JP4756759B2 - Water treatment equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water treatment apparatus for obtaining treated water used for beverages, cosmetics, medicines, etc. by performing ion exchange in raw water, removing or separating impurities, or adjusting components.
[0002]
[Prior art]
For example, a water treatment apparatus is known in which raw water such as groundwater is passed through water treatment means to remove impurities and obtain treated water for beverages. In such a water treatment device, two water treatment units (treatment systems) are provided in parallel, and when one is in water treatment operation, the other can be continuously treated by regenerating the water treatment means. is there.
In such a continuous treatment, when the treated water pipe provided downstream of the water treatment means is shared, there is a possibility that the sewage during the regeneration treatment may be mixed into the treated water, so a valve is provided for mixing. Although it is prevented, the valve may leak due to damage to the valve, deterioration with time, or the presence of foreign matter.
In contrast, conventionally, as shown in FIG. 5A, joints 101a and 101b are provided in the treated water pipes 103a and 103b of the two water treatment units, and the joints are connected during the regeneration operation and the water treatment operation. It is known that the treated water and the waste water are caused to flow through the treated water transfer pipe 105 and the drain pipe 107, respectively.
Furthermore, as shown in FIG. 5B, a technique for changing the connection of the joints 101a and 101b by a rotating operation is also known.
[0003]
[Problems to be solved by the invention]
However, in the prior art shown in FIG. 5A, there is a problem that it is necessary to reconnect the joint every time the operation is switched, and it takes time to connect and disconnect the joint.
Further, in the prior art shown in FIG. 5B, connection and disconnection of the joint are easy, but switching for each operation is necessary, and there still remains a problem that it takes time, and the switching device becomes complicated. There is an inconvenience.
[0004]
Therefore, an object of the present invention is to provide a water treatment device having a simple configuration and capable of continuously operating a water treatment operation and a regeneration operation alternately and preventing contamination of treated water.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is connected to the raw water pipe, the water treatment means for treating the raw water introduced from the raw water pipe, the treated water pipe for transferring the treated water treated by the water treatment means, and the treated water pipe One and the other water treatment unit having a branch pipe for drainage and an on-off valve for the branch pipe for drainage are connected so that one treated water pipe and the other treated water pipe merge with each other. The one water treatment unit and the other water treatment unit are alternately operated in water treatment, and when one water treatment unit is in water treatment operation, the other water treatment unit is in a regeneration operation of water treatment means. A water treatment apparatus that performs preparatory operation after regeneration operation, and opens the open / close valve of the drainage branch pipe until the treated water is stabilized during the preparatory operation, and drains the treated water from the drainage branch pipe,
The conduit of each processing water pipes between one treated water units and other treated water units, Yes two tubes flow resistance is different is provided in parallel, the treated water is passed in while the water treatment operation flows through small tubes of water resistance, by the treated water flows through the large tube hydraulic resistance when are preparing operation, the pressure of one of the process water pipe that a water treatment operation, are preparing operation It is characterized by being higher than the water pressure of the other treated water pipe.
[0006]
In the first aspect of the present invention, the two water treatment units are alternately water-treated to continuously treat the raw water. The raw water is treated with water by ion exchange using a water treatment means, removing or reducing impurity components, or removing suspended substances. The water treatment means needs to be regenerated after a certain period of water treatment operation. However, the reclaim operation is performed in one of the water treatment units that require the regenerative operation, and the raw water is passed through the treatment means after the regeneration operation. Prepare to run through drainage branch pipes. In the other water treatment unit, water treatment operation is performed. The treated water after passing through the water treatment means is transferred to the treated water tank or the next process through the treated water pipe and used for drinking water, medical water, or the like.
One and the other treated water pipes are connected to each other so that the treated waters join together , and the transfer to the next process is combined into one pipe, and it is necessary to switch the connection using a conventional joint. Therefore, the configuration is simplified and the operation work is simplified.
