Cycled-concentration distiller
Patent 6689251 Issued on February 10, 2004. Estimated Expiration Date: 
January 18, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 18, 2021. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 764707 filed on 01/18/2001US Classes:202/172, Plural159/4.3, Rotary drum with sprayer159/6.1, Centrifugal159/24.1, Regenerative159/44, Automatic202/182, With vapor-treating devices202/236, Spray forming and filming202/238, Rotary and/or tiltable203/23, Distillation residue as heat source203/24, Compressed vapor as heat source203/26, Compressed vapor as heat source203/71, PLURAL DISTILLATIONS PERFORMED ON SAME MATERIAL203/78, And returning distillation product to a previous distillation zone203/90, SPRAYING OF DISTILLAND INTO VAPORIZATION ZONE203/98AND RETURNING PRODUCT OF DISTILLATION STEP TO DISTILLATION ZONEExaminersPrimary: Tran, HienAssistant: Leung, Jennifer A. Attorney, Agent or FirmForeign Patent References
International ClassesB01D 003/00B01D 003/08 B01D 003/28 B01D 001/26 B01D 003/42 AbstractA 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 it reintroduces the thus-collected liquid back into the evaporation chamber, where it also adds a minor amount of unrecirculated feed liquid to make up for evaporation and concentrate removal. Simultaneously, a minor amount of feed liquid is fed into one side of a transfer pump (116). During this mode of operation, the impurities concentration in the recirculating liquid tends to increase as a result of the evaporation of pure water vapor. Periodically, the erstwhile recirculating liquid is redirected to the other side of the transfer pump (116), where it causes the feed liquid stored in the transfer pump's first side to be fed without accompanying recirculant liquid into the rotary heat exchanger's evaporation chambers. After a short time, the normal flow is restored, and the liquid from the rotary heat exchanger that had been redirected into the transfer pump's other side is discharged slowly as distiller concentrate. The resultant impurities concentration in the concentrate output can be as much as nearly twice the average impurities concentration experienced by the heat exchanger's evaporation-chamber surfaces.Other References
Field of SearchPluralSeries Multiple effect With vapor-treating devices Spray forming and filming Rotary and/or tiltable WITH MEASURING, TESTING OR INSPECTING Of concentration Compressed vapor as heat source Compressed vapor as heat source PLURAL DISTILLATIONS PERFORMED ON SAME MATERIAL SPRAYING OF DISTILLAND INTO VAPORIZATION ZONE AND RETURNING PRODUCT OF DISTILLATION STEP TO DISTILLATION ZONE Distillation residue as heat source And returning distillation product to a previous distillation zone Rotary drum with sprayer Centrifugal Regenerative Spraying FLUID FEED OR DISCHARGE DEVICES PROMOTING CIRCULATION Automatic | |
