SU1758005A1 - Purification works for automobile washing sewage - Google Patents

Abstract

SUMMARY OF THE INVENTION: A wastewater treatment plant for car wash liquids includes an initial sewage pipe, an underground receiving tank with a pump, first and second stage sumps, first and second stage filters, a sediment bunker, and a purified liquid tank. The third-stage filter and the rinsing liquid tank are periodically communicated through the third-stage filter to the purified liquid tank. The total residue of pollution on the HOL of the vehicle does not exceed 0.05 N 7 cm2. 1 silt

Description

The invention relates to sewage treatment plants and can be used in the maintenance and repair of transport equipment for cleaning and reuse of process fluids from car washing.

A known installation for washing trucks with a sewage treatment plant, comprising an installation for exterior washing, a sump, a sewage pump, an installation for water purification using the accelerated sludge, an oil separator, an oil sump, a rinsing frame and connecting pipes.

A disadvantage of the known installation is that clean water from a water main is used for rinsing cars after washing the purified liquid.

A wastewater treatment plant is known for liquids from washing cars and buses, including a source drain pipe, an underground receiving tank with

pump, sedimentation tanks of the first and second stages, filters of the first and second stages, a bunker of gray sludge sediments and a reservoir of purified liquid.

The disadvantage of the prototype is the low degree of car washing, since the cleaned liquid after the cleaning plant forms on the car's surface a thin coating of colloidal dispersion contaminants that negatively affects the quality repair of the car and the maintenance of it.

The aim of the invention is to increase work efficiency and water saving.

This goal is achieved by the fact that wastewater treatment plants for liquids from car washing, including a pipe for initial wastewater, an underground receiving tank with a pump, sumps for the first and second stages, filters for the first and second

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the steps, the sludge bunker and the reservoir of the purified liquid are equipped with a third-stage filter and a rinsing fluid tank connected in series, and the third-stage filter is connected to the reservoir of the purified liquid by a pipeline.

Supplying the device with a filter of the third stage and a rinsing liquid reservoir ensured an increase in the quality of car washing due to rinsing it after the process of washing with purified liquid that underwent additional treatment in the third stage filter, allowed to wash off a thin coating of colloidal dispersion degree from the car surface, and also provided saving pure water, as for rinsing automobiles, the liquid from their washing is used, having previously gone through all the stages of cleaning from pollution from cleaning x-equipment and third filter stages.

Performing a rinsing fluid tank and a third-stage filter in series, as well as connecting the pipeline to the third-stage filter valve with the purified liquid tank, allowed the difference in the liquid levels in the tanks to fill the rinsing liquid tank and the rinsing liquid reverse flow to regenerate third stage filter.

The drawing is a diagram of the wastewater treatment plant for car wash liquids.

The device comprises a washing machine 1, an initial sewage pipe 2 connected to an underground receiving tank 3, a pump 4 for transferring draining liquid from an underground receiving tank 3 via pipeline 5 to successively connected first-stage sumps G and a second-stage sump 7. A second stage sump 7 with a first stage filter 9 with coarse loading, a second stage filter 10 communicating with it with a floating granular load, a pipe 11 connecting the second stage filter 10 with a tank, cleaning liquid 12, pump 13, supplying purified liquid from tank 12 through conduit 14 to hydrants 15 of washing machine 1, third stage filter 16 and rinsing liquid tank 17, sequentially connected by pipelines 18 and 19 with purified liquid tank 12, pump 20 supplying rinsing liquid from the tank

17 through the pipeline 21 to the hydrants 15 of the washing machine 1, the bunker of sludge 22, the oil separator 23, the oil pan 24 and the sludge discharge mechanism 25.

The sumps 6 and 7 are connected by a pipe 26, and the filters 9 and 10 are connected by a pipe 27. The sump 6 is provided with an inclined grate 28 for quenching the flow rate of the liquid. Settlers 6 and 7 are installed on

0 supporting portal 29. The pipeline 18 is equipped with an adjustable valve 30. The sump 7 of the second stage is equipped with packages speed sedimentation plates 31.

Filter 16 third stage cleaning,

5, intended for additional treatment and liquid from contaminants of colloidal dispersion degree, can be made in the form of a horizontal body divided by vertical transverse partitions into intercommunicating settling zone and filtration zone in which the filter with floating granular load is located.

The device works as follows.

The washing machine 1 by the pump 13 supplies liquid from the tank 12 through the pipeline 14 to the hydrants 15 of the washing machine 1 in the form of high pressure jets. Due to the shock

In the case of liquid jets, the car surface is cleaned from contamination. Then, the liquid saturated with washed soils (mineral particles and oily soils),

5 through pipe 2 of the source effluent through the grates flows into the underground receiving tank 3, from where by pump 4 through pipeline 5 is fed to the inclined quench grid of the stream 28 to the settling tank b of the first stage, in which

0, coarse suspended matter is deposited and oily contaminants rise to the surface of the liquid. Then, the cleaned fluid through pipe 26 is flowed by gravity into the second-stage septic tank 7 to fast sedimentation plates 31, where the technological solution is more thoroughly cleaned from solid and oily contaminants. Oil and other oily contaminants accumulating in the upper part of the second settling tank 7, periodically when the upper level is reached through the oil separator 23, are discharged into the oil collector 24. The purified liquid from the settling tank 7 of the second step flows by gravity through the pipe 8 into the filter 9 first steps and then, via pipe 27, to a second stage filter with a floating granular load, where deep cleaning of the liquid from oily and solid contaminants takes place.

The purified liquid through the pipeline 11 flows into the tank 12. from where it enters the hydrants 15 of the washing machine 1.

The adjustable valve 30 operates in such a way that the tank 17 is filled with rinsing liquid during car wash, as set by the process. From the reservoir 12 of the purified liquid, part of the liquid, due to gravity, passes through conduit 18 to the third-stage filter 16, where the liquid is deeper cleared from contaminants of colloidal dispersion. Further, the liquid through the pipeline 19 enters the tank 17. This liquid is used for the final rinsing of cars at the end of their washing. Liquid from the tank 17 to the hydrants 15 of the washing machine 1 is supplied by the pump 20 through the pipeline 21 when the pump 13 is turned off.

When the third stage filter is clogged, it can be washed with the pump 20 turned off and the pump 13 turned on - simultaneously with the process of washing the car with the cleaned solution, with the adjustable valve 30 fully open. Liquid from the tank 17 to the tank 12 through the filter of the third stage 16 - when this occurs, the effection is cleaned by its reverse flow of rinsing liquid

As the solid contaminants (sediment) accumulate in the settling tanks 6 and 7, these sedimentation tanks are cleaned using the sludge discharge mechanism 25,

The invention makes it possible to increase work efficiency by improving the quality of washing the surface of automobiles and to ensure the saving of clean water. In addition, the proposed device provides periodic regeneration of the filter of the third stage and thereby increases its reliability.

The total residue of pollution on the surface of the car does not exceed 0.05 mg / cm2. In addition, each car is saved for cleaning up to 1.1 m of water, eliminating the need for its collection from the city sewer.

Claims (1)

Invention Formula Wastewater treatment facilities for car wash liquids, including an initial sewage pipe, an underground receiving tank with a pump, a first and second stage sump, first and second stage filters, a mud sedimentation tank and a cleaned liquid reservoir that, in order to increase work efficiency and water saving, they are equipped with a third-stage filter and a rinsing liquid tank, the filter of the third stage is connected by a pipeline to a valve with a tank of purified meat dkkost. /   1G 22