Purified water supply system for high demand devices and applications

• US 20030034305A1
• Filed: 01/07/2002
• Published: 02/20/2003
• Est. Priority Date: 01/05/2001
• Status: Abandoned Application

• Current Assignee: Gambro, Inc. (DaVita Incorporated)
• Original Assignee: Gambro, Inc. (DaVita Incorporated)
• Inventors: Hannah, Johnny W., Bielefeld, John D., Mullins, Stephen M., Luehmann, Douglas A.
• Application Number:
  US10/041,898
• Publication Number:
  US 20030034305A1
• Time in Patent Office: Days
• US Class Current: 210/646
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/1668 Details of containers
• CPC Class Codes: A61M 2205/84 for treating several patients simultaneously
• CPC Class Codes: B01D 61/02 Reverse osmosis; Hyperfiltration ; Nanofiltration
• CPC Class Codes: B01D 61/025 Reverse osmosis; Hyperfiltration
• CPC Class Codes: B01D 61/08 Apparatus therefor
• CPC Class Codes: B01D 61/10 Accessories; Auxiliary operations
• CPC Class Codes: B01D 61/145 Ultrafiltration
• CPC Class Codes: B01D 61/58 Multistep processes
• CPC Class Codes: C02F 1/44 by dialysis, osmosis or reverse osmosis general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268
• CPC Class Codes: C02F 1/441 by reverse osmosis
• CPC Class Codes: C02F 1/444 by ultrafiltration or microfiltration
• CPC Class Codes: Y10T 137/0318 Processes
• CPC Class Codes: Y10T 137/0396 Involving pressure control
• CPC Class Codes: Y10T 137/0402 Cleaning, repairing, or assembling
• CPC Class Codes: Y10T 137/85954 Closed circulating system
• CPC Class Codes: Y10T 137/86035 Combined with fluid receiver

Abstract

A water supply sub-system for connection to a main water supply system, in which the sub-system includes: a storage tank having an inlet for connection to the main water supply system, an outlet and an outlet line connecting the outlet of the storage tank to a pump which pumps water from the tank to a sub-system supply line. One or more branch connections are connected to the sub-system supply line. Connectable to the one or more branch connections are one or more high-demand water using devices, such as dialyzer re-use machines. The subsystem may feed water to these high demand devices, and the sub-system and the one or more high demand devices may thus be substantially isolated from the main water supply system so that the high demands thereof will not adversely impact the water supply parameters. Thus, one or more lower demand machines, such as dialysis machines, may be connected to the main line without supply parameter disruption thereto. The sub-system preferably further includes a feedback loop and the storage tank preferably has a spray head disposed therein, the spray head being disposed to spray inlet and/or recirculated feed back water into said storage tank. Among other alternative options, an ultrafiltration device may also be included in the sub-system supply line to ensure the purity of the water circulating through the sub-system.

Claims

1. A water supply sub-system for connection to a main water supply system, said sub-system comprising:

a storage tank having an inlet for connection to said main water supply system, and an outlet;

an outlet line connected to the outlet of said storage tank;

a pump connected to said outlet line;

a sub-system supply line connected to said pump; and

a branch connection connected to said sub-system supply line.

2. A sub-system according to claim 1 wherein a high-demand water using device is connectable to said branch connection to receive water from said water supply sub-system.

3. A sub-system according to claim 2 wherein said high-demand water using device is a dialyzer re-use machine.

4. A sub-system according to claim 2 wherein said high-demand water using device is a dialyzer pre-cleaning machine.

5. A sub-system according to claim 1 wherein said sub-system comprises a plurality of branch connections whereby a plurality of water using devices may be simultaneously connected to respective branch connections so that said plurality of water using devices may simultaneously receive water from said water supply system.

6. A sub-system according to claim 1 further comprising a feedback loop connected to said sub-system supply line.

7. A sub-system according to claim 6 wherein said feedback loop is disposed downstream of said branch connection.

8. A sub-system according to claim 6 wherein said feedback loop is disposed upstream of said branch connection.

9. A sub-system according to claim 6 in which said storage tank has a spray head disposed therein, said spray head being connected to said inlet to said tank and being disposed to spray inlet water into said storage tank, said spray head also being connected to said feedback loop to receive recirculated water therefrom and spray said recirculated water into said storage tank.

10. A sub-system according to claim 1 in which said storage tank has a spray head disposed therein, said spray head being connected to said inlet to said tank and being disposed to spray inlet water into said storage tank.

11. A sub-system according to claim 1 further comprising an ultrafiltration device disposed in said supply line downstream of said pump and upstream of said branch connection.

12. A sub-system according to claim 1 whereby said sub-system is used in a medical application.

13. A sub-system according to claim 1 whereby said sub-system is used in a pharmaceutical manufacturing application.

14. A sub-system according to claim 1 whereby said sub-system is used in an electronics manufacturing application.

15. A water supply system comprising

a water processing unit;

a main inlet line connected to said water processing unit;

a main outlet line leading from said water processing unit;

a plurality of main branch connections emanating from said main outlet line; and

a water supply sub-system connected to said main water supply system, said sub-system comprising;

a storage tank having an inlet and an outlet, said inlet being connectable to one of said plurality of main branch connections;

an outlet line connected to the outlet of said storage tank;

a pump connected to said outlet line;

a sub-system supply line connected to said pump; and

a sub-system branch connection connected to said sub-system supply line.

16. A water supply system according to claim 15 wherein the water processing unit is a water purification device.

17. A water supply system according to claim 15 wherein the water processing unit is a water storage device.

18. A water supply system according to claim 15 wherein a low demand water device is connected to one of said plurality of main branch connections emanating from said main outlet line.

19. A water supply system according to claim 18 wherein said low de mand water device is a dialysis machine.

20. A sub-system according to claim 15 wherein a high-demand water using device is connectable to said branch connection to receive water from said water supply sub-system.

21. A sub-system according to claim 20 wherein said high-demand water using device is a dialyzer re-use machine.

22. A sub-system according to claim 20 wherein said high-demand water using device is a dialyzer pre-cleaning machine.

23. A sub-system according to claim 15 whereby said sub-system is used in a medical application.

24. A sub-system according to claim 15 whereby said sub-system is used in a pharmaceutical manufacturing application.

25. A sub-system according to claim 15 whereby said sub-system is used in an electronics manufacturing application.

26. A method for providing water from a main water supply system to a high demand device without adversely impacting the water flow parameters of the water flowing in said main water supply system, said method comprising,

connecting a supply sub-system to said main supply system, said sub-system comprising:

a storage tank having an inlet for connection to said main water supply system, and an outlet;

an outlet line connected to the outlet of said storage tank;

a pump connected to said outlet line;

and connecting a high demand device to said supply sub-system;

flowing water through said main water supply system and into said sub-system;

flowing water in said sub-system to said high demand device for its use.

27. A method for providing water according to claim 26 wherein said main water supply system has a low demand device connected thereto and wherein said step of flowing water through said main water supply system includes flowing water to said low demand device.

28. A method for providing water according to claim 27 wherein said low demand device is a dialysis machine.

29. A method for providing water according to claim 26 wherein said high demand device is a dialyzer re-use machine.

30. A method for providing water according to claim 26 wherein said high-demand water using device is a dialyzer pre-cleaning machine.

31. A method for providing water according to claim 26 which further comprises a step for disinfecting the main supply system using heat whereby the sub-system is isolated from main supply system during the disinfecting step.

32. A method for providing water according to claim 26 which further comprises a step for disinfecting the sub-system using a chemical whereby the sub-system is isolated from main supply system during the disinfecting step.