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Composite treating agent for waste water treatment of oil and gas fields

A composite treatment and wastewater treatment technology, which is applied in mining wastewater treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of difficult treatment, impact, and increase the difficulty of wastewater treatment, and achieve obvious results

Active Publication Date: 2018-05-18
CHONGQING VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially oil and gas field wastewater containing chloride ions can be as high as 30,000 mg/l, which has caused serious interference and impact on mercury removal and organic pollutant removal processes
Mercury removal, removal of organic pollutants and high c

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composite treatment agent raw material of this embodiment includes the following components by weight: 10 parts of polydimethyldiallylammonium chloride, 5 parts of polyaspartic acid, 8 parts of modified polyacrylamide, bis-dithio 5 parts of chitosan grafted with carbamic acid, 1 part of hexadecyltrimethylammonium bromide, 3 parts of nanoscale iron filings, 3 parts of methanol, 3 parts of sodium bentonite, 4 parts of SA630 heavy metal collector, polymerized 3 parts of aluminum sulfate, 1 part of sulfur-loaded activated carbon pellets, and 1 part of oxidant.

[0022] In this embodiment, the oxidizing agent is chlorine dioxide and sodium hypochlorite.

[0023] In this embodiment, the modified polyacrylamide is prepared in the following manner:

[0024] After polyacrylamide is made into a solution with a concentration of 1% in distilled water and fully dissolved, keep the temperature in a constant temperature water bath to 50°C, add sodium hydroxide with a concentratio...

Embodiment 2

[0027] The composite treatment agent raw material of this embodiment includes the following components by weight: 20 parts of polydimethyldiallyl ammonium chloride, 10 parts of polyaspartic acid, 12 parts of modified polyacrylamide, bis-dithio 10 parts of chitosan grafted with carbamic acid, 5 parts of hexadecyltrimethylammonium bromide, 6 parts of nanoscale iron filings, 6 parts of methanol, 6 parts of sodium bentonite, 8 parts of SA630 heavy metal collector, polymerized 5 parts of aluminum sulfate, 3 parts of sulfur-loaded activated carbon pellets, and 2 parts of oxidizing agent.

[0028] In this embodiment, the oxidizing agent is chlorine dioxide and sodium hypochlorite.

[0029] In this embodiment, the modified polyacrylamide is prepared in the following manner:

[0030] After polyacrylamide is made into a solution with a concentration of 1% in distilled water and fully dissolved, keep the temperature in a constant temperature water bath to 55°C, add sodium hydroxide with...

Embodiment 3

[0033] The composite treatment agent raw material of this embodiment includes the following components by weight: 10 parts of polydimethyldiallylammonium chloride, 10 parts of polyaspartic acid, 8 parts of modified polyacrylamide, bis-dithio 10 parts of chitosan grafted with carbamic acid, 1 part of hexadecyltrimethylammonium bromide, 6 parts of nanoscale iron filings, 3 parts of methanol, 6 parts of sodium bentonite, 4 parts of SA630 heavy metal collector, polymerized 5 parts of aluminum sulfate, 1 part of sulfur-loaded activated carbon pellets, and 2 parts of oxidizing agent.

[0034] In this embodiment, the oxidizing agent is chlorine dioxide and sodium hypochlorite.

[0035] In this embodiment, the modified polyacrylamide is prepared in the following manner:

[0036] After polyacrylamide is made into a solution with a concentration of 1% in distilled water and fully dissolved, keep the temperature in a constant temperature water bath to 50°C, add sodium hydroxide with a c...

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PUM

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Abstract

The invention discloses a composite treating agent for waste water treatment of oil and gas fields. The composite treating agent is characterized by comprising, by weight, 10-20 parts of poly dimethyldiallyl ammonium chloride, 5-10 parts of polyaspartic acid, 8-12 parts of modified polyacrylamide, 5-10 parts of dithiocarbamic acid grafted chitosan, 1-5 parts of hexadecyl trimethyl ammonium bromide, 3-6 parts of nano scrap iron, 3-6 parts of methyl alcohol, 3-6 parts of sodium-based bentonite, 4-8 parts of SA630 heavy metal collectors, 3-5 parts of polyaluminium sulfate, 1-3 parts of sulfur-carrying activated carbon balls and 1-2 parts of oxidizing agents. The composite treating agent has the advantages that colloids are agglomerated, deposited and separated under the action of charge neutralization, adsorption bridging and enrichment, oil, nitrates, heavy metal ions and suspended solids in sewage are removed, the composite treating agent has obvious removal effect on toxic and harmfulsubstances such as inorganic mercury and alkyl mercury in the waste water of the oil and gas fields, majority of the mercury in original water can be removed effectively, organic matters difficult todegrade in the waste water are degraded, and the composite treating agent is not likely to cause secondary pollution to the environment.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a composite treatment agent used for oil and gas field wastewater treatment. Background technique [0002] The production wastewater in the process of oil and gas field development contains inorganic mercury and alkylmercury, as well as refractory organic pollutants such as petroleum, sulfides, salts and minerals. Chemical additives make the composition of oil and gas field wastewater very complex. In particular, the chlorine ion content in oil and gas field wastewater can be as high as 30,000 mg / l, which has caused serious interference and impact on the mercury removal and organic pollutant removal processes. Mercury removal, removal of organic pollutants and high chloride ions are intertwined, interfering, restricting and influencing each other, which greatly increases the difficulty of wastewater treatment. Therefore, the treatment of mercury-containing oil and gas field wast...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/28C02F1/52C08F8/36C08F8/32C08F8/28C08F20/56C02F101/16C02F101/20C02F101/30C02F103/10
CPCC02F1/28C02F1/46104C02F1/52C02F2101/163C02F2101/20C02F2101/30C02F2103/10C08F8/36C08F8/32C08F8/28C08F20/56
Inventor 王金霞李谢玲桑鹏程李治鹏蔡庆赵雪罗乐朱韵周皓
Owner CHONGQING VOCATIONAL INST OF ENG
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