JP2000233181A - Ground water cleaning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To almost perfectly separate ground water in an oil-water turbid state into water and oil. SOLUTION: A ground water cleaning apparatus 10 is equipped with an oil-water separator 20 for separating ground water sent in an oil-water turbid state under pressure by a pump into water 60 and oil 65 floating on the surface of the water 60, the oil component storage tank 35A positioned under the oil- water separator 20 to receive and store oil 65 and a cleaning tank 70A positioned under the oil-water separator 20 and removing an oil component in water 60 during the passage of water 60 through an oil adsorbing material 49A in the tank 70A to discharge water 60 to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a groundwater purifier, and more particularly to a groundwater purifier for removing oil from groundwater.

[0002]

2. Description of the Related Art Various devices have been provided for purifying groundwater by removing only oil floating in the groundwater.

[0003]

However, groundwater purification equipment is required to operate continuously for a long period of time due to its nature. At that time, the rating of the running cost pump and the like must be kept as low as possible. Is required. In addition, shutting down the operation of the entire apparatus due to maintenance of a part of the apparatus causes interruption of groundwater purification and must be avoided.

[0004] Therefore, an object of the present invention is to provide a groundwater purifying apparatus capable of meeting such a demand.

[0005]

In order to solve the above-mentioned technical problems, the technical means adopted in the first aspect of the present invention is to convert oil-water turbid groundwater pumped by a pump into water and the water surface. An oil / water separator that separates from the oil floating in the oil / water separator, an oil storage tank located below the oil / water separator that receives and stores the oil, and an oil / water separator that is located below the oil / water separator and contains the water. A groundwater purifying apparatus includes a purifying tank that removes oil contained in the water while passing through the oil adsorbent and discharges the water to the outside.

In order to solve the above-mentioned technical problem, the technical means taken in the invention according to claim 2 is to convert oil-water turbid groundwater pumped by a pump into water and oil floating on the surface of the water. An oil / water separator for separating oil, a first oil storage tank for receiving and storing the oil, and a second oil storage for receiving and storing the oil while the reception of the oil into the first oil storage tank is suspended. A reservoir device and a purification tank containing the oil adsorbent, and removing the oil contained in the water while the water rises and passes through the oil adsorbent, and discharging the oil from the upper side of the oil adsorbent to the outside. In addition, a groundwater purification device was configured.

[0007] In order to solve the above technical problem, a technical measure taken in the invention according to claim 3 is to convert oil-water turbid groundwater pumped by a pump into water and oil floating on the surface of the water. An oil / water separator for separating oil, a first oil storage tank for receiving and storing the oil, and a second oil storage for receiving and storing the oil while the reception of the oil into the first oil storage tank is suspended. A reservoir, a first septic tank that contains an oil adsorbent, removes oil contained in the water while the water rises and passes through the oil adsorbent, and discharges the oil to the outside from above the oil adsorbent; and While the first septic tank is interrupting the reception of the water, the oil is removed in the same manner as the first septic tank with the oil adsorbent containing the water, and the oil is discharged to the outside from above. Constructing a groundwater purification system with a second septic tank It is that it was.

According to a fourth aspect of the present invention, there is provided a groundwater purifying apparatus according to the first aspect, wherein a separate oil component is provided between the oil-water separator and the septic tank. That is, the cartridge containing the adsorbent is detachably interposed.

[0009]

In the structure of the first aspect, since the septic tank is provided below the oil / water separator, the water separated from the oil by the oil / water separator can be supplied to the septic tank with a static pressure. . In other words, when the water separated from the oil is supplied to the septic tank, the driving force of the pump is not used, so that the rating of the pump can be reduced accordingly.

[0010] In the configuration of claim 2 described above, the first
When the oil storage tank cannot be used, for example, even when the full oil storage tank is removed from the groundwater purification device for disposal, the oil separated from the water in the oil-water separation device remains in the second oil storage tank. Since the water is stored, there is no need to interrupt the operation of the groundwater purification apparatus, and the operation can be performed for a long time.

[0011] In the configuration of the third aspect, the first
When the septic tank cannot be used, for example, even when the first septic tank is maintained, the water separated from the oil in the oil / water separator is purified in the second septic tank, so that there is no need to interrupt the operation of the groundwater purifying apparatus. , Long-term operation can be realized.

In the above construction, since the oil droplets are removed by the oil absorbing material in the cartridge, the load on the septic tank can be reduced, and the purifying capacity of the septic tank can be reduced or the service life can be prolonged. Can be. Further, since the cartridge is made of a transparent or translucent substance, the deterioration state of the purification ability of the oil adsorbent inside can be recognized by a color change, so that the replacement time is not missed.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 1, a groundwater purifying apparatus 10 includes an oil / water separator 20. Main body 21 of oil-water separator 20
The inflow port 22 formed on the lower side is connected to the discharge port of the pump 30 via a pipe 31. The suction port of the pump 30 is connected to a pipe 32 extending into a groundwater vein (not shown). When the pump 30 is driven by a command from the control device 50, the groundwater is separated from the oil / water separation device 20.
Into the main body 21 in a pressure-fed state.

