During the cementation of scale, a large number of heavy metal ions are often attached. If the container is used for brilliant drinking water, there will be a risk of excessive dissolution of heavy metal ions in drinking water.
Formation of scale
Water containing minerals such as calcium (Ca) and magnesium (Mg) salts is called hard water. Rivers, lakes, Wells and springs are hard water. Tap water is a river, lake or well water through the settlement, remove sediment, get the hemlock sterilization, also hard water. Fresh rain and snow, the water does not contain minerals, is “soft water”. When the water boils, some of it evaporates, and the calcium sulfate (CaSO4, gypsum is the calcium sulfate containing crystalline water), which is not well melted, settles down. The original dissolved calcium bicarbonate (Ca (HCo3) 2) and magnesium bicarbonate (Mg (HCO3) 2) were analyzed in boiling water, and carbon dioxide (CO2) was released, resulting in the precipitation of refractory calcium carbonate (CaCO3) and magnesium hydroxide (Mg (OH) 2). This is where limescale comes from.
Scale proof of its formation reasons and forming state differences can be roughly divided into hard scale and soft scale two. When the water contains impurities such as carbonate colloid, bacteria and organic matter, the carbonate is similar to the sand and stone in the cement sand slurry, while the colloid, bacteria and organic matter are equivalent to the cement in the cement sand slurry. When the viscous substances such as colloid, bacteria and organic matter in the water are used with the carbonate, the hard scale adhering to the container (or the outside of the pipe) is formed under the condition of high temperature boiling. Once colloids, bacteria, organic matter and other viscous substances are removed (such as by ultrafiltration), even though the concentration of calcium, magnesium ions and carbonate ions in the water is very high, only naturally white and loose carbonate soft scale, which is easy to remove, will not occur hard scale.
The harm of scale
The harm of scale mainly includes:
Scale has serious harm to the health of human body.
1, easy to cause gastrointestinal digestion and absorption effect of messy, as well as urinary system diseases, such as constipation, at the same time, if the scale is serious, it will lead to gastritis and a variety of stones such as kidney stones, urethral stones of serious disease rate. And tartar, periodontitis in a certain level also have a greater relationship with scale.
2. Secondly, when scale cementation occurs, a large number of heavy metal ions are often attached. If the container is used for brilliant drinking water, there is a risk that heavy metal ions will dissolve too much in drinking water.
At the same time, scale also has great influence and harm to people.
1. First of all, the thermal conductivity of scale is very poor, which will lead to the deterioration of heat transfer on the heating surface, thus wasting fuel or power. Scale is usually cemented on the outside of containers or pipes. Household water, if the kettle has been full of scale will affect the boiling power of about 30%, that is, more electricity, including electric water heater is the same. For example, if the cost of boiling water is 30 yuan per month, 10 yuan of it is the depletion caused by scale.
2. Secondly, if the scale is cemented in the inner wall of the water heater or boiler, it will greatly increase the risk of explosion or explosion of the water heater and boiler due to thermal expansion and contraction and uneven force.
How to remove scale
Scale has certain harm to human health, so how to remove scale?
Thermal expansion and cold shrinkage to remove scale:
Put the empty kettle on the stove to dry the water in the scale. When there is a crack in the bottom of the kettle or when there is a “bang” sound in the bottom of the kettle, take the kettle off and quickly inject cold water, or wrap the handle and spout with a rag, hold it with both hands, and quickly sit the dry kettle in the cold water (do not let the water into the kettle). Repeat for 2 to 3 times, the scale at the bottom of the pot will fall off due to thermal expansion and contraction.
Lime scale removal:
Put lemon slices into a kettle (the thinner the better, so that the citric acid can be released) and boil the water for about 5 minutes. Let the lemons soak in the water for 2 minutes to remove.
Vinegar scale removal:
If the kettle has scale, can put a few spoons of vinegar into the water, burn one or two hours, scale is removed. If the main factor in the scale is calcium sulfate, the soda ash solution can be poured in the kettle to boil, can remove the scale.
Mask anti-scaling:
Put a clean face mask in a kettle. When boiling water, scale will be absorbed by the mask.
Overall removal of water scale for the whole family:
Can install a water softener, the whole family of water to hold the whereabouts of scale, so that everyone saves the problem of scale and trouble. For drinking water scale removal, you can use the baby love water for infants special filter kettle with hydrogen ion resin clean water equipment.
