Method and horizontal continuous reaction apparatus for purifying and recycling circulating cooling water

Abstract

The invention discloses a method for purifying and recycling circulating cooling water. The circulating cooling water is evaporated, then undergoes primary purification in a high-voltage direct current electrostatic field, and then undergoes secondary purification in a high-frequency dielectric barrier discharge plasma recovery electric field; and the obtained purified condensed water is recoveredinto a cooling water circulating system. The invention also discloses a horizontal continuous reaction apparatus. The apparatus includes a cooling tower, a primary purification device and a secondarypurification device which are all closed; the cooling tower is communicated with the primary purification device through a pipeline, and the primary purification device is communicated with the secondary purification device; the bottom of each of the primary purification device and the secondary purification device is provided with a water outlet, and the water outlets are communicated with the cooling tower; a corona electrode and an electrode plate which are respectively correspondingly connected with the negative electrode and the positive electrode of a direct current power supply are arranged in the primary purification device; and first discharge electrode plates and second discharge electrode plates, which are correspondingly respectively connected with the high voltage end and thelow voltage end of a power supply, are arranged in the second purification device. The whole system cyclically runs, and the recovery rate of the circulating cooling water reaches 90% or above.

Description

technical field [0001] The invention belongs to the field of purification and recovery of circulating cooling water, and relates to a method for purifying and recovering circulating cooling water by dielectric barrier discharge plasma coupled with direct current static electricity, and a horizontal continuous reaction device for purifying and recovering circulating cooling water. Background technique [0002] The relative scarcity and uneven distribution of water resources have a great impact on an industrial area with a large demand for industrial water consumption. Among them, the consumption of circulating cooling water accounts for 50% to 90% of the annual water consumption of enterprises. The circulating cooling water system is widely used in In petrochemical, electric power, steel, metallurgy and other industries, a large amount of water vapor will inevitably be discharged into the atmosphere when the system is working, and the water evaporation per hour is about 1.5% t...

AI Technical Summary

Problems solved by technology

At present, the plasma recovery circulating cooling water technology in practical application is mostly a vertical reaction device that combines plasma and condensation system and has a relatively simple structure. The consumption is large, and the impurities are easy to fall back into the circulating cooling water under the action of gravity during the treatment process. This method and the structure of the device are not conducive to the capture and degradation of the nucleating substances in the aerosol.

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