Efficient hardness removal method and device applicable to underground water

Abstract

The invention discloses efficient hardness removal method and device applicable to underground water, belonging to the field of water treatment technologies. The device is divided into a reaction zone, a diversion zone IV and a settling zone V from the inside to outside; a pitched blade type stirrer is arranged at the very center of the device and penetrates through the whole reaction zone; three groups of paddles are arranged on a rotation shaft of the stirrer from the bottom to top; the reaction zone is divided into three reaction control zones I, II and III from the bottom to top; the speed gradients G of the three zones are decreased in sequence; and four baffle plates are uniformly fixed on the inner wall of the reaction zone. The reaction process comprises the steps of respectively importing raw water and lime milk into the lower part of the reaction zone I through a water inlet pipe and a CaO addition pipe, importing a flocculating agent into the upper part of the reaction zone I through a flocculating agent addition pipe, ensuring the elevation f the water flow and the backflow process of the settling through the elevation function of the pitched blade type stirrer, completing the coagulation process during the lime softening process, and draining the clean water from a catch basin via a water outlet, wherein the precipitates are increased gradually along the long-time running of the reaction device, so that the part of the precipitates need to be discharged through a sludge removal emptying pipe at regular intervals.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method and a device suitable for efficiently removing groundwater hardness. Background technique [0002] my country's "Drinking Water Hygienic Standards" stipulates that the hardness standard of drinking water is 450mg / L (calculated as CaCO 3 count). The total hardness value of a lot of groundwater is between 300mg / L and 450mg / L. Although it does not exceed the specified standard, the calcium and magnesium ions in the water are still high, which is not good for human health, especially because of the HCO in the temporary hardness. 3 - In the presence of ions, there will be precipitation or floating matter after the water is boiled, which makes it unacceptable to the human senses. HCO 3 - Water with a relatively high ion content will produce more residues after heating and boiling, and the scaling of hot water supply pipelines and water containers will ...

AI Technical Summary

Problems solved by technology

[0006] The method and device are mainly aimed at the problems of complex lime softening process procedures, large floor area and low effective utilization rate of lime.

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