| US 7,611,604 B2 | ||
| Method and device for the production of purified steam | ||
| Mauri Salmisuo, Tuusula (Finland); and Ilkka Olavi Laitinen, Gammelby (Finland) | ||
| Assigned to STERIS Europe Inc., Suomen Sivuliike (Finland) | ||
| Appl. No. 10/522,491 PCT Filed Aug. 28, 2003, PCT No. PCT/FI03/00630 § 371(c)(1), (2), (4) Date Oct. 06, 2005, PCT Pub. No. WO2004/020066, PCT Pub. Date Mar. 11, 2004. |
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| Claims priority of application No. 20021538 (FI), filed on Aug. 28, 2002. | ||
| Prior Publication US 2006/0102292 A1, May 18, 2006 | ||
| Int. Cl. B01D 1/06 (2006.01); B01D 1/22 (2006.01); C02F 1/08 (2006.01) | ||
| U.S. Cl. 159—49 [159/13.2; 159/44; 159/901; 159/27.1; 202/197; 202/236; 202/237; 202/238; 203/10; 203/40; 203/89; 203/DIG. 9] | 8 Claims |
| 1. A method for producing purified steam using a falling film evaporation tube unit, the method comprising the steps of:
a) introducing a feed stream of water to a falling film evaporation tube unit to produce a steam and a liquid;
b) collecting the liquid below a lower end of the falling film evaporation tube unit to form a volume of liquid;
c) circulating the steam upward in a spiraling rotational path;
d) separating droplets from the steam to form a first reject stream;
e) combining a portion of the volume of liquid with the feed stream to form a circulating liquid; and
f) removing a second reject stream from the circulating liquid.
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