A filter-type wet electrostatic precipitator and method

Abstract

The invention discloses a filter-screen wet-type electric dust removing device. The electric dust removing device comprises a flue gas inlet device, a flue gas processing device and a flue gas discharging device, wherein the flue gas inlet device, the flue gas processing device and the flue gas discharging device are sequentially and closely connected with one another to form an integrated semi-enclosed device which is provided with openings in the two ends; a plurality of parallel anode plates and cathode wires arranged among the anode plates are arranged inside the flue gas processing device; dust collecting devices are arranged at the tail ends of the anode plates, and are used for capturing dust escaping from the tail ends of the anode plates. The electric dust removing device is efficiently intelligentized, and can effectively capture dust escaping along the surfaces of the dust collecting anode plates, increase the dust collecting areas of electric fields of dust removers, improve the dust collecting efficiency and avoid reentrainment pollution; in the wet-type soot cleaning process, the dust temperature can be further reduced, the dust moisture is increased, the dust specific resistance is reduced, and the dust removing efficiency is improved; meanwhile, when atmosphere hazardous materials are removed, effective ingredients in pollutants are extracted and converted into useful chemical fertilizers, low carbon and environment protection are realized, and the sustainable development of enterprises is facilitated.

Description

technical field [0001] The invention relates to electric dust removal technology, in particular to a filter-screen wet electric dust removal device and method. Background technique [0002] In January 2013, central and eastern my country continued to suffer from haze weather. Among them, Beijing, Hebei and other places are particularly serious, and the visibility in some areas is less than 200m. Formation of smog and PM in the air 2.5 and other fine particulate matter content are inseparable. Naturally, thermal power plants, which are large polluters of air, have attracted much attention. For this reason, the State Electricity Regulatory Commission urgently deployed coal-fired power plants, especially coal-fired power plants in North China, to do their utmost to reduce pollutant emissions on the basis of meeting pollution standards. [0003] In 2013, the state issued a number of documents one after another. The latest "Emission Standards of Air Pollutants for Thermal Pow...

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Problems solved by technology

However, in the actual transformation process, these technologies have more or less shortcomings: although the bag filter can meet the current environmental protection standards, its service life is limited, and the cost of the entire transformation project is high; the main technical advantages of the rotating plate type electrostatic precipitator It is high-efficiency, energy-saving, and widely adaptable. The main disadvantage is that it has high requirements for equipment design, manufacturing, and installation technology, and there are rotating parts, which increases the probability of failure; the existing wet electrostatic precipitator WESP uses water spray or overflow water A layer of water film is formed on the surface of the dust collecting electrode by other methods, and the dust deposited on the electrode plate is washed away by the electrostatic precipitator. No rapping device, reliable operation, high dust removal efficiency, small pressure loss, simple operation, low energy consumption, no moving parts, no secondary dust, low maintenance costs, short production downtime, and can work in flue gas The dew point temperature is lower, the compact structure can be combined with other flue gas treatment equipment, and the design forms are diversified; however, the investment cost is also relatively large, and there are still technical problems of dust escape on the surface of the dust collecting plate, which seriously affects the Dust collection efficiency

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