JPS5969189A - Waste water reutilizing device of car washing machine - Google Patents

Abstract

PURPOSE:To reutilize waste water of a car washing machine, by collecting waste water after washing a car, in a pit, sucking it up to a waste water purifying device, and separating and removing impurities such as a detergent, wax, etc. mixed in waste water, in the device. CONSTITUTION:A titled device is constituted of a P it P for collecting waste water being under the installation face of a car washing machine Wc , a waste water purifying device C for sucking up waste water in the pit P and separating and removing impurities, and a clean water tank T for collecting clean water from the device C. The purifying device C consists of an electrolytic cell 18 for separat ing primarily impurities a jet device S for mixing air in waste water from the lower part and jetting it to said cell, a separating chamber 28 for separating secondarily waste water overflowing from the electrolytic cell 18, an impurity receiving tank 31 being adjacent to said chamber, an impurity guide plate 61, a jet nozzle 62 for forming a jet water flow going toward said plate and extruding impurities (a) of the separating chamber 28 to the impurity receiving tank 31, and a filtration chamber 16 for filtering waste water from the separating chamber 28.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a car wash waste water reuse device that purifies and reuses waste water after washing in a car wash machine.

In general, car wash machines use a large amount of water to wash the car body, which is not only uneconomical, but also inconvenient in that the car cannot be washed during periods of water shortage, such as in the summer.

Therefore, methods have been considered to pool the wastewater after washing and reuse it, but since recent car washes wax the car body at the same time as washing the car, the wastewater contains not only detergent. Wax is mixed in, and in order to use this wastewater, it is necessary to separate and remove the detergent and wax.

In view of the above, the present invention makes it possible to easily remove detergents, wax, and other impurities from wastewater and reuse it as washing water.The present invention enables not only car wash machines that do not apply wax but also car wash machines that apply wax to use the waste water after car washing. The main object of the present invention is to provide a waste water reusing device for a car wash machine that is easy to construct and can be reused.

An embodiment of the present invention will be described below with reference to the drawings.

A pit P is constructed below the installation surface on which a conventionally known mobile car wash Wc is installed to collect and store used waste water used in the car wash. A wastewater purification device C for purifying the wastewater and a clean water tank 7' for storing the clean water purified by the wastewater purification device C are installed. Further, a fresh water inlet 1 is opened in the clean water tank T, and fresh water can be replenished from this water inlet. A car wash pump 2 is housed in the clean water tank 1, and a washing water supply pipe 3 connected to the discharge port of the car wash pump 2 is connected to a washing water jet pipe 4 of the mobile car wash machine WC, and the washing water supply pipe 3 is connected to the washing water jet pipe 4 of the mobile car wash machine WC. By driving the pump 2, the washing water is forced into the washing water spouting pipe 4, and the washing water is spouted from a spout provided there, so that it can be used for car washing.

The inside of the pit T is divided by a partition wall 5 into a waste water storage chamber 6 and a drainage chamber 7. Furthermore, the inside of the wastewater storage chamber 6 is filtered by a -order filter 8 into the first chamber 6. and a second chamber 62, and a secondary filter 9 is provided in the first chamber 61. A suction pipe 10 connected to the suction port of a raw water pump 11, which will be described in detail later, is connected to the secondary filter 9, and the wastewater in the pit T is filtered through primary and secondary filters 8.9.
After passing through the water, the raw water is sucked up by the raw water pump 11.

Ki ■ Room 6. The upper surface of the opening is covered with a mesh-like cover plate 12, onto which the car wash machine IVc can be inserted.

Next, the configuration of the wastewater purification apparatus C will be explained with reference mainly to FIGS. 2 to 4.

The interior of the septic tank 13 is divided into an electrolytic purification chamber 15 and a filtration chamber 16 by a partition wall 14 . In the upper part of the electrolytic purification chamber 15,
An electrolytic cell 18 made of an insulating material such as vinyl chloride resin is provided, and within this electrolytic cell 18, a large number of anode plates 19□ and cathode plates 19□ are arranged alternately in parallel at appropriate intervals. An electrolytic electrode plate group 19 configured as shown in FIG. An aluminum plate is used as the anode plate 191, and an aluminum plate or a stainless steel plate is used as the cathode plate 19□. The upper surface of the electrolytic cell 18 is open, and an eruption chamber 20 for unpurified wastewater that communicates with the electrolytic cell 18 is formed on the lower surface thereof. Ru. In the AfJ injection chamber 20, a waste water injection device S is provided so as to be biased toward 1t111 (to the right in FIG. 3) with respect to the vertical center line LL of the electrolytic cell 18. This device S
has a spout back 22 arranged approximately horizontally, and the spout pipe 22
A large number of spout ports 23 are opened toward the inside of the electrolytic cell 18 .

