SU987024A1 - Arrangement for cleaning water streams from floating debris - Google Patents

Description

The invention relates to hydraulic structures designed to clean and maintain open watercourses in proper condition.

A device is known for cleaning water from petroleum products by collecting them by ejecting water and transporting it to a settling tank 1.

A disadvantage of this device is the use of such complex and expensive elements as pumps and floating tanks for collecting petroleum products.

It is also known a device for cleaning watercourses from floating pollution, including a guide element, a barrier with a weir and a collection container connected to it mounted at the turn of the watercourse 2.

However, the known device is characterized by insufficient efficiency of collecting oil from the stream due to unregulated spillway and the additional purification required in this case, collected in the collecting tank of oil from the water entering it.

The purpose of the invention is to increase work efficiency by creating and circulating water from above to the collection tank and from below to the watercourse.

The goal is achieved by the fact that the barrier is made with a through hole and is provided with a spur located outside the barrier

 I 3.. adjacent to it and installed perpendicular to the flow of the stream, the barrier is equipped with a guide drain tray placed in the upper part and communicating through the hole with

10 team capacity.

In addition, the direction of the drain tray is L-shaped with a width less than the height and installed with the possibility of vertical movement.

15

FIG. 1 shows the device, top view; FIG. 2 is a cross-section along the drain pan; in fig. E-barrage, cross section.

Claims (2)

The device includes an assembly capacitance 1, which is separated from the water course by a barrier 2, for example, the tongue-and-groove row. A through hole 3 is made in the barrier 2, it is possible to make two holes, one A located 25 in the upper part of the collecting tank, and the second B in the lower part of the collecting tank 1 and downstream. A drain tray 4 is connected to the opening 3, which is made with the possibility of vertical movement. In front of the lower part of the opening 3, a perpendicular to the flow outside the barrier 2, a spur 5 is attached to it closely, the width of which is 1/3 of the width of width 3. The drain tray 4 is at an acute angle to the flowing stream and rests on the second end of the rack 6, having guide brackets 7. The drain tray 4 has an L-shaped form, the horizontal shelf 8 of which is directed downstream and blunt, and the top of the vertical shelf 9 extends above the surface of the water, and the depth of the recessed shelf 8 is not less than the height of the submerged often and a vertical shelf 9. A shield 11 and an end wall 10 can be attached to the drain chute. At the turn of the channel, the surface transverse velocities are directed from the convex bank to the concave, resulting in floating contaminants concentrating at the exit of the turn of the stream near the concave bank. The device works as follows. The upper part of the flow, flowing to the drain tray 4, creates a velocity head, under the action of which part of the water with floating contaminants enters the collection tank 1, where the surface contaminants, for example, not phthe products accumulate, and the water in the bottom Part of the collecting vessel 1 is discharged into the main stream through the part of the through hole 3 located below the shield 11, which is downstream under the influence of the negative pressure that occurs when the main stream flows around the spur 5. Experimental and theoretical studies of leakage and flow past a plate located perpendicular to the direction of flow of a stream have shown that the deviation of elementary streams of flow due to the presence of a plate in the flow path appears only at the plate height equal to the plate. Therefore, to eliminate the possibility of leakage of the upper layer of flow under tray 4, the depth of the recessed shelf 8 is not less than the height of the submerged part of the vertical wall 9. The width of the through hole 3, equal to three times the width of the spur 5, ensures reliable suction of water from. tank capacity 1 for almost all lowland rivers. The magnitude of the velocity head at the barrier 2, located at an angle of 90 ° - c6 to the direction of flow, can be considered equal (figure 1). ..one. h. H -2 –C05d, where V is the average flow velocity g is the acceleration of gravity; Y is the coefficient of resistance of the tray to the flow. In a collection tank, the level of the liquid is greater than the water mark in the main flow. The pressure in the collecting tank 1 and the flow is balanced with this factor, provided that it is n - b) Ge + (c + h), (2) where H is the depth of the considered point from the surface of the main flow; tol1in contamination in the collection tank below the level of the main stream; C is the specific gravity of water; the proportion of floating pollution. From (2) we have Te - and Substituting the value of h from we get TM; -J Yf Te-n The thickness of the soil layer in the collecting tank can reach the value of hj under the action of the velocity head of the run-in. Provided that the polluter is oil products having Tn 0 , 75 t / m, H 1 and coecfc 0.80 from (4), taking into account (1), we find when; 1 m / s. 0.80 + 2-9.81 1.0-0.75 +. -ii5, 0.80 0.16 m. 2-9.81 Negative pressure occurs behind the spur 5, to balance which, under the same conditions, the same thickness of oil in the collecting vessel is required. Thus, it is possible to accumulate oil products in a collecting tank with a layer of up to 0.3 m without the cost of energy supplied from outside. The location of the device at the exit from the turn at the concave bank allows cleaning the entire surface of the passing stream, without completely blocking its entire cross section, which makes it possible at the same time to freely use the watercourse for other purposes, such as transport, timber rafting. The use of the invention makes it possible to purify a watercourse from floating contaminants, for example, petroleum products, in a relatively simple manner at no additional cost to electricity, without large operating and other costs. Apparatus of the invention 1. A device for cleaning watercourses from floating contaminations, including a cell element, an obstacle with a spillway and a collection tank connected to it installed at the turn of the watercourse, characterized in that, in order to increase work efficiency by creating water circulation from above . the collecting tank / a from below into the watercourse, the barrier is made with a through hole and replaced by a spur located outside the barrier close to it and installed perpendicular to the flow, the barrier is provided with a drain guide placed in the upper part and together through the hole with the collection tank. 2. The device according to claim 1, which is different from the fact that Nagravl nady drain tray has L formula with a width not less than the height and is installed with the possibility of vertical movement. Sources of information taken into account during the examination 1. USSR author's certificate 665052, cl. E 02 B 15 / 04,1979. 2. Authors. Certificate of the USSR 874861, cl. E 02 15/04, 1980.