JP2015054302A - Water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment apparatus capable of performing continuously the ion exchange treatment by ion exchange resin and the filtration treatment by filtration material while aiming the downsizing and simplification of the apparatus.SOLUTION: The water treatment apparatus is constructed by partitioning the inside of a treatment tank 12 into an ion exchange treatment chamber 15 and a filtration chamber 16 by a partition wall 14 having an overflow section 13. The ion exchange treatment chamber comprises a raw-water inlet portion 18 and an agitator 19 in the lower section, and the filtration chamber comprises a filtration-material layer 20 in the middle section and a treatment-water outlet portion 21 in the lower section. The ion exchange treatment chamber performs the ion exchange treatment during the course of upward flow, and the filtration chamber performs the filtration treatment to the ion exchanged treatment-water entering from the ion exchange treatment chamber during the course of downward flow.

Description

  The present invention relates to a water treatment device, and more particularly to a water treatment device including an ion exchange treatment and a filtration treatment.

  As a water treatment device for treating raw water containing soluble organic components that cause generation of odorous substances such as mold odor and trihalomethane, powdered activated carbon and powdered ion exchange resin are mixed simultaneously with raw water, After adsorbing odorous substances and soluble organic components to activated carbon and ion exchange resin, the treated water from which odorous substances and soluble organic components have been removed is obtained by solid-liquid separation of activated carbon and ion exchange resin by solid-liquid separation means. An obtained water treatment apparatus is known (for example, refer to Patent Document 1).

JP 2011-230038 A

  However, in the water treatment apparatus as described in Patent Document 1, a mixing tank for mixing the activated carbon and the ion exchange resin and a separation tank for separating them are separately provided and connected by piping or the like. Therefore, there are problems such as an increase in initial cost and a need for a large installation space.

  Then, this invention aims at providing the water treatment apparatus which can perform continuously the ion exchange process by an ion exchange resin, and the filtration process by a filter medium, aiming at size reduction and simplification of an apparatus.

  In order to achieve the above object, the water treatment apparatus of the present invention divides the inside of a treatment tank into an ion exchange treatment chamber and a filtration chamber by a partition wall, and the ion exchange treatment chamber has raw water in the lower part of the treatment chamber. And a stirrer for mixing the raw water and the ion exchange resin, and the filtration chamber is provided with a filter medium layer provided in the middle stage, and a treated water lead provided under the filter medium layer. The ion exchange treatment chamber makes the raw water and the ion exchange resin contact in an upward flow, and the filtration chamber flows from the upper part of the ion exchange treatment chamber into the upper part of the filtration chamber. In contrast, it is characterized in that filtration is performed in a downward flow.

  Furthermore, the water treatment apparatus of the present invention is provided with an overflow portion or a water passage hole for allowing ion exchange treated water to flow from the ion exchange treatment chamber into the filtration chamber at the upper portion of the partition wall, and the filter medium. The filter medium of the layer is characterized by containing at least one of quartz sand, granular activated carbon, anthracite, manganese sand, and contact filter medium.

  According to the water treatment device of the present invention, the interior of the treatment tank is partitioned into an ion exchange treatment chamber and a filtration chamber by a partition wall, so that the water treatment device can be downsized and simplified while using an ion exchange resin. The ion exchange treatment and the filtration treatment with the filter medium can be performed continuously.

It is explanatory drawing which shows one example of the water treatment apparatus of this invention.

  The water treatment apparatus 11 shown in the present embodiment divides the inside of the treatment tank 12 into an ion exchange treatment chamber 15 and a filtration chamber 16 by a partition wall 14 having an overflow portion 13 at the upper portion, and the ion exchange treatment chamber 15. Then, the raw water and the ion exchange resin are brought into contact with each other in an upward flow to perform an ion exchange treatment, and the filtration chamber 16 is configured to perform a filtration treatment with a filter medium in a downward flow.

  A lower part of the ion exchange treatment chamber 15 is provided with a raw water introduction part 18 for introducing the raw water supplied from the raw water introduction path 17 into the lower part of the tank, and the raw water in the tank is stirred to effect the raw water and the ion exchange resin. A stirrer 19 is provided for mixing and contacting.

  The middle part of the filtration chamber 16 is provided with a filter medium layer 20 filled with a filter medium in accordance with the purpose of the raw water treatment. Under the filter medium layer 20, a treated water derivation for deriving treated water that has been subjected to the filtration process is provided. A portion 21 is provided.

  Moreover, in the water treatment apparatus 11 shown in this embodiment, the stirring action of the stirrer 19 is appropriately set by appropriately setting the inflow amount of raw water, the cross-sectional area and height of the ion exchange treatment chamber 15, and the stirring strength of the stirrer 19. Ion exchange resin sedimentation in which an ion exchange resin having a specific gravity greater than that of water is settled toward the lower portion of the ion exchange treatment chamber 15 from the water rising above the ion exchange treatment chamber 15 at the upper portion of the ion exchange treatment chamber 15 that does not reach A portion 22 is formed.

