Thermal Plant Boiler Preservation with Dry Air
Project: MDC-5000 SPECIA
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The Challenge
Preventing Corrosion & Moisture Damage in Thermal Power Plant Boilers
Preserving heat and power plant equipment is essential to prevent corrosion, moisture damage, and deterioration. Traditional preservation methods, such as applying chemical protective coatings, have several drawbacks:
- The protective film degrades over time, leaving surfaces exposed to moisture.
- Continuous chemical monitoring is required to maintain safety.
- Environmental concerns arise due to chemical disposal.
- Equipment repairs are hindered when humid air enters the system.
A more efficient, cost-effective, and sustainable solution was needed to extend the service life of boilers, turbines, and steam circuits in thermal power plants.
The Solution
Industrial Desiccant Dehumidifier for Dry Air Purging
DT Group engineers, in collaboration with Zmievsky Thermal Power Plant (TPP) in Ukraine, determined that dry air purging was the most effective way to preserve the boiler system and prevent corrosion.
To achieve this, DT Group designed a customized MDC-5000 desiccant dehumidifier, specifically engineered to maintain low-humidity conditions inside the boiler’s extensive network of heat exchange tubes.
- Powerful Airflow System – The unit was equipped with a booster fan delivering 5,000 Pa external static pressure to ensure efficient air circulation through kilometers of boiler tubing.
- Mobile & Flexible Design – The system was mounted on a wheeled frame with hooks and handles, allowing easy transport and deployment for on-demand preservation of different equipment.
Key Features of the MDC-5000 SPECIAL Desiccant Dehumidifier
- Integrated Air Handling & Dehumidification System – A 2-in-1 unit for efficient dry air purging.
- Advanced Air Quality Control – Maintains precise humidity, temperature, and air purity, featuring HEPA H13 filtration for dust and contaminants.
- Smart Remote Monitoring – Web-based control system for real-time humidity tracking and performance optimization.
- Weatherproof & Industrial-Grade – Designed for outdoor use, ensuring durability and reliability in harsh conditions.

The Results
Improved Equipment Longevity & Reduced Maintenance Costs
With the implementation of the MDC-5000 SPECIAL industrial desiccant dehumidifier, Zmievsky TPP successfully:
- Eliminated moisture-related damage in its boiler system.
- Reduced corrosion risk without using hazardous chemicals.
- Improved equipment longevity, leading to lower maintenance and repair costs.
- Enhanced operational efficiency, providing a cost-effective preservation solution.
By integrating industrial-grade desiccant dehumidification, thermal power plants can ensure long-term equipment protection, reduce downtime, and achieve a sustainable, energy-efficient preservation process.