That is, when one of the water treatment units is operating, the other water treatment unit is performing a preparatory operation after the regeneration operation of the water treatment means, and includes the treated water (including chemicals or sewage) during the regeneration operation. However, the water pressure of one treated water pipe that is in water treatment operation is higher than the other treated water pipe that is in preparation operation, It is possible to prevent the reclaimed water during the preparation operation from being mixed into the treated water.
Since pipes with different water resistance are provided, water is passed through the pipe with low water resistance during water treatment operation, and water is passed through the pipe with high water resistance during regeneration operation. The water pressure of one of the treated water pipes that are performing the treatment operation can be increased.
Accordingly, the water pressure can be easily adjusted with a simple configuration without using a pump for providing a difference in water pressure, an expensive inverter pump, or the like, and the equipment cost can be reduced.
After the regeneration operation of the water treatment means, the preparatory operation of the same process as the water treatment operation is performed before the water treatment operation, but in the preparation operation, the reclaimed water until the water treatment means is stabilized flows into the drain branch pipe and is drained. . Accordingly, by draining the reclaimed water in the preparatory operation, it is possible to prevent the residual chemical solution from being mixed due to the regeneration process.
[0007]
The invention according to claim 2 is the invention according to claim 1, wherein a water pressure gauge that measures a differential pressure between one treated water pipe and the other treated water pipe, one treated water pipe, and the other treated water pipe, Comprising a valve provided in at least one of the above and a warning means, and issues a warning when the water pressure of one treated water pipe performing water treatment operation is lower than the other water pressure performing preparatory operation And
[0008]
The invention according to claim 2 has the same effect as that of the invention according to claim 1, and a valve is provided in the treated water pipe, and the valve of the treated water pipe is closed during the regeneration operation and the preparation operation. However, it is possible to prevent reclaimed water from entering the treated water pipes that are performing wastewater treatment, but the water treatment operation may be performed due to valve deterioration or damage, or because the valve was not completely closed due to foreign matter, etc. When the water pressure in one treated water pipe is lower than the other water pressure in the preparatory operation, an alarm is issued to call attention. Thereby, the leakage of the reclaimed water from a valve by the difference in water pressure can be prevented, and it can prevent that the reclaimed water of a low water pressure mixes in the high water pressure treated water. The “alarm unit” is not limited as long as it is a unit that emits a sound or lights or blinks a lamp to alert a worker.
[0009]
[0010]
[0011]
The invention according to claim 3 is the invention according to claim 1 or 2, characterized in that the two types of pipes having different water resistance are pipes having different pipe diameters.
[0012]
The invention described in claim 3 has the same effect as that of the invention described in claim 1 or 2, and the water flow resistance is simply provided with a pipe having a different diameter, so that the adjustment of water pressure is simple. Can be.
[0013]
The invention according to claim 4 is the conductivity according to the invention according to any one of claims 1 to 3, wherein the conductivity of the treated water is measured on the downstream side at the junction of the one and the other water treatment pipes. A rate meter is provided.
[0014]
In this invention of Claim 4, while exhibiting the same effect as the invention as described in any one of Claims 1-3, in the downstream from the confluence | merging point of one and the other treated water pipe | tube, electrical conductivity is provided. Since the conductivity of the treated water is measured by the meter, when the reclaimed water is mixed, the measured conductivity changes, so that the regenerated water can be easily detected.
Moreover, not only the mixing of reclaimed water, but also an abnormality of the water treatment means or a foreign substance entering the water treatment apparatus can be easily detected.
If the measured value of the conductivity meter deviates from the target value, there is a high possibility of contamination of reclaimed water or foreign matter, so that an alarm can be sounded to inform the worker of an abnormality in the treated water. desirable. As a result, the worker stops the operation of the water treatment apparatus and checks the valves and pipes. Therefore, high quality treated water can be obtained.
[0015]
The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the chemical solution supply pipe is connected to the treated water pipe and supplies the chemical solution for regeneration to the water treatment means; In addition, two open / close valves provided in series are provided, a branch pipe is provided between the two open / close valves, and an open valve that can be opened to the atmosphere is provided in the branch pipe.
