Powder activated carbon low-temperature heat-liquid phase in-situ regeneration method based on continuous frequency conversion ultrasonic wave/ozone solution coupling effect
The technology of powder activated carbon and frequency conversion ultrasonic wave is applied in the field of water treatment, which can solve the problems of high energy consumption and secondary pollution of exhaust gas, and achieve the effects of high contact efficiency, improved utilization efficiency, and good scope of application.
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Embodiment 1
[0020] Example 1: Add a regeneration solution of 0.05mM sodium hydroxide to the saturated powdered activated carbon concentrate that absorbs p-chlorophenol at a concentration of 5000mg / L, stir at 120rpm, and heat the regeneration solution to 70°C to form a low-temperature hot mixed solution . Add ozone solution to the low-temperature thermal mixture, the concentration of ozone in the low-temperature thermal ozone mixture is 1 mg / L, and continue stirring at 100 rpm for 5 minutes to form a low-temperature thermal ozone mixture of powdered activated carbon. Turn on the frequency conversion ultrasound, the total time of ultrasonic action is 45min, of which, the continuous frequency conversion cycle interval of the ultrasonic wave in the 0-5min time period is 20-40kHz, and the cycle period is 5min; the continuous frequency conversion cycle interval of the ultrasonic wave in the 5-30min time period is 35-100kHz , the cycle period is 5min; the ultrasonic continuous frequency conversi...
Embodiment 2
[0021] Example 2: Add a regeneration solution of 0.05mM hydrochloric acid to the saturated powdered activated carbon concentrate that absorbs active blue 81 at a concentration of 2000mg / L, and stir at 120rpm, and heat the regeneration solution to 50°C to form a low-temperature hot mixed solution. Add ozone solution to the low-temperature thermal mixture, the concentration of ozone in the low-temperature thermal ozone mixture is 0.5 mg / L, and continue stirring at 100 rpm for 5 minutes to form a low-temperature thermal ozone mixture of powdered activated carbon. Turn on the frequency conversion ultrasound, and the ultrasonic action time lasts for 30 minutes. Among them, the ultrasonic continuous frequency conversion cycle interval is 20-40kHz at 0-5min, and the ultrasonic continuous frequency conversion cycle is 2.5min; the ultrasonic continuous frequency conversion cycle interval is 35 when the action is 5-30min. -100kHz, the cycle period of ultrasonic continuous frequency conve...
Embodiment 3
[0022]Example 3: A regeneration solution of 0.1 mM sodium hydroxide is added to the saturated powdered activated carbon concentrate that absorbs acetone at a concentration of 5000 mg / L, stirred at 150 rpm, and the regeneration solution is heated to 80° C. to form a low-temperature hot mixed solution. Add ozone solution to the low-temperature thermal mixture, the concentration of ozone in the low-temperature thermal ozone mixture is 0.5 mg / L, and continue stirring at 100 rpm for 5 minutes to form a low-temperature thermal ozone mixture of powdered activated carbon. Turn on the frequency conversion ultrasound, the ultrasonic action time lasts for 5 minutes, the continuous frequency conversion cycle interval of the ultrasonic wave in the 0-5min period is 20-40kHz, and the cycle period of the continuous frequency conversion of the ultrasonic wave is 5min. The treated powdered activated carbon is separated and reused directly. The powdered activated carbon material used is wood, th...
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