NFJ-series iron-carbon bed micro-electrolysis

Product introduction

     Iron-carbon bed micro-electrolysis is a new type of water treatment technology, which is mainly applied to organic wastewater that is difficult to biodegrade wastewater. Pretreatment of wastewater is a good process. It does not need an external power supply to generate its own potential difference for electrolytic treatment of wastewater to achieve the purpose of degrading organic pollutants.

     The NFJ-series iron-carbon bed micro-electrolytic filler produced by Beijing Jinke Composite Materials Co., Ltd. is modified by high-quality iron filings, and nano-attapulgite, polarized metal, and non-metal are added to form a special Raw material products for micro-electrolysis of iron and carbon in water treatment; and special activated carbon in the best ratio. After repeated tests of dozens of actual wastewaters, the formula is more reasonable: it eliminates the disadvantages of similar products that have obvious effects when they start to use, and the effectiveness gradually declines in the future, and the efficiency is longer after being used. In addition, the aerated micro-electrolysis reaction bed produced by our company makes the effect of micro-electrolysis treatment of wastewater more significant.

Mechanism of iron-carbon bed micro-electrolysis

     Iron releases iron ions under acidic conditions to generate new ecological Fe2 +. Fe2 + has an oxidation-reduction effect, and can undergo redox reactions with many components in the wastewater; destroy the colored organic groups in the decolorized wastewater to achieve the decolorization effect; for the refractory organic wastewater, the following electrochemical reactions occur, Degradation of organic matter; improved biodegradability of wastewater. The Fe2 + produced is adjusted to adjust the pH value to further produce Fe3 +; Fe3 + is a good flocculant. Their hydrates and hydroxides have a strong adsorption and flocculation effect. Suspended substances, toxic substances, metal ions and large molecules dispersed in water pollution can be adsorbed-flocculated and precipitated.

The electrochemical reaction takes place as follows:

Anode (Fe): Fe-2e → Fe2 + E (Fe / Fe2 +) = 0.44V

Cathode (C): 2H ++ 2e → H2 E (H + / H2) = 0.00V

The redox reaction process is as follows:

O2 + 4H ++ 4e → 2H2O E (O2) = 1.23V

O2 + 2H2O + 4e → 40H- E (O2 / 0H-) = 0.41V

Fe2 ++ O2 + 4H + → 2H2O + Fe2 +

Comparison between traditional iron-carbon micro-electrolysis and NFJ-series iron-carbon bed micro-electrolysis

1. Comparison of micro-electrolytic filler

Traditional micromotor fillers use iron scraps or steel scrap wastes, mixed with ordinary activated carbon. This method is possible in the laboratory, but there are many shortcomings in practice.

★ The quality and thickness of iron scraps or steel scraps are different; it is difficult to cut and cut the scraps, resulting in different specifications of the iron raw materials, mixed with the active hair, uneven, easy to occur, the reaction effect can not be guaranteed;

★ For larger actual projects, iron filings or steel are often used for layer loading, which not only leads to uneven mixing of iron and carbon, but also affects the filamentous waste of steel filings into a fixed cuboid. The steel debris block will collapse and local compaction will occur, which will most affect the reaction effect. More importantly, after a period of operation, the cuboid will eventually make the water flow unable to pass evenly, making the reaction tank scrap.

★ The iron content of iron filings or steel scrap waste is low, the reaction rate is slow, resulting in large equipment, high operating costs, and troublesome management;

★ The reaction time of traditional iron-carbon micro-electrolytic filler is about 150mi, and the treatment effect on COD is only about 30%. After ten days of use, the treatment effect quickly decreased.

NFJ-series iron-carbon bed micro-electrolytic packing is a new type of product based on the summary of domestic and foreign carbon-depleting micro-electrolysis technology, which is aimed at some insurmountable technical defects of traditional fillers. Has the following advantages:

★ Iron raw material has high iron content and large specific surface area, which greatly improves the reaction speed;

★ Iron raw material is an industrial product with stable technical specifications. It is completely different from the scraps that are collected randomly in China, have large changes in iron content, and unstable quality.

★ Iron raw materials are mixed with granular and activated hair uniformly, and added regularly to avoid the shortcomings of ordinary iron filings that cannot be mixed with activated carbon uniformly and the utilization rate is low;

★ Adopt high-quality activated carbon that matches the performance of iron raw materials to improve the processing performance;

★ Design the best iron-carbon raw material formula according to different influent water quality to ensure the best treatment effect;

★ Fast response speed, greatly saving equipment investment and operating costs;

★ Jinke Company's iron-carbon filler has been running continuously for more than 180 days, and its treatment effect has no obvious decline.

2.Comparison of micro-electrolysis reactors

Traditional iron-carbon beds often use fixed-bed iron-carbon reactors. After this type of reaction device is operated for a period of time, iron filings tend to agglomerate, and ditch flow occurs, which greatly affects the treatment effect.

      The NFJ-series iron-carbon bed is an appropriate adjustment to the internal structure of a common reactor, which can easily transform a traditional fixed bed into a fluidized bed, and then add an aeration device to form an aerated micro-electrolytic reaction bed. This type of reaction device has the following technical advantages:

The aerated micro-electrolytic reaction bed overcomes the shortcomings of the surface of the fixed-bed iron-carbon reactor, which is easy to passivate, the packing is easy to agglomerate, and the running effect gradually decreases with the extension of the running time;

★ The aerated micro-electrolysis reaction bed adopts aeration form to make the filler in a fluidized state. During the fluidization, the filler particles can fully contact and rub, and the FezO3 precipitated on the surface of the filler is peeled off to prevent the precipitate from wrapping the filler and sticking the block;

★ The aerated micro-electrolysis reaction bed is easy to operate and does not cause secondary pollution to the surrounding environment;

★ After the iron raw materials of the aerated micro-electrolysis reaction bed are consumed, the automatic feeding device is used for regular feeding, which overcomes the biggest shortcomings of ordinary iron filings, which are difficult to replace when falling down;

★ The aerated micro-electrolysis reaction bed can realize the structure and equipment according to the scale and user requirements to meet a variety of needs.