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:
Mar. 02, 2010
Filed:
May. 14, 2004
Teppo Nurminen, Vantaa, FI;
Mauri Salmisuo, Tuusula, FI;
Teppo Nurminen, Vantaa, FI;
Mauri Salmisuo, Tuusula, FI;
STERIS Europe Inc. Suomen Sivuliike, Tuusula, FI;
Abstract
In a multi-effect falling-film evaporator, purified water for special purposes is produced. In each effect, a steam phase and a water phase is produced from the feed water. The steam phase is used for heating in the subsequent effect, whereby it condenses to product water, and the water phase becomes the feed stream for the subsequent effect. A reject stream is removed from the process to carry off impurities separated from the water. According to the invention, a reject stream is removed from each effect. Preferably, each reject stream is a condensed fraction of the steam generated in the respective effect.