JP2001137846A - Water softening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive water softening device capable of eliminating the problem of leakage of a hard component. SOLUTION: In this water softening device provided with a water softener 1, a regeneration unit 2 for regenerating a resin in the water softener 1, and a control device 3 for controlling the water softener 1 and the regeneration unit 2, a non-regeneration type polisher 4 is provided in the post stage of the water softener 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water softening device for softening hard water, and more particularly to a water softening device capable of producing soft water at a low cost by making full use of the capacity of a water softener. And a water softener improved so as to surely prevent the water softening.

[0002]

2. Description of the Related Art In general, a water softener is composed of a water softener having a container filled with an ion exchange resin, a regeneration unit having a salt dissolving tank for generating a saline solution for regenerating the water softener, and a water softener. And a controller that controls the flow of raw water (hard water) and saline water into the water softener, and a water softening process in which the raw water flows through the water softener, and the saline water flows through the water softener. The operation is performed so as to alternately perform the step of regenerating the ion-exchange resin therein.

[0003]

In a conventional water softener,
There was a problem of leakage of the hardness component into the treated water due to the following factors in use form or constitution.

[0004] The water softener is generally rarely used in continuous operation, and is often used in intermittent operation. However, when the intermittent operation is restarted, the hardness component deviating from the ion exchange resin during the period in which the device is stopped is stopped. Leaks into the treated water. The pure water system is configured so that the low-quality treated water at the start of operation is not discharged as treated water by, for example, discarding or circulating the water. Because there is no function,
There is a problem of hardness component leakage at the time of restarting operation.

[0005] In regenerating the ion exchange resin of the water softener with saline, poor reproduction occurs due to various factors such as fluctuations in water pressure and a salt bridge, and there is a problem of leakage of a hardness component due to the poor reproduction. For this reason, in a boiler water softener or the like in which the leak of the hardness component is unacceptable even with a small amount, such as installing a plurality of water softeners in parallel or in series,
Although the leak of the hardness component due to poor reproduction is prevented, the provision of a plurality of water softeners in this way causes an increase in the cost of the apparatus. For this reason, in reality, at present, a certain amount of leakage of the hardness component is tolerated, and a large chemical cost is used to prevent the adhesion of the scale due to the hardness component leaked by the chemical treatment.

The present invention solves the above-mentioned conventional problems, and makes it possible to produce soft water at a low cost by making full use of the capacity of a water softener, and to reliably prevent leakage of a hardness component. It is intended to provide a water softener.

[0007]

SUMMARY OF THE INVENTION A water softener according to the present invention comprises a water softener, a regeneration unit for supplying a regeneration liquid to the water softener to regenerate the water, and a soft water production operation for passing raw water through the water softener. And a control device for switching between a regeneration operation and a regeneration operation for regenerating the water softener, wherein soft water from the water softener is taken out through a non-regenerative polisher.

In the water softener of the present invention, since the hardness component leaked from the water softener can be removed by the non-regenerative polisher (non-regenerative cation exchange device), the leak of the hardness component into the treated water is ensured. Can be prevented. In addition, the non-regenerative polisher is relatively inexpensive, and the softening of raw water is mainly performed by a water softener, and the non-regenerative polisher is loaded only when the hardness component leaks from the water softener. No need to change frequently.
Therefore, even if a non-regenerative polisher is provided, the increase in water treatment cost is small.

The water softening device according to claim 2 has means for measuring the flow rate of the treated water in the water softener and a soft water management device for measuring the hardness of the treated water. Can manage water quality.

According to a third aspect of the present invention, in the water softening device, a hardness leak signal is transmitted from the water softening management device to the control device, and the control device regenerates the water softener based on the hardness leak signal. The regeneration of the water softener can be performed by automatic control.

