A system for cleaning and recycling chlorine bypass dust, comprising:
- a mixing unit 100 that mixes chlorine bypass dust containing calcium (Ca), potassium (K), chlorine (Cl) and heavy metals with water to produce a first mixed liquid;
- a leaching agent supply unit 150 that supplies a leaching reagent for leaching heavy metals into the first mixed liquid of the mixing unit 100;
- a flocculant supply unit 160 that supplies flocculant for flocculating heavy metals leached into the first mixed liquid of the mixing unit 100;
- a first solid-liquid separation unit 200 that is connected with the mixing unit 100, and solid-liquid separates the first mixed liquid and separates the first mixed liquid into coagulated heavy metals and a second mixed liquid;
- a first mineralization unit 300 that is connected with the first solid-liquid separation unit 200, and supplies carbon dioxide to the second mixed liquid to mineralize calcium (Ca) contained in the second mixed liquid into a first precipitate in the form of carbonate;
- a second solid-liquid separation unit 230 that is connected with the first mineralization unit 300, and solid-liquid separates the second mixed liquid and separates the second mixed liquid into a first precipitate and a third mixed liquid;
- an evaporation concentration unit 500 that is connected with the second solid-liquid separation unit 230, and evaporates and concentrates the third mixed liquid to produce potassium chloride (KCl);
- a cleaning unit 700 that is connected with the second solid-liquid separation unit 230, and mixes the first precipitate with water to produce a first clean water liquid;
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- a fourth solid-liquid separation unit 800 that is connected with the cleaning unit 700, and solid-liquid separates the first cleaning liquid and separates the first cleaning liquid into solids and a second cleaning liquid.