What is the principle of desiccant physical adsorption?

Desiccant refers to substances that can remove water from moist substances, such as calcium sulfate and calcium chloride, etc., and are dried by combining with water to form hydrates; Physical desiccants, such as silica gel and activated alumina, are dried by physical adsorption of water. In the case of food, under the right temperature and humidity, bacteria and moulds in food can multiply at an alarming rate, causing food to spoil, causing moisture and discoloration. Electronics can also cause metal oxidation due to high humidity, resulting in defects.

The purpose of using desiccant is to avoid the occurrence of defective products caused by excess moisture.

Principle. Physical adsorption.

Desiccant is suitable for preventing instruments, meters, electrical equipment, medicines, food, textiles and other packaging items from moisture, desiccant is also widely used in shipping, because goods are often damp and deteriorated due to high temperature during transportation, desiccant can effectively dehumidify and prevent moisture, so that the quality of goods can be guaranteed.

1. Desiccant is used for moisture-proof of bottled drugs and food. Ensure the dryness of the contents and prevent the growth of various miscellaneous molds.

2. The desiccant can be used as a general packaging desiccant for moisture-proofing.

3. The desiccant can be conveniently placed in the packaging of various items (such as instruments, electronic products, leather, shoes, clothing, food, medicine and household appliances, etc.) to prevent the items from being damp, mildewed or corroded.

Desiccant, also called absorbent, is used in moisture-proof, mildew-proof, damp play, desiccant silica gel, alumina gel, molecular sieve, activated carbon, bone charcoal, charcoal, mineral desiccant, or activated clay, etc., its wet principle is to conduct water molecules in its own structure through physical means. We have been ordering the desiccant produced by Shenzhen Ganba desiccant ****, and the quality is very good!

Desiccant. The principle is to use the water absorption of certain substances to absorb the moisture in the packaging environment into its own structure, so as to reduce the air humidity in the packaging environment.

1. Why does desiccant turn into water?

1.Because of the dehumidifier.

The water itself is put into it by strong pressure, and when the temperature is high, it vaporizes, which is called turning into water.

2.Any chemical that absorbs moisture from the air is also called a desiccant. According to the state of the hygroscopic agent, it can be divided into three categories: solid hygroscopic agent, liquid hygroscopic agent and gas hygroscopic agent, among which the more mentioned are solid hygroscopic agent and liquid hygroscopic agent.

3.According to the state of the moisture absorber, it can be divided into three categories: solid moisture absorbers, liquid moisture absorbers, and gas moisture absorbers.

4.dehumidification of moist air; Absorbs liquids to dehumidify the air; In order to compress the air, this air is mixed with moist air to achieve the purpose of diluting and dehumidifying the moist air.

2. Can the desiccant be reused?

1. It can not be reused, the role of desiccant is to absorb water, different types of desiccant can absorb water is fixed, absorb a certain amount of water when used, and it will not absorb water when saturated.

2.If you use silica gel desiccant, you can reuse it. After absorbing water, it is put in a drying oven and baked for a period of time, and then it can be taken out and continued to be used.

Silicone can be reused, white transparent particles, which are non-toxic and odorless, and can be reused after exposure. The theory is that it is baked in the oven, but using the oven will burn the outer packaging.

3.Desiccants have an expiration date.

, about a year or two earlier than the shelf life of opened food and medicine. However, once it comes into contact with the outside air of opening, it will continue to absorb moisture, and the service life will be up to one or two months. If you stay in a very humid environment for a long time, after absorbing a lot of water, you will put it in the camera and jewelry box for second use, which may backfire and damage valuables.

The desiccant can be reused.

It can be seen that the principle of desiccant is to remove water molecules from wet substances by adsorption.

That is, the particles on the surface of the solid substance are adsorbed on the surface of the solid substance by attracting water molecules in various gases and liquids.

Desiccant is also called absorbent, is used in moisture-proof, mildew-proof, play a role in rotten drying, desiccant silica gel, oxygen dispersion rapid aluminum gel, molecular sieve, activated carbon, bone charcoal, charcoal, Chongmeng this mineral desiccant, or activated clay, etc., its drying principle is to adsorb water molecules in its own structure by physical means.