According to a fourth aspect of the present invention, in the water softening device, the measured value of the amount of inflow water into the non-regenerative polisher is input to the soft water managing device. It calculates the replacement time of the regenerative polisher and displays a signal to prompt the replacement of the non-regenerative polisher.It is necessary to recognize the replacement time in advance before the non-regenerative polisher reaches breakthrough. Since the replacement of the non-regenerative polisher can be performed with minimum frequency, the replacement cost of the non-regenerative polisher can be reduced.

According to a fifth aspect of the present invention, there is provided a water softening device for exchanging a non-regenerative polisher from a water softening device to the information managing device via a public line or a dedicated line. A means for notifying the time is provided, and information such as the replacement time is automatically notified to a replacement company of the non-regenerative polisher and the replacement and management of the non-regenerable polisher can be performed smoothly.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system diagram showing an embodiment of the present invention. In the drawing, reference numeral 1 denotes a water softener having an inflow control unit 1A having a plurality of switching valves. 2 is a regeneration unit for dissolving and storing salt in water to regenerate the ion exchange resin of the water softener 1, 3 is a control device for controlling the water softener 1 and the regeneration unit 2 and the control unit 1 </ b> A, 4 is soft water It is a non-regenerative polisher (non-regenerative cation exchange device) into which the treated water of the vessel 1 flows. This non-regenerative polisher has a cation exchange resin inside. The non-regenerative polisher does not perform regeneration by passing a regeneration liquid. 5
Is a flow meter for measuring the amount of water flowing into the non-regenerative polisher 4, 6 is a soft water management device for measuring the hardness of treated water, 7
Is an information management device that is notified of the replacement time of the non-regenerative polisher 4 from the soft water management device 6.

In this water softener, raw water such as well water, city water, industrial water, etc., flows into the water softener 1 from the raw water inflow pipe 11 through the inflow control section 1A of the water softener 1 and the pipe 12, and the water softener The hardness component is removed by the ion-exchange resin filled in the inside 1. The soft water treated by the water softener 1
3. After the water is passed through the non-regenerative polisher 4 via the inflow control unit 1A and the pipe 14, the water is sent to a soft water use place.

According to such a water softener, the hardness component eluted from the ion exchange resin at the start of the operation of the water softener 1 and the hardness component leaked into the treated water due to the poor regeneration of the ion exchange resin, etc. Since it can be removed by the reclaim polisher 4, it is possible to reliably prevent the leakage of the hardness component into the treated water.

A part of the water treated in the water softener 1 and flowing through the pipe 14 is taken from the pipe 16 to the soft water management device 6, and the hardness of the soft water management device 6 is measured by an ion sensor or the like. Then, it is determined whether or not there is a hardness leak. Of the water collected by the soft water management device 6, surplus water is returned from the pipe 17 to the pipe 14. Specifically, a part of the water flowing through the pipe 14 branches from the pipe 14 to the pipe 16 and is returned to the pipe 14 via the three-way water sampling valve 6a and the pipe 17. In the water sampling valve 6a, the pipes 16, 1
A portion of the water flowing through 7 is collected and sent to a hardness sensor 6b as a water sample to measure the hardness component concentration. The water that has come into contact with the hardness sensor 6b is discharged from the pipe 18 as measurement wastewater. The signal of the hardness sensor 6b is input to the calculator 6c. The flow rate signal from the flow meter 5 is also input to the arithmetic unit 6c. The arithmetic unit 6c collects the hardness signal from the water sampling valve 6a based on the flow rate, the hardness component concentration, and the capacity of the water softener 1 which is input in advance. The frequency of sending to the sensor 6b is determined. The calculator 6c controls the water sampling valve 6a according to the determined data. As a result, excessive sampling of the sample is prevented, and only the minimum necessary amount of treated water is collected as the sample.

The arithmetic unit 6c sends a hardness component leak signal to the control device 3 when the hardness component becomes equal to or more than a predetermined value. The computing unit 6c continuously transmits the water volume and hardness data signals to the information management device 7.

