Internally Heated Air Dryer
A next-generation energy-efficient solution for moisture-free compressed air
At Harsiddhi Air Solution, we design and manufacture Internally Heated Air Dryers. These air dryers provide reliable moisture-free compressed air and maximum energy efficiency. Our air dryers are constructed for industrial environments, and they are designed to have low purge air usage while providing stable dew points for consistent performance in high-quality compressed air systems.
Internally Heated Desiccant Air Dryers are a more efficient version of heatless dryers, which effectively reduce purge air while continuing reliable and dry performance.
What is an Internally Heated Air Dryer?
An Internally Heated Air Dryer is a twin tower desiccant type dryer which uses heat and a small amount of dry purge air for regeneration. Heatless dryers will typically use 15-20% of purge air, where an Internally Heated Dryer will only utilize 5-7% of that dry purge air thereby reducing operating costs.
As the dry purge air travels into the regeneration tower, electric heaters internal to the tower heat that dry purge air, which improves the desiccant regeneration efficiency and reduces the amount of purge air needed for regeneration. This is what makes it a very energy efficient dryer while also providing you with a dew point as low as -40C to -60C depending on model and application.
Working Principle of Internally Heated Air Dryer
- Adsorption Phase: Compressed air enters the online tower using activated alumina or molecular sieve desiccant. Therefore, moisture is absorbed and dry air exits for use.
- Regeneration Phase: The offline tower has an electric heater that warms a small amount of dry purge air that will pass through the desiccant for moisture removal (the moisture that is adsorbed) from the desiccant material.
- Cooling & Depressurization: The offline tower is then cooled in preparation for the cycle switch, using the dry air, for cooldown before switching cycles to avoid thermal shock and spikes in the dew point.
- Cycle Switching: The automatic switch of the online and offline towers can be achieved using a timer or PLC control, and the automatic switch will help maintain continuous drying without interruption.
Main Features and Advantages of Internally Heated Air Dryer
- Low Purge Loss: Uses only 5–7% of purge air instead of a heatless dryer’s 15–20%.
- Excellent Dew Point Stability: Achieve dew points of –40°C to –60°C, perfect for critical applications.
- Energy Efficient: Electric heaters are the most efficient way to regenerate the desiccant and lower energy costs.
- Built to Last: Rugged design for continuous 24/7 industrial operation.
- Easy Maintenance: Skid-mounted, module design allows for quick servicing.
- Lower Operating Cost: Less air loss yields higher efficiency and more savings.
- Automated Control: PLC-based control system to manage the timing of the dryer cycle, monitor the temperature, and provide alarms for any faults.
Technical Specifications of Internally Heated Air Dryer
| Parameter | Typical Value |
|---|---|
| Flow Capacity | 10 – 5,000 Nm³/hr (customizable) |
| Dew Point | –40°C to –60°C |
| Working Pressure | Up to 10 kg/cm² |
| Purge Air Consumption | 5–7% of rated flow |
| Heater Power | 2 – 18 kW (depending on size) |
| Power Supply | 415V, 50Hz, 3 Phase |
| Regeneration Type | Internal Electric Heating + Dry Air Purge |
| Cycle Time | 4–8 hours (adjustable) |
| Mounting Type | Skid or Floor Mounted |
Uses of Internally Heated Air Dryers
- Pharmaceutical & Biotech Industry – Clean Dry Air for manufacturing and packaging.
- Food & Beverages Industry – Prevent contamination due to moisture.
- Chemical and Petrochemical Plants – Stability in processes prevents corrosion on equipment.
- Automotive & Engineering Plants – Moisture free air for automated tools, perspiring or for paint purposes.
- Textiles & Paper Industry – Eliminates moisture related clumping & defects in production line.
- Electronics Manufacturing – Dry air prevents short circuits or condensation on parts.
Reasons to Select Harsiddhi Air Solution
- An Industry Leading Manufacturer with many years of experience in compressed air and gas drying systems.
- Certified quality management systems governed by ISO 9001:2015 & ISO 13485:2016.
- Custom solutions designed for your required pressure, flow and dew point.
- Energy Saving Solutions to reduce your operational costs and carbon footprint.
- A complete after sales service from design and install to maintenance and support.
- Proven Reliability – a trusted name, chosen by top Industries from across India for reliable, long-life systems.
Q1: What distinguishes a heatless air dryer from an internally heated air dryer?
A: The notable distinction is energy efficiency — an internally heated dryer has heaters and uses less purge air being, (5–7%) when compared to a heatless dryer (15–20%), resulting in less air loss and reduced drying expense.
Q2: What dew point can an internally heated dryer produce?
A: The dew point can be produced typically between –40°C to –60°C, depending on the operating conditions and the configuration of the model.
Q3: What industries benefit from an internally heated dryer?
A: An internally heated dryer can be used in any industry but is ideal for industries that require continuous air free of moisture — for example, industries such as pharmaceuticals, petrochemicals, food, electronics, and automotive.
Q4: How often will the desiccant need to be changed?
A: Based on air quality and operating conditions, your desiccant will last usually 2-3 years until you will need to change.
Q5: How do I select the right size dryer for my system?
A: We will size your dryer based on your flow rate, inlet temperature, operating pressure, and dew point requirement backed by our recommendation to procure your dryer for maximum efficiency.
Q6: Can internally heated dryers be automated?
A: Yes. All our dryers are configured with PLC-based control systems that take care of signal automation for cycle timing, heater operation and alarm status.
Q7: Is it hard to install an internally heated dryer?
A: Absolutely not. Harsiddhi Air Solution provides plug-and-play skid-mounted systems that can easily be mounted and connected lack of technical expertise.
Get a Reliable, Energy-Efficient Air Drying Solution
Obtain a Trustworthy and Energy-Efficient Heating Solution with Air Drying Process If you require a trustworthy, energy-efficient internally heated air dryer, Harsiddhi Air Solution is your reliable partner in industrial air and gas systems.
Location:
B-26, Ved Industrial Park-2, Kathwada, Ahmedabad, India
Talk to Us: +91 9023435128
Drop email: info@harsiddhiairsolution.com