Zhejiang Oulun Electric Co., Ltd

Add: No.17 Tangmei Road, Yuhang Economic Development Zone, Yuhang District, Hangzhou, Zhejiang, China

Contact us: Lily Shen

Tel: 86-571-89301300

Mobile: 86-15957119041

Email: sales8@oulungroup.com

Home > News > Content
20 Pint Dehumidifier Dryer Basic Knowledge
May 06, 2018

20 pint dehumidifier dryer basic knowledge compression air drying method compressed air can be compressed by pressure, cooling, adsorption and other methods to remove the water vapor, can be heated, filtration, mechanical separation and other methods to remove liquid water, in the pneumatic technology, the main drying method of the main freezing and adsorption of two methods. 1. The refrigerated dryer is a kind of equipment which is relatively dry and compressed air by cooling the compressed air by artificial refrigeration. 2, the principle of the adsorption dryer is to use some adsorbents (such as alumina, molecular sieve, silica gel, etc.) to adsorb water in the compressed air to reduce the dew point temperature of compressed air, so as to achieve high quality compressed air. The refrigeration dryer system 1, flow chart 2, working principle, the moist and high temperature compressed air flow into the pre cooler (high temperature type special) heat exchanger and the heat exchanger and the cold air discharged from the evaporator, so that the temperature of the compressed air entering the evaporator is reduced. The compressed air after the heat exchange flows into the evaporator through the heat exchange function of the evaporator and the heat exchange of the refrigerant. The heat in the compressed air is taken away by the refrigerant, the compressed air is cooled quickly, the moisture in the moist air reaches the saturation temperature and condenses rapidly. The water after condensation is formed into water after condensing, and the unique gas water separator is high. The water is separated from the air by centrifugal force and the water is discharged from the automatic drain valve. The air pressure dew point after cooling can reach 2 degrees Celsius. The cooling air after cooling flows through the air heat exchange with the high temperature moisture and hot air inlet of the entrance. The heat exchange cold air increases the temperature by absorbing the heat of the inlet air, while the compressed air is also reheated by the two condensers of the refrigeration system (unique design of the peer) and the high temperature refrigerants. The temperature is fully heated to ensure that the outlet air pipes do not dew. At the same time, the cold source of the outlet air is fully utilized to ensure the condensation effect of the freezing system and ensure the quality of the air at the outlet of the machine. 3. Most of the main parts of the freezing dryer and the refrigeration compressor used by the compressor cold drying machine are mostly used in the middle and high temperature type full seal reciprocating compressor, which are characterized by compact structure, small volume, light weight, low vibration, low noise and high energy efficiency. As the main body of the motor and compressor in the fully sealed compressor is sealed in a steel shell, the motor is in the cold medium gas environment, and the cooling condition is better and the life is longer. There is a specified number of lube oil in the lower part of the shell. When the compressor works, it will automatically supply fuel to all parts, and do not need to add lubricating oil at ordinary times. The semi - sealed reciprocating machine or screw compressor is also selected in the large cold drying machine, which are characterized by high cooling power and adjustable load to meet different needs. The main function of the heat exchange and evaporator heat exchange in the cold dryer is to use the cold amount of the compressed air cooled by the evaporator (for the vast majority of the users this part of the cold amount is cold) and to cool the compressed air with a large amount of water vapor with this cold measure, thus reducing the cold drying mechanism. The heat load of the cold system can save energy. On the other hand, the temperature of the low temperature compressed air rises in the heat exchanger, so that the outer wall of the exhaust pipe will not appear condensation due to the low temperature. The evaporator is the main heat exchange component of the drying machine. The compressed air is forced to cool in the evaporator. Most of the water vapor is cooled and condenses into the liquid water discharge machine, which makes the compressed air dry. In the evaporator, the convection heat and mass exchange between the air and the cold medium low pressure vapour is carried out. Through the low pressure liquid after the throttling device, the phase change in the evaporator becomes the low pressure cooling medium steam, and the heat is absorbed in the phase transition process, thus the compressed air is cooled. In order to achieve the highest possible heat transfer effect, it is necessary to increase the heat transfer coefficient, that is, the heat exchange area of the heat exchanger, so the outer wall of the cold dry evaporator and the copper tube of the heat exchanger has adopted the measures of the aluminum fins. At the same time, the fins on the copper tube of the heat exchanger can reduce the impact of the air on the copper tube and avoid the rupture of the copper tube. (3) the condenser and the two condenser (pre cooling regenerator) in the cold dryer, the function of the condenser is to cool the high pressure and superheated refrigerant steam from the refrigerant compressor to the liquid refrigerant and make the refrigeration process continuous. The heat discharged from the condenser includes the heat absorbed by the refrigerant from the evaporator and the heat transferred from the compression work. So the condenser's load is bigger than the evaporator, and the condenser is divided into two kinds: air cooling type (air cooling condenser) and water cooling type (water cooled condenser).