RU128634U1 - STATION FOR CLEANING STRAIN WATER UNDER THE CONDITIONS OF SOCHI - Google Patents

Abstract

A device for treating storm water in Sochi, including storm sewer collectors, regulating the flow of accumulating tanks, a storm water treatment device, rainwater for conditionally clean storm water, a device for thickening and dewatering the separated sewage sludge, while the treatment device is equipped with a thin layer sump, reagent farm and sorption filters, characterized in that in the storm water treatment station, water treatment devices are involved in the follower Thin-layer sumps with preliminary introduction of exclusively high molecular weight positively charged flocculant into water, then a ruff filter filled with a ruff nozzle with a positively charged chemical fiber, and, in conclusion, bag filters filled with granular sorbent S-Verad, dehydrated compacted sediments are dehydrated in bagged dehydrators re-bags for activating the oil-retaining sorbent.

Description

The utility model relates to devices for the treatment of storm sewage and can be used in public utilities of residential areas and industrial sites, as well as for the treatment of storm water from transport highways, gas stations in the conditions of Sochi.

It is known to use a device [1] for storm water treatment, including storm water inlet and outlet collectors, storm water accumulation and purification units, conditionally clean storm water bypass storm water piping, inspection wells on storm water accumulation and purification nodes, wherein the storage tank is made in the form of a pipe with pits at the beginning and its end for the accumulation of sand and other mechanical impurities, the treatment unit consists of filter elements of granular expanded clay, then mineral wool and sorption mats and covered by removable plates for periodic replacement of filter elements, the storm water treatment unit cylinder is equipped with two hoops-supports with loops around the cylinder perimeter for turning around the longitudinal axis during operation.

Unfortunately, the known device [1] in the conditions of the city of Sochi with a large amount of construction and installation work and road transport of building materials and soil

quickly silt during rains and requires frequent replacement of filter elements.

Closest to the proposed new technical solution is a description of the treatment plant proposed in the patent for a utility model [2]. In a known technical solution, the treatment plant includes a coagulator-flocculator with the introduction of reagents and is equipped with cassettes with a brush nozzle, a thin-layer sump with a cross flow pattern of water and sediment, and a filter with a three-layer granular charge of anthracite, modified nitrogen-containing coal and zeolite, equal in height to the layers. Storm water is supplied from storage tanks.

Observations of the operation of the storm water treatment plant, the implemented technical solution [2], showed that up to 80% of the mechanical impurities of storm water collected from the road section passing along the Mzymta River Gorge in Krasnaya Polyana settles in the storage tank and does not need coagulation or flocculation . In addition, the very low buffering of rainwater in carbonate equilibrium leads to the fact that when a coagulant having an acidic reaction in solution is introduced into the water to be purified, acidification of storm water occurs without alkali addition and effective sedimentation of storm water in a thin-layer sedimentation tank does not occur. Flocculation is more effective suspended storm water substances with a high molecular weight flocculant Praestol-853, which has a positive charge, but does not change the pH of storm water. It is advisable to carry out this process immediately after the accumulation tank, so that subsequent post-treatment units are less loaded with suspended solids and do not require frequent washing, regeneration, and other operations of the treatment plant.

The objective of the utility model is to reduce the cost of operating a storm water treatment plant, to dewater the precipitates, and to stabilize the quality of treated water during the rainy season.

The problem is solved due to the fact that in the known design of the stormwater drainage network, including stormwater receivers, storm sewer collectors that control the flow of stormwater, storage tanks are equipped with a reagent assembly for preparing a solution of a high molecular weight positively charged flocculant with a metering pump for reagent solution into a pressure head pipe immersed in the accumulator the pumping unit tank, the treatment plant is equipped with thin-layer sedimentation tanks with a counter-flow scheme water and sediments, with a after-treatment filter and a deep oil removal sorption filter placed in a fabric bag, the spent sorbent is disposed of together with the sediment from storage tanks and a thin-layer sump after thickening and dehydration in the same bags that are used to hold the sorbent in bags produce and heat dehydrated sediments to a temperature of 80 ° C for disinfection of sediments before being sent for disposal as soil for the restoration of disturbed areas.

An analysis of the known technical solutions related to wastewater treatment devices in a similar combination and their mutual arrangement showed that no technical solutions containing the same set of essential features as in the inventive treatment plant were found.

This allows us to conclude that the inventive treatment device meets the criterion of "novelty." An analysis of the essential features that are distinctive from the prototype showed that such or similar features were not found in the known technical solutions with such a combination of placement and relative position, which allows us to conclude that the claimed treatment device meets the criterion of "significant differences".

The design of the storm water treatment plant in Sochi is illustrated by the drawings, where in FIG. 1. The technological scheme of the collection, accumulation and purification of storm water, accumulation, thickening, dehydration and disinfection of precipitates from storm water is shown. Figure 2. Shows a general view of the block containers for the placement of equipment used for cleaning, disinfecting storm water, collecting and preparing for disposal of precipitated storm water.

