Ejector arrangement

1. An ejector arrangement comprising a housing, at least two ejectors arranged in said housing, each ejector having a motive inlet, a suction inlet, an outlet, and a longitudinal axis, the motive inlets of said ejectors being connected to a common motive line, wherein said suction inlets of said ejectors are connected by means of fluid paths to a common suction line, wherein each ejector is placed within a cartridge, each cartridge being arranged in said housing, and wherein each cartridge comprises a control valve controlling said motive inlet of each ejector within each cartridge.

2. The ejector arrangement according to claim 1 , wherein said motive line and said suction line are arranged parallel to each other.

3. The ejector arrangement according to claim 1 , wherein said outlets of said ejectors are connected to a common outlet line, said outlet line being arranged in parallel to at least one of said motive line and said suction line.

4. The ejector arrangement according to claim 3 , wherein said longitudinal axis is arranged perpendicular to at least one of said suction line and said outlet line.

5. The ejector arrangement according to claim 3 , wherein said suction line is placed between said motive line and said outlet line.

6. The ejector arrangement according to claim 1 , said control valve preferably having a valve seat which is aligned with a motive nozzle of each ejector in each cartridge.

7. The ejector arrangement according to claim 1 , wherein said cartridge comprises an outlet channel, said outlet channel crossing said suction line.

8. The ejector arrangement according to claim 1 , wherein said cartridge comprises a non-return valve placed in a fluid path of said fluid paths.

9. The ejector arrangement according to claim 1 , wherein a fluid path of said fluid paths from said suction line to said suction inlet comprises a 90° turn leaving said suction line and a 180° turn entering each ejector within each cartridge.

10. The ejector arrangement according to claim 1 , wherein said common suction line and an outlet line are connected to each other by means of a bypass-valve.

11. The ejector arrangement according to claim 1 , wherein at least one ejector is replaced by a dummy unit having the same interface to said housing as said at least one ejector.

12. The ejector arrangement according to claim 1 , wherein said suction line comprises a gas suction inlet and a separate liquid suction inlet.

13. The ejector arrangement according to claim 1 , wherein said housing comprises a monolithic structure.

14. The ejector arrangement according to claim 1 , wherein at least two ejectors of said at least two ejectors have different capacities.

15. The ejector arrangement according to claim 2 , wherein said outlets of said ejectors are connected to a common outlet line, said outlet line being arranged in parallel to at least one of said motive line and said suction line.

16. The ejector arrangement according to claim 4 , wherein said suction line is placed between said motive line and said outlet line.

17. The ejector arrangement according to claim 9 , wherein a non-return valve is placed between said 90° turn and said 180° turn.

18. The ejector arrangement according to claim 17 , wherein said non-return valve is placed symmetrically around said longitudinal axis.

19. The ejector arrangement according to claim 10 , wherein said bypass-valve has the same interface to said housing as an ejector.

20. The ejector arrangement according to claim 12 , wherein said suction line is divided in a gas section and a liquid section.

21. An ejector arrangement comprising:

a housing;

a first ejector and a second ejector arranged in the housing;

wherein the first ejector includes a first motive inlet, a first suction inlet, a first outlet and a first longitudinal axis;

wherein the second ejector includes a second motive inlet, a second suction inlet, a second outlet and a second longitudinal axis;

wherein the first ejector and the second ejector are connected to a common motive line;

where the first suction inlet is connected to a common suction line by a first fluid path;

wherein the second suction inlet is connected to the common suction line by a second fluid path;

wherein the first ejector is arranged within a first cartridge;

wherein the second ejector is arranged within a second cartridge;

wherein the first cartridge and the second cartridge are arranged in the housing;

wherein the first cartridge comprises a first control valve configured to control the first motive inlet; and

wherein the second cartridge comprises a second control valve configured to control the second motive inlet.