System and method for purifying sewage by powdered active carbon

Abstract

The invention discloses a system and a method for purifying sewage by powdered active carbon. The system comprises a carbon adding device, a mixing treatment device, a carbon-water separation device, a backwashing device, a control system and a power supply module. The method comprises the following steps: sufficiently mixing the powdered active carbon with the sewage and feeding a mixture into the carbon-water separation device by a feeding pump to be subjected to carbon-water separation; then detecting a water inlet and outlet pressure difference of the carbon-water separation device according to a pressure controller; automatically starting the backwashing device to carry out backwashing on a hollow micro-pore filtering pipe; and finally, closing the backwashing device and opening a coal slurry outlet solenoid valve; discharging the coal slurry; and activating after dehydrating and drying. The system and the method disclosed by the invention can be used for purifying the sewage by using the powdered active carbon; equipment is simple and easy to operate and low in operation cost; the separated powdered active carbon is intensively recycled; the continuous operation time of the equipment is long, the backwashing time is short and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and relates to a system and method for purifying sewage by using powdered activated carbon. [0002] Background technique [0003] Powdered activated carbon purification technology has a history of treating water for 70 years. Since the first application of powdered activated carbon in the United States to eliminate the smell of chlorophenols, the effective way to remove impurities in water is still activated carbon purification technology. The effect has been approved by many countries. [0004] Activated carbon can be divided into powder activated carbon or granular activated carbon according to its appearance and shape. Generally, more than 90% of the activated carbon that passes through the 80-mesh standard sieve or the particle size is less than 0.175mm is generally called powdered activated carbon or powdered carbon, and the activated carbon with a particle size greater th...

AI Technical Summary

Problems solved by technology

Compared with granular activated carbon, powdered activated carbon has the advantages of easy preparation, relatively low price, strong adsorption capacity, fast adsorption speed, and sufficient adsorption capacity, but requires a proprietary separation method, and the regeneration is difficult and expensive.

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