Scale cleaner:
Supermarkets, tea shops have sales of limescale cleaners, the main factor is hydroxyalanic acid, the material is safe, non-toxic and environmental protection. This scale cleaner is easy to use and effective, with proper dosage and control instructions, suitable for home users.
Magnetization:
Put a magnet in the pot, not only does not accumulate scale, boiled water is magnetized, but also has the effect of preventing constipation, pharyngitis.
Ion AC scale removal method:
Accept specific cationic exchange resin, calcium and magnesium ions will be replaced by sodium ions in the water, because the ablation degree of sodium salt is very high, so as to prevent the natural situation caused by scale with the rise of temperature.
Membrane dispersion scale removal method:
Nanofiltration membranes (NF) and reverse osmosis membranes (RO) can block calcium and magnesium ions in water, thus basically reducing the hardness of water. The feature of the membrane scattering method is that the effect is remarkable and stable, and the application limits of the treated water are wide. However, it has higher requirements for water inlet pressure, equipment investment and operation cost.
How does electric kettle remove scale
The birth of electric kettle is to provide safe, healthy and fast drinking water for everyone. It has humanized design, elegant and fashionable shape, fast boiling speed and high cost performance, and has become one of the most commonly used small household appliances in today’s families. However, if electric kettle is used for a long time, scale will occur, and if it is not organized in real time, water quality will be affected.
Electric kettle boiling sweet potato descaling
In the new kettle, put more than half a kettle of yams, fill with water, the yams cooked, then boil water, will not accumulate scale. But we should pay attention to the kettle after boiling potatoes, the inner wall do not scrub, otherwise it will lose the descaling effect. For the old kettle full of scale, after boiling in the above way once or twice, not only the original scale will gradually fall off, and can play a role in preventing the reaccumulation of scale.
Baking soda to remove scale
The same ordinary electric kettle heating plate is made of aluminum, in the electric kettle boiling water, it is easy to form scale, usually we can put 1 spoon of baking soda, boiling for a few minutes, scale is removed. Or you can pour the concentration of 1% of the su hanging water about 500 grams, gently shake shabu, limescale can be removed.
Vinegar removes scale
The main factor of scale is calcium carbonate and other carbonates. The acetic acid in the vinegar will react with it, resulting in substances soluble in water, minerals and carbon dioxide gas. As usual, white vinegar can be bought in the supermarket. Old vinegar will do, but it won’t work as well as white vinegar.
Remove scale from potato skin
Aluminum POTS or pans will develop a thin layer of scale after being used for a while. The potato skin in the inside, add appropriate amount of water boiling, boiling about 10 minutes can be removed.
Boil eggs to remove scale
The same ordinary electric kettle, after a long time hard and difficult to remove the scale, such as using it to boil two eggs, will receive the ideal effect, the two egg shells slightly broken, put into a bottle, and then into half a pot of water, stir with a blender or spoon, and then boil, place for half an hour, pour out the eggshell, and then wash two times with water.
How to remove scale of hot water bottle
Here are some simple ways to remove scale from hot water bottles.
1. Use 250 grams of vinegar, heat it and pour it into the hot water bottle. Soak it for a few hours, and then shake it up and down and around, and the scale in the bottle will fall off.
2, can be poured into the concentration of 1% su hanging water about 500 grams, gently shake shabu, limescale can be removed.
3, take 200 grams of dilute hydrochloric acid put in the bottle after soaking for a while, and then shake can remove the scale in the bottle.
4, grab a handful of mung beans into the hot water bottle, put a little water, plug the mouth of the bottle, gently shake a few times, put the mung beans and water out, and then put some water to rinse.
5, put some paper scraps in the bottle, then pour into warm salt water, gently shake for a while, the scale can be removed.
6. Take a little tea, put it into a warm water bottle, fill it with boiling water, cover the cork, and drink the tea after 15 ~ 20 minutes. And the scale inside the bottle under the action of theophylline, will fall off and sink to the bottom of the bottle. Soak a few times in a row, the effect will be better.
7. Break two egg shells slightly, put them into a bottle, and then put half a cup of cold water into it. Plug the bottle and hold it with one hand, thumb and other fingers hold the neck of the bottle, and hold the bottom of the bottle with the other hand. For about 20 seconds, remove the cork, pour out the eggshell, and then wash it twice with water.
8. Pour the noodles into the bottle, shake it for a few minutes, and then rinse it with clean water.
9. Take some sunny leaves or pumpkin leaves cut into 3cm to 4cm square pieces, put them into the bottle, add a little cold water, gently shake the warm water bottle a few times, pour out and then wash with clean water.
