SU1504219A1 - Waste water treatment apparatus - Google Patents

Abstract

The invention relates to the treatment of industrial wastewater, namely, devices for the treatment of wastewater from fatty substances, petroleum products and mechanical impurities. The purpose of the invention is to increase the degree of separation of fatty substances from wastewater, reducing energy and operating costs. The wastewater treatment device contains inlet and settling chambers, a thin-layer separation unit (TP), made in the form of inclined shelves, and divided by partitions into two parts, a sludge accumulation chamber, a grease collecting pocket, nozzles for supplying and discharging treated water, grease products and piping draft. The shelves are shifted relative to each other vertically by a distance equal to the inter-shelf and are set at an angle of 70-75 °. The source water distributor is made in the form of a variable cross-section pipeline with slotted holes on top. The proposed device allows the main mass of large fat particles to be separated in the settling chamber before the wastewater passes through the first part of the TP block, and the second part of the TP block creates conditions for uniform distribution of the flow, its mixing, discharge, coarsening, and residual small fat particles. 2 Il.

Description

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and drainage 12 of the treated wastewater, fat-collecting pocket 13, drainage pipelines of sludge 14 and surfaced fat mass 15.

The upper end of the partition 5 is fixed to the grease pocket 13, and the lower is located at the level of the lower ends of the shelves 4. The partition 6 is fixed to the side walls of the body with a gap relative to the bottom. A zone of turbulence forms between the partitions 5 and 6.

The casing of the industrial wastewater treatment unit and the dividing walls are made of steel, reinforced concrete, or combinations thereof, thin-layer separation units can be made, for example, steel, aluminum or oleophilic material, a separator, for example, steel, asbestos-cement or plastic pipes.

The device works as follows.

Sewage water through pipe 11 enters the distributor 3 installed on the lower inner side of the settling chamber 2. It drastically reduces the flow rate from 19.4 to 2.75 mm / s, which creates conditions for floating on the surface of the settling chamber to 68-70% of fatty substances that are discharged into the grease compartment pocket 13 and from where they are removed through the pipeline 15. Further, the waste water enters the first part of the folder block 7. Slight velocities of its movement in the inter-shelf space 4-5 mm / s

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their final fusion, coarsening and ascent in the chamber 8 of the final grease catchering takes place. Purified water, bypassing the semi-submerged partition, is discharged through the nozzle 12. All sediment in wastewater is separated in the settling chamber and the first part of the thin-layer block, from which it slides down the inclined shelves into the sedimentation chamber 9. From there, it is periodically removed through conduit 14.

In the proposed device, the process of separation of fatty substances occurs most completely in comparison with the known one. This is achieved by creating the most favorable hydrodynamic conditions for their merging, enlarging and ascending by installing the distributor, dividing the thin-layer block into two parts, increasing the angle of the shelves to 70-75 ° and creating a uniform distribution of the liquid in the thin-bed spaces. Thus, for example, a device with a total volume of the hull of 2.4 m, with its capacity of 6.93 m / h, extracts up to 96% of fatty substances from wastewater from the oil and fat mill. At their initial concentration of 1.12 - 0.179 kg / m after the passage of the device, the final is 0.05 - 0.046 kg / m. The proposed device is easy to use, does not require significant operational and energy costs.

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Claims (1)

40 claims a large 50 mm height between the shelves 4 and the angle of inclination of the shelves 70-75 create optically small conditions for separating and ascending fat particles that rise above the shelves into the pre-greasing chamber 2. The efficiency of the first part of the block is 27-50%. Further, the wastewater falls between partitions 5 and 6, where the velocities increase to 16–20 mm / s and the flow turbulization occurs. This creates conditions for the fusion of residual fat particles, the largest of which float in the chamber 8 of the final grease trap, from where they are removed to the grease pouch, and the rest with the waste water flow into the second part of the shelf unit 7, where 0 five A wastewater treatment device containing inlet and settling chambers, a thin-layer separation unit in the form of inclined shelves, a sludge accumulation zone, a grease pouch, nozzles for supplying and discharging treated wastewater, a source water dispenser, grease and sludge discharge pipelines, characterized in that , in order to increase the degree of separation of fatty substances from wastewater, reduce energy and operating costs, the device is equipped with partitions installed parallel to the inclined shelves and blocking the thin-layer separation into two parts, with the upper ± t // FIG. 2