JPH10314796A - Vehicle washing water recycling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make compact a device, as a whole, by placing a pump for feeding vehicle washing water to tanks and a pump for delivering purified water purified at the tanks to the outside in one outer case, and to reduce the installation space for the outer case and a vehicle washing water recycling device by arranging the tanks and pumps in series in the outer case to easily install the case and the device in a narrow space in a gas station. SOLUTION: In a longitudinally long rectangular box-shaped outer case 60, there are provided in series a coagulating reaction tank 10 into which vehicle washing water 2 is supplied from the outside, a primary filter tank 20, an active carbon tank 30, a secondary filter tank 40, and a suction pump 50 for feeding vehicle washing water to the tank 10 and a feed water pump 51 for delivering washing water 2' from the tank 40 to the outside. A cylindrical first filter 21 of the tank 20 is back-washed by a washing nozzle 24 provided outside the filter 21. A cylindrical second filter 41 of the tank 40 is back-washed by a washing cylinder provided inside the filter 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car wash water recycling apparatus for purifying discharged car wash water after washing a vehicle such as an automobile or a train and reusing it for washing.

[0002]

2. Description of the Related Art When a single car is washed by a car wash machine installed at a gas station, it is usually 10 minutes per minute.
~ 20 liters of water are used. Water used for car washing (car washing water) contains various kinds of pollutants such as detergents, mud, earth and sand, and oils such as wax as impurities. Flowing such a large amount of car wash water through a river without purification causes river pollution, wastes water resources, and increases the monthly water charge.

Therefore, a car wash water recycling system for purifying and reusing a large amount of car wash water used daily at a gas station or the like has been reviewed, as disclosed in Japanese Patent Application Laid-Open Nos. 62-258718 and 1-59767. Various types of car wash water recycling devices have been put to practical use. This car wash water recycling device is composed of a water collection tank for storing car wash water, a coagulation reaction tank for adding a coagulant to car wash water supplied by a suction pump from the water collection tank to positively coagulate and separate impurities, and to precipitate car wash water. Generally, a plurality of tank facilities having various water purifying functions, such as a filtration tank for filtering with a ceramic filtering material or an oyster shell filtering material, are combined in series.

[0004]

Since the above-mentioned car wash water recycling apparatus has a large number of various tank facilities so that a large amount of car wash water can be purified, the entire apparatus becomes large and requires a large installation space. When installing a new gas station at an existing gas station, it is difficult to select an installation location. There is also a small car wash water recycling device that has reduced the installation space by downsizing the various tank facilities described above and unitizing them as a whole, but by reducing the size of the various tank facilities, However, there is a problem that the water purification capability of the apparatus is deteriorated and the water purification function of the entire apparatus is deteriorated.

An object of the present invention is to provide a washing water recycling apparatus in which the entire apparatus is made compact and small without lowering the water purification function.

[0006]

Technical means for achieving the above object of the present invention are a coagulation reaction tank having a car wash water introduction section and a coagulant introduction section, and a coagulation reaction tank for washing a vehicle from outside by washing the vehicle. A primary filter tank for filtering car wash water from the coagulation reaction tank with a first filter, an activated carbon tank for filtering car wash water from the primary filter tank with activated carbon,
A second filter tank that filters car wash water from the activated carbon tank with a second filter to purify water and a water supply pump that supplies purified water from the secondary filter tank to the outside are housed in one outer case.

[0007] Here, some of the impurities contained in the car wash water supplied from the outside to the coagulation reaction tank are coagulated by the addition of the coagulant and settle at the bottom of the coagulation reaction tank, forming a drain at an appropriate time. Is discharged. The car wash water purified in the first stage in the coagulation reaction tank moves to the primary filter tank in an overflow manner, and is purified in the second stage by passing through the first filter. It flows into an activated carbon tank and is purified by activated carbon in a third stage. By passing the car wash water that has been filtered and purified in two stages in the flocculation reaction tank and the primary filter tank through the activated carbon in the activated carbon tank, clogging of the activated carbon is suppressed, and the life of the activated carbon is prolonged. The car wash water is purified to the extent that there is almost no problem by the third-stage filtration using the activated carbon, and moves to the secondary filter tank. The second filter of the secondary filter tank is of such a size as to filter activated carbon particles from the car wash water purified by the activated carbon, and the car wash water that has passed through the second filter is finally purified and is externalized by the water supply pump. Water is supplied and reused for car washing. When each tank such as the agglutination reaction tank and two pumps are housed in one outer case,
The tank facilities can be connected and integrated and housed in an outer case, and a pump can be arranged in a vacant space in the outer case. By housing in this manner, the entire apparatus can be made compact and compact.

