Powder activated carbon liquid in-situ regeneration method based on vacuum ultraviolet/chlorine/ultrasonic coupling effect

A powder activated carbon, vacuum ultraviolet technology, applied in separation methods, filter regeneration, chemical instruments and methods, etc., can solve the problems of high energy consumption, secondary pollution, large carbon loss, etc., to improve regeneration efficiency and reduce regeneration facilities. , strengthen the effect of desorption

Pending Publication Date: 2021-11-23
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a liquid in-situ regeneration method of powdered activated carbon based on vacuum ultraviolet light / chlorine / ultrasonic coupling, and constructs a liquid in-situ regeneration method of powdered activated carbon based on vacuum ultraviolet light / chlorine / ultrasonic coupling to solve the problem of saturated powder activated carbon. The thermal regeneration process requires professional regeneration manufacturers, dehydration and drying, high energy consumption, large carbon loss, secondary pollution and other problems, which significantly improve the efficiency of vacuum ultraviolet rays, chlorine, and ultrasonic regeneration alone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: Add the regeneration solution of 0.05mM sodium hydroxide to the saturated powdered activated carbon concentrate that absorbs Rhodamine B at a concentration of 2000mg / L, and stir at 120rpm to form a powdered activated carbon mixed solution. Add 0.2mM sodium hypochlorite to the powdered activated carbon mixture, irradiate with vacuum ultraviolet rays with a power of 20W / L and a wavelength of 185mm, and at the same time act on ultrasonic waves with a frequency of 40kHz and a power of 90W / L for 30min, then separate and clean the regenerated powdered activated carbon , The obtained wet-type regenerated powdered activated carbon can be directly reused in the water treatment process. The adsorption capacity of the new carbon is 1360mg / g. After the regeneration treatment, the adsorption capacity of the powdered activated carbon is restored to 1156mg / g, and the regeneration rate reaches 85%.

Embodiment 2

[0015] Embodiment 2: Add the regeneration solution of 0.05mM hydrochloric acid in the saturated powdered activated carbon concentrate that absorbs aniline at a concentration of 5000mg / L, and continue stirring at 160rpm to form a powdered activated carbon mixed solution. Add 0.1mM ammonium chloride to the powdered activated carbon mixture, conduct 40kHz frequency, 180W / L power ultrasonic wave for 5 minutes, then increase 20W / L power, 185mm wavelength vacuum ultraviolet irradiation, and the combined action time of ultrasonic wave and vacuum ultraviolet light is 45min . Then the regenerated powdered activated carbon is separated and washed, and the obtained wet-type regenerated powdered activated carbon can be directly reused in the water treatment process. The adsorption capacity of the new carbon is 55.53mg / g. After the regeneration treatment, the adsorption capacity of the activated carbon is restored to 52.75mg / g g, the regeneration rate reaches 95%.

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Abstract

The invention discloses a powder activated carbon liquid in-situ regeneration method based on a vacuum ultraviolet/chlorine/ultrasonic coupling effect, and belongs to the technical field of water treatment and pollution removal. According to the method, vacuum ultraviolet rays, chlorine and ultrasonic waves are subjected to a synergistic effect, and the powder activated carbon liquid-state in-situ regeneration method based on the vacuum ultraviolet ray/chlorine/ultrasonic wave coupling effect is constructed. The method comprises the following steps: adding a regeneration solution into a saturated powdered activated carbon concentrated solution to form a powdered activated carbon mixed solution, then adding a chlorine solution, carrying out vacuum ultraviolet irradiation, respectively and successively conducting treatment or simultaneously conducting treatment for a certain time under the action of ultrasonic waves with certain power and frequency, and directly recycling the separated and cleaned wet-type regenerated powdered activated carbon. The vacuum ultraviolet/chlorine/ultrasonic coupling can form multiple synergistic effects, so that the desorption, migration and degradation efficiency of pollutants in the powdered activated carbon is enhanced. The powdered activated carbon can be directly regenerated and recycled in a liquid phase, the regeneration effect is obviously improved, few regeneration facilities are added, the feasibility is high, and the application potential is large.

Description

technical field [0001] The invention belongs to the technical field of water treatment and pollution removal, and in particular relates to a method for regenerating saturated powder activated carbon Background technique [0002] Powdered activated carbon has the characteristics of developed pore structure and large specific surface area, and can effectively adsorb various pollutants in water. It has been widely used in the field of water treatment and pollution removal. Due to the large amount of powdered activated carbon used and the high cost of use, the regeneration and reuse of powdered activated carbon has significant economic benefits. The thermal regeneration method is currently the most widely used and mature activated carbon regeneration method in the industrial field, but it requires professional regeneration manufacturers and regeneration equipment, and there are problems such as high energy consumption, large carbon loss, and secondary pollution of tail gas. It i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C02F1/28
CPCB01J20/3416B01J20/3475B01J20/3441C02F1/283C02F2303/16
Inventor 杨艳玲于瑞李星周志伟
Owner BEIJING UNIV OF TECH
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