DRIC Clean Air Towers

How do ductless clean air towers capture industrial welding fumes and purify workshop air without complex ductwork?

Operating on an advanced ambient recirculating process, a fume extraction tower for welding captures toxic metal smoke directly at the overhead thermal layer. Engineered by DRIC, this ductless clean air tower (also serving as a standalone industrial air purification tower) draws polluted air through a 360° top-suction inlet at a height of approximately 3.6m. Featuring an integrated spark-isolating pre-treatment system that filters ＞0.3μm heavy particles at up to 99.5% efficiency, high-efficiency cartridge filters, and smart PLC scheduling, DRIC towers deliver flexible, high-capacity air cleaning across centralized welding halls, multi-process stations, and specialty alloy fabrication.

1. Structural Comparison: Top-Suction vs. Bottom-Suction Systems

Model	LW-C-1609X	LW-C-1608S
Approximate Size (W*L*H)	1700*1400*3790 mm	1400*1260*3790 mm
Process Ability	16000m³/h	12000m³/h
Filter Area	243 ㎡	128㎡
Noise	≤80dB	≤80dB
Motor Power	15Kw	15Kw

*notice：To choose the optimal standalone industrial air purification towerfor your facility, please contact our experts to get more details.

2. Step-by-Step Working Principle: The Internal Purification Cycle

Every DRIC ductless clean air tower cleans industrial workshop air through a structured 4-stage internal process:

1.Top-Level 360° Thermal Fume Capture

Polluted exhaust containing welding smoke and fine particulates rises naturally toward the ceiling. The air intake, positioned at the top of the tower at approximately 3.6 m, pulls in rising fumes from all directions across a full 360° angle, eliminating capture dead ends.

2.Pre-Treatment Spark Isolation & Heavy Particle Separation

Air passes into an integrated pre-treatment system designed to knock down heavy dust particles and arrest hot sparks. For dust particles with a diameter of ≥ 50 μm, the pre-treatment separation efficiency reaches up to 80%, protecting internal media from fire risks and premature clogging.

3.High-Efficiency Cartridge Filtration in the Clean Room

Pre-treated exhaust enters the clean room section housing high-efficiency PTFE filter cartridges. Sub-micron fumes and metal oxides are trapped on the cartridge surface, while an automated reverse pulse-jet system periodically releases compressed air to knock dust down into the mobile ash collection box at the base.

4.Low-Velocity Clean Air Recirculation

Filtered, clean air passes into the fan acoustic chamber and is gently discharged back into the workshop through side outlets at low velocity. This creates an efficient indoor recirculation loop that preserves indoor heating or cooling energy.

(ductless air clean tower working principle)

3. Key Applications & Core Selling Points of DRIC Clean Air Towers

DRIC fume extraction towers for welding deliver flexible air purification across diverse industrial manufacturing scenarios:

• Centralized Welding Workshops: High-volume filtration for multi-station continuous manual welding, automated robotic welding cells, and large-scale structural steel fabrications where overhead cranes make fixed suction arms impossible.

• Mixed Metalworking Operations: Efficiently purifies mixed dust and smoke generated in combined welding and grinding cells or laser cutting and welding facilities.

• Specialty Alloy Fabrication: Effectively filters fine, toxic fumes generated during aluminum alloy welding and copper alloy processing.

• 360° Collection Without Dead Ends: Top-mounted suction louvers capture rising thermal plumes continuously across the full 360° perimeter.

• Ductless & Highly Mobile Design: Built with heavy-duty casters and zero external pipe requirements, allowing factories to move units easily whenever production line layouts change.

• Intelligent Control System & Reservation Feature: Outfitted with an intuitive PLC touchscreen control system featuring an automated equipment reservation function, allowing scheduled power-on/power-off cycles to save energy.

4. FAQ

Q: How does the top air intake design improve fume collection efficiency?

A: Welding processes generate significant heat, causing welding fumes to rise rapidly toward the ceiling in a natural thermal plume. By placing the air intake at the top of the tower at a height of approximately 3.6m, the DRIC tower intercepts and ingests rising fumes at their natural accumulation zone before they disperse laterally across the workshop.

Q: How does the DRIC tower protect its filters from hot sparks during welding and grinding?

A: Before entering the filter chamber, exhaust air flows through an internal pre-treatment system. This stage acts as a spark barrier and pre-separator, capturing up to 99.5% of dust particles ＞0.3μm in size. Hot sparks are safely extinguished and knocked down into the bottom ash collection box before reaching the delicate high-efficiency filter cartridges.

Q: What advantages does the DRIC intelligent control system offer?

A: The DRIC PLC intelligent control system provides a user-friendly touchscreen interface to monitor operating pressure, differential pressure filter status, and fault alerts. Its built-in equipment reservation function enables operators to schedule automatic system startups prior to shifts and automatic shutdowns afterward, optimizing workshop air quality while reducing overall power usage.