Brine injection system with a filter

1. A brine injection system comprising:

a plurality of needles, which are inserted into a product and through which brine is injected into the product, and

a filter,

wherein the brine which does not end up in the product is collected and recycled,

wherein during recycling of the brine, the brine flows through the filter,

wherein the filter comprises a filter element along which unfiltered brine flows and through which filtered brine passes and which holds back residues in the unfiltered brine,

wherein the filter element is at least locally curved, and

wherein a permeability of the filter element varies with a flow-length of the brine along the filter element.

2. The brine injection system according to claim 1 , wherein the filter element is at least locally inclined relative to a vertical and/or horizontal plane.

3. The brine injection system according to claim 1 , wherein the brine flows along and through the filter element by gravity.

4. The brine injection system according to claim 1 , wherein the permeability of the filter element increases with the flow-length of the brine along the filter element.

5. The brine injection system according to claim 1 , wherein the system comprises a chiller for the brine.

6. The brine injection system according to claim 1 , wherein the filter element is a screen.

7. The brine injection system according to claim 1 , wherein the filter element vibrates.

8. The brine injection system according to claim 1 , wherein the system comprises an extra filter upstream from the needles.

9. The brine injection system according to claim 1 , wherein the system comprises a cleaning system.

10. The brine injection system according to claim 9 , wherein the system comprises a moving device, which moves the cleaning system relative to the filter element of the filter.

11. The brine injection system according to claim 9 , wherein the cleaning system operates continuously or intermittently.

12. The brine injection system according to claim 9 , wherein the system comprises a sensor, which measures a flow of the brine through the filter element, and a signal of the sensor is utilized to control the cleaning system.

13. The brine injection system according to claim 9 , wherein the system comprises a recycle means to recycle the brine, which is sucked in by the cleaning system.

14. The brine injection system according to claim 1 , wherein the filter element is a slotted screen.

15. The brine injection system according to claim 1 , wherein the system comprises a vacuum cleaner.

16. The brine injection system according to claim 1 , wherein an angle of inclination of the filter element relative to a horizontal plane decreases with increased flow-length.

17. The brine injection system according to claim 1 , wherein a radius of curvature of the filter element is in a range from 1500 to 1800 mm.

18. The brine injection system according to claim 1 , wherein the permeability of the filter element is adjustable.

19. A system comprising:

a plurality of needles, the needles are inserted into a product and through which brine is injected into the product;

a filter comprising a filter element, the filter element is curved and inclined relative to a horizontal plane so that the brine flows along and through the filter element by gravity, a radius of curvature of the filter element is in a range from 1500 to 1800 mm, the filter element is a screen that vibrates to increase filter capacity of the filter element, the filter element is a slotted screen;

an extra filter upstream from the needles;

a chiller for the brine;

a cleaning system;

a moving device that moves the cleaning system relative to the filter element in one or two directions parallel to a surface of the filter element;

a sensor that measures a flow of the brine through the filter element, wherein a signal from the sensor is used to activate or deactivate the cleaning system;

a recycle means to recycle brine that is collected by the cleaning system;

wherein the brine which does not end up in the product is collected by the cleaning system and recycled in the recycle means;

wherein during recycling of the brine, the brine that does not end up in the product flows through the filter;

wherein unfiltered brine flows along the filter element, through which filtered brine passes and which holds back residues in the unfiltered brine; and

wherein a permeability of the filter element increases with a flow-length of the brine along the filter element.

20. The system according to claim 19 , wherein the permeability of the filter element is adjustable.