In daily life, we often see the formation of scale on the inner wall of a kettle after prolonged use. What is the reason for this? Originally, the water we used contained many inorganic salts, such as calcium and magnesium salts. These salts cannot be detected by the naked eye in water at room temperature. Once they are heated and boiled, many calcium and magnesium salts precipitate as carbonates, and they adhere tightly to the pot wall to form scale. We usually use the indicator of "hardness" to represent the content of calcium and magnesium ions in water. hardness1Degree is equivalent to the content of water per liter10Milligrams of calcium oxide. below8Water with a certain degree is called soft water, which is higher than17The degree of hardness is called hard water, which is between8~17The water between degrees is called moderately hard water. Rain, snow, rivers, lakes are all soft water, while spring water, deep well water, and seawater are hard water.
working principle
Resin adsorption of calcium and magnesium ions in water
Applicable fields
Bathroom, kitchen, laundry, heating, boiler, etc
working principle
The hardness of water is mainly determined by its cation: calcium(Ca2+)Magnesium(Mg2+)Ionic composition.When raw water containing hardness passes through the resin layer of the exchanger, calcium and magnesium ions in the water are adsorbed by the resin, while sodium ions are released. In this way, the water flowing out of the exchanger is softened water with hardness ions removed,When the resin adsorbs calcium and magnesium ions to a certain saturation, the hardness of the effluent increases. At this time, the water softener will automatically regenerate the failed resin according to the predetermined program, using a higher concentration of sodium chloride solution(saline water)By using resin, the failed resin can be restored to sodium type resin.
The function of softening water
Applicable fields of softened water:In various fields such as bathrooms, kitchens, laundry, heating, boilers, and water supply for central air conditioning equipment.
Soft water has the following functions:
(1)Prevent household appliances such as water pipes, water heaters, coffee machines, humidifiers, steam irons, bathtubs, showerheads, and flush toilets from accumulating scale, frequently clogging, and having low thermal efficiency.
(2)Brewing coffee and brewing tea leaves has a unique taste and pure flavor. Nurture flowers, extend flowering period, leave no spots on green leaves, and have vibrant flowers. Fish farming to prevent various fish diseases. Soft water cooked rice is full, fluffy, and has a good taste; Sanitary appliances, crystal clear, without stains or spots.
(3)The shelf life of tofu is extended, and soybean milk is more fragrant. The bean sprouts do not need auxin and grow strong. Wash vegetables, remove pesticide components, and extend the shelf life of vegetables. Cooking rice shortens the time, the rice grains are soft and smooth, and the noodles are not easily swollen. Cooking to maintain the natural taste and nutritional content of vegetables.
(4)Effectively inhibit fungi, promote wound healing, reduce the incidence of constipation, gastrointestinal and stone related diseases. When accidents such as skin injuries, frostbite, burns occur, etc., first wash the affected area with soft water, then soak degreased cotton, gauze, towels, etc. with soft water, gently wipe the affected area, which can quickly heal the wound and make the swelling caused by burns disappear immediately. This is because soft water has the effect of promoting cell tissue regeneration. It can effectively inhibit fungi and promote cell tissue regeneration. When accidents such as skin injuries, frostbite, burns, etc. occur, washing with soft water can quickly heal the wound.
(5)Laundry, prevent static electricity, discoloration, and deformation, clean tableware, clean without water stains, and improve the glossiness of utensils. Clean the kitchen and bathroom, effectively remove dirt and odors. Has strong cleaning power. Soft water washing clothes fibers will not become hard or brittle, saving washing supplies.
(6)Soft water fundamentally eliminates water alkali, ensuring safe operation of equipment, saving expenses, and reducing maintenance costs for water equipment and pipelines60%Above, reduce hot water fuel costs30%Above, reduce detergent purchase costs50%The above.
