A method for cleaning oily waste including water, solids and at least one fuel oil includes removing water from the oily waste to be cleaned so as to produce dried oily waste; introducing dried oily waste into a two-phase centrifugal separator through a liquid inlet; separating the dried oily waste in the two-phase centrifugal separator into a cleaned oil phase and a sludge phase; discharging the sludge phase through a sludge outlet of the two-phase centrifugal separator, and discharging the cleaned oil phase through a liquid outlet of the two-phase centrifugal separator. A system for cleaning oily waste including water, solids and at least one fuel oil is also disclosed.

A process for removing volatile diluent(s) from processed solids, generated from unstabilized drilling waste being washed in a diluent/solvent wash process. The process describes the use of hot water to deliver quality heat energy to the processed solids phase, evaporating the diluent and at least partially removing chlorides or other soluble or insoluble contaminants in the process, resulting in enhanced efficiency of diluent and contaminant recovery, for example, as a result of the near infinite surface area of water, among other things.

Selective scaling in water treatment systems in which desalination is performed is generally described. According to certain embodiments, the location of the formation of solid scale within a water treatment system is controlled by adjusting one or more system parameters, such as the temperature and/or flow velocity of a saline stream within the water treatment system.

The present invention relates to water purification using solar energy. More specifically, systems and methods according to the present invention collect solar energy to heat non-potable water in a super-insulated structure. Compressed heated air is injected to evaporate water vapor out of brackish water, saltwater, or dirty water, thereby creating saturated air. The saturated air is drawn through a cooling tower and distilled water is precipitated. The systems and methods employ heat recovery and recycling processes to maximize energy efficiency.

A wastewater treatment system includes a circulating fluidized bed evaporator defining a longitudinal axis vertical with respect to gravity. The evaporator has a wastewater inlet to provide wastewater to the circulating fluidized bed evaporator. A heat inlet is axially below the wastewater inlet to provide heat to the circulating fluidized bed evaporator for evaporating the wastewater. An outlet is axially above the wastewater inlet and the heat inlet.

An apparatus capable of heating a liquid may provide a valve assembly configured to receive an incoming liquid from a bulk source. The valve assembly may control the flow of the liquid to a source vessel via a pipe system. The pipe system includes a first pipe directly connected to the valve assembly and a second pipe downstream from the first pipe and connected between the first pipe and the source valve. The second pipe is heated with a heating system that surrounds the second pipe, and the second pipe has a larger diameter than that of the first pipe.

Apparatus for obtaining potable water from an impure water source comprising a container having at least a first end wall, a second end wall, a first sidewall, a second sidewall and a top wall; a volume of the impure water; a heater device for heating the volume of impure water to produce gaseous water molecules; a condensing system located inside the container for providing water condensate from the water molecules; an outlet for providing a flow of potable water from the water condensate; and a collection device for collecting the water condensate and moving the water condensate towards the outlet.

Disclosed is a method of regenerating a phosphoric acid solution from a treatment liquid including silicon (Si), hydrogen fluoride (HF), and phosphoric acid, the method including removing the silicon by supplying hydrogen fluoride corresponding to a preset amount or more to the treatment liquid, removing the hydrogen fluoride by heating the treatment liquid to a boiling point of hydrogen fluoride or higher, and adjusting a temperature and a concentration of the phosphoric acid to preset values.

A method for removing carbon dioxide from a carrier liquid is disclosed. A heat exchanger is provided. A carrier liquid, containing carbon dioxide, is heated through the heat exchanger, causing the carbon dioxide to vaporize. The carrier liquid and the carbon dioxide gas pass to a liquid removal vessel. The carrier liquid is removed and the carbon dioxide gas is compressed. The compressed carbon dioxide gas is provided to the heat exchanger, cooling the carbon dioxide gas opposite the carrier liquid, producing a carbon dioxide liquid.

The solar cooling and water desalination system is a roof-mounted system having a refrigeration unit driven by electricity produced by solar panels to chill water, which is stored in a first tank and used to cool living spaces. Seawater is preheated in a first heat exchanger by waste heat from operation of the refrigeration unit, and heated further in a second heat exchanger by hot distilled water. A field of solar collectors heats oil, which is stored in a hot oil tank and then powers a first boiler to produce high pressure and temperature steam for a steam ejector vacuum system connected to a desalination water boiler that desalinates the seawater, which is condensed by a condenser and stored in a distilled water tank, where it is stored at about 80 C.