One illustrative cyclone separator disclosed herein includes an outer body, an inner body positioned at least partially within the outer body, an internal flow path within the inner body, the internal flow path having a fluid entrance and a fluid outlet, a first fluid flow channel between the inner body and the outer body, and a re-entrant fluid opening that extends through the outer body and is in fluid communication with the fluid flow channel, wherein the re-entrant fluid opening is positioned at a location upstream of the fluid entrance of the internal flow path in the inner body.

Provided is a dust collection method using a dust collection device. The dust collection method includes: a step of forming a rotating airflow by means of suction with a suction device, the rotating airflow progressing while spiraling along an inner wall surface of a main body; a step of supplying liquid from a supply nozzle; a step of spreading out the liquid with the rotating airflow on the inner wall surface thereby to continuously form a liquid catcher, the liquid catcher rotating as a film of the liquid; and a step of separating smoke and/or dust to outside by centrifugal force due to the rotating airflow and capturing the smoke and/or dust with the liquid catcher, the smoke and/or dust being contained in air introduced to the inside of the main body.

A surface cleaning apparatus comprising a first cyclonic cleaning stage having a first cyclone chamber and a first dirt collection chamber external to the first cyclone chamber. The first cyclone chamber has a cyclone first end, an opposed cyclone second end, a cyclone sidewall extending between the cyclone first end and the cyclone second end, a cyclone air inlet, a cyclone air outlet, a cyclone dirt outlet in communication with the first dirt collection chamber and a cyclone longitudinal axis extending from the cyclone first end to the cyclone second end. The dirt outlet comprises a plurality of apertures.

A dual-airflow cyclone flash drying device includes a feeding device, a fluidizing cyclone generator and a drying cylinder. The fluidizing cyclone generator is connected with the drying cylinder through a central connecting pipe. The tail end of the feeding device is provided with a porous plate doser that is connected with the central connecting pipe. The fluidizing cyclone generator adopts lateral air supply, air forms a cyclone along the circular outer wall to enter the central connecting pipe. A drying cyclone generator is arranged at the lower portion of the drying cylinder. The drying cyclone generator adopts lateral air supply, and after forming a cyclone, air spirally rises to make contact with fluidized granular sludge to evaporate sludge moisture into water vapor. A particle size selector is arranged at the upper portion of the drying cylinder, and an outlet flue is arranged above the particle size selector.

A surface cleaning apparatus, such as an extractor, has a liquid delivery system operable to alternately deliver a carpet cleaning solution and a hard floor cleaning solution.

A surface cleaning apparatus such as an extractor is operable in a floor cleaning mode which utilizes a floor cleaning fluid flow path. The surface cleaning apparatus is also operable in an above floor cleaning mode which utilizes a different above floor fluid flow path.

A cyclone type receiver can be used in a pneumatic conveyor system for accurately delivering a wide variety of particulate materials. A receiver may include a cylindrical body configured to hold a filter. The top end of the cylindrical body may include an air inlet for receiving a ducted air stream filled with a particulate material, and may be configured to convey the ducted air stream helically toward a conical section attached to the cylindrical section. The conical section may be configured to route the ducted air in a helical manner to remove the particulate material from the ducted air. In such a configuration, the filter and the conical section may remove particulate material, thereby preferably increasing the transfer accuracy of the system and reducing the footprint of a traditional pneumatic conveyor system.

An upright surface cleaning apparatus such as an extractor has an upright section moveably mounted to a surface cleaning head. The upright section comprises a first stage liquid separator and a second stage cyclone separator, wherein the cyclone separator is positioned above and downstream from the first stage liquid separator when the upright section is in the storage position.

A device for separating and extracting suspended solids and particles from a fluid is shown. The device can include a hydro-cyclonic process unit, a variable geometry vortex process unit, a reverse coalescence and flocculation process unit and a fixed geometry vortices separator process unit. The fluid to be treated can enter the device through a fluid inlet and travel and recirculate through the several process units. The process units can collectively induce vorticose separation of the fluid and separate suspended solids and particles within the fluid. The suspended solids and particles can then be extracted from the device via one or more extraction fluid outlets. After the desired amount of suspended solids and particles has been removed, the processed fluid can be discharged from the device.

Provided is a cyclone dust collector with a higher particle collection efficiency than before. The cyclone dust collector of the present invention includes a nozzle assembly including a plurality of the nozzles arranged within a first cross section defined by a plane containing a center axis of the cylindrical case and part of the spiral flow path intersecting with each other, the nozzles being adapted to spray the water mist in a direction along the first cross section.