IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0114323
(2012-04-19)
|
등록번호 |
US-9587177
(2017-03-07)
|
국제출원번호 |
PCT/CA2012/050247
(2012-04-19)
|
§371/§102 date |
20131028
(20131028)
|
국제공개번호 |
WO2012/149648
(2012-11-08)
|
발명자
/ 주소 |
- Van Der Merwe, Shawn
- Hann, Thomas
- Grappolini, Benjamin John
|
출원인 / 주소 |
|
대리인 / 주소 |
Marshall, Gerstein & Borun LLP
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
124 |
초록
▼
More particularly, the model was a dynamic simulation built in HYSYS™ v7.1. The component slate was simplified and selected to give a vapor and two liquid phases, and have the ability to measure an S/B ratio. All the unit operations were included and modeled as best fit within HYSYS™. Pumps were all
More particularly, the model was a dynamic simulation built in HYSYS™ v7.1. The component slate was simplified and selected to give a vapor and two liquid phases, and have the ability to measure an S/B ratio. All the unit operations were included and modeled as best fit within HYSYS™. Pumps were all modelled as standard HYSYS™ centrifugal pumps with performance curves, settlers were modelled as vertical 3-phase vessels with internal weir enabled—the overflow side of the weir is used to simulate the overflow vessels on the settlers. All proposed controllers were included with generic tuning parameters, which control the system process variable (PV) to match a set point (SP). The control algorithm incorporated master PV controllers such as S/B ratio to relate froth and solvent flows and maintain relative material balance relationship between the process streams involved. In this specific simulation, the solvent flows were assigned a slave relationship relative to the bitumen flow; that is, the solvent controller SP was reset based on the bitumen froth flow and the master S/B ratio.
대표청구항
▼
1. A process for operating a bitumen froth treatment operation in turndown mode, comprising: adding a solvent containing stream to bitumen froth to produce diluted bitumen froth;separating the diluted bitumen froth into a diluted bitumen component and a solvent diluted tailings component; andin resp
1. A process for operating a bitumen froth treatment operation in turndown mode, comprising: adding a solvent containing stream to bitumen froth to produce diluted bitumen froth;separating the diluted bitumen froth into a diluted bitumen component and a solvent diluted tailings component; andin response to a reduction in flow of the bitumen froth:recirculating a portion of the diluted bitumen component into the bitumen froth as a recirculated dilbit component; andreturning a portion of the solvent diluted tailings component into the step of separating as a returned solvent diluted tailings component. 2. The process of claim 1, wherein the step of separating is performed in a separation apparatus comprising: a first stage separation vessel receiving the diluted bitumen froth and producing the diluted bitumen component and a first stage underflow component; anda second stage separation vessel receiving the first stage underflow component and producing the solvent diluted tailings components and a second stage overflow component. 3. The process of claim 2, comprising returning a portion of the first stage underflow component into the first stage separation vessel. 4. The process of claim 2, comprising returning a portion of the second stage underflow component into the second stage separation vessel. 5. The process of claim 2, comprising recirculating a portion of the second stage overflow component into the bitumen froth and/or into the first stage underflow. 6. The process of claim 2, wherein the solvent containing stream added to the bitumen froth comprises at least a portion of the second stage overflow component. 7. The process of claim 6, comprising heating the second stage overflow component prior to using as the solvent containing stream. 8. The process of claim 2, comprising adding a second stage solvent containing stream to the first stage underflow component. 9. The process of claim 1, comprising pre-heating the bitumen froth to produce heated bitumen froth prior to adding the solvent containing stream thereto. 10. The process of claim 9, comprising recirculating a portion of the heated bitumen froth back into the bitumen froth upstream of the pre-heating. 11. The process of claim 1, comprising regulating the flows of the recirculated dilbit component and the returned solvent diluted tailings component in response to the reduction in flow of the bitumen froth. 12. The process of claim 1, wherein the step of separating is performed in a separation apparatus comprising: a first stage separation vessel receiving the diluted bitumen froth and producing a first stage overflow component as the diluted bitumen component and a first stage underflow component;an addition line for adding make-up solvent to the first stage underflow component to produce a diluted first stage underflow component; anda second stage separation vessel receiving the diluted first stage underflow component and producing a second stage underflow component as the solvent diluted tailings components and a second stage overflow component; andwherein the process comprises:(a) recirculating a portion of the first stage overflow component into the bitumen froth as a dilbit recirculation stream;(b) returning a portion of the first stage underflow component into the first stage separation vessel as a first stage return stream;(c) recirculating a portion of the second stage overflow component into the first stage underflow as a second stage recirculation stream; and(d) returning a portion of the second stage underflow component into the second stage separation vessel as a second stage return stream. 