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Treatment method of high-sulfur content waste water of oil and gas field

A treatment method and high-sulfur technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, combustion methods, etc., can solve the problems of large chemical consumption and waste residue, potential safety hazards, and low efficiency , to achieve the effects of strong environmental adaptability, reduced operating costs, and technical economy

Inactive Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among the three methods, the physical method is the simplest. Due to the chemical reaction, the chemical method consumes a lot of chemicals and waste residue when the sulfur content of the wastewater is high, so it is not suitable for treating wastewater with a high sulfur content; Oxidation and removal of sulfide, due to the limitation of microbial tolerance, the efficiency of treating wastewater with high sulfur content is low, so it is not suitable for treating wastewater with high sulfur content
The Chinese patent number is 200710010393.4, which is a treatment method for sulfur-containing wastewater. This patent uses air aeration to remove sulfide in the wastewater after acid adjustment. The principle is the same as that of stripping, but hydrogen sulfide is a flammable and hazardous chemical. Mixing with air can form an explosive mixture, which can cause combustion and explosion when exposed to open flames and high heat, posing serious safety hazards

Method used

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  • Treatment method of high-sulfur content waste water of oil and gas field

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Experimental program
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Effect test

Embodiment 1

[0031] The main water quality characteristics of the treatment of high-sulfur wastewater from oil and gas fields in this embodiment are: sulfide 2000 mg / L, total dissolved solids 10000 mg / L, and suspended solids 500 mg / L.

[0032] The treatment method of the high-sulfur wastewater from oil and gas fields in this embodiment is as follows: firstly, the pH of the high-sulfur wastewater is adjusted to 6 with sulfuric acid; secondly, the pH-adjusted wastewater is input into a negative pressure desulfurization unit for desulfurization treatment, The operating conditions of negative pressure desulfurization are: inlet water temperature 35°C, operating negative pressure -0.04MPa, hydraulic retention time 20min, reflux ratio of circulating pump 5:1; finally, the hydrogen sulfide produced after negative pressure desulfurization is collected and incinerated deal with.

[0033] The effluent sulfur content of the high-sulfur wastewater from oil and gas fields treated by the above method is...

Embodiment 2

[0035] The main water quality characteristics of treating high-sulfur wastewater from oil and gas fields in this embodiment are: sulfide 5000 mg / L, total dissolved solids 20000 mg / L, and suspended solids 1500 mg / L.

[0036] The treatment method of the high-sulfur wastewater from oil and gas fields in this embodiment is as follows: first, the pH of the high-sulfur wastewater is adjusted to 4.5 by sulfuric acid; secondly, the pH-adjusted wastewater is input into a negative pressure desulfurization unit for desulfurization treatment, The operating conditions of negative pressure desulfurization are: inlet water temperature 40°C, operating negative pressure -0.05MPa, hydraulic retention time 25min, circulation pump reflux ratio 4:1; finally, the hydrogen sulfide produced after negative pressure desulfurization is collected and incinerated deal with.

[0037] The effluent sulfur content of the oil and gas field high-sulfur wastewater treated by the above method is ≤40mg / L. Therefore,...

Embodiment 3

[0039] The main water quality characteristics of treating high-sulfur wastewater from oil and gas fields in this embodiment are: sulfide 10000 mg / L, total dissolved solids 30000 mg / L, and suspended solids 3000 mg / L.

[0040] The treatment method of the high-sulfur wastewater from oil and gas fields in this embodiment is as follows: firstly, sulfuric acid is used to adjust the pH of the high-sulfur wastewater to 5; secondly, the pH-adjusted high-sulfur wastewater is input into a negative pressure desulfurization unit for desulfurization treatment, The operating conditions of negative pressure desulfurization are: inlet water temperature 45°C, operating negative pressure -0.06MPa, hydraulic retention time 30min, circulation pump reflux ratio 3:1; finally, hydrogen sulfide generated after negative pressure desulfurization is collected for incineration deal with.

[0041] The effluent sulfur content of the oil and gas field high-sulfur wastewater treated by the above method is ≤70...

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Abstract

The invention relates to the technical field of industrial waste water treatment and especially relates to a treatment method of high-sulfur content waste water of an oil and gas field. The method utilizes the characteristic of oil and gas field high-sulfur content waste water sulfide in a form of hydrogen sulfide under acidic conditions, utilizes a negative pressure desulphurization technology to separate hydrogen sulfide in the waste water and realizes removal of a sulfide in high-sulfur content waste water of an oil and gas field. The treatment method utilizes a negative pressure desulphurization technology to treat high-sulfur content waste water of an oil and gas field, effectively reduces sulfur content of waste water, solves the problem of high sulfur content in oil and gas field high-sulfur content waste water later treatment processes and utilizes a device which is simple, has a high automation degree, can be operated and maintained easily, has a good adaptive capacity to environment, has a small land occupation area and high desulphurization efficiency, realizes skid-mounted treatment and greatly reduces an operation cost.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a treatment method for high-sulfur wastewater from oil and gas fields. Background technique [0002] With the development of social economy and the continuous improvement of people's living standards, the demand for energy is increasing day by day, and the extraction volume of oil and gas fields is increasing year by year. In the development of oil and gas fields, especially in the middle and later stages of oil and gas field development, because formation water can invade gas reservoirs along faults and structural fractures, and enter the bottom of wells, the energy loss of gas reservoirs increases, wellhead pressure decreases, and water carrying capacity becomes poor. As a result, the production of gas wells has been reduced or water flooding has stopped production. In order to maintain the stable production of natural gas, the gas field vigorously promo...

Claims

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Application Information

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IPC IPC(8): C02F9/04F23G7/06
Inventor 张新妙彭海珠栾金义卢姝
Owner CHINA PETROLEUM & CHEM CORP
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