System and method for treating polymer-containing and glue-containing wastewater through plasma combination

Abstract

The invention discloses a system and a method for treating polymer-containing and glue-containing wastewater through plasma combination. The system comprises a buffer pool (1), a lifting pump (2), a plasma destabilization device (3), a high-voltage pulse power supply (4), an air compressor (5), an induced draft fan (6), an electro-Fenton reactor (7), a low-voltage direct-current power supply (8), a membrane separation unit (9) and a reflux pump (10). According to the method, the polymer-containing and glue-containing wastewater sequentially enters a plasma destabilization device (3), an electro-Fenton reactor (7) and a membrane separation unit (9) to be subjected to destabilization, pollutant degradation and solid-liquid separation treatment, and finally, the reinjection or reuse requirements are met. And the high-voltage pulse power supply (4) and the low-voltage direct-current power supply (8) respectively provide loading power for the plasma destabilization device (3) and the electro-Fenton reactor (7).

Description

technical field [0001] The invention belongs to the field of environmental engineering wastewater treatment, and relates to a wastewater treatment technology, in particular to a plasma combined treatment system and method for polymer- and gel-containing wastewater. Background technique [0002] Most of my country's oil fields have entered the middle and later stages of development, and various measures need to be taken for production wells, such as fracturing and acidification, polymer flooding, etc., to increase the output of oil and gas fields, and changes in the quality of crude oil have resulted in a large amount of wastewater containing polymers and gums downstream On the other hand, in order to ensure national energy security, my country has increased the exploitation of unconventional energy such as shale gas and coalbed methane at the same time, and this type of energy exploitation process will also inevitably produce a large amount of polymer-containing and rubber-con...

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Problems solved by technology

[0003] There are many types of pollutants in polymer-containing and colloid-containing wastewater, with complex components and certain salts. This type of wastewater forms a stable heterogeneous thermodynamically stable system. At present, it is mainly treated by traditional gel-breaking combined treatment processes, including coagulation and sedimentation, Chemical oxidation method, Fenton oxidation method, etc., but the traditional gel breaking and destabilizing treatment process generally faces the following problems: ①The dosage of chemicals is large, and the gel breaking and destabilizing effect is poor: this type of wastewater contains a large amount of chemical agents and inorganic salts , the dispersion system formed is more stable, and the dosage of demulsification and gel breaking agents is doubled, some even as high as thousands of milliliters; It is difficult for the agent to penetrate and destroy effectively, and its oxidation and gel breaking generally take more than 30 minutes, or even several hours, which leads to a large area of ​​reaction equipment and increases the investment cost of equipment; In the face of process parameter adjustment, the effluent water quality fluctuates greatly; ④The wastewater treatment process is easily affected by the external environment, such as ambient temperature, which results in poor mud-water separation in the subsequent process and affects the water quality of the effluent

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