What are the characteristics of in situ vertical freeze dryer?

Freeze dryer is a technical method to prefreeze water-containing items, and then sublimate their moisture in a vacuum state to obtain dried items, the freeze-dried items are easy to be stored for a long time, and can be restored to the form before freeze-drying and maintain the original biochemical characteristics after adding water. For heat-sensitive substances such as antibiotics, vaccines, blood products, enzymes, hormones and other biological products, freeze-drying technology can show its superiority, and is suitable for lyophilization experiments and small-scale production of laboratory samples.

There are four types of freeze dryers: ordinary type, gland type, multi-manifold ordinary type, and multi-manifold gland type, with pre-freezing function.

Green and environmentally friendly in line with international standards;

The cold trap and operating surface are all stainless steel, which is corrosion-resistant and easy to clean.

LCD display, Chinese interface, display drying curve;

Transparent bell type drying chamber, safe and intuitive;

The cold trap has a large opening, no inner coil, and has a sample pre-freezing function;

Stainless steel sample holder, ordinary type sample tray spacing can be adjusted;

The imported compressor has a large cooling capacity and low noise;

Small size, easy to operate;

LCD display lyophilization curve, three-layer tray.

Freeze drying is a technical method to prefreeze water-containing items, and then hand over their moisture to sublimate in a vacuum state to obtain dry items. Freeze-dried items are easy to store for a long time, and can be restored to the state before freeze-drying and retain the original biochemical properties after adding water. For heat-sensitive substances such as antibiotics, vaccines, blood products, enzyme hormones and other biological products, freeze-drying technology can show its superiority.

Beijing Detianyou FD series freeze dryer adopts air-cooled condensing refrigeration system, stainless steel structure, transparent drying chamber, which is convenient for observing the whole process of freeze-drying.

The S series in the FD series has the function of programmable control of shelf heating, using PID adjustment, precise temperature control, and the man-machine interface adopts a large-screen LCD screen, which provides users with more information about the lyophilization process in the form of curves and data, and is equipped with a host computer communication interface.

At low temperatures, the water is drained so that its components are not destroyed.

Is it an air compressor, is it used on the pipeline?

It is used to condense water in the air, and the presence of water will affect the effect of painting.

Hello! There is no difference between the freezer and the refrigeration dryer (refrigeration dryer), the principle is the same, both can absorb moisture, but the former is relatively mild, the latter is stronger, and the main reason is that the circulating fan is relatively large.

Hope it helps, hopefully.

There are many drying methods, such as sun drying, drying, boiling drying, drying, spray drying, vacuum drying, freeze drying, etc. Among them, freeze-drying is the most ideal method for preserving living biological matter. The refrigeration dryer is one such machine that is used for drying and maintaining the activity of biomolecules, and is mostly used in the biopharmaceutical industry.

The freezer only has the function of freezing, and the concept is extensive, and the refrigerator and freezer should also be counted.

Nowadays, there are many dryers on the market, such as vacuum desiccants, dryers, freeze dryers, etc. These machines work in very different ways, but they all help people in their respective fields. Among them, in the field of medicine and biological research, the freeze dryer is a very important machine, which can help medical research well and play a key role in the manufacture of biological products and drugs.

a) Introduction of freeze dryer.

A freeze dryer is a machine that can solidify the moisture in the product and then sublimate the solid thing into a gaseous state. Through the internal refrigeration system, vacuum system and heating system, the moisture of the product is completely removed and the drying effect has been achieved.

2) The origin and development form of freeze dryer.

As early as the 19th and 20th century, refrigeration technology has developed to a certain extent, but in the following decades, refrigeration technology has experienced ups and downs and wandering, and has not been well developed. However, in the 21st century, this technology has developed greatly with its own unique advantages, and the freeze dryer has also had a good market. Gradually, it has developed well in the fields of medicine, biological research, blood products, active substances, etc., and the scale and field of freeze dryers are in a state of continuous expansion, and further development will be made in the dryer market.

3) Advantages of freeze dryers.

In the process of working, the freeze dryer can well remove the moisture inside the article, and at the same time, it will not affect the volume, texture and composition of the object. It can effectively avoid changing the composition of the object during the drying process, and reduce oxidation, denaturation, inactivation, etc. Moreover, the freeze dryer can effectively inhibit the growth of microorganisms and avoid hardening.

4) Deficiencies of freeze dryers.

Although the freeze dryer has many advantages, the cost of a freeze dryer is very high, and its initial investment cost and later maintenance and operation costs are a large expense.

When starting the dryer, it is best to pre-cool the dryer for 30 minutes before drying the items. When the machine is stopped, the temperature and air pressure of the machine should be recorded to a certain extent, and remember to wipe the water on the inner wall and cover it with a large filter paper to prevent dust.

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The freeze dryer is a kind of drying equipment, which is mainly composed of refrigeration system, vacuum system, heating system, and electrical instrument control system. At present, with the continuous development of freeze-drying technology and freeze-dryer technology, freeze-drying is more and more widely used in the development of sterile preparations, especially in the pharmaceutical industry, which plays a very important role. So let's talk about the use, benefits and safety precautions of the freeze dryer.

