Why use a cold dryer? Because the water in the compressed air will destroy the gas equipment, resulting in problems such as high maintenance cost of gas equipment, low production efficiency, high scrap rate, large pipeline pressure drop, high energy consumption of air compressor and so on. Refrigerated compressed air drying equipment is called cold dryer for short. It aims to remove a large amount of liquid water and gaseous water. If there is still water in your production, it can basically be said that the cold dryer you use does not meet the requirements and needs to be replaced with a better dryer!

1、 Drying effect

1. No ice! 2 ℃ is the critical point of ice water. If the compressed air is frozen at 2 ℃, the drying effect will be guaranteed. At this time, the liquid water will reach the maximum value of Zui. If the temperature is too low, the internal ice will block the freezing crack system (just like the freezing crack of vehicle water tank in winter). In particular, the plate exchange cooler and dryer is prone to freezing crack due to small internal clearance. Solution: install a constant pressure holding valve.

2. The water at the inlet end is drained. If the dryer has an inlet pre drainage device, a large amount of water will not participate in the freezing, but the light-weight compressed air will be frozen. The load of the dryer is small and the freezing effect is Zui good.

3. The condensed water at the evaporation end shall be completely removed in time. If a large amount of water generated by freezing is accumulated in the cold dryer, resulting in loss of drying effect, large pressure difference, insufficient on-site pressure, frequent loading and unloading of air compressor, low efficiency of air compressor system, increased power consumption, and a large number of electricity bills are wasted.

2、 Durable

1. Iron, aluminum and copper are not corrosion resistant, and stainless steel is Zui a good material choice.

Corrosion! The gas circuit system of the cold dryer has been sucked into various acid-base gases by high temperature, high humidity and high oxygen for a long time, and the corrosion rate is intensified, which is easy to cause corrosion perforation. The whole cold dryer is scrapped. Most of the cold dryers are made of iron, aluminum and copper materials, which have poor corrosion resistance, so new cold dryers need to be purchased from time to time to maintain the effect. Generally, they need to be replaced 2 or 3 times in 10 years, Stainless steel can eliminate these problems. Due to its high cost and difficult manufacture, it is less on the market.

2. High and low temperature resistance: the test faced by the chiller dryer is the extremely hot and cold ambient temperature all year round, and the sudden cold and hot inlet temperature caused by the start and stop of the electronic temperature control fan of the air compressor. As a result, there is still water on the site with a common chiller dryer, which can not be solved. Solution: the energy storage chiller dryer has strong buffer capacity and is equipped with a high-efficiency large-scale refrigeration compressor.

3、 Energy saving

1. Low pressure drop: the dryer is connected in series on the compression system pipeline to cause different pressure drop. To achieve Zui low pressure drop, it is necessary to have enough heat exchange channels inside the dryer. Although this increases the manufacturing cost of the dryer, it is Zui of great value to users. For example, the pressure drop of the dryer can be reduced by 0.05Mpa, the load pressure of the air compressor can be reduced by 0.05Mpa, and the air compressor system can save energy by 4%, For example, a 37 kW small air compressor can reduce the energy consumption by 65000 kW after replacing the cold dryer and running continuously for 5 years!

2. High heat exchange efficiency. In order to obtain high heat exchange efficiency, there is only one way to increase the heat exchange area under the condition of the same heat exchange material

3. The standard for judging the drying effect of the dryer depends on the drainage capacity of the dryer under the same conditions, rather than whether there is a temperature difference between the air inlet and exhaust pipes. The excellent cold dryer is equipped with a temperature return device to precooling the air inlet and regenerate the exhaust, so as to keep the cooling capacity Zui inside to a large extent without waste, so as to achieve Zui low cooling power consumption, no condensation of the air outlet pipe No night sweats.

4. High efficiency compressors, such as household air conditioners and refrigerators, have energy efficiency grades of 1 to 5. For long-term equipment, it is very necessary for users to choose high-efficiency compressors.

5. The control system is advanced, including PLC, soft start, frequency conversion, permanent magnet motor, traditional pressure switch start and stop. The traditional old way not only wastes a lot of power expenditure, but also Zui shortens the service life of the compressor.

6. For air inlet and drainage, try not to let the liquid water brought by the air inlet participate in the freezing. The cold dryer equipped with air inlet and drainage only freezes the compressed air dryer with less workload Zui, low load Zui and less energy consumption.

7. (use less condenser fan) the compressed gas is used to take away the heat. The air outlet end of the cold dryer carries out the heat of the dryer to dissipate the heat. At the same time, the compressed air is heated and the gas expands. The user gets a larger volume of compressed gas and superheated compressed gas, which further ensures the energy-saving and anhydrous drying effect.

8. The heat is taken away by the evaporation of the discharged condensate. The operation of the cold dryer will produce a large amount of low-temperature condensate. Some dryer factories use these cold energy to further reduce the power consumption of the dryer (gasification and evaporation will take a large amount of heat, just like it takes a long time to heat and boil a pot of water). The condenser fan basically does not work, There is no need to purge the condensing radiator.

9. The electronic drainer controls the drainage by time, which will inevitably discharge a large amount of expensive compressed air. Solution: use the liquid level drainer without gas loss.

To sum up, the dryer plays the role of "water removal" of the air compression system. How to select a relatively Zui dry and energy-saving dryer, we should strictly investigate the products, so as to keep the air compression system dry, energy-saving and stable operation for a long time. The cold dryer is equivalent to the water filtering function of the "kidney" of our human body system. If the dryer is really needed to remove water in production, we should buy a better "kidney". If there is water in production, it doesn't matter. We simply don't have a dryer to save money, electricity and worry. What do you say?