JP2020164235A - Underground permeation prevention facility - Google Patents

Abstract

To provide underground permeation prevention facilities capable of determining whether or not there is a liquid inside the underground permeation prevention facilities and whether or not the liquid includes a specific component when there is the liquid inside.SOLUTION: The present invention relates to underground permeation prevention facilities that comprise an impermeable bottom part and an impermeable bank part protruding upward or substantially upward from the bottom part, and that have facilities for containing a liquid including a specific component or piping in which the liquid flows installed in an inner part surrounded with the bank part, and prevents, if the liquid leaks out of the facilities or the piping, underground permeation of the liquid from the facilities or the piping. The underground permeation prevention facilities comprise a sensor having a first sensor function of detecting whether or not there is a liquid inside the underground permeation prevention facilities and a second sensor function of detecting whether or not the liquid includes the specific component in the presence of the liquid inside the underground permeation prevention facilities.SELECTED DRAWING: Figure 2

Description

The present invention relates to a facility for accommodating a liquid containing a specific component and an underground infiltration prevention facility in which a pipe through which the liquid flows is installed.

Many facilities such as waste liquid water tanks, chemical liquid tanks, water treatment facilities, membrane treatment facilities, and wastewater treatment facilities contain liquids containing specific components such as chemicals, and if necessary, such as this. Drain the liquid from a facility by piping and send it to the required or treated area.

Leakage of liquids containing such specific components from facilities and pipes may contaminate surrounding soil, groundwater, rivers, and the sea. In order to prevent such contamination, for example, the facility is installed in the liquid barrier and the pipe is installed in the trench (Patent Document 1, Non-Patent Document 1).

Here, when underground infiltration prevention equipment such as a liquid barrier or trench is outdoors, if rainwater collects inside the underground infiltration prevention equipment due to rainfall and liquid leaks from the facility or piping in that state, , The leaked liquid may overflow from the bank and flow out to the outside of the underground infiltration prevention equipment. Therefore, it is necessary to promptly discharge the rainwater inside the underground infiltration prevention equipment to the outside.
However, it cannot be denied that the liquid inside this underground infiltration prevention facility may be a leaked liquid from the facility or piping, or a mixed liquid of the leaked liquid and rainwater, and various measurements and analyzes are performed to carry out various measurements and analyzes such as rainwater. It was necessary to discharge the liquid after confirming that it was a liquid that would not cause environmental pollution.

JP-A-2017-007711

Ministry of the Environment Water and Air Environment Bureau Groundwater and Ground Environment Office, "Lecture 1 Outline of Water Pollution Control Law Amendment (Structural Regulation System)", [online], Ministry of the Environment, [Search on February 1, 2019], Internet <URL: https://www.env.go.jp/water/chikasui/brief2012/manual/kouen_full.pdf>, (See the figure on the bottom of page 3 and the table on the top of page 24).

The present invention solves such problems of the prior art, that is, in a facility containing a liquid containing a specific component or an underground infiltration prevention facility in which a pipe through which such a liquid flows is installed, the presence or absence of a liquid, and When there is a liquid, it is an object of the present invention to provide an underground infiltration prevention facility capable of determining whether or not the liquid contains a specific component.

