CN111039460A - Pretreatment process for high-calcium natural gas produced water - Google Patents

Pretreatment process for high-calcium natural gas produced water Download PDF

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CN111039460A
CN111039460A CN201911395910.3A CN201911395910A CN111039460A CN 111039460 A CN111039460 A CN 111039460A CN 201911395910 A CN201911395910 A CN 201911395910A CN 111039460 A CN111039460 A CN 111039460A
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reaction
calcium
natural gas
clarifying
gas produced
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许景媛
李宇
李波
蔡晓波
袁原
王宇
李方清
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ZIGONG LIGHT INDUSTRY DESIGN AND RESEARCH INSTITUTE
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

The invention belongs to the field of wastewater treatment, and relates to a natural gas produced water containing Na+、Sr2+、Ca2+、Mg2+、Cl‑Plasma of various ions, and Na+、Ca2+、Cl‑A pretreatment technology of high-salt-content wastewater with high ion content, in particular to a pretreatment technology of high-calcium natural gas produced water. The process comprises the steps of 1) removing only barium from sodium sulfate; 2) adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying; 3) adding alkali to adjust the pH value to 10-12, and removing calcium and strontium by using sodium carbonate; 4) adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel; 5) after the polyacrylamide solution is added, stirring, standing and clarifying to obtain a pretreatment completion liquid. The process solves the problem that the pretreated sludge is changed from dangerous waste into common solid waste, and solves the problem that the subsequent procedures are led by scaleThe system can not run stably for a long period, and the production cost and the environmental protection pressure of enterprises are reduced.

Description

Pretreatment process for high-calcium natural gas produced water
Technical Field
The invention belongs to the field of wastewater treatment, and relates to a natural gas produced water containing Na+、Sr2+、Ca2+、Mg2+、Cl-Plasma of various ions, and Na+、Ca2+、Cl-A pretreatment technology of high-salt-content wastewater with high ion content, in particular to a pretreatment technology of high-calcium natural gas produced water.
Background
In recent years, with the adjustment of national energy policies, the natural gas industry is rapidly developed, and meanwhile, effective treatment and comprehensive utilization of a large amount of natural gas produced water also become a special concern of governments and related enterprises. Particularly, resource utilization and environmental protection policy are continuously strengthened, so that the risk resistance of the natural gas industry becomes worse and worse due to the discharge of a large amount of high-salt-content natural gas produced water, and the proper treatment of natural gas production wastewater becomes an important part in the natural gas production technology.
The high-salt-content natural gas produced water has the characteristics that the mineralization degree of ① is high, the salt content of ② is high, particularly the content of chloride ions is high, the content of ③ calcium ions and magnesium ions is high, the COD content is high, the content of ④ ammonia nitrogen is high, the content of ⑤ suspended matters exceeds the standard, and the water quality of ⑥ wastewater is acidic.
Na in natural gas produced water+、Sr2+、Ca2+、Mg2+、Cl-And various ions are used as important chemical raw materials. Thus, resource utilization of natural gas produced waterChemical elements, improves the quality of external drainage, and has great environmental benefit, social benefit and certain economic benefit. .
Disclosure of Invention
The invention provides a pretreatment process for high-calcium natural gas produced water according to the technical problems. The process can solve the problem that the pretreated sludge is changed from dangerous waste into common solid waste, solve the problem that a system cannot stably run for a long period due to scaling in subsequent processes, reduce the production cost and the environmental protection pressure of enterprises, and create social benefits and certain economic benefits.
The specific technical scheme of the invention is as follows:
a pretreatment process for high-calcium natural gas produced water comprises the following steps:
1) collecting and deoiling natural gas produced wastewater, conveying the wastewater to a raw water collecting device, and accurately measuring the content of barium sulfate in the wastewater; then pumping the wastewater into a barium mud reaction clarifying barrel, adding sodium sulfate, and stirring for reaction.
The raw water collecting device can be a raw water collecting barrel or a raw water collecting tank.
Preferably, the stirring reaction time in the step is 30-40 min; the addition amount of the sodium sulfate is 1.0-1.1 times of the theoretical reaction amount except barium.
2) After the reaction in the step 1) is finished, adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying.
Preferably, the standing clarification time in the step is 2h, and the dosage of the polyacrylamide solution is 2-4 ppm.
