CA2527543A1 - Vessel and method for treating contaminated water - Google Patents

Vessel and method for treating contaminated water Download PDF

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Publication number
CA2527543A1
CA2527543A1 CA002527543A CA2527543A CA2527543A1 CA 2527543 A1 CA2527543 A1 CA 2527543A1 CA 002527543 A CA002527543 A CA 002527543A CA 2527543 A CA2527543 A CA 2527543A CA 2527543 A1 CA2527543 A1 CA 2527543A1
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Canada
Prior art keywords
treatment vessel
water treatment
inlet
weir
fluid
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002527543A
Other languages
French (fr)
Other versions
CA2527543C (en
Inventor
Douglas W. Lee
George Muir
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Exterran Water Solutions ULC
Original Assignee
GLR Solutions Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GLR Solutions Ltd filed Critical GLR Solutions Ltd
Priority to CA2527543A priority Critical patent/CA2527543C/en
Priority to GB0622682A priority patent/GB2432329B/en
Publication of CA2527543A1 publication Critical patent/CA2527543A1/en
Application granted granted Critical
Publication of CA2527543C publication Critical patent/CA2527543C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0205—Separation of non-miscible liquids by gas bubbles or moving solids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0211—Separation of non-miscible liquids by sedimentation with baffles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B01D17/042—Breaking emulsions by changing the temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/32—Hydrocarbons, e.g. oil

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Physical Water Treatments (AREA)

Abstract

A vessel and method for removing immiscible fluid from contaminated water, the vessel comprising: at least one chamber; an injection line in fluid communication with an inlet of the one chamber; bubble generation means in fluid communication with the injection line for injecting gas bubbles into the injection line and allowing mixing in the injection line of the gas bubbles and the contaminated water to form an inlet fluid; an inlet weir within the chamber adjacent the inlet; an immiscible fluid weir within the chamber; a trough for collecting the immiscible fluid and allowing the immiscible fluid to flow out of the at least one chamber through an immiscible fluid outlet; and a cleaned water outlet generally at the bottom of the chamber; wherein when the inlet fluid is injected into the chamber, it passes through the inlet and over the inlet weir, the cleaned water flows downwardly toward the cleaned water outlet, and a remaining mixture of the immiscible fluid and the gas bubbles floats through the chamber to pass over the immiscible fluid weir and down the trough to the immiscible fluid outlet.

Claims (57)

1. A water treatment vessel for removing immiscible fluid from contaminated water to produce cleaned water, the vessel comprising:

at least one chamber;

an injection line in fluid communication with an inlet of the at least one chamber, the injection line for containing and transmitting the contaminated water from a source;

bubble generation means in fluid communication with the injection line for injecting gas bubbles into the injection line and allowing mixing in the injection line of the gas bubbles and the contaminated water to form an inlet fluid;

an inlet weir supported within the at least one chamber by first mounting means adjacent the inlet;

an immiscible fluid weir supported within the at least one chamber by second mounting means, spaced from the inlet weir;

