JPS6174693A - System for treating waste water of car washing - Google Patents

Abstract

PURPOSE:To separate automatically oil-components, miscellaneous waste, etc. from the waste water of car washing contg. miscellaneous dust, oil-components, sludge, etc. and to release the same as the waste water meeting the effluent standard for sewerage by treating adequately the waste water with the 1st and 2nd dust removers. oil-water separating tank, sludge separator, etc. CONSTITUTION:The waste water in a waste water through 2 installed in a car washing shop 1, etc., is conducted to a waste water storage tank 3 and the miscellaneous waste is gathered by a scraper 4 to a prescribed place and is removed by the 1st dust remover 6 (coarse-meshed). The waste water in the tank 3 is conducted through the 2nd dust remover 14 (fine-meshed) to the oil-water separating tank 17. The oily water floating in the tank 17 is removed by an oil skimmer 26 and the waste water, etc. in the intermediate layer are pumped 31, 32 and are released into the sewerage. The sludge in the bottom layer of the tank 17 is conducted by sludge pumps 36, 37 to the sludge separator 41 by which the sludge is separated from the waste water and the separated waste water is returned to the tank 17. The oil-components, miscellaneous waste, etc. in the waste water of car washing are thus automatically separated away and is released as the waste water meeting the effluent standard for sewerage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wastewater treatment system for a car wash installed at a collection point for garbage collection vehicles that collect garbage from households, etc., or at a car repair shop.

As car wash facilities become larger and larger, a large number of cars are washed and cleaned using pressure steam every day, and a large amount of garbage, sand, mud, oil, etc. flows out along with the washing water, and it is difficult to discharge this wastewater into the sewer system. In order to comply with the sewerage discharge standards regulated by law, it is necessary to remove garbage and oil from the wastewater, and it is essential to install wastewater treatment equipment.

This invention is designed to efficiently and automatically perform consistent wastewater treatment that can cope with the expansion of car washes, washing facilities, etc., in view of the two realities.

This was done with the purpose of making it possible.

That is, the car wash wastewater treatment system according to the present invention guides wastewater from a drain installed in a car wash or the like to a wastewater storage tank, and collects garbage in a predetermined place using a scraper, and collects it in a first dust remover. The wastewater in the storage tank is led to the oil-water separation tank via the second dust remover, and the floating oil-water in the oil-water separation tank is removed by an oil skimmer, and the middle layer wastewater is pumped out by a pump and discharged to the sewer. The sludge in the bottom layer of the oil-water separation tank is guided to a sludge separator by a sludge pump and separated from waste water, and the separated waste water is returned to the oil-water separator.

According to this invention, garbage, oil, dirt, etc. are mixed into the washing water in a drainage ditch installed at a car wash, etc., and some of the garbage and dirt sink to the bottom of the ditch. accumulate. Therefore,
These garbage, sludge, etc. are collected in a predetermined place by a scraper running in the trench, where the garbage flows into the first dust remover, and is further collected by the second dust remover (fine) to remove fine residual dirt. While the waste is removed, the wastewater is led to an oil-water separation tank, where the oil is separated and removed by a nuquimer. On the other hand, the sludge settled at the bottom of the oil-water separation tank is discharged by a sludge pump and removed by a sludge separator, and the separated waste water is returned to the oil-water separation tank.

The middle layer of wastewater in the oil-water separation tank and the upper part meet the sewer discharge standards, so it is discharged into the sewer by a drainage pump. In this way, oil, garbage, etc. in the car wash/cleaning wastewater are automatically separated and removed, and the wastewater is discharged as wastewater that meets sewer discharge standards.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the drawing, (1) is a washing place for automobiles (A,), (2
) is a drainage ditch provided on the minus side of the washing area (1), and (3) is a wastewater storage tank provided at the end of the ditch or in the center of the ditch.

