Method and device for degassifying liquid

• US 4,469,495 A
• Filed: 03/18/1983
• Issued: 09/04/1984
• Est. Priority Date: 01/29/1983
• Status: Expired due to Term

• Current Assignee: ERMA CR Incorporation
• Original Assignee: ERMA Optical Works Limited
• Inventors: Shirato, Kozo, Kawashima, Kazuyasu, Hiraizumi, Kazuo
• Primary Examiner(s): Spitzer, Robert
• Application Number:
  US06/476,467
• Time in Patent Office: 536 Days
• Field of Search: 55/16, 55/36, 55/52, 55/55, 55/67, 55/158, 55/159, 55/189, 55/195, 210/650, 210/651, 210/194, 210/321.3, 210/450, 210/232
• US Class Current: 96/6
• CPC Class Codes: B01D 19/00 Degasification of liquids

Abstract

A degassifying apparatus for removing air or other dissolved gas from liquid comprises a degassifying tank placed under at least a partial vacuum. The apparatus also includes a coiled tube having a plurality of turns in a generally spiral configuration which is positioned within the tank. Spacer elements are positioned between adjacent coiled turns of the tube and/or between the tube and an inner wall of the tank to eliminate contact between the tube and the tank and to thereby maximize the total surface area of the tube which is exposed to the decompressed atmosphere within the tank. This provides a highly desirable and advantageous degassifying effect to the liquid being conducted through the tube.

Claims

1. Degassifying apparatus for removing dissolved gas from a liquid, said apparatus comprising:

(a) a degassifying enclosure placed under at least a partial vacuum;

(b) an elongated tube positioned within said enclosure and comprising means for conducting liquid therethrough, said tube being coiled in a substantially spiral configuration; and

(c) a plurality of spacer elements located adjacent to said coil tube in order to maximize contact between said tube and the atmosphere within said enclosure, said plurality of spacer elements including two planar plates, one of said planar plates being positioned between said coiled tube and a bottom wall of said enclosure, the other of said planar plates being positioned between said coiled tube and a top wall of said enclosure.

2. Degassifying apparatus in accordance with claim 1, wherein said enclosure comprises a tank.

3. Degassifying apparatus in accordance with claim 2, wherein said spacer element is positioned between said tube and said tank.

4. Degassifying apparatus in accordance with claim 3, wherein said tube is coiled into a plurality of turns and wherein a plurality of said spacer elements are positioned between said coiled turns.

5. Degassifying apparatus in accordance with claim 4, wherein said elongated tube is comprised of a synthetic resin material.

6. Degassifying apparatus in accordance with claim 4, further comprising at least one pair of exterior connecting pipes mounted onto said tank.

7. Degassifying apparatus in accordance with claim 6, comprising two pairs of said exterior connecting pipes mounted onto said tank.

8. Degassifying apparatus in accordance with claim 6, wherein said tube includes two opposite ends, each of said opposite ends being connected to one of said exterior connecting pipes.

9. Degassifying apparatus in accordance with claim 8, wherein the ends of said tube terminate in frustoconical inlet and outlet portions.

10. Degassifying apparatus in accordance with claim 9, further comprising a needle connector attached to each of said exterior pipes by a metal fastening element, whereby said needle connector is placed into fitted engagement with said inlet and outlet tube portions.

11. Degassifying apparatus in accordance with claim 10, wherein each fastening element has threads and is adapted to be screwed onto one end of an exterior connecting pipe.

12. Degassifying apparatus in accordance with claim 11, wherein each of said needle connectors includes a flange which engages a respective one of said metal fasteners.

13. Degassifying apparatus in accordance with claim 2, wherein said tank incorporates a boss portion to which at least one exterior connection pipe is adapted to be connected.

14. Degassifying apparatus in accordance with claim 2, further comprising a second coiled tube disposed within said enclosure, a spacer element being interposed between said two tubes.

15. Degassifying apparatus in accordance with claim 1, wherein said spacer element comprises foamed resin material.

16. Degassifying apparatus in accordance with claim 15, wherein said spacer element comprises a plurality of small foamed resin pieces positioned between adjacent coiled turns of said tube.

17. A degassifying apparatus for removing dissolved gas from a liquid, said apparatus comprising:

(a) a degassifying enclosure placed under at least a partial vacuum, said enclosure comprising a tank with at least one pair of connecting pipes mounted onto the exterior of said tank;

(b) an elongated tube positioned within said tank and comprising means for conducting liquid therethrough, said tube being coiled into a plurality of turns in a substantially spiral configuration and having two opposite ends, each of said ends being connected to a respective one of said connecting pipes, said tube ends terminating in frustoconical inlet and outlet portions, respectively, a needle connector being attached to each of said pipes by a metal fastening element, said needle connector being placed into fitted engagement with said inlet and outlet tube portions; and

(c) a plurality of spacer elements located adjacent to said coiled tube in order to maximize contact between said tube and the atmosphere within said enclosure, at least one spacer element being positioned between said tube and said tank, and other of said spacer elements being positioned between said coiled turns of said tube.