Sewage treatment equipment of dispersing and recovering photocatalyst by magnetic field

Abstract

The sewage treating plant capable of dispersing and recovering photocatalyst magnetically as one environment protecting facility features the utilization of the magnetism of the composite photocatalyst particle. The conic photoreactor has one proper accumulating angle in the lower part, annular air blowing pipe in the bottom, ultraviolet lamp tube in the middle, outer annular magnet driven to reciprocate up and down, and magnetic photocatalyst particles, which are first raised to some height under the action of the magnetic field, and then dispersed and fallen owing to the reduced magnetic force and further dispersed in the bottom before further raised magnetically, reaching uninterrupted dispersion. Compared with mechanical dispersion, the magnetic dispersion has lower photocatalyst consumption, increased sewage treating amount, recovery and reuse of the photocatalyst and lowered sewage treating cost.

Description

technical field [0001] The invention belongs to the field of environmental protection, and particularly relates to a photocatalytic sewage treatment device, which uses a magnetic field to fully disperse and recycle magnetic photocatalyst particles, thereby greatly improving the utilization rate of the photocatalyst. Background technique [0002] Environmental pollution has caused great harm to the survival and development of human beings, especially the shortage and pollution of water resources have seriously affected people's life and production, so the purification of sewage has become an urgent problem to be solved. [0003] Compared with traditional sewage treatment methods, photocatalytic degradation of pollutants in sewage has many unique advantages. The most studied TiO 2 Semiconductor photocatalytic material, its bandgap energy is 3.0-3.2eV, equivalent to photon energy with a wavelength of 387.5nm, it can effectively degrade various organic pollutants, and finally g...

AI Technical Summary

Problems solved by technology

[0004] TiO now used in sewage treatment 2 There are still many problems, mainly the low utilization rate of sunlight and the difficulty of repeated and dispersed utilization.

nano TiO in suspended phase 2 Particles have the largest surface area, so they have the highest photocatalytic activity, but dispersed particles are easy to sink, easy to lose, difficult to disperse evenly and recycle and reuse

Commonly use mechanical stirring to disperse TiO 2 The method of photocatalyst particles has many defects that are difficult to overcome, such as easy to form a stirring center, the particles cannot be dispersed to the middle and upper parts under the action of gravity, it is difficult to effectively disperse when there is little photocatalyst, and the particles are easily broken by mechanical stirring, etc.

Images