Adsorption Air Dryer

Brief introduction of suction dryer

A new generation of adsorption dryer, which combines the advantages of pressure swing adsorption and temperature swing adsorption, can adsorb (work) at room temperature and high steam partial pressure; The moisture adsorbed in the medium is completely removed during the regeneration process by the combination of thermal diffusion of high-quality reproduction (dry air heating) and low partial pressure.

Why do you need high-quality air?

Compressed air contains oil, solid particles and water vapor. They mix together to produce harsh, oil-soluble stains that are usually mildly acidic. Without gas treatment, this cloudy mixture will enter the filter separator, corrode the pipeline, damage the pneumatic equipment, and affect the quality of the final product. Ingersoll Rand desiccant dryers maintain the stability of your production process and product quality. Ingersoll Rand adsorption dryer has a series of environmental protection and energy saving functions, which can reduce carbon emissions.

• The loss of less than 0.2bar reduces energy consumption.
• Dew point detection and control, adjust the energy consumption of the dryer to the range of the actual load.
• The leakage point can be adjusted, and the dryer can be adjusted according to specific requirements.

How does an adsorption dryer work?

When the wet and cold gas immediately flows through the desiccant, its moisture will be absorbed by the desiccant. The function of the dryer to absorb moisture is limited. The desiccant that has absorbed moisture must be dried or regenerated before it can absorb moisture again. Therefore, it is convenient to forcibly separate the desiccant from the adsorption by dealing with the drying tower equipped with a saturated desiccant to perform the blood pressure lowering operation. The actual whole process varies with the type of dryer:

• The heatless adsorption dryer completely uses compressed air as the desorption medium.
• The micro-heat adsorption dryer uses an external heater, and the compressed air is heated as the desorption medium.

Selection

The compressed air adsorption dryer is an optional equipment for compressed air drying in the following cases: ① When the “pressure dew point” of the compressed air is required to be lower than zero; The lowest atmospheric dew point that can be achieved (because the compressed air processed by the refrigerated dryer will still condense liquid water when the ambient temperature is lower than -17~-23°C.)

Precautions for drying machine:

The oil content of the air entering the tower should be controlled below 0.01mg/m3; since the oil-free air compressor cannot be truly oil-free at present, in order to prevent the accumulation of trace oil in the adsorption bed (this accumulation is very fast), the dryer It is necessary to install a degreaser at the air inlet;

The adsorption dryer should be used under rated temperature and pressure conditions. When the inlet temperature is higher than or the inlet pressure is lower than the rated value, capacity correction should be carried out;

When the adsorption dryer is used in conjunction with the piston air compressor, a stabilized air storage tank should be installed in front of it to eliminate the high-speed impact of the pulsating air flow on the adsorbent;

Avoid deliberately “saving energy” to reduce regeneration gas consumption (including regeneration gas volume and heating power);

When there is a “pre-air dryer”, the connection between the adsorption dryer and the air dryer should be installed separately as long as the site permits, so as to reduce the air pressure drop, improve the ventilation conditions of the air dryer and facilitate daily maintenance and repair;

When the air supply is sufficient, the heatless regenerative dryer should be considered. Its comprehensive energy consumption will not be higher than that of heating regeneration, and its dew point is lower and more stable.

Ingersoll Rand chooses the right vacuum dryer for you

Ingersoll Rand adsorption dryer solutions, including imported BD+blast heat and BD+ZP zero gas consumption double-tower type, imported CD(+) heatless module type, Wuxi CD(+) heatless double-tower type, Wuxi AD(+) micro-heating twin-tower type , etc., can meet your various application requirements.

Heatless desiccant dryers are more expensive because they use a lot of compressed air for regeneration during the reconditioning period. Typically, the amount of regeneration air is 16% to 26% of the rated flow of the heatless dryer. However, heatless air dryers remain a popular choice due to their ease of use and reliability in operation. Due to its compact design, the heatless desorption dryer is ideal in harsh environments, including remote areas, hazardous sites with flammable gases and powders, and high tunnel temperature operating conditions.

The energy consumption of the dryer is determined by its internal consumption and the efficiency of the recycling process. If the adsorption dryer has a high loss, the compressor discharge pressure needs to be higher, which increases energy consumption and operating costs. Ingersoll Rand AD(+) and CD(+) desiccant dryers have a low pressure drop (less than 0.2bar/2.9psi for most models) and an efficient regeneration process.

Switching between the two towers according to the dew point significantly saves energy consumption. Ingersoll Rand’s AD(+) and CD(+) desiccant dryers feature built-in dew point control switching technology and incorporate advanced energy management controls. The principle is simple, the dew point sensor will delay the switching of the drying tower, and only switch the dual towers when the desiccant state is saturated.