System and method for accurately blending fluids

• US 6,554,162 B2
• Filed: 05/24/2001
• Issued: 04/29/2003
• Est. Priority Date: 05/24/2001
• Status: Expired due to Fees

• Current Assignee: Chemand Corporation
• Original Assignee: Chemand Corporation
• Inventors: Schell, Daniel, Prince, Dan C.
• Primary Examiner(s): JACYNA, J CASIMER
• Application Number:
  US09/865,359
• Publication Number:
  US 20020175183A1
• Time in Patent Office: 705 Days
• Field of Search: 222/1, 222/14, 222/17, 222/21, 222/61, 222/64-68, 222/26, 222/424.5, 222/425, 222/426, 222/428, 222/430, 222/434, 222/438-440, 222/442-444, 222/450, 141/67, 141/198, 141/324
• US Class Current: 222/64
• CPC Class Codes: B01F 23/49 Mixing systems, i.e. flow charts or diagrams
• CPC Class Codes: B01F 35/882 using measuring chambers, e.g. volumetric pumps, for feeding the substances
• CPC Class Codes: B67D 7/0272 specially adapted for transferring liquids of high purity
• CPC Class Codes: B67D 7/74 Devices for mixing two or more different liquids to be transferred coin-freed apparatus G07F13/06
• CPC Class Codes: G05D 11/132 by controlling the flow of the individual components G05D11/133 takes precedence

Abstract

A fluid delivery system includes one or more measure modules for measuring and delivering predetermined volumes of one or more different fluids. Each measure module includes a fluid inlet port, a retention vessel, an overflow aperture to allow fluid in excess of the desired volume to flow out of the vessel, and an outlet port for dispensing the retained fluid. A calibrating rod adjustably occupies a portion of the volume of the vessel to facilitate precise adjustment of the volume of fluid dispensed by the measure module. In one particular embodiment, a blender includes a plurality of measure modules whose outputs are coupled together to produce a mixture having a composition defined by the relative capacities of the vessels of the various measure modules. In another particular embodiment, one blender dilutes a chemical concentrate, and provides the diluted mixture to another blender, which further dilutes the mixture.

Claims

1. A fluid delivery system comprising:

a measure module including a fluid inlet port, a vessel for receiving and retaining a fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained fluid;

a second measure module including a fluid inlet port, a vessel for receiving and retaining a second fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess second fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained second fluid;

a fluid mixing line coupled to receive said fluid from said first measure module, and to receive said second fluid from said second measure module; and

a volume storage module including a fluid inlet port for receiving a blended fluid from said fluid mixing line, a holding chamber for storing said blended fluid received from said fluid mixing line, and at least one fluid discharge port for discharging said stored fluid from said holding chamber.

2. A fluid delivery system according to claim 1, wherein the position of said aperture of said measure module is adjustable.

3. A fluid delivery system according to claim 2, wherein said aperture of said measure module is disposed on a vertical drain tube inside said vessel.

4. A fluid delivery system according to claim 2, wherein said aperture of said measure module is disposed in a wall of said vessel.

5. A fluid delivery system according to claim 1, further comprising a calibrating device for occupying a portion of said predetermined retention capacity of said vessel of said measure module.

6. A fluid delivery system according to claim 5, wherein said calibrating device comprises an adjustable rod.

7. A fluid delivery system according to claim 1, further comprising an overflow reservoir in fluid communication with said aperture of said measure module for retaining said excess fluid flowing out of said aperture.

8. A fluid delivery system according to claim 7, wherein said overflow reservoir includes an inlet valve to facilitate selective pressurization.

9. A fluid delivery system according to claim 8, wherein said overflow reservoir contains at least one sensor to detect the flow of said excess fluid into said overflow reservoir.

10. A fluid delivery system according to claim 1, wherein said measure module contains at least one sensor for determining when the volume of said fluid inside said vessel exceeds said predetermined retention capacity.

11. A fluid delivery system according to claim 10, wherein said sensor is adapted to sense said fluid flowing out of said vessel through said aperture.

12. A fluid delivery system according to claim 10, wherein said sensor is adapted to sense when said fluid level of said vessel has settled at said predetermined retention capacity.

13. A fluid delivery system according to claim 1, further comprising a valve for selectively coupling said vessel of said measure module to said fluid inlet port and said fluid outlet port.

14. A fluid delivery system according to claim 1, wherein said fluid outlet port of said measure module contains at least one sensor for detecting fluid flow out of said vessel.

15. A fluid delivery system according to claim 1, further comprising a flow controller to control the fluid flow rate through said outlet port of said measure module.

16. A fluid delivery system according to claim 1, further comprising a pressure valve for selectively coupling said vessel of said measure module with a pressure source.

17. A fluid delivery system according to claim 1, wherein said outlet port of said second measure module and said outlet port of said measure module are coupled to said fluid mixing line.

18. A fluid delivery system according to claim 1, further comprising at least one flow controller interposed between said fluid mixing line and one of said outlet ports of said measure module and said second measure module.

19. A fluid delivery system according to claim 1, wherein said volume storage module contains at least one sensor for generating a fill signal to said measure module and said second measure module.

20. A fluid delivery system according to claim 1, wherein said volume storage module contains at least one sensor for generating a dispense fluid signal to said measure module and said second measure module.

21. A fluid delivery system according to claim 1, further comprising a pressure valve to selectively couple said holding chamber of said volume storage module with a pressure source.

22. A fluid delivery system according to claim 1, further comprising an outlet valve coupled to said fluid discharge port to selectively facilitate fluid flow out of said volume storage module.

