Wet-type electrostatic dust collector cathode and anode configuration structure

Abstract

The invention discloses a wet-type electrostatic dust collector cathode and anode configuration structure. The wet-type electrostatic dust collector cathode and anode configuration structure comprises a cathode and an anode, wherein the cathode is installed on a cathode framework, the anode is installed on an anode framework, and the anode is in a regular-hexagonal tubular shape; the cathode is a cathode with discharging pins, the discharging pins are distributed on the cathode in a layering manner, each layer is provided with three discharging pins, adjacent layers are staggered to form an angle of 60 degrees, and the inter-layer distance is 25mm to 100mm; the discharging pins are vertically connected to the cathode, and each discharging pin points to the regular-hexagonal tubular corner of the anode. By adopting the wet-type electrostatic dust collector cathode and anode configuration structure, the anode can uniformly and effectively trap electrons and charged pollutants; voltage corona inception and corona stability of the cathode can be reduced, the discharging position of the cathode can be set according to the anode form, the length of each cathode discharging pin can be set according to the medium condition, the discharge intensity can be adjusted according to the angle, and simplicity and easiness can be realized; moreover, a needlepoint-shaped discharge point does not have the problem that the discharging is suppressed by the coating of dust and gypsum in the wet smoke; the cathode-anode configuration structure can be adaptive to a wet-type dust collector, and the application is wide.

Description

technical field [0001] The invention relates to a cathode-anode arrangement structure of a wet dust collector of a coal-fired thermal power unit, in particular to an arrangement structure of a hexagonal cylindrical anode and a six-pin herringbone cathode. Background technique [0002] In September 2014, the National Development and Reform Commission, the Ministry of Environmental Protection and the Energy Bureau issued the "Coal Power Energy Conservation and Emission Reduction Upgrade and Transformation Action Plan (2014-2020)", which proposed that the dust emission of new coal-fired units in the east, central and west up to 5mg / Nm 3 The emission limit requirements of gas turbine units, the coal-fired thermal power units in the eastern region have already implemented this ultra-low emission standard. The wet electrostatic precipitator is installed after the WFGD system of the thermal power unit to coordinate and efficiently remove a small amount of fine dust, gypsum, acid m...

AI Technical Summary

Problems solved by technology

The shortcomings of the existing technology are: (1) The horizontal plate anode uses expensive stainless steel alloy materials due to structural strength limitations, and is severely corroded in strong acidic wet flue gas; the vertical quadrilateral mostly uses corrosion-resistant flexible cloth as the anode , under the condition of high wind speed above 3m / s, the shaking is obvious, the electric field parameters fluctuate greatly, and the life of the flexible cloth is only one overhaul cycle

These two anode arrangements have a large proportion of dust collection "blind areas", which cannot evenly capture the electrons emitted by the cathode and the defects of charged pollutants

(2) The sharpness (that is, curvature) of the long-line pointed shape and the saw-tooth pointed shape is small, and the discharge intensity is difficult to meet the saturated charging requirements of wet flue gas dust in the thermal power industry, while the pointed shape of the thorn is large and has many discharge points. The phenomenon of excessive corona burning through the plates is easy to occur locally, and the discharge tips of these three cathodes all adhere to the fine dust and gypsum in the flue gas to inhibit the discharge

(3) The cathode discharge intensity and divergence of the existing anode-cathode configuration structure do not match the wet flue gas conditions, and the spatially uneven electric field strength of the anode and cathode is low

The above deficiencies seriously reduce the efficiency of wet electrostatic precipitator to remove pollutants

Images