JP2776280B2 - Regeneration method of filtration device - 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 regenerating a filtration device for filtering industrial water and the like.

[0002]

2. Description of the Related Art Conventionally, a filtration apparatus for filtering industrial water or the like has been frequently used in a fully automatic manner. Therefore, regeneration of this fully automatic filtration device (backwash and drain the filter media)
Is periodically performed by a preset calendar timer or the like. Therefore, even if the amount of treated water is small, the water is automatically regenerated after a predetermined number of days or a predetermined time has elapsed, and water used for the reproduction is wasted. In addition, there is a problem in that the filter medium is reduced or run out during regeneration.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a regeneration method for efficiently regenerating a filtration device.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to regenerate a filtration device disposed in a water supply line between a raw water supply section and a treated water supply / distribution section. In the method for measuring the integrated value of the flow rate of water supplied from the raw water supply unit to the treated water supply and distribution unit, when the integrated flow value reaches a preset flow value, the method of regenerating the filtration device, The preset flow rate value is sequentially reduced based on the number of regenerations of the filtration device, and an alarm is issued when the number of regenerations reaches a preset number of times.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, a filtration device 4, a solenoid valve 5, and a water supply line 3
The deaerator 6 and the integrating flow meter 7 are sequentially arranged. As shown in FIG. 2, the filter device 4 includes a can body 9 filled with a predetermined amount of a filter medium 8 (for example, anthracite, sand, or the like).
A flowing water pipe 12 provided with an upper collecting pipe 10 and a lower collecting pipe 11 provided in the can body 9; a raw water inlet 13, a filtered water outlet 14, and a drain outlet 1 communicating with the flowing water pipe 12;
Control valve 1 for switching each flow path of 5
It consists of six. In the water passing step of the filtration device 4, the control valve 16 is operated to feed the raw water from the water supply line 3 into the can 9 via the raw water inlet 13, the flowing water pipe 12 and the upper collecting pipe 10. Let in
Water is passed through the filter layer (not numbered) formed by the filter medium 8 as a downward flow, and the lower collecting pipe 11 and the flowing water pipe 1
The water flows from the filtered water outlet 14 into the water supply line 3 through the water supply line 3. The control valve 16, the solenoid valve 5, the deaerator 6 and the integrating flow meter 7 are
Each is connected to a controller (not shown) provided with an alarm device via a line (not shown).

The regeneration of the filtration device 4 comprises three steps of backwashing, standing, and water washing. First, in the backwashing step, the electromagnetic valve 5 is closed, the control valve 16 is operated, and the raw water inlet 13 is operated. As shown in FIG. 3, raw water having a predetermined amount is passed through the filter layer (symbols omitted) through the flowing water pipe 12 and the lower collecting pipe 11 in an upward flow, and the filter medium 8 is loosened. The suspended matter accumulated inside is discharged from the drain outlet 15 to the outside of the system through the upper collecting pipe 10.
In the next stationary step, the supply of the raw water is stopped for a predetermined time by operating the control valve 16, and the filter medium 8 floated by backwashing is allowed to settle naturally. In the next washing step, the control valve 16 is operated to discharge a predetermined amount of raw water from the raw water inlet 13 through the flowing water pipe 12 and the upper collecting pipe 10, as shown in FIG. Through a downward flow, and the turbidity remaining in the filter layer is discharged from the drain outlet 15 to the outside of the system through the lower collecting pipe 11. As described above, regeneration of the filtration device 4 requires a large amount of water and processing time.

The degassing device 6 is provided in the water supply line 3 for degassing water supplied to cooling and heating equipment such as a boiler, a water heater or a cooler, and for preventing corrosion of the equipment. . That is, as shown in FIG. 1, the deaerator 6 has a configuration in which a deaeration module 17 is connected to the water supply line 3 and a vacuum pump 19 is connected to the deaeration module 17 via a vacuum suction path 18. ing. Then, raw water is passed through the degassing module 17, and in this water passing process, the inside of the degassing module 17 is evacuated by the vacuum pump 19 to degas and remove gas contained in the raw water. is there.

