Compact evaporator for modular portable SAGD process
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-001/08
B01D-001/22
B01D-001/28
B01D-003/02
B01D-003/28
C02F-001/08
C02F-001/18
B01D-001/06
B01D-001/30
C02F-001/04
출원번호
US-0087708
(2011-04-15)
등록번호
US-8951392
(2015-02-10)
발명자
/ 주소
James, Kenneth
출원인 / 주소
1nSite Technologies Ltd.
대리인 / 주소
Fay Sharpe LLP
인용정보
피인용 횟수 :
2인용 특허 :
20
초록▼
A modular portable evaporator system for use in a Steam Assisted Gravity Drainage (SAGD) systems having an evaporator, with a sump including an oil skimming weir, a short tube vertical falling film heat exchanger including an outer shell containing short tubes provided for lower water circulation ra
A modular portable evaporator system for use in a Steam Assisted Gravity Drainage (SAGD) systems having an evaporator, with a sump including an oil skimming weir, a short tube vertical falling film heat exchanger including an outer shell containing short tubes provided for lower water circulation rate. The system further having external to the evaporator, a compressor for compressing evaporated steam from the tube side of the heat exchanger and routing to the shell side of the same exchanger, a distillate tank to collect hot distilled water, a recirculation pump to introduce liquids from the sump into the heat exchanger and an external suction drum protecting the compressor from liquid impurities. The evaporator system receives produced water from the SAGD process into the sump and provides cleaned hot water to a boiler.
대표청구항▼
1. A method for purification of water in a Steam Assisted Gravity Discharge (SAGD) system using a compact evaporator system comprising the steps of: a) providing a compact evaporator system comprising a sump including an oil skimming weir, a vertical falling film heat exchanger including tubes, a co
1. A method for purification of water in a Steam Assisted Gravity Discharge (SAGD) system using a compact evaporator system comprising the steps of: a) providing a compact evaporator system comprising a sump including an oil skimming weir, a vertical falling film heat exchanger including tubes, a compressor, having an inlet and an outlet, the compressor outlet being for injecting compressed steam into the heat exchanger, a distillate tank for collecting hot distilled water from the heat exchanger, and a recirculation pump located between the sump and the heat exchanger, wherein the evaporator system receives produced water from the SAGD system into the sump and produces water for feed to a boiler,b) introducing a produced water and a make-up water into the sump of the compact evaporator system,c) collecting residual water from the falling film heat exchanger into the sump,d) pumping the liquid from the sump of the evaporator into a top of a tube side of the falling film heat exchanger,e) collecting steam created in the evaporator sump on the tube side of the heat exchanger and routing said steam into a suction drum of the compressor,f) compressing the steam from the compressor suction drum and routing said steam to a shell side of the heat exchanger,g) collecting the condensed steam from the shell side of the heat exchanger into the distillate tank,h) skimming a top layer of a brine comprising oil and other impurities via the weir positioned in the evaporator sump,i) transferring the skimmed brine to a brine storage,j) using the water from the distillate tank to: i) feed water to the boiler or ii) recycle back to the evaporator sump, wherein the tube has i) a maximum height such that when evaporating water from brine, solids do not substantially precipitate out, ii) a minimum height such that brine is distributed substantially evenly through the tubes, and iii) a maximum height such that the system is transportable. 2. The method of claim 1 further comprising the step of controlling a silica solubility in a circulating liquid. 3. The method of claim 2 wherein the step of controlling silica solubility includes adjusting a pH of the circulating liquid. 4. The method of claim 3 wherein the pH is adjusted by adding at least one chemical solvent to the circulating liquid. 5. The method of claim 1 further comprising controlling a hardness of a circulating liquid. 6. The method of claim 5 wherein the step of controlling the hardness of the circulating liquid includes adjusting a brine blow down rate. 7. The method of claim 1 wherein the heat exchanger is a first heat exchanger and further including: providing a second falling film heat exchanger;receiving produced water from the SAGD process into the sump of the first heat exchanger which provides water to the boiler; andwherein the sump of the first heat exchanger has a lower concentration of impurities than does a sump of the second heat exchanger. 8. The method of claim 7 further including increasing a capacity of the compact evaporator system. 9. The method of claim 7 further including reducing a loading of the compressor of the compact evaporator system. 10. The method of claim 7 including: skimming contaminants from the sump of the first heat exchanger,transferring the contaminants into the sump of the second heat exchanger,maintaining a concentration of impurities in the first heat exchanger lower than a concentration of impurities in the second heat exchanger. 11. A method for purification of water in a Steam Assisted Gravity Discharge (SAGD) system using a compact evaporator system comprising the steps of: a) providing a compact evaporator system including two vertical falling film heat exchangers each including tubes and a sump, a compressor for circulating steam into both heat exchangers, a compressor suction drum for protecting the compressor from entrained liquid contamination, a distillate tank for collecting hot distilled water produced from the vapor from the heat exchangers, a recirculation pump for circulating brine from the evaporator sump of each of the heat exchangers back to the heat exchangers, wherein the compact evaporator system receives produced water from the SAGD process and make-up water which are fed into the evaporator sump of the respective heat exchanger for providing water to feed a boiler;b) introducing a produced water and a make-up water into the sumps of each heat exchanger of the compact evaporator system;c) collecting residual water from each of the falling film heat exchangers into the respective sump,d) pumping the liquid from the sump of each falling film heat exchanger into a top of a tube side of each of the falling film heat exchangers;e) collecting steam created in the evaporator sump on the tube side of each heat exchanger and routing said steam into the suction drum;f) compressing the steam from the suction drum via the compressor and routing said steam to a shell side of each heat exchanger;g) collecting the condensed steam from the shell side of each heat exchanger into the distillate tank;h) skimming a top layer of a brine comprising oil and other impurities via a weir positioned in the respective sump of each heat exchanger;i) transferring the skimmed brine to a brine storage; andj) using the water from the distillate tank to: i) feed water to the boiler or ii) recycle water back to the evaporator sump of the respective heat exchanger, wherein the tube has i) a maximum height such that when evaporating water from brine, solids do not substantially precipitate out, ii) a minimum height such that brine is distributed substantially evenly through the tubes, and iii) a maximum height such that the system is transportable. 12. The method of claim 11 further including transferring contaminants skimmed from the sump of the first evaporator into the sump of the second evaporator. 13. The method of claim 12 further including maintaining a concentration of impurities in the first heat exchanger lower than a concentration of impurities in the second heat exchanger. 14. The method of claim 11 including controlling a silica solubility in a circulating liquid by adjusting a pH thereof. 15. The method of claim 14 further including controlling a hardness of the circulating liquid.
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