Processing method and equipment for softening hard water through electric flocculation

Abstract

The invention relates to the technical field of hard water softening treatment, and discloses a processing method and equipment for softening hard water through flocculation. The method orderly integrates a chemical precipitation method, an inclined tube precipitation method, and an electrodialysis technology, thus has a prominent effect on processing hard water, and has the advantages of low cost, simple process, large hardness reduction, and wide application range. In the equipment, an alkali feeding reaction tank, an electric flocculation reaction tank, an inclined tube precipitation tank, and a medium filtering system cooperate with each other to process hard water; the hard water is processed in the units mentioned above in sequence and is delivered among the units through overflowing; the hard water is effectively softened, the effect is good, the application range is wide, moreover, the water pump is not used, and the energy consumption is saved.

Description

technical field [0001] The invention relates to the technical field of hard water softening treatment, in particular to a treatment method and equipment for electrocoagulation softening hard water. Background technique [0002] The hardness of water is usually measured by converting all the salts in the water into calcium carbonate. As an important water quality index, hardness has attracted widespread attention in drinking water and industrial water. In daily life, the hardness of water is too high, and it can make the soap not foam and cause waste when used for washing; washing clothes with hard water can easily make the textile fibers hard and brittle and damaged; bathing with hard water and washing hair can cause astringent hair Sticky feeling; boiling beans and meat with hard water is not easy to cook; boiling water with hard water will easily cause scaling in the kettle, wasting more than 1 / 3 of fuel. In terms of human health, drinking high-hardness water is likely to...

AI Technical Summary

Problems solved by technology

The electroflocculation device gradually deposits impurities and metal ions in the water on the cathode through electrochemical reactions, and various components and compounds will tend to find the most stable state under the action of current, thus forming a non-colloid or non-dissolved state. solid matter, but a single electrocoagulation technique is poorly effective in removing soluble calcium and magnesium ions from wastewater

[0004] At present, various technologies such as chemical precipitation, ion exchange, nanofiltration, reverse osmosis, electrodialysis, and reverse electrodialysis can be applied to the softening of hard water, but each treatment technology has its limitations: 1) The ion exchange method is Use a specific cation exchange resin to replace the calcium and magnesium ions in the water with sodium ions, thereby avoiding the formation of scale with the increase of temperature. This method can reduce the hardness of water to 0, but the price of cation exchange resin is high. Use Short life, not suitable for large-scale hard water softening; 2) Membrane separation method refers to the use of nanofiltration membrane (NF) and reverse osmosis membrane (RO) to intercept calcium and magnesium ions in water, thereby fundamentally reducing the hardness of water, but This method has higher requirements on the inlet water pressure, and the equipment investment and operating costs are higher; 3) The chemical precipitation method is to add lime or a special precipitant to the water, and then filter it, which is mainly used to treat high-hard water with a large flow rate , but can only reduce the hardness to a certain range

Therefore, aiming at the defect of low hardness removal rate existing in the current hard water softening technology, inventing a hard water softening treatment method and equipment with high hardness removal rate is of great significance for the sustainable application of water resources and the protection of human health

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