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公开(公告)号：US10807895B2
公开(公告)日：2020-10-20
申请号：US16092238
申请日：2017-04-11
IPC分类号： C02F9/00 , E21B43/34 , C02F1/04 , C02F1/28 , C02F1/38 , C02F1/52 , C02F101/10 , C02F101/32 , C02F103/10
摘要： The present invention relates to a process that uses one or more evaporators to treat produced water containing silica. To address silica scaling, a crystallizing reagent is mixed with the produced water upstream of the evaporator. The crystallizing reagent is designed to precipitate a silica adsorbing compound such as magnesium hydroxide. The feedwater with the adsorbed silica is directed to an evaporator that produces a distillate and a concentrate containing the adsorbed silica. At least a portion of the concentrate having the silica adsorbing compound is directed to a separator that separates the silica adsorbing compound from the concentrate and recycles it back to where it is mixed with the produced water.
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公开(公告)号：US11027999B2
公开(公告)日：2021-06-08
申请号：US16550805
申请日：2019-08-26
IPC分类号： C02F9/00 , B01D9/00 , C02F1/04 , C02F1/28 , C02F1/44 , C01D5/16 , C01D3/06 , C02F1/52 , C02F101/10 , C02F101/12 , C02F103/36
摘要： A process for treating wastewater or waste brines that include sodium and chloride ions. The waste brine is concentrated and thereafter directed to a Mirabilite crystallizer that produces hydrated sulfate salt crystals and a first solution. The hydrated crystals are melted to form an aqueous sulfate solution that is directed to a sodium sulfate crystallizer which produces sodium sulfate salt crystals. The first solution produced by the Mirabilite crystallizer is directed to a nanofiltration device which produces a permeate stream and a reject stream containing sulfate removed by the nanofiltration device. The permeate stream is directed to a sodium chloride crystallizer that produces sodium chloride salt crystals. The reject stream is recycled to the Mirabilite crystallizer.
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公开(公告)号：US20190382291A1
公开(公告)日：2019-12-19
申请号：US16550805
申请日：2019-08-26
摘要： A process for treating wastewater or waste brines that include sodium and chloride ions. The waste brine is concentrated and thereafter directed to a Mirabilite crystallizer that produces hydrated sulfate salt crystals and a first solution. The hydrated crystals are melted to form an aqueous sulfate solution that is directed to a sodium sulfate crystallizer which produces sodium sulfate salt crystals. The first solution produced by the Mirabilite crystallizer is directed to a nanofiltration device which produces a permeate stream and a reject stream containing sulfate removed by the nanofiltration device. The permeate stream is directed to a sodium chloride crystallizer that produces sodium chloride salt crystals. The reject stream is recycled to the Mirabilite crystallizer.
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公开(公告)号：US10434435B2
公开(公告)日：2019-10-08
申请号：US16086327
申请日：2017-03-14
发明人： Benjamin S. Mack
IPC分类号： B01D1/14 , B01D1/28 , B01D3/00 , B01D3/06 , B01D3/10 , B01D5/00 , B01D19/00 , C02F1/04 , C02F1/06 , C02F1/10
摘要： An evaporation system employs a thermocompressor to recover heat associated with a distillate produced by an evaporator and to use the recovered heat to preheat evaporator feedwater. In one example, the thermocompressor produces a thermocompressor discharge that is directed into the deaerator, contacting and preheating the evaporator feedwater passing therethrough. In another example, the thermocompressor discharge is directed through a barometric condenser which contacts evaporator feedwater therein and condenses and in the process preheats the evaporator feedwater.
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公开(公告)号：US10392748B2
公开(公告)日：2019-08-27
申请号：US15302514
申请日：2014-04-11
发明人： Ivan Ramos Ruiz
摘要： Wood pulping process including pulping wood to produce a pulping effluent or liquor. Pre-concentrating the liquor in a pre-concentration unit produces concentrated liquor, a contaminated condensate and a non-contaminated condensate. Directing the concentrated liquor to a multi-effect train of forced circulation solids concentrators that further concentrating the concentrated liquor to form a highly concentrated liquor. Directing the contaminated condensate produced by the pre-concentration unit to a steam stripper and stripping gases therefrom and in the process producing a contaminated vapor stream. Utilizing the contaminated vapor stream and its thermal energy to power the forced circulation solids concentrators of the multi-effect train.