Inside the drainage ditch (2), a scraper (4) is installed to run along the ditch (2) to scrape up trash and sedimented mud and sand.
A dust removal screen (5) is installed at the entrance of the waste water storage fir3) where garbage etc. are accumulated, and a rake-type first dust removal machine (6) (
Coarse mesh) is provided. [7] In front of the washing area (1), drainage ditch (2) and dust removal screen (5), there is a water pump (8) and a water supply pipe (9) from the industrial water tank (7).
) QI Ql) (12 (1:l) is used to supply washing water, and on the other hand, although not shown, steam for car washing is supplied.

0→ is the second dust remover (details), and the waste water in the waste water storage tank (3) is supplied through the pump 0υ and the drain pipe 0Q, where fine garbage in the waste water is removed, and the waste water is transferred to the adjacent The water is led to an oil/water separation tank (Of') provided by a drain pipe (G). The oil/water separation tank 07) is provided with a mountain-shaped intermediate weir (II) in its center, dividing it into two sections ii!ii 'M ei
Kl&]) is formed, and the waste water from the second dust remover 04) is discharged above this intermediate weir. @(a)(c)(c) is the fresh water supply pipe to the second dust remover 0■ and the oil/water separation tank α, and the water supply pipe (9)
It is connected to the. Note that the water discharge end of the fresh water supply pipe 041@ is provided at a position farther than the intermediate weir (11), and the water discharge end of the fresh water supply pipe @ is located above the intermediate weir 0.

An electric oil skimmer is installed in the upper part of the compartment Qυ of the oil-water separation tank αη to remove floating oil and the like, and the oil is led to a treatment tank (not shown) through an oil drain pipe (A).

The waste water that does not contain oil from the upper part of both compartments 4 (c) of the oil/water separation mQ is drained into a drainage basin (g) by a drain pipe.
The waste water in the lower layer is pumped out by pumps 0 and 0, and is led to the drain sump ζ1 by the drain pipes (to) (b), and the accumulated waste water in this drain is collected by the drain pipes (to). Discharged into the sewer system.

The sand and mud accumulated at the bottom of the oil-water separation tank Q7 is pumped out by the sludge pumps (7) and (9), supplied to the sludge separator 0υ through the sludge pipe (G) OIoo, and thrown into the container θ'4. It is treated appropriately and transported and dumped at a predetermined location, while the separated wastewater passes through the drain pipe and returns to the oil/water separation tank 07).
be guided by. Note that the muddy water at the bottom of the sludge separator θυ passes through the muddy water pipe 641 again to the compartment chamber &1 of the oil-water separator 0'I).
).

In this way, car wash wastewater is automatically treated to meet sewer discharge standards and is discharged into the sewer.

Since the car wash wastewater treatment system according to the present invention has the above-described configuration, it can consistently remove dust, sand, mud, and oil from a large amount of wastewater in large-scale car washes and washing facilities. This system automatically discharges wastewater into the sewer system as high-quality wastewater that complies with the sewerage discharge standards regulated by law, making a significant contribution to pollution prevention and environmental conservation. This has the effect of making it possible to construct equipment economically.

[Brief explanation of the drawing]

The drawings are schematic explanatory diagrams showing one embodiment of the present invention.
・Drainage storage tank, (4)... scraping machine, (6)... first dust remover, (9) to (to)... water supply pipe, 04)... second
Dust remover, OS C11) (ff...pump, OQ
...Drainage pipe, θη...Oil-water separator, 0 scoop) Kan B"
J 31) θ...Drain pipe, 01...Intermediate weir, α
) (2])... Compartment room, (a) - (b)... Fresh water supply pipe, (c)... Oil drain pipe, (b)... Oil drain pipe, (g) (b)... Sludge removal Pump, 弼~01... Sludge drainage pipe,
01)...Sludge separator.

Claims (1)

[Claims] Drainage from drains installed at car washes, etc. is led to a wastewater storage tank, and garbage is collected in a designated place by a raking machine and removed by a first dust remover, and drainage inside the storage tank is removed by a second dust remover. The floating oil water in the oil water separation tank is removed by an oil skimmer, and the middle layer waste water is pumped out and discharged into the sewer, and the sludge in the bottom layer of the oil water separation tank is separated by a sludge pump. This is a car wash wastewater treatment system that is configured to lead the wastewater to a machine and separate it from wastewater, and to return the separated wastewater to the oil-water separator.