The upper end of a water pipe 24 is connected to the middle part of the spout pipe 22, and the lower end of this water pipe 24 is connected to the discharge port of the raw water pump 11, which is a check valve material installed below the electrolytic cell 18. ing. The raw water pump 11 has an on-off valve 2 for draining water.
6 is attached. The suction pipe 1o is connected to the suction port of the raw water pump 11, and the other end of the suction pipe 10 is opened into the second chamber 62 in the pinto P. An ejector 25 is interposed in the middle of the water pipe 24, and an air introduction pipe 2γ that opens to the atmosphere is connected to the ejector 25. Therefore, when the raw water pump 11 is driven, the second chamber 6
The waste water inside the pipe 2 is sucked up and sent under pressure to the water pipe 24,
At this time, due to the action of the ejector 250, atmospheric air is sucked into the water pipe 24 through the air introduction pipe 27 and mixed into the waste water, and is ejected from the water fountain 23 of the spout pipe 22 together with the waste water in the form of bubbles. .

In the septic tank 13, a separation chamber 28 with an open top is formed adjacent to one side of the electrolytic tank 18 (left side in FIG. 3),
The separation chamber 28 and the electrolytic cell 18 are separated by a partition wall 29 formed by one side wall of the electrolytic cell 18. A weir 30 is formed at the upper end of the partition wall 29, and a part of the waste water and the aggregated impurities a in the electrolytic cell 18 flow into the separation chamber 28 through this weir 30. Also, the separation chamber 28
An impurity receiving tank 31 for storing impurities is arranged adjacent to the inner upper part and having an open top surface.
An impurity guide plate 61 is provided at the upper edge of the partition wall 60 between the impurity receiving tank 31 and the separation chamber 28 . The impurity guide plate 61 is inclined downward from the partition wall 60 toward the separation chamber 28, so that the impurity guide plate 61 is submerged in water while the apparatus is in operation. A jet nozzle 62 with a spout located approximately 5 mm above the water surface is disposed above the electrolytic cell 18, and the nozzle 62 jets out a small amount of water to form a jet water flow toward the impurity guide plate 61. , the floating impurities a on the separation chamber 28 are pushed out into the impurity receiving tank 31. The ejection nozzle 62 is connected to the water pipe 24 upstream of the ejector 25 via a water pipe 63.

A discharge pipe 32 is connected to the bottom wall of the impurity receiving tank 31 .

The bottom wall 13cL of the septic tank 13 is formed into a funnel shape, and another discharge pipe 33 is connected to its lower end, and an on-off valve 33' is provided at the end of this discharge pipe 33.

As clearly shown in FIG.
4, an inlet 35 is opened in the overflow tank 34, and the upper end of a waste water pipe 36 is connected to the inlet 35. The waste water pipe 36 extends downward within the separation chamber 28, and its lower end opens into the lower portion of the chamber 28.

As shown in FIG. 2.4, on three sides of the overflow tank 34, on the upper edge of the partition wall 14, there is a rectification guide plate 38 extending over the peak electrolytic tank 18 of the weir 3o and the Ll passage chamber 16. established,
This rectifying guide plate 38 is tilted slightly toward the electrolytic cell 18 so that water in the upper part of the filtration chamber 16 can flow back into the electrolytic cell 18 through the reverse flow path 37.

A granular 1C material 39 is placed in the lower part of the above-mentioned j.
The core material 39 has three layers, an upper layer, an intermediate layer, and a lower layer.The upper layer and the lower layer are made of a coarse filter medium, and the middle layer is made of a denser filter medium.

An air jet pipe 4o having a large number of blowholes is inserted into the upper and lower intermediate parts of the filter medium 39.
is connected to a pressurized air source 41 such as an accumulator via an on-off valve 42, and can blow out pressurized air into the filter medium 39 according to the safety (*τ). 43 is opened, one end of a water conduit 44 is connected to this outflow 43, and the other end of this water conduit 44 is opened into the clean water tank I marked A?+. , a backflow water pipe 45 is connected, and a three-way opening/closing valve 46 is provided at the three-pronged connection part.The backflow water pipe 45 is connected to the check valve 4.
It is connected to the washing water supply pipe 3 via 7. Water pipe 4
An on-off valve 51 for draining water (Ji closing valve 48 and supplying washing water 'fi'3 on the downstream side of the backflow water pipe 45) is interposed at the lower part of the pipe 4. A drain pipe 49 is provided between the upper part of the groove member 39 of the filtration chamber 16 and the drain chamber 7, and a cylinder valve 50 is interposed in the middle of the drain pipe 49. In addition, in the drain pipe 49 downstream of the cylinder valve 50,
A discharge pipe 32 communicating with the impurity receiving tank 31 is connected.

