A de-watering system for liquid industrial waste from an industrial cleaning process is provided. The liquid industrial waste has an initial water content, and comprises detergents and solid waste. A de-watering bed (430) holds the liquid industrial waste. Air in a first zone (420) is enclosed by a transparent structure (410) and is heated by the sun during daytime. A first controllable opening (450) controls a rate of flow of air in the first zone (420). Water from the liquid industrial waste evaporates into heated air in the first zone (420). An air removal conduit (440) allows heated air to vent to the atmosphere. A control system (380) selectively opens the first controllable opening (450), to regulate the flow of air. De-watering continues until a selectable end point, based on residual water content of the waste, or a final concentration of non-water components.

A system and a method for separating water and salt by sequential evaporation of multiple groups of heat collecting devices. The system comprises heat collectors, a light-gathering heat collector, a heating chamber, an evaporation chamber, a condenser, a buffer chamber and a vacuum pump; a saline water stock solution is rapidly heated by multiple series-connected-multiple groups of parallel solar heat collecting devices and series-connected light-gathering heat collectors with decreasing water levels, and the water levels control water inlet and the temperature controls water outlet; several groups are started up in turn to perform micro-negative pressure evaporation, while other groups provide phase change heat energy, and the buffer chamber collects concentrated saline water; natural convection heat exchange occurs between the saline water stock solution and a vapor manifold, vapor heat energy is recovered and condensed fresh water is produced.

Processes and systems suitable for purifying or otherwise treating liquids to remove contaminants therein, including but not limited to contaminated water, to permit reclaiming, recycling, and reuse of the liquids. Such a process and system entails the use of a cascading distillation system that evaporates a liquid from the feedstock and then condenses and collects a more purified form of the liquid. The cascading distillation system can be operated to selectively process the feedstock through any of a series of vessels at which different amounts and/or contaminants may be removed from the feedstock.

In at least one embodiment, a process of forming a polymer includes supplying a feed having one or more olefin monomers and a solvent; contacting the feed with a catalyst to form a reaction mixture; treating the reaction mixture in a first separator to form a first polymer-rich mixture; introducing the first polymer-rich mixture into a second separator; introducing a volatile component and/or inert component into the first separator, the second separator and/or a line between the first separator and the second separator; treating the first polymer-rich mixture to form a second polymer-rich mixture; and devolatilizing the second polymer-rich mixture to obtain the polymer.

A method for purifying water involves heating impure water in a first reboiler, a second reboiler and a combustion steam generator to ultimately produce about 3 parts by weight of clean water and about 1 part by weight of clean steam for every 4 parts by weight of the impure water. A water treatment system includes a gas-fired combustion steam generator that is operable to produce a hot steam stream. A reboiler is connected in receiving communication with the gas-fired combustion steam generator to receive the hot steam stream. A separator is connected with the reboiler and is operable to separate an output stream from the reboiler.

Embodiments pertain to a urea plant and to the operation of a urea plant in a reduced load mode. In embodiments, two evaporators in parallel are used, connected to a finishing section respectively to a melamine plant.

The present disclosure is drawn to an example evaporation panel, which can include an evaporation shelf that is laterally elongated and horizontally oriented and can include an upper surface and a lower surface. A second evaporation shelf can also be included that is laterally elongated and positioned in parallel beneath the evaporation shelf. The second evaporation shelf can have a second upper surface. The evaporation panel can further include a support column between the first evaporation shelf and the second evaporation shelf. The support column can include a plurality of stacked and spaced apart evaporation fins oriented in parallel with the evaporation shelf.

The present disclosure evaporation panel systems including a plurality of evaporation panels. The evaporation panels can include a plurality of evaporation shelves that are laterally elongated, vertically stacked, spaced apart from one another, and horizontally oriented; and a plurality of vertical support columns positioned laterally along the plurality of evaporation shelves to provide support and separation to the plurality of evaporation shelves. The evaporation panels can also include a plurality of female-receiving openings which are individually bordered by two evaporation shelves and two support columns; and a plurality of male connectors positioned at lateral ends of both the first evaporation panel and the second evaporation panels. The first evaporation panel and the second evaporation panel can be orthogonally connectable via the male connectors of the first evaporation panel and the female-receiving openings of the second evaporation panel.

Evaporation panel securing system can include first and second evaporation panels, and a security fastener to secure a male connector (first evaporation panel) within a female-receiving opening (second evaporation panel) in an orthogonally joined orientation, for example. The evaporation panels can include a plurality of evaporation shelves that are laterally elongated, vertically stacked, spaced apart from one another, and horizontally oriented; a plurality of vertical support columns positioned laterally along the plurality of evaporation shelves to provide support and separation to the plurality of evaporation shelves; a plurality of female-receiving openings individually bordered by two evaporation shelves and two support columns; and a plurality of male connectors positioned laterally at ends of the plurality of evaporation panels, wherein the male connectors of the first evaporation panel are releasably joinable with female-receiving openings of the second evaporation panel.

A wastewater evaporative separation system can include an evaporation panel assembly and a wastewater delivery system. The evaporative panel assembly can include at least 10 individual evaporation panels laterally joined together and fluidly coupled to a body of wastewater. The evaporation panel assembly can be configured for receiving wastewater from the body of wastewater and evaporating water therefrom as the wastewater cascades down the evaporation panel assembly and contaminants generally become more concentrated. The wastewater delivery system can be associated with the body of wastewater and can include a fluid directing assembly delivering wastewater from the body of wastewater to an upper portion of the evaporation panel assembly.