RU2182049C2 - Oil-contaminated soil recultivation method - Google Patents

Abstract

FIELD: petroleum industry. SUBSTANCE: method involves collecting spilt oil and simultaneously carrying out mechanical cleaning of contaminated soil area by simultaneously mellowing, providing bacterial treatment and applying mineral fertilizers into soil by means of vehicles equipped with oil-collecting device arranged in front part thereof and connected with container for temporary storage of collected oil, and with device for mellowing oil-contaminated soil. Method is suitable for removing oil contaminants from soil on oil-refining territories, for reclaiming of soils disturbed due to failure or damage of oil pipelines. EFFECT: reduced labor and time consumption for recultivation works, increased efficiency in restoring natural view of environment and improved ecology of territories with oil extraction sites. 1 dwg

Description

 The invention relates to methods for eliminating oil pollution in the developed fields, restoring disturbed lands as a result of an oil spill in case of damage and pipeline failures.

 A well-known technology for the rehabilitation of oil-contaminated soils, including the localization of the area of contamination, the collection of spilled oil from trenches and excavations, the treatment of oil-contaminated soil with bacterial preparations and the application of peat to the contaminated area ("The technological regulations for the restoration of oil-contaminated soils in the fields of Western Siberia." Tyumen, SibNIINP, 1993 p. 7-12).

 However, the named method has a significant drawback. This method of reclamation consists of a series of sequentially performed types of work that are carried out in a certain order. Each subsequent type of work is performed only after the work of the previous type is completed. As a result, a lot of time is spent on restoring the land plot disturbed as a result of economic activity. In other words, the implementation of this method is characterized by a duration in time and stretches over a significant period.

 The closest analogue to the present invention is a method of restoring a contaminated land, including simultaneous work on the collection of oil and mechanical processing of the land (patent RU 2142533).

 However, this method has a significant drawback, which consists in the following.

 The processes of degradation of oil-contaminated lands with this method take place slowly, since the climatic conditions are favorable for the decomposition of oil. In view of the fact that the Middle Ob region is characterized by late and short spring, short summer and early and short autumn, it becomes clear that the process of oil degradation needs to be activated, otherwise the decomposition of oil in the earth will last for a long period, that is, for years. In other words, the process of soil self-cleaning must be initiated to accelerate its restoration. In addition, in the first place, light fractions of oil are decomposed, and heavy fractions remain in the soil and subsequently, the cost of restoration increases due to the need for additional measures to decompose heavy fractions.

 The purpose of the invention is to reduce the time and cost of restoring disturbed lands, the natural appearance of the landscape.

 This goal is achieved by the fact that the collection of spilled oil is carried out simultaneously with the mechanical treatment of contaminated land.

 The drawing shows a diagram of the implementation of the method of reclamation of oil-contaminated lands.

 The scheme consists of a vehicle 1 on a caterpillar track with a capacity of 2, in front of which an oil collecting device 3 is attached, and a device 4 for loosening the soil is attached behind.

 The method is implemented as follows.

 A vehicle 1 on a caterpillar track of a known design, for example a swamp vehicle, is equipped with a tank 2 for temporary storage of collected oil, a device 4 of a known design for loosening oil-contaminated soil. As the device 4 may be a ploughshare, cutter, etc. The set of vehicle 1 should include an oil collecting device 3 of known design, which is mounted in front of the vehicle 1 and connected to a container 2 for temporary storage of the collected oil.

 This arrangement of technical equipment is delivered to the contaminated land, which is then processed by the described arrangement. Vehicle 1 on a caterpillar track, moving along an oil-contaminated land, at the same time allows you to collect oil by device 3, store it in tank 2 and loosen the soil by device 4. When moving vehicle 1, the following types of work are performed simultaneously: collecting spilled oil, bacterial tillage and the application of mineral fertilizers. When loosening, everything is mixed, which contributes to a more uniform distribution of the active components for the decomposition of oil in the contaminated area.

 The usefulness of the invention consists in improving the environmental situation at the developed oil fields, reducing the time and cost of reclamation work. The invention can be used in other industries, where there is a need to restore disturbed lands as a result of economic activity.

Claims (1)

 The method of reclamation of oil-contaminated land, including the collection of spilled oil simultaneously with the mechanical treatment of the contaminated land, characterized in that the mechanical treatment is carried out by loosening the soil with its simultaneous bacterial treatment and the introduction of mineral fertilizers into the soil by means of a vehicle equipped with an oil collecting device located in front the vehicle and associated with the tank for temporary storage of the collected oil, and the device for loosened I oil-contaminated soil.