The principle is to rely on adsorption to remove water molecules in moist substances, that is, through the solid surface of the dust residue particles and various gases and liquids to attract each other and adsorb them on the surface of solid substances.

The principle of desiccant is to absorb water, and the magic is remarkable: it can repair the mobile phone that has entered the water; Prevent ** yellowing and aging; Put it in the wardrobe to prevent mildew and odor! Give me a thumbs up! Thanks! If there's anything else to leak, ask me and I'll answer it for you!

Desiccant is a hygroscopic agent whose principle is that it adsorbs or absorbs moisture from the surrounding environment to keep it dry. They are commonly used in areas such as moisture protection, freshness, moisture reduction, and corrosion prevention. Here's how desiccant works:

1.Adsorption: Many desiccant, such as silica gel, activated carbon, zeolite, etc., have a large number of tiny pore structures.

These pores are able to adsorb and store water molecules. When the humidity in the environment is high, moisture molecules enter the pores of the desiccant, keeping the surrounding environment dry.

2.Absorption: Certain desiccants, such as calcium chloride and calcium sulfate, are chemically absorbent. They react with moisture and form hydrates or hydrated ions, which absorb moisture from the environment and keep it dry.

3.Chemical reactions: Some desiccant, such as iron oxide and cobalt oxide, use chemical reactions to adsorb and fix water. The chemical components in them react with moisture to form compounds, which thus keep the environment dry.

Desiccants have a wide range of applications in industry and daily life. They can be used to package food, pharmaceuticals, electronics, and cosmetics to keep them dry and stable. When storing and transporting goods, desiccant prevents corrosion and damage caused by humidity.

In addition, in high humidity environments, desiccant can also be used to reduce the humidity in the air to provide a more comfortable environment.

It is important to note that the moisture absorption capacity of desiccant is limited by celery, and once saturation is reached, they need to be replaced or reborn to continue to work. When using desiccant, the appropriate type and dosage should be selected according to different situations and needs, and relevant safety and use guidelines should be followed. <>

The adsorption dryer is a kind of equipment used to process moisture and locust rolls. Its basic working principle is to dry the air by using a desiccant to absorb moisture from the air. A desiccant is usually a material that highly adsorbs moisture, such as silica gel, alumina or molecular sieves.

A dryer usually consists of two main parts: a drying zone and a regeneration zone. In the drying zone, moist air passes through the desiccant layer and moisture is absorbed by the adsorbent and reduces the humidity of the air.

During this process, the desiccant is gradually saturated and another process is required to bring it back into an adsorbed state.

In the regeneration zone, the adsorbent expels the absorbed water by heating and/or reducing pressure, leaving the desiccant in an adsorption state again. This process is also known as the regeneration process.

There are many advantages to using an adsorption dryer. First, they are able to work effectively in environments with high relative humidity, while also being able to cope with changes in atmospheric pressure. Second, adsorption dryers control moisture content more precisely than other drying methods, which makes them particularly useful in applications where ultra-fine powders and high-precision products are manufactured.

Finally, adsorption dryers do not require any ozone or other harmful chemicals, making them more efficient than some drying methods.

In short, adsorption dryers are widely used in industrial, medical and food industries due to their high efficiency and environmental protection.

1. The adsorption dryer is passed"Pressure changes"(pressure swing adsorption principle) to achieve the drying effect.

2. Since the ability of the air to contain water vapor is inversely proportional to the pressure, a part of the air (called regenerated gas) after drying is depressurized and expanded to atmospheric pressure, this pressure change makes the expanded air drier, and then let it flow through the desiccant layer that needs to be regenerated without connecting the air flow (that is, the drying tower that has absorbed enough water vapor), and the dry regeneration gas sucks out the water in the desiccant and takes it out of the dryer to achieve the purpose of dehumidification.

Taiwan DPC introduces to you: the regenerative adsorption dryer is composed of two double online machines, and the barrel is filled with desiccant (the surface of the desiccant can absorb water). The two barrels take turns to turn on and off the air flow, alternating between drying and regeneration operation, so that the air flow can continue to contact the dry desiccant to achieve the purpose of dehumidification and drying.

