[특허]Method and system for treating wastewater

Method and system for treating wastewater 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C02F-001/04 B01D-009/00 B01D-005/00 B01D-021/26 C02F-101/10 C02F-103/10 C02F-101/32
출원번호	US-0746756 (2015-06-22)
등록번호	US-10202286 (2019-02-12)
발명자 / 주소	Ertel, Daniel J. McManus, Kent Bogdan, Jerel
출원인 / 주소	Eureka Resources, LLC
대리인 / 주소	Zeller IP Group, PLLC
인용정보	피인용 횟수 : 0 인용 특허 : 30

초록 ▼

Treating brine to produce distilled water and dried NaCl. The brine enters a crystallization plant and is heated. Once heated, the brine is circulated to an evaporator. The evaporator increases the concentration of NaCl in the brine to a point about the super saturation level. Once above the super saturation level, NaCl crystals are formed. The larger crystals are circulated to a centrifuge for drying and the smaller crystals are recirculated through the evaporator for continued growth. The NaCl crystals are dried in the centrifuge.

대표청구항 ▼

1. A method for treating wastewater comprising: receiving wastewater;screening the received wastewater, said screening comprising: determining a concentration of total dissolved solids (“TDS”) in the received wastewater is greater than 150,000 mg/L;pretreating the screened wastewater, based on the screening, to produce a pretreated wastewater suitable for crystallization/evaporation;feeding the pretreated wastewater into an evaporation/crystallization unit to produce a distilled water, a concentrated brine comprising CaCl2), and a salt slurry comprising NaCl crystals;purifying a first portion of the distilled water to produce a purified water therefrom, said purifying comprising: denitrifying nitrogen compounds in the first portion of the distilled water under anaerobic conditions to produce a denitrified distilled water therefrom;nitrifying additional nitrogen compounds in the denitrified distilled water under aerobic conditions to produce a nitrified distilled water therefrom; andintroducing the nitrified distilled water to a membrane bioreactor comprising a membrane to remove contaminants therefrom and to thereby arrive at a purified water from the membrane bioreactor; andconverting the purified water into a de-wasted water comprising a chemical oxygen demand (“COD”) of less than or equal to 15 mg/L, a methanol concentration of less than or equal to 3.5 mg/L, a nitrite-nitrate nitrogen concentration of less than or equal to 2 mg/L, substantially no oil, a sodium concentration of less than or equal to 25 mg/L, a TDS concentration of less than or equal to 500 mg/L, and a total suspended solids (“TSS”) concentration of less than or equal to 45 mg/L, wherein said converting comprises introducing the purified water to at least one of the group consisting of: an ion exchange system and a reverse osmosis system. 2. The method of claim 1, further comprising: introducing the salt slurry to a centrifuge;washing the salt slurry with a second portion of the distilled water; anddewatering the washed salt slurry in the centrifuge to generate a NaCl product comprising NaCl and a centrate/filtrate. 3. The method of claim 2, further comprising separating the NaCl product from the centrate/filtrate. 4. The method of claim 3, further comprising routing back to the evaporation/crystallization unit the centrate/filtrate remaining after the NaCl product has been separated. 5. The method of claim 4, further comprising mixing the centrate/filtrate with the pretreated wastewater as the pretreated wastewater is fed to the evaporation/crystallization unit. 6. The method of claim 1, wherein the evaporation/crystallization unit produces a vapor comprising water droplets, and further comprising routing the vapor from the evaporation/crystallization unit through a demister to remove the water droplets from the vapor. 7. The method of claim 6, further comprising compressing the vapor to produce a compressed vapor. 8. The method of claim 1, wherein the step of screening the received wastewater further comprises determining a concentration of methanol in the received wastewater is greater than 500 mg/L, and the method further comprises: removing methanol from the screened wastewater, prior to said pretreating the screened wastewater. 9. The method of claim 8, wherein the step of removing methanol comprises processing the screened wastewater in a rectification column. 10. The method of claim 1, wherein the step of screening the received wastewater further comprises determining that the received wastewater is not substantially free of oil, and the method further comprises: removing oil from the screened wastewater, prior to said pretreating the screened wastewater. 11. The method of claim 1, further comprising: introducing the concentrated brine to a second stage thermal mechanical evaporation/crystallization unit to generate a high-purity CaCl2 product. 12. The method of claim 11 further comprising removing lithium from the concentrated brine before introducing the concentrated brine to the second stage thermal mechanical evaporation/crystallization unit. 13. The method of claim 12, wherein the second stage thermal mechanical evaporation/crystallization unit further generates solid crystals comprising one or more of: barium chloride crystals and additional sodium chloride crystals.

이 특허에 인용된 특허 (30)

Mizutani Junji (Suita JPX) Fujita Kozo (Nishinomiya JPX), Aftertreatment method and apparatus for distilled water.
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Goeldner Richard W. (Fort Walton Beach FL), Alkaline scale abatement.
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Keeling, John J.; Tennant, II, Rex B.; Wingard, David B., Brine water recycle process.
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Al-Samadi Riad A.,CAXITX L7T 3H8, High water recovery membrane purification process.
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Hill,Houston E., Method and apparatus for converting spent water-based drilling muds into fertile indigenous top soil.
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Gallot, Jean-Claude, Method for removing dissolved solids from aqueous waste streams.
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Colelli Cam C. (417 Hillcrest Dr. New Philadelphia OH 44663) Mansberry David I. (10092 Hickory Ridge Dr. Brecksville OH 44141), Method for treating and reclaiming oil and gas well working fluids and drilling pits.
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Mudd Robert E. (Cameron LA) Wyatt Wendell L. (Cameron LA), Method for treating oil field wastes containing hydrocarbons.
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Nagghappan, LNSP, Method for treating wastewater or produced water.
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DiTommaso, Frank A.; DiTommaso, Peter N., Method of making pure salt from FRAC-water/wastewater.
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Rey, Paul, Method of treating mine drainage.
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Cort,Steven L., Methods for removing heavy metals from water using chemical precipitation and field separation methods.
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Slabaugh, Billy F.; Karcher, Arron L.; Segura, Michael J. R.; Rosine, Randy S.; Phillippi, Max L.; Harris, Donna L., Mobile systems and methods of sufficiently treating water so that the treated water may be utilized in well-treatment operations.
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Nicksic Stephen W. (Brea CA), Process for clarifying bicarbonate bearing waters using measurement and control of carbon dioxide content.
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Banerjee, Kashi; Blumenschein, Charles D., Process for removing barium from water.
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McLaughlin Ronald J. (Arvada CO), Process for removing heavy metals from water.
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Adams Ernest K. (Brazos County TX), Technique for separating solids from drilling fluids.
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Heins, William F., Treatment of brines for deep well injection.
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Keister, Timothy Edward, Treatment of gas well hydrofracture wastewaters.
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Keister, Timothy Edward, Treatment of gas well hydrofracture wastewaters.
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Keister, Timothy Edward, Treatment of gas well production wastewaters.
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Martin Frank S. (Farmersville OH) Silver Gary L. (Centerville OH), Water treatment method.
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