The invention relates first of all to a method for removal of clarified liquid from a liquid basin (N), such as a clarification basin or like, with an apparatus, by means of which clarified liquid is being removed by using a liquid exhaust arrangement (2) and a collecting arrangement coupled therewith. The liquid exhaust arrangement comprises one or more exhaust passages (2a1), existing beneath surface (y) of the liquid basin one after another in longitudinal direction (s) of the liquid basin and comprising a profile with an essentially closed cross section, such as a pipe, channel or like, each passage having a perforation (R) to make possible flow of liquid inside the same. Functioning of the liquid exhaust arrangement is being controlled according to the circumstances, such as due to surface alteration in the liquid basin, by adjusting the amount of liquid to be removed by the exhaust passage (2a1) by changing a flow cross section area beneath the surface (y) of the liquid basin of an open overflow edge (2a2y) of exhaust organs (2a2), being coupled with the perforation (R) in the exhaust passage and having a cross section expanding towards outer end thereof, which is carried out by turning (w) the exhaust organs (2a2) with respect to longitudinal axis (p1) of the exhaust passage (2a1). The invention also relates to an apparatus operating according to the method.

The invention relates first of all to a method for removal of clarified liquid from a liquid basin (N), such as a clarification basin or like, with an apparatus, by means of which clarified liquid is being removed by using a liquid exhaust arrangement (2) and a collecting arrangement coupled therewith. The liquid exhaust arrangement comprises one or more exhaust passages (2a1), existing beneath surface (y) of the liquid basin one after another in longitudinal direction (s) of the liquid basin and comprising a profile with an essentially closed cross section, such as a pipe, channel or like, each passage having a perforation (R) to make possible flow of liquid inside the same. Functioning of the liquid exhaust arrangement is being controlled according to the circumstances, such as due to surface alteration in the liquid basin, by adjusting the amount of liquid to be removed by the exhaust passage (2a1) by changing a flow cross section area beneath the surface (y) of the liquid basin of an open overflow edge (2a2y) of exhaust organs (2a2), being coupled with the perforation (R) in the exhaust passage and having a cross section expanding towards outer end thereof, which is carried out by turning (w) the exhaust organs (2a2) with respect to longitudinal axis (p1) of the exhaust passage (2a1). The invention also relates to an apparatus operating according to the method.

A remote submerged chain conveyor system separates particles from a coal ash/water slurry from remotely located boiler units. A tank forms an ash holding section, a dewatering section, and an ash settling section. The ash holding section receives the slurry with first and second opposite ends. The dewatering section dewaters the slurry. The settling zone is an elongated trough connected with the ash holding section at one end with a discharge drain trough at near an opposite end. The tank sections are in a generally linear arrangement. A drag chain moves along the ash settling conveying the particles settling from the slurry to the dewatering section opposite to a net flow of water. A flocculant supply line upstream of the ash settling section configured for adding a flocculant promoting an agglomeration of particles into flocs. The flocculant supply line is located in a mixing section with an agitator.

A remote submerged chain conveyor system separates particles from a coal ash/water slurry from remotely located boiler units. A tank forms an ash holding section, a dewatering section, and an ash settling section. The ash holding section receives the slurry with first and second opposite ends. The dewatering section dewaters the slurry. The settling zone is an elongated trough connected with the ash holding section at one end with a discharge drain trough at near an opposite end. The tank sections are in a generally linear arrangement. A drag chain moves along the ash settling conveying the particles settling from the slurry to the dewatering section opposite to a net flow of water. A flocculant supply line upstream of the ash settling section configured for adding a flocculant promoting an agglomeration of particles into flocs. The flocculant supply line is located in a mixing section with an agitator.

The disclosed Hydro-Gravitational Trap (HGT) method and apparatus separate a suspension into two flow streams, discriminating particles based on a designated particle settling velocity: one Designated Particle Concentrated (DPC) and one Designated Particle Diluted (DPD). The HGT confines particles between a controlled upward hydrodynamic field and the downward net gravitational field within the apparatus’s High-Energy Segment (HES), awaiting removal. The HES typically contains an internal agitator conforming to its divergent shape. Agitator motion prevents trapped particles from adhering to the HES, provides flocculation energy, and mixes the contents, controlling the DPC flow stream concentration. The agitator can also simultaneously function as a control valve or an actuator regulating this flow in some preferred embodiments. Designated particles remain trapped in the HES until removed with the DPC flow stream while the DPD flow stream advects upward, exiting the apparatus through the top of the Low-Energy.sup.1 Segment (LES).

The invention relates to a method for clarification of raw green liquor in a sedimentation tank. According to the invention is a part of dregs separated in the sedimentation tank recirculated back into the inflow of raw green liquor, and preferably after passing the dregs through at least one turbulence generator (30, 31) that could break up larger dregs particles into smaller dregs particles, and thus create larger total surface on the dregs particles, improving sedimentation rate in the sedimentation tank. In a preferred embodiment is the recirculated dregs added into the flow of raw green liquor before a flocculant is added into the flow of raw green liquor and mixed recirculated dregs.

An electro-separation apparatus for separation of drilling fluids is provided. The apparatus can include a reaction chamber and a set of electrode plates provided in the reaction chamber. A sediment outlet can be provided near a bottom of the reaction chamber and wiper blades can be provided for sweeping sediment that has collected on the electrode plates towards the sediment outlet.

An electro-separation apparatus for separation of drilling fluids is provided. The apparatus can include a reaction chamber and a set of electrode plates provided in the reaction chamber. A sediment outlet can be provided near a bottom of the reaction chamber and wiper blades can be provided for sweeping sediment that has collected on the electrode plates towards the sediment outlet.

The present disclosure provides apparatus, systems, and methods for improving slop water treatment efficiency. The method generally includes separating contaminated fluid into a clean fluid layer and one or more contaminant layers floating on a surface of the clean fluid layer in a vessel; reporting to a control unit, a location, sensed by level sensor(s), of an interface between the clean fluid layer and the contaminant layer(s); reporting to the control unit, a height, sensed by a first position sensor, of a skimmer relative to the vessel; adjusting, using the control unit and based on the reported location of the interface and/or the reported height of the skimmer, the height of the skimmer so that one or more components of the skimmer are positioned proximate the sensed location of the interface; and skimming, using the skimmer, the contaminant layer(s) off of the clean fluid layer proximate the sensed interface.

The present disclosure provides apparatus, systems, and methods for improving slop water treatment efficiency. The method generally includes separating contaminated fluid into a clean fluid layer and one or more contaminant layers floating on a surface of the clean fluid layer in a vessel; reporting to a control unit, a location, sensed by level sensor(s), of an interface between the clean fluid layer and the contaminant layer(s); reporting to the control unit, a height, sensed by a first position sensor, of a skimmer relative to the vessel; adjusting, using the control unit and based on the reported location of the interface and/or the reported height of the skimmer, the height of the skimmer so that one or more components of the skimmer are positioned proximate the sensed location of the interface; and skimming, using the skimmer, the contaminant layer(s) off of the clean fluid layer proximate the sensed interface.