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A method for advanced treatment of natural gas recovery jelly liquor containing foaming agent

An advanced treatment, natural gas technology, applied in mining wastewater treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., which can solve the problems of difficult separation and removal, inability to remove the treatment cost of foaming and discharging agents, etc.

Active Publication Date: 2020-09-15
SICHUAN XINGAO ENVIRONMENTAL TECH SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Foaming agent (COD) is compounded by a variety of surfactants and functional additives. The composition is complex and diverse. The biggest feature of this kind of substance is that it contains both hydrophilic groups and hydrophobic groups, and has great solubility in water. It is difficult to effectively separate and remove from water using conventional treatment methods
Generally, this kind of water is treated by bubble membrane separation method, adsorption method, coagulation method, membrane separation method and catalytic oxidation method, but these methods cannot completely remove the foam discharge agent in the produced water or the treatment cost is high

Method used

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  • A method for advanced treatment of natural gas recovery jelly liquor containing foaming agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Adjust the pH value of the natural gas production water to 7, and install it in the flow type electroflocculation equipment with a surface area of ​​170mm 2 Aluminum plates with a spacing of 20mm, the connection mode of the electrodes is the double pole connection mode, and the cathode and anode plates are distributed in multiple groups in the electrolytic cell at intervals. Turn on the pump to pump the wastewater into the electrocoagulation equipment, start the pulse power supply, adjust the current intensity to 9A, then start the electrocoagulation reaction, set the reaction time to 10min; after the reaction is completed, the wastewater is left to settle for 20min, and then the plate and frame filter press After filtering, the obtained filtrate is subjected to multi-effect evaporation until the foaming agent content is 28,000-32,000 mg / L, so as to obtain the natural gas recovery water mother liquor.

[0024] Take 200ml of natural gas recovery jellyfish liquid after mu...

Embodiment 2

[0026] Adjust the pH value of natural gas produced water to 7, and install aluminum plates with a surface area of ​​170mm2 in the flow-type electroflocculation equipment, with a plate spacing of 20mm. In the electrolytic cell, there are multiple groups distributed at intervals. Turn on the pump to pump the wastewater into the electrocoagulation equipment, start the pulse power supply, adjust the current intensity to 9A, then start the electrocoagulation reaction, set the reaction time to 10min; after the reaction is completed, the wastewater is left to settle for 20min, and then the plate and frame filter press After filtering, the obtained filtrate is subjected to multi-effect evaporation until the foaming agent content is 28,000-32,000 mg / L, so as to obtain the natural gas recovery water mother liquor.

[0027] Take 200ml of natural gas extraction jellyfish liquor after multi-effect evaporation, add an appropriate amount of dilute hydrochloric acid to adjust the pH to 2, add...

Embodiment 3

[0029] Adjust the pH value of natural gas produced water to 7, and install aluminum plates with a surface area of ​​170mm2 in the flow-type electroflocculation equipment, with a plate spacing of 20mm. In the electrolytic cell, there are multiple groups distributed at intervals. Turn on the pump to pump the wastewater into the electrocoagulation equipment, start the pulse power supply, adjust the current intensity to 9A, then start the electrocoagulation reaction, set the reaction time to 10min; after the reaction is completed, the wastewater is left to settle for 20min, and then the plate and frame filter press After filtering, the obtained filtrate is subjected to multi-effect evaporation until the foaming agent content is 28,000-32,000 mg / L, so as to obtain the natural gas recovery water mother liquor.

[0030] Take 200ml of natural gas production jelly liquor after multi-effect evaporation, add appropriate amount of dilute hydrochloric acid to adjust the pH to 2, add 5.5ml ...

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Abstract

The treatment process of natural gas produced water of the present invention, be specifically related to a kind of advanced treatment method of natural gas produced water mother liquid containing foaming agent, comprise the following steps: a, the preparation of natural gas produced water mother liquid: remove the calcium magnesium ion in natural gas produced water , colloid and suspended matter, and then concentrated so that the foaming agent content is 28000-32000mg / L; b. Adjust the pH value of the natural gas production water mother liquor to make the pH value ≤ 3; c. The natural gas production water with a pH value ≤ 3 Add extractant to the mother liquor, extract the foaming agent, stand still and separate the liquid, and complete the advanced treatment of the natural gas recovery water mother liquor; the extractant is composed of trioctylamine and decane, or triethylamine and sulfonated A mixture of kerosene, or a mixture of triethylamine and kerosene. The treatment method can effectively remove the foaming agent in the mother liquor, so that it can meet the emission standard of environmental protection, and the cost is low, which reduces the environmental protection cost for the enterprise.

Description

technical field [0001] The invention relates to a treatment process for natural gas production water, in particular to an advanced treatment method for natural gas production jelly liquor containing a foam removal agent. Background technique [0002] In the low-density and low-permeability gas fields that have entered the middle and late stage of production, most wells produce water intermittently, and a small number of wells produce water continuously, and the water volume is relatively large. The daily water production of a single well can reach 5m 3 Left and right, there is a risk of water flooding in the reservoir, so drainage gas recovery technology is generally used for production at present, which makes the foaming agent widely used in production wells. [0003] In gas wells, with the gradual increase of water production and increasingly stringent environmental protection laws and regulations, the treatment of a large amount of produced water containing foaming agents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F103/10
CPCC02F1/001C02F1/04C02F1/26C02F1/463C02F1/66C02F9/00C02F2103/10
Inventor 张涛蒲毅智
Owner SICHUAN XINGAO ENVIRONMENTAL TECH SERVICE CO LTD
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