Further, in the present invention, the primary filter tank includes a cylindrical first filter made of a porous metal installed vertically in the axial direction, a motor for rotating the first filter about its axis, and a second filter. A configuration in which a washing nozzle for appropriately ejecting washing water is provided on the outer periphery of the first filter, and car washing water is supplied from the coagulation reaction tank into the first filter while rotating the first filter, and the washing water in the first filter is removed. First in centrifugal separation
Filtering is performed by passing through the filter, and washing water is spouted from the washing nozzle toward the outer periphery of the first filter while rotating the first filter when necessary, to backwash impurities adhering to the inside of the first filter, thereby performing first washing. It is desirable to discharge from the lower end opening of the filter in order to reduce the size of the primary filter tank and enhance the water purification function.

Further, in the present invention, the secondary filter tank includes a cylindrical second filter made of a porous metal fixed vertically in the car wash water from the activated carbon tank, and an inner periphery of the second filter. A structure is provided with a cylindrical cleaning cylinder made of a porous metal provided in the second filter while maintaining a certain gap with the surface, and the water is purified by passing car wash water from the outside to the inside of the second filter. Sometimes, the washing water is supplied into the washing cylinder and the second filter is passed from the washing cylinder to backwash impurities adhering to the outside of the second filter. It is desirable to enhance the purification function.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to FIGS. FIG. 1 (A), (B)
The car wash water recycling apparatus 1 shown in FIG. 1 includes a coagulation reaction tank 10 and a primary filter tank 2 in a vertically long rectangular outer case 60.
0, a structure in which the tank facilities of the activated carbon tank 30 and the secondary filter tank 40, the suction pump 50 and the water supply pump 51 are compactly housed. FIG. 2 schematically shows a case where the car wash water recycling apparatus 1 of FIG. 1 is installed on a gas station, for example, and is installed on an existing water collecting tank 71 formed on the floor 70 of the gas station and on the floor 70. Water tank 7
The car wash water recycling device 1 is installed on the floor 70 between the two.

The water collecting tank 71 accommodates car wash water 2 from a car wash machine (not shown). The car wash water recycling apparatus 1 pumps up the car wash water 2 via a suction pipe 73 to purify the purified water 2 ′. Water is supplied to the water storage tank 72 via the water supply pipe 74. The purified water 2 ′ stored in the water storage tank 72 is pumped up by a water supply pump 75 and supplied to a car washer from a water supply pipe 76 to be reused for car washing, or a washing machine, a flush toilet,
Water is supplied to sprinklers, etc. Tap water is supplied to the water storage tank 72 from a tap water supply pipe 77 as needed. This tap water replenishment is automatically controlled using a float switch 78 and a tap water solenoid valve 79.

When the car wash water 2 is continuously purified by the car wash water recycling apparatus 1 and is continuously reused only for the car wash, the installation of the water storage tank 72 shown in FIG. The water supply pipe 74 of the recycling device 1 may be directly connected to the car washer.

The outer case 60 of the car washing water recycling apparatus 1
Is a rectangular box having a front opening, and a pair of doors 61 and 62 which open in a double-open manner as shown in FIG.
The secondary filter tank 40 is installed at the lowest level in the outer case 60, and the activated carbon tank 30 is installed in the secondary filter tank 40. The primary filter tank 20 is provided directly above the activated carbon tank 30, and the agglutination reaction tank 10 is provided beside the primary filter tank 20. In addition, a suction pump 50 and a water supply pump 51 are installed in parallel in an upper empty space in the outer case 60, and a control panel 52 and an interior light 53 are installed beside the suction pump 50 and the water supply pump 51. The appearance of the exterior case 60 which accommodates such tank facilities and is closed by the doors 61 and 62 can be made clean and good. In addition, the car wash water recycling device 1 has a vertically long rectangular shape.
Since the outer case 60 is made compact, the installation space for the car wash water recycling apparatus 1 can be small, and it can be installed in a narrow place of a gas station.

