What do I need to pay attention to in the operation of vacuum dryer

Vacuum dryer has fast drying speed, high efficiency, and will not cause damage to the nutrients of the product. It is mainly designed for drying heat-sensitive, easily decomposed and easily oxidized substances, and it can also be filled with inert gas to the interior, especially some materials with complex composition can also be dried quickly. At present, this equipment has been widely used in the dehydration and drying of fruits and vegetables, foodstuffs, health care products, pharmaceuticals, etc. Its good drying quality is more and more favored by users. As introduced by a technician, the vacuum dryer mainly uses vacuum drying technology and realizes constant feeding and discharging under vacuum. As the oxygen content is low when drying under low pressure, it can prevent the dried materials from oxidation and deterioration.

At the same time, it can also vaporize the moisture in the material at low temperature, which is especially suitable for drying heat-sensitive materials. It is worth mentioning that vacuum drying with recovery device is convenient to collect the important ingredients in the material, but also to recover the pollutants, which is an environmentally friendly type of "green" drying.

Along with the rapid development of food industry and the national emphasis on energy saving and environmental protection of food equipment, coupled with the upgrading of consumption, people's demand for healthy, nutritious and safe food is increasing, which provides a good opportunity for the development of vacuum dryer. Admittedly, although the vacuum drying equipment plays an important role in the food drying process with its own many advantages. However, users need to pay attention to some problems in operating and using vacuum dryer.


Vacuum extraction

Users need to evacuate the vacuum before use, and then heat up the temperature to operate the equipment. According to the industry personnel. If first heating up and then evacuating, this may cause the vacuum pump efficiency to drop. Because when the heated air is pumped away by the vacuum pump, the heat will inevitably be brought to the vacuum pump, which will lead to high temperature rise of the vacuum pump. In addition, because the vacuum dryer is working under vacuum sealing state, if it is heated first, the gas rises hot and generates huge pressure there is a potential danger of bursting.

Explosion-proof and corrosion-proof

It is understood that the vacuum dryer should be used in an environment where the relative humidity is ≤ 85% RH and no corrosive vacuum dryer performance gases, etc. exist around. Note that, because the studio of the vacuum double cone rotary vacuum dryer is not specifically explosion-proof, anti-corrosion and other treatment, therefore, in order to protect the safety of the operation and use of equipment, but also to extend the service life of the equipment, the user should not put easy to natural, explosive, easy to produce corrosive gas materials, so as to avoid the normal work of the subsequent equipment.

Do not work for a long time

Generally speaking, the vacuum pump can not work for a long time, so when the vacuum degree reaches the requirements of the vacuum dryer drying materials, it is best to close the vacuum valve first, and then turn off the power of the vacuum pump, and when the vacuum degree is less than the material requirements of the vacuum drying equipment, then open the vacuum valve and the power of the vacuum pump, and continue to pump vacuum, which is conducive to extending the service life of the vacuum pump, and to a certain extent, saving the user the investment cost of replacing the vacuum pump or vacuum This is conducive to prolonging the service life of vacuum pump and saving the input cost of replacing vacuum pump or vacuum dryer to some extent.

Sampling needs to open the vacuum valve

Generally speaking, the vacuum dryer needs to take samples during operation to check the drying situation of materials or analyze the materials so that the subsequent process can be carried out better. When sampling, you need to turn off the vacuum pump, open the start vacuum pipeline valve, and then open the venting valve on the vacuum system, let the equipment pass into the gas, and first suspend the work of the host. In the middle of the process, the sample can be taken according to the processing needs. After sampling, the equipment can be turned on again.

Compared with the traditional dryer, as a drying equipment, vacuum dryer has obvious advantages and has a broad market prospect. The vacuum dryer not only improves the drying efficiency of materials and ensures the drying quality, but also has the characteristics of green and environmental protection, which meets the green requirements advocated by the state. However, users still need to pay attention to some problems in the operation to ensure the safety of using vacuum dryer.

Post time: Jun-06-2022