Wet type electric precipitation device and method for removing fine particulate matters in smoke desulfurized by wet process

Abstract

The invention belongs to the technical field of environmental protection equipment, and particularly relates to a wet type electric precipitation device and a method for removing fine particulate matters in smoke desulfurized by a wet process. The wet type electric precipitation device comprises a casing, a smoke inlet end arranged at the upper part of the casing, a dust charging area arranged at the upper end of the smoke inlet end, a dust collecting area arranged in the middle in the casing, washing devices arranged above the dust collecting area, a smoke outlet area, an ash discharge area, a coagulation and agglomeration area and a secondary pre-charge area, wherein the smoke outlet area and the ash discharge area are arranged below the dust collecting area; a smoke turbulence device is arranged in the coagulation and agglomeration area; the washing devices comprise a continuous water film ash removal device and at least one stage of spraying ash removal device; the distance between a discharge electrode and a dust collection electrode is 150-350 mm; and an outlet flue forming an intersection angle of 3-15 degrees with the horizontal direction is arranged in the smoke outlet area. The invention further provides the method for removing the fine particulate matters. The method comprises steps as follows: 1), dust charging; 2), coagulation and agglomeration; 3), secondary pre-charging; 4), dust collection; and 5), mist removal. According to the device and the method, the dust removal efficiency is high, and the effect is good.

Description

technical field [0001] The invention belongs to the technical field of environmental protection equipment, and relates to a wet electrostatic precipitator and method for removing fine particles of flue gas after wet desulfurization. Background technique [0002] The fine particulate matter emitted by coal-fired boilers and industrial kilns is PM in the atmosphere. 2.5 my country's energy structure also determines that my country will continue to use coal as the main energy source in the long run. Although most coal-fired boilers and industrial kilns have adopted dust removal and desulfurization equipment, the PM in flue gas 2.5 The removal efficiency of fine particles is low, and most of the existing coal-fired boilers and industrial kilns adopt traditional dust removal and wet desulfurization processes. Although the concentration of large particles in the flue gas after wet desulfurization is reduced, the fine particles The total amount of fine particles such as dust and ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a wet electrostatic precipitator and method for removing fine particles in the flue gas after wet desulfurization, to overcome the existing wet electrostatic precipitator to remove PM in the flue gas 2.5 The problem of low efficiency of fine particles and poor dust removal effect

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