Internal-circulation type iron-carbon micro-electrolysis reactor

Abstract

The invention discloses an internal-circulation type iron-carbon micro-electrolysis reactor. The reactor structurally comprises a cylinder body (1), a water inlet pipe (2), a water distributor (3), an air inlet pipe (4) and an internal circulation pipe (5); waste water flows through the water inlet pipe (2) and the water distributor (3) in sequence and is dispersed into iron-carbon filler (a) which is located on the lower portion of the cylinder body (1), and in the process of being in contact with the iron-carbon filler (a), the waste water is purified unceasingly till post-purification water is formed and drained out of a water outlet (6) of the cylinder body; air enters the iron-carbon filler (a) at the bottom of the cylinder body (1) through the air inlet pipe (4), and aeration bubbles moving upward are formed; the aeration bubbles drive the iron-carbon filler (a) to pass through the internal circulation pipe (5) and be discharged into the post-purification water; the iron-carbon filler (a) keeps on being sedimentated till falling back to an accumulation bed of the iron-carbon filler (a), thereby an aeration cycle of the iron-carbon filler (a) is formed. It is thus clear that by means of the internal-circulation type iron-carbon micro-electrolysis reactor, the energy consumption is low, the abrasion is little, the operation is simple, and the waste water can be disposed in a continuous and highly-efficient mode.

Description

technical field [0001] The invention relates to the field of electrochemical sewage treatment devices, in particular to an internal circulation type iron-carbon micro-electrolysis reactor. Background technique [0002] In sewage treatment, iron-carbon micro-electrolysis mainly refers to mixing iron filings and carbon particles into an iron-carbon bed in which iron and carbon are in close contact. When the sewage to be treated passes through the iron-carbon bed, active iron will form an anode, and The inert carbon will form the cathode, which will constitute countless micro-primary batteries in the sewage, and a series of electrochemical redox reactions will occur at the two poles of the micro-primary batteries, so that the purpose of degrading the pollutants in the sewage can be achieved. Iron-carbon micro-electrolysis not only has the advantages of low cost, high treatment efficiency, and convenient operation and management, but also can treat various organic sewage with hi...

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Problems solved by technology

[0003] At present, the existing iron-carbon micro-electrolysis technology has at least the following disadvantages: (1) Iron filings are easy to passivate and harden, and eventually completely clogged, which will cause the iron-carbon bed to lose its sewage treatment capacity

(2) Iron filings are easy to be consumed quickly, and the remaining carbon particles need to be taken out frequently and refilled after mixing with new iron filings, which is time-consuming and laborious

(3) Iron ions tend to form precipitation when the pH is high, and the precipitation will block the gaps in the iron-carbon bed, thereby greatly reducing the sewage treatment effect of the iron-carbon bed

In order to solve these problems, iron-carbon micro-electrolysis technology based on pump reflux stirring and iron-carbon micro-electrolysis technology based on agitator stirring have appeared in the prior art, but these two technologies have high energy consumption, large wear, and low processing efficiency. question

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