Demulsification, dehydration and filter pressing integrated process for hydrate oil sludge

The invention relates to the technical field of oil sludge treatment, and discloses a hydrate oil sludge demulsification, dehydration and filter pressing integrated process which comprises the following steps: adding oil sludge into a reaction kettle; cooling the reaction kettle, introducing high-pressure carbon dioxide into the reaction kettle, and standing for 50-70 minutes until a carbon dioxide hydrate is generated after the temperature of the reaction kettle is reduced to 4-6 DEG C and the pressure is increased to 5 MPa; opening a pressure release valve at the bottom of the reaction kettle, carrying out self-driven filter pressing under the pressure in the reaction kettle, discharging oil, water and gas, and separating; and when the pressure in the reaction kettle is reduced to 1MPa, heating the reaction kettle, and when the temperature of the reaction kettle rises to normal temperature and the pressure is lower than 0.2 MPa, releasing the pressure of the reaction kettle and taking out the dried oil slud