Electric dust collector

Abstract

An electric dust collector such that the ability to collect dust-like particles contained in a gas has been improved without significantly increasing the dimensions of the collector. Within the casing (12) of an electric dust collector (10), the flow of a gas (G) introduced into a distribution chamber (90) is controlled so that the gas (G) is distributed among a plurality of electrostatic flowpaths (58), is made to flow from the interior of the electrostatic flowpaths (58) into internal flowpaths (28) via mesh filters (30) which constitute a portion of a dust collecting electrode (16) and have a large surface area per unit volume, is discharged into a central chamber (33) via internal discharge outlets (32), and is discharged to the exterior of the collector via a gas discharge port (24).

Description

technical field [0001] The present invention relates to an electric dust collector for purifying gas containing dust-like bodies such as coal dust discharged from industrial equipment such as incinerators, melting furnaces, power generation boilers, and metal melting furnaces. Background technique [0002] In industrial devices such as incinerators, melting furnaces, power generation boilers, and metal melting furnaces, high-temperature exhaust gases containing dust-like objects such as coal dust (hereinafter referred to as "gas" .), and vent the gas to the outside of the device. After the gas discharged from industrial equipment is cooled to a certain temperature, it is sent to a filter type dust collector or an electric dust collector, and the dust is collected and removed by this dust collector. [0003] Comparing filter-type dust collectors with electric dust collectors, filter-type dust collectors using bag filters are generally better in terms of dust collection perfo...

AI Technical Summary

Problems solved by technology

[0010] However, in the electric dust collector described in Patent Document 1, in order to extend the contact length between the dust collecting electrode and the gas, the dust collecting electrode is formed in an elongated shape along the flow direction of the gas, and a plurality of collecting electrodes are arranged. In the case of the dust part, the size of the casing along the flow direction of the gas inevitably becomes longer, which is disadvantageous in terms of the installation space of the device.

[0011] In addition, as described in Patent Document 1, in order to effectively collect dust from the gas with a low concentration of dust, the discharge electrode and the dust collection electrode of the first dust collection part arranged on the upstream side In the case where the discharge electrode and the dust collecting electrode are arranged densely in the second dust collecting part on the downstream side, the dust collecting ability of the dust collecting part on the upstream side is worse than that of the dust collecting part on the downstream side. When collecting dust from a gas with a high concentration of dust particles, it is difficult to properly maintain the load balance between the dust collection part on the upstream side and the dust collection part on the downstream side, and the dust collection efficiency of the device may decrease.

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