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A method for graded upgrading and comprehensive resource utilization of oily sludge

A technology of recycling and oily sludge, which is applied in chemical instruments and methods, sludge treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult to eliminate oily sludge, high treatment cost, and high cost of extractant. Achieve the effect of realizing large-scale continuous industrial production, large processing capacity and high recovery rate

Active Publication Date: 2022-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Solvent extraction method refers to the use of chemical solvents to extract and recover the oil in the sludge. The advantage is that oil, water and mud can be effectively separated, and the extraction agent is stable and recyclable. The disadvantages are: long process, complicated process, and difficult extraction The cost of the agent is high, and the treatment is not complete
[0007] The incineration method means that the pretreated oily sludge is sent to the incinerator for incineration, which has a good effect of volume reduction and poison reduction, but has the disadvantages of secondary waste gas pollution, the need to add combustion-supporting fuel, the oil in the sludge cannot be recovered, and the ash after incineration needs to be recovered. further processing
[0008] Biological treatment uses microorganisms to degrade petroleum hydrocarbons in oily sludge into harmless products, but the biological treatment cycle is too long, the treatment cost is too high, and the selection of microorganisms is difficult and easy to be poisoned.
[0009] The profile control reinjection method is to use the oily sludge in the produced water to have good compatibility with the formation, so that the oil component is dispersed into an emulsion, which is injected into the downhole of the oil field to be profiled, or used as a water plugging material. However, this method is not only difficult Elimination of oily sludge
[0010] The oily sludge solidification method solidifies the oily sludge sand into blocks. The process of this method is simple and easy, but this method cannot recover oil products, and there is a large environmental risk

Method used

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  • A method for graded upgrading and comprehensive resource utilization of oily sludge

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take an appropriate amount of oily sludge and dewater it through a centrifugal separator;

[0037] (2) Put 5 grams of the dehydrated solid into a magnetic boat, place it in a pyrolysis furnace and roast at 300°C for 2 hours, and collect the oil. (3) Add 0.01g CuO to the remaining solid in step (2), add 10mL of 6wt% H 2 o 2 Aqueous solution, stirred at 60°C for 60 minutes and mixed uniformly to obtain a solid-liquid mixture.

[0038] (4) The solid obtained by filtering the mixture is biochar-like as a soil conditioner;

[0039] (5) The solid obtained by evaporation and drying is organic fertilizer solid.

[0040] (6) The oil fraction obtained in step (2) is recovered to the oil refining process, and the tail gas enters the coking unit;

[0041] (7) Condensate the water obtained in step (5) and proceed to step (3)

[0042] This embodiment deals with an appropriate amount of oily sludge to obtain organic fertilizer solids (yield rate 21.3%), biochar-like (yield ra...

Embodiment 2

[0045] (1) Take an appropriate amount of oily sludge and dewater it through a centrifugal separator;

[0046] (2) Put 50 g of the dehydrated solid into a magnetic boat, place it in a pyrolysis furnace at 300° C. for 2 h, and collect the oil.

[0047] (3) Add 0.1g CuO to the remaining solid in step (2), add 100mL of 6wt% H 2 o 2 Aqueous solution, stirred at 60°C for 60 minutes and mixed uniformly to obtain a solid-liquid mixture.

[0048] (4) The solid obtained by filtering the mixture is biochar-like as a soil conditioner;

[0049] (5) The solid obtained by evaporation and drying is an organic fertilizer solid, and the tail gas enters the coking device;

[0050] (6) reclaiming the oil obtained in step (2) to the refining process;

[0051] (7) Condensate the water obtained in step (5) and proceed to step (3)

[0052] This embodiment treats a proper amount of oily sludge to obtain organic fertilizer solids (yield rate 22.3%), biochar-like (yield rate 70.1%), recyclable oil ...

Embodiment 3

[0055] (1) Take an appropriate amount of oily sludge and dewater it through a centrifugal separator;

[0056] (2) Put 250 g of the dehydrated solid into a magnetic boat, place it in a pyrolysis furnace for 2 h at 300° C., and collect the oil.

[0057] (3) Add 1g CuO to the remaining solid in step (2), add 500mL of 6wt% H 2 o 2 Aqueous solution, stirred at 60°C for 60 minutes and mixed uniformly to obtain a solid-liquid mixture.

[0058] (4) The solid obtained by filtering the mixture is biochar-like as a soil conditioner;

[0059] (5) The solid obtained by evaporation and drying is an organic fertilizer solid, and the tail gas enters the coking unit;

[0060] (6) reclaiming the oil obtained in step (2) to the refining process;

[0061] (7) Condensate the water obtained in step (5) and proceed to step (3)

[0062] This embodiment treats an appropriate amount of oily sludge to obtain organic fertilizer solids (yield rate 26.3%), biochar-like (yield rate 69.1%), recyclable oil...

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Abstract

The invention discloses a method for graded upgrading and comprehensive resource utilization of oily sludge; it comprises the following steps: (1) dehydrating the oily sludge; The light component oil in the solid recovered by the refining unit is returned to the refining process, and the tar-containing gas is discharged and used for the coking process after being condensed; (3) Add catalyst, activator, oxidant (hydrogen peroxide) and water, stirring and reacting at 60-90°C for 0.5-8 hours; (4) centrifuging or filtering the solid-liquid mixture obtained in step (3), drying the solid to obtain a biochar-like solid; (5) adding to step (4) ) to obtain organic fertilizer solids containing humic acid, which are recycled to the original catalytic oxidation process after water condensation; this method is simple in process, low in cost, quick in effect, large in processing capacity, and thoroughly purified, and can realize complete purification of oily sludge resource utilization.

Description

technical field [0001] The invention relates to the technical field of resource utilization of oily sludge, in particular to a method for graded upgrading and resource utilization of oily sludge. Background technique [0002] Oily sludge is produced during oil development, collection, transportation, and oil refining. The oil content in the sludge is 10% to 50%, and the water content is 40% to 90%. [0003] The composition of oily sludge is very complex, that is, it contains a large amount of oil components such as aged crude oil, residual oil, wax, asphaltene, etc., and has the characteristics of high oil content and heavy oil components, and has great potential for oil and gas recovery and utilization. [0004] However, because it contains benzene series, phenols, anthracene, pyrene and other toxic "three-caused" substances with odor, a small amount of heavy metal salts such as copper, zinc, chromium and mercury, coagulants, corrosion inhibitors, scale inhibitors, Water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/127C02F11/00C10G1/00C05G3/80C09K17/40
CPCC02F11/127C02F11/00C10G1/002C05G3/80C09K17/40C02F2303/06C10G2300/1003
Inventor 林璋周含峰宿新泰刘学明刘天宝万娟娟
Owner SOUTH CHINA UNIV OF TECH