Oil field acid fracturing wastewater purification process and device

The invention relates to a process and a device for purifying acidizing and fracturing wastewater of an oil field. The purification process comprises the following steps: pumping the oilfield acid fracturing wastewater into a wastewater pool through a pump body for precipitation, and filtering impurities in the wastewater pool; pumping the wastewater into a demulsification tank for stirring to complete demulsification of the acid fracturing wastewater; pumping the wastewater into a boiling bed to purify the wastewater; the method comprises the following steps: treating wastewater by a boiling bed, pumping the treated wastewater into a coupling reaction tank, and carrying out oxidation reaction in the coupling reaction tank to remove part of organic matters in the wastewater; the wastewater is injected into the catalysis tank from the coupling reaction tank through the pump body so as to remove part of chemical oxygen demand in the wastewater; the wastewater is sequentially injected into the sedimentation tank