The coagulation reaction tank 10 has a car wash water introduction section 1
1 and a coagulant charging section 12, and a partition plate 13 and a submersible pump 14 therein. Suction pump 5 in car wash water inlet 11
From 0, the car wash water 2 in the water collecting tank 71 is supplied and stored in the coagulation reaction tank 10. A flocculant box 15 is provided on the flocculant charging section 12, and a fixed amount of the flocculant is charged from the flocculant box 15 into the flocculation reaction tank 10 at regular intervals, for example, once every 40 seconds. As shown in FIG. 3, the car wash water 2 supplied into the coagulation reaction tank 10 flows down to one side area of the partition plate 13, passes below the partition plate 13, and rises as it is on the opposite side area of the partition plate 13. Then, it flows from the overflow pipe 16 to the primary filter tank 20. The coagulant is added to the car wash water 2 flowing in the coagulation reaction tank 10 to coagulate and precipitate impurities. Drain is generated by the impurities precipitated at the bottom of the coagulation reaction tank 10, and when this drain accumulates to some extent, FIG.
The submersible pump 14 is operated to be discharged from the drain pipe 17 to the outside. Car wash water 2 purified in coagulation reaction tank 10
Overflows the overflow pipe 16 and naturally flows down to the primary filter tank 20.

In the primary filter tank 20, the car wash water 2 from the coagulation reaction tank 10 is filtered by the first filter 21 made of a porous metal and flows down naturally into the activated carbon tank 30. First filter 21
May be a filter using a non-woven fabric other than the porous metal. FIG. 4 shows a specific example of the primary filter tank 20.
Explaining based on (A) and (B), this primary filter tank 20 rotates a cylindrical first filter 21 of a porous metal installed vertically in the axial direction, and rotates the first filter 21 about its axis. Motor 22 and, if necessary, first filter 2
A cleaning nozzle 24 for ejecting cleaning water 2 ″ is provided on the outer periphery of the first filter tank 21. The lower part of the first filter 21 is rotatably supported by a bearing 25 at the bottom of the primary filter tank 20 and communicates with a drain pipe 26. The drain pipe 26 is an automatic open / close valve (not shown).
And is led out to the outside across the activated carbon tank 30. The car wash water 2 is supplied to the upper end opening of the first filter 21 from the overflow pipe 16, the car wash water 2 is stored in the first filter 21, and impurities pass while the car wash water 2 passes through the fine eyes of the first filter 21. Filtered.

As shown in FIG. 4A, the first filter 2
1 at constant speed by the motor 22 (for example, 300 to 350 times / minute)
Agglutination reaction tank 10 in first filter 21 while rotating
, The car wash water 2 is centrifugally filtered by the first filter 21. At this time, the drain pipe 26 is set in a closed state, and all the car wash water 2 supplied into the first filter 21 is filtered through the first filter 21 and is directly installed at the bottom of the primary filter tank 20. The water naturally flows down to the activated carbon tank 30 through the communication pipe 27. When impurities accumulate on the inner surface of the first filter 21 and the filtration function is reduced, as shown in FIG.
Backwashing of the first filter 21 is performed.

A plurality of cleaning nozzles 24 are arranged vertically in a row toward the outer peripheral surface of the first filter 21.
During the continuous operation of the filter 21, the washing water 2 ″ is jetted periodically or when necessary. For example, every time the coagulant is fed into the coagulation reaction tank 10 five times, the washing water 24 ″ is ejected from the washing nozzle 24. Is spouted for only 20 seconds. During this time, the rotation speed of the first filter 21 is reduced to half or less of the normal state, and the drain tube 26 is opened. The cleaning water 2 ″ spouted from the cleaning nozzle 24 flows at a high speed from the outer surface to the inner surface of the first filter 21 to wash away impurities on the inner surface of the first filter 21, and the washed-out impurities become drain and drain. Discharged from tube 26.

Such backwashing of the first filter 21 may be performed every time the water level of the car wash water 2 in the first filter 21 exceeds a certain level. That is, since the water level in the first filter 21 rises as the first filter 21 becomes clogged, when the water level rises to a preset level, this is detected by a float or the like, and the water level shown in FIG. Perform backwash in the same way. The backwashing of the first filter 21 may be performed by both the control method based on the water level and the periodic control method.

As described above, the car wash water 2 is filtered by the first filter 21.
Is filtered by a centrifugal separation method, and the primary filter tank 20 in which the first filter 21 is back-washed by the washing nozzle 24 when necessary can stably obtain an advanced water purification function even with a small size, and This advanced water purification function can be continuously maintained for a long period of time, so that long-term continuous purification of car wash water can be performed. In addition, the size reduction of the primary filter tank 20 facilitates the size reduction and the size reduction of the entire car wash water recycling apparatus.