The underground infiltration prevention equipment of the present invention is used to solve the above problems.
(1)
An underground infiltration prevention facility consisting of an impermeable bottom and an impermeable embankment that is integrally or integrally provided with the bottom and projects upward or substantially upward from the bottom.
A facility for accommodating a liquid containing a specific component or a pipe through which the liquid flows is installed inside the bank surrounded by the bank, and when the liquid leaks from the facility or the pipe, the liquid permeates underground. To prevent
The first sensor function that detects whether or not there is a liquid inside the underground infiltration prevention equipment, and whether or not the liquid contains the specific component when there is a liquid inside the underground infiltration prevention equipment. An underground infiltration prevention facility characterized by having a second sensor function for detecting and a sensor having the function.
(2)
Discharge means for discharging the liquid inside the underground infiltration prevention equipment to the outside of the underground infiltration prevention equipment, and
When there is a liquid inside the underground permeation prevention equipment and the liquid does not contain the specific component, the discharge control means for discharging the liquid to the outside of the underground permeation prevention equipment by the discharge means.
The underground infiltration prevention equipment according to (1), which comprises.
(3)
A liquid feeding means for sending the liquid inside the underground infiltration prevention equipment to the outside of the underground infiltration prevention equipment, and
When there is a liquid inside the underground permeation prevention equipment and the liquid contains the specific component, the liquid feeding control means for feeding the liquid to the outside of the underground permeation prevention equipment by the liquid feeding means.
The underground infiltration prevention equipment according to (1) or (2), which comprises.
(4)
A first sensor function that detects whether or not there is a liquid inside the underground infiltration prevention equipment, and detects whether or not the liquid contains a specific component when there is a liquid inside the underground infiltration prevention equipment. The underground infiltration prevention equipment according to any one of (1) to (3), wherein one sensor also functions as a second sensor.
(5)
The sensors are an electric conductivity meter, a pH meter, a turbidity meter, a transparency meter, a color difference meter, an absorptiometer, a fluorescence meter, a COD meter, a BOD meter, a TOC meter, various ion-selective electrodes, a refractometer, and a salt content. The underground infiltration prevention facility according to any one of (1) to (4), wherein the device is one or more selected from a meter, a sugar meter, and a liquid level meter.

Since the underground infiltration prevention equipment of the present invention has the above configuration and includes a sensor, the presence or absence of a liquid inside the underground infiltration prevention equipment and, if there is a liquid inside, whether or not the liquid contains a specific component. It becomes possible to discriminate.

In addition to the above configuration, when there is a discharge means for discharging the liquid inside the underground infiltration prevention equipment to the outside of the underground infiltration prevention equipment and the liquid is inside the underground infiltration prevention equipment and the liquid does not contain a specific component. In addition, by providing a discharge control means for discharging the liquid to the outside of the underground penetration prevention equipment by the discharge means, fresh water such as rainwater, irrigation water, and tap water is stored inside the underground penetration prevention equipment for a long time. This can be prevented, and in the unlikely event that the liquid leaks from a facility or pipe that stores the liquid containing a specific component, it is possible to reliably prevent the liquid from flowing out to the outside.

In addition to the above configuration, there is a liquid feeding means that sends the liquid inside the underground infiltration prevention equipment to the outside of the underground infiltration prevention equipment, and there is a liquid inside the underground infiltration prevention equipment, and the liquid contains a specific component. Occasionally, by providing a liquid feeding control means for sending the liquid to the outside of the underground permeation prevention equipment by the liquid feeding means, when the liquid containing a specific component leaks, the liquid is discharged to the wastewater treatment facility or the like. It is possible to quickly send liquid to a tank or the like.

In addition to the above configuration, the first sensor function that detects whether or not there is liquid inside the underground infiltration prevention equipment and whether the liquid contains a specific component when there is liquid inside the underground infiltration prevention equipment. By configuring the second sensor function to detect whether or not it is present and the configuration in which one sensor also serves, the configuration of the underground infiltration prevention equipment can be simplified, and its control can be facilitated. It will be possible.

In addition to the above configuration, the sensor includes an electric conductivity meter, a pH meter, a turbidity meter, a transparency meter, a color difference meter, an absorptiometer, a fluorescence meter, a COD meter, a BOD meter, a TOC meter, and various ion selectivity. It can be configured to be one or more selected from an electrode, a refractometer, a salt meter, a sugar meter, and a liquid level meter, and at this time, it is possible to correspond to various specific components.

