A combined hardness removal device

Abstract

The invention provides a novel combined hardness remover which comprises a water inlet unit (1), a precipitate generation reaction unit (2), a filtering and separating unit (3), a water quality improvement unit (4) and a clean water tank (5) which are sequentially connected, wherein the water inlet unit (1) is connected with the lower part of the precipitate generation reaction unit (2); the filtering and separating unit (3) comprises an initial separating unit (31), a quartz sand filter layer (32) and a pebble layer (33) which are sequentially connected; the initial separating unit (31) is connected with the precipitate generation reaction unit (2); and the pebble layer (33) is connected with the water quality improvement unit (4). The device has the advantages of compact structure, small occupied area, flexible operation and wide application range, is convenient to use, can well ensure the total hardness removal effect in underground water and the integral effluent water quality, and has favorable popularization and application prospects.

Description

technical field [0001] The invention belongs to the field of water treatment equipment, in particular to a combined hardness removing device. Background technique [0002] Too high or too low water hardness will affect our human health, and it will also bring inconvenience to daily life. For example, when washing with hard water, it will react with soap to produce insoluble precipitates. In addition to affecting the washing effect, it will also make the fibers of the clothes hard, brittle and easily damaged. When washing hair with hard water, it will be astringent. The current "Drinking Water Sanitation Standard" (GB5749-2006) stipulates that the total hardness content in drinking water should be less than 450mg / L (calculated as CaCO 3 count). [0003] At present, the relatively mature hardness removal method in the field of drinking water treatment is to use the precipitation method to remove calcium and magnesium ions in the water. However, the commonly used pharmaceutic...

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Problems solved by technology

[0003] At present, the relatively mature hardness removal method in the field of drinking water treatment is to use the precipitation method to remove calcium and magnesium ions in the water. However, the commonly used pharmaceuticals such as calcium hydroxide, sodium hydroxide, and sodium carbonate require a long precipitation reaction time and slow reaction. Thorough, high residual concentration of calcium and magnesium ions, etc., will also lead to a significant increase in the pH of the product water

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