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Oily sludge recycling and reduction treatment method and system

A treatment method and technology of a treatment system, which are applied in the field of oily sludge recycling and reduction treatment methods and treatment systems, can solve the problem of wasting heat energy of petroleum resources, high oil content and water content of oily sludge, limited treatment capacity, etc. problem, to achieve the effect of resource utilization and reduction, low mud water content, and high oil recovery efficiency

Inactive Publication Date: 2019-12-24
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the principle of similar compatibility, the organic solvent extraction method uses organic solvents to extract organic matter, which can recover most of the oil in petroleum sludge. big security risk
The indirect thermal desorption method uses high-temperature gas to indirectly heat the oily sludge, which has low heat transfer efficiency and limited processing capacity, which cannot meet the large processing capacity demand of the current oil sludge treatment market.
The direct thermal desorption method has fast heating speed, high utilization rate of heat energy, and large processing capacity, but the oil content and water content of the oily sludge are relatively high. If the direct thermal desorption method is directly used to treat the oily sludge, it will cause waste of petroleum resources and heat loss

Method used

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example 1

[0044] Taking the oily sludge from an oil field as the treatment object, its water content is 34%, oil content is 55%, and the soil particle size is less than 12mm. After the oily sludge is crushed, fluidized, screened and impurity removed according to the method of the present invention, chemical heat washing is carried out. The heat washing agent is a composition of sodium silicate and NP-10, and the dosage is 1% and 0.5% of the weight of the oil sludge respectively. %, the recovery rate of crude oil after cleaning is 92%, and the deoiled mud is dehydrated by a solid-liquid separator and a paddle dryer, and the moisture content of the sludge is reduced to 24%.

example 2

[0046] Taking the oily sludge at the bottom of an oilfield as the treatment object, its water content is 30%, oil content is 61%, and the soil particle size is less than 5mm. The oily sludge is subjected to chemical heat washing after crushing, fluidization, screening and impurity removal according to the method of the present invention. The heat washing agent is a composition of sodium silicate, sodium carbonate and cardanol polyoxyethylene ether, and the dosage is respectively 0.5%, 0.5% and 0.5% of the mass, the recovery rate of crude oil after cleaning is 89%, and the deoiled mud is dehydrated by a solid-liquid separator and a paddle dryer, and the moisture content of the sludge is reduced to 26%.

example 3

[0048] Taking the refining oily sludge of a petroleum refining enterprise as the treatment object, its moisture content is 89%, oil content is 10%, and the soil particle size is less than 5mm. The oily sludge is subjected to chemical heat washing after crushing, fluidization, screening and impurity removal according to the method of the present invention. The heat washing agent is a composition of sodium silicate and SP169, and the dosage is 1% and 0.5% of the weight of the oil sludge respectively. , The recovery rate of crude oil after cleaning is 92%, and the deoiled mud is dehydrated by a solid-liquid separator and a paddle dryer, and the moisture content of the sludge is reduced to 25%.

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Abstract

The invention discloses an oily sludge recycling and reduction treatment method and system. The treatment method comprises the steps of crushing, fluidization, screening and impurity removal, chemicalhot washing, solid-liquid separation, drying, deep treatment and the like. The treatment system mainly comprises an oily sludge storage tank, a feeding device, an impurity removal system, an oil recovery system and a dehydration system which are connected in sequence, wherein oily sludge in the oily sludge storage tank is conveyed to the impurity removal system through the feeding device to be subjected to crushing, fluidization and screening treatment, then the oil sludge treated by the impurity removal system is conveyed to the oil recovery system to collect crude oil, and isolated slag slurry is conveyed to the dehydration system to be subjected to solid-liquid separation, drying treatment and harmless deep treatment. By adopting the method and the treatment system provided by the invention, more than 80% of mineral oil in the oily sludge can be recycled, and meanwhile, the moisture content in the sludge is reduced to 30% or below, so that recycling and reduction of the oily sludgeare realized.

Description

technical field [0001] The invention relates to the technical field of oily sludge treatment, in particular to a treatment method and system for recycling and reducing oily sludge. Background technique [0002] From the beginning of the 20th century to the present, oil has become one of the most important energy sources of human beings after large-scale exploitation. In the process of oil extraction, transportation, refining and use, a large amount of landing sludge, refining sludge and tank bottom sludge are produced. According to statistics, the oil sludge left over from history in my country exceeds 143 million tons at present, and is increasing at a rate of 4 million tons per year. These sludges are bulky and contain not only a large amount of petroleum resources, but also benzene, phenols, dioxins, quinones, pyrene, etc. If they are not properly treated, they will not only pollute the environment, but also cause waste of resources. [0003] At present, oily sludge is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/14C02F11/147C02F11/127C02F11/13C10G1/00C10G1/04
CPCC02F11/00C02F11/14C02F11/147C02F11/127C02F11/13C10G1/002C10G1/047C02F2303/06
Inventor 周永信朱红祥宋海农杨崎峰覃当麟谢湉廖长君赵志勇杨孟查兰华曾筱幸韦军卢颖
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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