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公开(公告)号：US10132153B2
公开(公告)日：2018-11-20
申请号：US14829742
申请日：2015-08-19
发明人： Mark C. Nicholson
IPC分类号： B01D17/02 , C02F1/04 , E21B43/40 , C02F1/20 , C02F1/06 , E21B43/24 , B01D17/06 , C02F1/40 , C02F103/10 , C02F103/36
摘要： An oil recovery process includes recovering an oil-water mixture from an oil-bearing formation and separating the produced water from the oil-water mixture. The produced water includes dissolved gases and the method includes heating and pressurizing the produced water. After the produced water is heated and pressurized, it is flash vaporized through a lesser pressure which produces a vapor and residual produced water. The flash vaporization of the produced water evaporates dissolved gases and the dissolved gases are vented away with the vapor.
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7.发明申请SYSTEM AND METHOD FOR TREATING PRODUCED WATER HAVING A FLASH VAPORIZATION SYSTEM FOR REMOVING DISSOLVED GASES FROM PRODUCED WATER 审中-公开用于处理生产水的生产水的系统和方法，用于从生产的水中除去溶解的气体的闪蒸系统公开(公告)号：US20160053601A1
公开(公告)日：2016-02-25
申请号：US14829742
申请日：2015-08-19
发明人： Mark C. Nicholson
CPC分类号： E21B43/40 , B01D17/02 , B01D17/06 , C02F1/048 , C02F1/06 , C02F1/20 , C02F1/40 , C02F2103/10 , C02F2103/365 , E21B43/2406
摘要： An oil recovery process includes recovering an oil-water mixture from an oil-bearing formation and separating the produced water from the oil-water mixture. The produced water includes dissolved gases and the method includes heating and pressurizing the produced water. After the produced water is heated and pressurized, it is flash vaporized through a lesser pressure which produces a vapor and residual produced water. The flash vaporization of the produced water evaporates dissolved gases and the dissolved gases are vented away with the vapor.
摘要翻译： 油回收方法包括从含油地层中回收油 - 水混合物并将所产生的水与油 - 水混合物分离。 所生产的水包括溶解的气体，该方法包括对所产生的水进行加热和加压。 在产生的水被加热和加压之后，它通过较小的压力而闪蒸，产生蒸汽和残留的产生的水。 产生的水的闪蒸蒸发蒸发溶解的气体，溶解的气体与蒸汽一起排出。
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公开(公告)号：US20220281764A1
公开(公告)日：2022-09-08
申请号：US17628435
申请日：2020-07-22
发明人： Mark C. Nicholson , Corey Skadahl
摘要： The present invention entails dual centrifuges configured to remove suspended solids, silica, and other precipitants from evaporator brine prior to the brine being disposed of via deep well injection. First, the evaporator brine is directed through a highly efficient first centrifuge configured to remove essentially all suspended solids, including very small suspended solids that typically cannot be retained in a filter or other dewatering devices. The centrate from the first centrifuge, depleted in suspended solids, silica and other precipitants, can be disposed of via deep well injection. The first centrifuge also produces a slurry that is directed to a separate centrifuge that produces a second centrate and waste wet cake. The second centrate is recycled and mixed with the evaporator brine and the mixture is directed to the first centrifuge.
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公开(公告)号：US20210230036A1
公开(公告)日：2021-07-29
申请号：US17253220
申请日：2020-12-04
发明人： Mark C. Nicholson
IPC分类号： C02F9/00
摘要： The present invention relates to a process for removing dissolved silica from a high pH brine produced by an evaporator employed in treating a waste stream. The high pH brine is directed to a crystallizer reactor and an acid or CO2 is mixed therewith to reduce the pH of the brine, causing the silica in the brine to precipitate. The brine is then directed to a first solids-liquid separator which produces a slurry containing the precipitated silica. The slurry is split into first and second streams with one stream recycled to the crystallizer reactor while the other slurry stream is directed to a second solids-liquid separator which produces a wet cake containing the silica solids.
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公开(公告)号：US10773969B1
公开(公告)日：2020-09-15
申请号：US16468436
申请日：2017-11-22
摘要： A method of producing potassium sulfate by employing sodium sulfate and potassium chloride sources is disclosed. The method includes a crystallization process that yields a mother liquor containing sulfate, sodium and chloride. The mother liquor is directed to an anion segregation unit that produces a reject or retentate rich in sulfate which is recycled and employed in the production of the potassium sulfate. Further, the anion segregation unit produces a permeate that is depleted in sulfate but includes sodium and chloride and is directed to a sodium chloride crystallizer for producing sodium chloride.
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