Outer rotational flow limited flow channel membrane separator and method for demulsifying emulsion membrane through same

Abstract

The invention discloses an outer rotational flow limited flow channel membrane separator and a method for demulsifying an emulsion membrane through the same, and belongs to the technical field of chemical technology and chemical equipment .The outer rotational flow limited flow channel membrane separator comprises a round pipe shell, an emulsion outlet, an internal water phase material liquid outlet, a membrane separation pipe, a limited flow channel rotational flow plate, a pressure measuring opening and a material inlet .A round pipe is a cylindrical hollow pipe .The emulsion outlet is horizontally arranged on the lower portion of the round pipe .The internal water phase material liquid outlet is arranged in the center of the bottom of the round pipe .The membrane separation pipe is arranged inside the round pipe and is concentric with the cross section circle of the round pipe .The limited flow channel rotational flow plate is spirally arranged on the outer side of the membrane separation pipe and the inner side of the round pipe along the outer side of the membrane separation pipe .The material inlet is horizontally arranged on the upper portion of the round pipe and is parallel to the emulsion outlet .Emulsion can be forced to do constant screw-pitch rotational motion, namely approximately constant-speed rotational motion between spiral plates, the emulsion runs in the state of initially entering the membrane separator, the running time is long, the demulsifying rate is high, and the outer rotational flow limited flow channel membrane separator can be developed to be applied in demulsifying practical production .

Description

Technical field [0001] The invention belongs to the technical field of chemical processes and chemical equipment, and particularly relates to a method for demulsifying an emulsion liquid film of an external swirl flow restrictor membrane separator. Background technique [0002] Emulsion liquid membrane separation technology is an effective method to recover heavy metal ions from wastewater, but emulsion liquid membrane demulsification is the key to extracting and recovering heavy metal ions from the internal water phase and reusing the emulsion. Emulsion demulsification methods include standing method, distillation method, plasma method, electric demulsification method, microwave radiation method, ultrasonic demulsification method, centrifugal demulsification method, electrolyte method, chemical demulsifier demulsification method, and biological demulsification method , Grinding demulsification method, membrane separation method, etc. The process and equipment of the standing me...

AI Technical Summary

Problems solved by technology

The reason is that when the emulsion passes through the external swirl membrane separator, the emulsion runs in a spiral motion track at the beginning, and as the internal water phase separates, the resistance of the emulsion to do the spiral motion increases, and due to the gravity factor of the emulsion itself, the emulsion The trajectory of the movement in the separator changes dramatically, the flow rate of the emulsion decreases, and the chance of collision and friction between the emulsions and between the emulsion and the membrane tube wall decreases, resulting in a rapid decrease in the demulsification efficiency of the external cyclone separator. The separation efficiency decreases more obviously when the length increases

At the same time, due to the change of the trajectory and speed of the emulsion, the emulsion will cause some membrane pores to be blocked, and the plugging will increase with the growth of the membrane separation tube, and the normal operation time of the device will become shorter

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