It is a model diagram which shows the liquid barrier which is an example of the underground infiltration prevention equipment of this invention. It is explanatory drawing about the operation of the liquid barrier of FIG. It is explanatory drawing which shows an example of the method of keeping the detection part of the sensor of the liquid barrier of FIG. 1 in a liquid. It is explanatory drawing which shows the other example of the method of keeping the detection part of the sensor of the liquid barrier in liquid. It is a model sectional view which shows the trench which is another example of the underground infiltration prevention equipment of this invention.

The underground infiltration prevention equipment in the present invention is an internal liquid barrier to prevent the diffusion or underground infiltration of the liquid when the liquid inside the storage tank, the reaction vessel, etc. leaks, or a pipe through which the liquid flows. It refers to, but is not limited to, a trench (U-shaped groove) for preventing the diffusion or underground permeation of the liquid when the liquid leaks.

The underground infiltration prevention equipment of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the liquid barrier 3 which is an example of the underground infiltration prevention equipment of the present invention has an impermeable bottom 3a and an impermeable bottom 3a which is integrally provided with the bottom 3a and projects upward from the bottom 3a. It consists of a sex bank 3b.
Inside the liquid barrier 3, a facility 1 for accommodating a liquid 2 containing a specific component that may contaminate the surrounding environment when leaked is installed. The liquid barrier 3 has a sufficient capacity for the amount of liquid 2 contained in the facility 1 and prevents contamination of the surrounding environment even when the liquid 2 leaks from the facility 1. be able to.
The liquid barrier may refer only to the embankment without including the bottom, but the liquid barrier in the present invention has an impermeable bottom and a bottom that is integrally or integrally provided with the bottom. It refers to an impermeable bank that protrudes upward or substantially upward.

In the present invention, the specific component is contained in the liquid 2 of the facility 1 and is rarely found in rainwater that may collect in the liquid barrier 3 or fresh water such as irrigation water or tap water used in a plant equipped with the facility 1. It is a component that is not contained at all, and is a component that may pollute the environment if it leaks to the outside.
Specific components include not only components that are soluble in liquids, such as acids, alkalis, disinfectants, and various organic substances, but also components that make up suspensions with dispersion media, components that make up emulsions with liquids, or , The components constituting the slurry together with the liquid, etc., but the specific components of the present invention are not limited to these.
In the following description, as a liquid 2 containing a specific component, the specific component is a component that enhances the electric conductivity of water, and the liquid 2 is more than fresh water such as rainwater, irrigation water, and tap water due to this specific component. Although the case of water having high electric conductivity is described, the present invention is not limited thereto.

In the example shown in FIG. 1, an electric valve 5 is opened on the right side of the bottom 3a of the liquid barrier 3 of the facility 1 as a discharge means for discharging the liquid inside the liquid barrier 3 to the outside of the liquid barrier 3. It is provided with a discharge pipe 6 for discharging the liquid inside the liquid barrier 3 to the discharge groove 7 outside the liquid barrier 3.
Further, as a sensor 4 on the left side in the drawing of the facility 1, in this example, an electric conductivity meter and a liquid barrier 3 as a liquid feeding means for sending the liquid inside the liquid barrier 3 to the outside of the liquid barrier 3. In this example, the liquid feeding pipe 8 to which the liquid feeding pump 8a is connected is sent to the outside, for example, a wastewater treatment facility or a tank that treats a liquid containing a specific component so as not to cause environmental pollution. Is equipped with.

The electric conductivity meter is a sensor that has a pair of electrodes and measures the electric conductivity of the liquid between these electrodes. For example, the liquid 2 containing a specific component housed in the facility 1 determines the electric conductivity as a specific component. In the case of a liquid containing a substance to be increased, the liquid from the facility 1 is obtained by comparing the electric conductivity of the water accumulated in the liquid barrier 3 with the electric conductivity of the liquid containing no specific component such as rainwater measured in advance. It is possible to detect the presence or absence of leakage of 2.
Further, in the electric conductivity meter, when there is no liquid between the two electrodes, the electric conductivity is usually as low as 0 mS / m, so that the electrodes are located near the bottom 3a or the bottom 3a of the liquid barrier 3. By installing the electrical conductivity meter so that it is located, it is possible to detect the presence or absence of liquid inside the liquid barrier 3.