3) Conveying the supernatant after standing to a calcium-magnesium reaction clarifying barrel, and adding alkali to adjust the pH value to 10-12; then sodium carbonate is added to the mixture to carry out stirring reaction.
Preferably, the alkali is sodium hydroxide, and the stirring reaction time is 30-40 min; the addition amount of the sodium carbonate is 1.0 to 1.1 times of the theoretical reaction amount of the generated calcium carbonate and strontium carbonate by mass.
4) After full reaction, adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel; in the step, the dosage of the polyacrylamide solution is 2-4 ppm.
5) And (3) after the polyacrylamide solution is added, fully stirring, standing and clarifying to obtain a pretreatment completion liquid.
Preferably, the standing and clarifying time in the step is 2 h.
In the process, the raw water collecting device and the slurry deposited at the bottom of the barium mud reaction clarifying barrel enter the calcium-magnesium reaction clarifying barrel together; mother liquor of the desalting and evaporating process enters a mother liquor separation barrel for separation; the slag mud after reaction and deposition in the calcium-magnesium reaction clarifying barrel and the slurry separated from the mother liquor separation barrel enter a plate-and-frame filter press together for filter pressing, and the substances after filter pressing can be directly stacked; the rest materials in the mother liquor separation barrel can be directly subjected to a spray drying process.
The positive effects of the invention are as follows:
the process has the advantages of reasonable process, stable effluent quality, difficult scaling in the subsequent evaporation process, long-period stable operation, greatly reduced operation cost, capability of realizing comprehensive utilization of resources, changing waste into valuable and good economic benefit and environmental benefit.
(II) removing harmful element Ba in the wastewater2+And the risk that the high-salt-content wastewater pretreatment slag sludge forms dangerous solid waste is solved.
(III) removing Sr in the wastewater as much as possible2+、Mg2+Plasma is carried out, and meanwhile, dosing residue and the like are reduced as much as possible, so that the influence of unstable operation caused by scaling of insoluble substances in the subsequent evaporation concentration process is reduced; in the water quality with a plurality of ions interfering with each other, a reasonable pretreatment process and a proper amount of chemical addition are selected, so that the aims of achieving a pretreatment target value and reducing the production cost are fulfilled.
And (IV) by adopting a proper dosing formula, the medicine consumption is reduced, the cost is reduced, chemical elements in the natural gas produced water are recycled, and the quality of external drainage is improved.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, but it should not be construed that the scope of the above-described subject matter of the present invention is limited to the following examples.
In the following examples, it is described that raw water is a substance obtained by removing oil from natural gas production wastewater collected in a collection tank in a concentrated manner, and the main water quality index data is as follows:
deyang XX raw water main water quality index data
Figure BDA0002346304040000041
The percentages used in the following examples are in wt% unless otherwise specified. The related sodium sulfate is anhydrous sodium sulfate, and the mass concentration of the sodium sulfate is 99%. The theoretical reaction quantities are also the theoretical reaction masses. The polyacrylamide solution is a commercial product.
Example 1:
a pretreatment process for high-calcium natural gas produced water comprises the following steps:
1) collecting 0.3L of natural gas extraction wastewater after centralized oil removal to a raw water collecting barrel, and accurately measuring the content of barium ions in the wastewater to 1750 mg/L; and pumping the wastewater into a barium mud reaction clarifying barrel, adding sodium sulfate, and then carrying out stirring reaction, wherein the addition amount of the sodium sulfate is 1.0 time of the theoretical reaction amount for removing barium, and the stirring reaction time is 30min, and the pH value is 7.75 at the moment.
2) After the reaction in the step 1) is finished, adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying for 2 hours. The amount of the polyacrylamide solution added was 2 ppm.
3) Conveying the supernatant after standing to a calcium-magnesium reaction clarifying barrel, and adding sodium hydroxide to adjust the pH value to 10; adding sodium carbonate, and stirring for reaction for 30 min; sodium carbonate was added in an amount of 1.05 times the theoretical reaction amount of calcium carbonate and strontium carbonate.
4) After full reaction, adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel; in this step, the amount of the polyacrylamide solution added was 2 ppm.
5) And (3) after the polyacrylamide solution is added, fully stirring, standing and clarifying for 2 hours to obtain a pretreatment completion solution.
