Recycling device for lithium battery negative electrode coating waste gas

The utility model discloses a lithium battery cathode coating waste gas recycling device which comprises a heat recoverer, a water washing absorption tower and a concentration unit, a hot side inlet of the heat recoverer is connected with an air outlet of a cathode drying oven of a coating machine, and a hot side outlet of the heat recoverer is connected with an air inlet of the water washing absorption tower through a pipeline. A cold side outlet of the heat recoverer is connected with an air inlet of the humidifier, an air outlet of the humidifier is connected with a return air inlet of the cathode drying oven, and low-concentration waste liquid at the bottom of the washing absorption tower is connected with an inlet of the concentration unit through a pipeline. The concentration unit is a rectifying tower with only a rectifying section, the tower top is provided with a condenser, and the tower kettle is provided with a reboiler. A water outlet of the washing absorption tower is connected with a water inlet