The activated carbon tank 30 installed directly below the primary filter tank 20 is a bag having a mesh 32 at the bottom as shown in FIG. The activated carbon tank 30 is installed in a state where it is immersed in the car wash water 2 in the secondary filter tank 40, and the car wash water 2 flowing down from the primary filter tank 20 is filtered while passing through the activated carbon 31, and the mesh 32 Out of the secondary filter tank 40. The activated carbon 31 adsorbs most of the impurities in the car wash water 2 and purifies the car wash water 2 to almost 100%. Activated carbon tank 30 to 2
The car wash water 2 sent to the next filter tank 40 is almost similar to purified water but may contain fine particles of activated carbon 31.
To remove this, a secondary filter tank 40 is installed.

The secondary filter tank 40 is provided with a second filter 4 made of a porous metal having a fine mesh size capable of filtering particles of the activated carbon 31.
1, a specific example of which will be described with reference to FIGS. 5 (A) and 5 (B). The second filter 41 may be a filter using a non-woven fabric other than the porous metal, for example. The secondary filter tank 40 has a cylindrical second filter 41 made of a porous metal fixed in the axial direction in the purified car wash water 2 from the activated carbon tank 30, and is fixed to the inner peripheral surface of the second filter 41. Is provided in the second filter 41 while maintaining the gap g. A purified water supply pipe 43 is installed through the center of the washing cylinder 42, and a washing water supply pipe 44 is installed above the washing cylinder 42.

The car wash water 2 flowing into the secondary filter tank 40 from the activated carbon tank 30 passes from the outside to the inside of the second filter 41 as shown in FIG. The purified water 2 ′ is supplied from the purified water supply pipe 43 to the water supply pump 51.
And water is supplied to the outside. When the car wash water 2 passes through the second filter 41 and the activated carbon particles adhere to the outer surface of the second filter 41 to cause clogging, as shown in FIG. The high-pressure washing water 2 ″ is supplied from the water supply pipe 44 and jetted from the outer peripheral surface of the washing cylinder 42. Thereby, the washing water 2 ″ jetted from the washing cylinder 42 is spouted from the inner surface of the second filter 41 to the outer surface. Then, the activated carbon particles and the like on the outer surface of the second filter are washed off. Such a backwash of the second filter 41 is performed by a control method similar to the control method of the backwash of the first filter 21.

In the secondary filter tank 40 described above, even if the second filter 41 is fixed, an advanced water purification function can be stably obtained for a long time.
Is fixed, the structure of the secondary filter tank 40 can be made simple, and the whole car washing water recycling apparatus can be easily reduced in size and size.

As in the above embodiment, the coagulation reaction tank 10
By installing the activated carbon tank 30 at a stage subsequent to the primary filter tank 20, the life of the activated carbon 31 in the activated carbon tank 30 is extended.
That is, suppose that the first stage of the agglutination reaction tank 10 or the primary filter tank 20
When the activated carbon tank 30 is installed in the preceding stage, the activated carbon 31 filters the car wash water having a higher degree of contamination, and the activated carbon 3
1 is clogged earlier, and the water purification function is reduced at an early stage.
However, the car wash water 2 that has been filtered and purified in two stages in the flocculation reaction tank 10 and the primary filter tank 20 is supplied to the activated carbon tank 30.
, The clogging of the activated carbon 31 is suppressed, and the life of the activated carbon 31 is extended. This activated carbon 31
Is a consumable and is replaced with a new one when it is determined that the service life has expired. However, as described above, the service life can be reduced and the replacement frequency can be reduced, which is economical.

Further, by installing the secondary filter tank 40 at the subsequent stage of the activated carbon tank 30, the purified water 2 'supplied to the outside eliminates activated carbon particles and the like. That is, if purified water is directly supplied to the outside from the activated carbon tank 30, activated carbon particles may be mixed into the purified water. If such purified water is reused in a car wash, the vehicle is damaged by the activated carbon particles mixed therein, When reused in a washing machine, troubles such as activated carbon particles adhering to the laundry may occur. Therefore, if the car wash water 2 from the activated carbon tank 30 is passed through the secondary filter tank 40 to obtain purified water 2 'from which the activated carbon particles have been removed, the above troubles are eliminated, and a highly reliable car wash water recycling apparatus is provided. Is achieved.