The groundwater flowing into the main body 21 is in a state where water and oil are mixed (turbid state or emulsion state). 65. Thus, the first outlet 23 is formed in the inside of the main body 21, and when the water level of the water 60 rises, the oil 65 causes the internal passage of the float type float 90, the flexible hose 91, the pipe 33 and The oil is discharged to a first oil storage tank 35A (second oil storage tank 35B) via a pipe 33A on which the open / close valve 40A is mounted (a pipe 33B on which the open / close valve 40B is mounted).

The specific gravity of the float 90 is set between the specific gravity of water and the specific gravity of oil, that is, between 0.9 and 0.95.
When the float 90 floats, the main body 90a of the float 90 always projects slightly from the interface. Then, the oil 65 flows into the internal passage from the notch 91 of the float 90 and reaches the hose 91.

While the on-off valve 40A is open and the oil 65 is discharged to the first oil storage tank 35A, the on-off valve 40B is closed and the discharge of the oil 65 to the second oil storage tank 35B is prevented. . Thus, the first oil storage tank 35A and the second oil storage tank 35A
Both of the oil storage tanks 35B are movable, and
When it is visually recognized that the inside of the main body 36A of the oil storage tank 35A is full of the oil 65, the on-off valve 40A is closed and the on-off valve 40B is opened at the same time, and the oil 65 is stored in the second oil storage tank 35B. It is stored in the main body 36B. Thus, movement of the main body 36A to another place for disposal of the oil 65 in the main body 36A of the first oil storage tank 35A can be performed without interrupting the operation of the groundwater purification apparatus 10.

A second outlet 24 is formed below the main body 21 of the oil / water separator 20. The second outlet 24 is provided with a pipe 39 and an on-off valve 38A (on-off valve 38B). The inlet 7 formed below the main body 71A of the first oil purification tank 70A via the pipe 39A (pipe 39B) provided.
2A (inflow port 72B formed below main body 71B of first oil purification tank 70B). When the water level of the water 60 reaches a predetermined value, the fact is detected by the tap ball 80, and the control device 50 transmits the flow control valve 38A.
, The inflow of groundwater into the inlet 22 and the flow control valve 38
Equalize the amount of water 60 passing through A
It is designed to prevent entry into the oil storage tank 35A.

Although not shown, the inside of the main body 71A of the first oil purifying tank 70A is, for example, disclosed in Japanese Patent Application No. 9-200327.
As disclosed in the specification and drawings of No. 5, an oil adsorbent 49A formed of activated carbon carrying microorganisms is mounted, and is slightly present in water 60 pumped to an inlet 72A. To remove the oil that is mixed. Then, the purified water is discharged to the discharge pipe 77.
It is returned to the groundwater vein via A, or is used as factory tap water in factories and houses (not shown).

A discharge port 79A which is opened and closed by a valve 78A is formed in a lower portion of the main body 71A of the first oil purification tank 70A, and the precipitated oil is discharged from the discharge port 79A. In order to make the amount and density of water permeated to the oil adsorbent 49A uniform, the oil adsorbent 79A
Are supported by a mesh plate 48A installed at a position higher than the bottom of the main body 71A by a predetermined amount.

Thus, the main body 70B of the first oil purification tank 70A is connected to the main body 70B of the second oil purification device 70B.
And the second oil purification device 70B is operated when the operation of the first oil purification tank 70A is interrupted. That is, at the time of the periodic inspection of the first oil purification device 70A and the replacement of the oil adsorbent 49A, the valve 38B is opened at the same time as the valve 38B is opened, and the water 60 can be purified by the second oil purification device 70B. This allows
Even if the operation of one oil purification device is interrupted, the other oil purification device can be operated, so that the oil purification function is not interrupted.

As shown in FIG. 4, the flow of water passing through the oil adsorbent 49A (oil adsorbent 49B) loaded in the main body 71A of the first purification tank 70A (the main body 71B of the second purification tank 70B) is from above. At the same time, the oil adsorbent 49A
The maintenance of the (oil adsorbent 49B) is performed from the pipe 97A with the valve 96A (the pipe 97B with the valve 96B) to the main body 7A.
1A (main body 71B) is filled with fresh water into oil adsorbent 4
After passing through 9A (oil adsorbent 49B), piping 77
A (pipe 77B) may be discharged.