  The raw water flows into the lower part of the ion exchange treatment chamber 15 from the raw water introduction part 18, is agitated by the agitator 19, and mixes with and comes into contact with the ion exchange resin previously put in the ion exchange treatment chamber 15. The ion exchange treated water that has been subjected to the ion exchange treatment in contact with the ion exchange resin ascends in the ion exchange treatment chamber 15 while being stirred by the stirrer 19, and the upper portion of the ion exchange treatment chamber 15 in which the stirring force is weakened. In the ion exchange resin sedimentation section 22, the ion exchange resin settles toward the bottom of the ion exchange treatment chamber 15 against the flow of ion exchange treatment water rising at a predetermined speed. The ion exchange treated water that has risen to the uppermost part of the ion exchange treatment chamber 15 passes through the overflow section 13 and flows into the upper portion of the filtration chamber 16, passes through the filter medium layer 20 in a downward flow, and undergoes a predetermined filtration treatment. After that, it is taken out from the lower treated water outlet 21.

  Thus, by providing the partition wall 14 having the overflow portion 13 at the upper portion as a water flow portion and partitioning one treatment tank 12 into an ion exchange treatment chamber 15 and a filtration chamber 16, chromaticity, organic matter, etc. A predetermined ion exchange process for removing water and a predetermined filtration process such as removal of turbidity and metals can be performed in one treatment tank 12, and the water treatment apparatus 11 can be downsized.

  Moreover, by forming the ion exchange resin sedimentation part 22 in the upper part of the ion exchange treatment chamber 15, the ion exchange resin can be held in the ion exchange treatment chamber 15 without flowing out of the ion exchange treatment chamber 15, Therefore, the ion exchange ability of the ion exchange resin can be fully utilized. Thereby, while being able to reduce the usage-amount of an ion exchange resin, the usage-amount of the chemical | medical agent for reproducing | regenerating an ion exchange resin can also be reduced, and the quantity of the regeneration waste liquid generate | occur | produced when reproducing | regenerating an ion exchange resin can also be reduced. .

  On the other hand, in the filtration chamber 16, as a filter medium used for the filter medium layer 20, silica sand, granular activated carbon, anthracite, manganese sand, contact filter medium, etc. are appropriately used according to the properties of raw water, so that mold odor, ammonia, manganese, etc. Removal can also be performed.

  In addition, the ion exchange resin with reduced ion exchange capacity can be regenerated and reused by a known regeneration method by being extracted from an appropriate position such as the bottom of the ion exchange treatment chamber. The ion exchange resin can be introduced from above the ion exchange treatment chamber.

  In addition, since ion exchange resin generally has a higher specific gravity than water, the amount of ion exchange resin that flows out of the ion exchange treatment chamber beyond the overflow section without intentionally forming the ion exchange resin sedimentation section. Is small, and even if it flows into the filtration chamber beyond the overflow section, it stays on the filter medium layer and therefore does not flow out from the treated water outlet section together with the treated water. Conversely, by providing an inclined plate in the upper part of the ion exchange treatment chamber, it is possible to prevent the ion exchange resin from rising to the overflow section by promoting the sedimentation of the ion exchange resin.

  In this embodiment, an overflow portion is provided at the upper part of the partition wall in order to allow the ion exchange treated water to flow into the filtration chamber. However, a water flow hole is provided at an appropriate position on the upper part of the partition wall. As indicated by an arrow W, ion-exchanged water may be allowed to flow into the filtration chamber from this water passage hole.

  DESCRIPTION OF SYMBOLS 11 ... Water treatment apparatus, 12 ... Treatment tank, 13 ... Overflow part, 14 ... Partition wall, 15 ... Ion exchange treatment room, 16 ... Filtration room, 17 ... Raw water introduction path, 18 ... Raw water introduction part, 19 ... Stirrer , 20 ... filter medium layer, 21 ... treated water lead-out part, 22 ... ion exchange resin sedimentation part

Claims (3)

  The interior of the treatment tank is partitioned into an ion exchange treatment chamber and a filtration chamber by a partition wall, and the ion exchange treatment chamber comprises a raw water introduction portion for introducing raw water into a lower portion of the treatment chamber, and raw water and an ion exchange resin. The filter chamber is provided with a filter medium layer provided in a middle stage part, and a treated water outlet part provided below the filter medium layer, and the ion exchange process chamber is an upward flow The raw water and the ion exchange resin are brought into contact with each other, and the filtration chamber performs a down-flow filtration process on the ion exchange treated water that has flowed into the upper portion of the filtration chamber from the upper portion of the ion exchange treatment chamber. Water treatment equipment.   The water treatment device according to claim 1, wherein an overflow portion or a water passage hole for allowing ion exchange treated water to flow from the ion exchange treatment chamber into the filtration chamber is provided at an upper portion of the partition wall.   The water treatment device according to claim 1 or 2, wherein the filter medium in the filter medium layer contains at least one of silica sand, granular activated carbon, anthracite, manganese sand, and contact filter medium.

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