Carbonation device and method of carbonation using the same

1. A carbonation device comprising:

a storage tank configured to store a carbonation subject solution, wherein the carbonation subject solution is lithium hydroxide;

a droplet spray unit configured to spray the lithium hydroxide from the storage tank in droplets, wherein the droplet spray unit includes a high-pressure pump and a droplet spray nozzle, the high-pressure pump being coupled to the storage tank, and wherein the droplet spray unit is configured to change a particle diameter of the droplets by adjusting a pressure of the high-pressure pump and a nozzle diameter of the droplet spray nozzle;

a carbonation reaction tank coupled with the droplet spray unit to receive the droplet-sprayed lithium hydroxide through the droplet spray nozzle that is mounted to an upper part of the carbonation reaction tank, wherein the carbonation reaction tank is filled with a carbonation gas under a predetermined pressure to provide a slurry by a carbonation reaction of the droplet-sprayed lithium hydroxide with the filled carbonation gas;

a carbonation gas supply unit configured to supply the carbonation gas into the carbonation reaction tank to maintain the carbonation gas in the carbonation reaction tank under the predetermined pressure;

a slurry outlet unit configured to eject the slurry from the carbonation reaction tank to maintain the slurry formed in the carbonation reaction tank within a predetermined level; and

an alkali solution input unit disposed in the carbonation reaction tank to adjust a pH of the slurry formed in the carbonation reaction tank,

wherein the alkali solution input unit comprises:

a pH measuring unit configured to automatically measure the pH of the slurry in the carbonation reaction tank;

an alkali solution input pump configured to supply an alkali solution to the carbonation reaction tank according to the pH measured by the pH measuring unit; and

an alkali solution input nozzle connected to the alkali solution input pump and configured to input the alkali solution into the carbonation reaction tank.

2. The carbonation device of claim 1 , further comprising:

a level measurement unit configured to generate a signal to determine whether an amount of slurry formed in the carbonation reaction tank is out of the predetermined level;

wherein the slurry outlet unit is configured to eject the slurry from the carbonation reaction tank based on the generated signal.

3. The carbonation device of claim 1 , wherein the droplet spray unit is configured to push the lithium hydroxide through the droplet spray nozzle to provide the droplets.

4. The carbonation device of claim 1 , wherein the droplet spray unit is configured to change the particle diameter of the droplets from about 80 to about 200 μm.

5. The carbonation device of claim 1 , wherein the carbonation gas supply unit comprises:

a pressure measuring unit configured to measure a pressure in the carbonation reaction tank;

a carbonation gas supply valve configured to supply the carbonation gas into the carbonation reaction tank to reach the predetermined pressure in the carbonation reaction tank; and

a pressure control valve configured to exhaust the carbonation gas in the carbonation reaction tank when the measured pressure is higher than the predetermined pressure.

6. The carbonation device of claim 1 , further comprising a safety valve configured to rapidly lower an internal pressure of the carbonation reaction tank when the internal pressure of the carbonation reaction tank is excessively high.

7. The carbonation device of claim 1 , wherein the carbonation gas supply unit is configured to maintain a pressure in the carbonation reaction tank ranging from a room pressure to about 10 bar.

8. The carbonation device of claim 1 , wherein the droplet spray unit is configured to spray the lithium hydroxide in droplets that free-fall in the carbonation reaction tank for a distance of greater than or equal to about 3 meters.

9. The carbonation device of claim 1 , wherein the carbonation reaction tank is made of PVC, PE, or high-strength concrete.

10. The carbonation device of claim 1 , wherein the carbonation reaction tank is made of a stainless steel material coated with TEFLON (tetrafluoroethylene) or urethane.

11. The carbonation device of claim 1 , further comprising a vacuum pump configured to remove air from the carbonation reaction tank to provide a vacuum state in the carbonation reaction tank before inputting the carbonation gas into the carbonation reaction tank.

12. The carbonation device of claim 1 , wherein the slurry outlet unit includes a rotary dump valve disposed in the carbonation reaction tank.