Filter plate type electrostatic precipitator

Abstract

The invention relates to a filter plate type electrostatic precipitator. An anode row of the precipitator consists of a plurality of parallelly arranged box type filter plates; the box type filter plates are suspended on a suspending beam in a precipitator shell and are in alternative arrangement with a discharge electrode row, so that the filter plate box bodies configured in the shell and the discharge electrode row suspended among the filter plates form positive and negative electrode systems of the electrostatic precipitator; rapping devices are arranged at two sides of the cathode row and the anode row for rapping the cathode row configured at the electrode interval B and the filter plate box bodies periodically; upper opening ends of the filter plate air ducts are communicated with the air exhaust channels at the top of the precipitator; an electric field and a metal filter plate form a composite dust precipitation chamber, and dust attached to the outer surface of the filter plate falls into a dust hopper. According to the invention, the bidirectional dust precipitation under the action of electric field power and air flow power does not generate secondary dust flying; the system resistance is relatively low, and is less than or equal to 500Pa; the dust filtering and precipitation speed is improved by 60 times; the service life of a filter cartridge can reach 10 years; the dust precipitation efficiency Eta is greater than or equal to 99.95%; the absorption of fine dust (not greater than 1 micron) can meet the PM2.5 emission requirement.

Description

technical field [0001] The invention relates to the technical field of electrostatic dust removal for electrostatic precipitators, in particular to a filter plate type electrostatic precipitator. Background technique [0002] The traditional dust removal methods currently mainly adopt two dust removal principles, one is the principle of electrostatic dust removal, and the other is the principle of filter dust removal. The principle of electrostatic precipitator is the ideal dust removal method recognized by the industry in history. If the problem of secondary dust emission of the electrostatic precipitator itself can be solved, it will be the most ideal industrial waste gas dust removal equipment. The principle of electrostatic dust removal technology is: neutral dust is charged through the electric field and is adsorbed by the opposite electrode under the action of the electric field force. After the charge is released, the dust is collected by vibration cleaning. The adva...

AI Technical Summary

Problems solved by technology

But the main disadvantage is: the problem of secondary dust cannot be suppressed, and it is difficult to meet the increasing national standards for atmospheric emissions under the condition of online monitoring

The advantage of the bag (filter type) dust collector is that it can ensure that the discharge reaches the standard (provided that the filter bag is not damaged), but its main disadvantage is that the equipment has a large operating resistance, generally 1000-1500Pa, and the filter bag is easily damaged. Large amount of maintenance, high operating costs and not suitable for high temperature, high corrosion, high humidity environment

The electrostatic precipitator can no longer meet the requirements of the new standard due to its own secondary dust problem, so under the existing conditions, most enterprises have to choose the bag filter as the dust removal equipment for industrial waste gas.

However, due to the shortcomings of the bag filter, such as large resistance and easy damage, it is not an ideal dust removal equipment.

[0005] During this period, many dust removal companies at home and abroad have developed electric bag combined dust collectors. The purpose of the research and development is to solve the secondary dust problem of electrostatic precipitators through the combination of electric bags, increase the service life of filter bags, and reduce system resistance. The dust generated by ozone in the dust part seriously oxidizes the filter bag, and the life of the filter bag cannot be increased by reducing the load of the filter bag, and the system resistance increases by 1200-1600Pa in actual operation, so it is actually better to choose the bag filter directly than the electric bag filter

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