Heat Of Compression Desiccant Air Dryer

According to the principle of pressure swing adsorption, the dryer absorbs most of the water in the desiccant by contacting the saturated compressed air from the upstream with the desiccant under a certain pressure, and the dry air enters the downstream to work, so as to achieve deep drying. After the technical upgrading and energy-saving transformation, the zero consumption gas compression regenerative adsorption compressor has higher air quality and lower energy consumption.

The zero consumption air compressor heat regeneration dryer replaces the micro heat dryer and the non heat dryer, which are suitable for centrifuges and oil-free screw machines (the final cooler needs to be removed). The waste heat regeneration of the air compressor is fully used to reduce the power consumption, and the regeneration of the regeneration gas has no gas emission, without increasing the air energy consumption.

Heat of compression desiccant 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.

● 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;

Heat of compression desiccant air dryer PB series

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

pressure dew point: -20°C

How to select low pressure refrigeration air dryer,desiccant air dryer for compressed air and air-cooled combined type air dryer?

1. Refrigerated dryer:

The freezing dryer applies the physical principle to freeze the moisture in the compressed air below the dew point, so that it can be separated from the air. It is simply understood as cooling water. However, due to the freezing point temperature of water, theoretically, the dew point temperature of the refrigerated dryer can be close to 0 ℃, but not reach 0 ℃.

After the compressed air flows into the evaporator, it exchanges heat with the refrigerant through the heat exchange function of the evaporator. The heat in the compressed air is taken away by the refrigerant, and the compressed air cools rapidly. The moisture in the moist air reaches the saturation temperature and condenses rapidly. The condensed moisture forms water droplets after condensation. After separation, the water is discharged from the automatic drain valve.

The dew point of the air pressure treated by the refrigeration dryer can be as low as 2 degrees. The air with this dew point can basically meet the requirements of general equipment for gas moisture content. If the gas with a lower dew point is required, an adsorption dryer is required.

2. Adsorption dryer:

The principle of the adsorption dryer is that the saturated compressed air uses the difference between water and air molecular volume to filter the saturated water vapor in the compressed air by using the special molecular sieve for gas purification, which can easily adsorb the water molecules in the molecular sieve particles, and then use the regeneration method to restore the molecular sieve to restore its water absorption capacity. In short, the drying effect is achieved through the principle of pressure swing adsorption.

We generally divide adsorption dryers into heatless regeneration adsorption dryers and slightly heated regeneration adsorption dryers. The dew point of heatless regeneration is higher than that of slightly heated regeneration, the dew point of heatless regeneration is about - 20 ℃, and the minimum temperature of slightly heated regeneration is - 40 ℃. Most of the equipment gas can meet the requirements. For the instrument gas with high requirements, it is time to consider the combined dryer

3. Combined dryer:

The combined dryer can be simply regarded as the combination of the freezing dryer and the adsorption dryer, but it is not a simple series connection, but a combination of the advantages of the two, giving full play to the advantages of the freezing dryer and the adsorption dryer. The dew point of the combined dryer can reach below - 60 ℃, which is the first choice for precision equipment instrument gas.

Their advantages and disadvantages are also obvious:

Refrigerated dryer: the price is relatively cheap, and the cost of daily maintenance is low, but the dew point of the treated gas is high, which is not suitable for precision equipment.

Adsorption dryer: the price is moderate, the adsorbent in the adsorption barrel needs to be replaced regularly, and the dew point of the treated gas is generally above - 40 ℃. It is suitable for gas demand of most equipment.

Combined dryer: the price is expensive, and the adsorbent needs to be replaced regularly. The gas dew point is about - 60 ℃, which can meet the gas demand of precision instruments.

Why choose the zero consumption air compression regenerative adsorption dryer?

Why should compressed air be dry?

The air directly discharged from the air compressor contains many impurities, mainly composed of water, oil and particulate impurities. If it is not treated and used directly, the impurities in the air will cause great harm to the components in the system, increase the maintenance cost of the equipment, shorten the service life, and pollute the product seriously, resulting in the scrapping of the product. The production cost is not controlled. The commonly used drying methods in pneumatic technology mainly include freezing method and adsorption method - freezing dryer and adsorption dryer.

Conventional model - large energy consumption in later use

According to the principle of refrigeration and dehumidification, the dryer cools the saturated compressed air from the upstream to a certain dew point temperature through heat exchange with the refrigerant, condenses out a large amount of liquid water, which is automatically discharged out of the dryer after being separated by the gas-liquid separator, so as to achieve the purpose of water removal and drying.

According to the principle of pressure swing adsorption, the dryer absorbs most of the water in the desiccant by contacting the saturated compressed air from the upstream with the desiccant under a certain pressure, and the dry air enters the downstream to work, so as to achieve deep drying.

After the technical upgrading and energy-saving transformation, the zero consumption gas compression regenerative adsorption compressor has higher air quality and lower energy consumption.

Why choose the zero consumption air compression regenerative adsorption dryer?

The zero consumption air compressor heat regeneration dryer replaces the micro heat dryer and the non heat dryer, which are suitable for centrifuges and oil-free screw machines (the final cooler needs to be removed). The waste heat regeneration of the air compressor is fully used to reduce the power consumption, and the regeneration of the regeneration gas has no gas emission, without increasing the air energy consumption.

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