Does limescale have anything to do with the pot?

Since the day when water was used as a heat exchange working fluid in boiler operation, the fouling of the heating surface and the heat transfer surface has become one of the main problems in the heat exchange process. For more than 200 years, people have fully studied the scale and the causes of scale formation in boilers, and launched various anti-scale technologies, but they have not been completely solved.

The layer of buildup deposited on the surface of the heating surface and the surface of the heat transfer surface can be called scale. The main causes of limescale are:

1. After the impurities of the boiler feed water enter the boiler, after continuous evaporation and concentration, the concentration of salts in the boiler feed water will continue to increase and reach the degree of saturation or supersaturation, and the precipitate will be precipitated on the metal surface of the boiler.

2. With the increase of water temperature in the boiler, the solubility of certain salts.

Inversely proportional to temperature, the solubility of these salts drops dramatically when the temperature rises, forming scaling.

3. Different salts interact or decompose by heat to form compounds that are difficult to dissolve.

The formation of limescale has nothing to do with the pot, and the cause of limescale is the problem of water quality.

The generation of limescale has nothing to do with the pot and has nothing to do with the water source. The water used in daily life has a certain hardness, and when the water with high hardness is heated, the insoluble salts of calcium ions and magnesium ions, such as calcium carbonate and magnesium carbonate, will be precipitated from the water and adhere to the inner surface of the kettle to form scale.

Hello, this is also related. If you boil water for a long time, this scale will be formed in the pot.

If you are satisfied, you are welcome, thank you.

Of course, the formation of limescale has nothing to do with the pot.

The production of limescale has a great relationship with water quality, and the minerals in drinking water are very heavy.

Scale is mainly formed by the precipitation of salts such as calcium and magnesium contained in boiler feed water after being heated and sticking to the metal surface. The thermal conductivity of scale is very small, about 2 5% of ordinary steel, and the scale is formed on the heating surface of the boiler, which will greatly deteriorate the heat transfer effect and affect the efficiency of the boiler; It is easy to burn out the metal material due to local overheating.

The main harm to the human body is that if people accidentally drink limescale fragments, they will enter the stomach and react with hydrochloric acid, which will release calcium and magnesium ions and carbon dioxide. Calcium and magnesium ions are necessary for the formation of stones; Carbon dioxide can make people bloated and uncomfortable; Patients with gastric ulcers may also be at risk of gastric perforation.

The water is constantly heated and evaporated and concentrated, resulting in an increase in the concentration of calcium and magnesium salts in the water, and when their concentrations are exceeded, they precipitate out of the water to form a precipitate.

At high temperatures, the carbonate in the water will combine with calcium and magnesium ions to generate insoluble calcium carbonate, magnesium carbonate, etc., and calcium carbonate, magnesium carbonate and other substances are precipitated from the water and adhered to the container, which becomes scale.

Scale, also known as "water rust" and "water alkali", is a white lump or powder substance that is gradually formed by the mineral contained in hard water after boiling in the container.

The main components of scale are calcium carbonate, magnesium hydroxide, magnesium carbonate, calcium sulfate, magnesium sulfate, calcium chloride, magnesium chloride, etc., and the thermal conductivity is very poor.

The scale is formed on the heating surface of the boiler, which will greatly deteriorate the heat transfer effect, and it is easy to burn out the metal materials due to local overheating, and even burst pipe accidents.

At high temperature, calcium sulfate containing slightly soluble in water will precipitate due to the evaporation of water, and the carbonate in the water will combine with calcium and magnesium ions to form calcium carbonate and magnesium carbonate that are insoluble in water, that is, water alkali. With the continuous evaporation and concentration of water, the water alkali content continues to increase, and scale is formed after reaching saturation.

1) According to the classification of chemical composition, it can be divided into carbonate scale, sulfate scale, silicate scale and mixed scale. The main components of carbonate scale are calcium carbonate and magnesium carbonate; The main components of sulfate scale and silicate scale are calcium sulfate and silicate compounds, respectively; Mixed scale is mostly a mixture of the above three types of scale.

2) According to the classification of physical properties, there are two kinds of scale, which are firmly bonded to the wall of the pot and pipe, and sediment, which is loose and easy to fall off.

There are several main ways to remove scale:

1) Lemon limescale remover. Put the lemon slices in a kettle (the thinner the better, the purpose is to release the citric acid as much as possible), boil the water for about 5 minutes, and let the lemon soak in the water for 2 minutes after boiling.

2) Vinegar to remove limescale. If the kettle has scale, you can put a few spoonfuls of vinegar into the water and boil for an hour or two to remove the scale. If the main ingredient in the scale is calcium sulfate, the soda ash solution can be poured into the kettle and boiled to remove the scale.

3) Ion exchange scale removal method. By using a specific cation exchange resin to replace calcium and magnesium ions in the water with sodium ions, the solubility of sodium salts is high, so the formation of limescale due to the increase in temperature is avoided.

4) Membrane separation and scale removal. Both nanofiltration membranes (NF) and reverse osmosis membranes (RO) can intercept calcium and magnesium ions in water, thereby fundamentally reducing the hardness of water. The characteristics of the membrane separation and scale removal method are that the effect is obvious and stable, and the treated water has a wide range of applications; However, there are high requirements for inlet pressure, and equipment investment and operating costs are high.

