Switchable water treatment device suitable for multiple working conditions

The utility model belongs to the technical field of oil and gas field water treatment devices, and discloses a switchable water treatment device suitable for multiple working conditions, which comprises a filtering coalescence demulsification unit, an air flotation unit and an ultrafiltration unit which are sequentially connected through pipelines, wherein the filtering coalescence demulsification unit comprises a filter, a coalescer and an electric demulsification device which are sequentially connected through a pipeline, the liquid inlet end of the filter is connected with a first water inlet pipe, a first electric valve is installed on the first water inlet pipe, the liquid outlet end of the electric demulsification device is connected with a fourth water inlet pipe, and the fourth water inlet pipe is connected with a second water inlet pipe. According to the utility model, different combination modes can be adopted according to actual conditions, water quality treatment is ensured to reach the standard,