Method for processing oil sludge

A technology for sludge and treatment steps, applied in the field of sludge treatment, can solve problems such as secondary pollution and incomplete treatment, and achieve the effects of reducing unit energy consumption, reducing load, and reducing operating costs

Inactive Publication Date: 2014-04-23
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these technologies have the problem of incomplete treatment or secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0017] The concrete embodiment of the present invention will be described by taking the oily sludge from an oilfield as an example. The selected oil sludge is thick oil sludge, dark brown in color, no obvious crude oil accumulation condensate, crude oil and soil adhere closely. After sampling, pick out the larger stones, branches and domestic garbage in the sample, then mix the sample evenly, and place it in a sealed place. Oil sludge contains 74.32% oil, 14.60% water, and the rest is solid matter.

[0018] The screw feed pump is used to push the viscous oil sludge into the homogeneous reactor filled with water and heated to a certain temperature at a certain flow rate by using the screw propulsion function. At the same time, the chemical will also enter the homogeneous reactor together with the oil sludge. . The reaction conditions are as follows: heating temperature 80°C, stirring time 60 minutes, solid-liquid ratio 1:4, medicament concentration 0.5% (w / w). Turn on the ag...

specific Embodiment 2

[0020] Take the oil sludge from another oilfield as an example to illustrate the specific embodiment of the present invention. Oil sludge contains 81.30% oil, 14.25% water, and the rest is solid matter.

[0021] Process flow is with embodiment 1. The reaction conditions in the homogeneous reactor are: heating temperature 70°C, stirring time 90min, solid-liquid ratio 1:6, medicament concentration 0.8% (w / w). After the combined process of heating chemical washing-aeration degreasing-centrifugal separation, the oil content in the sand is 4.5%, the sand content in the oil is 1.3%, and the water content in the oil is 4.8%.

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Abstract

The invention relates to a method for processing oil sludge, and is suitable for processing ground crude oil in oil field, and a whole technology does not impacted by the loading. According to the existence state of oil, sand and water in oil-containing sludge, by the steps of heating, adding drug, homogenizing, aerating, depositing and centrifuging at high speed, the existence distribution state of oil, sand and water can be changed, the sand-in-oil phenomenon in the original oil sludge is gradually changed to sand-in-water, and the inclusion viscosity of the crude oil to sediment is reduced. Through settlement, oil sludge can be separated before entering into a centrifuge, the loading of the high speed centrifuge is reduced, processing amount of a device is increased, and the unit energy consumption is reduced. The separated sediment surface as well as the internal oil content are reduced to the lowest limitation. The unit treatment process parameter can be freely adjusted according to the oil-containing sludge processing requirement, the method has certain adaption capability; the process is simple and smooth, the operation and management are convenient, recovered crude oil and processed sediment can reach the standard in a stable manner, and a system employs the combination of automatic mode and manual operation.

Description

technical field [0001] The invention relates to a treatment method for oily sludge, which is a method for treating oily sludge with heating chemical washing-aeration degreasing-centrifugal separation. Background technique [0002] Oily sludge is an oily solid waste produced during oil extraction, transportation, refining, and oily sewage treatment. It has the characteristics of high water content, large volume, complex composition, difficult treatment, most of the harmful components exceed the discharge standard, and high calorific value. [0003] Oily sludge is huge. If it is discharged directly without treatment, it will not only occupy a large amount of cultivated land, but also produce a large amount of foul gas, polluting the surrounding soil, water, and air. After the petroleum substances in the sludge penetrate into the soil, they will stick to the soil particles. The surface affects the permeability of the soil, hinders the effective soil water-conducting pathway, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00
Inventor 李会鹏赵华
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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