Provided is an ion wind generation device which is capable of providing a wide range of ion delivery and providing ion wind having a reduced ozone concentration near a nozzle without use of a filter or the like.

The ion wind generation device includes an electrode pair including a discharge electrode body having a discharge portion and a counter electrode body having a plurality of end portions, and generates ion wind by corona discharge that occurs due to a potential difference generated between the discharge portion and the end portions. The end portions are located spaced apart from one another in a single plane and disposed around an axis of the discharge electrode body in the single plane or disposed along a line in the single plane.

An apparatus for producing an inorganic powder and an apparatus for producing and classifying an inorganic powder are provided, wherein the apparatus for producing an inorganic powder includes an insulating tube, at least one pair of annular RF electrodes, and a gas supply apparatus. The pair of annular RF electrodes surrounds the outer circumference of the insulating tube to generate a first electric field region outside the insulating tube and generate a second electric field region having a plasma torch in the insulating tube after being turned on. The gas supply apparatus supplies a reaction mist and an inert gas into the insulating tube to thermally degrade and oxidize the reaction mist into an inorganic powder via the plasma torch.

An apparatus includes at least one electron beam generator for generating accelerated electrons with which bulk material particles are impingeable during free fall. The electron beam generator has an annular design in which the electrons are emitted and accelerated by an annular cathode. The electrons exit from an electron outlet window in the direction of the ring axis. The annular electron beam generator is arranged in such a way that the ring axis of the electron beam generator is oriented perpendicular to, or at an angle of up to 45? from the horizontal. The apparatus may further include a device for separating bulk material particles arranged above the annular electron beam generator, the bottom wall of said device having at least one opening out of which the bulk material particles fall and, from there, fall through the ring which is formed by the electron beam generator.

A methane purification system includes one or more components that cool and compress an input methane-containing gaseous mixture stream to form a first methane-containing gaseous mixture stream. A filter-separator in fluid communication with the one or more components receives the first methane-containing gaseous mixture stream removing water therefrom to form a second methane-containing gaseous mixture stream. An activated carbon station receives the second methane-containing gaseous mixture stream removing hydrogen sulfide therefrom to form a third methane-containing gaseous mixture stream. A methanol scrubber that receives the third methane-containing gaseous mixture stream or an expanded stream therefrom, removing carbon dioxide to form a fourth methane-containing gaseous mixture stream. A final stage separator produces a purified methane stream from the fourth methane-containing gaseous mixture stream or an expanded stream therefrom.

A treatment apparatus and a sterilization apparatus each include a liquid reservoir portion configured to store a treatment subject liquid, a plasma generation portion configured to generate a plasma on or above a liquid surface of the treatment subject liquid, and a bubble supply portion configured to generate a bubble containing the generated plasma on or above the liquid surface and configured to supply the bubble into the treatment subject liquid. Thus, the plasma is generated on or above the liquid surface of the treatment subject liquid, and the bubble containing the generated plasma is generated and supplied into the treatment subject liquid.