JPH0410954Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a water softening device, and more specifically, to a water softening device for industrial and household use using a circulation regeneration method.

[Conventional technology]

It is known to perform chemical treatments and ion exchange to remove scale-causing calcium and magnesium ions from hard water or replace them with more soluble sodium ions (water softening).

[Problem that the invention attempts to solve]

Conventionally, when using an ion exchange resin, regeneration of the ion exchange resin (hereinafter simply referred to as resin) involves adding a regenerating agent from the top of the resin cylinder while maintaining a constant concentration, and allowing the resin to come to a standstill at a constant rate. The inside was lowered and regeneration was performed sequentially from the top.

Such regeneration is a process that requires a long time, and since the size of the resin particles is irregular, there is a problem that small particles are embedded between large particles, reducing the effect of contact with the regenerant and reducing the regeneration effect.

Conventionally, a method has been used in which a 10% regenerant solution is sent together with a certain amount of water using an ejector.For example, in household water softeners, the regenerant is poured into the top of a resin cylinder, and the solution flows in from the top and is discharged from the bottom. However, due to structural reasons, a discharge port is not provided at the bottom of the resin cylinder, so some resins do not come into contact with the regenerant, and the water flow distance between the water supply pipe and drainage pipe is short, so the shortest flow path for the solution is There is a problem in that the regenerant solution flows out without being able to undergo ion exchange.

A problem with medium-sized water softeners is that it takes time to extrude the regenerant that collects in the lower part and remains on the bed.

The present invention was created to solve this problem, and its purpose is to provide a device that efficiently regenerates resin in a short time.

[Means for solving problems]

The attached drawing is a diagram of an embodiment of the present invention. In the drawing, 11 is a resin cylinder, 12 is a regenerant cylinder, 13 is a pressure gauge, 14 is an instantaneous flow meter, 15 is a first switching valve, 16 is a branch pipe, and 17 is a Water collecting pipe, 18 is a union, 19 is a resin grain, 20 is a lid, 21 is a netted spire, 22 is a perforated plate with a screen, 23 is a regenerating agent adjustment valve, 24 is a second
The switching valve 25 is a drain valve.

In the present invention, the regenerating agent is blown up from the entire surface below the resin cylinder 11 at a predetermined flow rate, the regenerating agent is circulated in the resin cylinder together with the ion exchange resin, and the regenerating agent is brought into uniform contact with the surface of the resin. A configuration is adopted for efficient reproduction.

[Effect]

In the above-mentioned device, a certain concentration of regenerant is circulated in the resin by suppressing the flow rate of the regenerant blown up from the entire bottom surface of the cylinder within a predetermined range.
By uniformly contacting the resin, the resin can be efficiently regenerated in a short time.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Conventional water softeners sample soft water from above or below a resin cylinder filled with resin, but the ion exchange zone is a well-established concept, and when water is supplied from above, the resin is pressed down by water pressure. In the case of downward water supply, it is said that it must be crimped to form a resin layer. However, with these methods, the amount of soft water extracted after regeneration is small, and the inventor of the present invention arrived at the present invention after repeated experiments.

The attached drawing is a diagram for clearly showing the internal structure with the exterior cover removed.

In the illustrated example, six resin cylinders 11 are arranged in one row, but the number and rows of resin cylinders can be increased or decreased depending on the amount of water to be sampled or the width of the installation location, and the degree of freedom in designing the installation shape can be increased. It has a simple structure. To increase the number of rows, arrange an arbitrary number of rows of the illustrated resin cylinders in the vertical direction of the page, and connect the branch pipes 16 and water collection pipes 1 of each row.
7 will be standardized together. Each resin cylinder 11 has a union 18
If one of them becomes damaged, for example, it can be removed and replaced with a new one.

In the present invention, approximately 75% of the capacity of the resin cylinder 11 is filled with resin particles 19 to create a space for rolling the resin particles. In the figure, only one of the six resin cylinders is shown in cross section to show the internal structure, but the other five resin cylinders have the same internal structure.

During regeneration, after removing the lid 20 and adding a predetermined amount of regenerating agent, the first switching valve 15 is set to "regeneration" and water is taken in the direction of the arrow marked with water intake, until the instantaneous flow meter reads 0.2 m ³ /h. Adjust with the regeneration adjustment valve as shown, and set the second switching valve to drain. This is because the regenerant adjustment valve adjusts the flow rate as the resin rolls, and if the flow rate is high, it will press upward.

The regenerant melts and reaches the resin cylinder 11 from the netted spire 21 through the branch pipe 16, and the resin particles are rolled in a uniform state within the resin cylinder 11, and the regenerant performs ion exchange while contacting the resin surface. Therefore, the efficiency of ion exchange is improved. Drainage is carried out in the direction of the arrow marked with the word "drainage" by means of a switching valve connected to the water collection pipe 17.

After discharging the predetermined regenerant, the adjustment valve 23
is closed, and the first switching valve 15 and the second switching valve 24 connected to the water collection pipe are set to "soft water".

When taking soft water, the first switching valve 15 is set to the soft water process, and the water taken in the same manner as above is passed through the lower branch pipe 16 through the screen provided at the bottom of the resin tube 11 to prevent the resin particles from flowing out and to maintain its strength. The resin particles 19 flow from the entire bottom surface of the #120 to #160 screened perforated plate 22, and as the water level rises, most of the resin particles 19 are empty. , water from the resin cylinder 11 passes through the water collection pipe 17 and the second switching valve 24, and is collected in the direction of the arrow labeled soft water.

Impurities in water pipes, such as solid matter such as iron rust,
Since the flow velocity of sand grains and the like inside the flow pipe 16 and the resin cylinder 11 is low, they accumulate on the screened perforated plate 22 and the bottom of the flow pipe 16. Then, the drain valve 25 is opened and the water is discharged in the direction of the arrow marked with the word "discharge".

[Effect of idea]

As described above, according to the present invention, the ion exchange resin in the water softener can be regenerated more reliably in a shorter time than in the conventional example.

[Brief explanation of the drawing]

The accompanying drawings are illustrations of embodiments of the present invention. In the figure, 11 is a resin cylinder, 12 is a regenerant cylinder, 13 is a pressure gauge, 14 is an instantaneous flow meter, 15 is a first switching valve, 16 is a branch pipe, 17 is a water collection pipe, 18 is a union, and 19 is a resin particle. , 20 is the lid, 21 is the netted spire,
22 is a perforated plate with a screen, 23 is a regenerant adjustment valve, 24 is a second switching valve, and 25 is a drain valve.

Claims (1)

[Claims for Utility Model Registration] (1) Ion-exchange resin particles are rollably housed inside, and the lower and upper ends are connected to the diverter pipe 16 and the water collection pipe 17 through screened perforations 22, respectively. A regenerant cylinder 12 is provided with a rope spire 21 inside, and a regenerant cylinder 12 whose bottom part is connected to a branch pipe 16 via a regenerant adjustment valve 23. The connected first switching valve 15 for water intake can be switched between "regeneration" and "water softening process", and the second switching valve 24 connected to the water collection pipe 17
A water softening device is capable of switching between draining a regenerant solution and draining softened water. (2) The device according to claim 1, wherein the plurality of resin cylinders 11 are removably connected in a row to the water collection pipe 17 by unions 18. (3) The device according to claim 1, wherein the plurality of resin cylinders 11 are arranged in a plurality of rows.