High-efficiency electrocoagulation device for sewage treatment

Abstract

The invention relates to the technical field of sewage treatment equipment, and particularly relates to a high-efficiency electrocoagulation device for sewage treatment. A cell body is an insulated cell body, and the cell body is internally provided with an electrode flocculation device; the electrode flocculation device is formed by stacking a plurality of electrode flocculation modules in the cell body; the electrode flocculation module A is formed by installing a plurality of parallel electrode plates in a reticular basket; the inner surfaces of both ends of the cell body are provided with a No.1 pole plate and a No.2 pole plate; a slag scraping device is arranged above the electrode flocculation device, and the slag scraping device is formed by driving a slag scraping shaft through a motor; the slag scraping shaft is provided with a flexible slag scraping plate; the cell body, which is positioned on one end of the electrode flocculation device, is internally provided with a conical floating slag containing area; the conical floating slag containing area is communicated with a slag discharge cell through a No.1 channel; and the bottom of the slag discharge cell is provided with a slag discharge port, so that waste water is electrolyzed for more than two times to be sufficiently treated, the stability is prevented from being influenced due to the change of a water inlet source, and the quality of effluent water is ensured. The high-efficiency electrocoagulation device disclosed by the invention has the advantages of easiness and convenience for operation, stability in operation, small occupied area, energy conservation and convenience for scientific management.

Description

Technical field: [0001] The invention relates to the technical field of sewage treatment equipment, in particular to a high-efficiency electrocoagulation device for sewage treatment. Background technique: [0002] With the development of automobiles, electroplating, household appliances, aviation, aerospace industry, construction industry and corresponding decoration industry, my country's electroplating industry is facing huge opportunities for development. According to incomplete statistics, there are more than 10,000 electroplating factories in my country, and the annual discharge of electroplating wastewater reaches 4 billion cubic meters. The current development of circular economy is of great significance to improving resource utilization and building a resource-saving and environment-friendly society. Resource reduction, reuse, and recycling are the three basic principles of implementing circular economy, comprehensive utilization of resources, and clean production. ...

AI Technical Summary

Problems solved by technology

By continuously repeating power supply-power-off-power supply, the electrolysis efficiency is greatly improved, the pulse time is less than the total reaction time of electrolysis treatment, and the dissolved amount of iron ions is greater than that of DC electrolysis. Therefore, pulse electrolysis and DC electrolysis phase Compared with power saving, it is also greatly reduced, but when the voltage of the electrolytic cell is too low, the current output will increase according to the change of the water body of the electrolytic bed, and the energy consumption will increase. At this time, the reactive power is released on the module, causing the power supply Thyristors are prone to breakdown and failure, using high-frequency pulses; high frequency, high energy consumption, prone to failure,

[0009] 2. Traditional DC electrolysis technology: During the electrolysis process, the current is oxidized through parallel metal electrodes, that is, the pollutants are directly oxidized by losing electrons at the anode, and the anion with a lower electrode potential in the solution is used to lose electrons at the cation to generate new The strong oxidizing active substances play the role of oxidative decomposition to reduce COD NH3-N in raw water. Since electrolysis requires power supply for each plate, the current density is high and the current is relatively high, so there is energy High energy consumption, fast plate consumption, and easy passivation of the plate. Using DC electrolysis, the processing efficiency is relatively low, and the fouling of the plate is difficult to overcome, which leads to a rapid decline in the treatment efficiency affected by passivation, consumes a lot of energy, and causes an increase in energy consumption.

However, the chemical potential of many ions in water is very high, and it is difficult to break the molecular bonds in water if the voltage is too low. Only a high current method is used to deal with it, and the current density is high, and the voltage will decrease, so there will be high energy consumption. consumption fast defect

Using low-voltage pulse, the investment and operating costs are low, but the treatment effect is not good, it does not meet the environmental protection policy of energy conservation and emission reduction advocated by our country, and it is difficult to implement; at present, there are problems of excessive resistance in electrocoagulation and the plate is easily blocked and passivated. Temporarily There is no good solution. The above processes have disadvantages such as high energy consumption, unstable operation, low treatment effect, inconvenient operation, and large equipment investment; there are many problems such as great safety hazards.

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