Fluid treatment system, separator and method using a magnetic field
There is provided a fluid treatment separator and a method of treating fluid such as tailings from tailings ponds resulting from oil sands production. A fluid treatment separator may be used for treatment of a mixture containing at least oil and water. The separator includes a mixing chamber, an inlet and at least one outlet. The mixing chamber defines a flow path between the inlet and the at least one outlet. The inlet includes a nozzle arranged to introduce turbulence to the mixture along the flow path. At least one magnet is arranged to apply a magnetic field to the mixture along the flow path.
1. A fluid treatment separator for treatment of a mixture containing at least oil and water, comprising:
a mixing chamber comprising:
i) an inlet and at least one outlet, the mixing chamber defining a flow path between the inlet and the at least one outlet, the mixing chamber having a length and an internal diameter, a ratio of the length to the internal diameter of the mixing chamber being at least 20:1, and the mixing chamber being made from a non-porous ferromagnetic material; and
ii) the inlet including a nozzle forming a restriction arranged to introduce turbulence to the mixture along the flow path; and
at least one magnet arranged to apply a magnetic field to the mixture along the flow path in which the at least one magnet is placed along the mixing chamber for a distance of at least 20 times the internal diameter of the mixing chamber, and in which the at least one magnet is adapted to heat the mixture through the application of an electromagnetic field along the distance of the mixing chamber to increase oil agglomeration, and water and oil separation of the mixture.
2. The fluid treatment separator of claim 1 in which the at least one magnet comprises a plurality of permanent magnets.
3. The fluid treatment separator of claim 2 in which the plurality of permanent magnets comprises neodymium magnets.
4. The fluid treatment separator of claim 2 in which the mixing chamber comprises an inner housing and the plurality of permanent magnets are mounted exterior to the inner housing.
5. The fluid treatment separator of claim 4 in which the mixing chamber is cylindrical and the plurality of permanent magnets are mounted to the inner housing of the mixing chamber and have a radius of curvature matching a radius of curvature of the inner housing.
6. The fluid treatment separator of claim 4 in which the mixing chamber further comprises an outer housing and the plurality of permanent magnets are mounted between the inner housing and the outer housing.
7. The fluid treatment separator of claim 2 in which the plurality of permanent magnets comprise a plurality of magnet pairs arranged along the length of the mixing chamber, each one of each pair of the plurality of magnet pairs having opposite polarity to the other of the pair.
8. The fluid treatment separator of claim 7 in which each pair of the plurality of magnet pairs is mounted on sides of the mixing chamber at a certain distance along the length of the mixing chamber, and in which each magnet pair of the magnet pairs have reversed polarities to an adjacent pair.
9. The fluid treatment separator of claim 7 in which each pair of the plurality of magnet pairs together fully extend around the mixing chamber.
10. The fluid treatment separator of claim 7 further comprising a plurality of inert spacers placed between adjacent pairs of the plurality of magnet pairs along the length of the mixing chamber.
11. The fluid treatment separator of claim 1 in which the at least one magnet comprises an electromagnet.
12. The fluid treatment separator of claim 11 further comprising a transformer connected to the electromagnet, and the transformer configured to receive power from a power source.
13. The fluid treatment separator of claim 1 in which the at least one magnet comprises a combination of permanent magnets and at least one electromagnet.
14. The fluid treatment separator of claim 1 in which the nozzle is a jet nozzle arranged to induce mixing of the mixture with a gas.
15. The fluid treatment separator of claim 1 further comprising a return loop of piping connecting one of the at least one outlets with the inlet to provide a return path to allow the application of the magnetic field to the mixture through the mixing chamber in multiple passes.
16. The fluid treatment separator of claim 1 further comprising an inlet pipe for connecting the inlet to a feed of untreated tailings.
17. A fluid treatment system, comprising:
first and second fluid treatment separators each as described in claim 1 ,
in which one of the at least one outlets of the first fluid treatment separator is in fluid connection with the inlet of the second fluid treatment separator.
18. The fluid treatment system of claim 17 further comprising a separation vessel downstream from one of the at least one outlets of the second fluid treatment separator.
19. The fluid treatment separator of claim 1 in which the nozzle has a uniform internal diameter.