Spray heads for use with desuperheaters and desuperheaters including such spray heads. One example of a spray head includes a main body having an exterior surface and defining a central passage, the main body adapted for connection to a source of fluid, at least one entrance port formed in the main body along the central passage, and at least one spray nozzle arranged adjacent the exterior surface of the main body. The spray head also includes a plurality of flow passages, each of the plurality of flow passages providing fluid communication between the entrance port and an exit opening of the spray nozzle. A first one of the plurality of flow passages follows a first non-linear path and has a first distance, and a second one of the plurality of flow passages follows a second non-linear path and has a second distance different from the first distance.

A foam discharging device includes: a storage portion that stores a liquid agent; a foamer mechanism that changes the liquid agent into foam to generate a foam body; and a discharging portion that discharges the foam body. The discharging portion includes a foam passing chamber that allows the foam body to pass, and one or a plurality of ejection-port forming wall portions that extend downward below the foam passing chamber, are formed into a closed-loop shape in plan view, have the inner space communicating with the foam passing chamber, and have the lower edge having an ejection port formed thereon. At least part of the ejection-port forming wall portion has a bottom end portion formed into a shape that has a thickness reduced toward the lower side. The ejection-port forming wall portion and a second portion. The height position of a lower edge of the first portion is higher than the height position of a lower edge of the second portion.

Spray heads for use with desuperheaters and desuperheaters including such spray heads. One example of a spray head includes a main body having an exterior surface and defining a central passage, the main body adapted for connection to a source of fluid, at least one entrance port formed in the main body along the central passage, and at least one spray nozzle arranged adjacent the exterior surface of the main body. The spray head also includes a plurality of flow passages, each of the plurality of flow passages providing fluid communication between the entrance port and an exit opening of the spray nozzle. A first one of the plurality of flow passages follows a first non-linear path and has a first distance, and a second one of the plurality of flow passages follows a second non-linear path and has a second distance different from the first distance.

A bubble generating device is disclosed which includes: a bubble generator including a tubular body, a liquid introduction port, a gas introduction port, and a discharge port; and a gas supply unit including a gas supply port, a pressurized gas being supplied to the bubble generator through the gas supply port, wherein the flow passage of the bubble generator extends substantially along a same axis, a plurality of reduced diameter portions each having an inner diameter reduced are provided along a direction along which the liquid flows, and gas-liquid mixing portions are provided downstream of the respective reduced diameter portions in a contiguous manner, each of the gas-liquid mixing portions having an inner diameter larger than a minimum inner diameter of each of the plurality of reduced diameter portions, and the gas introduction port of the bubble generator is formed of a plurality of through holes.

Spray heads for use with desuperheaters and desuperheaters including such spray heads. One example of a spray head includes a main body having an exterior surface and defining a central passage, the main body adapted for connection to a source of fluid, at least one entrance port formed in the main body along the central passage, and at least one spray nozzle arranged adjacent the exterior surface of the main body. The spray head also includes a plurality of flow passages, each of the plurality of flow passages providing fluid communication between the entrance port and an exit opening of the spray nozzle. A first one of the plurality of flow passages follows a first non-linear path and has a first distance, and a second one of the plurality of flow passages follows a second non-linear path and has a second distance different from the first distance.

A gas-liquid two-phase flow atomizing nozzle includes a nozzle core, an outer sleeve, and an atomizing body. An inner cavity of the nozzle core consists of an inlet tapered section, a jet flow section, and an outlet diffusion section. The outlet diffusion section of the nozzle core is connected to an atomizing body mixing chamber. The jet flow section of the nozzle core is in communication with external atmosphere through a core air inlet hole, an air inlet buffering chamber, and a sleeve air inlet hole.

Spray heads for use with desuperheaters and desuperheaters including such spray heads. One example of a spray head includes a main body having an exterior surface and defining a central passage, the main body adapted for connection to a source of fluid, at least one entrance port formed in the main body along the central passage, and at least one spray nozzle arranged adjacent the exterior surface of the main body. The spray head also includes a plurality of flow passages, each of the plurality of flow passages providing fluid communication between the entrance port and an exit opening of the spray nozzle. A first one of the plurality of flow passages follows a first non-linear path and has a first distance, and a second one of the plurality of flow passages follows a second non-linear path and has a second distance different from the first distance.

A spraying apparatus includes a spraying apparatus main body, a liquid introduction portion, a gas introduction portion, a gas-liquid spout portion, a liquid inlet, a gas inlet, a tubular flow passage, a spout, a flow passage having a taper, a straightener, and a projection portion. The liquid inlet allows a liquid flow to enter a gas-liquid mixer which is a space inside the annular gas introduction portion. The gas inlet allows a gas flow to enter the gas-liquid mixer. The straightener has an opening having an uneven shape provided in the flow passage having the taper. The projection portion is provided in the liquid introduction portion, protrudes to the gas-liquid mixer, and forms the straightener and a straightening outlet.

A gas-liquid two-phase flow atomizing nozzle includes a nozzle core, an outer sleeve and an atomizing body. An inner cavity of the nozzle core consists of an inlet tapered section, a jet flow section and an outlet diffusion section. The outlet diffusion section of the nozzle core is connected to an atomizing body mixing chamber. The jet flow section of the nozzle core is in communication with external atmosphere through a core air inlet hole, an air inlet buffering chamber and a sleeve air inlet hole.

A two-phase flow nozzle, having limited dimensions of main parts relating to size of atomized particle and having correction means to assure the height of a gap of a gas exit, wherein said gap is formed between a lower surface of a gas nozzle and an upper surface of a liquid nozzle is provided. The nozzle is composed with the first liquid passage, the liquid nozzle with a liquid splaying exit, a concave located at an end of the liquid nozzle where said liquid exit is located lower than said end of liquid nozzle, a gas nozzle having a gap to supply compressed gas for atomizing from the outer periphery of said liquid nozzle to the liquid injected from said liquid exit, and having a gas exit, wherein said gap is formed by sticking the minute spherical extrusion composed integrally on said liquid nozzle with a lower surface of said gas nozzle. Further, the contact of said minute spherical extrusion with said upper surface of gas nozzle is automatically corrected by supporting a convex spherical supported surface, which is provided at an intermediate portion of said liquid nozzle, with a concave spherical supporting surface, which is provided at an upper inner peripheral edge of a liquid nozzle holder.