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Oil and gas field high-sulfur-content waste water processing method

A waste water treatment, high sulfur content technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of incomplete chemical oxidation treatment, increased cost, Eliminate fuel consumption and other issues, and achieve the effect of eliminating hydrogen sulfide and sulfide pollution, reducing hazards and safety hazards, and reducing environmental pressure

Inactive Publication Date: 2013-03-27
SICHUAN RENZHI PETROCHEMICAL TECHNOLOGY CO LTD
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Problems solved by technology

Although the washing and absorption method has high purification efficiency, it has large power consumption, high investment and operating costs, harsh control conditions, and is prone to secondary pollution. The adsorption method has the characteristics of simple process and high purification efficiency, but the adsorbent is expensive. Moreover, there are many technical problems in the regeneration process; the combustion method consumes fuel, which increases the cost; the chemical oxidation method is incomplete and other shortcomings

Method used

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  • Oil and gas field high-sulfur-content waste water processing method

Examples

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example 1

[0017] Example 1: Add the waste water into the closed reaction tank, and treat the waste water per cubic meter according to the following formula: lime: 5kg, ferrous sulfate: 1kg, and pump the hydrogen sulfide gas escaped from the closed reaction tank into the biological desulfurization reaction device. Treatment: adding polyaluminum chloride: 4.5kg, the treated water is filtered through a plate and frame filter press for mud-water separation, the separated filtrate enters subsequent wastewater treatment, and the separated sludge cake is solidified on site.

[0018] The water quality indicators for treatment after mud-water separation are attached figure 1 shown.

[0019] The subsequent wastewater treatment method for the water after mud-water separation is as follows: the separated filtrate enters the oxidation tank for oxidation reaction. After 12 hours of reaction, the water quality after the reaction is tested, and if the treatment reaches the standard, it is discharged,...

example 2

[0020] Example 2: Add the waste water into the closed reaction tank, and treat the dosage of waste water per cubic meter according to the following formula: sodium hydroxide: 4kg, ferrous sulfate: 3kg, pump the hydrogen sulfide gas escaped from the closed reaction tank to the biological desulfurization reaction Treatment is carried out in the device; polyaluminum chloride: 4kg is added, and the treated water is filtered through a plate-and-frame filter press for mud-water separation, and the separated filtrate enters subsequent wastewater treatment, and the separated sludge cake is solidified on site.

[0021] The water quality indicators for treatment after mud-water separation are attached figure 2 shown.

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Abstract

The invention relates to a processing method of oil and gas field high-sulfur-content waste water in fields of oil and gas exploration, mining, and transportation. The method comprises the steps that: a, waste water is added into a sealed reaction tank; a pH regulating agent and a desulfurization agent are added into the tank; b, hydrogen sulfide gas escaped in the sealed reaction rank is pumped into a biological desulfurization reaction device and is processed; c, a flocculating agent is added into the waste water after reaction, and a coagulation treatment is carried out; and d, after the coagulation treatment, sludge-water separation is carried out; separated filtrate is delivered into subsequent waste water processing process; and separated sludge cake is subjected to in-situ curing. With the method provided by the invention, hydrogen sulfide and sulfide pollutions are eliminated; hydrogen sulfide harm and safety risk during oil and gas mining and transportation process are reduced; environmental pressure is reduced; sulfide-removing treatment is thorough; and cost is low.

Description

technical field [0001] The invention relates to a treatment method for high-sulfur waste water in oil and gas fields in oil and natural gas exploration, production and transportation. Background technique [0002] In recent years, the development and exploration of oil and gas has been continuously intensified, especially in the Yuanba Block, which will gradually enter the stage of development, production and transportation during the "Twelfth Five-Year Plan" period. In most high-sulfur gas fields in the Yuanba block, during the testing and production and transportation process, high-concentration hydrogen sulfide and sulfide are produced on the ground along with formation water and natural gas. After gas-liquid separation, part of hydrogen sulfide and sulfide are separated, but some hydrogen sulfide and sulfide still enter the wastewater treatment unit. The concentration of hydrogen sulfide and sulfide in these wastewaters is relatively high, and the concentration of hydro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/52
Inventor 卜文海姚兵汪廷洪王晗王官均周婷续书成霍志梁
Owner SICHUAN RENZHI PETROCHEMICAL TECHNOLOGY CO LTD
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