Apparatus and method for regulating flow through a pumpbox
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B03B-001/00
C02F-001/24
B03B-005/62
B03D-001/24
B03D-001/02
B03D-001/14
B03B-009/02
B01D-021/24
출원번호
US-0969380
(2010-12-15)
등록번호
US-8968580
(2015-03-03)
우선권정보
CA-2689021 (2009-12-23)
발명자
/ 주소
Hann, Thomas Charles
Garner, William Nicholas
출원인 / 주소
Suncor Energy Inc.
대리인 / 주소
Knobbe, Martens, Olson & Bear, LLP
인용정보
피인용 횟수 :
0인용 특허 :
131
초록▼
A pumpbox apparatus includes a reservoir volume having a first inlet for receiving a feedstock stream and a second inlet for receiving a water stream, the reservoir volume being in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir volume. The reservoir
A pumpbox apparatus includes a reservoir volume having a first inlet for receiving a feedstock stream and a second inlet for receiving a water stream, the reservoir volume being in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir volume. The reservoir volume is operable to accumulate the feedstock stream and the water stream in the reservoir volume while withdrawing a discharge stream through the discharge outlet to cause a flow of liquid through the pumpbox. The first inlet defines a first flow velocity region between the first inlet and the second inlet and a second flow velocity region between the second inlet and the discharge outlet. The first flow velocity is lower than the second flow velocity to facilitate flotation of a low specific gravity portion of the feedstock through the first region toward an upper surface of the liquid accumulated in the reservoir volume.
대표청구항▼
1. A pumpbox apparatus for processing a feedstock stream, the apparatus comprising: a reservoir having a first inlet for receiving the feedstock stream and a second inlet for receiving a water stream, the reservoir being in communication with a discharge outlet disposed to discharge accumulated liqu
1. A pumpbox apparatus for processing a feedstock stream, the apparatus comprising: a reservoir having a first inlet for receiving the feedstock stream and a second inlet for receiving a water stream, the reservoir being in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir, the reservoir being operable to accumulate the feedstock stream and the water stream to a first liquid level in the reservoir while withdrawing a discharge stream through the discharge outlet to cause a flow of liquid through the pumpbox, the first inlet being located above the second inlet and defining a first flow region between the first inlet and the second inlet, the second inlet being located above the discharge outlet and defining a second flow region between the second inlet and the discharge outlet, a first flow velocity in the first flow region being lower than a second flow velocity in the second flow region to facilitate flotation of a low specific gravity portion of the feedstock through the first flow region toward an upper surface of the liquid accumulated in the reservoir; anda collector for collecting at least a portion of the low specific gravity portion from an upper surface of the accumulated volume when the first liquid level is above the first inlet. 2. The apparatus of claim 1 further comprising a controller for controlling a flow rate through the discharge outlet to maintain the first liquid level at a level between the first inlet and a high liquid level associated with a maximum operating level for the reservoir. 3. The apparatus of claim 2 wherein the collector is operably configured to collect at least a portion of the low specific gravity portion from an upper surface of the accumulated volume when the first liquid level reaches a high liquid level. 4. The apparatus of claim 2 wherein the collector comprises a launder having an inlet disposed in the reservoir at the high liquid level for receiving an overflow of the low specific gravity portion from the reservoir. 5. The apparatus of claim 2 wherein the reservoir is selected to maintain a retention time of feedstock and water in the pumpbox of about 1 minute. 6. The apparatus of claim 1 further comprising a discharge pump in communication with the discharge outlet for withdrawing the discharge stream from the discharge outlet. 7. The apparatus of claim 6 wherein the discharge pump is operably configured to discontinue operation when the liquid level reaches a low liquid level. 8. The apparatus of claim 6 further comprising a controller operably configured to control operation of the discharge pump in response to receiving a liquid level signal representing an accumulation level of liquid in the reservoir. 9. The apparatus of claim 1 wherein the feedstock stream comprises an aerated bitumen froth having a density in the range of about 600 kg/m3 to about 1000 kg/m3. 10. The apparatus of claim 9 wherein the feedstock stream comprises water and solids. 11. The apparatus of claim 1 wherein the water stream comprises a re-circulated water stream. 12. The apparatus of claim 11 wherein the re-circulated water stream comprises residual bitumen and solids. 