RU2321546C2 - Plant for purification of sewage water in circulating water supply systems at cleaning transport facilities - Google Patents

Abstract

FIELD: purification of sewage water from sand and other suspended matter, petroleum products, as well as decontamination of cleaned service water in circulating water supply systems at cleaning transport facilities.

SUBSTANCE: proposed plant includes hydraulic cyclone, oil separator, thin-layer shelved settler, final cleaning filter with cleaned water reservoir. Hydraulic cyclone is equipped with pipe lines supplying dirty water for cleaning and is communicated with thin-layer shelved settler by means of water discharge pipe line; it is also communicated with oil separator by means of watery petroleum product discharge pipe line. Thin-layer shelved settler is communicated with final cleaning filter by means of water discharge pipe line. Oil separator is communicated with thin-layer shelved settler by means of settled water discharge pipe line. Hydraulic cyclone, oil separator, thin-layer shelved settler and final cleaning filter are communicated with sludge receiver. Floatation unit is arranged in upper part of reservoir where thin-layer shelved settler is mounted.

EFFECT: high degree of purification of sewage water in circulating water supply systems at washing transport facilities.

4 cl, 3 dwg

Description

The present invention is intended for the treatment of wastewater from sand and other suspended solids, oil products, as well as the disinfection of purified industrial water in water recycling systems when washing vehicles.

A known installation that can be used for wastewater treatment in water recycling systems when washing vehicles (RF Patent No. 2047567, 1991), comprising a washer, a coarse filter, a two-section settler with labyrinth oil separators, an ultrafiltration unit, a sludge treatment unit technological pipelines.

A disadvantage of the known installation is that it does not provide sufficient completeness of treatment and the use of waste in the treatment of wastewater generated after washing cars.

The objective of the present invention is to increase the degree of wastewater treatment in water recycling systems when washing vehicles.

The problem was solved by creating an installation for wastewater treatment in water recycling systems for washing vehicles containing a hydrocyclone, an oil separator, a thin-layer shelf sump, a post-treatment filter with a purified water tank, in which the hydrocyclone is equipped with a dirty water supply pipe for treatment and communicated with a water drain pipe from a thin-layer shelf settler located in the tank, and a pipeline for discharging water-filled oil products with an oil separator, a thin-layer shelf settler with is generalized by a water drain pipe with a post-treatment filter, the oil separator is communicated by a settling water drain pipe with a thin-layer shelf settler, while a hydrocyclone, oil separator, a thin-layer shelf settler, and a after-treatment filter are communicated with a sludge collector, while in the upper part of the tank in which the thin-layer floor is located flotator.

The specified set of features provides a more complete water purification and efficient use of waste.

The presence of a flotator in the upper part of the tank, in which the thin-layer shelf sedimentation tank is located, provides a more complete purification of water from suspended particles that have not settled down when passing through the thin-layer shelf sedimentation tank.

It is advisable that the installation was equipped with a tank (tank) with a generator-electrolyzer for the production of a disinfecting solution from a solution of sodium chloride.

The supply of a disinfecting solution to the installation ensures the removal of microorganisms and the disinfection of the medium.

It is advisable that the tank of purified water was equipped with at least one electric heater.

The presence of an electric heater ensures that the temperature of treated water is maintained at a given level.

It is advisable that the treated water tank be equipped with an excess water discharge pipe in communication with the sludge collector.

The presence of a pipeline for the removal of excess water eliminates the possibility of emergency overfilling of the installation.

Figure 1 shows a schematic diagram of the installation, figure 2 is a side view of the installation, figure 3 is a top view.

The installation comprises a hydrocyclone 1, an oil separator 2, a thin-layer shelf sedimentation tank 3, a post-treatment filter 4 with a purified water tank 5. The hydrocyclone 1 is equipped with a dirty water supply pipe for treatment 6 and is communicated with a water drainage pipe 7 with a thin-layer shelf sedimentation tank 3, and a pipeline for discharging waterlogged oil products 8 with oil separator 2. Oil separator 2 is communicated with a settling water discharge pipe 9 with a thin-layer shelf settler 3, and a thin-layer shelf settler 3, in turn, is communicated with a drain pipe water and 10 post-treatment with filter 4. To reset sludge accumulated during the operation, the hydrocyclone 1, lamellar shelf sump 3, a filter 4 and posttreatment oil separator 2 communicated with a piping system chip catcher 11 (not shown). The unit is equipped with a tank 12 with a generator-electrolyzer (GOR) for producing a disinfecting solution from a solution of sodium chloride. The disinfecting solution enters the hydrocyclone 1 through the tube 13, a clamp 14 is installed on the tube 13 to regulate the flow of the disinfecting solution 14. For a possible water heating in the treated water tank 5, an electric heater (TEN) 15 with a temperature regulator 16 is installed. The installation is also equipped with a water meter 17, block control 18 of the electric heater 15 and the power supply 19 for the generator-electrolyzer. The plant is equipped with a pipeline 20 to feed clean water from the water supply system, a pipeline 21 is designed to draw purified water to the high-pressure apparatus, and an emergency overflow pipe 22 is connected to the piping system 11. The after-treatment filter 4 is provided for overflowing the unit with overflow of the installation 5. filled with a layer of floating granules of expanded polystyrene 23 with a diameter of 3-5 mm, over which a grating 24 is located. Installation is made with a flotator 25 with a foam collector 26 located above the thin layer an upper flange clarifier 3 in its upper part, while a thin-layer flush clarifier 3 is in communication with a post-treatment filter 4 through a flotator 25. To ensure the flotator 25, the unit is equipped with a circulation pump 27, a saturator 28, a pipe 29 for supplying air-saturated water to the flotator 25, a unit control 30 of the flotator 25. The installation can be equipped with a capacity of 31 with a coagulant solution, which enters the hydrocyclone 1 through a tube 32 through an electromagnetic valve (not shown in the drawing). The oil products separated in the installation are drained through the nozzle 33, the foam is discharged from the foam collector 26 through the nozzle 34.

