Gas purifying device, gas purifying system and gas purifying method

A gas purifying device having a first electric field forming unit which forms an electric field for discharge in a gas channel in which a purification target gas flows to generate a discharge plasma, and charges and burns particulate matter included in the purification target gas by action of the discharge plasma, and a second electric field forming unit which forms an electric field for dust collection to capture the charged particulate matter by an electrical dust collection function and draw out the discharge plasma to the gas channel side,

• wherein at least one of an inner wall face of the gas channel on a side where the first electric field forming unit is disposed, an inner wall face of the gas channel on a side where the second electric field forming unit is disposed, a discharge electrode forming the first electric field forming unit, and a dust collection electrode forming the second electric field forming unit has a surface formed of a recess and projection face.

A gas purifying device having a first electric field forming unit which forms an electric field for discharge in a gas channel in which a purification target gas flows to generate a discharge plasma, and charges and burns particulate matter included in the purification target gas by action of the discharge plasma, and a second electric field forming unit which forms an electric field for dust collection to capture the charged particulate matter by an electrical dust collection function and draw out the discharge plasma to the gas channel side,

• wherein a catalyst layer is formed on a surface of at least one of an inner wall face of the gas channel on a side where the first electric field forming unit is disposed, an inner wall face of the gas channel on a side where the second electric field forming unit is disposed, a discharge electrode forming the first electric field forming unit, and a dust collection electrode forming the second electric field forming unit.

A gas purifying device having a first electric field forming unit which forms an electric field for discharge in a gas channel in which a purification target gas flows to generate a discharge plasma, and charges and burns particulate matter included in the purification target gas by action of the discharge plasma, and a second electric field forming unit which forms an electric field for dust collection to capture the charged particulate matter by an electrical dust collection function and draw out the discharge plasma to the gas channel side,

• the device, comprising,
• an additive gas supply unit which supplies an additive gas capable of generating oxidative radicals on an upstream side of positions where the first electric field forming unit and the second electric field forming unit are disposed.

A gas purifying method for a gas purifying device comprising a first electric field forming unit which forms an electric field for discharge in a gas channel in which a purification target gas flows to generate a discharge plasma, and charges and burns particulate matter included in the purification target gas by action of the discharge plasma, a second electric field forming unit which forms an electric field for dust collection to capture the charged particulate matter by an electrical dust collection function and draw out the discharge plasma to the gas channel side, and a control unit controlling the first electric field forming unit and the second electric field forming unit,

• the method, comprising,
• by the control unit, detecting information related to burning treatment of particulate matter in the first electric field forming unit, and controlling an operation state of the first electric field forming unit and/or the second electric field forming unit based on the detected information.

A gas purifying method for a plurality of gas purifying devices arranged in series or parallel and each comprising a first electric field forming unit which forms an electric field for discharge in a gas channel in which a purification target gas flows to generate a discharge plasma, and charges and burns particulate matter included in the purification target gas by action of the discharge plasma, a second electric field forming unit which forms an electric field for dust collection to capture the charged particulate matter by an electrical dust collection function and draw out the discharge plasma to the gas channel side, and a control unit controlling the first electric field forming unit and the second electric field forming unit,

• the method, comprising,
• by the control unit, detecting information related to burning treatment of particulate matter in the first electric field forming unit in each of the gas purifying devices, and controlling an operation state of the first electric field forming unit and/or the second electric field forming unit based on the detected information in each of the gas purifying devices.