Catalytic filler for Fenton fluidized bed and preparation method thereof

Abstract

The invention relates to a catalytic filler for a Fenton fluidized bed and a preparation method thereof, belonging to the field of wastewater treatment. The catalytic filler for the Fenton fluidized bed includes a porous suspension filler and a catalyst layer; the catalyst layer is coated on the surface of the porous suspension filler; the catalyst layer includes a metal salt with Fenton reaction catalytic activity, activated carbon, As for the binder, the weight ratio of the metal salt, activated carbon and binder is 0.3-1.2:6:1.0-1.5, and the loading of the metal salt on the activated carbon is 5-20%. The catalytic filler for the Fenton fluidized bed of the present invention has a huge catalytic area, can effectively improve the oxidation efficiency and utilization rate of hydrogen peroxide, can reduce the ineffective decomposition of hydrogen peroxide, reduce the output of iron-containing sludge, and improve the sewage treatment effect , Reduce dosage of chemicals and operating costs.

Description

technical field [0001] The invention relates to a catalytic filler for a Fenton fluidized bed and a preparation method thereof, belonging to the field of wastewater treatment. Background technique [0002] Fenton oxidation is a widely used high-efficiency wastewater treatment technology, which is characterized by hydrogen peroxide (H 2 o 2 ) in Fe 2 + A large number of highly oxidizing hydroxyl radicals (·OH) can be generated under the catalytic action of the catalyst. In practical engineering applications, the Fenton fluidized bed technology applies the Fenton reaction to the fluidized bed reactor system, which greatly improves the Fenton efficiency, and has the advantages of simple operation, convenient use, and rapid response. The Fenton fluidized bed is especially suitable for the treatment of organic wastewater containing refractory biodegradation, and has been gradually applied to the treatment projects of landfill leachate, dyes, pulp and paper, daily chemicals, p...

AI Technical Summary

Problems solved by technology

However, the fillers used in Fenton fluidized beds generally have problems such as small catalytic area, high density, difficulty in fluidization, uneven size, and difficulty in adjusting the size.

For example, quartz sand, zeolite, iron-carrying ceramsite, etc. are used as Fenton fluidized bed fillers, and the specific surface area is small, so the catalytic area is small, and the catalytic effect is not ideal; the particle density is high, and a high ascending flow rate is required to make it It is in a fluidized state, so the power consumption is relatively high

In addition, when natural quartz sand, zeolite, etc. are used as fillers, the particle size of the fillers is difficult to achieve uniformity, resulting in uneven fluidization state in the bed, and the particle size cannot be adjusted according to the actual wastewater treatment needs, which also affects the Fenton fluidized bed. The processing effect

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