A method and device for removing oil from a horizontal air flotation coupled corrugated plate

Abstract

The invention relates to a method and a device for degreasing a horizontal air flotation coupling corrugated plate. The method is that the oily wastewater containing a small amount of solid particles passes through the branch-type horizontal air bubble generator installed in front of the corrugated plate, and the air bubbles of 10-30m are evenly brought into the interval between the inclined corrugated plates, and the oil droplets are rapidly discharged under the action of the air bubbles. Float up to the upper part of the two-layer corrugated plate, move to the crest of the corrugated plate, and quickly coalesce into large oil droplets to float and separate through the shallow pool settlement of the corrugated plate to realize the rapid separation of oil and water. The present invention also provides a set of devices for realizing the method, including a housing, a feed pipe, a branch-type horizontal bubble generator, a symmetrical perforated corrugated coalescing plate, a water outlet, an oil outlet, an oil separator, an air Several parts such as the bag and the boundary meter. The method of the present invention has fast separation speed and high efficiency, and prevents the deposition and clogging of solid particles through the inclined setting of the corrugated plate, and can be widely used in the rapid treatment process of oily wastewater containing trace solid particles.

Description

technical field [0001] The present invention relates to the technical field of solid-liquid-liquid three-phase separation in the process of energy and chemical industry, and relates to a method for degreasing muddy waste water. Specifically, it relates to an optimal combination method using multi-layer inclined plate unit and horizontal air flotation coupling technology. It realizes the efficient, rapid and low energy consumption separation of three phases, and is suitable for various processes, such as sewage treatment, crude oil extraction, etc. The present invention also relates to a device for the above-mentioned muddy wastewater degreasing method. Background technique [0002] Oily sewage will be produced in the process of oil exploitation, oil refining, petrochemical, oil storage and transportation, oil tanker accident, ship shipping, vehicle cleaning, machinery manufacturing, food processing, etc., which is extremely harmful to human health, environmental protection a...

AI Technical Summary

Problems solved by technology

It utilizes complexes or organic compounds formed by ions and surfactants. Due to their low interfacial tension and strong hydrophobicity, they are preferentially adsorbed on the gas-liquid interface of rising bubbles or enter the bubbles through diffusion. The rise of the bubbles is brought into a thin layer of non-volatile organic capture solvent that is static in the upper layer of the water phase, so as to achieve the purpose of separating from the water phase, but the air flotation separation technology is more suitable for the treatment of low-concentration oily sewage. The treatment effect is very poor at high concentrations, and the air flotation separation technology has high requirements for the stability of sewage concentration, which is only suitable for medium and low concentrations when the concentration is stable.

[0007] Chinese patent application 101602531 discloses an electrochemical method for degreasing oil from polymer flooding oil production wastewater, which has a relatively limited scope of application and high energy consumption; Chinese patent application No. 201310340495.8 discloses an air flotation swirl flow coalescence composite type sewage degreasing device, relatively high energy consumption, relatively complex structure, and relatively slow separation speed; Chinese patent application number 201410584515.0 discloses a pretreatment method for degreasing high-concentration sewage in coal chemical industry, and its application range is relatively limited , and its processing effect is relatively extensive, and the cost of fine processing is relatively high;

[0008] In the current oil treatment, the efficiency of sewage oil removal is contradictory to the cost of oil removal, and an efficient and economical oily sewage treatment device is urgently needed

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