An integrated groundwater hardness removal device based on calcium carbonate recovery

Abstract

The invention provides a calcium carbonate recovery-based integrated underground water hardness removal device. The device comprises a shell (6) as well as a water inlet unit (1) a calcium carbonate enrichment recovery unit (2), a gas-water combined backwashing unit (3), a filter unit (4) and a water outlet unit (5), which are arranged in the shell in sequence from bottom to top. The device is compact in structure, small in floor space, convenient to use, flexible in operation and wide in application range, has the advantages of preferably ensuring the removal effect of the total hardness in the underground water and the integral effluent quality and effectively collecting the calcium carbonate separated out in the hardness removal process, and has relatively good popularization and application prospect.

Description

technical field [0001] The invention belongs to the field of water treatment equipment, in particular to an integrated groundwater hardness removal device capable of recovering calcium carbonate. 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...

AI Technical Summary

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

In response to the above problems, some new groundwater hardness removal agents (201310336486.1) and devices (201310336448.6) have been developed. Although the total hardness can be efficiently removed, there is a problem of difficulty in subsequent waste disposal.

Images