Apparatus and method for recovering petroleum and phenols from oilfield produced wastewater

A technology for oil production wastewater and petroleum, which is applied in the fields of resource recycling and environmental engineering, can solve the problems of non-recycling of phenols, waste of resources, and high cost, etc., to reduce the cost of sludge treatment, low cost of wastewater treatment, and realize comprehensive utilization Effect
CN105600976AInactive Publication Date: 2016-05-25BOYING XIAMEN SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BOYING XIAMEN SCI & TECH
Publication Date
2016-05-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

An apparatus for recovering petroleum and phenols from oilfield produced wastewater is formed by a wastewater equalization pool, a demulsification pool, a gravity settling pool or a centrifuge or an air floatation device, a petroleum storage tank, a wastewater collecting pool, a phenol adsorption tower, an eluant storage tank, a phenol-containing eluate storage tank, an adsorption tower dephenolized wastewater storage tank, a phenol extraction tank extractant storage tank, a distillation tower and a phenol storage tank. A recovery method adopting the apparatus comprises the following steps: 1, adding an acid to the oilfield produced wastewater to adjust the pH value to 2-6 in order to demulsify; 2, carrying out gravity settlement, centrifuge or air floatation separation on the demulsified oilfield produced wastewater to obtain recovered petroleum and deoiled or dewaxed wastewater; and 3, allowing the deoiled or dewaxed wastewater to go through the adsorption tower and to adsorb phenols in the wastewater, and adding a 5-10% sodium hydroxide solution or alcohol after absorption is saturated to elute in order to regenerate an adsorbent and recover phenols. Influences of phenol wastewater treatment on biochemical treatment are eliminated through recovering petroleum and phenols from the oilfield produced wastewater, and the apparatus and the method simultaneously realize treatment of pollution of the oilfield produced wastewater and recycling of resources.
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Description

technical field

[0001] The invention relates to a device and a method for recovering petroleum and phenol from oil production wastewater, in particular to a device and method for recovering petroleum and phenol from oil production wastewater by adopting the combined treatment of pH adjustment, demulsification, gravity sedimentation separation, centrifugal separation or air flotation and adsorption and the like. The method belongs to the fields of resource recycling and environmental engineering. Background technique

[0002] At present, my country's onshore oil fields basically adopt the water injection development method, that is, inject high-pressure water into the formation to drive crude oil to be extracted from the oil well. After a period of water injection, the injected water will be produced together with the crude oil. As the development time prolongs, the water content of the produced crude oil will continue to rise. Oilfield oil production wastewater (also known ...

Claims

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