JP3175104B2 - Water cleanliness check method and cleanliness check tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for confirming cleanliness of water and a tank for confirming cleanliness, and more particularly to a method for purifying water by detecting transparency and chromaticity of contamination using an optical sensor. It is related to the technology for checking the degree.

[0002]

2. Description of the Related Art As a conventional technique relating to a method for checking cleanliness of water and a tank for checking cleanliness, there is a freshwater check tank 51 shown in FIG. In this case, in FIG. 3, reference numeral 51 denotes a fresh water confirmation tank, which is divided into two tanks, an inlet tank 51e and an outlet tank 51f, and communicates with each other through a communication passage 51c.
Therefore, if there is oil or light foreign matter, the oil or light foreign matter floats above the inlet tank 51e. Further, a plastic transparent lid 52 from which the inside can be seen is installed on the upper part of the fresh water confirmation tank 51.
On the side of e, a fresh water inlet 52a for introducing fresh water was provided.

A drain port 51b as a cleaning hole is provided at the lowermost portion of the inlet tank 51e, and is usually closed by a plug 53. On the other hand, a drain port 51a is provided near the center of the side surface of the outlet tank 51f, so that fresh water can flow out.

[0004]

However, such a conventional fresh water check tank has the following problems. First, because it is visual, it relies on human perception and has problems with accuracy. Second, automation was difficult. Therefore, there was always the danger that the dirty water would be washed away in a river without your knowledge. An object of the present invention is to solve such a problem.

[0005]

According to the present invention, the degree of cleanliness is determined by measuring the chromaticity of the contaminated foreign matter by attaching the levitated foreign matter to the sheet 12 disposed on the surface of the water, and comparing the measured chromaticity with a reference value of a clean state. It is characterized by judging, furthermore, the transparency of water in a quiet state and the contaminating chromaticity of the contaminated foreign matters attached to the sheet 12 disposed on the water surface are measured, and the transparency and the contaminating chromaticity are measured. It is characterized by judging cleanliness by combining both and comparing it with a clean condition standard,
Further, as a criterion for the clean state, a limit point B
The above-mentioned problem was solved by providing two stages of the warning point A.

Further, a contamination chromaticity detecting optical sensor 13 for attaching the floating foreign matter to the sheet 12 disposed on the water surface and measuring the contamination chromaticity is disposed in the cleanliness checking tank 20. And an optical sensor 11 for detecting transparency.
And a contaminant chromaticity detecting optical sensor 13 for measuring the contaminated chromaticity by adhering the floating foreign matter to the sheet 12 disposed on the water surface, and further disposed in the cleanliness checking tank 20. In the cleanliness checking tank 20, the water receiving tank 6 and the measuring tank 7 are completely separated from each other by a partition 21, and the water receiving tank 6 and the measuring tank 7 The above-mentioned problem was solved by being characterized in that the communication was performed by the communication pipe 5.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for confirming the cleanliness of water and a tank for confirming the cleanliness according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram illustrating the configuration of the entire water cleanliness checking tank according to the present invention, and FIG. 2 is a diagram illustrating a change in the amount of received light.

[0008] Regarding water contamination, various standards are determined in the country. Specifically, there are a hydrogen ion concentration, a biochemical oxygen demand, a chemical oxygen demand, a suspended substance amount, a normal hexane extract substance content, and so on. It is the idea of the present invention that the amount of suspended solids and the content of extracted normal hexane can be replaced by measuring the transparency of water and the chromaticity of water contamination.

In this case, as water to be measured, fresh water flowing from a factory to a river, fresh water obtained by separating oil and water of drain water generated by a compressor, etc. are used to finally confirm water considered to be clean. It is very effective to use the method for checking cleanliness of water and the tank for checking cleanliness according to the present invention.

[0010] In general, contaminated water is filtered to be fresh water by various filters.
These filters have a reduced ability to filter over time. What shows this process is shown in FIG.
It is a figure showing transition of the amount of received light.

