Device and method for separating and recycling magnetic nanometer particles

Abstract

The invention discloses a device for separating and recycling magnetic nanometer particles. The device comprises a cylindrical container internally provided with one or more annular runners, and a drive device controlling rotation of the annular runners. One or more sets of processing units are divided on the cylindrical container in the circumferential direction of the cylindrical container. Each processing unit comprises a magnetic separation area, a transition area and a disengaging area. The bottoms of the runners located at the magnetic separation areas communicate with a solution inlet pipe. A solution outlet pipe is further arranged at the bottom of the cylindrical container. The bottoms of the runners located in the disengaging areas communicate with a mud discharging device. Strong magnets are arranged in the magnetic separation areas. The invention further discloses a method for separating and recycling the magnetic nanometer particles. The method comprises the steps that a magnetic nanometer particle solution passes through runners of an externally-added magnetic field from bottom to top; after magnetic nanometer particle magnetic mud with the preset thickness is attached to the runners, the runners are switched to the position without the externally-added magnetic field; and the magnetic mud disengaging from the interiors of the runners is collected. Continuous separation can be achieved, back flushing is not needed during recycling, operation is simple, and the production efficiency is high.

Description

technical field [0001] The invention relates to the field of water purification, in particular to a device and method for separating and recovering magnetic nanoparticles from water. Background technique [0002] Due to the reduction of particle size, the proportion of surface atoms is large, and the adsorption capacity is very strong, nanomaterials have high chemical reactivity. Their applications involve biopharmaceuticals, quality testing, water treatment, etc. After the material is used, it is not easy to recycle, which limits its application. [0003] The current magnetic separator is mainly divided into continuous type and batch type. The continuous type is mainly through continuous adsorption by the powerful magnetic field of the disk type, which has obvious adsorption effect, but it is difficult to scrape the magnetic mud from the disk with a scraper, and it is easy to wear the scraper, which is extremely inconvenient for maintenance and operation. . The intermitt...

AI Technical Summary

Problems solved by technology

The continuous type is mainly through continuous adsorption by the powerful magnetic field of the disk type, which has obvious adsorption effect, but it is difficult to scrape the magnetic mud from the disk with a scraper, and it is easy to wear the scraper, which is extremely inconvenient for maintenance and operation.

The intermittent type requires intermittent work to perform backwashing of magnetic particles. Backwashing dilutes the magnetic nanoparticle solution, making the concentration of the collected magnetic nanoparticle solution very low, and the process control is cumbersome

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