JPH11300363A - Cleaning device of contaminated water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently remove oil, wax or the like mixed in a sewage by cleaning contaminated water by a coagulating means in a purifying tank, reserving water in a reservoir tank for cleaned water, sending a part of the cleaned water reserved in a reservoir tank to a cleaning tank, and discharging contaminants floating on the upper part of the purifying tank. SOLUTION: Contaminated water 2 in a sewage reservoir tank 1 is supplied to a cleaning tank 4, and electrodes 5, and 6 of a coagulating means 7 are energized to initiate coagulation. By coagulation, for example, aluminum ion is ionized from the aluminum electrode plate, and a minute suspended material in the contaminated water is aggregated on the ionized aluminum ion by coagulating force and form a floc to float. Thereby, when the transparency of the water in the cleaning tank 4 reaches a specified level, specified conditions are satisfied, and a part of cleaned water in the cleaned water reservoir tank 13 is partly supplied to a cleaning tank 4. Thereby, the floc floating on the upper part of the cleaning tank 4 is drained through a discharge port 10, to clean the contaminated water in the cleaning tank 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polluted water purifying apparatus for purifying and reusing polluted water and rainwater generated by watering and car washing at a gas station, an automobile factory, and the like.

[0002]

2. Description of the Related Art Polluted water generated by sprinkling water at a gas station or washing a car is usually drained as sewage.
No. 108684 discloses that wastewater and rainwater generated by a car wash are filtered by a filter 18 and a part of the water filtered by the filter is supplied to an ozone generator 36 to generate ozone in the water. Describes that a detergent dissolved in sewage is oxidized and sterilized, thereby purifying sewage.

[0003] On the other hand, in the above configuration, although the detergent dissolved in the sewage is decomposed and purified by the ozone, oil, wax, sludge and the like mixed into the sewage by the car washing are not treated at all, and the car washing effect is reduced. It is a cause of reduction.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to efficiently remove oil, wax, sludge and the like mixed in sewage generated by a car wash and the like, and to further improve the car wash ability. It is.

[0005]

According to the first aspect of the present invention, there is provided a sewage storage means for storing polluted water, a purifying means for purifying the polluted water by a coagulating means, and a purified water for storing the purified water purified by the purifying means. A water storage means, a sewage water supply means for transmitting the polluted water stored in the purified water storage means to the purification means, and a part of the purified water stored in the purified water storage means to the purification means, and an upper part of the water storage of the purification means. Feedback means for discharging the floating contaminants.

According to a second aspect of the present invention, the purifying means according to the first aspect is provided with a water storage means for storing polluted water, a coagulation means, a water level adjusting means for adjusting the water level of the water storage means, and an upper part of the water storage means. It consists of a discharging means for discharging the floating contaminants.

According to a third aspect of the present invention, the aggregating means according to the second aspect is provided by using an electrolytic device using one of aluminum or an aluminum alloy for the one electrode and one of an aluminum alloy, stainless steel, or titanium for the other electrode. It is composed.

According to a fourth aspect of the present invention, a filter is provided in the drain passage of the discharging means according to the second or third aspect.

According to a fifth aspect of the present invention, the purifying means according to the second to fourth aspects is provided with an adding means for adding a flocculant.

According to a sixth aspect of the present invention, a plurality of the purifying means and / or the purified water storing means according to the first to sixth aspects are provided in parallel.

According to a seventh aspect of the present invention, the purifying means and / or the purified water storing means are provided with sterilizing means.

The invention according to claim 8 is characterized in that the sterilizing means is Cu, A
It is made of ore or the like containing a metal such as g or Mg and / or a metal ion.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIG. 1. Reference numeral 1 denotes a sewage tank for storing polluted water 2 such as sewage or rainwater generated by car washing or water sprinkling. The sensor 3 is attached.

Reference numeral 4 denotes a bottomed hollow cylindrical purification tank having an inner bottom provided with an electrode plate 5 made of, for example, aluminum or an aluminum alloy, and an electrode plate 6 made of stainless steel, titanium, iron oxide, or the like. Coagulating means 7 are arranged alternately and opposingly to apply a predetermined DC voltage between these electrode plates to perform electrolysis, and the water level in the tank is detected at at least two positions at an appropriate position on the upper side wall. A plurality of water level sensors 8 and 9 and a discharge port 10 opened at a position slightly higher than the lower water level sensor are provided.

Reference numeral 11 denotes a sewage water supply passage for supplying the sewage water 2 stored in the sewage water storage tank 1 into the purification tank 4, and a sewage water supply pump 12 is provided on the way.

Numeral 13 denotes a purified water storage tank having a hollow cylindrical shape with a bottom.
At the lower side wall, a purified water supply port 14 is opened, and at least a pair of lower water level sensors 15, 16 having different detection positions are mounted at a position slightly higher than the purified water supply port. A water level sensor 17 is mounted.