And (3) desalting the pretreated liquid, and dehydrating the barium mud and the calcium-magnesium mud generated in the pretreatment process by a plate-and-frame filter press or other dehydration equipment to be treated as common solid wastes.
Detecting the pretreatment completion liquid obtained in the step 5), wherein the specific results are as follows:
Figure BDA0002346304040000051
example 2:
a pretreatment process for high-calcium natural gas produced water comprises the following steps:
1) collecting 0.3L of natural gas extraction wastewater after centralized oil removal to a raw water collecting barrel, and accurately measuring the content of barium ions in the wastewater to 1750 mg/L; and pumping the wastewater into a barium mud reaction clarifying barrel, adding sodium sulfate, and then carrying out stirring reaction, wherein the addition amount of the sodium sulfate is 1.1 times of the theoretical reaction amount for removing barium, and the stirring reaction time is 30min, and the pH value is 8.02 at the moment.
2) After the reaction in the step 1) is finished, adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying for 2 hours. The amount of the polyacrylamide solution added was 2 ppm.
3) Conveying the supernatant after standing to a calcium-magnesium reaction clarifying barrel, and adding sodium hydroxide to adjust the pH value to 12; and then adding sodium carbonate, stirring and reacting, wherein the sodium carbonate is added according to 1.05 times of the theoretical reaction quantity of the generated calcium carbonate and strontium carbonate, and the reaction time is 30 min.
4) After full reaction, adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel; in this step, the amount of the polyacrylamide solution added was 2 ppm.
5) And (3) after the polyacrylamide solution is added, fully stirring, standing and clarifying for 2 hours to obtain a pretreatment completion solution.
And (3) desalting the pretreated liquid, and dehydrating the barium mud and the calcium-magnesium mud generated in the pretreatment process by a plate-and-frame filter press or other dehydration equipment to be treated as common solid wastes.
Detecting the pretreatment completion liquid obtained in the step 5), wherein the specific results are as follows:
Figure BDA0002346304040000052
Figure BDA0002346304040000061
example 3:
a pretreatment process for high-calcium natural gas produced water comprises the following steps:
1) collecting 0.3L of natural gas extraction wastewater after centralized oil removal to a raw water collecting barrel, and accurately measuring the content of barium ions in the wastewater to 1750 mg/L; and pumping the wastewater into a barium mud reaction clarifying barrel, adding sodium sulfate, and then carrying out stirring reaction, wherein the addition amount of the sodium sulfate is 1.1 times of the theoretical reaction amount for removing barium, and the stirring reaction time is 30 min.
2) After the reaction in the step 1) is finished, adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying for 2 hours. The polyacrylamide solution was added in an amount of 2ppm, at which time the pH was 8.02.
3) Conveying the supernatant after standing to a calcium-magnesium reaction clarifying barrel, and adding sodium hydroxide to adjust the pH value to 10; and then adding sodium carbonate for stirring reaction, wherein the sodium carbonate is added according to 1.05 times of the theoretical reaction quantity of the generated calcium carbonate and strontium carbonate, and the reaction time is 30 min.
4) After full reaction, adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel; in this step, the amount of the polyacrylamide solution added was 2 ppm.
5) And (3) after the polyacrylamide solution is added, fully stirring, standing and clarifying for 2 hours to obtain a pretreatment completion solution.
And (3) desalting the pretreated liquid, and dehydrating the barium mud and the calcium-magnesium mud generated in the pretreatment process by a plate-and-frame filter press or other dehydration equipment to be treated as common solid wastes.
Detecting the pretreatment completion liquid obtained in the step 5), wherein the specific results are as follows:
Figure BDA0002346304040000062
comparative example 1:
1) collecting natural gas produced wastewater after centralized oil removal to a raw water collecting barrel, and accurately measuring the content of barium ions in the wastewater to 1750 mg/L; and pumping the wastewater into a barium mud reaction clarifying barrel, adding sodium sulfate, stirring and reacting, wherein the addition amount of the sodium sulfate is 1.0 time of the amount of the barium and strontium removed, and the reaction time is 30 min.
2) After the reaction in the step 1) is finished, adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying for 2 hours. The amount of the polyacrylamide solution added was 2 ppm.