In this way, the electrical conductivity meter used in this example has a first sensor function that detects whether or not there is liquid inside the liquid barrier 3, and when there is liquid inside the liquid barrier 3. It is a sensor that also has a second sensor function to detect whether the liquid inside the liquid barrier 3 contains a specific component, but these detections can also be performed using two or more sensors. Yes, which is also included in the present invention.

Further, as shown in FIG. 2, the liquid barrier 3 includes discharge control means C1 and liquid feed control means C2.
One end of the discharge control means C1 is connected to the sensor 4 by a signal line S1 and a signal line S1a branched from the signal line S1, and the other end is connected to an electric valve 5 of the discharge pipe 6 by a signal line S2.
The liquid feed control means C2 is connected to the sensor 4 by a signal line S1 at one end and a signal line S1b branched from the signal line S1, and the other end is connected to the liquid feed pipe 8 by the signal line S3. It is connected to the liquid feed pump 8a, which is a submersible pump installed on 3a.
Although an electric valve is used in this example, there is a possibility that the liquid inside the liquid barrier 3 contains solid matter such as dust, and even in that case, the electric valve is used. This is because the possibility of malfunction due to so-called "biting" is smaller than that of the solenoid valve, but the solenoid valve can also be used in the present invention. Further, although the electric valve 5 is provided in the discharge pipe 6 as the discharge means in the above example, a pump can be used instead of the electric valve.

Further, in the above example, the submersible pump is installed inside the liquid barrier 3 as the liquid feed pump 8a, but the liquid feed pump may be connected to the outer portion of the liquid barrier 3 of the liquid feed pipe 8. In this case, in order to prevent the backflow of the liquid in the liquid feeding pipe 8 and the outflow of the liquid inside the liquid barrier 3 to the outside through the liquid feeding pipe 8 when the liquid feeding pump 8a is stopped, the liquid feeding pump 8a An opening / closing means such as an electric valve or a solenoid valve, which is interlocked with the operation of the above, is installed in the liquid feeding pipe 8.

In this example, the discharge control means C1 and the liquid feed control means C2 each include components such as a CPU, a ROM, a RAM, and various interfaces. Although FIG. 2 shows two control means, the discharge control means C1 and the liquid feed control means C2, these control means may share a component and be integrated.

This underground infiltration prevention equipment operates as follows.
In the initial state, the motorized valve 5 is closed, and the liquid feed pump 8a is stopped. When liquids such as rainwater, irrigation water, and tap water collect inside the liquid barrier 3, the sensor 4 detects the liquid inside the liquid barrier 3, and the liquid inside the liquid barrier 3 is added to the liquid 2 of the facility 1. When the specific component contained in the liquid is not detected, the discharge control means C1 that receives this information from the sensor 4 via the signal lines S1 and S1b opens the electric valve 5 of the discharge pipe 6 via the signal line S2 to prevent liquid. The liquid in the bank 3 is discharged to the discharge groove 7, and then the electric valve 5 is closed when the sensor 4 detects the discharge of all the liquid.

Further, when the liquid 2 leaks from the facility 1, the sensor 4 indicates that the liquid inside the liquid barrier 3 contains a specific component in the liquid 2 of the facility 1, that is, the inside of the facility 1. Detects that the liquid 2 is leaking. The discharge control means C1 that receives this information via the signal lines S1 and S1a does not open the electric valve 5, or closes the electric valve 5 when the electric valve 5 is open.

On the other hand, it was detected that there was a liquid inside the liquid barrier 3 from the sensor 4 via the signal lines S1 and S1b, and that the liquid contained a specific component of the liquid 2 contained in the facility 1. Upon receiving the information, the liquid feed control means C2 activates the liquid feed pump 8a of the liquid feed pipe 8 via the signal line S3 to send the liquid inside the liquid barrier 3 to a predetermined wastewater treatment facility or tank. To do. Then, when the sensor 4 detects that the liquid inside the liquid barrier 3 has run out due to the liquid feeding, the liquid feeding pump 8a is stopped.

