US2014318748A1PendingUtilityA1

Spiral heat exchanger with anti-fouling properties

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Assignee: ALFA LAVAL CORP ABPriority: Nov 28, 2011Filed: Nov 28, 2012Published: Oct 30, 2014
Est. expiryNov 28, 2031(~5.3 yrs left)· nominal 20-yr term from priority
Inventors:Tobias SvenssonJonas AnehamreMats Nilsson
C09D 5/1675F28F 21/00F28F 19/04F28D 9/04C09D 183/04
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Claims

Abstract

The invention relates to a spiral heat exchanger comprising a spiral body formed by at least one spiral sheet wound to form the spiral body forming at least a first spiral-shaped flow channel for a first medium and a second spiral-shaped flow channel for a second medium, wherein the spiral body is enclosed by a substantially cylindrical shell being provided with connecting elements communicating with the first flow channel and the second flow channel. At least a part of the spiral heat exchanger is provided with a coating comprising silicon oxide, SiO x .

Claims

exact text as granted — not AI-modified
1 . A spiral heat exchanger comprising a spiral body formed by at least one spiral sheet wound to form the spiral body forming at least a first spiral-shaped flow channel for a first medium and a second spiral-shaped flow channel for a second medium, wherein the spiral body is enclosed by a substantially cylindrical shell being provided with connecting elements communicating with the first flow channel and the second flow channel wherein
 the spiral heat exchanger is provided with a coating comprising silicon oxide, SiO x , having an atomic ratio of O/Si>1, a content of carbon ≧10 atomic % and a coating layer thickness of about 5-60 μm, which coating was prepared by sol-gel processing and applied to at least a part of the sheets.   
     
     
         2 . A spiral heat exchanger according to  claim 1 , wherein the sheets have a thickness of 2-6 mm. 
     
     
         3 . A spiral heat exchanger according to  claim 1 , wherein the layer thickness of said coating on the sheets is 5-30 μm. 
     
     
         4 . A spiral heat exchanger according to  claim 1 , wherein the coating comprising silicon oxide, SiO x , has an atomic ratio of O/Si≧1.5.3. 
     
     
         5 . A spiral heat exchanger according to  claim 1 , wherein the composition has a content of carbon ≧20-60 atomic %. 
     
     
         6 . A spiral heat exchanger according to  claim 1 , wherein the layer thickness of said coating on the sheets is 2-20 μm. 
     
     
         7 . A spiral heat exchanger according  claim 1 , wherein the coating comprising silicon oxide, SiO x , has an atomic ratio of O/Si≧2-2.5. 
     
     
         8 . A spiral heat exchanger according to  claim 1 , wherein the composition has a content of carbon ≧30-40 atomic %.

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