Heatless Compressed Air Dryer

Heatless compressed air dryer 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.

● High efficiency and energy saving;

● The pressure dew point can reach-20 ℃~-40 ℃;

● Equipped with imported brand PLC controller to realize interlocking function;

● High quality switching valve,stable and reliable, can ensure the integrity of the working process and prolong the working life of component;

● 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;

Activated alumina, also known as activated alumina, or Reactive alumina in English, is a porous, highly dispersed solid material with a large surface area. Its microporous surface has the characteristics required by catalysis, such as adsorption performance, surface activity, excellent thermal stability, etc., so it is widely used as a catalyst and catalyst carrier for chemical reactions. Activated alumina has selective adsorption ability for gas, steam and some liquid moisture. After saturated adsorption, the water can be removed by heating at about 175-315 ℃ to revive. Adsorption and reactivation can be carried out many times. The dew point of activated alumina in the air separation industry can reach - 55 degrees.

The working principle of the dryer (adsorption dryer) is to reduce the moisture content in the compressed air by using the characteristics of the adsorbent to adsorb moisture. Generally speaking, the pressure dew point of the outlet gas of the dryer reaches - 20 ℃~- 70 ℃. Common adsorbents of the dryer include activated alumina, molecular sieve, etc. When the dryer needs to obtain extremely dry compressed air (dew point below - 60 ℃), molecular sieve is the only choice.

Molecular sieve is a kind of material with uniform micropores, whose pore size is equivalent to that of ordinary molecules. Molecular sieve is widely used as efficient desiccant, selective adsorbent, catalyst, ion exchanger, etc. Compared with other adsorption materials, molecular sieves are characterized by their uniform microporous structure, which can selectively adsorb gaseous molecules with diameters smaller than their pore diameters. Molecular sieves are generally artificially synthesized, and more molecular sieves obtained in the air drying (separation) process are zeolite type aluminosilicate hydrated compound crystals. It has high thermal stability and chemical stability, and also has the characteristics of screening performance, ion exchange performance, selectivity and good adsorption performance. It is usually used in the adsorption chamber of the adsorption dryer.

The compressed air discharged from the rear cooler of the air compressor is a kind of supersaturated compressed air, which contains a certain amount of condensate. Generally speaking, a small amount of condensate has little impact on the dryer, but when the condensate increases, there is no gas water separator and filter installed in front of the dryer, or a large amount of condensate enters the adsorption tower due to abnormal factors, the adsorption will deteriorate and the dew point temperature will rise sharply, If it is serious, it will cause the adsorbent to break into powder (specifically: powder is sprayed from the muffler, and the rear dust filter is blocked) and the adsorbent must be replaced.

Heatless compressed air dryer PB series

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

pressure dew point: -20°C

Heatless compressed air dryer 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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