13. The apparatus of claim 1 wherein said second inlet is disposed to cause solids that settle out of the accumulated liquid volume to be dispersed toward the discharge outlet for discharge in the discharge stream. 14. The apparatus of claim 13 wherein said second inlet is oriented to direct the water stream received at the second inlet generally towards the discharge outlet. 15. The apparatus of claim 13 wherein the pumpbox comprises a base having portion that is inclined to direct solids that settle out of the accumulated liquid volume toward the discharge outlet for discharge in the discharge stream. 16. The apparatus of claim 1 wherein a density of the discharge stream is between about 122×101 and about 128×101 kg/m3. 17. The apparatus of claim 1 wherein the flow velocity in the first flow region is less than 5×10−2 meters per second. 18. A pumpbox apparatus for processing a feedstock stream, the apparatus comprising: a reservoir having a first inlet for receiving the feedstock stream and a second inlet for receiving a water stream, the reservoir being in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir, the reservoir being operable to accumulate the feedstock stream and the water stream to a first liquid level in the reservoir while withdrawing a discharge stream through the discharge outlet to cause a flow of liquid through the pumpbox, the first inlet being located above the second inlet and defining a first flow region between the first inlet and the second inlet, the second inlet being located above the discharge outlet and defining a second flow region between the second inlet and the discharge outlet, a first flow velocity in the first flow region being lower than a second flow velocity in the second flow region to facilitate flotation of a low specific gravity portion of the feedstock through the first flow region toward an upper surface of the liquid accumulated in the reservoir; andmeans for collecting at least a portion of the low specific gravity portion from an upper surface of the accumulated volume when the first liquid level is above the first inlet. 19. The apparatus of claim 18 further comprising means for controlling a flow rate through the discharge outlet to maintain the first liquid level at a level between the first inlet and a high liquid level associated with a maximum operating level for the pumpbox. 20. The apparatus of claim 19 wherein said means for collecting comprises means for collecting at least a portion of the low specific gravity portion from an upper surface of the accumulated volume when the first liquid level reaches a high liquid level. 21. The apparatus of claim 19 wherein said means for controlling comprises means for controlling a flow rate through the discharge outlet to maintain a retention time of the feedstock stream and water stream in the reservoir of about 1 minute. 22. The apparatus of claim 18 wherein the feedstock stream comprises an aerated bitumen froth having a density in the range of about 600 kg/m3 to about 1000 kg/m3. 23. The apparatus of claim 22 wherein the feedstock stream further comprises water and solids. 24. The apparatus of claim 18 wherein the water stream comprises a re-circulated water stream. 25. The apparatus of claim 24 wherein the re-circulated water stream comprises at least one of residual bitumen and solids. 26. The apparatus of claim 18 further comprising means for causing solids that settle out of the accumulated liquid volume to be dispersed toward the discharge outlet for discharge in the discharge stream. 27. The apparatus of claim 18 wherein a density of the discharge stream is between about 122×101 and about 128×101 kg/m3. 28. The apparatus of claim 18 wherein the first flow velocity is less than about 5×10−2 meters per second. 29. A method for regulating flow through a pumpbox having a reservoir in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir, the method comprising: receiving a feedstock stream at a first inlet of the reservoir;receiving a water stream at a second inlet of the reservoir;accumulating the feedstock stream and the water stream to a first liquid level in the reservoir while withdrawing a discharge stream through the discharge outlet to cause a flow of liquid through the pumpbox, the first inlet being located above the second inlet and defining a first flow region between the first inlet and the second inlet the second inlet being located above the discharge outlet and defining a second flow region between the second inlet and the discharge outlet, a first flow velocity in the first flow region being lower than a second flow velocity in the second flow region to facilitate flotation of a low specific gravity portion of the feedstock through the first flow region toward an upper surface of the liquid accumulated in the reservoir; andcollecting at least a portion of the low specific gravity portion from an upper surface of the accumulated volume when the first liquid level is above the first inlet. 