Embodiments of the disclosure provide a foam fractionation method and system that include a foam collection container having a body, a collection tube coupled to the collection container, and a foam collection conduit coupled with foam removal piping disposed within a chamber formed by the body of the collection cone. The collection container and the collection tube are coupled to allow for pressurization within the chamber. A mouth of the foam collection conduit is operable to receive foam.

Disclosed herein is a multibubble injection type DAF (Dissolved Air Flotation) water treatment apparatus which supplies fine bubbles injected through injection of saturated water to a lower area of a separation zone as well as a lower area of a contact zone of a flotation basin, thereby improving removal efficiency of flocs.

A process and apparatus for recovering crude tall oil are disclosed. Acidulation of a crude tall oil soap stream generates a spent acid stream that comprises lignin and entrained crude tall oil. By subjecting the spent acid stream to dissolved gas flotation, a lignin phase comprising entrained crude tall oil can be recovered and causticized, resulting in recovery of most of the crude tall oil that was present in the spent acid stream. A clarified spent acid stream is also generated, which can be treated with caustic and utilized for a soap washing process that integrates easily into the overall CTO recovery process. The apparatus comprises a crude tall oil acidulation unit, a dissolved gas flotation unit, a causticizing unit, and a soap separation unit. The inventive process marries dissolved gas flotation, a well-known water treatment process, with causticization of a recovered lignin phase, a step known from batch acidulation, to improve overall tall oil recovery from a continuous process.

A gas flotation tank is provided that includes a series of adjacent chambers which impart a rotational current therein. Each chamber is separated from a skim oil trough by a skimming weir. Each chamber comprises an alternating fluid communication device between adjacent chambers allowing fluid communication between adjacent chambers in the form of a communication port in the dividing wall between adjacent chambers and a chamber outlet in conjunction with a perforated plate and the outlet is positioned in fluid communication with the final chamber. An optional coalescing media may be positioned in or proximate the communication port to absorb or coalesce contaminants as they pass therethrough.

The present invention relates to an apparatus for separation of hydrocarbons from hydrocarbon-containing produced water, comprising; a separator tank, at least one inlet tube (22, 27), at least one branch means (6) distributing the produced water stream, at least one outlet nozzle (7) and at least one guide vane (8.1) mounted under each outlet nozzle and leading water over the next outlet nozzle; at least one outlet (12) in the bottom of the tank for cleaned water and at least one outlet (9, 35, 36) rejecting rising gas with adherent oil droplets, at least one shroud (39) is arranged entirely or partly along the inside of at least one guide vane (8.1) in an angle of 30 to 150 related to the at least one guide vane (8.1). Further the invention relates to a process for separation of hydrocarbons from hydrocarbon-containing produced water.

A flotation separation apparatus for separating particles in suspensions, feeds slurry containing the particles through an inlet into a contactor where gas is fed through an inlet to mix with the slurry, for example in a downwardly plunging jet, to form a gas-liquid bubbly two-phase mixture under pressure from an outlet restriction in a throttling duct. The mixture is passed through a flow manipulator configured to induce a high energy dissipation rate, for example by way of a Shockwave formed in a diverging section of the throttling duct reducing the size of the bubbles and brining those bubbles into intimate contact with particles in the mixture which is released into a separation cell where a flow manipulating draft tube is provided to reduce turbulence in the mixture. Alternative apparatus and methods for inducing the high energy dissipation rate and for reducing turbulence in the mixture are also described and claimed.

A gas flotation tank is provided that includes a series of adjacent chambers which impart a rotational current therein. Each chamber is separated from a skim oil trough by a skimming weir. Each chamber comprises an alternating fluid communication device between adjacent chambers allowing fluid communication between adjacent chambers in the form of a communication port in the dividing wall between adjacent chambers and a chamber outlet in conjunction with a perforated plate and the outlet is positioned in fluid communication with the final chamber.

A rotor for use in a slurry separation flotation cell having a tank within which the rotor is contained. The rotor has a shaft that has a conduit adapted to communicate a fluid, preferably a gas such as air, therethrough. The rotor also has impeller blades extending radially from the shaft and a baffle adjacent the bottom of the impeller blades. The baffle extends from an end of the shaft to at or near an outer edge of the impeller blades, directing the gas to the outer edges of the impeller blades for dispersion into the slurry. The rotor is located adjacent a floor of the tank and, in use, draws slurry downwards into the impeller portion and forces it outwards with the gas being mixed therein.

A flotation separation apparatus for separating particles in suspensions, feeds slurry containing the particles through an inlet into a contactor where gas is fed through an inlet to mix with the slurry, for example in a downwardly plunging jet, to form a gas-liquid bubbly two-phase mixture under pressure from an outlet restriction in a throttling duct. The mixture is passed through a flow manipulator configured to induce a high energy dissipation rate, for example by way of a Shockwave formed in a diverging section of the throttling duct reducing the size of the bubbles and brining those bubbles into intimate contact with particles in the mixture which is released into a separation cell where a flow manipulating draft tube is provided to reduce turbulence in the mixture. Alternative apparatus and methods for inducing the high energy dissipation rate and for reducing turbulence in the mixture are also described and claimed.

There is provided a filtration system comprising a reaction and separation apparatus (2) for processing a solid-liquid mixture (4) to separate solids from liquid, the reaction and separation apparatus (2) comprising: a tank (6) comprising an inlet (8) and an outlet (10), the inlet (8) configured for receiving the solid-liquid mixture (4) into the tank (6), the outlet (10) configured for permitting liquid to exit the tank (6); and a sedimentation device (16) including a liquid conduit (18), the liquid conduit (18) having a first end (20) and a second end (22), the first end (20) configured to be in liquid communication with the outlet (10), the second end (22) configured for dispensing liquid from the liquid conduit (18), wherein the second end (22) is positioned higher than the first end (20) so that the liquid conduit (18) extends from the first end (20) to the second end (22) along a vertical axis or along an inclined axis relative to the horizontal, wherein the filtration system further comprises a preparatory filter (642) configured to, in use, receive an inflow liquid (644) from an external source and separate the inflow liquid (644) into the solid-liquid mixture (4) and a filtered liquid (646), wherein the preparatory filter (642) is configured to dispense the solid-liquid mixture (4) into the tank (6) via the inlet (8).