In this embodiment, as a means for integrating the amount of supplied water according to the present invention, the integrated flow meter 7 is disposed downstream of the deaerator 6. The integrating flow meter 7 also has a function of a flow sensor, detects the flow of water in the water supply line 3, and drives the vacuum pump 19 via the controller (not shown) according to the detection signal. I do. And
The amount of water to be supplied to the treated water supply / distribution unit 2 by integrating the water treated by the filtration device 4 and the deaerator 6 is integrated, and when the flow reaches a preset flow rate set value, this is reported to the controller. The means for integrating the water supply amount is not limited to the integrating flow meter 7, but may be changed as appropriate according to the implementation. For example, a control device (not shown) incorporated in the deaerator 6 ), The degassing module 17
It is configured to input the amount of treated water and the treatment time passed through, and the integrated treatment water amount is calculated by the control device, and when the flow amount reaches a preset flow value, the structure is notified to the controller. It is suitable.

Reference numeral 20 in FIG. 1 denotes a pressure reducing valve for preventing a supply water pressure of a predetermined level or more from being applied to the degassing module 17 to prevent the degassing module 17 from being damaged. Reference numeral 21 denotes a bypass line provided in the water supply line 3 for avoiding water cutoff at the time of regeneration or failure of the filtration device 4, and an electromagnetic valve 22 is provided on the way.

Next, a method for regenerating the filtration device according to the present invention will be described. In the process of passing the raw water from the raw water supply unit 1 through the filtration device 4 and the deaeration device 6 and supplying water to the treated water supply and distribution unit 2, the integrating flow meter 7 integrates the water supply amount, and the integrated flow value is set in advance. When the set flow rate value is reached, the electromagnetic valve 5 is closed, the filter 4 is regenerated, and after the regeneration is completed, the electromagnetic valve 5 is opened to allow water to flow. Then, as shown in FIG. 5, the preset flow rate value is sequentially reduced based on the number of regenerations of the filtration device 4, and when the number of regenerations reaches a preset number of regenerations (for example, five times), An alarm is issued by a buzzer or the like provided in a controller (not shown), the electromagnetic valve 5 is closed, and water supply from the raw water supply unit 1 is stopped.
This alarm is for notifying the maintenance time such as the inspection of the filter medium 8 of the filtration device 4. Further, if the set flow rate value is sequentially reduced based on the number of times of regeneration, the regenerating power is reduced due to deterioration, outflow, etc. of the filter medium 8 due to regeneration. It is.

[0011]

As described above, according to the present invention, even when the amount of treated water is small, the regeneration step is not simply performed regularly even when the amount of treated water is small, and waste of water to be used and outflow of filter media are eliminated. Can be prevented. Further, since the set flow rate value is reduced based on the number of times of regeneration, the filtration capacity can be maintained for a long period of time, and when the number of times of regeneration reaches a predetermined number of times, an alarm is issued and maintenance can be appropriately performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing the arrangement of a filtration device embodying the present invention and each device.

FIG. 2 is an explanatory view showing a water flow step of the filtration device of FIG.

FIG. 3 is an explanatory view showing a backwashing step of the filtration device of FIG. 1;

FIG. 4 is an explanatory view showing a water washing step of the filtration device of FIG. 1;

FIG. 5 is an explanatory diagram showing a relationship between the number of times of regeneration of the filtration device of FIG. 1 and a set flow rate value.

[Explanation of symbols]

 Reference Signs List 1 Raw water supply unit 2 Treated water supply and distribution unit 3 Water supply line 4 Filtration device

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B01D 35/14-35/157 B01D 37/04 B01D 61/00-71/82 C02F 1/28 C02F 1 / 42-1/44

Claims (1)

(57) [Claims] 1. In regeneration of a filtration device 4 disposed in a water supply line 3 between a raw water supply unit 1 and a treated water supply and distribution unit 2 ,
The flow rate of water supplied from the raw water supply unit 1 to the treated water supply and distribution unit 2
The integrated flow rate is measured, and this integrated flow rate
When the value reaches the value, a method for regenerating the filtration device 4 is used.
The preset flow rate value is used for the regeneration
Number, and the number of views
A method for regenerating a filtration device, comprising issuing an alarm when a set number of times is reached .