Electrolysis induction and ozone floatation integrated device

Abstract

The invention discloses an electrolysis induction and ozone floatation integrated device. The device comprises an electric flocculation core barrel, an ozone floatation/catalytic oxidation zone, a water outlet barrel and a scum zone, wherein waste water accomplishes destabilization agglomeration in the electric flocculation core barrel; hydrogen peroxide is added to the upper part of the electric flocculation core barrel, so as to form a Fenton oxidation system with iron ion in the water; the ozone floatation/catalytic oxidation zone is connected with the top of the electric flocculation core barrel; waste water forms an ozone/hydrogen peroxide/iron ion ozone catalytic oxidation system in the ozone floatation/catalytic oxidation zone; refractory organics are further removed through oxidation; flotation process is further accomplished in ozone gas dissolved water under the action of microbubbles; the water outlet barrel is communicated with the bottom of the ozone floatation/catalytic oxidation zone, and ensures that the ozone floatation/catalytic oxidation zone has certain liquid level; the scum zone is positioned at the tops of the electric flocculation core barrel and the ozone floatation/catalytic oxidation zone, and stores and eliminates ozone floatation scums. The device can synchronously and efficiently remove various pollutants, such as SS, emulsified oil, chroma and the soluble refractory organics, only through a stable power supply and necessary hydrogen peroxide supply, and is simple to operate, and low in operation and maintenance costs.

Description

Technical field [0001] The invention belongs to the technical field of environmental water treatment, and particularly relates to an electrolysis-induced ozone air flotation integrated device. Background technique [0002] Oil and gas field wellsite wastewater refers to the wastewater generated during operations of increasing and stabilizing production of oil / gas wells. It mainly includes wastewater from a series of operations such as workover, completion and cementing, fracturing, and well washing. The water quality of this type of wastewater is characterized by high SS, high chemical oxygen demand, and high emulsified oil content; in addition, a series of synthetic agents added to the operation water of the measures are discharged into the natural environment with the wastewater, and such synthetic substances generally have Non-degradable characteristics. [0003] For this type of waste water, the inventor used the ozone flotation process (ZL 200410073500.4; ZL201410616487.6) fo...

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Problems solved by technology

However, the above-mentioned processes and devices still have the following shortcomings and deficiencies in the operation process of oilfield wastewater treatment: due to the scattered oilfield well sites, a large number of wastewater treatment stations, in addition to insufficient operation and management personnel, and the distance between each treatment station is relatively long, As a result, the operators failed to inspect the water treatment stations under their jurisdiction in a timely manner within the specified time, and could not prepare the required coagulants and coagulants on time and accurately; the additives used in various measures generally have the characteristics of refractory degradation. The advanced ozone dissolved air flotation treatment technology cannot complete the complete oxidation of such pollutants within the designed treatment time (about 30 minutes), and some refractory additives are discharged into the surrounding environment of the oil field with the treated water, making the already fragile ecological The environment is further and continuously damaged

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