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Heatless adsorption dryer 2

Sollant Heatless Adsorption Dryer Manufacturer

Regeneration gas volume: ≤14%~20%
Working pressure: 0.6~1.0Mpa
Intake oil content: ≤0.1mg/m³
Product gas pressure dew point: -20℃~-40℃
Desiccant: activated alumina
Working cycle: 10~20 minutes
Intake temperature: 0℃~45℃
Power supply: 220V/50Hz

» Features

  • Large-sized tower body ensures air flow rate and contact time
  • High-performance adsorbent with stable performance and long service life
  • Large displacement muffler
  • Stainless steel check valve, air diffuser
  • Electrical box IP54


» Reliable design

  • Supporting ceramic balls are used at the bottom of the adsorption tower to make the air distribution more uniform, which can prevent the adsorbent at the bottom from soaking in water and prolong the life of the adsorbent;
  • With the specially designed stainless steel shunt, the pressure loss can be greatly reduced.
  • Special customized high-performance adsorbent can achieve excellent dew point.
  • The standard configuration of the whole series is a high-performance pneumatic valve, and its reliability and pressure loss during operation are much better than that of diaphragm valves and solenoid valves.
  • The standard configuration is the high-efficiency oil removal and dust removal filter for air control valve control.


» Working principle

The heatless regenerative adsorption dryer uses "pressure swing adsorption" to achieve the drying effect. Since the ability of the air to hold water vapor is inversely proportional to the pressure, a part of the air after drying (called regeneration gas) decompresses and expands to atmospheric pressure. This pressure change makes the expanded air drier, and then it flows over the desiccant layer that is not connected to the airflow to be regenerated (that is, the drying tower that has absorbed enough water vapor), and the dry regeneration air sucks out the moisture in the desiccant, and the It is taken out of the dryer to achieve the purpose of dehumidification.

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The Role of Heatless Adsorption Dryers in Compressed Air Systems

Compressed air systems are the unsung heroes of industry, quietly powering a multitude of applications across diverse sectors. From manufacturing and automotive to food processing and pharmaceuticals, the use of compressed air is pervasive and indispensable. It serves as the lifeblood of many operations, driving pneumatic tools, controlling processes, and even ensuring safety in critical environments.

In nearly every corner of the industrial landscape, compressed air plays a pivotal role, often functioning as the hidden force that keeps machinery humming and production lines moving. Its versatility knows no bounds, making it a fundamental utility in countless processes.

While compressed air is a versatile and invaluable resource, it is not without its challenges. Moisture, in the form of water vapor, is a common adversary in compressed air systems. When left unchecked, it can wreak havoc on equipment and undermine product quality.

Imagine moisture entering a precision instrument, causing corrosion and impairing its accuracy. Consider a production line in a food processing plant where moisture-laden air contaminates products, leading to quality control issues and safety concerns. In these scenarios and countless others, the importance of dry air becomes abundantly clear.

Moisture-free compressed air is the linchpin for maintaining equipment efficiency, product quality, and overall operational reliability. It ensures that the machinery and tools powered by compressed air operate at peak performance, minimizing downtime and costly repairs. Furthermore, in industries with stringent quality control standards, dry air is non-negotiable.

Understanding Moisture in Compressed Air

A. The Source of Moisture

Moisture in compressed air systems originates from various sources, each contributing to the challenge of maintaining dry air.

  • Atmospheric Air: Compressed air systems begin by drawing in atmospheric air, which naturally contains moisture in the form of water vapor. The moisture content in the air depends on factors such as temperature and humidity. When this moist air is compressed, the water vapor becomes concentrated.
  • During Compression: The act of compressing air itself generates heat. As compressed air cools downstream, its capacity to hold moisture diminishes. This leads to the condensation of water vapor, which can accumulate in the compressed air.

B. Impact of Moisture

Moisture, when left unchecked, can have profound and detrimental effects on compressed air systems and the equipment they power.

  • Corrosion: Water and metal are not friendly companions. Moisture can lead to corrosion within pipes, tanks, and equipment. Corroded components can weaken, leading to leaks and potentially catastrophic failures.
  • Reduced Efficiency: Moisture-laden air tends to have lower energy efficiency. The water vapor in the air can interfere with the operation of pneumatic tools and machinery, leading to decreased performance and increased energy consumption.
  • Increased Maintenance: Moisture-related issues require frequent maintenance and repair. This translates to downtime, increased labor costs, and the need for replacement parts, all of which can impact production schedules and profitability.