13. The process of claim 12, wherein sub-steps (a), (b), (c) and (d) are initiated sequentially. 14. The process of claim 12, wherein in sub-step (a) the dilbit recirculation stream is provided with a flow corresponding to the reduction in the flow of the bitumen froth. 15. The process of claim 12, wherein in sub-step (b) the first stage return stream is returned below an hydrocarbon-water interface within the first stage separation vessel and/or is returned to provide a velocity of the first stage underflow component sufficient to avoid solids settling and asphaltene mat formation. 16. The process of claim 12, wherein in sub-step (c) the second stage recirculation stream is provided with a flow corresponding to the reduction in flow of the first stage underflow component due to the first stage return stream. 17. The process of claim 12, wherein in sub-step (d) the second stage return stream is returned below an hydrocarbon-water interface within the second stage separation vessel and/or is returned to provide a velocity of the second stage underflow component sufficient to avoid solids settling and asphaltene mat formation. 18. The process of claim 12, wherein sub-steps (a) and (c) are performed such that flows of the dilbit recirculation stream and the second stage recirculation stream are sufficient to avoid settling of solids in respective recirculation piping systems. 19. The process of claim 12, comprising sub-step (e) of recycling a portion of the bitumen froth back upstream. 20. The process of claim 19, wherein step (e) is initiated in response to an additional reduction in the flow of the bitumen from below a given flow value. 21. The process of claim 20, wherein the given flow value corresponds to a minimum pump requirement flow for pumping the bitumen froth. 22. The process of claim 12, comprising two parallel trains each comprising at least one of the separation apparatus. 23. The process of claim 12, wherein the bitumen froth treatment operation is a paraffinic froth treatment operation and the solvent is paraffinic solvent. 24. The process of claim 12, wherein the bitumen froth treatment operation is a naphthenic froth treatment operation and the solvent is naphthenic solvent. 25. The process of claim 12, comprising following a control strategy comprising flow control of the bitumen froth, the diluted bitumen component, the first stage underflow component, the second stage overflow component and the solvent diluted tailings component and the make-up solvent to maintain material balance. 26. The process of claim 25, wherein the control strategy comprises acquiring flow measurements of hydrocarbon-rich streams. 27. The process of claim 25, wherein the control strategy comprises acquiring measurements of solvent, bitumen, water and/or mineral content in the solvent diluted froth or the diluted first stage underflow component. 28. The process of claim 25, wherein the control strategy comprises solvent-to-bitumen ratio (S/B) control. 29. The process of claim 28, wherein the S/B control comprises designating a master stream relative to a slave stream. 30. The process of claim 25, wherein the control strategy comprises level control of bitumen froth in a froth tank, first stage separation vessel overflow, first stage separation vessel water-hydrocarbon interface, second stage separation vessel overflow and second stage separation vessel water-hydrocarbon interface. 31. The process of claim 30, wherein the level control comprises adjusting pump speed, adjusting pump discharge valve or adjusting pump bypass recirculation valve or a combination thereof to maintain a stable level. 32. The process of claim 28, comprising controlling the S/B ratio in the diluted froth stream. 33. The process of claim 1, comprising following a control strategy comprising flow control of the bitumen froth, the diluted bitumen component, the solvent diluted tailings component, and the solvent, to maintain material balance. 34. A process for producing bitumen from a bitumen froth treatment operation in turndown mode, comprising: adding a solvent containing stream to bitumen froth to produce diluted bitumen froth;separating the diluted bitumen froth into a diluted bitumen component and a solvent diluted tailings component;producing the bitumen from the diluted bitumen component; andin response to a reduction in flow of the bitumen froth:recirculating a portion of the diluted bitumen component into the bitumen froth as a recirculated dilbit component. 35. A process for producing bitumen from a bitumen froth treatment operation in turndown mode, comprising: adding a solvent containing stream to bitumen froth to produce diluted bitumen froth;separating the diluted bitumen froth into a diluted bitumen component and a solvent diluted tailings component;producing the bitumen from the diluted bitumen component; andin response to a reduction in flow of the bitumen froth:returning a portion of the solvent diluted tailings component into the step of separating as a returned solvent diluted tailings component.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.