Designations in Fig.1,2

1. Road section

2. Storm receiver

3. The manhole of storm sewers

4. Storm collector

5. Storage tank

6. Sand trap, trap of floating impurities

7. Rainfall of conditionally pure waters

8. Submersible pump for the supply of storm water to the treatment plant

9. Stormwater treatment plant

10. A pipe for introducing flocculant into the pressure pipe of the pumping unit 8.

11. Installation of "autoflock" reagent farm

12. Thin-layer sedimentation tank

12.1 Shelf space

12.2 Sin for introducing storm water into the sump

12.3 Trap for introducing storm water into the sinuses of the sump

12.4 Trap for drained storm water

12.5 Pyramidal bottom of a thin-layer sedimentation tank

13. Ruff filter

13.1 Cassette for mounting a brush nozzle

13.2 Ruff nozzle

13.3 Bubblers of regeneration of a brush nozzle 13.2

13.4 Semi-submersible bulkhead

13.5 Release of regeneration water of the brush filter

14. Blower

15. Sorption filter

15.1 Sorbent bag S-Verad

15.2 Perforated Stormwater Inlet Pipeline

16. The release of clarified water from the treatment plant in the Ural Federal District

17. Ural Federal District

18. Bag dewatering devices

19. The pump for pumping sludge from a thin-layer sump 12 and ruff filter 13 to the sediment compactor 26.

20. The pipeline supply of sediment to the pump 19

21. The pressure pipe supply of sediment to thicken the precipitator 26 and then to the dewatering device 18.

22. Pipeline for drainage of sludge water from dewatering rainwater storm sediments into an accumulation tank 5.

23. Entrance door to the container block of the treatment plant

24. Reagent warehouse

25. Switchboard

26. Precipitation

27. Discharge of supernatant water into the tank 5

28. The pipeline supply of compacted sediment to the device 18

29. Release of treated storm water to surface water.

30. Thermostat for heating in bags of dehydrated sludge. The storm water treatment device in the conditions of the city of Sochi receives storm water for treatment, coming, for example, from the road section 1 through a storm water inlet 2 to a sewer storm collector 4 having inspection wells 3, stormwater discharge 7 of conditionally clean water, an accumulation tank 5 with a dedicated compartment under sand trap and trap 6 floating impurities. In the tank 5, a submersible pump 8 is mounted with a uniform flow rate, which supplies storm water through a pressure pipe to a treatment plant 9 of storm water. From the sewage treatment plant 9 through the pipeline 29 release purified storm water is discharged into the surface watercourse. The treatment device 9 has an Autoflock installation of a reagent farm 11 for introducing a flocculant solution into the pressure pipe through the pipe 10. A mixture of storm water and flocculant enters the thin-layer sump 12 through the trays 12.3 in the sinuses 12.2 and rising up inside the shelf space 12.1 flows into the drain pan 12.4. The flocculated impurities of suspended particles of storm water settle from the shelf space into the pyramidal bottom 12.5. From the pyramidal bottom 12.5, sludge is transported through pipeline 20 to a pump 19 for pumping sludge from a thin-layer sedimentation tank 12 into a sediment compactor 26 via a pressure pipeline 21 and then through a pipeline 28 to bag dewatering devices 18. The supernatant that has separated in the sediment compactor 26 is drained into a storage tank 5. From a thin-layer sump 12, clarified water through a semi-submersible baffle 13.4 enters the brush filter 13. Inside the brush filter 13, cartridges 13.1 are mounted with a fixed brush nozzle 13 .2 polyamide fibers and bubblers 13.3 brush tip regeneration. For the release of regeneration water, an exhaust pipe 13.5 is provided, which discharges regeneration water into the storage tank 5. The air for the bubblers 13.3 comes from the blowers 14 (one working and one backup).

The storm water purified in the brush filter 13 flows into the sorption filters 15, which are fabric bags 15.1, inside which the sorbent S-Verad is poured. Water is poured into the sorbent through a perforated pipe 15.2. Strain water filtered through the sorption filter 15 through the exhaust pipe 16 is disinfected into a UV device (ultraviolet disinfection) 17, and then to the outlet 29 into a surface water body. To discharge the water separated in the bag dehydrators 18, a pipe 22 for discharging water into the storage tank 5 is provided.

The storm water treatment device has doorways 23 in the block containers, a reagent warehouse 24, an electrical panel 25, and a thermostat 30 for heating dehydrated sludge in bags.

The storm water treatment device operates in the conditions of Sochi as follows.

