SU1525246A1 - Device for purifying contaminated water in reservoir - Google Patents

Abstract

The invention relates to the field of environmental protection. The purpose of the invention is to increase work efficiency by creating a turbid curtain evenly distributed throughout the area and depth of the reservoir area being cleaned. The device comprising a dredger d 9 with a floating slurry pipeline 11 is additionally equipped with a floating obstacle 2, as well as a hydraulic dump 6 of sandy and clayey soils. From hydraulic dump 6, suspended clay particles are transported to barrier 2 with a float pipe and a perforated ballast-reagent pipe that ensure uniform distribution of suspended clay particles in the enclosed area of the reservoir. Finely dispersed clay minerals sorb toxic substances, bacteria, viruses, and petroleum products on their surface and precipitate them to the bottom of the reservoir. Contaminated sediments are recovered and stored in the mine. Sandy soil is used to create an erosion-resistant surface of the bottom of a reservoir and the surface of a quarry filled with clayey soil. 1 hp f-ly, 2 ill.

Description

The invention relates to the field of engineering ecology and can be used to restore the water quality of a natural reservoir by means of hydromechanization, mainly when its stagnant zone is contaminated.

The purpose of the invention is to improve work efficiencies by creating a turbid curtain evenly distributed over the area and depth of the area being cleaned.

FIG. 1 shows the planned location of the individual elements of the structure and hardware; Fig. 2 is a cross section LL of Fig. 1 of a floating barrier and a coastal quarry.

The device includes a pit 1 for mining clay soils that do not contain toxic contaminating soil ingredients. Floating barrier 2 is made of flexible and high-strength filtering material that prevents the spread of suspended solids outside the enclosed area of the reservoir. The structure of the floating barrier 2 includes flexible and elastic pipelines 3 and 4, which are sheathed and interconnected by a high-strength filtering material. The pipeline 3 is filled with air and serves to ensure the buoyancy of the barrier 2. The perforated pipeline 4 is ballast-reagent and serves to hydrotransport and distribute the reactant solution and the ground slurry over the area and depth of the enclosed section of the reservoir. The release of such a slurry is carried out in a dispersed manner from an orifice located at an equal distance from each other along the entire length of the ballast-reagent pipeline 4. The base of the floating obstacle 2 and its edge on the coast are fixed by anchors 5.

From pit 1, the development of the soil entering the hydraulic dump 6, and storage in the spent space of sedimented sediment from the bottom of the enclosed part of the reservoir.

Hydraulic dump 6 serves to create a reserve of clay and sandy soil resulting from its fractionation on an alluvium map. The clayey soil deposited in the settling pond 7 of the hydraulic dump 6 is used

to create a slurry-forming stream of turbid veil, and a sandy layer that is deposited on the same dumped wastewater reservoir, to reclaim the bottom of the enclosed part of the reservoir and the surface of pit 1 after the completion of work.

The settling pond 7 is the accumulator of the clay fractions of the quarry soil, and also provides with water a soil collecting device of the mobile suction dredger 8.

The dredger 9 with a soil collecting device 10 is used to develop pit 1 and form a hydraulic mine dump 6 from sandy and clayey soil, as well as to feed soil deposited on the bottom from the enclosed water area of the reservoir to pit 1. The ground transport system hydrotransport soil from pit 1 to hydraulic dump 6, hydrotransport of clay and sandy soil from hydraulic dump 6 to the fenced part of the water area, as well as hydrotransport of the precipitated suspension from the bottom of the fenced part of the water area to the pit 1. I

Mobile dredger 8 is designed to develop and supply clay soil from hydraulic dump 6 to perforated pipeline 4 of floating obstacle 2 while restoring water quality of natural reservoir and sandy soil of hydraulic dump 6 when reclaiming the bottom of the enclosed part of the reservoir, as well as recultivating the surface of pit 1.

The reagent tank with dispenser 12 provides the flow and regulation of the dose of the reagent entering the slurry pipeline with a suspension-forming flow, which significantly speeds up the process of sedimentation of the suspension to the bottom of the enclosed area of the reservoir.

The operation of the device is carried out as follows.

Initially, the dredger house 9, with the intake device 10, develops pit 1 and erects a hydraulic mine dump 6 from sandy and clayey soil. For this purpose, a hydraulic dump is built up with a pond-settler 7 in it. In the pond-settler 7 of the dump 6, a mobile landfill 8 is installed for subsequent soil collection of clay soil and feeding it to the contaminated part of the reservoir. At the same time

with

But With this, on the polluted part of the natural reservoir, a floating barrier 2 is installed, which is unwound in the water area from a reel-drum installed at the water's edge, using watercrafts.

Then the ballast-reagent perforated pipelines A of the floating obstacle 2 are connected through the socket connections to the slurry pipeline II of the mobile suction pump 8, installed

on the hydraulic dump 6, and with a reagent tank with dispenser 12.

The restoration of the water quality of the backwater zone of a natural water body is carried out by supplying a slurry of clay soils with a reagent solution through ballast-reagent perforated pipelines 4 T to the enclosed area of the water body. Highly dispersed clay minerals, inlet - n (not in suspension, have a highly developed surface and high adsorption properties. This ensures sorption on their surface of various toxic substances, bacteria, viruses, oil products and subsequent co-precipitation to the bottom of the reservoir.

The formed layer of clayey polluted sediments of the bottom of the enclosed area of the reservoir is extracted with the help of dredger 9 and stored in a quarry 1

At the end of the work, the reclamation of the surface of the reservoir, pit 1 and the hydraulic mine dump 6 is completed. To do this, a layer of sandy soil from the hydraulic mine dump is washed onto the bottom surface of the reservoir of the work site, as well as on the surface of the quarry. sediments, for example, under wave action, and also provides reliable insulation of contaminated. soil in quarry 1 from the effects of erosion processes.

At the end of the production of hydro-mechanized works in the water area of the reservoir, the floating obstacle 2 is released from the anchors 5 and is wound onto a spool-drum using watercrafts.

The floating barrier prevents contamination of the water area adjacent to the site and at the same time

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slid by hydrotransport system for supplying and uniform distribution of sorbents over the area and depth of the enclosed area of the reservoir.

The construction of a hydraulic mine dump with separation and storage of sandy and clay soils ensures their effective use for the intended purpose, namely to form a suspension-forming stream (from clay soil), which provides absorption of suspended pollutants on the particles and creating (from sandy soils) erosion. sustainable surface of the bottom of the reservoir and the surface of the pit, filled with soil.

The proposed device provides an effective restoration of the quality of water pollution in the stagnant zone of a natural water body and its bottom sediments, creates the conditions for the environmentally clean production of hydromechanized works and provides for the reclamation of the natural biocenosis of the water body and its coast.

Claims (2)

1. A device for the purification of polluted pond water, including a dredger, a slurry pipeline, a quarry for the development of clay-free, non-toxic soiling ingredients of soils, characterized in that, in order to increase work efficiency by creating an evenly distributed surface and depth turbid curtain area of the reservoir, it is provided with barriers uniformly installed within the area of the reservoir to be cleaned, and a hydraulic dump, each barrier is provided with floats located in its upper part m member and the perforated pipes, which are arranged discretely on the barrier height, the conduits of the barrier, the hydraulic dump pit and are interconnected by means of pipeline. 2. The device according to claim 1, characterized in that the obstacle pipelines are made with one-sided and two-sided perforation. J s FIG. I