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| Number | Title | Issue Date |
| 7794564 | Evaporation system A multistage evaporation system is proposed in which the first evaporator is heated via a jet wet washer with superheated, air-containing waste steam, for example of a drier. The product vapor of the first evaporator stage is fed via a mechanical compressor to a sec... | 09/14/2010 |
| 7438129 | Water treatment method for heavy oil production using calcium sulfate seed slurry evaporation A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. Feedwater is then acidified and steam stripped to remove alkalinity and dissolved non-condensable ga... | 10/21/2008 |
| 7428926 | Water treatment method for heavy oil production A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. Pretreated produced water is then fed to an evaporator. Up to 95% or more of the pretreated produced... | 09/30/2008 |
| 7150320 | Water treatment method for heavy oil production A process for treating produced water to generate high pressure steam. Produced water from heavy oil recovery operations is treated by first removing oil and grease. If necessary, the pH is then adjusted, normally downward, releasing at least some carbonate alkalini... | 12/19/2006 |
| 7097736 | Dairy wastewater treatment A process and apparatus for recycling dairy wastewater wherein the wastewater is supplied to at least one first evaporation apparatus to produce a water distillate and sludge. The sludge is then supplied to at least one second evaporation apparatus arranged in serie... | 08/29/2006 |
| 7077201 | Water treatment method for heavy oil production An evaporation based method of treating produced water from heavy oil production. A produced water from heavy oil recovery operations treated by first removing oil and grease to a desired level, preferably to about twenty parts per million, or less. If necessary, th... | 07/18/2006 |
| 6984292 | Water treatment process for thermal heavy oil recovery There is disclosed a method and apparatus for treating produced water from a heavy oil thermal recovery unit to achieve water recovery and recycle levels of greater than 80% and as high as 100% to achieve zero discharge criteria. The method includes the initial step... | 01/10/2006 |
| 6966974 | Process for evaporating a solution and an evaporator for use in the process The invention relates to a method for evaporating a solution and an evaporator applied to it. The evaporator (1) has parallel plate heat exchanger elements (3) fitted inside a jacket (2), consisting of a flexible plastic film, for example, and a... | 11/22/2005 |
| 6908533 | Rotating heat exchanger An evaporator and condenser unit for use in distilling a liquid, such as water, includes a rotary heat exchanger plate having a plurality of folds or pleats. Adjacent panels of the folded plate define spaces between their oppositely facing surfaces, and these spaces... | 06/21/2005 |
| 6906234 | Continuous method and heat pump device for enriching liquid low-concentrated reaction mixtures A continuous method and a heat pump device for enrichment of low-concentrated reaction mixtures resulting from the production of cycloalkanedienes by means of catalytic metathesis of cyclic aliphatic alkenes and cyclooligomers in organic reaction media with reduced ... | 06/14/2005 |
| 6846390 | Methods for using hydrophobic liquid to compress steam Methods for using a hydrophobic liquid, such as mineral oil, to compress steam include using a compressor to compress a mixture of steam and the hydrophobic liquid. One embodiment includes the steam to be compressed coming from a boiling aqueous solution in an evapo... | 01/25/2005 |
| 6846387 | Rotating fluid evaporator and condenser An evaporator and condenser unit for use in distilling a liquid, such as water, includes a rotary heat exchanger plate having a plurality of accordion-style folds, and having its two ends joined together so as to give the folded plate a generally circular form. The ... | 01/25/2005 |
| 6802941 | Distiller employing cyclical evaporation-surface wetting A distillation unit (10) employs a rotary heat exchanger (32) forming a multiplicity of evaporation chambers (56) into which a liquid to be purified is sprayed for evaporation. Spray arms (58) spray at a steady rate into all of the evapor... | 10/12/2004 |
| 6733636 | Water treatment method for heavy oil production A method of treating produced water from heavy oil production to provide feedwater for the production of high quality steam. A produced water from heavy oil recovery operations is initially treated by first removing oil and grease to a desired level, preferably to a... | 05/11/2004 |
| 6695951 | Saline/sewage water reclamation system The present water reclamation system includes a series of concentric thin shells. The shells mount within a housing that can be maintained under vacuum or low pressure. The shells rotate at high velocity. Contaminated liquid from outside the housing is in... | 02/24/2004 |
| 6689251 | Cycled-concentration distiller A distiller (10) that employs a rotary heat exchanger (32) introduces water to be evaporated into evaporation chambers (56). During most of its operation, it collects the water that has passed through the evaporation chamber (56) without evaporating, and ... | 02/10/2004 |
| 6551466 | Multiple effect distillation process with reduced fouling A method and apparatus for removing a contaminant from a fluid feed stream containing the contaminant. The method includes the steps of providing a feed stream and heating it in a first step to at least partially remove some of the contaminants and recove... | 04/22/2003 |
| 6436242 | Device and method for distilling water A water distiller has a sub-atmospheric boiler having a non-recirculating brine section, an input, a brine output and a vapor output. The input is for water to be distilled, the brine output for brine, and the vapor output for water vapor. A compressor is... | 08/20/2002 |
| 6375803 | Mechanical vapor recompression separation process A method and apparatus for removing a contaminant from a fluid feed stream containing the contaminant. The method includes the steps of providing a feed stream (10) and heating it in a first step (18) to at least partially remove some of the contaminants ... | 04/23/2002 |
| 6365005 | Apparatus and method for vapor compression distillation An improved design of a vapor compression distiller which makes use of a rapid, highly turbulent flow through the heat-of-evaporation recovery, or primary, heat exchanger. The distiller may also include the use of turbulators to increase turbulence and mi... | 04/02/2002 |
