The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1978
Filed:
Aug. 18, 1976
Abraham Ogman, Peabody, MA (US);
Avco Corporation, Wilmington, MA (US);
Abstract
This disclosure is directed to an apparatus and method for highly concentrating an already relatively concentrated feed stream in a two-stage freeze-crystallization system. The feed stream is introduced into the first stage freezer-crystallizer without prior dilution, which has heretofore been customary. Highly concentrated output is withdrawn from a first stage wash column. Diluted concentrate is recirculated in the second stage of the system. This relatively simple expedient of diluting in the second stage, rather than in the first, allows the system to treat highly contaminated feed streams directly and produces significant savings in energy for the same throughput.