JPH0938640A - Supplying and processing device of water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-size water supplying and processing device in which backward washing can be performed without interrupting the filtering process. SOLUTION: During normal operation, one filter module of plural filter modules A, B connected parallel one another is separated from another filter module, while compressed air from a compressed air supplying means is supplied to only at least one filter module. The compressed air supply means consists of an air compressor 4 and a filter regulator 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply system which removes dissolved oxygen and trihalomethane contained in a liquid, particularly tap water, by filtering or degassing to prevent generation of red water from a pipe and supply safe water. Regarding a processing device.

[0002]

2. Description of the Related Art In recent years, there has been a tendency for safe water to be required, and red water, various bacteria, turbidity, and the presence of trihalomethane, which is harmful to the human body, have become problems. Against this background, with the aim of supplying safer water,
Various devices are being developed. For example, filtration of red water, bacteria, turbidity, etc. by a hollow fiber membrane, reduction of dissolved oxygen and trihalomethane concentrations by a degassing membrane, and adsorption of trihalomethane by activated carbon.

At present, there are many devices on the market that use these filtering functions, deaeration functions, activated carbon adsorption functions and other functions either individually or in combination. The most popular one is a household water purifier with a filtration function and an activated carbon adsorption function.

In the industrial field, large modules having a filtering function are often used. Recently, there is a water supply treatment device for buildings and condominiums, which has a degassing function to remove dissolved oxygen in water, prevent red rust in pipes, and reduce trihalomethanes. Particulate matter in raw water is removed. Some of these have an activated carbon adsorption function added, but a chlorine addition function is added to obtain the chlorine concentration specified by the Water Supply Act.
Now, in these devices, in order to prevent a reduction in the throughput due to clogging of the filtration module, it is necessary to either replace the filtration module or reuse it by backwashing.

[0005]

Conventionally, in order to replace a filtration module without interrupting filtration, a plurality of filtration modules are used and the flow path of the used module is changed to replace the module. However, the labor and cost for replacing the filtration module are unavoidable and are a heavy burden. In order to backwash the filtration module while continuing the water supply without interrupting the filtration, a water storage tank is installed after the filtration module to store the purified water in advance, and the filtration that is there during the backwashing of the module. Although it is a water storage tank system that supplies water, it is necessary to provide a tank space, which has been a problem as an obstacle to downsizing of the device.

There has been a long-awaited demand for a small water supply apparatus which can carry out backwashing without interruption of filtration and has no water storage tank. Therefore, an object of the present invention is to provide a small-sized water supply treatment device that can perform backwashing without interrupting filtration work.

[0007]

In order to achieve the above object, the present invention removes one filtration module from parallel connection with another filtration module among a plurality of filtration modules connected in parallel during normal operation. And, the compressed air from the compressed air supply means is supplied only to at least one backwashing filtration module.

That is, according to the present invention, a plurality of filtration modules for filtering water, means for connecting the plurality of filtration modules in parallel, and at least one of the plurality of filtration modules for backwashing Backwash mode setting, in which compressed air supply means and the at least one filtration module are disconnected from parallel connection with another filtration module, and compressed air from the compressed air supply means is supplied only to the at least one filtration module And a means for supplying water.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a water supply treatment apparatus of the present invention will be described in detail with reference to the drawings by way of preferred embodiments. FIG. 1 is a flowchart showing the overall structure of the water supply treatment device according to the present invention. The water supply treatment device main body includes a filtration unit 2 and a deaeration unit 3. IN is an inlet for water connected to a water pipe or the like, and OUT is an outlet for purified and deaerated fresh water. The filtration unit 2 includes an air compressor 4, a filter regulator 5, a backwash extrusion valve 6,
7, backwash bubbling valve 8, 9, backwash drain discharge valve 1
0, 11, water flow switching valves 12, 13, water flow switching valves 14, 15, and filtration modules A, B. The degassing unit 3 has water flow switching valves 18 and 19, a degassing module 20, and a degassing pump 21.

The lower side of each of the filtration modules A and B is the inlet side, and the upper side is the outlet side. The water flow switching valves 12 and 13 provided on the inlet side of each filtration module A and B are connected on the upstream side, and the receiving port IN is connected to a water supply line such as a water pipe (not shown). In addition, each filtration module A, B
The water flow switching valves 14 and 15 provided on the outlet side of the are connected to the degassing module 20 via the valve 18 connected on the downstream side thereof. The connection provided on the upstream side of the water flow switching valves 12, 13 and the connection provided on the downstream side of the water flow switching valves 14, 15 are the filtration modules A, B when the respective valves 12, 13, 14, 15 are open. Of the parallel connection of the above.

