Abstract:
An improved continuous process and apparatus for treating an impure liquid to produce purified liquid, particularly, water, the process having an electrically activating a thermoelectric module to provide a first heated surface and a cooler surface; feeding the impure liquid to the first heated surface to produce vapour of the liquid; and transferring the vapour to the cooler surface to effect heat transfer to the cooler surface, the improvement being directing a minor portion of the vapour to the cooler surface to maintain the cooler surface at a temperature at or near the boiling point of the liquid; and transferring a major portion of the vapour to a condenser remote from the module to effect heat transfer and condensation of the vapour to produce the purified liquid and collecting the purified liquid from the condenser. The process is continuous in that it does not need to be intermittently stopped, or require auxiliary cooling of the module. Preferably, the heat from the condenser is transferred to pre-heat the impure liquid feed.
Abstract:
A rotary evaporator is described utilizing a magnetically driven fluorocarbon cylinder, operating within a solvent container, to create a thin solvent film for rapid evaporation without the usual requirement for rotating the entire solvent container assembly. Infra-red heating is employed for efficient evaporation rates. Solvent heating is controlled during evaporation by a single temperature probe, turning the infra-red heater on and off on demand of the probe. Over heating of the product is prevented by maintaining a solvent residue at or near the conclusion of an evaporation.
Abstract:
A corrosive liquid such as sulphuric acid is concentrated by boiling in an evaporator vessel having a thermosyphon loop connected to the bottom of the vessel. Electrodes of carbon which is essentially free of any organic binders are located in one leg of the thermosyphon loop to heat the liquid by current conducted through the liquid. The electrodes are located well below the liquid surface so that boiling occurs only above the electrode level, reducing erosion of the electrodes. The electrodes are blanketed with air which flows through the porous carbon into the liquid, thereby protecting the seals and electrode connections and also introducing air into the thermosyphon loop to promote circulation of the liquid in the loop.
Abstract:
A method for continuously reclaiming used active carbon particles by application of an electrical current to electrodes having a plurality of apertures of a defined size and which are vertically spaced in a vertical column through which the used particles flow downwardly, filling the space between the electrodes.
Abstract:
A distillation system comprising: a vaporizing kettle; an auxiliary pressurizing boiler connected at its input to the output of the kettle; a condenser heat exchanger connected at its input to the output of the boiler and having a plurality of spaced taps from which distillate can be removed; supplementary cooling tower in circulating flow relationship with the exchanger; a like plurality of distillate storage vessels; and means connecting each tap to the input of the corresponding vessel.
Abstract:
An apparatus for electrolytic heating of corrosive and other electrically conductive liquids comprises a plurality of electrically insulating shapes, such as stoneware Raschig rings, disposed between two or more electrodes. The insulating shapes are packed within a non-conductive tower and means are provided for irrigating the shapes with the liquid to be heated so that the liquid flows in a relatively thin film over the insulating shapes to provide a conductive path between the electrodes. The effective surface area of the electrodes is increased by placing between each electrode and the insulating shapes a mass of electrically conductive shapes, such as carbon Raschig rings. An overflow pipe is provided at the bottom of the tower so that the tower is maintained substantially empty of liquid.