5) Limescale cleaner removes limescale. The main ingredient of limescale cleaner is hydroxymalonic acid, which is safe, non-toxic and environmentally friendly. This limescale cleaner is easy to use and effective, with the right dosage and detailed instructions, making it suitable for home use.

This netizen: The pot you often boil water in has scale, which is the scale containing calcium carbonate and magnesium carbonate in the water that has been deposited for a long time. If it is not removed, it will be insulated, which will make it difficult to boil the water, which is a waste of energy.

At the same time, if you drink limescale water for a long time, you are prone to kidney stone disease. It's best to wash off these limescale from the pot often as described below! Here's what I'll give you:

1. White vinegar descaling method: pour white vinegar and water into the pot at a ratio of 1:2, (250 ml of white vinegar is enough, that is, half a bottle of white vinegar bought from the supermarket is enough for one use.)

Soak for more than 2 hours. Later, wipe with a clean white cloth and pour out the vinegar again. After washing it with clean water several times, it is completely clean.

2. Lye descaling method: if the main component of scale is calcium sulfate, then pour the soda ash solution into it and leave it for two hours, and the scale can be removed. Then, wash the pot with clean water several times.

3. Soda descaling method: fill the pot with hot water, put in a little baking soda, shake repeatedly, and after a few minutes, the scale will automatically fall off. Clean the pot with clean water several times and it will be completely clean.

4. Boiled egg shell descaling method: boil the egg shell twice in a pot. Then, shake it repeatedly, pour it out, and then clean the pot with clean water to remove the scale.

Soak it in a small amount of vinegar and boiling water for 10-20 minutes and wipe it with a cloth I've tried it and it worked.

You can add a little vinegar to scrub.

The scale on the stainless steel is easy to wash and soak in vinegar overnight.

It is better if there is dilute hydrochloric acid.

An old loofah, after it is completely dry, remove the shell and seeds, take the inner capsule, wash it, and put it in when boiling water.

A mixture of compounds and impurities that precipitate from water when it is heated.

Water containing minerals such as calcium (Ca), magnesium (mg), and salts is called "hard water". Rivers, lakes, wells, and springs are all hard water. Tap water is obtained after river water, lake water or well water is settled, sediment is removed, and disinfection and sterilization are obtained, which is also hard water.

When it rains or snows just fall, the water does not contain minerals, so it is "soft water". After the water is boiled, a part of the water evaporates, and calcium sulfate (caso4, gypsum is calcium sulfate containing crystal water) that is not easy to dissolve precipitates. The original dissolved calcium bicarbonate (Ca(HCO3)2) and magnesium bicarbonate (mg(HCO3)2) are decomposed in boiling water, releasing carbon dioxide (CO2), which becomes insoluble calcium carbonate (CaCO3) and magnesium hydroxide (mg(OH)2), and sometimes MGC3 is also formed.

This results in the formation of limescale.

Generally, the metal cations contained in water are mostly calcium, magnesium, manganese, potassium, if its concentration is more than 100ppm (ppm is mg kg), it becomes hard water, if it is less than 50ppm, it becomes soft water, when these metal cations in the water are combined, in the heating process of water, due to evaporation and concentration, the white precipitate formed on the surface is scale.

Precipitation of calcium and magnesium ions in water. Over time, it will be formed, and there are carbonate ions in the water.

It is toxic, and the source of its "poison" lies in "thousands of boiling water", "scale", "nitrite production" and so on.

Scale affects human health. Tartar and periodontitis are often caused by scale; It can kill people. To this day, there is no vaccine to prevent the Legionnaires' disease, which hides in limescale, and 2,000 to 3,000 people die every year in France.

How to remove limescale:1. Break the egg skin, pour it into the kettle with the egg whites, and shake vigorously to remove limescale from the kettle.

2。Pour some white vinegar into the kettle, no white vinegar can be used with other vinegar, put it on the fire to boil, shake the kettle to make the vinegar fully contact to dissolve the scale. This method is more time-consuming, but it is more effective.

3。If the kettle at home has a thick layer of limescale, you can pour out the water from the kettle completely and dry boil it over the fire. When the kettle is very hot, quickly pour a lot of cold water into the kettle, then the large limescale in the kettle will fall off, and the remaining thin limescale will be removed with white vinegar.

4。When boiling water in an aluminum kettle with limescale, put 1 teaspoon of baking soda and boil for a few minutes to remove the limescale.

There is a risk of causing cancer.

It is easy to cause gastrointestinal digestion and absorption disorders and constipation, which increases the incidence of gastritis and various stones. Tartar and periodontitis are often caused by scale;

And scale is insoluble in water is only relative, after the water is heated, some of the precipitation will be dissolved, which will form the precipitated heavy metal ions into the water again, so that the content of heavy metal ions in the water exceeds the requirements of health standards, endangering human health, such as calcium carbonate, magnesium carbonate in the human body a large number of deposits are easy to form stones.

If you want to remove it, it depends on what kind of scale it is

I seem to have heard that it may cause cancer.

The thick scale will affect the heat conduction, and boiling water is just a waste of energy.

Drinking too much of this water is easy to get stones