Working principle of compressed air dryer
1, working principle of freeze-dryer.
The frozen compressed air dryer condenses the water vapor in the compressed air into water droplets by cooling, thus achieving the purpose of reducing the moisture content. Condensed droplets are discharged from the dryer through an automatic drainage system.
2. Working principle of micro-thermal regenerative adsorption dryer
Micro-thermal regenerative adsorption dryer adopts double-tower alternating working mode. Compressed air enters the dryer A tower through the valve 1A (valve 1B is closed), and the gas is dehydrated and dried under the unique adsorption of adsorbent. The finished gas reaches the gas consumption point through the valve 5a (closed by the valve 5b). At the same time, about 5% of the dry gas source is heated by the heater, and then enters the B tower through the valve 4b (closed by the valve 4a) for a period of time. After stopping heating, it enters the cold blowing stage to cool the adsorption bed of tower B of the dryer (for the next cycle), and then it is discharged into the atmosphere through the muffler. Before switching in the second half cycle, close the valve 2B and open the valve 1B to equalize the pressures of the two towers, so as to complete the switching (to ensure the stability of gas pressure and avoid the impact jitter of the dryer), and at the same time, the second half cycle starts to work (the dryer tower B works and the dryer tower A regenerates), and the process is similar to that of the first half cycle.
3. Working principle of combined dryer
Combined dryer is a reasonable combination of freeze dryer and adsorption dryer. The air treated by the cold dryer does not pass through the precooler to recover the temperature, and then directly enters the adsorption dryer after being drained from the steam-water separator of the cold dryer. At this time, the temperature of dry air is about 2℃-5℃, and the dew point is about 5℃. At this time, enter the adsorption dryer to continue deep adsorption, and the lower the temperature, the better the dew point. Therefore, the combined dryer can reach a more stable pressure dew point. Before entering the adsorption dryer, a part of water has been removed by the cold dryer, which reduces the workload of the adsorption dryer. Therefore, the switching time of the adsorption dryer can be prolonged, thereby reducing gas consumption.
Characteristics of compressed air dryer
1, freeze dryer
(1) Production shall be carried out in strict accordance with QS ISO900 1GB standards and pressure vessel inspection specifications to ensure long-term safe, efficient and reliable operation of products.
(2) Simple installation, simple operation and convenient maintenance.
(3) The refrigeration components and control elements are all made of international high-quality brands, so as to prolong the service life.
(4) Based on the standard design, the heat exchanger increases the heat transfer area, which makes the heat transfer efficiency better and ensures the stability of the dew point of the machine.
(5) The specially designed secondary condenser makes perfect use of the outlet cold source, which ensures the refrigeration effect of the machine refrigeration system, increases the outlet temperature of compressed air, saves energy and avoids the loss caused by condensation on the pipeline.
(6) An efficient gas-water separation device cooperates with an excellent automatic drain valve to continuously and stably discharge the condensed water out of the machine.
(7) Safe and reliable protection devices (the machine is equipped with high-precision protection devices such as high-voltage switch, low-voltage switch, water condenser safety valve and overload relay).
(8) The product can accept a variety of special customization (throughput greater than 143Nm/min, special specifications, materials, temperature, pressure, control mode, etc.). ).
2. Adsorption dryer
(1) Production shall be carried out in strict accordance with ISO900 1, GB standard, QS and pressure vessel inspection specifications to ensure the safe and reliable operation of products. Demanding perfect design brings long-term efficient and stable operation of products; Using excellent heating elements, the temperature of regeneration gas is increased, and the regeneration air volume only needs 6% of the treatment capacity.
(2) The E-CTRL series microcomputer control panel is a real-time operating system based on advanced microprocessors, which can control and monitor comprehensively through a concise and clear user interface. Users can identify any situation during the operation of the dryer at the first time to ensure that it is used for sensitive applications. At the same time, E-CTRL is also equipped with remote control port and joint control port to meet the special needs of users.
(3) Pneumatic valves and control valves adopt international high-quality brands, and are equipped with specially designed refueling system and oil recovery system, which not only improves the service life and stability, but also conforms to the environmental protection concept advocated by Safir.
(4) The valve switching is controlled by a microcomputer program controller, which has stable performance, ensures that there is no gas failure when the adsorption tower is switched, avoids the impact of airflow on the adsorbent, and prolongs the service life of the adsorbent.
(5) The product can accept a variety of special customization (throughput greater than 1 10Nm/min, special material, dew point temperature -70℃, high pressure above 0.98MPa, special control mode, etc.). ).