Reference numeral 18 denotes a water supply channel for supplying purified water in the purification tank 4 to the purified water storage tank 13 or feeding back a part of the purified water stored in the purified water storage tank to the purification tank 4. A main water passage 19, which communicates with a proper position at the bottom of the purification tank 4 and has the other end opened at the top of the water purification tank 13; a water purification pump 20 connected in the middle of the main water passage; The other end is branched from the purification tank 4 of the water channel 19 and the water purification pump 20, and the other end is connected between the purified water storage tank 13 and the water purification pump 20 of the main water channel 19, and a first opening / closing valve 22 is mounted on the way. A first branch pipe 21 and a second on-off valve 23 mounted between the branch of the first branch pipe 21 of the main water passage 19 and the water purification pump 20.
A second branch in which one end is branched from between the second on-off valve and the water purification pump 20 and the other end is communicated to an appropriate bottom portion of the purified water storage tank 13 and a third on-off valve 24 is mounted on the way. A pipe 25, a fourth on-off valve 26 mounted between the other end connection part of the first branch pipe 21 of the main water path 19 and the other end of the main water path 19, and a first branch of the main water path 19 The main water channel 19, the water purification pump, which is mainly composed of a water purification pipe 28 branched from the other end connection portion of the pipe 21 and the water purification pump 20 and having a fifth on-off valve 27 mounted on the way. The feedback means is formed around the first branch pipe 20, the first branch pipe 21, and the second branch pipe 25.

Reference numeral 29 denotes a tap water supply channel, one end of which is connected to the tap water, the other end of which is opened at the upper part of the purified water storage tank 13, and a sixth opening / closing valve 30 is mounted on the way.

Reference numerals 31 and 32 denote sterilizing means mounted at appropriate places in the purification tank 4 and the purified water storage tank 13, for example, silver, copper, zinc oxide, calcium oxide, magnesium oxide, or the like in a water-permeable container (not shown). The ore containing at least one kind of metal and / or metal ion is stored, or a metal ion having a bactericidal action is eluted using, for example, an aggregation electrode using an aluminum plate and a silver plate as electrodes. .

A discharge passage 33 serving as a discharge means is connected to the discharge port 10 of the purification tank 4, and a filter filter 34 in the form of a mesh is attached in the middle of the discharge passage.
It is configured to separate contaminants and water discharged from 3 from water.

Numeral 35 is an adding means for adding a flocculant to the purifying tank 4. For example, a flocculant 37 such as aluminum sulfate or polyaluminum chloride is stored in a tank 36 and supplied to a liquid supply channel 38. The coagulant 37 is added to the water in the purification tank 4 by operating the liquid pump 39 as appropriate.
Is configured to promote aggregation of contaminants by the action of.

The water level sensor 3 detects the water level in the sewage water storage tank 1. If the water level is equal to or higher than a predetermined water level, the sewage water supply pump 12 is operated, and the polluted water 2 in the sewage water storage tank 1 is purified by the purification tank 4. When the water level in the purification tank reaches the water level detected by the water level sensor 8, the water supply is stopped and electricity is supplied between the electrode plates 5,...

By the above-mentioned aggregation, for example, aluminum ions are ionized from the aluminum electrode plate, and fine suspended matter in the contaminated water aggregates and floats as flocs due to the aggregation force of the ionized aluminum ions.

Therefore, for example, the energization time to the aggregating means 7 elapses a predetermined time in consideration of the capacity of the aggregating means, the capacity of the purification tank 4, and the like, or the transparency of the water in the purification tank is detected by a pollution sensor (not shown). When this reaches a predetermined level, the first on-off valve 22 and the third on-off valve 24
Is opened, the second on-off valve 23 and the fourth on-off valve 26 are closed, the water purification pump 20 is operated, and a part of the purified water in the purified water storage tank 13 is supplied to the purified water supply port 14-the second branch pipe 25-the purified water. Water is supplied to the purification tank 4 through the pump 20 for water, the main water passage 19, and the first branch pipe 21, and the water level in the purification tank rises to the level detected by the water level sensor 9.

As a result, the floc floating above the inside of the purification tank 4 can be discharged from the discharge port 10 to a drainage passage or the like so that the polluted water in the purification tank 4 can be purified.

It is to be noted that the tap water supply channel 2 is used only at the start of the first operation.
If tap water is supplied into the purified water storage tank 13 from 9, the next time the purified water in the purified water storage tank is fed back to the purification tank 4, the flocs floating in the purification tank can be discharged. Tap water can be further saved as compared with a case where tap water is supplied to the purification tank 4 and flock is discharged.

When the polluted water in the purification tank 4 is purified, the first and third on-off valves 22 and 24 are closed and the second and fourth on-off valves 23 and 26 are opened, and the water purification pump 20 is operated. Then, the purified water in the purification tank 4 is supplied to and stored in the purified water storage tank 13 through the main water passage 19.

On the other hand, when the purified water in the purified water storage tank 13 is used for car washing or the like, the first, second and fourth on-off valves 2 are used.
By closing the second and third opening / closing valves 24 and 27 and closing the second and third opening / closing valves 24 and 27 to operate the water purification pump 20, the purified water supply port 14-the second branch pipe 25-the water purification pump 20-the main water passage. 1
9- Water can be supplied through the purified water supply pipe 28.