In addition, there is a possibility that the liquid 2 may leak from the facility 1 into the liquid barrier 3 during rainfall. In that case, the concentration of the specific component in the liquid inside the liquid barrier 3 is the concentration of the liquid in the facility 1. Although the concentration is lower than the concentration of the specific component, the type of the sensor 4 and the control threshold value of each of the above control means are appropriately determined so that the liquid containing the specific component does not flow into the discharge groove 7 even in that case.

Further, in the example shown in FIG. 1, since the liquid feeding pipe 8 is provided with the liquid feeding pump 8a as the liquid feeding means, the liquid inside the liquid barrier 3 is fed to a position higher than the bottom 3a of the liquid barrier 3. Liquid can be supplied, but when it is not necessary to supply liquid to such a high place, other opening / closing means such as a solenoid valve or an electric valve can be used instead of the liquid feeding pump 8a.

In the above example, the sensor 4 has a first sensor function for detecting whether or not there is a liquid inside the liquid barrier 3, and a liquid barrier 3 when there is a liquid inside the liquid barrier 3. A second sensor function that detects whether the liquid inside contains a specific component that increases the electrical conductivity and an electrical conductivity meter that can be combined by one sensor were used, but the identification contained in the liquid 2 Depending on the type of component, one or more other sensors can be appropriately selected.
As such a sensor, the sensor includes an electric conductivity meter, a pH meter, a turbidity meter, a transparency meter, a color difference meter, an absorptiometer, a fluorescence meter, a COD meter, a BOD meter, a TOC meter, and various ion selections. Examples thereof include a sex electrode, a refractometer, a salt content meter, a sugar content meter, a liquid level meter, and the like, which are appropriately selected according to the type of a specific component.

Here, as ion-selective electrodes, Na ⁺ , Cl ⁻ , Br ⁻ , I ⁻ , CN ⁻ , Cd ²⁺ , Cu ²⁺ , Ag ⁺ , S ^2-2 , F ⁻ , K ⁺ , Ca ²⁺ , NO ₃ ⁻ , _{^{NH 4 +, CO 3 2-,}} HCO 3 - is selectively detect electrodes and are known.

Among these sensors, in the case of a sensor such as a pH meter or an ion-selective electrode, which may cause a failure when the detection unit dries, a container for keeping the detection unit 4a of the sensor 4 in a liquid as shown as a model in FIG. 4b and the liquid level meter 9 can be used in combination to detect a specific component by the sensor 4 when the liquid level inside the liquid barrier 3 becomes higher than the height of the container 4b.
At this time, the liquid level gauge functions as a sensor for detecting whether or not there is liquid inside the liquid barrier 3, and the pH meter and the ion-selective electrode are used when there is liquid inside the liquid barrier 3. It functions as a sensor that detects whether or not the liquid contains a specific component.
When the liquid accumulated in the liquid barrier 3 has a specific component, the liquid having the specific component is contained in the container 4b even after the liquid is sent to the outside of the liquid barrier 3 by a liquid feeding means. However, this liquid may be replaced with a liquid containing no specific component by, for example, an automation facility (not shown).

FIG. 3 shows an example in which the container 4b is used to keep the detection unit 4a of the sensor 4 in the liquid. In this case, when the liquid level inside the liquid barrier 3 is not higher than the height of the container 4b, it is not possible to detect whether or not the liquid inside the liquid barrier 3 contains a specific component. In order to prevent such a delay in detection, instead of using the container 4b, a recess 4c may be provided in the bottom 3a of the liquid barrier 3, and the sensor 4 may be installed so that the detection section 4a is located in the recess 4c. ..

Liquids containing specific components may exist in pipes other than the facilities described above, and in order to prevent leakage from such pipes, the pipes are used as underground infiltration prevention equipment in U-shaped groove-shaped trenches. Install in. FIG. 5 shows a model cross-sectional view of a trench in which such a pipe is installed inside.

