Desiccant Air Dryer for Compressed Air

Desiccant air dryer for compressed air make full set of the heat generated by the compressor in the compressed gas to regenerate the adsorbent. For ordinary suction dryers, this part of high-temperature heat source needs to be cooled down before use, so this part of heat is wasted in vain, and the compression heat series dryer makes full use of this part of heat to regenerate adsorbent, which is not only economical the electric heater power consumption required by the micro heat drying machine series is reduced, and the gas consumption at this stage is eliminated. Therefore, this product is a good energy-saving product.

● Special adsorbent with high hygroscopicity is selected with uniform shape and size, high strength, low dew point. Less dust and long service life;

● The unique air distribution design ensures that the air distribution is uniform when the high temperature air is heated & regenerated, and also the low temperature air is adsorbed, so that the adsorbent at the edge of the desiccant tower can be fully utilized and the tunnel flow effect can be avoided;

● Low pressure loss;

● Three types of drainage function: liquid level, time and manual operation;

The main functions of the air tank are energy saving and safety. The provision of air storage tank and the selection of appropriate air storage tank shall be considered from the perspective of safe use of compressed air and energy conservation. When selecting air storage tank, safety and energy conservation are important!

1. Gas storage tanks produced by enterprises that strictly implement GB150-2011 Steel Pressure Vessels shall be selected; According to the relevant national regulations, each gas tank must be equipped with a quality assurance certificate when leaving the factory. The quality assurance certificate is the main certificate to prove the qualification of the gas tank. If there is no quality assurance certificate, even if the gas tank is cheap, the user should not buy it to ensure the safety of use.

2. The volume of the air receiver shall be between 10% and 20% of the compressor discharge, generally 15%. When the air consumption is large, the volume of the air receiver shall be appropriately increased; If the gas consumption on site is small, it can be less than 15%, preferably not less than 10%; Generally, the exhaust pressure of the air compressor is 7kg, 8kg, 10kg and 13kg, of which 7kg and 8kg are the most widely used. Therefore, 1/7 of the air volume of the air compressor is generally taken as the selection standard of the tank capacity.

3. When the dryer is installed behind the air receiver, the role of the air receiver is fully reflected, which plays the role of buffering, cooling and blowdown. It can reduce the load of the dryer, and is used for the working condition where the air supply of the system is more uniform. The dryer is installed in front of the air receiver, and the system can provide large peak adjustment capacity, which is mostly used for the working conditions with large gas consumption fluctuations. 4. When selecting and purchasing gas tanks, it is recommended not only to pay low prices, but also to select products from manufacturers with good credit. Nowadays, the brands of gas storage tanks on the market are very mixed. Generally, pressure vessels are designed with a relatively high safety factor. Pressure vessels are also equipped with safety valves. Moreover, the design standards of pressure vessels in China are more conservative than those abroad. Therefore, generally speaking, the use of pressure vessels is very safe.

Desiccant air dryer for compressed air PF series

Design working conditions: working pressure: 8 bar, inlet air inlet temperature: 120℃,

pressure dew point: -40℃

Why can a zero air consumption suction dryer not consume compressed air?

The basic principle of the zero gas consumption adsorption dryer is similar to that of the traditional variable temperature adsorption process. That is, the water absorbed by the adsorbent in the adsorption process. During the regeneration process, the gas with waste heat higher than 110 ℃ from the compressor enters the drying tower as regeneration gas. Depending on the thermal diffusion of hot air, the regeneration gas is separated from the drying tower and carries water vapor out of the drying tower to completely remove the adsorbed water. In order to cool the bed to meet the needs of adsorption in the next stage, and to avoid instability of the dew point at the air outlet due to the bed temperature.

Different from the ordinary dryer, the method of zero gas consumption cooling is to cool all the waste heat gas higher than 110 ℃ in water cooler I to 40 ℃ first, and then enter the regeneration tower as the regeneration cooling gas to cool the adsorbent. After cooling, the temperature rises again, and then it is cooled to 40 ℃ in water cooler II, and then enters the drying tower. After adsorption and drying, it flows out. There is no air consumption in the whole process, and electric heaters, blowers and other power consuming equipment are not used. It can be said that the zero gas consumption waste heat regeneration dryer is a real energy-saving product.

The waste heat regeneration dryer uses the heat generated when the gas is compressed to directly heat the adsorbent in the drying tower to desorb it. We know that no matter what kind of compressor is, when the gas is compressed, it will generate a lot of compression heat. Therefore, after the compressor compresses the gas, it should be equipped with a cooler to cool the gas to normal temperature. Then it is sent to the subsequent equipment for drying. In this way, a large amount of heat energy is wasted. The waste heat regeneration dryer uses this energy.

By using the heat generated during compressed air, compressed air is not consumed during heating and regeneration, and only 2% dry compressed air is consumed during cold blowing. The waste heat of the compressor is fully used to complete the regeneration of adsorbent (the compressor can also save the final cooler), and no blower and electric heater are required. It can save 70% of energy. Today, in the energy crisis, it is indeed an ideal energy-saving dryer.

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