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:
Apr. 20, 1982
Filed:
Jul. 21, 1980
Gerhard Proske, Butzbach, DE;
Rolf Van der Piepen, Butzbach, DE;
Hans-Joachim Bittner, Butzbach, DE;
Luwa AG, Zurich, CH;
Abstract
In a vessel (1), several mutually parallel evaporator tubes (2) are arranged which, on their outside, are surrounded by heating steam introduced into the interior (1a) of the vessel. A coaxial displacement body (3) is arranged in the interior of the evaporator tubes (2). A gap (5) is formed between the displacement body (103) and the surrounding evaporator tube (2). The displacement bodies (3) are fixed to a bottom (6) which is demountably joined to the vessel (1). The displacement bodies (3) can be removed by removing the bottom (6). The pre-evaporated product, introduced from below and leaving the evaporator tubes (2) at the top, is passed to a vapor-release vessel (11) in which a separation of vapors and concentrate takes place. Each displacement body (3) is formed by a rifled tube which has been provided by deformation with at least one spirally running recess (4). The product flows through both the gap (5) and this recess (4). A whirling motion which entails an increase in turbulence is thus imparted to the product stream. Since the outside of each displacement body (3) is formed by surfaces with steady mutual transitions, no dead zones favoring deposition are present. The risk of fouling is therefore low so that the evaporator is also suitable for the treatment of salt-containing liquids. The high turbulence which can be achieved also makes this evaporator suitable for the treatment of intrinsically viscous or thixotropic products.