WET ELECTROSTATIC PRECIPITATOR AND FLUE GAS TREATMENT METHOD

摘要

A wet electrostatic precipitator includes an electric field forming unit including a first electrode and a second electrode which form an alternating electric field. The first electrode is a flat plate, and has a plurality of discharge electrodes on a surface that opposes the second electrode. The second electrode includes a discharge frame, a first flat plate portion and a second flat plate portion. The first flat plate portion opposes the discharge electrode of the first electrode. A plurality of discharge electrodes are formed on a surface of the second flat plate portion that opposes the first electrode. The discharge electrodes alternately generate corona discharges having opposite polarities in a direction perpendicular to a flow direction of gas, and alternately apply charges having opposite polarities to mist and dust. The first electrode and the first flat plate portion trap the charged mist and the dust.

主权项

1. A wet electrostatic precipitator for removing SO3 and dust contained in gas, comprising:
an electric field forming unit which includes a first electrode and a second electrode that are arranged to oppose each other along a flow direction of the gas containing mist having the SO3 incorporated therein and the dust so as to form a direct current electric field, wherein the first electrode is a flat plate and includes a plurality of discharge electrodes formed on a surface of the first electrode that opposes the second electrode, along the flow direction of the gas at predetermined intervals, the second electrode includes a discharge frame, a first flat plate portion which extends in a direction substantially perpendicular to the flow direction of the gas and is provided at a position that opposes the discharge electrode of the first electrode, and a second flat plate portion which extends in the direction substantially perpendicular to the flow direction of the gas and has a plurality of discharge electrodes formed on a surface that opposes a flat surface part of the first electrode, the first flat plate portion and the second flat plate portion are arranged along the flow direction of the gas, the discharge electrode of the first electrode and the discharge electrode of the second electrode alternately generate corona discharges having opposite polarities in the direction perpendicular to the flow direction of the gas so as to alternately apply charges having opposite polarities to the mist and the dust by the corona discharges when the gas passes through between the first electrode and the second electrode, and the first electrode and the first flat plate portion trap the charged mist and the dust.