Water production facility and method of replacing ion exchange resin

A water production facility comprising:

• a polisher configured to be filled with an ion exchange resin;
• an inflow line configured to allow water to be treated to flow into the polisher;
• an inflow valve connected to the inflow line and upstream of the polisher;
• an outflow line configured to allow the water to be treated to flow out from the polisher;
• an outflow valve connected to the outflow line and downstream of the polisher;
• a connection line configured to connect the inflow line and the outflow line;
• a connection valve connected to the connection line;
• a first drain line connected to the polisher and at a higher vertical level than a vertical level of the inflow line;
• a first drain valve connected to the first drain line and downstream of the polisher;
• a plurality of sub-drain lines branched from the outflow line and connected to the first drain line;
• a plurality of sub-drain valves, connected to the plurality of sub-drain lines, respectively;
• a second drain line branched from the outflow line;
• a plurality of second drain valves connected to the second drain line;
• a third drain line branched from the second drain line and at a higher vertical level than a vertical level of the second drain line;
• a first discharge line branched from the second drain line and connected to the third drain line and a second discharge line branched from the first discharge line;
• and
• a first discharge valve and a second discharge valve, connected to the first discharge line and the second discharge line, respectively,
• wherein the inflow valve, the outflow valve, the first drain valve, the plurality of sub-drain valves, the plurality of second drain valves, the first discharge valve, and the second discharge valve are automatic valves, and
• wherein the connection valve is a manual valve.

A method of replacing an ion exchange resin, the method comprising:

• closing a plurality of valves for preparing for replacement of the ion exchange resin in a polisher;
• draining materials inside the polisher;
• replacing the ion exchange resin;
• cleaning the replaced ion exchange resin;
• and
• preparing for an operation of the polisher,
• wherein the cleaning of the replaced ion exchange resin comprises filling the polisher with first cleaning water, performing a first cleaning process of cleaning the replaced ion exchange resin with the first cleaning water, filling the polisher with second cleaning water, and performing a second cleaning process of cleaning the ion exchange resin with the second cleaning water, and
• wherein the draining, the cleaning, and the preparing are performed based on an operation of at least one automatic valve of the plurality of valves.