Iron-carbon micro-electrolysis reaction system of multistage fluidized bed

Abstract

The invention discloses an iron-carbon micro-electrolysis reaction system of a multistage fluidized bed. The iron-carbon micro-electrolysis reaction system comprises a reactor, wherein a water distribution chamber which is provided with a lower circulating water gap is arranged on the lower part of the reactor; an upper circulating water gap is formed on the upper part of the reactor; the lower circulating water gap is communicated with the upper circulating water gap through a pipeline; an internal circulating pump is arranged on the pipeline; the upper space in the reactor is divided into aplurality of reaction chambers laminated from top to bottom by a plurality of screen mesh clapboards; and the reaction chambers are positioned above the water distribution chamber. According to the iron-carbon micro-electrolysis reaction system, the reactor is divided into a plurality of stages of reaction chambers by the screen mesh clapboards, so that an iron-carbon filler can be placed in the reaction chambers stage by stage, the reaction environment of the filler is improved, a condition that the filler can be hardened because a plurality of layers of filler is stacked is avoided, and themicro-electrolysis effect is optimized. The iron-carbon micro-electrolysis reaction system can be used as an iron-carbon micro-electrolysis reaction device in the waste water treatment industry.

Description

technical field [0001] The invention relates to an iron-carbon micro-electrolysis reactor used in environmental protection projects. Background technique [0002] The iron-carbon micro-electrolysis method is a good method to treat wastewater by using the reaction principle of Fe / C primary battery, also known as internal electrolysis method, iron filings filtration method, etc. Sedimentation and co-precipitation are integrated into one. As a pretreatment technology before biochemical treatment, iron-carbon micro-electrolysis technology can not only degrade a large amount of organic matter in wastewater, but also reduce its toxicity and improve the biodegradability of wastewater. This method has many advantages such as wide application range, good treatment effect, long service life, low cost and convenient operation and maintenance. As a treatment method using scrap iron scraps as raw materials, it has the meaning of "treating waste with waste". Due to its various advantage...

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Problems solved by technology

This phenomenon seriously reduces the contact area between the filler and the waste water, which makes the electrode reaction difficult to proceed and seriously affects the service life of the reactor. In particular, due to multi-layer stacking, the lower layer is under too much pressure from the upper layer, which aggravates the hardening situation;

[0005] (2) Low packing efficiency: conventional reactors use iron-carbon sintered composites as fillers. During the reaction process, iron is continuously replaced and consumed, but only a small amount of carbon is lost. After a long period of reaction, the ratio of iron and carbon is seriously out of balance, which seriously affects the use of fillers. efficacy

At the same time, the specific surface area of ​​the sintered filler is much lower than that of the combined filler of iron filings and carbon powder, which affects the utilization rate of the filler to a certain extent;

[0006] (3) It is difficult to replace the packing: the packing with fixed iron-carbon mixing ratio is used. After a long time of operation, the packing bed needs to be replaced as a whole to maintain a stable iron-carbon ratio. During this process, the remaining packing in the reactor must be cleaned and refilled with new packing. Significantly increases the difficulty of reactor maintenance and also increases the processing cost

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