| 6355145 | Distillation process with reduced fouling A method for removing a contaminant from a fluid feed stream containing the contaminant. The method includes the steps of providing a feed stream and heating it in a first step to at least partially remove some of the contaminants and recover energy from ... | 03/12/2002 |
| 6217711 | Method of treating condensates A method of treating cellulose pulp mill condensates having an MeOH content using an evaporator and a steam stripper having a reboiler, comprising: (a) Collecting a feed liquor stream having at least 50% of the pulp mill MeOH. (b) Feeding the feed liquor ... | 04/17/2001 |
| 6132555 | Method and arrangement for increasing evaporation capacity of a multi-stage evaporator of spent liquor in a pulp mill A method and arrangement for increasing evaporation capacity in a multi-stage evaporation plant of spent liquor of a pulp mill. The method includes increasing the pressure of vapor discharged from an evaporation stage by a separate booster, and supplying ... | 10/17/2000 |
| 5968321 | Vapor compression distillation system and method Distillation system having an evaporator/condenser core with heat transfer plates welded together along their edges to form alternate boiling and condensing chambers. Feed liquid is supplied to the boiling chambers through a pair of heat exchangers which ... | 10/19/1999 |
| 5944950 | Process for the final evaporation of black liquor The process for the final evaporation has at least two evaporation appliances. These appliances are coupled in series with respect to the black liquor and in parallel with the live steam (primary steam), which drives the evaporation, and with the secondar... | 08/31/1999 |
| 5925223 | Process for improving thermal efficiency while producing power and desalinating water A process and apparatus for improving the thermal efficiency of a steam turbine power generating plant while simultaneously desalinating seawater or brine and purifying water which contains minerals, salts, and other dissolved solids. Exhaust gases from a... | 07/20/1999 |
| 5906714 | Method for treating emulsified liquids A method of separating water from an aqueous emulsion using a minimum of energy includes heating the aqueous emulsion in a sump, conveying concentrated emulsion from the sump to a heat exchanger so as to pass therethrough back to the sump, circulating wat... | 05/25/1999 |
| 5810976 | Device for processing water having high concentrations of scale forming compounds and high solids content in a high efficiency vapor compression distillation system A device for processing water having high concentrations of scale forming compounds and high solids content in a high efficiency vapor compression distillation system wherein a plate-in-frame heat exchanger is submerged in a boiling solution contained in ... | 09/22/1998 |
| 5810975 | Apparatus for extracting solid residue from a fluid by evaporation An apparatus for extracting solid residues from an aqueous slurry. The slurry is applied to the upper surfaces of disks that rotate in a hollow cylindrical vessel so that an evaporation enclosure is defined by the vessel and at least in part by the upper ... | 09/22/1998 |
| 5770020 | Distillation apparatus The invention relates to a distillation apparatus (1) which is suitable in particular for the distillation of sea water into fresh water. The apparatus includes a plurality of flat, bag-like elements (3) formed from a thin film material such as plastic fi... | 06/23/1998 |
| 5738761 | Sewage treatment process and apparatus A waste water treatment system includes a preliminary first stage separator for separating an aqueous phase from other materials. A pressure vessel sedimentation follows for removing most of the remaining solids from the waste material. The liquid and a m... | 04/14/1998 |
| 5645694 | Process and apparatus for vapor compression distillation An improved vapor compression distillation process and apparatus are provided having a container with a substantially horizontal longitudinal center axis, two opposing end plates closing each end of the container, a first and second passage area defined w... | 07/08/1997 |
| 5599429 | Water distillation system The water distillation system according to the invention recaptures and utilizes the inherent heat of transformation in converting from the vapor to the liquid states. The water distillation system efficiently removes volatile gases and impurities from th... | 02/04/1997 |
| 5597453 | Apparatus and method for vapor compression distillation device A vapor compression distillation/product concentration device includes an evaporator/condenser core, with alternating boiling and condensing chambers with edge manifolds such that substantially the entirety of each plate surface is used as a heat transfer... | 01/28/1997 |
| 5591310 | Distillation An apparatus for distillation of a liquid near or above its critical point wherein the liquid contains a dissolved solid. The apparatus includes a separation section wherein the liquid may be separated into a vapor and a liquid residue separated by a liqu... | 01/07/1997 |
| 5587054 | Vapor compression distillation system A vapor compression distillation system including a boiler/condenser assembly wherein a portion of the condensate is redirected back to the condenser inlet to extract superheat from the compressed vapor and transfer it to the liquid in the boiler. The vap... | 12/24/1996 |
| 5575889 | Rotating falling film evaporator Heating elements having internal spaces for a heating medium such as steam are successively submerged and withdrawn from a bath of liquid to be evaporated. Vapor boiling off the outer surfaces of the heating elements can be returned for use as heating med... | 11/19/1996 |
| 5512141 | Distillation apparatus The invention relates to a distillation apparatus (1) which is suitable in particular for the distillation of sea water into fresh water. The apparatus comprises a plurality of flat, bag-like elements (3) formed from a thin film material such as plastic f... | 04/30/1996 |
| 5248387 | Process for producing concentrated aqueous slurries and spray dried particulate products An improved process and apparatus for producing concentrated kaolin slurries and spray dried kaolin particulates through the use of an arrangement where an evaporation system for producing concentrated slurries is coupled with a spray dryer such that off ... | 09/28/1993 |
| 5232557 | Heat transfer plates evaporation and condensation apparatus In a plate heat exchanger for evaporation of a liquid by means of a heat emitting vapor every second plate interspace forms an evaporation passage (28) and the rest of the plate interspaces form condensation passages (30). Aligned openings (16) in the pla... | 08/03/1993 |