That is, as the elapsed time advances, the amount of received light decreases as shown in the graph of the change in the amount of received light. This reduces the filtration capacity of the filter,
This is because the water to be clean has become dirty. Here, in the present invention, a warning point A which is a warning value r1 of the received light amount and a limit point B which is a limit value r2 of the received light amount are set by utilizing the property of the decrease of the received light amount, and the water cleanliness confirmation method is performed. And used for cleanliness checking tanks.

In FIG. 1, reference numeral 20 denotes a cleanliness checking tank. The water receiving tank 6 and the measuring tank 7 are completely separated from each other by a partition 21 and are located at a portion of the cleanliness checking tank 20 which is neither a water surface nor a bottom. , The water receiving tank 6 and the measuring tank 7 communicate with each other by the connecting pipe 5. The connecting pipe 5 has an L-shape, and the inlet is located below the water receiving tank 6 with respect to the outlet. Floating substances and oil floating on the water surface of the water receiving tank 6 are fed into the measuring tank 7. It is considered not to be.

In this case, the reason why the water receiving tank 6 and the measuring tank 7 communicate with each other by the connecting pipe 5 at a part that is neither the water surface nor the bottom is that the sediment-contaminated foreign matter 8 is held in the water receiving tank 6 and This is to prevent intrusion and prevent the suspended matter on the water surface of the water receiving tank 6 from being sent into the measuring tank 7.

On the upper surface of the water receiving tank 6, a transparent water receiving tank lid 3 is provided.
Is provided, and an introduction pipe 1 for introducing the measured water 4 through the water tank cover 3 is provided. Further, a transparent measurement tank lid 2 is provided on the uppermost surface of the measurement tank 7. If the cleanliness checking tank 20 is entirely transparent, conventional visual check can also be performed.

On the other hand, the measuring block 1
5 are provided. In this case, the measurement block 15 is provided with an optical sensor 11 for detecting transparency and an optical sensor 13 for detecting chromaticity of contamination, and a reflector 9 and a sheet 12 related to the sensors 11 and 13.

That is, the contamination chromaticity detecting optical sensor 13 is for confirming the state of dust and oil floating on the water surface of the measuring tank 7, and is disposed on the water surface portion of the measuring block 15. Sheet 12 made of white fiber, paper, etc.
Water on the water surface is attached to the light sensor 13 for detecting chromaticity of contamination.
By directly hitting the sheet 12 on the sheet 12 and receiving the reflected light again with the contamination chromaticity detection optical sensor 13.
The chromaticity of water contamination due to contamination of the sheet 12 is measured.

The contamination chromaticity detecting optical sensor 13 and the sheet 12 are mounted on a measuring block 15. As for the water surface of the measuring tank 7, an outlet 10 is provided above the measuring tank 7, and is determined by the position of the outlet 10.

Furthermore, the optical sensor 11 for detecting transparency is replaced by measuring the degree of contamination of the water 4 to be measured in the measuring tank 7 with the transparency. The light emitted from the optical sensor 11 travels to the water 4 to be measured and the reflection plate 9 installed on the measuring block 15, returns to the optical sensor 11 for transparency detection through the water 4 to be measured, and returns to the optical sensor 11 for detecting transparency. The optical sensor 11 for detecting transparency and the reflection plate 9 are arranged in the measurement block 15 so that the light transmission is formed.

When measuring the transparency, the measured water 4
In order to prevent air or air bubbles from entering the space, the portion where the transparency detecting optical sensor 11 of the measurement block 15 is installed is disposed below the water surface, and care is taken so that the water surface always adheres to the measurement block 15. It is important.

