wet cooling tower of thermal power plant

Abstract

The invention discloses a static electricity high-efficient collecting device applicable to water mist discharged by a wet cooling tower of a thermal power plant. The static electricity high-efficient collecting device comprises a high-voltage electricity supply device, a corona electrode (a cathode), a regular hexagonal prism-shaped water mist collection electrode (an anode), a superterranean device and a grounding device. Water molecules are polar molecules, and the gravity centers of positive charges and negative charges are not coincident; and circular cooling water in the cooling tower contains impurities, and is an electric conductor. A great many free charges and anions are generated because of corona discharge, so that the water particles are charged. Under the effect of an electric field, the free charges move toward the regular hexagonal prism-shaped water mist collection electrode (the anode) under the effect of an electric field force; when the free charges pass through suspended water particles in the water mist, the free charges are attached onto the water particles to form anions, and the anions gather on the anode under the effect of the electric field force; the electrons are released, and the suspended water particles deposit to be liquid-state; meanwhile, the original small water particles can gather to form larger particles due to the mutual effect among the charged particles; and the particles flow down along an anode plate under the effect of gravity, so that high-efficient recovery of moisture is realized. The static electricity high-efficient collecting device is simple in structure, low in cost and long in service life and is corrosion-resistant; the water mist discharged by the cooling tower can be recycled; and the static electricity high-efficient collecting device has a wide engineering application prospect.

Description

technical field [0001] The invention relates to an electrostatic high-efficiency trapping device used for emptying water mist from a wet cooling tower of a thermal power plant, and belongs to the technical field of energy saving and emission reduction of thermal power plants. Background technique [0002] The water loss of wet cooling towers in thermal power plants includes three major parts: evaporation loss, wind blowing loss and sewage loss. Among them, evaporation loss and wind blowing loss are discharged into the air together with the air, resulting in a great waste of water resources. This is the largest water consumption in thermal power plants. one of the parts. Statistics show that the sum of water loss in wet cooling towers accounts for about 65%-75% of the total water loss in power plants. Taking 2×300MW thermal power units as an example, the evaporation loss is about 1130t / h, accounting for 62.08% of the water loss in power plants ; While the wet cooling tower i...

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Problems solved by technology

[0004] But so far, the successful engineering application cases of cooling tower water mist recovery technology based on high-voltage electrostatic technology are still rarely reported, and the existing water-saving technology still cannot fundamentally improve the problem of large water loss in wet cooling towers

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