Guangdong EPSEA Industrial Co., Ltd - Fujian EPSEA Indu


2024-01-06 13:58:33

【Technical News】Technical share | Application and energy saving analysis of refrigerated air dryer and adsorption dryer

It is well known that compressed air can be used in various industrial field, however, the compressed air discharged by the air compressor may contain solid particles, water, and even oil, bacteria, other gases and so on. These pollutants will affect production safety, product quality, production efficiency, etc., so it is necessary to dry and purify the compressed air.
Compressed air contains both liquid and gaseous water. Liquid water can be removed through simple mechanical separation, such as spin separation or filtration. Gaseous water is typically removed through cooling or adsorption, a process known as 'drying'. The corresponding equipment for this process is called a 'dryer'. Based on the principles of drying, dryers are classified into refrigerated air dryer and adsorption air dryer types.

The pressure dew point of a refrigerated air dryer is typically between 3 to 10℃. It is important to note that refrigerated dryers cannot achieve a drying effect below 0°C since water below this temperature will freeze and turn into ice.

On the other hand, adsorption air dryer use the principle of adsorption to remove water vapor from compressed air and achieve the desired drying effect. When compressed air passes through the adsorption air dryer, the adsorbent in the adsorption cylinder (usually silica gel, activated alumina, or molecular sieve) removes water vapor from the air, resulting in dry air with a pressure dew point typically ranging from -20°C to -70°C. The switch between adsorption and regeneration is achieved by adjusting the pressure or temperature to control the amount of water vapor adsorbed by the adsorbent.

When low pressure dew point of compressed air is required, an adsorption dryer is almost always the best option.

From a technical standpoint, we will now introduce the advantages and characteristics of EPSEA's heat-less regenerative modular adsorption air dryer and vacuum regenerative modular adsorption dryer.
Our modular adsorption dryer offers several benefits over traditional twin-tower adsorption dryers.
 Advantages of EPSEA modular adsorption dryer:
The heat-less regenerative modular adsorption dryer has a simple structure, stable performance, low failure rate, and very little power consumption, making it the most common choice. 

In comparison to the heat-less regenerative modular dryer, the vacuum regenerative modular dryer produced by EPSEA also offers the following advantages:
The vacuum regeneration modular adsorption air dryer employs a vacuum pump to evacuate the adsorbent bed in the adsorption cylinder. This utilizes the principle that the same mass and flow of re-gas can hold more water vapor in a vacuum state. By using as little re-gas as possible, the dryer removes as much water as possible, saving re-gas and reducing overall energy consumption. The vacuum regeneration modular air dryer ensures continuous and stable output of low dew point finished gas.

It is an efficient and energy-saving product that reduces energy consumption. Energy conservation and emission reduction are basic national policies for energy development, and EPSEA has been working hard in this direction. EPSEA prioritizes innovation, emphasizing R&D and manufacturing of energy-saving and environmentally friendly products. As one of the first companies to introduce modular adsorption dryers and vacuum regenerative modular adsorption dryers in China, EPSEA has obtained over ten patents related to this technology.

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