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Resourceful treatment method and device for oil-containing sludge in oil fields by microwave pyrolysis

A treatment method and treatment device technology, applied in chemical instruments and methods, pyrolysis treatment of sludge, vaporization of by-products, etc., can solve problems such as excessive stacking sites, pollutants polluting the environment, etc., to solve environmental pollution and avoid danger The effects of waste discharge fees and broad market application prospects

Active Publication Date: 2010-09-22
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of curing / stabilization are large storage areas and potential recontamination of contaminants over time

Method used

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  • Resourceful treatment method and device for oil-containing sludge in oil fields by microwave pyrolysis
  • Resourceful treatment method and device for oil-containing sludge in oil fields by microwave pyrolysis
  • Resourceful treatment method and device for oil-containing sludge in oil fields by microwave pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the storage yard of the oilfield joint station, the dried sludge with a moisture content of 8.0%, and the oil content of the dried sludge is 22.9%:

[0034] 1. The dried sludge is heated and reacted (ie, pyrolyzed) at 550°C for 4 hours, the oil content of the residue is 0.29%, and the oil recovery rate is 65.9%;

[0035] 2. The best activation conditions for nitric acid are: nitric acid concentration 45%, activation time 4h, mass parts liquid-solid ratio 4.5:1. The adsorption performance of the residue to phenol was measured, and its saturated adsorption capacity was 60.12mg / g.

Embodiment 2

[0037] In the storage yard of the oilfield joint station, the semi-dried sludge with a water content of 54.6%, and the oil content of the semi-dried sludge is 12.3%:

[0038] 1. The dried sludge is heated and reacted (ie pyrolysis) at 600℃ for 4 hours, the oil content of the residue is 0.21%, and the oil recovery rate is 60.9%;

[0039] 2. The optimal alkali activation conditions are as follows: activation temperature is 150°C, activation time is 3h, NaOH concentration is 30%, and mass ratio of alkali to solid is 2:1. The adsorption performance of the residue to phenol was measured, and its saturated adsorption capacity was 47.04mg / g.

Embodiment 3

[0041] The bottom sludge of the settling tank of the oilfield joint station has a water content of 65% and an oil content of 10.8%:

[0042] 1. The dried sludge is heated and reacted (ie pyrolysis) at 600℃ for 4 hours, the oil content of the residue is 0.25%, and the oil recovery rate is 64.3%;

[0043] 2. The best activation conditions for nitric acid are: nitric acid concentration 45%, activation time 4h, mass parts liquid-solid ratio 4.5:1. The adsorption performance of the residue to phenol was measured, and its saturated adsorption capacity was 51.96mg / g.

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Abstract

The invention discloses a resourceful treatment method and a resourceful treatment device for oil-containing sludge in oil fields by microwave pyrolysis. The oil-containing sludge is conveyed into an enclosed reactor heated by microwaves, and is subjected to pyrolysis treatment at the temperature of between 200 and 900 DEG C; oil, gas and water generated by the pyrolysis treatment are recycled; the residue after the pyrolysis is used as a roadbed material or modified by nitric acid or NaOH alkali; and the modified residue is used as an adsorbing material. After the method and the device are implemented, over 75 percent of crude oil in the oil-containing sludge can be recycled, the pollution fee of 1,000 yuan / t can be saved, the social and economic benefits are obvious, and the method and the device have wide market application prospect.

Description

1. Technical Field [0001] The invention relates to a microwave pyrolysis resource treatment method and device for oily sludge in an oil field. The method is suitable for the reduction, resource utilization and harmless treatment of oily sludge and other wastes produced by oil field refining and chemical production and sewage treatment systems . 2. Background technology [0002] With the continuous development of domestic oilfields, the amount of produced sewage has increased sharply, and the amount of sludge produced from it has also increased sharply. The total amount has reached more than 1 million tons per year. The sludge output of Shengli Oilfield alone has reached 120,000 tons per year. Around 20 years ago, these sludges not only contain oil, but also contain various oil additives. The existence of these components causes poor cleaning and biodegradation processes. It takes hundreds of years to completely decompose under natural conditions, which not only directly occupy la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10B01J20/00
CPCY02W10/40
Inventor 侯影飞张建祝威桂召龙王利君尚明华王玉江孙建成李毅董健王田丽
Owner CHINA PETROCHEMICAL CORP
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