Stormy water flowing from a section of highway 1 or from a parking area of a vehicle is filtered through a grate of a stormwater inlet 2 along a collector 4 with rotary and linear inspection wells 3 collected in an accumulation tank 5. The rains in Sochi continue for a long time, sometimes for several days, therefore gradually storm water flows become less polluted and can already be classified as conditionally clean; therefore, a storm drain 7 is provided in the accumulating tank to discharge conditionally clean storm water, bypassing treatment plant 9. Zagrya Significant waters pass through the compartment of the storage tank 5 allocated for the sand trap and the trap of floating impurities 6 and are supplied to the storm water treatment station 9 via the submersible pump 8. From the reagent farm 11, the autoflock device enters the pressure pipe from the submersible pump 8 through a special pipe 10 a high molecular weight positively charged flocculant, for example, Praestol-853, into a storm water stream. The flocculant does not change the reaction of the medium, the pH, therefore, does not require the introduction of an alkaline reagent and does not add metal oxides to the rainfall. Since, according to observations in the storage tank 5, up to 80% of all storm water suspensions are deposited, the required dose of flocculant is 1 ... 2 g / m ³ instead of 30 ... 50 g / m ^{3 of} coagulant.

As a result of the studies, the storm water stream supplied by the submersible pump 9 with a concentration of suspended solids up to 200 mg / l after treatment with a positively charged flocculant and the formation of suspended flakes in the sinuses 12.2 after trays 12.3 at a downward flow speed of no more than 20 mm / s in the shelf space 12.1 a thin-layer sump 12 at distances between shelves 12.1 50 mm and movement at a speed of 4 ... 5 mm / s is clarified by 85 ... 90% and, flowing into the drainage tray 12.4, is close in composition to the quality standard for discharge in fisheries water body. The flakes of the separated sediment settle into the pyramidal bottom 12.5 and are periodically pumped out through the pipeline 20 by means of the pump 19 through the pressure pipe 21 to the sediment compactor 26 with the subsequent release of the compacted sediment through the pipeline 28 to the bag dewatering device 18, and the supernatant is discharged through the pipeline 27 to the accumulation tank 5. Drainage water is also discharged to the accumulation tank 5 through a pipe 22, which is separated from the sludge in bag dewatering devices 18. From a thin-layer sump 12 through a half the baffle 13.4, the clarified storm water flows into a ruff filter 13, equipped with cartridges 13.1, filled with a ruff nozzle 13.2 of positively charged polyamide fibers, bubblers for regeneration of the ruff nozzle 13.3 and a waste pipe 13.5 equipped with a magnetic valve.

The use of a flocculant rather than coagulants, a thin-layer sump and a brush filter with a positively charged fiber nozzle basically solves the problem posed in the utility model for reducing the cost of operating a storm water treatment plant, reducing the amount and cost of releasing and dewatering rainwater storms, since it is not necessary to change filter nodes, the amount of precipitation is not added due to the introduction of sediment-forming reagents. The regeneration of the ruffs is carried out automatically, according to the timer, turning the blower 14 on and off and opening the magnetic valve on the discharge pipe 13.5. The quality parameters for petroleum products are adjusted in a sorption filter 15, consisting of fabric bags 15.1 filled with S-Verad sorbent, with water supplied into the bag through a perforated pipe 15.2.

Considering that oil products are extracted by 90 ... 95% during preliminary cleaning in a storage tank 5, in a thin-layer sump 12, are adsorbed on polymer fibers in a brush filter 13, the sorption capacity of the sorbent in the sorption filter 15 is enough for a year of operation. At the same time, bags 15.1 for holding the sorbent after exhausting the sorption capacity of the sorbent are used repeatedly in the bag dewatering device 18. The quality of treated storm water at outlet 29 and when entering through the pipe 16 to the Ural Federal District 17 is stable over time because it practically does not depend on the qualification and discipline of the service staff. The operating mode of the treatment plant is established during commissioning by qualified specialists and the work of the maintenance personnel consists in the timely replacement of bags in the dewatering device 18, replenishment of the flocculant stock in the warehouse of 24 reagents, in the maintenance of mechanisms, pumps 8 and 19, blowers 14, metering pumps in the installation "Autoflock" 11, monitoring the operation of the lamps in the device 17 of the Ural Federal District, monitoring the condition of the electrical panel 25, timely lubrication of the hinges on the entrance doors 23, maintaining the temperature in Thermostat 30 for disinfection of bags in dehydrated sewage sludge.

Claims (1)

A device for treating storm water in Sochi, including storm sewer collectors, regulating the flow of accumulating tanks, a storm water treatment device, rainwater for conditionally clean storm water, a device for thickening and dewatering the separated sewage sludge, while the treatment device is equipped with a thin layer sump, reagent farm and sorption filters, characterized in that in the storm water treatment plant, water treatment devices are involved in the follower Thin-layer sumps with preliminary introduction of exclusively high molecular weight positively charged flocculant into water, then a ruff filter filled with a ruff nozzle with a positively charged chemical fiber, and, in conclusion, bag filters filled with granular sorbent S-Verad, dehydrated compacted sediments are dehydrated in bagged dehydrators re-bags for activating the oil-retaining sorbent.

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