A froth coalescing device comprises a froth receiving chamber with a vent and an umbrella valve arranged between the vent and a gas out port. The vent may be arranged to vent gas in a direction different from a direction of travel of froth in the receiving chamber.

An oil filtration system for purifying oil present in a reservoir. The system includes an inlet for receiving an inlet flow of contaminated oil from said reservoir, an outlet for releasing an outlet flow of purified oil to said reservoir, a vacuum housing in fluid communication with the inlet and the outlet, where the vacuum housing comprises an oil filter arranged in-side said housing, a first pumping unit which is arranged upstream of the vacuum housing, a second pumping unit which is arranged downstream of the vacuum housing, and a vacuum-generating means which is connected to the vacuum housing via a pumping tube, where the pumping flow rate of said second pumping unit is higher than the pumping flow rate of said first pumping unit.

An oil filtration system for purifying oil present in a reservoir. The system includes an inlet for receiving an inlet flow of contaminated oil from said reservoir, an outlet for releasing an outlet flow of purified oil to said reservoir, a vacuum housing in fluid communication with the inlet and the outlet, where the vacuum housing comprises an oil filter arranged in-side said housing, a first pumping unit which is arranged upstream of the vacuum housing, a second pumping unit which is arranged downstream of the vacuum housing, and a vacuum-generating means which is connected to the vacuum housing via a pumping tube, where the pumping flow rate of said second pumping unit is higher than the pumping flow rate of said first pumping unit.

Methods and apparatuses are provided for deaeration of a liquid. Liquid may be impinged onto an inclined baffle and forced through a first plurality of apertures that direct the liquid in one or more directions away from one or more outlets of a reservoir. The liquid may be passed through a second plurality of apertures. Flowing the liquid as described promotes a circuitous route of travel and provides a residence time inside of the reservoir that promotes release of entrained air.

Separation columns and methods for PFAS removal from water resources. Each column comprises perforated trays, level-controlled gates and air spargers placed on the top of each tray. Air bubbles of optimum size injected on the surface of each tray rise to the top of each tray, separating PFAS, thus creating a PFAS-enriched foam at the top. The amount of air or other gas injected at each stage of the column is optimally determined to increase the gas-water contact time and decrease enriched foam production. The foam is collected from the surface and undergoes a simple low-pressure evaporation process to break the bubbles. Multi-stage air injection using a sparger or distributer to inject air or other gas bubbles in each tray produces higher turbulence on each tray and more fresh and small bubbles of controlled size along the column height, thus enhancing contaminant removal and reducing operating costs.

An agitator or mixer installed in a solid-liquid-gas/slurry reactor in which gas removal from the slurry and foam destruction is promoted. The reaction mixer includes a vessel and an agitator assembly. The vessel is for containing the solid-liquid-gas mixture and defines two mixing zones within a given volume; a first mixing zone and a second mixing zone located above the first mixing zone. The agitator assembly is positionable within the vessel and comprises a rotatable shaft and a first and second impeller coupled to the shaft. The first axial impeller is locatable within the first mixing zone and is configured to pump the liquid in a downward direction along a vertical axis of rotation. The second impeller is locatable within the second fluxing zone and is configured to pump the liquid in an upward direction along the vertical axis of rotation.

A method for producing a sealant includes a weighing and mixing step, a kneading step, a stirring and defoaming step, and a filling step. In the weighing and mixing step, a main component and a curing agent are weighed and mixed together. In the kneading step, the mixture mixed in the weighing and mixing step is kneaded. In the stirring and defoaming step, the kneaded product kneaded in the kneading step is stirred and defoamed. In the filling step, the kneaded product defoamed in the stirring and defoaming step is filled into a container. In the stirring and defoaming step, the kneaded product is stirred under a condition wherein a stirring rotational speed at which the kneaded product is stirred and a stirring time for which the kneaded product is stirred are within a range from an arithmetic product lower limit value to an arithmetic product upper limit value.

A system for dispensing a liquid includes a filter adapted to filter a liquid and to provide a filtered liquid at a liquid outlet of the filter, and a tank having a liquid inlet coupled to the liquid outlet of the filter via a first pipe. The tank includes an upper portion having a first lateral dimension and a lower portion having a second lateral dimension less than the first lateral dimension. The upper portion of the tank is above the liquid inlet of the tank.

A system for dispensing a liquid includes a filter adapted to filter a liquid and to provide a filtered liquid at a liquid outlet of the filter, and a tank having a liquid inlet coupled to the liquid outlet of the filter via a first pipe. The tank includes an upper portion having a first lateral dimension and a lower portion having a second lateral dimension less than the first lateral dimension. The upper portion of the tank is above the liquid inlet of the tank.

A laboratory device, in particular a rotary evaporator, serves for evaporating a substance, preferably under reduced pressure, and comprises an evaporation flask for receiving the substance to be evaporated, a condenser for condensing the evaporated substance and a vapor passage for passing through the evaporated substance, which vapor passage is arranged in a vapor path between the evaporation flask and the condenser. The laboratory device further comprises a detection unit for foam detection, which detection unit is provided outside of the vapor passage and/or the evaporation flask.