3) Conveying the supernatant after standing to a calcium-magnesium reaction clarifying barrel, and adding sodium hydroxide to adjust the pH value to 10; then sodium carbonate is added for stirring reaction, the addition amount of the sodium carbonate is 1.05 times of the theoretical addition amount, and the reaction time is 30 min.
4) After full reaction, adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel; in this step, the amount of the polyacrylamide solution added was 2 ppm.
5) And (3) after the polyacrylamide solution is added, fully stirring, standing and clarifying for 2 hours to obtain a pretreatment solution.
And (3) desalting the pretreated liquid, and dehydrating the barium mud and the calcium-magnesium mud generated in the pretreatment process by a plate-and-frame filter press or other dehydration equipment to be treated as common solid wastes.
The pretreatment solution is detected, and the specific results are as follows:
barium strontium removal with sodium sulfate results:
Figure BDA0002346304040000071
calcium and magnesium removal by sodium carbonate results:
Figure BDA0002346304040000072
from the above data, it can be seen that sulfate is overproof.
Comparative example 2:
1) collecting natural gas produced wastewater after centralized oil removal to a raw water collecting barrel, and accurately measuring the content of barium ions in the wastewater to 1750 mg/L; then pumping the wastewater into a barium mud reaction clarifying barrel, adding sodium sulfate which is 2.0 times of the amount of barium and strontium removed, and then carrying out stirring reaction for 30 min.
2) After the reaction in the step 1) is finished, adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying for 2 hours. The amount of the polyacrylamide solution added was 2 ppm.
3) Conveying the supernatant after standing to a calcium-magnesium reaction clarifying barrel, and adding sodium hydroxide to adjust the pH value to 9.4; then sodium carbonate is added to be 1.05 times of the theoretical addition amount, and then stirring reaction is carried out for 30 min.
4) After full reaction, adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel; in this step, the amount of the polyacrylamide solution added was 2 ppm.
5) And (3) after the polyacrylamide solution is added, fully stirring, standing and clarifying for 2 hours to obtain a pretreatment completion solution.
And (3) desalting the pretreated liquid, and dehydrating the barium mud and the calcium-magnesium mud generated in the pretreatment process by a plate-and-frame filter press or other dehydration equipment to be treated as common solid wastes.
The pretreatment completion liquid is detected, and the specific results are as follows:
barium strontium removal with sodium sulfate results:
Figure BDA0002346304040000081
calcium and magnesium removal by sodium carbonate results:
Figure BDA0002346304040000082
from the above data, it can be seen that sulfate is overproof.
Experiment 1: sodium sulfate addition amount experiment:
taking 3 parts of 0.3L of natural gas produced wastewater subjected to oil removal as raw water, and accurately measuring the content of barium ions in each part of wastewater to be 1750 mg/L; then, anhydrous sodium sulfate (99%) was added in an amount of 0.9 times, 1.0 times and 1.1 times the theoretical reaction amount of sodium sulfate calculated by the standard solubility product of barium sulfate, respectively, and the mixture was stirred and mixed for reaction for 15 minutes. After the reaction is finished, adding polyacrylamide for flocculation, wherein the addition amount of the polyacrylamide is 2ppm, standing and settling for 2 hours, and then taking the supernatant to be sent to a sample for analysis and detection. The data are shown in the following table:
Figure BDA0002346304040000091
experiment 2: experiment of sodium sulfate addition amount during barium strontium removal and calcium precipitation
2 portions of 0.3L raw water is taken, anhydrous sodium sulfate (99 percent) is added according to the sum of the theoretical reaction amount of removing barium sodium sulfate and the dosage of removing strontium sodium sulfate which is 1.0 time and 2.0 times of the standard solubility product, and the mixture is stirred, mixed and reacted for 15 minutes. After the reaction is finished, adding 2ppm polyacrylamide for flocculation, standing and settling for 2h, and taking the supernatant for sample analysis and detection. The data are shown in the following table:
Figure BDA0002346304040000092
experiment 3: experiment for removing addition amount of barium strontium and strontium to target concentration of sodium sulfate
2 portions of 0.3L raw water is taken, anhydrous sodium sulfate (99 percent) is added according to the sum of the theoretical reaction amount of removing barium sodium sulfate and the dosage of removing calcium strontium sodium sulfate which is 1.0 and 2.0 times of the standard solubility product, and the mixture is stirred, mixed and reacted for 15 minutes. After the reaction is finished, adding 2ppm polyacrylamide for flocculation, standing and settling for 2h, and taking the supernatant for sample analysis and detection. The data are shown in Table 4:
TABLE 4 experiments on target concentration of barium strontium to strontium
Figure BDA0002346304040000101
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The pretreatment process for the high-calcium natural gas produced water is characterized by comprising the following steps of:
1) collecting natural gas production wastewater into a raw water collecting device, and measuring the content of barium chloride in the wastewater; then pumping the wastewater into a barium mud reaction clarifying barrel, adding sodium sulfate, and stirring for reaction;
2) after the reaction in the step 1) is finished, adding a polyacrylamide solution into a barium mud reaction clarifying barrel, fully stirring, standing and clarifying;
3) conveying the supernatant after standing to a calcium-magnesium reaction clarifying barrel, and adding alkali to adjust the pH value to 10-12; then adding sodium carbonate and stirring for reaction;
4) after full reaction, adding a polyacrylamide solution into a calcium-magnesium reaction clarifying barrel;
5) and (3) after the polyacrylamide solution is added, fully stirring, standing and clarifying to obtain a pretreatment completion liquid.
