Duct-mounted Sterilization and Dust-Removal Purification Modules

The Air Duct Electrostatic Dust Removal Device is a modular, embedded air purification device designed to integrate directly with central air conditioning, fresh air, ventilation, and industrial supply/return air duct systems. As a standardized post-treatment purification module for HVAC systems, it integrates primary dust filtration, high-voltage electrostatic precipitation, UV sterilization, odor removal, and air circulation optimization functions, leveraging existing duct airflow to achieve comprehensive air purification.

Unlike traditional standalone air purifiers, this equipment requires no dedicated indoor space and enables integrated air path purification. It addresses critical industry pain points including long-term dust accumulation in ductwork, contaminated air supply, bacterial growth, residual odors, and poor indoor air quality. Widely deployed in commercial buildings, underground spaces, industrial facilities, rail transit, tunnel ventilation, and medical clean rooms, it has become the core supporting equipment for green upgrades and air quality improvement of ventilation systems.

Operating Principle

Featuring a square duct modular structure, the purification section can be directly connected in series to existing ventilation pipelines without modifying the original duct layout or fan system. 

The purification process follows three sequential stages:

1. Primary Interception: Air flowing through the duct first enters the pre-filter module, which captures large floating dust, fiber flocs, insects, and debris.

2. High-Voltage Electrostatic Precipitation: The pre-treated air then passes through a high-voltage electrostatic field that ionizes and adsorbs PM2.5, ultrafine dust, smoke particles, and suspended particulates.

3. UV Sterilization and Purification: Finally, air flows through the UV sterilization module, which destroys the structure of bacteria, viruses, and other microorganisms while decomposing some VOCs and odor molecules.

The result is clean, sterile, low-dust fresh air delivered throughout the space, achieving the "ventilation equals purification" effect.

Core Advantages

1. Duct-Embedded Integration: Space-Saving and Easy Retrofit

This Duct-mounted Sterilization and Dust-Removal Purification Modulesadopts a standard duct modular design with dimensions matching conventional HVAC duct specifications. It can be directly installed in series in main ducts, branch ducts, fresh air inlets, or return air outlets. No separate equipment room is required, no indoor floor or ceiling space is occupied, and no modifications to the original fan system are necessary. It is equally suitable for new ventilation projects and retrofitting of existing duct systems. Compared to floor-standing or wall-mounted purifiers, the integrated duct design is cleaner and more aesthetically pleasing, making it ideal for standardized construction in large commercial, industrial, and municipal projects with exceptional installation compatibility.

2. Multi-Stage Composite Purification: Combined Dust Removal and Sterilization

The equipment delivers four-in-one functionality: dust removal, sterilization, odor elimination, and air purification:

· Primary filter layer: Intercepts hair, lint, and large particulate impurities

· High-voltage electrostatic module: Efficiently captures ultrafine dust as small as 0.01μm, haze particles, and smoke, achieving over 90% particulate purification efficiency

· UV sterilization module: Continuously inactivates airborne microorganisms including E. coli, Staphylococcus aureus, influenza viruses, and mold spores, effectively preventing bacterial growth and cross-contamination in ductwork

· Odor control: Adsorbs and decomposes stale odors, moldy smells, and minor exhaust odors accumulated in ventilation systems over time

This comprehensive approach completely solves the problems of turbid, odorous, and bacteria-laden air supply from traditional duct systems.

3. Low Air Resistance: No Impact on Airflow or Fan Load

Traditional filter-based duct purification modules feature thick filter layers that create high air resistance, leading to reduced airflow, weak air supply, increased fan load, and higher energy consumption. In contrast, the duct-type sterilization and dust removal purification section adopts an open electrostatic field structure with unobstructed air passages and extremely low resistance. It has virtually no impact on the original duct air pressure and airflow, causing no air supply attenuation or increased static pressure. The ventilation system maintains its original efficiency after installation, operates smoothly, and adds no additional energy consumption—making it ideal for 24-hour continuous ventilation applications.

4. Consumable-Free and Washable: Extremely Low Maintenance Costs

The core purification unit utilizes a metal electrostatic plate structure with no HEPA filters or activated carbon consumables. This completely eliminates the disadvantages of traditional duct purification equipment such as frequent filter replacement, clogging, bacterial accumulation, and secondary dust emission. Dust and dirt accumulated during long-term operation can be easily removed by periodic disassembly, washing, and air-drying, with core components reusable indefinitely. The equipment features a robust structure that resists moisture and aging, adapting well to the constant temperature and high humidity conditions inside closed ducts. With extremely low failure rates, it significantly reduces long-term maintenance costs for property management, municipal facilities, and industrial plants.

