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Oil-containing sludge treatment method

A treatment method and technology for oily sludge, applied in sludge treatment, water/sludge/sewage treatment, natural water treatment, etc., can solve problems such as environmental and human health hazards, impact on the surrounding environment, resource waste, etc., to reduce The effect of footprint, volume reduction, and processing cost reduction

Inactive Publication Date: 2017-06-30
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improper treatment of oily sludge will cause waste of resources and seriously affect the surrounding environment, causing harm to the environment and human health

Method used

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Experimental program
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Embodiment 1

[0042] This embodiment provides a treatment method for oily sludge, as figure 1 As shown in the process flow, oxidant and demulsifier are added to the sludge for the first high-temperature and high-pressure reaction, and then solid-liquid separation is carried out. The separated bottom sludge is repeatedly subjected to high-temperature and high-pressure reactions until a solid residue is obtained. The supernatant liquid obtained from liquid separation is used for crude oil recovery, and then undergoes biochemical reaction to obtain reclaimed water, which can be recycled. Specifically, it includes the following steps:

[0043] (1) The oily sludge used in this example was collected from CNPC Huabei Petrochemical. According to the standard GBT260-2011, the water content of the oily sludge is measured, and the water content of the measured result is 80%. With reference to the method of using organic solvent extraction when measuring the oil content of oily sewage in SYT0530-2011...

Embodiment 2

[0049] Only carry out 1 hydrothermal reaction under the same conditions as in Example 1, that is, carry out 1 hydrothermal reaction to oily sludge under the conditions of high temperature and high pressure in the presence of oxidants and demulsifiers. After the end, record the solid according to the method of Example 1 The water content of part (bottom mud) is higher than 80%, the oil content is higher than 10%, and the total volume reduction of oil sludge is lower than 60%.

Embodiment 3

[0051] Carry out hydrothermal reaction by the same condition of embodiment 1, only do not add demulsifier, promptly carry out multiple hydrothermal reactions to oily sludge under the condition of high temperature and high pressure, only exist oxidant, then after finishing, according to the method of embodiment 1 It is measured that the water content of the solid part (bottom mud) is higher than 75%, the oil content is higher than 8%, and the total volume reduction of the oil sludge is lower than 80%.

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Abstract

The present invention provides an oil-containing sludge treatment method, which comprises: mixing an oxidizing agent and oil-containing sludge in a closed container, and carrying out a hydrothermal reaction, wherein the reaction temperature is maintained at 250-270 DEGC, and the reaction pressure is controlled at 8-15 MPa. According to the present invention, the oil-containing sludge treated by the method of the invention has the substantially-reduced oil content and has the volume reduced in the multiplied manner, such that the recovery and utilization of the partial crude oil is achieved, the principles of the resource and the reduction of hazardous waste treatment are met, and the reclaimed water after the biochemical treatment can be reused so as to substantially reduce the oil-containing sludge treatment cost.

Description

technical field [0001] The invention relates to a treatment method for oily sludge, which belongs to the technical field of hazardous waste treatment. Background technique [0002] Oily sludge is the main pollutant produced in the process of petroleum development, transportation, processing and production. If it is not handled properly, it will cause serious pollution to the surrounding environment. In China, the output of oily sludge accounts for about 2% of the total output of crude oil, which is very huge. The composition of oily sludge is very complex, containing a large amount of toxic and harmful substances and due to the different sources of oily sludge, the content of each component in oily sludge varies significantly. [0003] Oily sludge was included in the "Hazardous Waste List" in 1998, and in accordance with the requirements of the "Management Measures for Collection Standards of Sewage Discharge Fees", a sewage discharge fee of 1,000 yuan per ton is required t...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/06C02F103/36
CPCC02F11/00C02F11/06C02F2103/365C02F2209/02C02F2209/03C02F2301/046C02F2301/066C02F2301/08C02F2303/06
Inventor 闫秀懿赵雅楠杨帅王宝峰邓若男周菁辉赵建国
Owner CHINA UNIV OF PETROLEUM (BEIJING)