Ion removing system

1. An ion removing system comprising:

an ion removing apparatus that comprises a hard water storage part for storing hard water and a fine bubble generator for generating and supplying fine bubbles provided by an ion removal gas, each bubble having a diameter of 100 μm or less, in a proportion of 90% or more to the hard water storage part and wherein the ion removing apparatus causes the fine bubbles to adsorb and thereby remove a plurality of metal ions in the hard water,

a primary-side flow path connected to the ion removing apparatus to supply the hard water to the ion removing apparatus,

a separating apparatus including a separating part having an inner circumferential surface and a crystal storage part, the separating part connected to the ion removing apparatus by a connection flow path disposed on an upper outer circumferential portion of the hard water storage part, the separating part for separating at least some of a plurality of crystals of a metal component deposited by crystallizing at least some of the plurality of metal ions removed from the hard water by the ion removing apparatus, wherein:

the connection flow path is connected to the separating part such that the hard water having passed through the ion removing apparatus is discharged in an eccentric arrangement relative to a central axis of the separating apparatus, and

the crystal storage part is disposed below the separating part, the crystal storage part including a discharge flow path for discharging the hard water containing the plurality of crystals of the metal component, the discharge flow path provided with an opening/closing valve capable of opening and closing the discharge flow path, and

a discharge-side backflow prevention mechanism is disposed on the discharge flow path downstream of the opening/closing valve in a discharge direction and is configured to prevent backflow by a spout space disposed at an outlet of the discharge flow path, and

a secondary-side flow path connected to the separating apparatus to take out, from the separating apparatus, treated water obtained by separating the plurality of crystals, a return flow path connected to the separating apparatus and the primary-side flow path to return a portion of the treated water to the primary-side flow path, wherein

the primary-side flow path is provided with at least a supply-side check valve.

2. The ion removing system according to claim 1 , wherein

the supply-side check valve is disposed on the primary-side flow path upstream of the return flow path in a flow direction of the hard water.

3. The ion removing system according to claim 1 , further comprising

a bypass flow path connecting the primary-side flow path and the secondary-side flow path, and

a flow switching valve switching a flow direction of the hard water flowing through the primary-side flow path to either the ion removing apparatus or the bypass flow path, wherein

the supply-side check valve is disposed on the primary-side flow path upstream of the bypass flow path in the flow direction of the hard water flowing through the primary-side flow path to the bypass flow path.

4. The ion removing system according to claim 1 , wherein the discharge flow path may be provided with at least a discharge-side check valve.

5. The ion removing system according to claim 1 , further comprising a bypass flow path connecting the primary-side flow path and the secondary-side flow path, and

a flow switching valve switching a flow direction of the hard water flowing through the primary-side flow path to either the ion removing apparatus or the bypass flow path.

6. The ion removing system according to claim 5 , wherein

the flow switching valve comprises a first valve capable of opening and closing the primary-side flow path, a second valve capable of opening and closing the secondary-side flow path, and a third valve capable of opening and closing the bypass flow path.

7. The ion removing system according to claim 6 , further comprising a controller controlling opening and closing operations of the first valve, the second valve, and the third valve, wherein

the controller is configured to selectively provide a first control of opening the first valve and the second valve and closing the third valve, and a second control of closing the first valve and the second valve and opening the third valve.

8. The ion removing system according to claim 1 , further comprising a pump causing the hard water flowing through the primary-side flow path to flow through the ion removing apparatus to the separating apparatus.

9. The ion removing system according to claim 1 , wherein a circulation flow path that is a closed system, is constituted by the primary-side flow path, the ion removing apparatus, the separating apparatus, and the return flow path.

10. The ion removing system according to claim 1 , wherein the ion removing apparatus comprises a connection flow path connected to the separating apparatus below an end portion of the return flow path.

11. The ion removing system according to claim 1 , further comprising a solubilizer supply tank supplying a solubilizer for dissolving the plurality of crystals deposited by crystallizing the plurality of metal ions to an upstream side in a flow direction of the hard water relative to the separating apparatus.

12. The ion removing system according to claim 11 , further comprising a pump causing the hard water flowing through the primary-side flow path to flow through the ion removing apparatus to the separating apparatus, wherein

the fine bubble generator is disposed downstream of the pump in a flow direction of the hard water.

13. The ion removing system according to claim 11 , wherein

a circulation flow path is constituted by the primary-side flow path, the ion removing apparatus, the separating apparatus, and the return flow path; and

the solubilizer supply tank is disposed to supply the solubilizer into the circulation flow path.