Oil-containing sludge pyrolysis and its resource treatment method

A technology of oily sludge and recycling, which is applied in the direction of pyrolysis treatment of sludge and vaporization of by-products, etc., can solve the problem of difficult wastewater separation, and achieve the effect of low one-time investment and high mechanical strength

Inactive Publication Date: 2013-01-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the deficiencies of the existing oily sludge treatment technology, the present invention provides a reasonable oily sludge treatment technology, so that the oily sludge can be completely recycled and harmless, and at the same time, a magnetic-rich material with a large pore volume and specific surface area can be prepared. Carbonaceous adsorbent, which solves the problem that activated carbon is difficult to separate from wastewater after it is pulverized in water

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  • Oil-containing sludge pyrolysis and its resource treatment method

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Effect test

Embodiment 1

[0042] The oil content of oily sludge in the sedimentation tank of an oil field is 30%, the water content is 15%, and the solid content is 55%.

[0043] Main operating conditions: oily sludge, coal gangue powder and Fe 3 O 4 The mass ratio is 1:0.2:0.06; the operating pressure of the granulator is 6.0MPa, and columnar granules with a diameter of 2mm and a length of 5mm are obtained. After the oily sludge particles are pre-dried, the moisture content is 2%; the pre-dried oily sludge particles enter the pyrolysis device, using nitrogen as the protective gas, gradually heating to 600 ℃, and keeping at this temperature for 40 minutes. The activation temperature of pyrolysis sludge is 500℃, and water vapor is used as the activation medium. The temperature of the high-temperature oil and gas discharged from the pre-dryer is 110°C, and the temperature of the oil and gas after being cooled by circulating water is 45°C. The oil and gas post-processing device is a condensing device, and th...

Embodiment 2

[0047] The oil content of the bottom mud of an oil tank is 50%, the water content is 5%, and the solid content is 45%.

[0048] Main operating conditions: oily sludge, coal gangue powder and Fe 3 O 4 The mass ratio is 1:0.5:0.06; KOH is added as activator at the same time, and the addition amount is 0.05%. The granulator has an operating pressure of 7.0 MPa to obtain columnar granules with a diameter of 2 mm and a length of 5 mm. After the oily sludge particles are pre-dried, the moisture content is 0.5%. The pre-dried oily sludge particles enter the pyrolysis unit, using nitrogen as the protective gas, gradually heating to 500°C, and keeping it at this temperature for 70 minutes. The temperature of the high-temperature oil and gas discharged from the pre-dryer is 100°C, and the temperature of the oil and gas after being cooled by circulating water is 45°C. The oil and gas post-processing device is a condensing device, and the condensation temperature of the oil and gas is -30°C...

Embodiment 3

[0052] The oil content of the bottom mud of an oil tank is 50%, the water content is 5%, and the solid content is 45%.

[0053] Main operating conditions: oily sludge, coal powder and Fe 3 O 4 The mass ratio is 1:0.3:0.06. The granulator has an operating pressure of 7.0 MPa to obtain columnar granules with a diameter of 2 mm and a length of 5 mm. After the oily sludge particles are pre-dried, the moisture content is 0.5%. The pre-dried oily sludge particles enter the pyrolysis unit, using nitrogen as the protective gas, gradually heating to 600°C, and keeping it at this temperature for 40 minutes. The activation temperature of pyrolysis sludge is 500℃, and water vapor is used as the activation medium. The temperature of the high-temperature oil and gas discharged from the pre-dryer is 110°C, and the temperature of the oil and gas after being cooled by circulating water is 50°C. The oil and gas post-processing device is a condensing device, and the condensation temperature of th...

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Abstract

The invention relates to an oil-containing sludge pyrolysis and its resource treatment method, and belongs to the field of environmental protection and energy saving technologies. The oil-containing sludge pyrolysis and its resource treatment method comprises the following steps of: adding a gangue powder and Fe3O4 into an oil-containing sludge; respectively carrying out mixing, granulation, preheated drying (using a pyrolysis gas as a heat source) and pyrolysis on the mixture; cooling the pyrolysis gas discharged out from a pre-drier by the use of circulating water such that steam and hydrocarbons in the pyrolysis gas are condensed respectively in the forms of oil-containing sewage and liquid hydrocarbon; allowing the oil-containing sewage to enter a sewage treatment plant so as to reach the standard, recovering and utilizing liquid hydrocarbon, and activating sludge to prepare a magnetic carbonaceous adsorbent. According to the invention, resource of the oil-containing sludge can be completely realized, and the carbonaceous adsorbent with large pore volume and specific surface area can be prepared. The invention is especially suitable for pyrolysis treatment of oil-containing sludge (such as oil tank bottom mud, oil-field oil extraction sludge, tank car or oil tanker bottom mud and the like) with high oil content.

Description

[0001] Technical field [0002] The invention provides a method for pyrolysis of oily sludge and its resource utilization, and belongs to the technical field of environmental protection and energy saving. [0003] Background technique [0004] The production of oily sludge runs through all aspects of oil extraction, oil refining, oil storage and transportation, and sewage treatment. The annual output of oily sludge in my country's oil extraction industry alone exceeds one million tons. Oily sludge contains a large amount of petroleum hydrocarbons. If it is not recycled, it will not only waste oil and gas resources, but also require a large area of ​​land for storage or landfill due to high water content and huge volume of sludge. Coal gangue is a solid waste discharged in the process of excavation, mining and coal washing. It is a mixture of carbonaceous, argillaceous and sandy shale. It has a low calorific value and contains 20% to 30% carbon. China has accumulated about 1,000Mt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10
CPCY02W10/40
Inventor 王明星张龙齐慧敏王海波刘忠生
Owner CHINA PETROLEUM & CHEM CORP
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