C. The Need for Moisture Removal

Given the adverse effects of moisture, the removal of water vapor from compressed air is not just a luxury but a necessity.

  • Protecting Equipment: Removing moisture helps protect equipment from corrosion and premature wear and tear. This extends the lifespan of machinery and tools, reducing the need for costly replacements.
  • Maintaining Air Quality: In industries like food processing, pharmaceuticals, and electronics manufacturing, air quality is paramount. Moisture can contaminate products, compromise sterile environments, and lead to costly quality control issues. Dry air is a fundamental requirement to maintain the integrity of processes and products.
  • Energy Efficiency: Dry air is more energy-efficient. Removing moisture can reduce the energy consumption of compressed air systems, leading to cost savings and a smaller environmental footprint.

In essence, the need for moisture removal in compressed air systems is not just a matter of convenience; it’s a critical step in ensuring the reliability, efficiency, and quality of industrial processes. Heatless adsorption dryers play a vital role in achieving this goal, and their inner workings will be explored in the subsequent sections of this article.

Introduction to Heatless Adsorption Dryers

Defining Heatless Adsorption Dryers

Heatless adsorption dryers are a class of industrial equipment designed to remove moisture from compressed air systems, ensuring the delivery of dry and reliable compressed air. These dryers employ a unique and highly effective approach to moisture removal.

At their core, heatless adsorption dryers consist of chambers filled with desiccant material, typically activated alumina or silica gel. Compressed air flows through these chambers, and the desiccant material acts as a sponge, trapping and adsorbing moisture from the air. This process allows heatless adsorption dryers to achieve extremely low dew points, ensuring that the compressed air remains moisture-free, even in demanding industrial environments.

The Unique Principle of Adsorption

The standout feature of heatless adsorption dryers is their adsorption-based moisture removal principle. Unlike some other dryer types that use heat to evaporate moisture (such as heated desiccant dryers), heatless adsorption dryers rely on adsorbent materials to physically capture and hold moisture molecules. This adsorption process is highly effective in removing even trace amounts of moisture from the compressed air.

When the desiccant material becomes saturated with moisture, it requires regeneration. This regeneration process typically involves depressurizing the chamber, purging the captured moisture, and then returning the dryer to its operational state. Heatless adsorption dryers are designed to alternate between drying and regeneration cycles automatically, ensuring continuous moisture removal without the need for external heat sources.

The Significance of ‘Heatless’

The term “heatless” in the name of these dryers is significant because it highlights their energy-efficient design. Unlike some other dryer types that require external heat sources for regeneration (such as heated desiccant dryers), heatless adsorption dryers do not rely on additional heating elements.

This heatless design translates to reduced energy consumption, making them an attractive choice for industries focused on energy efficiency and cost savings. It also simplifies the dryer’s operation and maintenance, as there are no heating elements to manage.

In summary, heatless adsorption dryers are characterized by their innovative use of adsorption materials to remove moisture from compressed air, their ability to achieve low dew points, and their energy-efficient, heatless design. In the following sections, we will delve deeper into how these dryers work and the benefits they offer in maintaining dry and reliable compressed air systems.

How Heatless Adsorption Dryers Work

The functionality of heatless adsorption dryers centers around a carefully orchestrated adsorption cycle, designed to eliminate moisture from compressed air. This cycle involves several distinct steps:

Adsorption: Compressed air, laden with moisture, enters the dryer’s adsorption chamber. Within this chamber resides the desiccant material, typically composed of activated alumina or silica gel. As the air flows through the desiccant bed, the desiccant acts like a sponge, capturing and adsorbing moisture molecules from the air.

Drying Phase: During this phase, the dryer is in active operation, and the desiccant material steadily collects moisture. The compressed air exiting the chamber is significantly drier, with its moisture content dramatically reduced.

As the desiccant material becomes saturated with moisture, it reaches a point where it must be regenerated to maintain its effectiveness. The regeneration phase is a crucial aspect of the heatless adsorption dryer’s operation:

Depressurization: The first step in regeneration involves depressurizing the adsorption chamber. This reduces the air pressure within the chamber, allowing the desiccant to release the captured moisture.

Purge Cycle: After depressurization, a portion of the dried, low-moisture air from the outlet is redirected into the adsorption chamber. This dry air serves as a purge gas, sweeping through the desiccant bed and carrying away the moisture that has been adsorbed. The purge cycle effectively cleanses the desiccant, preparing it for another drying phase.