[0016]
In the invention according to claim 5, the same effect as that of the invention according to any one of claims 1 to 4 is achieved, and after supplying the chemical to the water treatment means during the regeneration operation, the water treatment operation is performed. Although the two on-off valves that supply the chemicals are closed, even if the on-off valve on the chemical side does not close completely due to wear, deterioration, or foreign matter, the branch valve is opened, so the chemicals are open. Can be prevented from being discharged from the open valve and mixing the chemical into the treated water pipe.
On the other hand, if the on-off valve on the treated water pipe side is not completely closed, the branch pipe opening valve is opened, so the branch pipe side is under negative pressure, and treatment is possible even if there is a chemical remaining on the branch pipe side. Invasion of chemicals into the water pipe can be prevented.
[0017]
[0018]
[0019]
The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the treated water pipe is a conductivity meter that measures the conductivity of the treated water at a branch part with the branch pipe for drainage. It is characterized by providing.
[0020]
In this invention of Claim 6, while exhibiting the effect similar to the invention as described in any one of Claims 1-5, the electrical conductivity of treated water is made into the predetermined range by the measurement of a conductivity meter. At that point, the completion of the preparatory operation can be confirmed, the drainage branch valve is automatically closed, and the treated water is transferred to the next process. Therefore, the conductivity meter can easily confirm the end of the preparatory operation and can automatically open and close the valve according to the measured value, so that high-quality treated water can be obtained while enabling automatic operation. .
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 4 are schematic piping diagrams of the water treatment apparatus, and show the flow in each operation state.
[0022]
First, piping of the water treatment device 1 according to the present embodiment will be described. The water treatment apparatus 1 includes two water treatment units 3 and 5 in parallel, and one water treatment unit 3 and the other water treatment unit 5 have substantially the same circuit configuration, and each water treatment unit The treated waters 3 and 5 are transferred to and stored in a common treated water storage tank 7. In the following description of the configuration, one water treatment unit 3 will be described, and in the other water treatment unit 5, the same parts as those of one water treatment unit 3 will be denoted by the same reference numerals, and detailed explanations thereof will be given. Although omitted, one water treatment unit 3 is identified by “a” after the number, and the other water treatment unit 5 is distinguished by adding “b” after the number.
[0023]
The raw water pipe 9a is connected to the first water treatment means 11a. The raw water pipe 9a is provided with a valve 13a, and a drainage pipe 15a is connected to the upstream side of the valve 13a. A downstream side of the drainage pipe 15 a is connected to the drainage tank 16. The first water treatment means 11a is an ion exchange tower that exchanges positive ions in the liquid with hydrogen ions through an ion exchange membrane.
An intermediate treated water pipe 17a is connected to the downstream side of the first water treatment means 11a, and a second water treatment means 19a is connected to the downstream side of the intermediate treated water pipe 17a. The intermediate treatment water pipe 17a is provided with a valve 21a on the first water treatment means 11a side, and a large pipe 23a having a small water flow resistance and a narrow pipe having a large water flow resistance between the valve 21a and the second water treatment means 19a. 25a is connected in parallel, and a detour pipe 29a provided with a valve 27a is provided downstream thereof. The thick tube 23a and the thin tube 25a are provided with valves 30a and 31a, respectively.
[0024]
A treated water pipe 35a for transferring treated water is connected to the second water treatment means 19a. A drainage manifold 37a is connected to the treated water pipe 35a, and the drainage manifold 37a is opened and closed by a valve 40a. It has come to be. The drainage manifold 37a discharges the treated water during the preparation operation after the regeneration operation. That is, a conductivity meter 41 is provided at a branch point between the drainage manifold 37a and the treated water tube 35a, and the conductivity of the treated water is measured during the preparatory operation for performing the same treatment as the regeneration operation. After measuring by 41 and confirming that a predetermined conductivity is obtained, the flow of treated water is switched from the branch pipe 37a for drainage to the treated water pipe 35a.