In the figure, 52 is a control panel, and 53 is a viewing window.

Next, the operation of the embodiment of the present invention will be explained.

■ Due to the operation of the car wash machine 117C, a large amount of wastewater containing detergent and water-based wax is collected through the nosonyu-shaped cover plate 12) and the wastewater in the pit I (1'1) is transferred to the distillation chamber 6.
The stored wastewater passes through the primary and secondary filters 8.9 to remove coarse substances and dust, and then passes through the suction pipe 10 and is pumped by the raw water pump 11, which is started at the same time as the car wash Wc starts operating. Get sucked up.

■ The pressurized waste from the raw water bonder 11 is passed through the pipe 24 to the ejection pipe 22 of the waste water injection device S to reach a pressure of 1,
At this time, air is sucked into the water pipe 24 from the ejector 25:C through the air inlet pipe 27, mixed with the pressure-fed water (C), forms air bubbles, and is ejected along with the wastewater toward the electricity tank 18. Ru.

■ As the bubbles rise, the pressurized wastewater rises inside the cleaning tank 18 through the gap between the distorted plate 19° and the cathode plate 192. During this rising process, the detergent mixed in the wastewater ( The anionic surfactant) is attracted to the anode plate 19□, and the aqueous wax (cationic surfactant) mixed in the wastewater is attracted to the cathode plate L92, and the aluminum hydroxide generated from the aluminum electrode plate, The detergent and wax coagulate together with other impurities, and the coagulated impurity a floats to the water surface with the rise of air bubbles in the wastewater, while the heavy impurities fall below the electrolytic cell 18 D 2
1 and settles under the septic tank 13.

(2) Detergents, wax, and other aggregated impurities (a) that have surfaced on the water surface of the electrolytic cell 18 are mixed with air bubbles and are carried by the upward flow in the electrolytic cell 18 together with the waste water in the upper layer of the cell 18 into the first.
It is pushed to the left in FIG. 3, overcomes the weir 30, and flows into the separation chamber 28. In the separation chamber 28 , the flocculated impurities floating on the waste water and the flocculated impurities a that cannot float in the electrolytic cell 18 but are secondarily separated and floated in the separation chamber 28 are transferred to the impurity receiving tank 31 by the jet water flow formed by the jet nozzle 62 . From the 1ii31, it flows through the discharge pipe 32 and the drain pipe 49 to the drainage chamber 7 in the focus P, and from there it is discarded via an oil-water separation tank (not shown), etc.

(2) Impurities heavier than the waste water are gradually precipitated in the separation chamber 28, and these precipitated impurities are discharged to the outside by opening the on-off valve 33'. As clearly shown in FIG.
Since it is arranged on the side away from the separation chamber 28 with -J- as the boundary (+111 on the right in Figure 3), the flow of wastewater in the electrolytic cell 18 becomes a unidirectional flow toward the separation chamber 2B, and the unidirectional flow causes Impurities on the electrolytic cell 18 can be efficiently pushed out toward the separation chamber 28.

■ The wastewater whose impurities have been separated as described above in the separation chamber 28 gradually descends, ascends the wastewater pipe 36 that opens at the bottom of the separation chamber 28, flows into the overflow tank 34, and overflows the nuclide 34. It flows down into the filtration chamber 16.

■ The wastewater in the filtration chamber 16 passes downward through the filter medium 39, and finally fine contaminants are separated and removed, and then flows into the clean water tank T through the water conduit 44 and the three-way on-off valve 46, and is used for car washing. By driving the pump 2, the water is reused as washing water for car washing. .

As wastewater purification continues as described above, the filtration chamber 1
The filter medium 39 in the filter 6 becomes clogged. In such a case, the clogging will be automatically removed by the following action.

■ After closing the on-off valve 51 and switching the three-way on-off valve 46,
The cylinder valve 50 is opened and the water on the filter medium 39 in the filtration chamber 16 is discharged.

■ After draining is finished, close the cylinder valve 5o, then drive the car wash pump 2 to send the washing water in the clean water tank V to the water conduit pipe 44.
At the same time, the on-off valve 42 is opened and the compressed air in the pressure air source 41 is injected into the filter medium 39 through the air jet pipe 40. The filter medium 39 is washed into a floating state by the pressurized rising of the washing ifα water and air. Before the filtration chamber 16 is filled with water, the drive of the car wash pump 2 is stopped to stop the supply of washing water, and the on-off valve 42 is closed to stop the supply of pressurized air.

(◇ Wait for the floating filter medium 39 to sink, open the linter valve 50, and drain the impurity-containing water from the filter chamber 16 through the drain pipe 49.

■ Repeat the operations in Q) and ■ several times.