Further, as shown in FIG. 5, a pipe 39 communicating with both the first oil purifying tank 70A and the second oil purifying tank 70B and a pipe 1 protruding from the main body 21 of the oil / water separator 20 are provided.
01, a cartridge 105 filled with an oil adsorbent 103 formed of activated carbon carrying microorganisms may be removably interposed. That is, the cartridge 10
Reference numeral 5 denotes a cylindrical member formed of a transparent or translucent resin, and holes 105a and 105b are formed at both ends. A ring-shaped sealing member 10 is provided on the surface of each end.
7a and 107b are attached.

In order to keep a predetermined distance between the opening of the pipe 39 and the opening of the pipe 101, the lower sides of the two are provided with reinforcing plates 115.
Are connected by The reinforcing plate 115 also functions as support means for the cartridge 105. In the opening of the pipe 39, a slide body 113 that always projects by a predetermined distance by the urging force of the spring 111 is mounted. When the cartridge 105 is interposed between the pipe 39 and the pipe 101, The slide body 113 is pressed downward against the urging force of the spring 11 on the side of the seal member 107b of the cartridge 105. Once the cartridge 105 is interposed between the pipe 39 and the pipe 101, this interposed state is caused by the spring 11 which constantly urges the cartridge 105 toward the pipe 101.
1, it is held firmly. The cartridge 105
Hole 105a so that the oil adsorbent 103 does not flow out of the
-Filter media 119a and 119b are provided inside 105b.

The water flowing out of the oil / water separator 20 is
Before reaching the oil purification tank 70A (the second oil purification tank 70B), the oil is adsorbed by the oil adsorbent 103 in the process of passing through the cartridge 103 without fail. Therefore, the first
The purification capacity of the oil purification tank 70A (second oil purification tank 70B) can be reduced. Due to this reduction in purification capacity, the size of the first oil purification tank 70A (second oil purification tank 70B) can be made compact. If we take this from a different perspective,
The life of the oil adsorbent 49A (49B) of the first oil purification tank 70A (second oil purification tank 70B) can be extended. In addition, as the degree of purification increases, that is, as the accumulation of oil increases, the color of the oil adsorbent 103 changes in a direction in which the oil adsorbent becomes darker. This discoloration process can be easily understood by seeing through the transparent or translucent cartridge 103. Therefore, the oil adsorbent 103 can be replaced with a new one before the purification ability of the oil adsorbent 103 reaches its limit.

It is to be noted that the above description is merely an example, and that the same concept as the present invention belongs to the technical scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a system diagram of a groundwater purification apparatus according to the present invention.

FIG. 2 is a view in the direction of arrow A in FIG. 1;

FIG. 3 is a view in the direction of arrow B in FIG. 1;

FIG. 4 is a modification of the configuration shown in FIG.

FIG. 5 is a sectional view of a main part of a modification of the configuration shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 20 oil / water separator 21 main body 30 pump 33 flexible hose 49A oil adsorbent 49B oil adsorbent 60 water 65 oil 70A first purification tank 70B second purification tank

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/28 C02F 1/28 T

Claims (4)

[Claims] An oil-water separator for separating groundwater in an oil-water turbid state pumped by a pump into water and oil floating on the surface of the water, wherein the oil-water separator is located below the oil-water separator and receives the oil. The oil contained in the water is removed and the water is discharged to the outside while the water passes through the oil storage tank to be stored and the oil adsorbent that is located below and includes the oil-water separator. Groundwater purifier with a septic tank. 2. An oil / water separator for separating groundwater in an oil / water turbid state pumped by a pump into water and oil floating on the surface of the water, a first oil storage tank for receiving and storing the oil, and the first oil storage tank. A second oil storage and storage device for receiving and storing the oil while the oil is being received into the oil storage tank, and an oil adsorbent that is contained therein and the water rises and passes through the oil adsorbent. A purification tank for removing oil contained in the water and discharging the oil to the outside from above the oil adsorbent. 3. An oil-water separator for separating groundwater in an oil-water turbid state pumped by a pump into water and oil floating on the surface of the water, a first oil storage tank for receiving and storing the oil, A second oil storage and storage device for receiving and storing the oil while the reception of the oil into the oil storage tank is suspended, including an oil adsorbent, while the water rises and passes through the oil adsorbent; A first septic tank for removing oil contained in the water and discharging the oil from the upper side of the oil adsorbent, and an oil component containing the water while the first septic tank interrupts the reception of the water. A second method of removing the oil component in the same manner as the first septic tank using an adsorbent and discharging the oil from the upper side to the outside;
Groundwater purification equipment with a septic tank. 4. The groundwater purifying apparatus according to claim 1, wherein a cartridge containing another oil adsorbent is removably interposed in a pipe between the oil / water separator and the septic tank.