Oily sludge treatment method

A treatment method and technology for oily sludge, applied in sludge treatment, water/sludge/sewage treatment, treatment of hydrocarbon oil, etc., can solve the problems of poor degradability of oily sludge, complicated process, and compatibilization of solidified products, etc. Achieve high catalytic activity and catalytic effect, lower reaction temperature, and reduce energy consumption requirements

Active Publication Date: 2021-05-18
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] my country's sludge treatment and disposal technology and technical level cannot meet the needs of harmless resource utilization of oily sludge, and there are deficiencies in investment, treatment effect and operating cost.
The solidification treatment method cannot effectively control the erosion and leaching of the organic matter and harmful ions in the oily sludge to the soil, and the volume of the solidified matter increases seriously; the solvent extraction method has a long treatment process, a relatively complicated process, and high cost; the landfill method is low in cost, but Buried will occupy a large amount of land resources, and it is easy to cause secondary pollution; the advantage of incineration is high efficiency and relatively thorough, but the high water content of oil sludge makes it impossible to incinerate directly, and a large amount of fuel oil needs to be added for auxiliary combustion, which consumes a lot of energy and will generate A large amount of waste gas and fly ash containing toxic and harmful organic substances; the cost of biological treatment is low, but the degradability of oily sludge is poor, the treatment cycle is long, the degradation is not complete, and it is greatly affected by climatic conditions
[0004] In summary, from the multi-dimensional perspective of reduction, harmlessness, and resource utilization, the existing technical methods for treating oily sludge are either high in cost, difficult to operate, serious in secondary pollution, or low in resource utilization.

Method used

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Effect test

Embodiment 1

[0054] This implementation case designs the treatment effect of a method for treating oily sludge with titanium dioxide catalyzed hydrothermal reaction, which specifically includes the following steps:

[0055] The device for treating oily sludge by catalytic hydrothermal reaction with titanium dioxide catalyst is a hydrothermal reaction kettle. Stir the oily sludge evenly, and after there is no obvious water deposition, take 500g of oily sludge, and mix the commercialized nano-titanium dioxide with the stirred oily sludge according to the mass ratio of 1.5: 100 mixing, the temperature rise parameters of the reactor were set at a heating rate of 3°C / min, a stirring rate of 100r / min, a maximum reaction temperature of 230°C, and a reaction residence time of 30min. After the reaction was over, the reactor was closed and the temperature was naturally lowered to 100°C. About 300g of the mixture was taken and centrifuged at high temperature in a centrifuge with the centrifugation pa...

Embodiment 2

[0059] This implementation case designs the treatment effect of a method for treating oily sludge with titanium dioxide catalyzed hydrothermal reaction, which specifically includes the following steps:

[0060] The design of the titania catalyst to catalyze the hydrothermal reaction treatment of oily sludge is the same as in Example 1. The difference is that the mass ratio of titanium dioxide catalyst to oily sludge is 1:100.

[0061] The results of the treatment of oily sludge by the hydrothermal reaction catalyzed by the titanium dioxide catalyst are shown in Table 1: the dehydration efficiency of the oily sludge is 36.92%, the oil removal efficiency of the oily sludge is 42.81%, and the resource extraction efficiency of the oil is 46.71%.

Embodiment 3

[0063] This implementation case designs the treatment effect of a method for treating oily sludge with titanium dioxide catalyzed hydrothermal reaction, which specifically includes the following steps:

[0064] The design of the titania catalyst to catalyze the hydrothermal reaction treatment of oily sludge is the same as in Example 1. The difference is that the mass ratio of titanium dioxide catalyst to oily sludge is 2:100.

[0065] The results of the treatment of oily sludge by the hydrothermal reaction catalyzed by the titanium dioxide catalyst are shown in Table 1: the dehydration efficiency of the oily sludge is 36.14%, the oil removal efficiency of the oily sludge is 57.75%, and the resource extraction efficiency of the oil is 57.80%.

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Abstract

The invention provides an oily sludge treatment method. The method comprises the following steps: by taking titanium dioxide as a catalyst, carrying out catalytic treatment on oily sludge through catalytic hydrothermal reaction. In the treatment method provided by the invention, based on a titanium dioxide catalytic hydrothermal reaction, the structure of an oily sludge aggregate can be destroyed to promote the lightening of heavy petroleum hydrocarbon, so that the release of water and oil in the oily sludge is promoted, and the dehydration efficiency, the oil removal efficiency and the resource extraction and utilization efficiency of the oily sludge are further improved; the treatment method has the advantages of being simple and easy to implement, low in cost, free of secondary environmental pollution, high in recycling degree and the like; and the treatment method provided by the invention is suitable for treating various oily sludge generated in petrochemical engineering, can realize reduction, harmlessness and resourceful treatment and utilization of the oily sludge, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and mainly relates to a treatment method for oily sludge. Background technique [0002] The oily sludge waste produced by the petrochemical industry has complex components. In addition to containing a large amount of petroleum substances, it also contains many refractory organic substances with "three effects", which bring great harm to human health and the ecological environment. Recycling and reduction of oily sludge is costly and difficult to operate, which is an international problem in the field of harmless treatment of hazardous waste. It is estimated that the land sludge and tank bottom sludge produced in my country each year account for about 2% of the total crude oil output, which is close to 4.3 million tons. The total amount of oil trap bottom sludge, flotation tank bottom sludge, flotation tank scum and remaining activated sludge in the petrochemical refining process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F11/143C10G47/04C10G47/32
CPCC02F11/10C02F11/143C10G47/04C10G47/32C10G2300/1003C02F2209/02C02F2303/06
Inventor 籍国东党正柱
Owner PEKING UNIV
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