A compact three-phase separation method and device

Abstract

The invention relates to a compact three-phase separation method and device. The method combines rotational flow, air floatation and coalescence technologies are combined and comprises establishment of an air floatation and rotational flow field in a separation cavity and coalescence separation of oil skimming solution in an inner cylinder. The device comprises a tank, a distributor, a jet flow educator, the inner cylinder, an inner coalescence part and a bottom baffle, wherein a jet flow nozzle is arranged at the front part of the jet flow educator, so that a gas-liquid mixture is formed; a drain pipe at the lower part is properly arranged, so that a rotational flow field is established in the separation cavity; the synergistic effect of air floatation and rotational flow separation is played; an oil skimming groove for skimming oil is at the upper end of the inner cylinder; the inner coalescence part in the interior can complete coalescence separation of the oil skimming solution and independent excretion of oil water; and, due to reasonable design of the size of the inner cylinder, the rotational flow field in the separation cavity is more reasonable to distribute. The device is free from external gas supply and gas-liquid auxiliary circulation facilities and has the advantages of compact structure, short residence time and small occupation area; and the device can be widely applied to degassing and removing oil in production water or sewage containing oil and gas.

Description

Technical field

[0001] The invention relates to a compact three-phase separation method and device that combines swirling, air flotation and coalescence technologies, which is suitable for the integrated degassing and deoiling treatment of oily and gaseous production water or sewage, especially but not exclusively Suitable for degassing and degreasing treatment of petrochemical acid water. Background technique

[0002] There are many conventional oil-water separation technologies, such as gravity sedimentation, cyclone separation, air flotation, coalescence, adsorption, membrane separation, etc. The use of these conventional technologies and the series combination of equipment units to treat oily sewage often has high cost, high energy consumption, and high cost. The land is big. Gas-liquid separation is relatively easy. When the separation requirements are not high, simple methods such as reduced pressure flash evaporation and centrifugal degassing can be used to separate the g...

Images