[0026]

According to the car washing water recycling apparatus of the first aspect, the coagulation reaction tank, the primary filter tank, the activated carbon tank, and the
Each tank equipment of the next filter tank, a pump for supplying car wash water to each tank equipment, and a pump for supplying purified water purified by the tank equipment to the outside are housed in one outer case, thereby reducing the size of the entire apparatus. Therefore, by vertically arranging each tank equipment and pumps in the outer case, it is possible to reduce the entire installation space of the outer case or the car wash water recycling device, and it is easy to install in a narrow place such as a gas station. A small car wash water recycling device can be provided. In addition, by passing the car wash water purified in two stages in the flocculation reaction tank and the primary filter tank through the activated carbon tank, the life of the activated carbon in the activated carbon tank is prolonged, and the frequency of replacement of the activated carbon can be reduced, which is economical. . Further, since the car wash water from the activated carbon tank is purified by passing it through the secondary filter tank, purified water without activated carbon particles can be obtained, and a car wash water recycling device suitable for car washing and washing can be provided.

According to the second aspect of the present invention, the cylindrical first filter of the primary filter tank is backwashed by spraying the washing water from the washing nozzle disposed on the outer periphery of the first filter tank. Along with downsizing of primary filter tank,
It is easy to maintain and control the water purification function to a high degree for a long time, and a highly reliable car wash water recycling device can be provided.

According to the third aspect of the present invention, the car wash water is recycled by passing the car wash water from the outer surface to the inner surface of the cylindrical second filter of the secondary filter tank and filtering it. Since the second filter is backwashed, downsizing of the secondary filter tank and maintenance of the water purification function are facilitated, and a highly reliable car wash water recycling device can be provided.

[Brief description of the drawings]

FIG. 1A is a front view including a partly omitted portion of a car wash water recycling apparatus showing an embodiment of the present invention, and FIG. 1B is a plan view thereof.

FIG. 2 is a front view showing an outline of a car wash water recycling facility using the apparatus shown in FIG.

FIG. 3 is a sectional view of a main part for describing a water purification system of the apparatus in FIG. 1;

4A is an enlarged sectional view of the primary filter tank in the apparatus of FIG. 1 at the time of water purification, and FIG. 4B is an enlarged sectional view of the primary filter tank at the time of backwashing the filter.

5A is an enlarged sectional view of the secondary filter tank in the apparatus of FIG. 1 at the time of water purification, and FIG. 5B is an enlarged sectional view of the secondary filter tank at the time of backwashing the filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Car wash water recycling apparatus 2 Car wash water 2 'Purified water 10 Coagulation reaction tank 11 Car wash water introduction part 12 Coagulant charging part 20 Primary filter tank 21 First filter 24 Cleaning nozzle 30 Activated carbon tank 31 Activated carbon 40 Secondary filter tank 41 Second Filter 42 Washing cylinder

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B01D 24/46 B01D 36/00 33/44 36/02 33/58 37/00 36/00 B60S 3/04 36/02 C02F 1 / 00 L 37/00 1/28 F B60S 3/04 D C02F 1/00 B01D 33/36 1/28

Claims (3)

[Claims] An agglutination reaction tank having a car wash water introduction section and a coagulant introduction section, a suction pump for supplying car wash water for washing a vehicle from outside to the agglutination reaction tank, A primary filter tank for filtering with a filter, an activated carbon tank for filtering car wash water from the primary filter tank with activated carbon, a secondary filter tank for filtering car wash water from the activated carbon tank with a second filter to purify water, A car wash water recycling apparatus characterized in that a water supply pump for supplying purified water from a secondary filter tank to the outside is housed in one outer case. 2. The filter according to claim 1, wherein the primary filter tank includes a cylindrical first filter made of a porous metal, which is installed vertically in the axial direction, a motor that rotates the first filter about its axis, and an outer periphery of the first filter. A washing nozzle for appropriately ejecting washing water is provided, and car washing water is supplied from the coagulation reaction tank into the first filter while rotating the first filter, and the car washing water in the first filter is centrifugally separated from the first filter. The filter is passed and filtered, and when necessary, the washing nozzle is spouted from the washing nozzle to the outer periphery of the first filter while rotating the first filter to backwash impurities adhering to the inside of the first filter, thereby opening the lower end of the first filter. The car wash water recycling device according to claim 1, wherein the water is discharged from the car wash. 3. The secondary filter tank has a porous cylindrical second filter fixed vertically in the car wash water from the activated carbon tank, and a fixed gap between the inner peripheral surface of the second filter. And a cylindrical cleaning cylinder of a porous metal installed in the second filter for purifying the vehicle by passing car wash water from the outside to the inside of the second filter and purifying the washing water when necessary. 3. The cleaning water recycling apparatus according to claim 1, wherein impurities supplied to the outside of the second filter are backwashed by supplying and passing through the second filter from the cleaning cylinder.