[0025]
The treated water pipe 35a is provided with a valve 43a downstream of the conductivity meter 41 and a differential pressure gauge 45 for measuring the differential pressure between the upstream side and the downstream side of the valve 43a, and the downstream pressure of the valve 43a is large. When this happens, the valve 43a is closed. In other words, since one treated water pipe 35a and the other treated water pipe 35b are connected downstream, when the water pressure of the other treated water pipe 35b that is being regenerated increases, one of the treated water pipes 35a communicates with it. Since the water power of the treated water pipe 35a becomes high, in such a case, there is a risk of reclaimed water entering the treated water, so the lamp or display is turned on or a sound is generated to alert the operator. In some cases, the valve 43a of the treated water pipe 35a that is performing the water treatment operation is closed.
A conductivity meter 47 is also provided on the downstream side of the junction 46 between the one treated water pipe 35a and the other treated water pipe 35b, and if recycled water is mixed from the other treated water pipe 35b that is in the regenerating operation. Can be detected by a conductivity meter 47. In addition, the conductivity meter 47 is also for confirming the final state of treated water entering here just before the treated water storage tank 7.
[0026]
Next, a chemical supply pipe used during the regeneration operation will be described. The acidic tank 49 in which the acidic liquid is stored is connected to the first water treatment means 11a and 11b by the chemical liquid supply pipe 51, and the alkaline tank 53 in which the alkaline liquid is stored is connected to the second water treatment means 19a by the chemical liquid supply pipe 55. , 19b. In the present embodiment, hydrochloric acid water is used as the acidic liquid, and sodium hydroxide water is used as the alkaline liquid.
The chemical solution supply pipes 51 and 55 are provided with two on-off valves 57 and 59 connected in series to the connection portions of the first water treatment means 11a and 11b and the second water treatment means 19a and 19b, respectively, and two open / close valves. A branch pipe 63 is provided between the valves 57 and 59, and an open valve 61 that can be opened to the atmosphere is provided in the branch pipe 63. When the supply of the chemical liquid is stopped, the two on-off valves 57 and 59 are closed. However, even if the on-off valve 59 on the chemical liquid side is not completely closed due to wear, deterioration, foreign matter, or the like, Since the open valve 61 of the pipe 63 is opened, it is possible to prevent the chemical liquid from being discharged from the open valve 61 and mixed into the treated water pipe 35a (or the intermediate treated water pipe 17a). On the other hand, when the valve 57 on the treated water pipe 35a (or intermediate treated water pipe 17a) side is not completely closed, the open valve 61 of the branch pipe 63 is opened. Even if there is a chemical solution remaining on the side, the chemical solution can be prevented from entering the treated water pipe 35a (or the intermediate treated water pipe 17a).
[0027]
Next, operation | movement of the water treatment apparatus 1 in this Embodiment is demonstrated. FIG. 1 shows a case where one treated water unit 3 is performing a water treatment operation and the other water treatment unit 5 is simultaneously performing a regeneration operation. In one treated water unit 3, as shown by the solid arrow in FIG. 1, the raw water supplied to the raw water pipe 9a is subjected to positive ion exchange in the first water treatment means 11a, The treated water is stored in the treated water storage tank 7 through the treated water pipe 17a, the thick pipe 23a, the second water treatment means 19a, the treated water pipe 35a, and the conductivity meter 47.
In the other treated water unit 5, the valves 57 and 59 are opened and the valve 61 is closed. Hydrochloric acid water is supplied to the first water treatment means 11b and alkaline water is supplied to the second water treatment means 19b. The hydrochloric acid supplied to the first water treatment means 11b is discharged to the drainage tank 16 through the raw water pipe 9b and the drainage pipe 15b. The alkali supplied to the second processing means 19b is discharged to the drainage tank 16 through the bypass pipe 29b.
[0028]
In FIG. 2, the treated water operation is continued in one treated water unit 3, and the preparatory operation is performed in the other water treatment unit 5. In the preparation operation, the raw water is allowed to flow to the first water treatment means 11b and the second water treatment means 19b as in the normal water treatment operation (treatment in one water treatment unit 3), but the treated water in the treated water pipe 35b is branched. The water is drained through the pipe 37b. In this preparatory operation, the raw water is poured into the detailed officer 25b, and the treated water pipe 35b measures the conductivity of the treated water with the conductivity meter 41, and the treated water is drained through the branch pipe 37b until a predetermined value is reached. When the rate is reached, the valve 40b is automatically closed and the valve 43b is opened at the same time, and the water treatment operation for transferring the treated water to the treated water storage tank water 7 is performed.
