JP5089720B2 - Water treatment equipment - Google Patents

Description

  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.

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.

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.

  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.

The invention according to claim 1 includes one and the other water having a raw water pipe, a water treatment means for treating raw water introduced from the raw water pipe, and a treated water pipe for transferring treated water after being treated by the water treatment means. One treatment water pipe and the other treatment water pipe are connected to each other, and one water treatment unit and the other water treatment unit alternately perform water treatment operation, and one water treatment unit A water treatment device that regenerates water treatment means in the other water treatment unit during treatment operation, and measures the conductivity of the treated water downstream of the connection part of one and the other treated water pipe. comprising a first conductivity meter, the water treatment unit, a connected drainage branch pipe to the processing water pipe, opening and closing valve of the drain branch pipes, it is provided to the connecting portion of the drain branch pipe a process water pipe process of With a second conductivity meter to measure the conductivity of water In the preparatory operation after the regeneration operation, the raw water is poured into the water treatment means in the same manner as the water treatment operation, and the treated water is poured into the drain branch until the treated water is stabilized based on the measurement of the second conductivity meter. characterized in that it.

The invention according to claim 2 is the invention according to claim 1, in which two types of pipes having different water resistance are provided in the pipes of the water treatment means of one treated water unit and the other treated water unit. When the water treatment operation is performed, the raw water flows through a pipe having a low water flow resistance, and during the preparatory operation, the raw water flows through a pipe having a high water flow resistance. The water pressure of one of the treated water pipes is higher than the water pressure of the other treated water pipe that is performing the preparatory operation.

According to the first aspect of the present invention, the two water treatment units are alternately operated in water treatment to continuously treat the raw water, but on the downstream side of the connection portion of one and the other treated water pipes, Since the conductivity of the treated water is measured by the first conductivity 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 first conductivity meter deviates from the target value, there is a high possibility of mixing recycled water or foreign matter, so that an alarm is sounded to inform the worker of the treated water abnormality. It is 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.

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. However, in the preparation operation, the treated water until the water treatment means is stabilized cannot be used as treated water. Drain through a branch pipe. Therefore, by mixing the treated water in the preparation operation, it is possible to prevent the residual chemical solution from being mixed due to the regeneration process.

The end of the preparation operation can be confirmed when the conductivity of the treated water reaches a predetermined range by the measurement of the second conductivity meter . Accordingly, it is possible to easily confirm the end of the preparation operation by the second conductivity meter.

According to the second aspect of the present invention, the same effect as that of the third aspect of the invention can be obtained, and the water pressure of one of the treated water pipes performing the water treatment operation is the other during the preparation operation. Since the water pressure is higher than that of the treated water pipe, 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.

It is a piping diagram of the water treatment apparatus which shows the state in which one water treatment unit is performing water treatment operation, and the other water treatment unit is performing regeneration operation. It is a piping diagram of the water treatment apparatus which shows the state in which one water treatment unit is performing water treatment operation, and the other water treatment unit is performing preparation operation. It is a piping diagram of the water treatment apparatus which shows the state in which one water treatment unit is carrying out regeneration operation and the other water treatment unit is carrying out water treatment operation. It is a piping diagram of the water treatment apparatus which shows the state in which one water treatment unit is performing preparatory operation and the other water treatment unit is performing water treatment operation. It is a figure explaining switching of piping in the conventional water treatment apparatus.

  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.

  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.

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.

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, the second conductivity meter 41 is provided at the branch point between the drainage manifold 37a and the treated water pipe 35a, and the conductivity of the treated water is changed during the preparatory operation for performing the same process as the regeneration operation . After measuring with the 2 conductivity meter 41 and confirming that the predetermined conductivity is obtained, the flow of the treated water is switched from the branch pipe 37a for drainage to the treated water pipe 35a.

The treated water pipe 35a is provided with a valve 43a downstream of the second 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. When is increased, 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 first 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 the recycled water is mixed from the other treated water pipe 35b that is in a regenerating operation. In this case, the first conductivity meter 47 can detect it. The first conductivity meter 47 is also for confirming the final state of treated water entering here just before the treated water storage tank 7.

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).

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 first 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.

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 flows into the detailed officer 25b, and the treated water pipe 35b measures the conductivity of the treated water with the second conductivity meter 41, and the treated water is drained through the branch pipe 37b until a predetermined value is reached. When the electrical conductivity 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.

  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.

  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.

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.

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 Thick pipe (pipe with small water flow resistance)
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 second conductivity meter (conductivity meter provided for connection between water treatment pipe and drainage branch pipe)
47 1st conductivity meter (conductivity meter provided downstream of the connection part of water treatment pipes)
51, 55 Chemical supply pipes 57, 59 On-off valve 61 Atmospheric release valve 63 Branch pipe

Claims (2)

One of the water treatment units includes a raw water pipe, a water treatment means for treating raw water introduced from the raw water pipe, and a treated water pipe for transferring treated water after being treated by the water treatment means. The water pipe and the other treated water pipe are connected to each other. When 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 water treatment unit is a water treatment device that performs regeneration operation of water treatment means,
On the downstream side of the connection portion of one and the other treated water pipe , a first conductivity meter for measuring the conductivity of the treated water is provided,
Each of the water treatment units is provided at a drainage branch pipe connected to the treatment water pipe, an on-off valve of the drainage branch pipe, and a connection portion between the treatment water pipe and the drainage branch pipe to measure the conductivity of the treated water. In the preparatory operation after the regeneration operation, the raw water is poured into the water treatment means in the preparatory operation after the regeneration operation, and the drainage branch pipe is placed until the treated water is stabilized based on the measurement of the second conductivity meter. A water treatment apparatus for draining by flowing treated water . Two types of pipes having different water resistance are provided in the pipes of each water treatment means of one treated water unit and the other treated water unit, and the raw water is subjected to the water resistance when the water treatment operation is performed. When the preparatory operation is carried out, the raw water flows through the pipe with a high resistance to water flow, so that the water pressure of one of the treated water pipes in the water treatment operation is changed to the other treatment in the preparatory operation. The water treatment apparatus according to claim 1 , wherein the water pressure is higher than a water pressure of the water pipe.

Images