Liquid separator for an evaporator system

Patent metadata

Field	Value
Publication number	US-10036583-B2
Application number	US-74124908-A
Country	US
Kind code	B2
Filing date	Nov 4, 2008
Priority date	Nov 5, 2007
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

Liquid separator ( 2 ), designed as a U-shaped pipe ( 5 ) and arranged essentially horizontally, for a plate heat exchanger evaporator ( 1 ) system for separation of liquid droplets from vapor transported from the evaporator to the separator.

First claim

The invention claimed is:

1. A liquid separator for a plate heat exchanger evaporator system for separation of liquid droplets from vapour transported from the evaporator to the separator, wherein the separator is designed as a U-shaped separator pipe comprising two parallel pipes interconnected by a pipe portion, said pipes being arranged horizontally, each of said parallel pipes extending from the pipe portion and terminating at a respective free end, the two pipes including a first pipe possessing an end remote from the pipe portion and a second pipe possessing an end remote from the pipe portion, the end of the first pipe being connected to the evaporator to introduce into the separator the liquid droplets and vapour from the evaporator, the vapour separated from the liquid droplets and the liquid droplets separated from the vapour leaving the separator at the end of the second pipe.

2. The liquid separator according to claim 1 , wherein the separator pipe has a bend of 180°.

3. The liquid separator according to any one of claim 1 or 2 wherein the length of the separator pipe is adjustable.

4. The liquid separator according to any one of claim 1 or 2 , wherein the length and width of the separator pipe is configured to approximately correspond to the length and width of the evaporator.

5. The liquid separator according to any one of claim 1 or 2 , wherein the separator pipe has a diameter between 100 and 400 mm.

6. The liquid separator according to any one of claim 1 or 2 , wherein the entire U-shaped separator pipe is configured to be arranged on top of the evaporator.

7. The liquid separator according to any one of claim 1 or 2 , wherein the separator is configured to be arranged on a side of the evaporator.

8. The liquid separator according to any one of claim 1 or 2 , wherein the separator is provided with a demister.

9. The liquid separator according to any one of claim 1 or 2 , wherein the separator is provided with an ejector injecting high pressure liquid into the separator.

10. The liquid separator according to any one of claim 1 or 2 , wherein the separator is made of stainless steel.

11. The liquid separator according to any one of claim 1 or 2 , wherein the separator is made of carbon steel with a surface treatment against corrosion.

12. A liquid separator together with an evaporator in a plate heat exchanger evaporator system for separating liquid droplets from vapour transported from the evaporator to the separator, the separator being a U-shaped separator pipe comprising two parallel pipes interconnected by a pipe portion, said pipes being arranged horizontally, one end portion of the U-shaped separator pipe being connected to the evaporator to receive the liquid droplets and the vapour from the evaporator and an opposite end portion of the U-shaped separator pipe also being connected to the evaporator to directly return to the evaporator the liquid droplets which have been separated from the vapour while the vapour which has been separated from the liquid droplets leaves at the opposite end of the U-shaped separator pipe to a compressor, each of said parallel pipes extending from the pipe portion and terminating at a respective free end.

13. The liquid separator according to claim 12 , wherein the separator pipe has a bend of 180°.

14. The liquid separator according to claim 12 , wherein the separator pipe possesses an adjustable length.

15. The liquid separator according to claim 12 , wherein the separator pipe possesses a length and width approximately corresponding to the length and width of the evaporator.

16. The liquid separator according to claim 12 , wherein the separator pipe has a diameter between 100 and 400 mm.

17. The liquid separator according to claim 12 , wherein the entire U-shaped separator pipe is arranged on top of the evaporator.

18. The liquid separator according to claim 12 , wherein the separator is arranged on a side of the evaporator.

19. The liquid separator according to claim 12 , wherein the one end portion of the U-shaped separator pipe is connected to a top connection of the evaporator, and the opposite end portion of the U-shaped separator pipe is connected to a bottom connection of the evaporator.

20. The liquid separator according to claim 12 , a first one of the two parallel pipes extending from the pipe portion and terminating at a first free end, and a second one of the two parallel pipes extending from the pipe portion and terminating at a second free end, the first free end of the first pipe being remote from the second free end of the second pipe.

21. A liquid separator for a plate heat exchanger evaporator system for separation of liquid droplets from vapour transported from the evaporator to the separator, wherein the separator is a U-shaped separator pipe comprising two parallel pipes interconnected by a curved pipe portion, the pipes being arranged horizontally, each of the parallel pipes extending from the pipe portion and terminating at a respective free end, each of the two parallel pipes possessing a length, the length of each of the two pipes being equal, a first connection at an end of one of the two parallel pipes by way of which two-phase flow is introduced into the separator to flow along the separator and be separated into the liquid droplets and the vapour, and a second connector at an end of the other of the two parallel pipes and through which the liquid droplets separated from the vapour are transported out of the separator directly to the evaporator while the vapour leaves at the end of the other of the two parallel pipes to a compressor.

22. The liquid separator according to claim 19 , wherein the opposite end portion of the U-shaped separator pipe is also connected to a compressor so that dry vapor separated from refrigerant liquid droplets is introduced into the compressor.

Assignees

• Sollie Bjoern
• Stromblad Mats
• Stenhede Claes
• Alfa Laval Corp Ab

Inventors

• Sollie Björn
• Stromblad Mats
• Stenhede Claes

Classifications

• F25B43/00 Primary

  Arrangements for separating or purifying gases or liquids (in analysers or rectifiers F25B33/00); Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat (F25B40/00 takes precedence) · CPC title

• F25B2341/0011

  Ejectors with the cooled primary flow at reduced or low pressure · CPC title

• F28D9/00

  Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall {(F28F3/083, F28F3/086 take precedence)} · CPC title

• F25B2400/23

  Separators · CPC title

• F25B39/022 Primary

  with plate-like or laminated elements · CPC title