[0029]
FIG. 3 shows a case where one water treatment unit 3 performs a regeneration operation and the other water treatment unit 5 performs a water treatment operation. In the other water treatment unit 5, raw water is passed through the thick pipe 23 b, and the treated water is introduced from the treated water pipe 35 b into the treated water storage tank 7. In one water treatment unit 3, the chemical solution after the first and second water treatment units 11 a and 19 a are regenerated with the chemical solution is discharged to the drain tank 16.
[0030]
In FIG. 4, in one water treatment unit 3, the raw water is supplied to the fine officer 25 a to perform the preparation operation, and in the other water treatment unit 5, the raw water is supplied to the thick tube 23 b and the water treatment operation is continued. Thereafter, one water treatment unit 3 shown in FIG. 1 performs a water treatment operation, and the other water treatment unit 5 performs a regeneration operation. In this Embodiment, the process of FIGS. 1-4 mentioned above is repeated and the continuous water treatment driving | operation is performed.
[0031]
The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the invention. For example, in this embodiment, raw water such as groundwater is treated with drinking water, but water treatment may be performed on a liquid used for lotion or chemicals, and the application is not limited.
The method of differentiating the water pressure between one treated water pipe 35a and the other treated water pipe 35b is not limited to the use of the pipes 23a (23b) and 25a (25b) having different pipe diameters. It may change the water pressure.
Two water treatment units 11a (11b) and 19a (19b) are provided in one water treatment unit 3 (5). However, the number is not limited to this, and may be one or three, and the number is not limited. .
Moreover, the water treatment means 11a (11b) and 19a (11b) are not limited to water treatment by ion exchange, but may be other water treatment such as filtration.
In the embodiment described above, the valves provided in the respective pipes are representative ones, and valves other than this may be provided in the respective pipes.
[0032]
【The invention's effect】
According to the first aspect of the present invention, when one of the water treatment units is operating, the other water treatment unit is performing a regeneration operation of the water treatment means, so that a continuous water treatment operation is possible. . In addition, since the treated water pipe can be shared, the configuration of the apparatus is simple, and work such as disconnection and connection of pipes at the time of operation switching is unnecessary. Moreover, since the water pressure of the one treated water pipe which is performing the water treatment operation is higher than that of the other treated water pipe during the preparation operation, it is possible to prevent the reclaimed water during the preparation operation from being mixed into the treated water.
Further, the water pressure can be changed with a simple configuration, the water pressure can be easily adjusted, and the equipment cost can be reduced.
[0033]
According to the second aspect of the present invention, the same effect as that of the first aspect of the invention can be obtained, and the water in the treated water pipe that is closed during the preparatory operation is not completely closed. When the water pressure in one treated water pipe is lower than the other water pressure in the regenerating operation, an alarm is issued. It can prevent, and it can prevent that the reproduction | regeneration water of a low water pressure mixes in the treated water of a high water pressure.
[0034]
[0035]
According to the invention described in claim 3, while having the same effect as that of the invention described in claim 1, the configuration for adjusting the water pressure is simple.
[0036]
According to the invention described in claim 4, since the conductivity of the treated water is measured as in the invention described in claim 1, mixing of reclaimed water can be easily detected and high-quality treated water is obtained. be able to. Moreover, not only the mixing of reclaimed water but also an abnormality of the water treatment means of the water treatment apparatus or a foreign substance can be easily detected.
[0037]
According to the fifth aspect of the present invention, the same effect as that of the first aspect of the present invention can be obtained, and the on-off valve provided in the chemical solution supply pipe is not completely closed due to wear, deterioration, or contamination of foreign matter. Even if this occurs, the chemical solution can be prevented from entering the treated water pipe.
