Filtration liquid tank for dedusting device, and dedusting device with the same

A dedusting device comprising a filtration liquid tank comprising:

• a tank body having an inlet and an outlet;
• a cyclone separator disposed within the tank body and in communication with the outlet of the tank body, defining a cyclone separation chamber therein, and formed with a cyclone inlet in communication with the cyclone separation chamber;
• and
• a water pressing assembly disposed within the tank body and in communication with the inlet of the tank body, and configured to guide an airstream entering from the inlet towards a filtration medium and produce a circumferential motion, the airstream filtered by the filtration medium being exhausted from the outlet,
• wherein a communicating port is formed in a bottom of the cyclone separator and penetrates the bottom of the cyclone separator, and a float is provided in the cyclone separator to close the communicating port in a normally closed state.