Ultrasonic high-COD (Chemical Oxygen Demand) salt-containing wastewater pretreatment equipment

The invention belongs to the technical field of sewage treatment, and particularly relates to ultrasonic high-COD salt-containing wastewater pretreatment equipment which comprises a main storage barrel, a sliding filter membrane is slidably connected to the surface of the main storage barrel, water injection devices are slidably connected to the two sides of the surface of the sliding filter membrane, and a propelling device is slidably connected to one end of an inner cavity of the main storage barrel. According to the device, sewage entering an inner cavity of a main storage barrel from a water injection through pipe is filtered through an external sliding filter membrane, large-particle impurities in the sewage are removed, then the pretreatment effect is achieved, however, the problems that the sliding filter membrane needed for filtering is prone to damage in the pressurization process, and a single filter point is prone to being blocked are solved, and the problem that an existing device is prone to bei