Repressurization: Once the regeneration process is complete, the adsorption chamber is repressurized to prepare it for the next adsorption cycle. The dryer then seamlessly transitions back into the drying phase.

One of the remarkable features of heatless adsorption dryers is their ability to control the dew point of the compressed air. The dew point is the temperature at which moisture within the air begins to condense into liquid water. By carefully managing the adsorption and regeneration phases, these dryers can achieve specific dew points, even in demanding industrial environments.

The control over the dew point is a critical factor in ensuring that the compressed air remains dry and moisture-free throughout its journey in the compressed air system. Industries with stringent requirements for dry air, such as electronics manufacturing and pharmaceuticals, benefit greatly from this capability.

In essence, the intricate dance between the adsorption and regeneration phases, coupled with precise control over the dew point, empowers heatless adsorption dryers to deliver dry and reliable compressed air consistently. This reliability, along with their energy-efficient design, makes them indispensable in a wide range of industrial applications.

Advantages of Heatless Adsorption Dryers

A. Energy Efficiency

One of the standout advantages of heatless adsorption dryers lies in their exceptional energy efficiency. This efficiency stems from their “heatless” design, which eliminates the need for external heating elements. Instead, these dryers rely on the principles of adsorption to remove moisture from compressed air, making them inherently energy-efficient.

In contrast, some other drying methods, such as heated desiccant dryers, require substantial amounts of energy to generate the heat necessary for the regeneration phase. Heatless adsorption dryers, on the other hand, simply redirect a portion of the already dried compressed air for regeneration, resulting in significant energy savings. This reduced energy consumption not only lowers operational costs but also aligns with sustainability goals by reducing carbon emissions.

B. Consistent Performance

Heatless adsorption dryers are renowned for their ability to maintain consistent moisture control performance over time. This reliability is critical in industries where uninterrupted production and equipment longevity are paramount.

The adsorption and regeneration cycle of these dryers ensures that the desiccant material remains effective by periodically cleansing it of moisture. As a result, these dryers can consistently deliver dry compressed air with low dew points, preventing the moisture-related issues that can plague other drying methods. This reliability translates into longer equipment lifespan, reduced maintenance requirements, and enhanced overall system efficiency.

C. Reliability in Varied Applications

Heatless adsorption dryers find their utility across a wide spectrum of industries and applications. Their versatility makes them suitable for use in manufacturing, pharmaceuticals, electronics production, food processing, and more.

In manufacturing, these dryers ensure that pneumatic tools and machinery operate at peak performance, reducing downtime and improving product quality. In pharmaceuticals, where sterility is paramount, heatless adsorption dryers help maintain the integrity of processes by providing dry, contaminant-free compressed air. In electronics manufacturing, they play a critical role in preventing moisture-related defects in sensitive components. The adaptability of heatless adsorption dryers makes them a reliable choice in addressing moisture control challenges across diverse industrial settings.

In summary, heatless adsorption dryers offer a trifecta of advantages: energy efficiency, consistent performance, and versatility. Their energy-saving design, combined with their ability to provide reliable moisture control, makes them indispensable in industries where dry and dependable compressed air is a necessity. Whether in the heart of manufacturing or the clean rooms of pharmaceutical facilities, these dryers play a crucial role in maintaining operational excellence.


In conclusion, heatless adsorption dryers play a central and indispensable role in ensuring the integrity of compressed air systems. These remarkable devices effectively eliminate moisture from compressed air, safeguarding equipment, processes, and product quality. Through their energy-efficient, heatless design, they provide a reliable and sustainable solution for industries that rely on dry and dependable compressed air.

In our ever-evolving industrial landscape, moisture control in compressed air systems remains as crucial as ever. The detrimental effects of moisture, such as corrosion, reduced efficiency, and increased maintenance, can significantly impact operations. Heatless adsorption dryers stand as a testament to innovation in moisture control, offering a reliable and efficient means to combat these challenges.

As industries continue to prioritize efficiency, sustainability, and product quality, the role of heatless adsorption dryers remains enduringly significant. By investing in these systems, businesses can ensure that their compressed air remains consistently dry, reliable, and ready to support their operations, both now and in the future. In the grand orchestra of industrial processes, heatless adsorption dryers play a key note, harmonizing efficiency, reliability, and moisture control for years to come.