SU1234371A1 - Device for removing suspended matter from waste liquid - Google Patents

Description

The invention relates to apparatus for the purification of liquids from suspended substances and is intended for use in a circulating water supply system, for example, enrichment plants, as well as in other branches of the national economy for the separation of solid particles from liquids.

The purpose of the invention is to increase the efficiency of cleaning waste liquid from fine mist.

FIG. 1 shows a device for cleaning liquids from polydisperse suspensions, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a view of FIG. one; in fig. 6 is a view of D in FIG. one.

The device comprises a supply pipe 1, a distribution grid 2, a pre-clarification chamber 3, at the entrance to which an air distributor 4 is installed. In this chamber a sedimentary part 5 is provided. In the thin clarification chamber 6 there are thin-layer vertical blocks 7 of inclined plates 8 with vertical goat and 9. The free space under the thin-layer blocks 7, as well as the vertical longitudinal channels between the adjacent blocks 7, are separated by partitions 10. At the exit from the thin-light chamber 6, a perforator is installed The partition 11, the Device. has a scraper mechanism 12 and a foam collection tray 13 located in the pre-clarification chamber 3. At the entrance to the fine-clarification chamber 6, a reagent preparation unit is installed, consisting of a pressure pipe 14 for distributing the first stage of the reagent supply with pipes 15, which are perforated on the side of the shelf units. In the middle part of the shelf units, a pressure pipe 16 for distribution of the second reagent supply queue is arranged, passing into perforated pipes 17. The pipes 15 and 17 are installed along the longitudinal axes of the cross sections of the inter-shelf spaces. The clarified water is pumped through the pump through the pipeline 18. The coarse suspension fraction is removed from the sedimentary part 5 of the preliminary clarification chamber 3 by means of a hydraulic elevator 19, to which the clarified water is supplied via pipeline 2343712

do 20. To enter this fraction in re-. The core unit has a pipeline 21 with pipes 22 having connections 23 directed towards the shelf blocks 5 and installed along the longitudinal axis of the cross section of the shelf shelf. The reagent comes from the reagent preparation unit 24. Shut-off valves are installed on the pipelines. About fittings 25.

: The device works as follows.

The sewage fluid through conduit 1 through the distribution grid 2 enters the pre-clarification chamber 3, where it mixes with air bubbles that flow from the air distributor 4. In chamber 3, the residual amount of flotation reagents foams and rises to the surface of the water, along with the rapid sputtering suspension coarse heavy impurities are deposited in the sedimentary part 5 of the chamber 3 of the preliminary clarification. The pre-clarified water is subjected to the first stages of treatment with a reagent, which is fed through perforated tubes 15 from the reagent preparation unit 24 through line 14. The fine slurry partially coagulates and, moving in a laminar flow, moves down to contact with the plates 8, then sticks to the plates 8 or slides along them and along the vertical channels formed by the teeth 9, is collected at the bottom of the camera 6 of a thin lightening. In the middle part of the shelf unit 7, using the perforated pipes 17, the second stage of coagulation of the unsettled suspension and its settling take place. The vertical longitudinal channel in which the sediment is collected is divided by partitions 10, which impede the movement of water and improve the process of compacting the sediment. Special slots are provided at the bottom of the bulkheads 10 to remove sediment. The clarified water passes through a perforated partition 11, which equalizes the speed of movement of water through block 7, and enters the system of collecting clarified water, from which it is discharged through the pipeline 1.8. The foam layer formed in the pre-brightening chamber 3 is shifted by the scraper mechanism 12 to the collection tray 13. The sediment accumulated

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c at the bottom of the pre-clarification chamber 3, is removed by means of a hydraulic elevator 19, into which clarified water is fed through the pump via line 20. Periodically, due to the clogging of the plates 8 of the polo box 7 and the removal of the suspension from the device, the coarse dispersed suspension the chamber 3, through the hydraulic elevator 19 through the pipeline 21 and the system 10 of the pipes 22 with nozzles 23 is fed to the plates 8 of the shelving unit 7. During this period of time, the valves 25 and 21 are open, and

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on line 18 is closed. Large particles of sediment, settling on inclined plates 8, slide into a vertical longitudinal channel, entraining the sediment accumulated on the plates formed by the fine suspension. As the plates 8 are cleaned, the sand fraction is stopped by closing the stop valves 25 on the pipe 21 and opening the stop valves 25 on the pipe 18, and the device starts to work normally. The precipitate accumulated at the bottom of the chambers 6 is removed periodically.

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Claims (1)

USSR copyright certificate No. 966020, cl. C 02 F 1/24, 1981. (54 / WEIGHTED WASTE LIQUID CLEANING DEVICE, comprising a housing, a pre-clarification chamber with sedimentary sediment; a part, a thin clarification chamber with inclined plate blocks provided with vertical visors placed at their lower edges, an air distributor , scraper mechanism, foam collection tray, pipelines for supplying the initial and discharge of clarified liquids and sludge, distinguishing it with the fact that, in order to increase the efficiency of wastewater treatment from fine suspension, it is equipped with a unit reagent preparation, perforated pipes connected to the reagent preparation unit and located at the entrance to the fine clarification chamber and its middle part and connected to the sedimentary part. preliminary clarification chambers and located at the entrance to the fine clarification chamber with pipes with nozzles directed towards the shelf units while the perforation of the pipes installed at the entrance to the chamber of fine clarification is made from the side of the shelf units.