Method for processing sulfur-containing waste water

A treatment method and waste water technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of large chemical consumption and waste residue, poor environmental adaptability of gas wells, and improve desulfurization Operating costs and other issues, to achieve the effect of strong environmental adaptability, easy operation and maintenance, and small footprint

Inactive Publication Date: 2016-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

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
In view of the limited site conditions, natural gas is mainly used for stripping at present, so a large amount of natural gas is consumed, which greatly increases the operating cost of desulfurization by this method
In addition, this method requires large equipment, complicated installation, maintenance and operation, poor adaptability to the environment of gas wells, and low processing efficiency

Method used

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  • Method for processing sulfur-containing waste water
  • Method for processing sulfur-containing waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The main water quality characteristics of the sulfur-containing wastewater treated in this example are: sulfide 2000 mg / L, total dissolved solids 5000 mg / L, and suspended solids 0 mg / L.

[0037] The treatment method of the sulfur-containing wastewater of the present invention is as follows: first, the pH value of the sulfur-containing wastewater is adjusted to 6 by using sulfuric acid; The operating conditions of negative pressure desulfurization are as follows: the inlet water temperature is 35°C, the inlet water flow rate is 0.6m / s, and the operating negative pressure on the negative pressure side is -0.04MPa; the membrane material used in the membrane negative pressure desulfurization unit is polypropylene, and the membrane The pore size is 0.1 μm. Finally, the hydrogen sulfide generated after membrane negative pressure desulfurization is collected for incineration.

[0038] The sulfur-containing wastewater treated by the above method has a sulfur content of ≤30mg / L...

Embodiment 2

[0040] The main water quality characteristics of the sulfur-containing wastewater treated in this embodiment are: sulfide 5000 mg / L, total dissolved solids 15000 mg / L, and suspended solids 50 mg / L.

[0041] The treatment method of the sulfur-containing wastewater of the present invention is as follows: first, the pH value of the sulfur-containing wastewater is adjusted to 4.5 by using hydrochloric acid; The operating conditions of negative pressure desulfurization are as follows: the inlet water temperature is 40°C, the inlet water flow rate is 0.8m / s, and the operating negative pressure on the negative pressure side is -0.05MPa; the membrane material used in the membrane negative pressure desulfurization unit is polypropylene, and the membrane The pore size is 0.2 μm. Finally, the hydrogen sulfide generated after membrane negative pressure desulfurization is collected for incineration.

[0042] The sulfur-containing wastewater treated by the above method has a sulfur content o...

Embodiment 3

[0044] The main water quality characteristics of the sulfur-containing wastewater treated in this embodiment are: sulfide 10000 mg / L, total dissolved solids 30000 mg / L, and suspended solids 100 mg / L.

[0045] The treatment method of the sulfur-containing wastewater of the present invention is as follows: first, the sulfur-containing wastewater is input into a sand filter for primary filtration; secondly, the pH value of the sulfur-containing wastewater is adjusted to 5 by using nitric acid; Sulfur wastewater is input to the negative pressure desulfurization unit of membrane method for desulfurization treatment. The operating conditions of negative pressure desulfurization by membrane method are as follows: the inlet water temperature is 45°C, the inlet water flow rate is 0.9m / s, and the negative pressure on the negative pressure side is -0.06MPa; The material of the membrane used in the negative pressure desulfurization unit of the method is polytetrafluoroethylene, and the por...

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Abstract

The invention relates to the field of industrial waste water processing, and especially relates to a method for processing sulfur-containing waste water. The method comprises the following steps: 1) adjusting the pH value of the sulfur-containing waste water to 4-6 by employing a pH conditioning agent; and 2) inputting the sulfur-containing waste water after pH regulation into a membrane method negative pressure desulfurization unit for desulphurization processing. The method by employing the membrane method negative pressure desulfurization technology for processing sulfur-containing waste water has the advantages of simple equipment, high automation degree, easy operation maintenance, strong environmental adaptability, less land occupation, and high desulphurization efficiency, can realize the skid-mounted processing, and greatly reduces the operation cost.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment method for sulfur-containing wastewater. Background technique [0002] With the rapid development of the national economy, various industries produce a wide variety of wastewater, including coking wastewater, tannery wastewater, and high-sulfur wastewater from oil and gas fields. High-sulfur wastewater has caused enormous pressure on the natural environment, especially the high-sulfur wastewater generated during the mining of high-sulfur oil and gas fields in Southwest Mining Area, which contains a large amount of sulfide. If it is not treated effectively, it will not only cause serious pollution to the environment, but also cause serious corrosion to the water pipeline, posing a serious safety hazard. [0003] At present, the treatment methods of sulfur-containing wastewater mainly include physical, chemical and biological methods. Among them, the phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 张新妙杨永强彭海珠许树华
Owner CHINA PETROLEUM & CHEM CORP
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