The optical sensor 13 for detecting chromaticity of contamination and the optical sensor 11 for detecting transparency are connected to a detection signal control device 14. The detection signal control device 14 determines the alarm value r1 of the light receiving amount at the alarm point A of the reference value and the alarm point B
, The reference value and the measured value are compared, and the comparison result and the like are used to store the sensor 11,
When both of the sensors 13 and 13 reach the limit value r2 of the amount of received light, “replace the filter”. When one of the sensors 11 and 13 reaches the limit value r2 of the amount of received light, “critical attention”. When the alarm value r1 is reached, a function of making a judgment such as "caution" is provided.

However, the degree of contamination of the water 4 to be measured may be determined independently of the result of the optical sensor 13 for detecting chromaticity of contamination and the result of the optical sensor 11 for detecting transparency without connecting to the detection signal control device 14. Absent.

Up to this point, the optical sensor 13 for detecting the chromaticity of contamination has been described.
Although it is described that both the optical sensor 11 and the optical sensor 11 for detecting transparency are provided, a configuration of only one of the optical sensor 13 for detecting contaminated chromaticity and the optical sensor 11 for detecting transparency may be considered.

For various warnings such as "filter replacement", "critical attention", "caution", etc., a warning sound distinguished by sound, a warning light distinguished by color, and other detection signals are issued. It is also possible. Further, these various operations can be performed by remote control by receiving a detection signal in a control room or a remote place. Further, in order to exclude erroneous detection of the detection signal from the determination, it is possible to adopt a control method in which a determination signal is output when the detection signal continues for a preset time.

The cleanliness checking method and the cleansing tank according to the present invention are configured as described above, and the operation thereof will be described below.

First, the water 4 to be measured is introduced into the water receiving tank 6 of the cleanliness confirmation tank 20 from the upper introduction pipe 1. In this case, with respect to the measured water 4, in most cases, fresh water flows so that there is no problem even if the water is allowed to flow directly into the river.

On the other hand, the measured water 4 entering the water receiving tank 6 is wavy on the water surface, but sediment-contaminated foreign matters 8 are settled on the bottom, and suspended matter and oil are suspended on the water surface. In such a situation, clean relatively gentle water 4 to be measured slightly below the center of the water receiving tank 6 flows through the connecting pipe 5 into the measuring tank 7. Therefore, a flow is formed between the communication pipe 5 and the discharge port 10 on the measurement tank 7 side, but the flow can be kept quiet.

Therefore, the measured water 4 flowing into the measuring tank 7
Is supposed to be clean, but like the water receiving tank 6, sediment-contaminated foreign matters are settled at the bottom, and suspended matter and oil float on the water surface. In such a situation, the contamination chromaticity of the water surface of the measuring tank 7 is determined by attaching the water of the water surface to the sheet 12 disposed on the water surface of the measuring tank 7 and directly transmitting the light from the contamination chromaticity detecting optical sensor 13 to the sheet. 12
It is measured by hitting it.

Further, the transparency of the measured water 4 flowing into the measuring tank 7 is obtained by storing the light from the transparency detecting optical sensor 11 in the measuring block 15 which is transparent to the measured water 4 through the transparent measuring block 15. The reflected light from the reflecting plate 9 advances to the water 4 to be measured, and finally returns to the transparency detecting optical sensor 11, and measures the transparency based on the intensity of the returned light. .

On the other hand, the measured values of the stained chromaticity detecting optical sensor 13 and the transparency detecting optical sensor 11 are sent to a detection signal control device 14, and the cleanliness is confirmed by comparing with a reference value stored in advance. I have. In this case, depending on whether the contamination chromaticity and the transparency are the limit value or the alert value, and by combining both the measured values, whether or not the contamination is the limit dirt such as "filter exchange" ... It is possible to indicate a judgment such as "warning", "caution", etc., which is an alert state that requires attention.

As described above, in the detection signal control device 14, various judgments are made by comparing the measured value with the reference value stored in advance, and furthermore, the judgment is made according to a fixed agreement. It can be said that processing and remote control processing are easy.

