A tank for storing oil includes a suction strainer with first and second filtration portions. The first filtration portion has a substantially cylindrical shape and formed by bending a thin plate into a pleated shape. The second filtration portion is provided on the outer side of the first filtration portion. The second filtration portion has a substantially cylindrical shape and is formed of a material having a plurality of spaces formed in a surface and interior of the material.

The present disclosure relates to a metal air filter including: a filter which is formed of a metallic material by electrodeposition and has a nano branch structure; an ionizer which conducts particles to be captured by the filter with negative charges; and a power supply which supplies a positive voltage for conducting the filter with positive charges and a negative voltage for the ionizer. The filter can be more simply manufactured at a lower cost than a conventional process.

A water purification device includes a heavy metal removal layer configured to remove heavy metal ions and perfluorinated compounds from contaminated water. The water purification device may further include a biological species removal layer configured to remove biological species from the contaminated water and a support layer configured to provide support for the water purification device.

An object of the present invention is to make a joined portion of a metal wire less likely to catch on other components and the like. A hollow cylindrical filter 200 is formed by winding one or a plurality of metal wires 220 in a helical and multilayered manner so that metal wire portions adjacent to each other in a direction toward an inner or outer diameter side extend in directions crossing each other. The filter includes a deformed joining part 231 including a first metal wire portion 220A having been pressed and deformed and a second metal wire portion 220B having been pressed and deformed via the first metal wire portion and joined to the first metal wire portion by resistance spot welding, where the deformed joining part penetrates into a communication space positioned at an inner side of the deformed joining part. Since the metal wire is pressed and deformed at the deformed joining part, the deformed joining part is less likely to catch on other components and the like during handling of the filter.

The mixing nozzle has a throat section, a diffuser section, a gas nozzle section, a first liquid suction port, a liquid nozzle section, a second liquid suction port, a baffle plate, and a jetting port. The first liquid suction port liquidly absorbs the solution in the water storage pool from a side of the gas nozzle section toward the gas nozzle tip. The liquid nozzle section extends to the downstream side of the gas nozzle section with intervening the first liquid suction port. The second liquid suction port liquidly absorbs the solution in the water storage pool from a side of the liquid nozzle section toward the liquid nozzle tip. The baffle plate is provided such that the mixed flow mixed in the diffuser section collides in front of a downstream end of the diffuser section, and divides and reverses the mixed flow.

A composite fiber having a core sheath-structure that includes a core portion having an electrically conductive material, and a sheath portion having a ceramic component covering the core portion. The composite fiber is constructed such that, when the core portion is connected to a ground, the sheath portion exhibits one of a positive surface potential or a negative surface potential over an entire surface of the sheath portion.

A metal nonwoven fabric contains a metal fiber and has liquid permeability. The metal fiber has an average fiber diameter of 20 nm or more and 10 m or less. The metal nonwoven fabric has a void distribution peak top diameter measured according to mercury porosimetry of 30 m or less. In the metal nonwoven fabric, the void distribution peak top diameter measured according to mercury porosimetry is preferably 0.01 m or more. Where a length of a crystal of a metal that constitutes the metal fiber in an extension direction of the metal fiber is represented by X and a length of the crystal in a direction perpendicular to the extension direction of the metal fiber is represented by Y, an arithmetic average value of values of a ratio X/Y of crystals that are present at three boundary regions formed by dividing a length of the metal fiber that constitutes the metal nonwoven fabric into four equal parts in the extension direction of the metal fiber is preferably 4 or less, the ratio X/Y being a ratio of the length X relative to the length Y.

An integrated catalytic reactor includes a heat source configured to heat an exhaust gas including an organic material and an alkaline material, a filter configured to filter a secondary pollutant in the exhaust gas that is heated by the heat source, an airflow stabilizer configured to adjust a flow direction and a flow speed of the exhaust gas that is filtered by the filter, and a catalytic assembly configured to at least partially remove the organic material and the alkaline material in the exhaust gas that flows into the catalytic assembly from the airflow stabilizer.