SU1724806A1 - Device for protection of water pool from oil spill during pipeline breakout - Google Patents

Abstract

The invention relates to environmental protection. The purpose of the invention is to increase the efficiency of the device in case of emergency oil spills from the pipeline along an inclined coastal surface to the reservoir. On the ground above the pipeline 3 there are rollers 1 made of geotextile material 2 and filled with local soil normally at each point to the potential flow of oil pollution from the damaged pipeline 3 to the open water body. The rollers are located on the ground in several rows. The rollers 2 are filled with water permeable and practically impermeable soil for oil. Before the rollers can be arranged duur 5 of impermeable synthetic material or clay. 2 hp f-ly, 1 ill. yo

Description

The invention relates to hydraulic engineering, in particular, to devices for protecting open water bodies from oil pollution caused by damage to oil pipelines.

The purpose of the invention is to increase the efficiency of the device in case of emergency oil spills from the pipeline along an inclined coastal surface to the reservoir.

The drawing shows the proposed device, the overall appearance.

Dirt rollers 1 are shown in geotextile casing 2, oil pipeline 3, spilled with oil 4, don 5, backfill soil 6, impermeable lids in the form of segment 7, reservoir 8, depression curves 9 and 10, water 11.

The device is constructed as follows.

The soil rollers 1 of the local soil enclosed in the geotextile casing 2 are formed at the place of laying manually or with the help of special equipment. The place of laying, in particular the distance from the pipeline 3 to the ground rollers 1, is selected depending on the slope of the area, capacity and topography of the pipeline 3 and the height of the rollers 1. This distance should ensure that the roller retains the entire volume of oil spilled in the open reservoir 4. It is determined by a simple mathematical calculation for the most unfavorable from the point of view of the potential oil flow, the location of the damage on the pipeline. If the height of the rollers 1 by calculation is not enough for

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localizing the entire potential runoff of oil contamination, the rollers are placed on the ground in several rows (not shown). If the surface layer of the soil surrounding the pipeline has a high permeability, then a dull 5 of flexible impermeable synthetic cloth or clay is arranged in front of the rollers in order to increase the oil pollution filtration path and, accordingly, reduce its consumption. Due to the fact that the backfill soil of the pipeline 6 has a greater permeability than the soil outside the trench, oil filtering when the waterproof cover in the form of segment 7 overflows and the collecting reservoir 8 occurs predominantly upward regardless of the position of the groundwater level (depression curves 9 and 10). The position of the depression curve and, accordingly, the level of the water horizon in the open reservoir 11 during the year changes from a minimum value to a maximum value and vice versa. The geotextile sheath 2 of the ground rollers 1 prevents them from being eroded by surface waters, and it also reduces the required amount of soil at the same height of the fence due to the greater steepness of the roller slopes reinforced by it. The height of the rollers is insignificant; therefore, they do not significantly affect the hydrological regime of the terrain, therefore, they do not violate the ecological environment in the area of the oil pipeline during trouble-free operation.

In addition, the semi-permeability of the rollers prevents the accumulation in front of them of surface water (rainfall) and, consequently, the flooding of the area in the immediate vicinity of the pipeline. Semipermeability is provided by the fact that, with a head up to 1 m and a roller thickness (width) of at least 0.5 m for fine sands, they are water permeable and practically impermeable to oil. This is due to the fact that oil viscosity is 10-50 times higher than water viscosity. In addition, oil is a multicomponent substance, the presence of paraffins in it leads to clogging of the pores of the soil rollers, which also eliminates filtration. If the local soil is coarse sand, then semi-permeability is provided by the addition of special substances to the soil, for example, granulated rubber. Water passes through a mixture of coarse sand with rubber granules.

unimpeded, and the oil dissolves the rubber to a glue-like mass, which envelops the sand granules, removes pores, the rollers become impermeable to neither water nor oil. In this case, after

the elimination of the accident rollers must be re-laid. The installation of rollers allows to significantly reduce damage from an accident, localizing oil pollution on the ground, preventing it from getting into

open reservoirs.

Claims (3)

Claim 1, A device for protecting a reservoir from oil pollution due to oil leakage from oil pipelines, including impermeable covers installed above the oil pipeline laid in the ground and a collecting collector located under the pipeline, in order to increase the efficiency of the device in case of emergency spills of petroleum products from the oil pipeline on an inclined coastal surface to the reservoir, it is equipped with rollers from the prisoner to the geotextile shell of the soil, permeable to water and not permeable to oil, while the rollers are installed on the surface between the pipeline and the reservoir and are located normally in terms of the slope line coastal surface. 2. The device according to claim 1, wherein the rollers are arranged in several rows. 3. A device according to claim 1, characterized in that the primer of the rollers is provided with granules of a water-insoluble substance having oleophilic properties.