The air compressor 4 and the filter regulator 5 are combined to form a compressed air supply means. That is,
When the pressure of the filter regulator 5 becomes equal to or lower than a certain value, the air compressor 4 automatically operates, and the pressure of the filter regulator 5 is always kept near a predetermined value. The backwash extrusion valve 6, the backwash bubbling valve 8, and the backwash drain discharge valve 10 are provided for the filtration module A, while the backwash extrusion valve 7, the backwash bubbling valve 9, and the backwash are provided. Drain drain valve 11 is provided for the filtration module B. That is, regarding the filtration module A, the backwash extrusion valve 6 is provided between the filter regulator 5 and the outlet side of the filtration module A, and the backwash bubbling valve 8 is provided between the filter regulator 5 and the inside of the filtration module A. A drain drain valve 10 for backwashing is provided between the inlet side and the outside of the filtration module A for drainage. The same applies to the filtration module B.

First, the filtering operation of the water supply treatment apparatus according to the present invention will be described. At the time of normal water supply, tap water is introduced by opening the backwash water flow switching valve 12, the backwash water flow switching valve 14, or the backwash water flow switching valve 13, and the backwash water flow switching valve 15, and then the filter module A or the filtration module A or the filtration unit A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module A or the filtration module The filtering operation is performed in module B.

Next, the backwash operation will be described. If the filtration module A or filtration module B during filtration is clogged, the water flow switching valves 12, 14 or the water flow switching valve 1
3, 15 are closed, the filtration module A or B is switched to the backwash operation, and the water flow switching valves 13, 15 or the water flow switching valves 12, 14 are opened to filter the filtration module A or B.
Is switched to the filtration operation.

Here, the operation at the time of backwash will be described in detail. First, the water flow switching valves 12, 14 or the water flow switching valves 13, 15 of the filtration module A or the filtration module B to be backwashed are closed. Next, the backwashing extruding valve 6 or 7 is opened, and the filtering module A or B is driven by the compressed air supplied from the air compressor 4 and passed through the filter regulator 5.
Pressure is applied to the outlet side of the filtered water in (1) to extrude the substance causing the clogging. Further, the backwash bubbling valve 8 or 9 is opened, and the clogging material is shaken off by bubbling with compressed air.
The backwash bubbling valves 8 and 9 are opened with a time delay after opening the backwash extrusion valves 6 and 7. Then, the high-concentration contaminated water generated by the backwash is discharged outside the filtration module A or B by opening the backwash drain discharge valve 10 or 11. FIG.
Open and close each valve, air compressor (motor) 4 and filter
The operation of the regulator 5 and the pump 21 during normal operation (both filtration modules A and B are filtering operations)
3 is a table separately showing the back washing of the filter module B and the back washing of the filtration module B.

By repeating the filtration and backwashing operations as described above, the backwashing of the filtration module becomes possible during the continuous filtration operation of the feed water treatment apparatus without providing a water storage tank. The tap water filtered by the filtration unit 2 is sent to the degassing unit 3, where it is degassed by the degassing module 20 and the degassing pump 21, and after the dissolved oxygen and trihalomethane concentrations in the filtered water are reduced, it goes out of the apparatus. Supplied.

The backwashing of the filtration module A and the filtration module B can be performed, for example, at regular intervals with regular intervals. FIG. 3 shows a mode in which each filtration module A or filtration module B has a cycle of normal filtration for 30 minutes and backwashing for 10 minutes for a total of 40 minutes, and the filtration module A and the filtration module B are alternately in the backwashing mode. It is a time chart. As can be seen from FIG. 3, in this example, t1, t2, t3, t4. . . The time interval is 10 minutes.

In order to control the water supply treatment device of FIG. 1 in the manner shown in FIG. 3, for example, a control device as shown in FIG. 4 is used. This control device includes an operation panel 30 and a control circuit 3.
Two. The operation panel 30 has a power switch 30
A, a normal operation switch 30B, a module A backwash switch 30C, a module B backwash switch 30D, and an automatic backwash switch 30E are provided, and any one of 30B to 30E to be switched is selected according to the user's request. A signal indicating the selected mode is given to a control circuit 32 having a CPU (Central Processing Unit) RAM, ROM, I / F (interface) and the like. The CPU sends a control signal to each valve or motor of the water supply treatment apparatus of FIG. 1 in order to execute the control shown in FIG. 2 in the mode given from the operation panel 30 in accordance with the processing program stored in advance in the ROM. send.

FIG. 5 is a flow chart showing an example of the operation of the CPU. When the power is turned on, the stored contents of the RAM and registers (not shown) are cleared or initialized in step S1. In step S2, a driving instruction given from the operation panel 30, that is, a mode is read. Step S3
Determines whether or not the normal operation, that is, the mode for performing the filtering operation in the state where the two filtering modules A and B are connected in parallel is instructed. If YES, normal operation is performed in step S10. On the other hand, if NO, it is determined in step S4 whether the mode is the temporary backwash mode. What is temporary backwash mode? Module A
Backwash switch 30C or module B Backwash switch 30
When any one of D is operated, only the corresponding filtration module is backwashed only once. Step S5,
One of the modules A and B is backwashed by S6 and S7. Steps S8 and S9 are for ending the backwash and returning to the normal filtration when the backwash time t exceeds 10 minutes.

