Advanced treatment recovery device for oily sewage

Abstract

The invention discloses an advanced treatment recovery device for oily sewage. The device comprises an oily sewage inlet pipe, a clear water reuse output pipe, a crude oil output pipe and a controller, and also comprises a first-level electrolysis air floating device, a pipeline flocculator, a second-level electrocatalytic oxidation air floating device, a third-level electrocatalytic oxidation air floating device, a buffer tank, a first-level automatic energy-saving constant water supply device, an in vitro self-cleaning shell filter device, a second-level automatic energy-saving constant water supply device, an ion exchange device and a third-level automatic energy-saving constant water supply device. The advanced treatment recovery device has a simple structure; due to the adoption of the electrolysis air floating device, the treatment efficiency can be improved, the device is not easy to damage, the cost for overhaul is reduced to some extent, the electrolysis air floating device is efficient and energy-saving, so that the whole device has strong coordination and consistency and good use stability; due to the adoption of the ion exchange device, the use amount of acid and alkali is saved, the phenomenon of resin caking does not occur, the resin layer is uniformly fluidized, the device is effectively improved in term of the capacity of processing oil field sewage, and has good applicability and strong practicability.

Description

technical field [0001] The invention belongs to the technical field of oilfield sewage treatment, and in particular relates to an advanced treatment and recovery device for oily sewage. Background technique [0002] At present, clean water is used for thermal recovery boilers in oil production plants, which causes a lot of waste of clean water resources. At the same time, it is necessary to find a way out for the remaining sewage discharge, which affects the sustainable development of oil fields to a certain extent, and also pollutes the environment and causes waste. Oilfield sewage is mainly polymer-containing sewage, and its composition is very complicated. The composition of the exported sewage after treatment at the oilfield sewage station is also complex, including: oil, polymer, suspended matter, COD Cr , Ca 2+ , Fe 2+ , and there is a large amount of water degrading HPAM in sewage, resulting in strong interfacial activity and emulsifying ability of polymer sewage, m...

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Problems solved by technology

[0002] At present, clean water is used for thermal recovery boilers in oil production plants, which causes a lot of waste of clean water resources. At the same time, it is necessary to find a way out for the remaining sewage discharge, which affects the sustainable development of oil fields to a certain extent, and also pollutes the environment and causes waste. Oilfield sewage is mainly polymer-containing sewage, and its composition is very complicated. The composition of the exported sewage after treatment at the oilfield sewage station is also complex, including: oil, polymer, suspended matter, COD Cr , Ca 2+ , Fe 2+ , and there is a large amount of water degrading HPAM in sewage, resulting in strong interfacial activity and emulsifying ability of polymer sewage, making it difficult to treat

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