[0031]

As is clear from the above description, the following effects can be obtained by the present invention. First, the degree of water contamination can be determined independently of human perception by substituting the contamination chromaticity and transparency by measuring the amount of light received by the contamination chromaticity detection optical sensor and the transparency detection optical sensor. And the accuracy has improved. Further, the accuracy was further improved by the double check using the optical sensor for detecting the contamination chromaticity and the optical sensor for detecting the transparency.

Second, the installation of the sensor and the detection signal control device facilitates the automation process. Therefore, unlike the treatment based on human feeling, it is possible to prevent the sewage from flowing into the river by mistake. Third, the cleanliness check tank consisting of the water receiving tank and the measurement tank keeps the inside of the measurement tank quiet, and ensures the measurement accuracy of the optical sensor for detecting contamination chromaticity and the optical sensor for detecting transparency. became. Fourth, by making the entire cleanliness checking tank transparent, conventional visual checking has become possible as before.

[Brief description of the drawings]

FIG. 1 is a diagram showing the overall configuration of a water purity check tank according to the present invention.

FIG. 2 is a diagram showing a change in the amount of received light.

FIG. 3 is a diagram showing the entire configuration of a conventional fresh water check tank.

[Explanation of Signs] 1 ... Introduction pipe 2 ... Measurement tank lid 3 ... Reception tank lid 4 ... Measured water 5 ...・ Communication pipe 6 ・ ・ ・ ・ ・ ・ Water receiving tank 7 ・ ・ ・ ・ ・ ・ Measurement tank 8 ・ ・ ・ ・ ・ ・ Precipitated and contaminated foreign substances 9 ・ ・ ・ ・ ・ ・ Reflector plate 10 ・ ・ ・ ・ ・ ・ ・ Discharge port 11 ・············································································ Measurement block 16 ··· … Measurement light beam 20… Cleanliness check tank 21… Partition wall 51… Fresh water check tank 51a… Drainage port 51b… Drain port 51c… ··· Communication passage 51e ··· Inlet tank 51f ··· Outlet tank 52 ··· Lid 52a ··· Shimizu inlet 53 ··· Plug A ·········· Warning point B: Limit point r0: Initial value of received light amount r1: Warning value of received light amount r2: Limit value of received light amount t0: Start time t1 ···· Warning time reaching time t2 ···· Limit value reaching time

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01N 21/27 G01J 3/46 G01N 21/59 G01N 21/77 G01N 33/18

Claims (6)

(57) [Claims] 1. A sheet in which floating foreign matter is disposed on a water surface.
(12) A method for confirming the cleanliness of water, comprising measuring the contaminated chromaticity of the water adhered to (12) , and comparing the measured chromaticity with a reference for a clean state to determine the cleanness. 2. The transparency of water in a quiet state and the difference
Things the measuring its <br/> contamination chromaticity to adhere to the sheet (12) which is arranged on the water surface, both said contamination chromaticity and the transparency
A method for confirming the cleanliness of water, wherein the cleanliness is determined by combining and comparing with a reference of a clean state. 3. The water purifying method according to claim 1, wherein two criteria of a limit point (B) and a warning point (A) are provided as the criteria of the clean state. Degree confirmation method. 4. A sheet in which floating foreign matter is disposed on a water surface.
A cleanliness checking tank for water, wherein an optical sensor (13) for detecting stained chromaticity, which is attached to (12) and measures the stained chromaticity, is disposed in a cleanness checking tank (20). 5. The transparency detection optical sensor (11), floating
The foreign matter is attached to the sheet (12) disposed on the water surface.
A water purification sensor for detecting the contamination chromaticity of the contaminated water, wherein the optical sensor (13) for detecting the contamination chromaticity is disposed in the cleanness confirmation tank (20). 6. The cleanliness checking tank (20) is completely separated from a water receiving tank (6) and a measuring tank (7) by a partition (21). in non-bottom portion, wherein, characterized in that said measuring tank and receiving tank (6) (7) communicates with the connecting pipe (5)
The water purity check tank according to claim 4 or 5 .