With these configurations, a single water purification pump 20 can provide feedback during purification, supply purified water, and the like, and can reduce costs by reducing the number of parts. .

FIG. 2 shows an embodiment in which a plurality of the purification tanks 4 and the purified water storage tanks 13 are connected in parallel to increase the processing capacity, and the sewage water supply passage 11 is connected to a sewage water supply pump 12.
The sewage water supply pump 12 is branched by branching further downstream to supply polluted water to each of the purification tanks 4..., And branching and connecting the first branch pipe 21 and the second branch pipe 25 to each of the purified water storage tanks 13. The water purification capacity can be increased or decreased without increasing the number of water purification pumps 20.

The mounting position of the water level sensor, the connection position of each pipe, and the connection position of the on-off valve in the above embodiment are not limited to the embodiment, and can be set as appropriate.

[0032]

According to the constitution of the present invention, the polluted water generated by car washing and water sprinkling is purified by the aggregating means, whereby the detergent, oil, wax, sludge and the like contained in the polluted water are efficiently purified, and the purified water is purified. Even if it is reused, it is possible to minimize the decrease in cleaning ability.

According to the second aspect of the present invention, the tap water is discharged by discharging the pollutants floating on the upper part of the water stored in the water storage means to outside using the cleaning water purified by the purification means. The tap water can be saved compared with the case where pollutants are discharged by raising the water level of the water storage means by using the tap water.

According to the third aspect of the present invention, contaminants can be efficiently removed with a relatively simple structure by using an electrode such as aluminum as the aggregating means.

According to the structure of the present invention as set forth in claim 4, relatively large contaminants and water are separated by a filtration filter provided in a drain passage, and the separated contaminants are treated as garbage. The burden on the sewer system can be reduced.

According to the fifth aspect of the present invention, by adding the coagulant to the purifying means by the adding means, it is possible to promote the coagulation of pollutants by the purifying means and to efficiently purify water. You can do it.

According to the sixth aspect of the present invention, by arranging a plurality of purifying means and / or purified water storing means in parallel,
Purification capacity can be increased or decreased according to the volume of water generated by car washing or the like.

According to the structure of the present invention, the sterilizing means is provided in the purifying means and / or the purified water storage means, so that even if these waters are stored for a long time, the sterilizing means can remove general bacteria and the like. It can prevent the growth and prevent the deterioration of water quality due to the growth and decay of these bacteria.

According to the constitution of the present invention, since the sterilizing means is made of ore or the like containing metal ions, maintenance can be performed at a relatively low cost, the sterilizing effect is stabilized, and particularly, the quality of purified water deteriorates. Can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sewage storage tank 4 Purification tank 7 Coagulation means 11 Sewage water supply path 13 Purified water storage tank 18 Water supply path 31 Sterilization means 33 Discharge path 34 Filtration filter 35 Addition means 7

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁶ Identification code FI C02F 1/50 531 C02F 1/50 531E 531C 540C 540 550B 550 560F 560 560Z 1/52 Z 1/52 9/00 502P 9/00 502 502D 502M (72) Inventor Kazuya Osugi 3-201 Minamiyoshikata, Tottori City, Tottori Pref.

Claims (8)

[Claims] 1. A sewage storage means for storing polluted water, a purifying means for purifying polluted water by a coagulation means, a purified water storage means for storing purified water purified by the purifying means, and a water stored in the sewage water storage means. Sewage feeding means for feeding the polluted water to the purification means, and feedback means for feeding a portion of the purified water stored in the purified water storage means to the purification means, and discharging the pollutants floating on the upper part of the stored water of the purification means. And a polluted water purification device comprising: 2. The water purifier according to claim 1, wherein said purifying means includes a water storage means for storing polluted water, a coagulation means, a water level adjusting means for adjusting a water level of said water storage means, and a discharge for discharging contaminants floating on the upper part of said water storage means. The polluted water purification apparatus according to claim 1, wherein the apparatus is constituted by means. 3. The method according to claim 2, wherein the aggregating means comprises an electrolysis device using one electrode of aluminum or an aluminum alloy, and the other electrode using any one of an aluminum alloy, stainless steel, and titanium. The polluted water purifier according to the above. 4. The polluted water purification device according to claim 2, wherein a filtration filter is provided in a drain passage of the discharge unit. 5. The polluted water purifying apparatus according to claim 2, wherein said purifying means is provided with an adding means for adding a flocculant. 6. The polluted water purifying apparatus according to claim 1, wherein a plurality of said purifying means and / or purified water storage means are arranged in parallel. 7. The polluted water purifying apparatus according to claim 1, wherein a sterilizing means is provided in said purifying means and / or the purified water storing means. 8. The apparatus for purifying polluted water according to claim 7, wherein said sterilizing means is made of ore or the like containing a metal such as Cu, Ag, Mg and / or metal ions.