A compact disc stack cyclone separator includes: a fluid inlet; a vortex generator which generates a forced vortex; a conical or cylindrical vortex generating chamber; a separation chamber which is a cavity formed by downstream open ends of stacked truncated cones; narrow gaps between the stacked truncated cones, a collecting channel for heavy phrase fluid from the gaps between the stacked truncated cones which installed about the outlets of the gaps at upstream open end of the stacked truncated cones to channel heavy phrase fluid to a storage chamber of heavy phrase fluid; and an outlet for heavy phrase fluid to flow out from the storage chamber of heavy phrase fluid, while the outlet of light phrase fluid is annexed to the downstream open end of the last stacked truncated cone which is the downstream open end of separation chamber.

An oily sewage pretreatment method without air flotation, comprising the following steps: (a) sedimentation separation: performing sedimentation separation on oily sewage to implement preliminary separation of oil, sludge, and water; (b) boiling bed separation: performing boiling bed separation on the oily sewage obtained by the preliminary separation to further remove dispersed oil, sludge, and sand from the oily sewage; (c) shape coalescence separation: performing shape coalescence separation on the oily sewage obtained by the boiling bed separation in step (b) to implement demulsification, coalescence, and separation of emulsified oil; and (d) biochemical treatment: the effluent obtained in step (c) directly enters an AOH biochemical system, an air flotation unit is omitted. Also disclosed is an oily sewage pretreatment apparatus without air flotation.

A filter system. The filter system comprises a baghouse head assembly, a baghouse lower assembly and a baghouse inside shell assembly. The baghouse head assembly and the baghouse lower assembly are configured to selectively close and open between an open configuration and a closed configuration. The baghouse inside shell assembly comprises an upper surface and a one or more bag filters. The filter system comprises a lower cavity and an upper cavity. The lower cavity comprises a space between a side portion of the baghouse lower assembly and a shell of the baghouse inside shell assembly. The upper cavity comprises a space between the upper surface of the baghouse inside shell assembly and a lid portion or the baghouse head assembly. The one or more bag filters are configured to filter air flow between the lower cavity and the upper cavity.

Provided is a chiller and system that may be utilized in a supercritical fluid chromatography method, wherein a non-polar solvent may replace a portion or all of a polar solvent for the purpose of separating or extracting desired sample molecules from a combined sample/solvent stream. The system may reduce the amount of polar solvent necessary for chromatographic separation and/or extraction of desired samples. The system may incorporate a supercritical fluid chiller, a supercritical fluid pressure-equalizing vessel and a supercritical fluid cyclonic separator. The supercritical fluid chiller allows for efficient and consistent pumping of liquid-phase gases employing off-the-shelf HPLC pumps. The pressure equalizing vessel allows the use of off-the-shelf HPLC column cartridges. The system may further incorporate the use of one or more disposable cartridges containing silica gel or other suitable medium. The system may also utilize an open loop cooling circuit using fluids with a positive Joule-Thompson coefficient.

A vacuum cleaning apparatus may include a debris container and a filtering system. The debris container may define a debris collection chamber and include a dirty air inlet and a clean air outlet. The filtering system may be at least partially disposed in the debris collection chamber, and may include a fluff screen and a fluff screen cover defining a cavity for receiving at least a portion of the fluff screen. The fluff screen and the fluff screen cover may both include tapered outer surfaces. The tapered outer surfaces may have opposing tapers.

A uniflow cyclone for a hand vacuum cleaner has a dirt chamber that is external to the cyclone chamber and vortex finder, which has a solid portion that is spaced from and faces a dirt outlet of the cyclone chamber and a porous section that is angularly spaced around the cyclone axis of rotation of the cyclone from the solid portion.

The invention relates to preventing microplastics from the entering the environment. In particular the invention is directed to filtering microfibers from the waste water from washing machines as well as waste from other appliances and other sources of effluent with entrained microplastics or other microp-ollutants. A separator is provided for separating microplastics from effluent comprising; a chamber including at least one sieve structure, a shroud that acts as a vortex finder and a baffle coaxial with the shroud and projecting upwards from the lower end of the chamber, wherein the shroud has a circular lower rim and the baffle has a circular upper rim, wherein the radius of the lower rim of the shroud is greater than the radius of the upper rim of the baffle.

A cleaner includes a suction unit guiding air and dust, a main body including a first cyclone unit separating the air and the dust, which are suctioned through the suction unit, from each other and a second cyclone unit separating the dust from the air discharged from the first cyclone unit, and a guide unit disposed in the main body to partition a first dust storage part, in which the dust separated in the first cyclone unit is stored, and a second dust storage part, in which the dust separated in the second cyclone unit is stored, from each other. The guide unit is separably coupled to the main body, and when the guide unit is separated from the main body, a dust discharge part of the second cyclone unit is exposed to the outside.

A particle separator assembly includes an airbox providing an outer tapered portion tapering from a first section having a first cross sectional area to a first opening having a second cross sectional area less than the first cross sectional area. The example assembly includes a flow diverter providing an inner tapered portion that tapers to a second opening. The example assembly includes an air filter housed by the airbox, the air filter is spaced from the second opening in a first direction, and the first opening is spaced from the second opening in a second direction opposite the first direction.

A hand vacuum cleaner has a cyclone assembly having a cyclone with a central longitudinally extending axis wherein, when the upper end of the hand vacuum cleaner is positioned above the lower end of the hand vacuum cleaner, the central longitudinally extending axis is oriented generally horizontal. The cyclone assembly has a cyclone assembly height that extends between an upper end of the cyclone assembly and a lower end of the cyclone assembly with a medial portion of the cyclone assembly positioned between the upper end and the lower end of the cyclone assembly. A housing containing the suction motor is positioned rearward of the cyclone assembly and extends downwardly from the upper end of the cyclone assembly to the medial portion. A pistol grip handle is positioned rearward of the cyclone assembly, below the housing and extends downwardly from the medial portion.