23. A fluid delivery system according to claim 1, further comprising a second volume storage module, including:

a fluid inlet port for receiving said blended fluid from said fluid mixing line;

a holding chamber for storing said blended fluid received from said fluid mixing line; and

at least one fluid discharge port for discharging said stored fluid from said holding chamber.

24. A fluid delivery system according to claim 23, further comprising a first steerage valve for selectively coupling said fluid mixing line with said fluid inlet port of said volume storage module.

25. A fluid delivery system according to claim 23, further comprising a second steerage valve for selectively coupling said fluid mixing line with said fluid inlet port of said second volume storage module.

26. A fluid delivery system according to claim 23, wherein said fluid delivery system includes a process supply port for providing said blended fluid to a processing system;

and at least one valve for selectively coupling said process supply port with one of said fluid discharge port of said volume storage module and said fluid discharge port of said second volume storage module.

27. A fluid delivery system according to claim 23, wherein said volume storage module receives said blended fluid from said fluid mixing line while said second volume storage module dispenses said stored blended fluid via said process supply port.

28. A fluid delivery system according to claim 1, further comprising a third measure module, said third measure module comprising:

a fluid inlet port;

a vessel for receiving and retaining a third fluid via said fluid inlet port;

an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess third fluid to flow out of said vessel; and

a fluid outlet port for dispensing said retained third fluid.

29. A fluid delivery system according to claim 28, wherein said fluid outlet port of said third measure module is coupled to said fluid outlet port of said measure module and to said fluid outlet port of said second measure module via said fluid mixing line.

30. A fluid delivery system according to claim 28, wherein said fluid inlet port of said third measure module is coupled to said fluid mixing line to receive said blended fluid.

31. A fluid delivery system according to claim 30, wherein a volume storage module is interposed between said fluid mixing line and said fluid inlet port of said third measure module.

32. A fluid delivery system according to claim 28, further comprising a fourth measure module, said fourth measure module comprising:

a fluid inlet port;

a vessel for receiving and retaining a fourth fluid via said fluid inlet port;

an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess fourth fluid to flow out of said vessel; and

a fluid outlet port for dispensing said retained fourth fluid.

33. A fluid delivery system according to claim 32, wherein said fluid outlet port of said fourth measure module and said fluid outlet port of said third measure module are coupled to a second fluid mixing line.

34. A fluid delivery system according to claim 33, wherein said fluid inlet port of said fourth measure module is coupled to receive said second fluid.

35. A fluid delivery system according to claim 33, wherein said second fluid mixing line is coupled to a process supply port.

36. A fluid delivery system according to claim 35, wherein a volume storage module is interposed between said second fluid mixing line and said process supply port.

37. A fluid delivery system comprising:

a measure module including a fluid inlet port, a vessel for receiving a fluid via said fluid inlet port, and for retaining a predetermined volume of said fluid, overflow means for releasing fluid in excess of said predetermined volume from said vessel, and a fluid outlet port for dispensing said retained fluid;

a second measure module including a fluid inlet port, a vessel for receiving a second fluid via said fluid inlet port, and for retaining a predetermined volume of said second fluid, overflow means for releasing fluid in excess of said predetermined volume from said vessel of said second measure module, and a fluid outlet port for dispensing said retained second fluid;

a third measure module including a fluid inlet port, a vessel for receiving a third fluid via said fluid inlet port, and for retaining a predetermined volume of said third fluid, overflow means for releasing fluid in excess of said predetermined volume from said vessel of said third measure module, and a fluid outlet port for dispensing said retained third fluid; and

wherein said fluid inlet port of said third measure module is coupled to receive fluid from said outlet ports of said measure module and said second measure module.

38. A fluid delivery system according to claim 37, further comprising a means for blending the fluid dispensed by said measure module with said fluid dispensed by said second measure module.

39. A fluid delivery system according to claim 37, further comprising a means for blending the fluids dispensed by said measure module, said second measure module, and said third measure module.

40. A fluid delivery system comprising:

a measure module including a fluid inlet port, a vessel for receiving and retaining a fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained fluid;

an overflow reservoir in fluid communication with said aperture for retaining said excess fluid flowing out of said aperture, said overflow reservoir including an inlet valve to facilitate selective pressurization; and

at least one sensor to detect the flow of said excess fluid into said overflow reservoir.

41. A fluid delivery system comprising:

a measure module including a fluid inlet port, a vessel for receiving and retaining a fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained fluid;

a second measure module including a fluid inlet port, a vessel for receiving and retaining a second fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess second fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained second fluid;

a third measure module including a fluid inlet port, a vessel for receiving and retaining a third fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess third fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained third fluid; and

a fluid mixing line coupling said output ports of said measure module and said second measure module with said fluid inlet port of said third measure module.

42. A fluid delivery system comprising:

a measure module including a fluid inlet port, a vessel for receiving and retaining a fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained fluid;

a second measure module including a fluid inlet port, a vessel for receiving and retaining a second fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess second fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained second fluid;

a fluid mixing line coupled to said fluid outlet port of said first measure module and said fluid outlet port of said second measure module;

a third measure module including a fluid inlet port coupled to said fluid mixing line, a vessel for receiving and retaining a third fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess third fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained third fluid, said third fluid being a blend of said fluid and said second fluid;

a fourth measure module including a fluid inlet port, a vessel for receiving and retaining a fourth fluid via said fluid inlet port, an aperture positioned to define a predetermined retention capacity of said vessel by allowing excess fourth fluid to flow out of said vessel, and a fluid outlet port for dispensing said retained fourth fluid;

a second fluid mixing line coupled to said fluid outlet port of said fourth measure module and said fluid outlet port of said third measure;

a volume storage module coupled to said fluid mixing line; and