When the soft water management device 6 detects a hardness leak from the water softener 1 and the soft water management device 6 sends a hardness component leak signal to the control device 3, the control device 3
By controlling A and the regenerating unit 2, the ion exchange resin in the water softener 1 is regenerated with saline.

This reproduction is performed as follows.
First, impurities and the like accumulated on the surface of the ion exchange resin of the water softener 1 are discharged to the drain pipe 19 by backwashing the raw water, and then, the saturated saline solution is fed into the water softener 1 together with the raw water from the salt water tank built in the regeneration unit 2. The water is introduced and brought into contact with the ion exchange resin of the water softener 1 to separate the hardness component, and the reclaimed waste water is discharged from the drain pipe 19. Further, as an extrusion step, raw water is passed through, and the water softener 1, the pipes 12, 13 and the inflow control unit 1A
The salt solution remaining inside is extruded and discharged from the drain pipe 19. Thereafter, the operation returns to the soft water production operation in which the raw water is circulated in the order of the pipe 12, the water softener 1, and the pipe 13.

In this water softener, the soft water management device 6
When water detects a leak of the hardness component, water containing the hardness component flows out of the water softener 1, but this water is passed through the non-regenerative polisher 4,
After the leaked hardness component is removed, it is taken out of the system, so that only the soft water from which the hardness component has been reliably removed is supplied to the soft water storage tank for storing the treated water of the water softener. In addition, the non-regenerative polisher 4 removes the hardness only when the hardness component leaks from the water softener 1,
The load is small and it can be used for a long time.

In the water softening device shown in FIG. 1, the flow rate of the treated water is measured by the flow meter 5, and the leak amount of the hardness component is measured by the water softening control device 6. The amount of the hardness component adsorbed by the mold polisher 4 can be calculated. By comparing this calculation result with the ion exchange capacity of the ion exchange resin in the non-regenerative polisher 4, the replacement time of the non-regenerative polisher 4 can be calculated. Can be requested.

In this water softener, information on the replacement time of the non-regenerative polisher 4 calculated by the water softener management device 6 is transmitted to the information management device 7 via a public line or a dedicated line.

The information management device 7 preferably includes a display means for displaying the information on the replacement time of the non-regenerative polisher 4 transmitted from the soft water management apparatus 6, a signal processing means, and a storage means. . By installing such an information management device 7 at a management location of a maintenance company such as a non-regenerative polisher replacement company away from the installation location of the water softener, the replacement time of the non-regenerative polisher is automatically set. The trader can be notified and replaced by the trader before the non-regenerative polisher reaches breakthrough. At the same time, this trader can also perform inventory management, delivery management, quality management, and the like based on the past replacement frequency and number of replacements.

In the present invention, the water softening control device 6 includes a means for separating a part of the softened water (processed water) from the water softener 1 from the water supply pipe 14, which has been applied for a patent before the present applicant. It is preferable to employ a soft water management device (Japanese Patent Application No. 11-225476) having the following configuration in a soft water management device having a measuring means for measuring the quality of the separated soft water.

As a means for separating soft water, a sub-pipe branching from the water supply pipe and rejoining the water supply pipe downstream of the branch point, a pump provided in the middle of the sub-pipe, and a discharge pipe of the pump A soft water management device comprising an outlet or an outlet pipe branched from a sub pipe downstream of the outlet, and configured to supply water taken out by the outlet pipe to the measuring means. With such a soft water management device, since a part of the soft water in the water supply pipe is forced to flow through the sub-pipe by the pump, it is necessary to stably collect the soft water regardless of the water pressure in the water supply pipe. Can be. In addition, since the soft water that is excessive in the amount of water to be collected from the extraction pipe is returned from the sub pipe to the water supply pipe, no waste occurs in the soft water.

