Landfill leachate pretreatment device

The utility model discloses a landfill leachate pretreatment device which comprises a dosing unit, a coagulation unit and a filter pressing unit, and the coagulation unit comprises an oxidation reaction chamber, a sodium hydroxide reaction chamber and a sodium carbonate reaction chamber which are communicated in sequence; the chemical adding unit is used for respectively adding corresponding reaction chemicals into the oxidation reaction chamber, the sodium hydroxide reaction chamber and the sodium carbonate reaction chamber, the oxidation reaction chamber is connected with a feeding passage for conveying a leachate stock solution, the feeding passage is provided with a material conveying pump, and the sodium carbonate reaction chamber is communicated with the filter pressing unit. According to the landfill leachate pretreatment device, the filter pressing units are integrated together, meanwhile, a sedimentation tank is omitted, the whole structure is compact, the occupied area is small, the landfill leachat