SU929153A1 - Apparatus for draining industrial effluents from settlers - Google Patents

Description

(54) DEVICE FOR DISCHARGES

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This invention relates to a sewage treatment technique and may find application in industrial waste settling tanks containing suspended particles.

A device in a radial sump with the intake of the surface layer of the movable chute 1.

However, the use of such a device in an unstable and intermittent mode is inappropriate, because, firstly, it does not provide for a change in the water level in the sump and, secondly, it is designed for a permanent mode of operation, therefore for different times of water inlet and water drainage The clarification when the effluent is fed into the surface layer will be lower than in the case of peripheral water inlet into the lower layers of the settler, since at the same time of sludge in the latter case more sediment falls to the bottom.

It is also known a device made in the form of a radial settling tank with a lower inlet and a floating spillway chamber, in which, in order to ensure consistency of flow and composition of the waste liquid, the SINTERS

When entering for further purification, water is discharged through a floating overflow chamber located along the axis of the casing and connected to the drain pipe with flexible hoses 2.

 In a known installation, the floating spillway chamber does not provide for the collection and discharge of the most clarified surface layers of water, since water is simultaneously removed from the water flow into the chamber.

10 bottom of the sump with a high concentration of suspensions. When water is withdrawn from the buffer tank, the bottom layers will be captured with a decrease in the level and at the same time a part of the most clarified surface layers will remain in the sump. Besides

 Therefore, when currents appear at the bottom of the buffer tank, the possibility of sedimentation of the deposited sediment is not excluded, and therefore the concentration of suspended solids in water increases.

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Claims (1)

The purpose of the invention is to increase the efficiency of use of the installation by preventing the suspension from getting into the discharged water. This goal is achieved by the fact that, in a device for dumping industrial effluent from sumps, including a floating water intake in the form of a tray with a flexible hose connected to a water outlet, the tray is made with a sloping bottom, overflow windows and a catchment tank, equipped with a turning mechanism and located the sump radius. FIG. I shows the proposed device, a longitudinal section; in fig. 2 shows section A-A in FIG. 1. The device consists of a water intake tray 1 placed in the body of a sump 2 with a peripheral supply of waste water through nozzles 3 having overflow lengths on both sides of the spillway 4, designed to enter the clarified water outlet. The tray is connected to the floats 5 by straps 6. One of the ends of the tray has a catchment 7, which is connected with a flexible hose 8 to a lid 9, which has gland connections to the drainage pipe 10 and the central support 11. The collector capacity of the tray 12 is connected to the legs of the tray 12 , which are connected at the top with the rotation mechanism 14, and at the bottom with the drain cover. The device works as follows. The intake of the surface layer of water by the floating tray can be carried out simultaneously with the water inlet through the nozzles 3 of the peripheral distribution pipe (this clarifies the water compared to the water intake by the centrally located spillway chamber by increasing the volume of the reservoir core and the sump utilization rate) for some time 1.5-2 hours in a quiet state (in this case, an increase in the clarification efficiency is achieved by gradually removing m of the cleanest surface water layers. The surface water layer through the overflow window 4 (which can be submerged to prevent floating debris and oils from entering the drainage system) enters the water intake tray 1. The depth of the draft of the tray is adjusted by stretching 6. At the inclined bottom of the tray the water flows into the water collection tank 7 and through the flexible hose 8 enters the water drain pipe 10. The water intake tray is rotated around the central support 11 simultaneously with the drain pipe cover (to avoid twisting the Lang) using racks 13, which transmit rotation from the mechanism 14 of rotation. Rotation of the tray can be carried out in parallel with the scraper device at a speed of 0.8-1.5 rev / h (in this case, it is advisable to position the tray somewhat ahead of the scrapers, which would prevent the introduction of suspensions lifted with scrapers from the bottom of the settler into the tray) or water intake and removal Sludge can be produced at different times (with a periodic operation of the sump), which will allow for a quieter sludge and weir conditions. In the latter case, to ensure unimpeded rotation of the tray in the sump, the scraper device must provide for either raising the scrapers higher than the level in the tank to the inoperative position, or cleaning the racks connecting the scrapers to the swing farm, or other mechanism for turning the scrapers. The overflow into the tray should be done in such a way as to ensure uniform collection of the surface layer over the entire area of the sump. To do this, the drain through the windows of the water intake tray must increase from the axis of rotation to the end of the tray in direct proportion to the distance from the catchment basin. The efficiency of the use of the catchment tray (as compared to the installation of the overflow chamber) depends on the characteristics of the wastewater, the particle size distribution of the slurries, the parameters of the sump, the clarification mode and the limits of water level fluctuations in it. With simultaneous inlet and drainage for a sedimentation tank with a ratio of diameter to depth of 5: 1, by installing a water intake tray, the liquid movement flow decreases and the active volume of the settler increases by 2-2.5 times. According to the periodic water intake mode and the same parameters of the sedimentation tank, the water intake by the floating tray reduces the concentration of suspended matter in the drainage by 1.5 times (conventionally, the grain composition is uniform and unlimited size of particles). With an increase in the ratio of the diameter to the depth of the settling tank to 10-12: 1, the efficiency of using the water intake tray with periodic water outflow will increase. Apparatus of the Invention A device for discharging industrial effluent from sedimentation tanks, including a floating trap in the form of a tray with a flexible hose connected to a water outlet, located in the decanter housing, characterized in that, in order to increase the efficiency of use by preventing sediment from getting into the discharged water, the tray is inclined bottom, spillway windows and catchment capacity, equipped with a turning mechanism and is located along the radius of the sump.