Before or after the air storage tank

The cold dryer should usually be installed behind the gas storage tank this configuration has significant advantages in industrial applications, as analyzed below:

1. the core role of the front of the gas storage tank

1. pretreated compressed air
   the compressed air discharged from the screw air compressor has high temperature, high water content and pulse fluctuation. The tank is pre-treated:

   • cooling: The high-speed airflow hits the wall of the gas storage tank to generate backflow, which causes the temperature to drop rapidly and promotes the liquefaction of a large amount of water vapor.
   • gravity separation: Liquid water and oil droplets settle in the gas storage tank and are discharged through the bottom drain valve to reduce the load of subsequent equipment.
   • Voltage stabilizing buffer: Balance the fluctuation of gas consumption, avoid frequent start and stop of air compressor, and extend the life of equipment.

   Data support: The air storage tank can reduce the liquid water content of compressed air by 60%-70%, and the frost risk of the evaporator of the cold dryer can be reduced by more than 50%.

2. Protect the cold dryer

   • reduce load: The water content of the air after pretreatment of the air storage tank is reduced, and the cold dryer does not need to process a large amount of liquid water, and the water removal efficiency is increased by 15%-20%.
   • life extension: The air cleanliness after pre-filtering is higher, and the filter replacement cycle of the cold dryer can be extended by 2-3 times.
   • stable operation: The air storage tank eliminates air flow fluctuation, makes the cold dryer run at the best efficiency point (load rate 60%-80%), and improves the comprehensive energy efficiency ratio by 0.1-0.15 kW/m & sup3;/min.

Necessity of Post -2. Cold Dryer

1. depth water removal
   the cold dryer reduces the air temperature below the dew point through compression refrigeration to further remove the residual water vapor and ensure that the water content of the compressed air meets the ISO 8573.1 standard (such as the pressure dew point ≤ 10 ℃).

2. Meet high-precision requirements
   for electronic manufacturing, food packaging and other scenarios, the rear of the cold dryer can ensure that the compressed air quality is stable and up to standard, to avoid water vapor damage to equipment or products.

Long-term benefits of 3. front-end gas storage tanks

1. reduce maintenance costs
   • the failure rate of the cold dryer decreased by 40% and the maintenance frequency decreased.
   • The filter replacement cycle is extended and the cost of consumables is reduced.
2. Extend equipment life
   • the heat exchange efficiency of the cold dryer decreases from 8%-10% to 2%-3% per year, and the service life of the equipment is extended by more than 30%.
   • The frequent start and stop times of the air compressor are reduced, the wear is reduced, and the service life is extended.
3. Energy saving and efficiency
   • the pressure stabilizing function of the air storage tank reduces the energy consumption of the air compressor by 5%-8%.
   • The operating efficiency of the cold dryer is improved, and the comprehensive energy efficiency ratio is optimized.

Exceptions to 4. special scenarios

only in the continuous production scenario with extremely small fluctuation of gas consumption (such as chemical process control, power instrument purging), and the pressure dew point requirement is not strict (≤ 15 ℃), the cold dryer front can be considered. However, the following remedial measures are required:

• configure double-tower cold dryer to improve water removal efficiency.
• Add electronic drain valve and level sensor linkage device to prevent the accumulation of condensate.
• Select DB double-effect energy-saving frequency conversion cold and dry machine to match the load change.

Even so, the cost of equipment investment will still increase by 15%-20%, and the frequency of maintenance needs to be increased.