5. Eliminates Secondary Duct Contamination: Long-Term Air Quality Improvement

After prolonged use, conventional central air conditioning and ventilation systems accumulate dust, condense moisture, and develop mold colonies on internal surfaces. The air supply then carries dust, mold, and odors into indoor spaces, causing air turbidity and respiratory discomfort. The duct-type purification section provides continuous dynamic sterilization and dust removal for flowing air, intercepting pollutants at the source and inhibiting microbial growth within the ductwork. This maintains clean duct interiors, eliminates secondary air supply contamination, and ensures long-term delivery of clean fresh air, effectively improving overall indoor air quality.

6. Full-Condition Adaptability: Safe, Stable and Durable

Constructed with industrial-grade metal housing, the equipment is fireproof, corrosion-resistant, and dustproof, adapting to complex working conditions in shopping malls, underground spaces, tunnels, factories, and hospitals. It incorporates comprehensive safety protection features including high-voltage overload protection, leakage protection, and power failure safety protection. Installed and operated within sealed ducts, there is no UV light leakage or high-voltage safety hazard. Capable of 24/7 uninterrupted operation throughout the year, it adapts to various complex ventilation environments with high airflow, high dust levels, and high humidity, offering long service life and exceptional stability.

Primary Application Scenarios

1. Commercial Central Air Conditioning Systems

Widely used in the supply and return air ducts of central air conditioning systems in office buildings, shopping malls, hotels, convention centers, stadiums, and other large public buildings. It addresses problems of floating dust, dander, and bacterial cross-transmission caused by dense human occupancy in enclosed public spaces, improving the common issues of turbid, stuffy, and odorous air supply from air conditioning systems and enhancing public environment comfort.

2. Underground Space Ventilation Systems

Suitable for humid, poorly ventilated, dusty, and mold-prone underground enclosed spaces such as underground parking garages, pedestrian tunnels, underground shopping malls, and civil air defense works. It effectively removes dust, mold odors, and sterilizes the air, solving the problems of damp, turbid air, low visibility, and strong odors in underground spaces, equipping underground ventilation systems with purification capabilities.

3. Tunnel and Transportation Ventilation Projects

Can be connected in series to tunnel fresh air ducts, exhaust ducts, and shaft ventilation systems. It assists tunnel fresh air purification systems in pre-treating exhaust dust, intercepting large traffic dust particles and suspended smoke, reducing the load on main purification equipment, and improving overall tunnel ventilation and purification efficiency. It is ideal for green renovation projects of urban and highway tunnels.

4. Industrial Plant Supply Air Purification

Applicable to the fresh air supply ducts of electronic workshops, packaging workshops, light manufacturing facilities, and precision machining plants. It filters dust impurities from incoming fresh air and kills airborne microorganisms to maintain workshop cleanliness. It also adapts to workshop exhaust purification, reducing discharged dust concentrations to meet environmental emission requirements.

5. Healthcare and Educational Public Spaces

In hospital wards, corridors, consultation rooms, school classrooms, libraries, and other scenarios with high air hygiene requirements, installing duct-type sterilization and dust removal purification sections provides continuous sterilization and dust removal. This reduces the transmission risk of influenza and respiratory pathogens, creating a clean and healthy public ventilation environment.

Conclusion

As an integrated modular purification device for ductwork, the Duct-Type Sterilization, Dust Removal & Purification Section overcomes the limitations of traditional ventilation systems that "only ventilate without purification, accumulate dust and mold, and deliver contaminated air." With its core advantages of duct-embedded installation, no airflow reduction, consumable-free washable operation, integrated sterilization and dust removal, low maintenance, and high safety, it can quickly upgrade ordinary ventilation ducts to purification-type fresh air ducts without modifying the original ventilation system structure.

Suitable for commercial, municipal, transportation, industrial, and medical applications, it has become the mainstream supporting product for improving efficiency and implementing green energy-saving transformations of ventilation systems, offering exceptional engineering implementation value and widespread adoption significance.