A multi-stage enhanced catalytic redox aeration internal electrolysis reactor and its application

Abstract

The invention relates to a multistage intensified catalytic oxidation, reduction and aeration internal electrolysis reactor and an application thereof. The reactor is provided with a sedimentation layer (1), a water inlet and gas distribution layer (2), a multistage filler layer (3) and a water discharge layer (4) arranged from bottom to top sequentially, wherein the multistage filler layer (3) is filled with filler balls internally provided with internal electrolysis filler; when the reactor treats wastewater, acid is firstly added to to-be-treated wastewater, the pH value is adjusted to be 3, and then, the wastewater enters the reactor from the water inlet and gas distribution layer (2). Compared with the prior art, the reactor has the advantages of convenience in filler replacement, sufficient internal electrolysis reaction, space saving, good treatment effect and the like.

Description

technical field [0001] The invention relates to an internal electrolysis reactor and its application, in particular to a multi-stage enhanced catalytic redox aeration internal electrolysis reactor and its application. Background technique [0002] Micro-electrolysis is a primary battery composed of iron and carbon. Through the complex oxidation-reduction reactions on the positive and negative electrodes, the biodegradability of wastewater is improved by using the electrical enrichment, physical adsorption and flocculation of the primary battery itself, so as to achieve wastewater pretreatment. Purpose of processing. [0003] In recent years, there have been more and more researches on internal electrolysis in China, especially in the treatment of wastewater from electroplating, printing and dyeing, and chemical dyes, and have been widely used in engineering applications. However, most of the productive internal electrolysis reactors are filters. Some of them use steel-lined...

AI Technical Summary

Problems solved by technology

If iron filings are directly added from the top of the pool, the new iron filings and carbon particles cannot be fully mixed evenly, which will affect the treatment effect of internal electrolysis

If all the fillers are cleared out and the mixed new fillers are reloaded, this process will require a lot of work in the actual process, and at the same time require a large site, which is difficult to implement

[0006] (2) Blockage of the reaction column

Therefore, larger equipment must be provided in the project, which increases the investment cost.

[0008] (3) iron filings agglomeration

[0012] (5) After the project is enlarged, the processing effect decreases

Generally, most of the micro-electrolysis experiments carried out in the laboratory are in small containers, and the sewage can fully contact with the filler, and the reaction is relatively full; however, when micro-electrolysis is applied to actual projects, due to the enlargement of the reactor size, the reaction conditions Changes in the reaction process make it easy to occur short flow, dead angle, and iron filings compaction, resulting in insufficient reaction and a significant decline in the treatment effect

[0014] (6) High daily maintenance and operation costs

Whether it is a fixed bed or a stirred bed, there is a problem of iron filings hardening, which affects the treatment effect. The hardening problem brings great difficulties to the daily maintenance and operation of the equipment, resulting in increased maintenance costs and operating costs.

[0016] (7) High energy consumption and low processing efficiency

However, there are many deficiencies in ordinary micro-electrolysis reactors, which lead to poor mixing, mass transfer and diffusion effects in the actual engineering reaction process, resulting in increased energy consumption of supporting equipment, increased chemical consumption and equipment operating costs

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