In step S11, it is determined whether the elapsed time T from the start of normal operation in step S10 exceeds 10 minutes. After 10 minutes, step S12
Then, it is determined whether or not the automatic cleaning (backwashing) mode of the switch 30E is instructed. If YES, step S1
3, S14, S15, S16, S17, S18 are executed and the alternate backwash mode shown in FIG. 3 is entered.

Although the number of the filtration modules is two in the above embodiment, the number of the filtration modules may be three or more. In this case, it is preferable to carry out the backwashing sequentially. Further, the backwashing time and the time interval thereof can be arbitrarily adjusted according to the performance and dirt of the filtration module. Further, a means for detecting the flow rate, a means for detecting the degree of contamination of the filtration module are provided, and backwashing is automatically started in response to these detections, or the backwashing time and its time interval are changed. be able to.

[0021]

The water treatment apparatus according to the present invention can be downsized as compared with the conventional water treatment apparatus because there is no water storage tank after the filtration module. Moreover, it is possible to backwash the filtration module during the continuous filtration operation without providing a water storage tank. Further, since dissolved oxygen and trihalomethane contained in tap water can be removed by deaeration, generation of red water from the pipe can be prevented and safe water can be supplied.

[Brief description of drawings]

FIG. 1 is a flow chart of a preferred embodiment of a water supply treatment device according to the present invention.

FIG. 2 is an opening / closing of each valve in FIG. 1 and an air compressor 4 (motor).
2 is a table showing the operations of the filter regulator 5 and the pump 21 separately during normal operation (both filtration modules A and B perform a filtering operation), during backwashing of the filtration module A, and during backwashing of the filtration module B.

FIG. 3 is a time chart showing an automatic backwash mode of the filtration modules A and B shown in FIG.

FIG. 4 is a block diagram showing an example of a control device for controlling the water supply treatment device of FIG. 1.

5 is a flowchart showing an operation example of a CPU in the control device of FIG.

[Explanation of symbols]

1 Main body of water supply treatment device 2 Filtration unit 3 Degassing unit 4 Air compressor 5 Filter regulator (composing compressed air supply means together with air compressor) 6, 7 Backwash extruding valve 8, 9 Backwash bubbling valve 10 , 11 Drain discharge valve for backwash 12, 13, 14, 15, 18, 19 Water flow switching valve 20 Deaeration module 21 Deaeration pump 30 Operation panel 30A Power switch 30B Normal operation switch 30C Module A backwash switch 30D Module B reverse Wash switch 30E Automatic backwash switch 32 Control device A, B Filtration module IN Water inlet OUT Out fresh water outlet

Front Page Continuation (72) Inventor Masanori Ito 4-chome, Sunadabashi, Higashi-ku, Nagoya, Aichi Prefecture 60-1 Product Development Laboratory, Mitsubishi Rayon Co., Ltd. (72) Masatoshi Kamada 4-chome, Sunadabashi, Higashi-ku, Aichi Prefecture Mitsubishi Rayon Co., Ltd. Product Development Laboratory

Claims (6)

[Claims] 1. A plurality of filtration modules for filtering water, a means for connecting the plurality of filtration modules in parallel, and a compressed air supply means for backwashing at least one of the plurality of filtration modules. A backwash mode setting means for disconnecting the at least one filtration module from parallel connection with another filtration module and for supplying the compressed air from the compressed air supply means only to the at least one filtration module. Water treatment equipment. 2. The backwash mode setting means is provided between the water flow switching valve provided on the inlet side and the outlet side of the at least one filtration module, and between the compressed air supply means and the outlet side of the at least one filtration module. The water supply treatment apparatus according to claim 1, further comprising a backwashing extrusion valve provided in the backwashing drainage valve, and a backwashing drain valve provided between the inlet side and the outside of the at least one filtration module. 3. The water treatment apparatus according to claim 2, wherein the backwash mode setting means further includes a backwash bubbling valve provided between the inside of the at least one filtration module and the compressed air supply means. 4. The water supply treatment apparatus according to claim 1, further comprising a deaeration unit provided on the outlet side of the plurality of filtration modules and at a stage subsequent to the parallel connection unit. 5. A means for instructing an automatic cleaning mode, and, when the automatic cleaning mode is instructed, reverses the at least one filtration module until a predetermined time or a predetermined condition is satisfied for the backwash mode setting means. 5. The water supply treatment apparatus according to claim 1, further comprising control means for sending a control signal for repeatedly performing the backwash at predetermined time intervals or under predetermined conditions after washing and backwashing. 6. A means for instructing a temporary cleaning mode, and when the temporary cleaning mode is instructed, the at least one filtration module is reversed until a predetermined time or a predetermined condition is satisfied for the backwash mode setting means. 6. A control means for sending a control signal for washing, further comprising:
The water supply treatment device according to any one of 1.