[0027] A soft water management device configured to purify soft water fractionated by the soft water fractionating means by a purifying means having a filtration membrane such as activated carbon and an MF (microfiltration) membrane and then supply the purified water to the measuring means. With such a soft water management device,
Since the separated soft water is supplied to the measuring means after passing through the purifying means, even if rust chips and ion-exchange resin pieces are mixed in the soft water, these are removed by the purifying means, and errors may occur in the measuring means. Is prevented.

[0028] A soft water management device configured to adjust the temperature of the water separated by the soft water separating unit by the temperature adjusting unit and then supply the adjusted water to the measuring unit. With such a soft water management device, it is possible to prevent a measurement error caused by a temperature difference by supplying soft water having a predetermined temperature to the measuring unit. In this case, it is preferable that the comparative standard solution is supplied to the temperature adjusting means, the temperature of the comparative standard solution is adjusted by the temperature adjusting means, and then supplied to the measuring means. By doing so, the temperature of the comparative standard solution is the same as that of the soft water, and the calibration error can be significantly reduced.

[0029] A soft water management device configured to introduce soft water fractionated by the soft water fractionating means into a water tank open to the atmosphere and to supply water in the water tank to the measuring means. With such a soft water management device, the water separated by the separation means is once introduced into a water tank which is opened to the atmosphere, where bubbles generated from dissolved gas are removed, and then the soft water in the water tank is supplied to the measurement means. Therefore, water quality measurement data with extremely small errors can be obtained. When soft water is introduced into this water tank, the influence of external noise in hardness measurement can be prevented by arranging the outlet of the introduction pipe so that the soft water in the water tank does not directly touch the water tank. In this case, by supplying the water in the water tank to the measuring means with a pump capable of quantitatively supplying water at a constant pressure, measurement errors due to fluctuations in the flow rate and pressure of the measured water can be eliminated.

[0030]

As described in detail above, according to the water softener of the present invention, soft water can be produced at a low cost by maximizing the capacity of the water softener, and the leak of the hardness component can be reduced. The problem can be solved.

According to the water softener of the second aspect, the amount and quality of the treated water can be managed.

According to the water softener of the third aspect, regeneration of the water softener can be performed by automatic control.

According to the water softener of the fourth aspect, the replacement time of the non-regenerative polisher can be known in advance before the non-regenerative polisher reaches a breakthrough. The replacement cost of the non-regenerative polisher can be reduced.

According to the fifth aspect of the present invention, the non-regenerative polisher replacement trader is automatically notified of information such as the replacement time of the non-regenerative polisher and the replacement and management of the non-regenerative polisher is performed. It can be done smoothly.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an embodiment of a water softener of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 softener 2 regeneration unit 3 controller 4 non-regenerative polisher 5 integrating flow meter 6 soft water management device 7 information management device

Claims (5)

[Claims] 1. A water softener, a regeneration unit for supplying a regeneration liquid to the water softener to regenerate, a soft water production operation for passing raw water through the water softener, and a regeneration operation for regenerating the water softener. A water softener having a control device for switching, wherein soft water from the water softener is taken out through a non-regenerative polisher. 2. The water softener according to claim 1, further comprising means for measuring a flow rate of the treated water in the water softener, and a soft water managing device for measuring the hardness of the treated water. 3. The soft water according to claim 2, wherein a hardness leak signal is transmitted from the water softening control device to the control device, and the control device regenerates the water softener based on the hardness leak signal. apparatus. 4. The soft water management device according to claim 2, wherein a measured value of the amount of water flowing into the non-regenerative polisher is input to the soft water management device, and the measured value of hardness of the treated water is input to the soft water management device. A replacement time of the non-regenerative polisher is calculated from the measured flow rate and a signal prompting replacement of the non-regenerative polisher is displayed. 5. A non-regenerative polisher according to claim 4, further comprising an information management device having a display means, a signal processing means, and a storage means, and a non-regenerative polisher from said soft water management device to said information management device via a public line or a dedicated line. Means for notifying a timing.