Granted Patent B2

US 7,914,686 · App. 11/252,494 · Granted Mar 29, 2011

Abstract

Claims (31)

1. A process for using an electrical signal to cause electrokinetic floatation of solids and semi-solids in paint sludge water, the process comprising:

collecting the paint sludge water into a tank via a pipe extending across a width of the tank at an input end thereof and configured to release the paint sludge water in substantially even amounts over the width of the tank;

generating the electrical signal from a bottom of the tank to separate the solids and semi-solids from water in the paint sludge water to induce electrokinetic floatation of the solids and semi-solids to a top surface of the paint sludge water; and

removing the solids and semi-solids from the tank.

2. The process of claim 1 , wherein the electrical signal comprises a low voltage dc current.

3. The process of claim 1 , further comprising:

producing a dynamic flow system such that the paint sludge water travels over a length of the tank.

4. The process of claim 1 , wherein producing the electrical signal further comprises:

producing the electrical signal across a width of the tank.

5. The process of claim 4 , further comprising:

producing gas bubbles using the electrical signal to cause the solids and semi-solids to float to the top surface as the paint sludge water flows across the electrical signal.

6. The process of claim 1 , further comprising:

removing the water from the tank after the solids and semi-solids have been separated from the water.

7. The process of claim 6 , further comprising:

generating an electric field using the electrical signal to induce electromagnetic forces to cause the solids and semi-solids to float away from the bottom of the tank and towards the top surface of the paint sludge water.

8. The process of claim 1 , wherein producing the electrical signal further comprises:

producing the electrical signal from an electrode system about the bottom of the tank.

9. An electrode system for electrokinetic floatation of solids and semi-solids in paint sludge water using low voltage dc current, the electrode system comprising;

a mixing tank adaptable for collecting the paint sludge water;

a sludge tank coupled to the mixing tank for receiving the paint sludge water via a pipe extending across a width of the sludge tank at an input end thereof and configured to release the paint sludge water in substantially evenly distributed amounts over the width of the sludge tank, wherein the sludge tank includes an electrode array operable to emit the low voltage dc current across a bottom of the sludge tank to separate the solids and semi-solids from water by inducing the electrokinetic floatation of the solids and semi-solids in the paint sludge, water; and

a paint sludge removal system coupled to the sludge tank and adapted to remove the solids and semi-solids from the sludge tank.

10. The electrode system of claim 9 , further including a pump coupled to the sludge tank and adapted to remove the paint sludge water from the sludge tank.

11. The electrode system of claim 9 , wherein the paint sludge water flows across a length of the sludge tank.

12. The electrode system of claim 9 , wherein the electrode array is positioned across a width of the sludge tank.

13. The electrode system of claim 12 , wherein the solids and semi-solids float to a top surface of the paint sludge water as the paint sludge water flows over the electrode array.

14. The electrode system of claim 9 , wherein the electrode array comprises a first electrode having a polarity of a negative charge and a second electrode having a polarity of a positive charge.

15. The electrode system of claim 14 , wherein the polarity of the first and second electrodes is reversed at a predetermined time.

16. The electrode system of claim 14 , wherein the plurality of electrodes are positioned equidistantly from one another along a width of the sludge tank.

17. The electrode system of claim 9 , wherein the electrode array emits the low voltage dc current in the paint sludge water to cause electrochemical reactions to produce gas bubbles.

18. The electrode system of claim 17 , wherein the gas bubbles cause the solids and semi-solids to float to a top surface of the paint sludge water.

19. The electrode system of claim 9 , wherein the low voltage dc current generates electromagnetic forces to induce the solids and semi-solids to float away from the electrode array towards the surface of the paint sludge water.

Assignments (20)