a trough for collecting the immiscible fluid and allowing the immiscible fluid to flow out of the at least one chamber through an immiscible fluid outlet;
and a cleaned water outlet generally at the bottom of the at least one chamber;
wherein when the inlet fluid is injected into the at least one chamber, it passes through the inlet and over the inlet weir, the cleaned water flows downwardly toward the cleaned water outlet, and a remaining mixture of the immiscible fluid and the gas bubbles floats through the chamber to pass over the immiscible fluid weir and down the trough to the immiscible fluid outlet.
2. The water treatment vessel of Claim 1 wherein the water treatment vessel is substantially cylindrical.
3. The water treatment vessel of Claim 1 wherein the water treatment vessel is a pressure vessel.
4. The water treatment vessel of Claim 2 wherein the water treatment vessel is disposable in a horizontal orientation, the first mounting means being a direct mounting of the inlet weir on a first interior surface of the at least one chamber adjacent the inlet, and the second mounting means being a direct mounting of the immiscible fluid weir on a second interior surface of the at least one chamber spaced from the inlet weir.
5. The water treatment vessel of Claim 2 wherein the water treatment vessel is disposable in a vertical orientation.
6. The water treatment vessel of Claim 1 wherein the gas bubbles are microbubbles.
7. The water treatment vessel of Claim 6 wherein the microbubbles are each less than 50 microns in diameter.
8. The water treatment vessel of Claim 1 comprising at least two chambers, the at least two chambers in fluid communication by means of at least one connecting pipe, the at least one connecting pipe for allowing the cleaned water to pass from the bottom of a first of the at least two chambers to a point adjacent the inlet weir of an adjacent second of the at least two chambers, the cleaned water outlet generally at the bottom of a last of the at least two chambers.
9. The water treatment vessel of Claim 4 comprising five chambers in series, each chamber in fluid communication with adjacent chambers by means of at least one connecting pipe, the at least one connecting pipe for allowing the cleaned water to pass from the bottom of one of the first four chambers to a point adjacent the inlet weir of an adjacent one of the last four chambers, the cleaned water outlet generally at the bottom of a last of the five chambers.
10. The water treatment vessel of Claim 1 further comprising nozzle means on the inlet.
11. The water treatment vessel of Claim 1 further comprising recycle flow means for redirecting at least a portion of the cleaned water from the cleaned water outlet to the bubble generation means.
12. The water treatment vessel of Claim 1 wherein the immiscible fluid is oil or bitumen.
13. The water treatment vessel of Claim 8 wherein the at least two chambers are substantially of equal volume.
14. The water treatment vessel of Claim 11 wherein the recycle flow means are for redirecting approximately half of the cleaned water from the cleaned water outlet to the bubble generation means.
15. The water treatment vessel of Claim 8 further comprising gas bubble injection means in fluid communication with the at least one connecting pipe for selectively injecting gas bubbles at a location in the at least one connecting pipe spaced from the inlet weir of the adjacent second of the at least two chambers.
16. The water treatment vessel of Claim 1 further comprising flow control means on the cleaned water outlet to allow a steady state, for maintaining volume of fluid exiting the cleaned water outlet substantially equal to volume of the inlet fluid entering the water treatment vessel.
17. The water treatment vessel of Claim 9 further comprising flow control means on the cleaned water outlet to allow a steady state, for maintaining volume of fluid exiting the cleaned water outlet substantially equal to volume of the inlet fluid entering the water treatment vessel.
18. The water treatment vessel of Claim 1 further comprising at least one globe valve for controlling gas bubble injection into the injection line.
19. The water treatment vessel of Claim 9 wherein the at least one connecting pipe is sized to minimize pressure drop across the chambers of the water treatment vessel.
20. The water treatment vessel of Claim 1 further comprising weir adjustment means to enable height adjustment of the immiscible fluid weir to minimize clean water loss.
21. The water treatment vessel of Claim 20 further comprising at least one observation port in the at least one chamber to enable height adjustment of the immiscible fluid weir.