The installation is made of welded steel sheet 3 mm thick, protected from corrosion, equipped with covers and a ladder. The installation frame consists of two parts connected by bolts, which facilitates the transportation and installation of the installation. Technological pipelines are made of solid steel pipes with a corrosion-resistant coating, as well as hoses made of polymeric materials.

Installation works as follows.

The installation is connected to a technical or drinking water supply network, as well as to an electrical network with a voltage of 220 V. When the installation is operating, wastewater from a sand trap is piped 6 by a submersible pump (not shown in the drawing) to hydrocyclone 1, where coarse suspended particles are separated, then pipe 7 by gravity pours into a thin-layer sump 3, from which partially purified water through pipe 10 enters the post-treatment filter 4, where it is filtered through a layer of floating granules of expanded polystyrene 23 with a diameter of 3-5 mm, over which there is a grating 24, which does not allow the granules of expanded polystyrene to float to the surface. Purified water is collected in a tank 5, located above a layer of floating granules of expanded polystyrene 23 and a lattice 24. Then water from a thin-layer shelf sump 3 rises into the flotator 25. A device (not shown) is mounted in the flotator 25 to distribute air released from the water, supplied by the circulation pump 27 through the saturator 28 through the pipe 29. The circulating water saturated with air is supplied to the flotator 25 through the pipe 29. Small air bubbles released in the flotator 25 capture surfactant, not products is envisaged and lighter particles of mineral slurry, forming a foam, pop the top of the skimmer. To extinguish and drain the foam, circulating water is used that enters through the nozzles of the collector 35 located above the water surface in the flotator 25. The foam is discharged through the drain threshold into a foam collector 26, from where it is discharged through a nozzle 34 into a portable container or directly into the sludge collector.

Turning on and off the circulation pump 27, as well as the magnetic coagulant supply valve, occurs automatically simultaneously with the submersible pump. After the flotator 25, partially purified water through a pipeline 10 enters the post-treatment filter 4, where it is filtered through a layer of floating granules of expanded polystyrene 23, and the purified water is collected in a tank 5.

The clean water is taken to the washing equipment from the tank 5 through a pipe 21, if necessary, with the help of an electric heater 15, the water in the tank 5 is heated to a temperature of no higher than 40 ° C. The preset temperature is maintained using the temperature controller 16, which, when the preset water temperature is reached, automatically turns off the electric heater 15 and turns it on again when the temperature drops, a manual mode for turning the electric heater on and off 15 is also provided. Irreversible losses of circulating water (5-10%) are compensated from a water supply system through a pipeline 20.

The sludge accumulated during operation of the unit in a hydrocyclone 1, oil separator 2, a thin-layer sump 3 and a post-treatment filter 4 is periodically discharged together with the wash water into the piping system 11, from where the wash water with sediment is discharged into the sludge collector (sludge collecting well).

The washing of the hydrocyclone 1 and the thin-layer sump 3 is carried out by the water located in them, and the filtering floating load in the aftertreatment filter 4 is carried out with water from the purified water tank 5 (reverse current), which is filled to the maximum design level before washing the filter. During the washing of the hydrocyclone 1 and the thin-layer sump 3, the flow of purified water and disinfecting solution is stopped.

The duration of work between rinses depends on the operating mode of the sink and the degree of water pollution. The optimal duration between flushing the installation is determined during its operation.

The mode of supply of the disinfecting solution is regulated using the clamp 14 on the tube 13 depending on the composition and flow rate of contaminated water. The mode of supply of the coagulant solution is controlled by clamp 14 on the tube 32, depending on the composition and flow rate of contaminated water.

If the calculated water level in the treated water tank 5 (emergency condition) is exceeded, its excess can be discharged through the emergency overflow pipe 22 and the piping system 11 into the sludge collector.

The claimed installation in comparison with known installations of the same purpose provides a higher degree of wastewater treatment in water recycling systems when washing vehicles.

Claims (4)

1. Installation for wastewater treatment in water recycling systems when washing vehicles, containing a hydrocyclone, an oil separator, a thin-layer shelf sump, a post-treatment filter with a purified water tank, in which the hydrocyclone is equipped with a dirty water supply pipe for treatment and communicated with a water drain pipe with a thin-layer shelf a sump, and a pipeline for the discharge of waterlogged oil products with an oil separator, a thin-layer shelf sump is connected by a pipeline for water drainage with a filter The oil separator is communicated by a settling water discharge pipe with a thin-layer shelf sedimentation tank, with a hydrocyclone, an oil separator, a thin-layer shelf sedimentation tank, and a post-treatment filter communicating with the sludge collector, while a flotator is located in the upper part of the tank in which the thin-layer shelf sedimentation tank is located. 2. The installation according to claim 1, which is equipped with a container with a generator-electrolyzer for producing a disinfecting solution from a solution of sodium chloride. 3. The installation according to claim 1, in which the purified water tank is equipped with at least one electric heater. 4. The installation according to claim 1, in which the purified water tank is equipped with an excess water discharge pipe in communication with the sludge collector.

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