The freeze dryer in the food industry is often used for drying fruits and vegetables, meat and poultry, aquatic products, condiments, convenience foods and famous and high-quality products, so the freeze dryer is also known as the food freeze dryer, which keeps the original color, aroma, taste, shape and freshness of the food unchanged, and has good rehydration, the finished product is easy to store and transport, the cost is reduced, and the shelf life is extended.

In the medicinal material industry, the vacuum freeze-drying process is used to dry nutritional and health products such as royal jelly, ginseng, turtle, turtle, earthworm, etc., which better retains the original nutritional value and makes people believe that the nutrition products are pure and natural.

The pharmaceutical industry is used for the dehydration and preservation of serum, plasma, vaccines, enzymes, antibiotics, hormones and other Chinese and Western medicines.

Biological research uses vacuum freeze-drying technology to preserve blood, bacteria, arteries, bones, corneas, nervous tissues and various organs for a long time, which can be regenerated by only providing water when used, and still maintain their biophysical properties.

Benefits of freeze dryers:

1. Freeze-drying is carried out at low temperatures, so it is particularly suitable for many heat-sensitive substances. For example, proteins, microorganisms, etc. will not be denatured or lose their biological vitality. Therefore, freeze dryers are widely used in medicine.

2. Due to drying in the frozen state, the volume is almost unchanged, and the original structure is maintained, and no concentration occurs.

3. The substance dried by the freeze dryer is loose and porous, sponge-like, and dissolves quickly and completely after adding water, and almost immediately returns to its original properties.

4. Because the freeze dryer dries under vacuum, there is very little oxygen, so some substances that are easy to oxidize are protected.

5. When the freeze dryer is dried at low temperature, the loss of some volatile components in the substance is very small, which is suitable for drying some chemical products, drugs and food.

6. In the freeze-drying process, the growth of microorganisms and the action of enzymes cannot be carried out, so the original properties can be maintained. 7. Freeze dryer drying can remove more than 95-99% of the water, so that the dried products can be stored for a long time without deterioration.

8. Because the water in the material exists in the form of ice crystals after pre-freezing, the inorganic salt dissolved substances that were originally dissolved in water are evenly distributed in the material;

9. The substance dried by the freeze dryer is loose and porous, spongy, and dissolves quickly and completely after adding water, and almost immediately returns to its original properties;

10. Because the drying is carried out under vacuum, there is very little oxygen, so some substances that are easy to oxidize are protected from drying.

1.Pre-freeze drying is carried out in situ, which reduces the cumbersome operation of the drying process and realizes the automation of the freeze-drying process;

2.Silicone oil is used as a circulating medium, with high temperature control accuracy, a temperature difference of 1 on the shelf, and a uniform drying effect;

3.The temperature of the shelf can be adjusted, controllable, explored, pilot test and production process;

4.32 programs can be stored, each program can be set up with 36 sections, the freeze dryer can modify the program parameters during operation, and record the drying curve;

5.Touch screen operation, PID control, display drying curve;

6.The square tray is not easy to deform, easy to operate, and easy to clean;

7.Equipped with an inflatable valve, it can be filled with dry inert gas;

8.The drying chamber adopts a high light transmittance colorless transparent plexiglass door, which can clearly observe the change process of materials during operation;

9.Optionally available with eutectic point test device.

Freeze drying technology has a wide range of applications in the fields of bioengineering, pharmaceutical industry, food industry, material science and deep processing of agricultural and sideline products.

1. In the freeze-drying process, the growth of microorganisms and the action of enzymes cannot be carried out, and the original shape can be maintained. Drying in a frozen state preserves the original structure and does not concentrate.

2. Because the drying is carried out under vacuum, there is very little oxygen, so some substances that are easy to oxidize have been protected by the brigade.

3. Drying can remove more than 95% of the water, so that the dried product can be stored for a long time without deterioration.

4. The dried substance is loose and porous, dissolves quickly after adding water, and can immediately restore its original shape.

5. Freeze-drying is carried out at low temperature, which is especially suitable for many heat-sensitive substances. For example, proteins, microorganisms, etc. will not be denatured or lose their biological vitality. Therefore, it has to be widely used in medicine.

6. Drying at low temperature, the loss of some volatile components in the substance is very small, which is suitable for drying some chemical products, drugs and food.

1. From physics, it can be seen that water has three phases, O point is the three-phase common point, and O is the melting point of ice. According to the principle of decreasing pressure and decreasing boiling point, as long as the pressure is under the pressure of the three-phase point, the moisture in the material can be directly sublimated from water to water vapor without passing through the liquid phase.

2. According to this principle, the wet raw materials of the food can be frozen below the freezing point first, so that the moisture in the raw materials can be turned into solid ice, and then the ice can be directly converted into steam and removed in the appropriate vacuum environment, and then the water vapor condenser in the vacuum system will be used to condense the water vapor, so that the materials can be dried. This method of obtaining drying by vacuum freezing is the process of change and movement of water, which occurs at low temperature and low pressure, therefore, the basic principle of freeze drying is the mechanism of heat and mass transfer at low temperature and low pressure.