JPH0130526B2 - - Google Patents

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 the scale of the car wash facility increases, a large number of cars are washed and cleaned using pressure steam every day.
A large amount of garbage, sand, mud, oil, etc. flows out with the washing water, and in order to discharge this wastewater into the sewer, it is necessary to remove the garbage and oil in the wastewater so that it complies with the sewer discharge standards regulated by law. It is necessary to
The installation of wastewater treatment equipment is essential.

This invention was developed in view of the above-mentioned circumstances.
This was done with the aim of making it possible to efficiently and automatically perform consistent wastewater treatment that can cope with the expansion of the scale of washing facilities, etc.

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 a second dust remover, and the floating oil-water in the oil-water separation tank is removed by an oil skimmer, and the intermediate 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, filthy sand, etc. flow into drainage ditches installed at car washes, etc., mixed with washing water, and some of the garbage and filthy sand reach the bottom of the ditch. accumulate. Therefore, these garbage, sludge, etc. are collected at a predetermined place by a raking machine running in the ditch, and at that place, the garbage is removed by the first dust remover (coarse), while the oily water sludge, etc. is removed by clear water ( industrial water)
The wastewater is washed away and flows into a wastewater storage tank, and fine residual garbage is removed by a second dust remover (fine), and the wastewater is led to an oil-water separation tank where oil is separated and removed by a skimmer. 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 wastewater above the middle layer in the oil-water separation tank complies with 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 drawings, reference numeral 1 denotes a washing area for a car A, 2 a drainage ditch provided on one side of the washing area 1, and 3 a drainage storage tank provided at the end or center of the ditch. Inside the drain 2, there is a raking machine 4 that rakes up trash and sedimented mud and sand.
is provided so as to run along the groove 2, and a dust removal screen 5 is provided at the entrance of the wastewater storage tank 3 in which garbage and the like are accumulated, and a rake type first dust removal device 6 (coarse mesh) is provided. A water pump 8, water supply pipes 9, 10, 11, 1 are installed from the industrial water receiving tank 7 to the front of the washing area 1, drainage ditch 2, and dust removal screen 5.
Washing water is supplied through ports 2 and 13, and on the other hand, although not shown, steam for car washing is supplied.

Reference numeral 14 denotes a second dust remover (detailed item), to which the waste water in the waste water storage tank 3 is supplied via a pump 15 and a drain pipe 16, fine garbage in the waste water is removed here, and the waste water is provided adjacently. The water is led to an oil-water separation tank 17 by a drain pipe 18. The oil/water separation tank 17 is
A chevron-shaped intermediate weir 19 is provided in the center to form two compartments 20 and 21, and the waste water from the second dust remover 14 is discharged above the intermediate weir 19. 22, 23, 24, 2
5 is a clean water supply pipe for cleaning to the second dust remover 14 and the oil/water separation tank 17, and is connected to the water supply pipe 9. Note that the water discharge ends of the fresh water supply pipes 24 and 25 are provided at positions farther than the intermediate weir 19, and the water discharge ends of the fresh water supply pipe 23 are located above the intermediate weir 19.

An electric oil skimmer 26 is disposed above the compartment 21, which is an example of the oil-water separation tank 17, to remove floating oil and the like, and guide it to a processing tank (not shown) through an oil drain pipe 27.

The oil-free drainage from the upper parts of both compartments 20 and 21 of the oil-water separation tank 17 is carried out through drain pipes 28 and 2.
9 to a drainage basin 30, and the lower layer of wastewater is pumped out by pumps 31 and 32, and drained into a drainage pipe 3.
3 and 34 lead to the drainage basin 30, and the wastewater stored in the drainage basin 30 is discharged to the sewer through a drainage pipe 35.

The sand and mud deposited at the bottom of the oil-water separation tank 17 is pumped out by the mud removal pumps 36 and 37 and sent to the mud removal pipes 38 and 37.
39 and 40 to a sludge separator 41, which is then put into a container 42, treated as appropriate, and transported and dumped at a predetermined location.
3 and is led to the oil/water separation tank 17 again. Note that the bottom muddy water of the sludge separator 41 is led to the compartment chamber 21 of the oil-water separation tank 17 through the muddy water pipe again.

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

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, and making it relatively economical. It has effects such as being able to construct equipment.

[Brief explanation of drawings]

The drawings are schematic explanatory diagrams showing one embodiment of the present invention. 1... Car wash area, 2... Drainage ditch, 3... Drainage storage tank, 4... Scraping machine, 6... First dust remover, 9-13
... Water supply pipe, 14 ... Second dust remover, 15, 31,
32... Pump, 16... Drain pipe, 17... Oil/water separation tank, 18, 28, 29, 33, 34, 35,
43...Drain pipe, 19...Intermediate weir, 20,21...
... Compartment room, 22-25 ... Fresh water supply pipe, 26 ...
Oil skimmer, 27... Oil drain pipe, 36, 37...
...Sludge pump, 38-40...Sludge pipe, 41...
Sludge separator.

Claims (1)

[Claims] 1. Drainage from a drain 2 installed in a car wash 1 etc. is led to a wastewater storage tank 3, and garbage is collected at a predetermined place by a scraper 4 and removed by a first dust remover 6.
The wastewater in the storage tank 3 is led to the oil-water separation tank 17 via the second dust remover 14, and the floating oil-water in the oil-water separation tank 17 is removed by the oil skimmer 26, and the intermediate layer wastewater of the tank 17 is removed by the pump 31, The sludge in the bottom layer in the oil-water separation tank 17 is led to the sludge separator 41 by the sludge pumps 36 and 37 to be separated from waste water, and the separated waste water is returned to the oil-water separation tank 17 and drained. Groove 2, drainage tank 3,
Cleaning water is supplied to the front of the dust removal screen 5, etc.
This car wash wastewater treatment system is configured so that fresh water for washing can be discharged into the second dust remover 14 and the oil/water separation tank 17 via supply pipes 22 to 25.