2. The pretreatment process for high-calcium natural gas produced water according to claim 1, wherein: the stirring reaction time in the step 1) is 30-40min, and the addition amount of the sodium sulfate is 1.0-1.1 times of the theoretical reaction amount of barium removal by mass.
3. The pretreatment process for high-calcium natural gas produced water according to claim 1, wherein: in the step 2), the dosage of the polyacrylamide solution is 2-4ppm, and the standing and clarifying time is 2-3 h.
4. The pretreatment process for high-calcium natural gas produced water according to claim 1, wherein: the alkali in the step 3) is sodium hydroxide.
5. The pretreatment process for high-calcium natural gas produced water according to claim 1, wherein: and 3) adding sodium carbonate in the step 3), and then carrying out stirring reaction for 30-40min, wherein the adding amount of the sodium carbonate is 1.0-1.1 times of the theoretical reaction amount of the generated calcium carbonate and strontium carbonate.
6. The pretreatment process for high-calcium natural gas produced water according to claim 1, wherein: the dosage of the polyacrylamide solution in the step 4) is 2-4 ppm.
7. The pretreatment process for high-calcium natural gas produced water according to claim 1, wherein: standing and clarifying for 2-3h in the step 5).
8. The pretreatment process for high-calcium natural gas produced water according to claim 1, wherein: and 5) carrying out a desalting process on the pretreated liquid, and dehydrating the barium mud and the calcium-magnesium mud generated in the pretreatment process by using a plate-and-frame filter press or other dehydration equipment to be treated as common solid wastes.
CN201911395910.3A 2019-12-30 2019-12-30 Pretreatment process for high-calcium natural gas produced water Pending CN111039460A (en)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
CN102574022A (en) * 2009-06-25 2012-07-11 弗拉克普尔控股有限责任公司 Method of making pure salt from frac-water/wastewater
WO2015157118A1 (en) * 2014-04-07 2015-10-15 Cameron Solutions Inc. Divalent ion removal from monoethylene glycol-water streams
CN105000726A (en) * 2015-09-02 2015-10-28 波鹰(厦门)科技有限公司 Method for treating and recycling high-salt oil-field wastewater
CN106458672A (en) * 2014-03-07 2017-02-22 通用电气公司 Method for barium and norm removal from produced water
EP3188851A1 (en) * 2014-09-04 2017-07-12 University Of The Free State Mine drainage remediation using barium carbonate dispersed alkaline substrate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102574022A (en) * 2009-06-25 2012-07-11 弗拉克普尔控股有限责任公司 Method of making pure salt from frac-water/wastewater
CN106458672A (en) * 2014-03-07 2017-02-22 通用电气公司 Method for barium and norm removal from produced water
WO2015157118A1 (en) * 2014-04-07 2015-10-15 Cameron Solutions Inc. Divalent ion removal from monoethylene glycol-water streams
EP3188851A1 (en) * 2014-09-04 2017-07-12 University Of The Free State Mine drainage remediation using barium carbonate dispersed alkaline substrate
CN105000726A (en) * 2015-09-02 2015-10-28 波鹰(厦门)科技有限公司 Method for treating and recycling high-salt oil-field wastewater

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