22. The water treatment vessel of Claim 20 wherein the weir adjustment means comprise a threaded spindle extending through the water treatment vessel and sealed by a packing gland, rotation of the spindle causing height adjustment of the immiscible fluid weir.
23. The water treatment vessel of Claim 20 wherein the immiscible fluid weir is composed of polyvinylidene fluoride.
24. The water treatment vessel of Claim 4 wherein the trough runs substantially along the length of the water treatment vessel and is sloped to encourage flow of the immiscible fluid toward the immiscible fluid outlet.
25. The water treatment vessel of Claim 1 wherein the trough is provided with at least one heating coil to aid in flow of the immiscible fluid therealong.
26. The water treatment vessel of Claim 1 wherein the immiscible fluid outlet is in fluid communication with an immiscible fluid retention tank adjacent the water treatment vessel.
27. The water treatment vessel of Claim 1 wherein the inlet weir comprises a base portion and a wall portion, the wall portion generally angled upwardly and outwardly from the base portion, for directing the inlet fluid upwardly and away from the inlet.
28. The water treatment vessel of Claim 1 wherein the immiscible fluid weir comprises a base portion and a wall portion, the wall portion generally angled upwardly and outwardly from the base portion, for receiving the remaining mixture of the immiscible fluid and the gas bubbles.
29. The water treatment vessel of Claim 21 wherein the water treatment vessel is provided with an aperture adjacent the immiscible fluid weir and a nozzle fitting housed within the aperture, the at least one observation port comprising a tempered glass viewing pane disposed between the nozzle fitting and a retention member, enabling visual inspection of the immiscible fluid weir.
30. The water treatment vessel of Claim 1 wherein the gas bubbles are composed of a gas selected from the group consisting of air, hydrocarbon gas, and nitrogen.
31. The water treatment vessel of Claim 8 wherein two adjacent chambers of the at least two chambers are separated by a substantially vertical wall for separating fluids contained in each of the two adjacent chambers.
32. The water treatment vessel of Claim 31 wherein the substantially vertical wall extends from a lower inner surface of the water treatment vessel toward but spaced from an upper inner surface of the water treatment vessel, for containing fluids in each of the two adjacent chambers while allowing gas exchange between the two adjacent chambers.
33. The water treatment vessel of Claim 31 wherein the at least one connecting pipe passes through the substantially vertical wall and enables fluid communication between the two adjacent chambers.
34. The water treatment vessel of Claim 4 wherein the immiscible fluid weir is disposed on the second interior surface substantially opposite from and generally above the inlet weir.
35. The water treatment vessel of Claim 29 further comprising an observation port clearing means.
36. The water treatment vessel of Claim 35 wherein the observation port clearing means comprise a conduit for selectively injecting gas or water into the nozzle fitting.
37. The water treatment vessel of Claim 5 wherein the inlet weir is centrally disposed within the at least one chamber, the immiscible fluid weir is circumferentially disposed about the inner surface of the at least one chamber, and the immiscible fluid weir is spaced from and disposed generally above the inlet weir.
38. The water treatment vessel of Claim 37 wherein the inlet weir comprises a base portion and a peripheral wall portion, the peripheral wall portion generally angled upwardly and outwardly from the base portion, for directing the inlet fluid upwardly and away from the inlet, the injection line extending across the at least one chamber to enter the inlet weir.
39. The water treatment vessel of Claim 37 wherein the immiscible fluid weir comprises a wall portion, the second mounting means comprising the wall portion being directly mounted on an interior surface of the water treatment vessel and generally angled upwardly and inwardly from the interior surface.
40. The water treatment vessel of Claim 38 wherein the first mounting means comprise the inlet weir being supported by the injection line.
41. The water treatment vessel of Claim 38 wherein the first mounting means comprise the inlet weir being supported by at least one rib projecting from an inner surface of the water treatment vessel.
42. A method for removing immiscible fluid from contaminated water from a source, the method comprising the steps of:

(a) providing a water treatment vessel comprising at least one chamber, an inlet weir supported within the at least one chamber by first mounting means, and an immiscible fluid weir supported within the at least one chamber by second mounting means, spaced from the inlet weir;

(b) transmitting the contaminated water from the source toward the at least one chamber by means of an injection line;

(c) providing bubble generation means for generating bubbles;
(d) generating and injecting the bubbles into the injection line;

(e) allowing the bubbles and contaminated water to mix in the injection line to form an inlet fluid;

(f) injecting the inlet fluid into the at least one chamber at an inlet adjacent the inlet weir;

(g) allowing the inlet fluid to pass over the inlet weir;

(h) allowing cleaned water and a remaining mixture of immiscible fluid and gas bubbles to separate from each other;

(i) allowing the cleaned water to flow downwardly by gravity to a cleaned water outlet;

(j) draining off the cleaned water through the cleaned water outlet;

(k) allowing the remaining mixture of immiscible fluid and gas bubbles to float across the at least one chamber and over the immiscible fluid weir; and (l) allowing the immiscible fluid to collect in a trough within the at least one chamber and flow out an immiscible fluid outlet.
43. The method of Claim 42 further comprising:

a step after step (a) but before step (b) of providing the water treatment vessel with immiscible fluid weir height adjustment means; and a step before step (k) of adjusting the immiscible fluid weir height adjustment means to minimize cleaned water loss over the immiscible fluid weir.
44. The method of Claim 43 further comprising:

a step after step (a) but before step (b) of providing the water treatment vessel with at least one observation port; and a step before step (k) of observing fluid level in the at least one chamber by means of the at least one observation port, to enable adjusting the immiscible fluid weir height adjustment means to minimize cleaned water loss over the immiscible fluid weir.
45. The method of Claim 44 further comprising:

a step after step (a) but before step (b) of providing the water treatment vessel with observation port clearing means; and a step of injecting gas or water into the observation port to clear the observation port of any build-up.
46. The method of Claim 42 wherein the water treatment vessel is provided with at least two chambers, the at least two chambers in fluid communication by means of at least one connecting pipe, the method further comprising the step after step (i) of allowing the cleaned water to pass from the bottom of a first of the at least two chambers to a point adjacent the inlet weir of an adjacent second of the at least two chambers by means of the at least one connecting pipe.
47. The method of Claim 42 wherein the bubble generation means generate microbubbles.
48. The method of Claim 42 wherein the bubbles are composed of a gas selected from the group consisting of air, hydrocarbon gas, and nitrogen.
49. The method of Claim 42 further comprising a step after step (j) of redirecting at least a portion of the cleaned water from the cleaned water outlet to the bubble generation means.
50. The method of Claim 49 wherein approximately half of the cleaned water from the cleaned water outlet is redirected to the bubble generation means.
51. The method of Claim 46 further comprising a step of selectively injecting gas bubbles at a location in the at least one connecting pipe spaced from the inlet weir of the adjacent second of the at least two chambers.
52. The method of Claim 51 further comprising a step of withholding gas bubble injection in the at least one connecting pipe leading into a last of the at least two chambers, thereby forming a calming zone.
53. The method of Claim 42 further comprising:

a step of providing the water treatment vessel with flow control means on the cleaned water outlet; and a step of using the flow control means to maintain volume of fluid exiting the cleaned water outlet substantially equal to volume of the inlet fluid entering the water treatment vessel, allowing for a steady state within the water treatment vessel.
54. The method of Claim 42 further comprising:

a step of disposing the water treatment vessel in a vertical orientation;

a step of centrally disposing the inlet weir within the at least one chamber;
and a step of circumferentially disposing the immiscible fluid weir about the inner surface of the at least one chamber, the immiscible fluid weir being spaced from and disposed generally above the inlet weir.
55. The method of Claim 42 further comprising a step after step (I) of collecting the immiscible fluid in an immiscible fluid retention tank.
56. A water treatment vessel for removing immiscible fluid from contaminated water to produce cleaned water, the vessel disposable in a horizontal orientation and comprising:

five chambers in series, each chamber in fluid communication with adjacent chambers by means of a connecting pipe having an inlet opening into a second of two adjacent chambers;

an injection line in fluid communication with an inlet of a first of the five chambers, the injection line for containing and transmitting the contaminated water from a source;

bubble generation means in fluid communication with the injection line for injecting gas microbubbles into the injection line and allowing mixing in the injection line of the gas microbubbles and the contaminated water to form an inlet fluid;

an inlet weir supported within each of the five chambers by a direct mounting on a first interior surface of the chamber adjacent the inlet of each chamber;

an immiscible fluid weir supported within each of the chambers by a direct mounting on a second interior surface of the chamber, spaced from the inlet weir;

a trough in communication with the immiscible fluid weir of each of the chambers for collecting the immiscible fluid and allowing the immiscible fluid to flow out of the chambers through an immiscible fluid outlet; and a cleaned water outlet generally at the bottom of a last of the five chambers;

wherein when the inlet fluid is injected into the first of the five chambers, the inlet fluid passes over the inlet weir, the cleaned water flows downwardly toward the bottom of the first of the five chambers and through the connecting pipe to a next adjacent chamber, the cleaned water flows sequentially through each of the chambers, and the cleaned water finally flows through the cleaned water outlet;
and wherein a remaining mixture of the immiscible fluid and the gas microbubbles floats through each of the chambers to pass over the immiscible fluid weir and down the trough to the immiscible fluid outlet.
57. A water treatment vessel for removing immiscible fluid from contaminated water to produce cleaned water, the vessel disposable in a vertical orientation and comprising:

a chamber;

an injection line in fluid communication with an inlet of the chamber, the injection line for containing and transmitting the contaminated water from a source;

bubble generation means in fluid communication with the injection line for injecting gas microbubbles into the injection line and allowing mixing in the injection line of the gas microbubbles and the contaminated water to form an inlet fluid;

an inlet weir centrally disposed and supported within the chamber by first mounting means adjacent the inlet of the chamber;

an immiscible fluid weir circumferentially disposed about an inner surface of the chamber, spaced from and disposed generally above the inlet weir;
a trough in communication with the immiscible fluid weir for collecting the immiscible fluid and allowing the immiscible fluid to flow out of the chamber through an immiscible fluid outlet; and a cleaned water outlet generally at the bottom of the chamber;

wherein when the inlet fluid is injected into the chamber, the inlet fluid passes over the inlet weir, the cleaned water flows downwardly toward the bottom of the chamber and through the cleaned water outlet; and wherein a remaining mixture of the immiscible fluid and the gas microbubbles floats through the chamber to pass over the immiscible fluid weir and down the trough to the immiscible fluid outlet.
CA2527543A 2005-11-22 2005-11-22 Vessel and method for treating contaminated water Active CA2527543C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2527543A CA2527543C (en) 2005-11-22 2005-11-22 Vessel and method for treating contaminated water
GB0622682A GB2432329B (en) 2005-11-22 2006-11-14 Vessel and method for treating contaminated water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2527543A CA2527543C (en) 2005-11-22 2005-11-22 Vessel and method for treating contaminated water

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Publication Number Publication Date
CA2527543A1 true CA2527543A1 (en) 2007-05-22
CA2527543C CA2527543C (en) 2011-11-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103102024A (en) * 2012-12-19 2013-05-15 贵州长绿科技有限公司 Recycling method for oily wastewater
EP3009178A1 (en) * 2009-01-12 2016-04-20 TS-Technology AS Cleaning of oleaginous water iii
US11857893B2 (en) 2020-08-18 2024-01-02 1501367 Alberta Ltd. Fluid treatment separator and a system and method of treating fluid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102115223B (en) * 2011-01-06 2012-09-05 山东大学 Method for treating micro-nano bubbles of oil extraction sewage in oil field

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NL7211241A (en) * 1972-08-17 1974-02-19
US4818388A (en) * 1986-12-09 1989-04-04 Taikisha Ltd. Paint waste separating and collecting apparatus
US5158678A (en) * 1990-09-28 1992-10-27 Broussard Paul C Sr Water clarification method and apparatus
JPH0615262A (en) * 1990-10-19 1994-01-25 Daniel L Bowers Co Device and method for separating fine particle from liquid having floating fine particle therein
US5766484A (en) * 1996-06-03 1998-06-16 Envirex Inc. Dissolved gas floatation device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3009178A1 (en) * 2009-01-12 2016-04-20 TS-Technology AS Cleaning of oleaginous water iii
US9808741B2 (en) 2009-01-12 2017-11-07 Cameron Systems As Cleaning of oleaginous water III
US10143939B2 (en) 2009-01-12 2018-12-04 Cameron Systems As Cleaning of oleaginous water III
US10369495B2 (en) 2009-01-12 2019-08-06 Cameron Systems As Cleaning of oleaginous water III
CN103102024A (en) * 2012-12-19 2013-05-15 贵州长绿科技有限公司 Recycling method for oily wastewater
US11857893B2 (en) 2020-08-18 2024-01-02 1501367 Alberta Ltd. Fluid treatment separator and a system and method of treating fluid

Also Published As

Publication number Publication date
GB2432329B (en) 2010-12-01
GB0622682D0 (en) 2006-12-27
CA2527543C (en) 2011-11-08
GB2432329A (en) 2007-05-23

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