Three-phase separation system for fine separation

Abstract

The invention relates to a three-phase separation system for fine separation, which comprises a primary horizontal three-phase separator, a secondary vertical water-phase separator, a secondary vertical oil-phase separator, an oil-water interface identification mechanism and a controller for controlling the operation of the system, an inlet distributor, a steady flow plate, a wave absorber, a coalescer and a weir plate are sequentially arranged in the square tank body from the three-phase inlet, the bottom side of the weir plate is rotatably mounted on the square tank body through a rotating shaft, and the rotating shaft is driven to rotate through a gear rotating mechanism and drives the weir plate to rotate around the central axis of the rotating shaft; the end surface of one side of the weir plate close to the water phase outlet is hermetically mounted on the square tank body through a sealing mechanism; secondary separation of a water phase and dispersed oil drops in the water phase and secondary separation of an oil phase and dispersed water drops in the oil phase are achieved, the separation effect is improved, meanwhile, the height of an oil-water interface can be recognized, the height of a weir plate is automatically adjusted, oil phase residues in a water phase cavity are reduced, the oil phase obtaining rate is increased, and oil phase waste is reduced.

Description

technical field [0001] The invention relates to the technical field of three-phase separators, in particular to a three-phase separation system for fine separation. Background technique [0002] In the prior art, the oil-gas-water three-phase separation system usually separates the oil-gas-water mixture once, and can only separate the dispersed phase with the droplet size larger than 30 μm, and the separation accuracy is low, and the oil phase obtained after separation still has dispersed particles. Fine droplets, the oil-water phase separation is not complete; in addition, in the three-phase separation system, the weirs used for the separation of oil and water phases are mostly set at the oil-water interface. However, during the separation process, with the oil-water in the three-phase mixture When the proportion changes, the oil-water interface also changes at any time. In order to ensure the purity of the oil phase, the height of the weir is usually set at a position much...

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Problems solved by technology

[0002] In the prior art, the oil-gas-water three-phase separation system usually separates the oil-gas-water mixture once, and can only separate the dispersed phase with a droplet size greater than 30 μm. The separation accuracy is low, and the oil phase obtained after separation is still dispersed. In addition, in the three-phase separation system, the weir plate used for the separation of the oil phase and the water phase is usually set at the oil-water interface. However, during the separation process, as the oil-water in the three-phase mixture As the proportion changes, the oil-water interface also changes at any time. In order to ensure the purity of the oil phase, the height of the weir plate is usually set at a position much higher than that of the conventional oil-water interface. However, this method will undoubtedly cause a part of the oil phase to remain in the In the water phase chamber and discharged with the water phase, resulting in waste

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