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Method and device for pretreating thickened oil refining sewage

A technology for refining and chemical sewage and pretreatment, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc.

Active Publication Date: 2013-10-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the current status of heavy oil refinery sewage treatment in refineries, the main purpose of the present invention is to provide an improved process for pretreatment of heavy oil refinery sewage, so that the high-concentration refractory oil-containing oil produced in the process of heavy oil refinery After pretreatment, the sewage can meet the water intake requirements of the biochemical process of the general refinery sewage field, and solve the impact on the downstream sewage field caused by the change of the properties of the heavy oil raw material

Method used

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  • Method and device for pretreating thickened oil refining sewage
  • Method and device for pretreating thickened oil refining sewage
  • Method and device for pretreating thickened oil refining sewage

Examples

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Embodiment 1

[0043] Embodiment 1 (super) heavy oil sewage pretreatment technological process

[0044] seefigure 1 , the device for the pretreatment of heavy oil refinery sewage of the present invention comprises a homogeneous settling tank 10, a demulsification and oil removal tank 20, a coagulation settling tank 30, a primary ozone oxidation device 40 and a secondary ozone catalytic oxidation device 50 arranged in sequence , the homogeneous settling tank 10, the demulsification and oil removal tank 20, the coagulation settling tank 30, the primary ozone oxidation device 40 and the secondary ozone catalytic oxidation device 50 are sequentially connected through sewage pipelines. In addition, the heavy oil refinery sewage pretreatment device is also provided with a waste oil tank 60 for collecting floating oil from the homogeneous settling tank 10 , the demulsification tank 20 and the coagulation settling tank 30 . A buffer tank 304 is provided between the coagulation settling tank 30 and t...

Embodiment 2

[0052] Embodiment 2 Ozone high-pressure catalytic oxidation device

[0053] The structures of the first-stage ozone oxidation device 40 and the second-stage ozone catalytic oxidation device 50 used in the device process of Example 1 are basically the same, except that the secondary ozone catalytic oxidation device is filled with a catalyst. Specifically, the structure of the primary ozone oxidation device and the secondary ozone catalytic oxidation device is as follows figure 2 , image 3 Described.

[0054] Such as figure 2 , image 3 As shown, the ozone (catalytic) oxidation device 100 (first-stage ozone oxidation device 40, secondary ozone catalytic oxidation device 50) includes an ozone generation system 1 connected in sequence by pipelines, an ozone dissolved gas water generation system 2, an ozone (catalysis) Oxidation system 3 and oxidation reaction separation system 4; Ozone generation system 1 is connected with ozone dissolved air water generation system 2 entra...

Embodiment 3

[0060] The preparation of embodiment 3 ozone heterogeneous catalysts

[0061] Weigh the coarse porous silica gel (the average pore diameter of the coarse porous silica gel is 8.0~10.0nm, the specific surface area is 300~400m 2 / g, pore volume 0.8 ~ 1.0ml / g;) 18 grams was dried at 110°C for 10 hours, added 5% hydrogen peroxide solution, soaked for 14 hours, taken out, dried in the shade, and set aside; soak the above-mentioned coarse-pored silica gel in equal volume Stay in the mixed solution of 6 grams of manganese nitrate and 4 grams of ferric nitrate, keep for 20 hours, dry at 110°C for 10 hours, and then calcined at 500°C for 5 hours to obtain a catalyst for catalytic oxidation treatment of sewage.

[0062] Figure 4 , Figure 5 and Figure 6 They are respectively the nitrogen adsorption and desorption curve, the pore size distribution curve and the transmission electron microscope diagram of the ozone heterogeneous catalyst prepared in Example 3.

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Abstract

The invention provides a method and a device for pretreating thickened oil refining sewage. The method comprises the steps of homogeneous sedimentation, emulsion breaking oil removal and sulphur removal, coagulating sedimentation sulphur removal, primary ozonation and secondary catalytic ozonation, for pretreating high-oil-content and severely-polluted sewage generated in a thickened oil refining process. In the steps of the homogeneous sedimentation, the emulsion breaking oil removal and sulphur removal, and the coagulating sedimentation sulphur removal, a thickened oil resource is recovered to the greatest extent mainly by physical and chemical means, and pollutants such as mud residues and SS (suspended solids) in non-dissolved states are removed; then a water sample is further subjected to the primary ozonation and the secondary catalytic ozonation; the acute catalytic ozonation of water is reduced; and the biodegradability is improved. The pretreated sewage meets a water inlet requirement of a biochemical treatment technology in a general oil refining sewage plant; and multiple functions such as recovering the oil resource, and eliminating foul gas pollution can be achieved in the process of pretreating the thickened oil refining sewage.

Description

technical field [0001] The invention relates to a technology for pretreatment of low-quality heavy oil refinery sewage, in particular to a method and device for pretreatment of heavy oil refinery sewage, belonging to the technical field of oil refinery sewage treatment. Background technique [0002] Heavy oil usually refers to a viscosity greater than 1×10 2 MPa·s or relative density greater than 0.934g / cm 3 heavy bituminous crude oil with a viscosity greater than 5×10 4 The heavy oil of MPa s is called super heavy oil. In addition to the common characteristics of heavy oil such as low API, high viscosity, high density, high carbon residue, and rich non-hydrocarbon compounds, heavy oil also has high sulfur nitrogen, high salt content, high metal, high acid value, and high impurities. Features. [0003] With the accelerated development of the world economy, conventional oil reserves are decreasing day by day, and the world's crude oil supply tends to be heavy and inferior...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04
Inventor 陈春茂阎光绪王庆宏陈红硕郝海飞郭绍辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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