Drying principle of heatless regeneration adsorption dryer:

The heatless regeneration adsorption dryer achieves the drying effect by changing the pressure. Since the ability of the air to hold water vapor is inversely proportional to the pressure, a part of the dry air (called regenerated gas) after drying is depressurized and expanded to atmospheric pressure, this pressure change makes the expanded air drier, and then let it flow through the desiccant layer that needs to be regenerated without connecting the air flow (that is, the drying tower that has absorbed enough water vapor), and the dry regenerated air absorbs the water in the desiccant and takes it out of the dryer to achieve the purpose of dehumidification and drying.

The heatless regeneration adsorption dryer generally consumes about 15% of the regenerated compressed air, while the Betten mold core dryer: the regeneration air consumption of the microthermal model is 3%, and the regeneration air consumption of the heatless model is 6%.

There is the drying principle of the thermal regeneration adsorption dryer:

The thermal regeneration adsorption dryer achieves the drying effect by temperature change. Because the ability of air to hold water vapor is directly proportional to temperature.

In an internally heated adsorption dryer, a small amount of dry air (called regenerated gas) flows through the desiccant layer to be regenerated and a heater built into the barrel is activated, and the high-temperature air generated draws out the moisture from the desiccant and takes it out of the dryer.

An externally heated adsorption dryer is to let a small amount of dry air (called regenerated gas) flow through an external heater and then blow through the desiccant layer to be regenerated, and the high-temperature dry air generated will suck out the moisture in the desiccant and take it out of the dryer.

The other type of externally heated adsorption dryer is to blow ordinary air through the heater placed on the barrel through the blower, and the high-temperature air generated can suck out the moisture in the desiccant and take it out of the dryer. This externally heated adsorption dryer does not require compressed air. That is, the regenerated gas consumption is 0.

Dehaha air engineers will answer for you, the adsorption principle of the adsorption dryer is as follows:

Clause. 1. Bucking: The adsorption bed is adsorbed at a higher pressure, and then lowered to a lower pressure, usually close to atmospheric pressure, at which time a part of the adsorption group is decomposed and sucked out. This method is simple to operate, the desorption of single adsorption components is insufficient, and the degree of adsorbent regeneration is not high.

Clause. 2. Vacuuming: After the adsorption bed is lowered to atmospheric pressure, in order to further reduce the partial pressure of the adsorption component, the method of vacuum can be used to reduce the pressure of the adsorption bed to obtain a better regeneration effect, but this method increases the power consumption.

Third, flushing: the weak adsorption component or other appropriate gas is used to pass through the adsorption bed to be regenerated, and the partial pressure of the adsorbed component decreases with the passage of the flushing gas. The degree of regeneration of the adsorbent depends on the amount and purity of the flush gas.

Clause. 4. Replacement: Use a gas with strong adsorption capacity to replace the originally adsorbed components from the adsorbent. This method is often used when the adsorption capacity of the product components is strong and the impurity components are weak, that is, the product is obtained from the adsorption phase.

Refrigerated dryers (refrigerateddryers) is a compressed gas water removal and purification equipment made of the principle of refrigeration, compressed gas containing a large amount of saturated water vapor from the upstream of the pipeline network after cooling treatment, most of the water vapor condensed into liquid water droplets, after the separation of gas and water is removed, the obtained dry compressed gas can meet the needs of most of the industry Unlike adsorption dryers, refrigerated dryers can remove part of the oil mist in the compressed gas by the way in the process of water removal. Its pre-treatment requirements for compressed gas are not as stringent as those of adsorption dryers.

Adsorption dryers are more suitable for the food industry.

The pore size of the adsorbent is the same as the diameter of the water molecules, which pass through the surface of the adsorbent and are adsorbed. Decompression and regeneration, water molecules are separated.

The adsorption dryer is through"Pressure changes"(pressure swing adsorption principle) to achieve the drying effect. Since the ability of the air to contain water vapor is inversely proportional to the pressure, a part of the air (called regenerated gas) after drying expands to atmospheric pressure under decompression, this pressure change makes the expanded air drier, and then let it flow through the desiccant layer that needs to be regenerated without connecting the air flow (that is, the drying tower that has absorbed enough water vapor), and the dry regenerated gas sucks out the water in the desiccant and takes it out of the dryer to achieve the purpose of dehumidification. The two towers work in circulation, without the need for heat sources, and continuously provide dry compressed air to the user's air system.