Energy self-sustaining strong oxidation device and method for high-organic-matter-concentration difficult-to-treat wastewater

Abstract

The invention relates to an energy self-sustaining strong oxidation device and method for high-organic-matter-concentration difficult-to-treat wastewater, which belong to the field of wastewater treatment. The high-difficulty wastewater to be treated is subjected to PH regulation and filtration; after being pressurized by the turbine increasing device, the water is conveyed to the high-pressure heat exchange device by the water feeding pump, liquid-phase indirect heat exchange with high-temperature and high-salinity wastewater in the device is carried out, the high-temperature high-difficultywastewater subjected to heat exchange is fed into a catalytic oxidation device, oxygen is introduced at the same time, oxygen and organic matters in the wastewater are subjected to catalytic oxidationreaction, the reaction releases heat to further heat the wastewater and maintain the reaction temperature, wastewater flows through a baffling channel in the catalytic oxidation device to strengthenmass transfer and regulate and control reaction time, the high-temperature and high-pressure wastewater subjected to the catalytic oxidation reaction is fed into a high-pressure heat exchanger for heat recovery, cooled and then fed into the turbine increasing device for mechanical energy recovery, and then sequentially enters a membrane separation device, a water purification tank, a polycrystalline seed crystallization device and a molten vitrification device for purification, concentration and recovery.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to an energy self-sustaining strong oxidation device and method for refractory wastewater with high organic concentration. Background technique [0002] The components of refractory wastewater with high organic concentration produced by petroleum, chemical, pharmaceutical, printing and dyeing, papermaking and other industries are very complex, not only containing aromatic compounds, heterocyclic compounds and other toxic and harmful high-molecular organic substances, the COD concentration is 60000mg / L or more; and the salinity in it is relatively high, some of the waste water contains more than 1% of the saline mass fraction, and the high salt and high organic content restrict the traditional biological treatment technology to achieve the purpose of complete degradation. [0003] At present, the main methods for treating refractory wastewater with high organic concen...

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Problems solved by technology

However, the method used in the above patents uses a large amount of energy for the evaporation of water, and the latent heat of vaporization consumes too much energy during the evaporation process, and the process is relatively complicated.

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