Treatment method for wastewater generated by processing high-acid crude oil

A high-acid crude oil and treatment method technology, applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Inability to effectively treat waste water and other issues

Active Publication Date: 2012-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the survey, based on the same reason as above, it is generally difficult for the COD of the effluent of the oily sewage treatment series to be lower than 100mg / L, while the COD of the effluent of the saline sewage treatment series is as high as 200mg / L or more, which cannot meet the requirements of oily sewage reuse and salty sewage. Expected purpose of wastewater compliance
[0004] As mentioned above, the existing wastewater treatment methods cannot effectively treat the wastewater produced by high-acid crude oil production units, and wastewater treatment has become one of the obstacles restricting the use of high-acid crude oil, especially in areas where water resources are scarce and wastewater discharge standards are strict. The main obstacle for enterprises to process high-acid crude oil

Method used

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  • Treatment method for wastewater generated by processing high-acid crude oil
  • Treatment method for wastewater generated by processing high-acid crude oil
  • Treatment method for wastewater generated by processing high-acid crude oil

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Experimental program
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Embodiment 1

[0029] The treatment method of the present invention is used to treat the electric desalination wastewater of a high-acid crude oil refining enterprise in China. The main pollutants in wastewater are COD 4800mg / L (chromium method, the same below), petroleum 600mg / L, total oil 1800mg / L, ammonia nitrogen 90mg / L, volatile phenol 50mg / L, sulfide 17.0mg / L, pH 8.5 .

[0030] Adopt oil separation-demulsification-dissolved air flotation-electrolytic catalytic oxidation-MBBR-filtration combination process of the present invention to carry out laboratory treatment test to above-mentioned waste water, waste water treatment scale is 200mL / h, the main experimental device composition of each treatment unit, The operating conditions and treatment effects are shown in Table 1. After being treated by the method of the present invention, the COD in the waste water can be reduced to below 60mg / L, petroleum is reduced to below 0.5mg / L, total oil is reduced to below 5mg / L, ammonia nitrogen is red...

Embodiment 2～3

[0039] Using the treatment device of Example 1 to treat the same sewage as in Example 1, the wastewater treatment effects obtained by changing the operating conditions of each treatment unit are shown in Table 2 and Table 3, respectively.

[0040] Main processing unit constitution and processing effect of table 2 embodiment 2

[0041]

[0042]

[0043] Main processing unit composition and processing effect of table 3 embodiment 3

[0044]

[0045]

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Abstract

The invention relates to a treatment method for wastewater generated by processing high-acid crude oil, which adopts the combined processes of oil isolation, demulsification, dissolved air flotation, electrochemical catalytic oxidation, biological membrane moving bed reactor and filtering. The electro-desalting wastewater in the high-acid crude oil refining process is treated. When the method provided by the invention is adopted, the treatment process of other wastewater such as oil-containing wastewater, salt-containing wastewater and the like in the high-acid crude oil processing process can not be influenced by the high-acid crude oil wastewater, and the beneficial effects are brought for the stable operation of the oil isolation, the flotation, biochemistry and deep treatment units ofthe final sewage treatment field, so the problem that the wastewater generated by processing the high-acid crude oil at present can not reach the standard is solved, and the good basis is provided for the sewage reuse.

Description

technical field [0001] The invention relates to a treatment method for wastewater produced by processing high-acid crude oil, which is suitable for the treatment of wastewater discharged from an electric desalting device in the refining process of high-acid crude oil, and the treated effluent can meet the discharge standard. Background technique [0002] With the continuous development and utilization of crude oil, the output of heavy crude oil is increasing, and its density, viscosity, sulfur content, and acid value increase accordingly. According to preliminary statistics on the crude oil market in recent years, the global production of high-acid crude oil (acid value ≥ 0.5mg KOH / g) has accounted for 5.5% of the total development, and is increasing at an average annual rate of 0.3%. Due to the increasing shortage of crude oil resources and the obvious price advantage of high-acid crude oil, the centralized or large-scale processing of high-acid crude oil has become the dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36
Inventor 郭宏山许谦刘淑鹤朱卫
Owner CHINA PETROLEUM & CHEM CORP
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