Method and device for treating oily sludge

A sludge generation device technology, which is applied in the field of resourceful and harmless oily sludge treatment, can solve the problem that the storage tank is not a scientific and effective treatment method, and the oily sludge cannot be effectively treated, and the atmosphere and surrounding soil are recycled again. Pollution and other problems, to achieve the effect of rapid electrochemical reaction, strong reproducibility, and short reaction time

Inactive Publication Date: 2011-04-06
朱同德 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, traditional methods cannot effectively treat oily sludge. At present, most oilfields and petrochemical enterprises mainly deal with oily sludge after simple dehydration, direct landfill, incineration, or building storage tanks for temporary storage.
A large amount of landfill or incineration of oily sludge not only wastes oil resources, but also causes re-pollution to the atmosphere and the surrounding soil; and the construction of storage tanks for temporary storage is not a scientific and effective treatment method, and the construction cost and area are also increasing. The rapid increase of the amount of sludge

Method used

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  • Method and device for treating oily sludge
  • Method and device for treating oily sludge

Examples

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Effect test

Embodiment 1

[0035] To treat oily sludge with a water content of 82% in a sewage station in an oil field, the electrochemical reactor uses figure 2Structure, voltage 60v, current 1000A, the residence time of oily sludge in the electrochemical reactor is 30 minutes, the outlet sampling measurement shows that the oil removal rate is 72%, the removal rate of organic pollutants and volatile solids is 84%, sulfate-reducing bacteria And the removal rate of saprophytic bacteria is 95%; the extracted water is sampled and measured after filtration, the COD is 153mg / L, the oil content is 17.6mg / L, the suspended solid SS is 34mg / L, the sulfate reducing bacteria and saprophytic bacteria are 0, reaching the reinjection water Standards and efflux secondary standards.

Embodiment 2

[0037] To treat oily sludge with a water content of 82% in a certain sewage station in an oil field, the electrochemical reactor adopts such image 3 Structure, voltage 60v, current 1000A, the catalyst added is mixed and sintered with shell carbon fiber, barium oxide and titanium oxide according to the mass ratio of 40:20:40. The residence time of oily sludge in the electrochemical reactor is 20 minutes, and the outlet sampling measurement shows that the oil removal rate is 90%, the removal rate of organic pollutants and volatile solids is 89%, and the removal rate of sulfate-reducing bacteria and saprophytic bacteria is 100%; The extracted water was sampled and measured after filtration. The COD was 126mg / L, the oil content was 14.9mg / L, the suspended matter SS was 35mg / L, and the sulfate-reducing bacteria and saprophytic bacteria were 0, meeting the reinjection water standard and the second-level discharge standard.

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Abstract

The invention relates to a method and a device for treating oily sludge. Under the action of an applied electric field and by adopting an electrochemical oxidation method, the oil-in-water and water-in-oil structure of emulsified oil is quickly broken, and the oily sludge serving as an electrolyte releases oil drops; oil is quickly taken by a large number of micro bubbles to the liquid level to be recycled under the action of applied air flotation; oily sludge flocs are subjected to electrochemical reaction on the surface to produce various active free radicals which have high activity and oxidability and mainly comprise hydroxyl, and organic pollutants are degraded to be converted into water and carbon dioxide; the active free radicals can destroy a microbial cell structure and kill sulfate reducing bacteria and saprophytic bacteria through a series of oxidation chain reactions; the sludge is powerfully dehydrated, so that the water quality of dehydrated water meets the water quality standard of oil field reinjection, and the sludge can be recycled; and a mud cake is nontoxic and harmless and can be used for soil improvement, fertilizers, building materials and the like.

Description

technical field [0001] The invention relates to a sludge treatment method, in particular to a recycling and harmless oily sludge treatment method Background technique [0002] Oily sludge is composed of sludge and sediment produced in the process of oil production sewage treatment, as well as flocs formed by various chemicals added in sewage purification treatment, corrosion products of equipment and pipelines, scale, bacteria (corpse), etc. Sludge generally has an oil content of 20-40% and a moisture content of 70-90%. my country's petrochemical industry produces an average of 800,000 tons of tank bottom sludge and pool bottom sludge every year. Oily sludge is generally a stable suspoemulsion system composed of oil-in-water (o / w), water-in-oil (w / o) and suspended solids. The dehydration effect is poor, and the sludge composition and physical properties are affected by sewage water quality, treatment process, Influenced by factors such as chemical addition, high oil content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/06
Inventor 朱同德朱华
Owner 朱同德
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