Return-flow type iron-carbon micro-electrolysis-coupling Fenton water treatment reaction device

Abstract

The invention discloses a return-flow type iron-carbon micro-electrolysis-coupling Fenton water treatment reaction device, which comprises an iron-carbon micro-electrolysis-coupling Fenton reactor, a return tank and a dosing pipeline mixer. The return-flow type iron-carbon micro-electrolysis-coupling Fenton water treatment reaction device is characterized in that a water inlet pipeline is arranged on the lower part of one side of the iron-carbon micro-electrolysis-coupling Fenton reactor, and an iron-carbon tank water outlet pipeline is arranged on the upper part of the other side of the iron-carbon micro-electrolysis-coupling Fenton reactor; waste water enters the dosing pipeline mixer to be fully mixed with H2O2, then enters the iron-carbon micro-electrolysis-coupling Fenton reactor, and enters the return tank via the iron-carbon tank water outlet pipeline; after the waste water stays for a period of time, one part of the waste water returns to the water inlet pipeline via a return pipeline, and the other part of the waste water is discharged. The iron-carbon micro-electrolysis-coupling Fenton reactor is filled with iron-carbon filler, the upper part of the iron-carbon micro-electrolysis-coupling Fenton reactor is provided with a feeding hole, and the lower part is provided with a reloading hole; the return tank is filled with small hollow plastic balls.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a reflux type iron-carbon micro-electrolysis-coupled Fenton water treatment reaction device for high-concentration refractory organic wastewater. Background technique [0002] Under the background of high industrial development, the pollution sources of high-concentration refractory organic wastewater are increasing day by day, which has brought serious pollution problems. The so-called "high concentration" refers to the high concentration of organic matter (in terms of COD) in this type of wastewater, generally above 2000mg / L, and some even as high as tens of thousands to hundreds of thousands of mg / L per liter; the so-called "refractory "It means that the biodegradability of this type of wastewater is low (BOD5 / COD values ​​are generally below 0.3 or even lower), and it is difficult to biodegrade. The superposition of the two characteristics of "high concentration" and "difficu...

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Problems solved by technology

For example, Chinese patent 201420128881.0 discloses a multi-stage iron-carbon micro-electrolysis coupled Fenton oxidation bed reactor, which solves the problem of unsatisfactory removal of refractory and complex organic pollutants caused by traditional coking wastewater treatment process to a certain extent. For some problems, it is extremely effective for the treatment of refractory polycyclic and heterocyclic organic substances and toxic and harmful substances in wastewater, but the multi-level iron-carbon mixture in the reactor is closely connected, which is easy to cause packing compaction, which increases the flow state of the internal wastewater. Difficulty in materials, thereby limiting its wide application; Chinese patent 201520130858.X discloses an iron-carbon micro-electrolysis-Fenton-like experimental device, which is mainly aimed at laboratory wastewater treatment, and to a certain extent provides test parameters for subsequent industrial applications, Theoretical basis and technical guidance, but there are problems such as uneven feeding and inaccurate control of water quality characteristics in the device; Chinese patent 201410585310.4 discloses an electrolytically coupled Fenton-like water treatment device, which promotes the iron micro-electrolysis reaction to a certain extent and overcomes the The problem of packing compaction, high reaction efficiency, and good sewage treatment effect, etc., but the structure is complex, the operation management is relatively cumbersome, and the operating cost increases accordingly, which is not conducive to practical application and promotion

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