[0038]
[0039]
According to the sixth aspect of the present invention, the same effect as that of the first aspect of the invention can be obtained, and the end of the preparatory operation can be easily confirmed by the conductivity meter, and the valve can be automatically operated according to the measured value. Since opening and closing can be performed, high-quality treated water can be obtained while enabling automatic operation.
[Brief description of the drawings]
FIG. 1 is a piping diagram of a water treatment apparatus showing a state in which one water treatment unit is in a water treatment operation and the other water treatment unit is in a regeneration operation.
FIG. 2 is a piping diagram of a water treatment apparatus showing a state in which one water treatment unit is in a water treatment operation and the other water treatment unit is in a preparation operation.
FIG. 3 is a piping diagram of a water treatment apparatus showing a state in which one water treatment unit is in a regeneration operation and the other water treatment unit is in a water treatment operation.
FIG. 4 is a piping diagram of a water treatment apparatus showing a state in which one water treatment unit is in a preparatory operation and the other water treatment unit is in a water treatment operation.
FIG. 5 is a diagram for explaining switching of piping in a conventional water treatment apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water treatment apparatus 3 One water treatment unit 5 The other water treatment unit 9 Raw water pipe 11a, 11b 1st water treatment means 19a, 19b 2nd water treatment means 23a, 23b
25a, 25b tubule (pipe with high water flow resistance)
35a, 35b treated water pipes 37a, 37b drainage branch pipes 40a, 40b drainage branch pipe on-off valve 41 conductivity meter (measured at branch of drainage branch pipe)
43a, 43b Valve (Processed water pipe valve)
45a, 45b Water pressure gauge 47 Conductivity meter (measured downstream of the water treatment pipe)
51, 55 Chemical supply pipes 57, 59 On-off valve 61 Atmospheric release valve 63 Branch pipe

Claims (6)

Raw water pipe, water treatment means for treating raw water introduced from the raw water pipe, treated water pipe for transferring treated water after being treated by the water treatment means, a branch pipe for drainage connected to the treated water pipe, and a branch for drainage One water treatment unit and the other water treatment unit having a pipe opening and closing valve, and the one treatment water pipe and the other treatment water pipe are connected to join the treated water to each other. The water treatment unit and the water treatment unit are alternately operated. When one water treatment unit is performing the water treatment operation, the other water treatment unit is performing the regeneration operation of the water treatment means and the preparation operation after the regeneration operation. During the preparatory operation, a water treatment device that opens the open / close valve of the drainage branch pipe to drain the treated water from the drainage branch pipe until the treated water becomes stable,
The conduit of each processing water pipes between one treated water units and other treated water units, Yes two tubes flow resistance is different is provided in parallel, the treated water is passed in while the water treatment operation flows through small tubes of water resistance, by the treated water flows through the large tube hydraulic resistance when are preparing operation, the pressure of one of the process water pipe that a water treatment operation, are preparing operation The water treatment apparatus characterized by making it higher than the water pressure of the other treated water pipe.   A water pressure gauge that measures the differential pressure between the one treated water pipe and the other treated water pipe, a valve provided on at least one of the treated water pipe and the other treated water pipe, and a warning means, and a water treatment operation The water treatment device according to claim 1, wherein an alarm is issued when the water pressure of one of the treated water pipes is lower than the other water pressure during the regeneration operation.   The water treatment apparatus according to claim 1 or 2, wherein the two types of pipes having different water flow resistances are pipes having different pipe diameters.   The water treatment apparatus according to any one of claims 1 to 3, further comprising a conductivity meter that measures the conductivity of the treated water on the downstream side of the connection portion between the one and the other water treatment pipes.   A chemical solution supply pipe connected to the treatment water pipe for supplying a chemical solution for regeneration to the water treatment means and two on-off valves provided in series with the chemical liquid supply pipe are provided, and a branch pipe is provided between the two on-off valves. The water treatment device according to any one of claims 1 to 4, wherein the branch pipe is provided with an open valve that can be opened to the atmosphere.   The water treatment apparatus according to any one of claims 1 to 5, wherein the treated water pipe includes a conductivity meter that measures the conductivity of the treated water at a branch portion with the drainage branch pipe.

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