30. The method of claim 29 further comprising controlling a flow rate through the discharge outlet to maintain the first liquid level at a level between the first inlet and a high liquid level associated with a maximum operating level for the reservoir. 31. The method of claim 30 wherein collecting comprises collecting at least a portion of the low specific gravity portion from an upper surface of the accumulated volume when the first liquid level reaches the high liquid level. 32. The method of claim 30 wherein collecting comprises causing the low specific gravity portion to overflow into a launder having an inlet disposed in the reservoir at the high liquid level. 33. The method of claim 29 wherein withdrawing the discharge stream comprises operating a discharge pump in communication with the discharge outlet. 34. The method of claim 33 further comprising discontinuing operation of the discharge pump when the liquid level reaches a low liquid level. 35. The method of claim 33 further comprising controlling operation of the discharge pump in response to receiving a liquid level signal representing an accumulation level of liquid in the reservoir. 36. The method of claim 29 wherein the feedstock stream comprises an aerated bitumen froth having a density in the range of about 600 kg/m3 to about 1000 kg/m3. 37. The method of claim 36 wherein the feedstock stream comprises water and solids. 38. The method of claim 29 wherein receiving the water stream comprises receiving a re-circulated water stream. 39. The method of claim 38 wherein the re-circulated water stream comprises residual bitumen and solids. 40. The method of claim 29 further comprising causing solids that settle out of the accumulated liquid volume to be dispersed toward the discharge outlet for discharge in the discharge stream. 41. The method of claim 40 wherein causing solids that settle out of the accumulated liquid volume to be dispersed comprises directing the water stream received at the second inlet generally towards the discharge outlet. 42. The method of claim 29 wherein a density of the discharge stream is between about 122×101 and about 128×101 kg/m3. 43. The method of claim 29 wherein the first flow velocity is less than 5×10−2 meters per second. 44. A system for extracting bitumen from a feedstock, the system comprising: a pumpbox comprising a reservoir having a first inlet for receiving a feedstock stream and a second inlet for receiving a water stream, the reservoir being in communication with a discharge outlet disposed to discharge accumulated liquid from the reservoir, the reservoir being operable to accumulate the feedstock stream and the water stream to a first liquid level in the reservoir while withdrawing a discharge stream through the discharge outlet to cause a flow of liquid through the pumpbox, the first inlet being located above the second inlet and defining a first flow region between the first inlet and the second inlet, the second inlet being located above the discharge outlet and defining a second flow region between the second inlet and the discharge outlet, a first flow velocity in the first flow region being lower than a second flow velocity in the second flow region to facilitate flotation of a low specific gravity portion of the feedstock through the first flow region toward an upper surface of the liquid accumulated in the reservoir;a first hydrocyclone having a feed inlet, an overflow outlet for producing a first product stream, and an underflow outlet, the feed inlet of the first hydrocyclone being in communication with the discharge outlet of the pumpbox for receiving the discharge stream from the pumpbox;a second hydrocyclone having a feed inlet, an overflow outlet, and an underflow outlet for producing a first tailings stream, the feed inlet of the second hydrocyclone being in communication with the underflow outlet of the first hydrocyclone, the overflow outlet of the second hydrocyclone being in communication with the second inlet of the pumpbox for providing the water stream to the pumpbox; andwherein the pumpbox further comprises a collector for collecting at least a portion of the low specific gravity bitumen portion from an upper surface of the accumulated volume when the first liquid level is above the first inlet to produce a second product stream, the second product stream being combined with the first product stream to produce a system product stream. 45. The system of claim 44 further comprising a third hydrocyclone having a feed inlet, an overflow outlet, and an underflow outlet, the feed inlet of the third hydrocyclone being in communication with the underflow outlet of the second hydrocyclone for receiving the first tailings stream, the third hydrocyclone being operable to produce a second tailings stream at the underflow outlet of the second hydrocyclone, the overflow outlet of the third hydrocyclone being in communication with the feed inlet of the second hydrocyclone to provide an additional feed to the second hydrocyclone.
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