The trench 11 is composed of an impermeable bottom 3a and an impermeable embankment 3b that is integrally provided with the bottom 3a and projects upward from the bottom 3a, and a liquid containing a specific component is sent into the trench 11. A liquid pipe 10 is installed. Further, a sensor 4 is provided that detects whether or not there is a liquid inside the trench 11, and when there is a liquid inside the trench 11, detects whether or not the liquid contains a specific component.

Then, a discharge pipe 12 provided with a discharge pump 12a for discharging to the outside when a liquid containing no specific component such as rainwater is accumulated in the trench 11, and a trench 11 when a liquid containing a specific component is accumulated. A liquid feeding pipe 8 provided with a liquid feeding pump 8a for sending liquid to the outside is provided.

Although the present invention has been described above with reference to preferred embodiments, the underground infiltration prevention equipment of the present invention is not limited to the configuration of the above-described embodiment.

Those skilled in the art can appropriately modify the underground infiltration prevention equipment of the present invention according to conventionally known knowledge. Even with such a modification, as long as the structure of the underground infiltration prevention equipment of the present invention is provided, it is, of course, included in the category of the present invention.

1 Facility 2 Liquid 3 Liquid barrier 3a Bottom 3b Embankment 4 Sensor 4a Detection part 4b Container 4c Recess 5 Electric valve 6 Discharge pipe 7 Discharge groove 8 Liquid feed pipe 8a Liquid feed pump 9 Liquid level gauge C1 Discharge control means C2 Control means S1 Signal line S1a Signal line S1b Signal line S2 Signal line S3 Signal line 11 Trench 12a Discharge pump 12 Discharge piping

Claims (5)

An underground infiltration prevention facility consisting of an impermeable bottom and an impermeable embankment that is integrally or integrally provided with the bottom and projects upward or substantially upward from the bottom.
A facility for accommodating a liquid containing a specific component or a pipe through which the liquid flows is installed inside the bank surrounded by the bank, and when the liquid leaks from the facility or the pipe, the liquid permeates underground. To prevent
The first sensor function that detects whether or not there is a liquid inside the underground infiltration prevention equipment, and whether or not the liquid contains the specific component when there is a liquid inside the underground infiltration prevention equipment. An underground infiltration prevention facility characterized by having a second sensor function for detecting and a sensor having the function. Discharge means for discharging the liquid inside the underground infiltration prevention equipment to the outside of the underground infiltration prevention equipment, and
When there is a liquid inside the underground permeation prevention equipment and the liquid does not contain the specific component, the discharge control means for discharging the liquid to the outside of the underground permeation prevention equipment by the discharge means.
The underground infiltration prevention equipment according to claim 1, wherein the equipment is provided. A liquid feeding means for sending the liquid inside the underground infiltration prevention equipment to the outside of the underground infiltration prevention equipment, and
When there is a liquid inside the underground permeation prevention equipment and the liquid contains the specific component, the liquid feeding control means for feeding the liquid to the outside of the underground permeation prevention equipment by the liquid feeding means.
The underground infiltration prevention equipment according to claim 1 or 2, wherein the equipment is provided. A first sensor function that detects whether or not there is a liquid inside the underground infiltration prevention equipment, and detects whether or not the liquid contains a specific component when there is a liquid inside the underground infiltration prevention equipment. The underground infiltration prevention equipment according to any one of claims 1 to 3, wherein one sensor also functions as a second sensor. The sensors are an electric conductivity meter, a pH meter, a turbidity meter, a transparency meter, a color difference meter, an absorptiometer, a fluorescence meter, a COD meter, a BOD meter, a TOC meter, various ion-selective electrodes, a refractometer, and a salt content. The underground infiltration prevention facility according to any one of claims 1 to 4, wherein the device is one or more selected from a meter, a sugar meter, and a liquid level meter.

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