■ When the drainage is finished, close the cylinder valve 5o and operate the car wash pump 2 again while stopping the air supply to fill the filtration chamber 16.
Only the washing water is pumped into the filter medium 39 to push up the impurities on the α phase 39 upwards, and push out the air remaining in the filter 39 upwards to prepare the filter medium 39. At this time, 71i! When the inside of the filtration chamber 16 is filled with washing water, the washing water overflows the filtration chamber 16 through the reverse flow path 37, is guided by the rectification guide plate 38, and flows into the electrolytic cell 18. Floating impurities remaining without being discharged into the tank are driven into the impurity receiving tank 31 and discharged.

(2) Stop the operation of the car wash pump 2, open the cylinder valve 50, and drain the water remaining on the filter medium 39 through the drain pipe 49.

■ Next, close the cylinder valve 50.

■Finally, open the on-off valve 51 and switch based on the three-way on-off valve 46 to complete the entire work.

Of the above-mentioned operations, steps ω to ① can be automatically performed by an electric controller in the control panel 52. .

As described above, according to the present invention, the waste water after car washing is
This stored wastewater is sucked up into wastewater purification equipment C,
In the Rc, impurities such as detergent and wax mixed in the wastewater are separated and removed to produce clean water, which can be used as washing water for car washing. Of course, when washing and waxing the car body, it is possible to reuse the water once, making it possible to wash the car economically, and it is also convenient during times of water shortage.
I can also wash my car without any problems.

In addition, in the wastewater purification device, air is mixed into the wastewater and the foamy wastewater is injected into the electrolytic cell, so detergent, wax, and other impurities in the electrolytic cell are temporarily separated.
Furthermore, secondary separation treatment of the impurities in the emitted water can be performed in the pre-separation chamber, so impurities can be efficiently and accurately separated from the wastewater, and the wastewater from which the impurities have been separated can be Finally, in the filtration chamber, a small amount of iu
1, dust, etc. are removed, so the wastewater from the wastewater purification device C is purified to the same degree as fresh water and poses no problems (it can be reused as washing water for car washes).

Furthermore, impurities on the water surface of the separation chamber can be efficiently pushed out to the impurity receiving tank by the jet water flow formed by the jet nozzle. In this case, the impurities surrounding the jetted water stream are also pushed out while being drawn into the water stream, so that the impurity extrusion effect can be exerted over a wide range of the water surface of the separation chamber. At the same time, a small amount of water on the upper surface of the impurity guide plate is pushed out toward the impurity receiving tank, so that impurities that exist just below the water surface and cannot float above the water surface due to insufficient buoyancy are guided along with the water to the impurity guide plate and into the impurity receiving tank. is extruded. Furthermore, since the jetted water flow can collapse the air bubbles contained in the impurities, the volume of the impurities can be reduced, and a small amount of water is pushed out together with the impurities into the impurity receiving tank and flows through the discharge pipe connected to it. The discharge pipe will not get clogged.

[Brief explanation of the drawing]

Fig. 1 is an overall schematic side view of the device of the present invention, Fig. 2 is a cross-sectional side view of the waste water purification device, Fig. 3 is a front cross-sectional view of the main part of the device, and Fig. 4 is a cross-sectional side view of the waste water purification device. FIG. 2 is a sectional view taken along line +V-+V. C... Wastewater purification device, P... Pit, 7... Clean water tank, 16... Steller's chamber, 18... Electrolytic cell, 28...
- Separation chamber, 31... Impurity receiving tank, 60... Partition wall,
61... Impurity guide plate, 62... Spray nozzle patent applicant Takeuchi Iron Works Co., Ltd.

Claims (1)

[Claims] This is a car wash waste water recycling device that purifies and reuses waste water containing detergent, wax, and other impurities after washing a car, and is built under the standing surface of the car wash machine (IVc). , a pit (l) for storing the wastewater;
A wastewater purification device (C) that sucks up the wastewater stored in the pit CP> and separates and removes impurities from the wastewater;
The waste water purification device (C) is composed of: a clean water tank (T) for storing clean water from the device (C);
An electrolytic cell (18
); a waste water injection device (S) for injecting waste water into the electrolytic cell (18) from the lower part thereof while mixing air; a separation chamber (28) that receives impurities and wastewater overflowing from the wastewater and performs secondary separation of impurities from the wastewater;
) an impurity receiving tank (31) disposed adjacent to the separation chamber (28); Review (room (2)
8); an impurity guide plate (61) installed so as to be inclined downwardly toward the electrolytic cell (18); a jet nozzle (forming a jet water flow to push out the impurity (a) in the separation chamber (28) toward the impurity receiving tank (31);
62); A wastewater reusing device for a car wash machine, comprising: a wastewater separation chamber (28) and a wastewater separation chamber (16);