Efficient Dryer Ventilation with Sly’s Custom Collector
Industry: Limestone Processing
Application
Fluid Bed Dryer Ventilation and Dust Collection
Case Study Highlights
Customized STJ-4717-10 TubeJet® collector
Managed 62,000 ACFM airflow
Reduced inlet abrasion effectively
Recycled fines into processing cycle
Filter bags lasted 22 months
Met air pollution standards
The Challenge:
Managing Dryer Emissions and Material Recovery
A limestone supplier needed to meet air pollution emission limits while improving production efficiency. The facility required a dust collection solution capable of collecting and recycling fines generated during the drying and cooling process of a fluid bed dryer.
Problems included:
- Excess fines released during drying and cooling
- Need to meet emission regulations
- High airflow ventilation requirements
- Abrasive inlet loading conditions
Previous collectors required annual filter replacements, creating maintenance difficulties. Some systems are also exhausted through roof stacks, increasing permitting requirements and operational complexity.
The customer also required a system capable of handling varying inlet loading conditions while maintaining long-term reliability and efficient operation.
The Solution:
Customized TubeJet® Collector for Dryer Ventilation
Sly worked directly with the customer through multiple technical meetings to develop a customized dust collection system tailored to the dryer application. An STJ-4717-10 TubeJet® collector was selected and modified to fit the facility’s airflow and space requirements.
This approach provided several advantages:
- Customized clean air plenum design
- Large outlet accommodated 62,000 ACFM airflow
- Abrasion-resistant inlet diffuser construction
- Demand-based cleaning reduced compressed air usage
Because of the collector’s large size, Sly also furnished a trough hopper, screw conveyor, and rotary valve to provide single-point discharge of collected material back into the limestone processing cycle.
System Specifications
Collector Model
STJ-4717-10 TubeJet® collector
Air-to-Cloth Ratio
5.2:1 operating ratio
Airflow Capacity
62,000 ACFM handling capability
Inlet Velocity
Below 3,000 FPM design
Abrasion Protection
Abrasion-resistant steel diffuser
Monitoring Equipment
Differential pressure and broken bag detection
The Results:
Reliable Long-Term Performance and Efficient Dust Collection
The customized dust collection system efficiently processed material while meeting air pollution control standards and supporting long-term operational reliability.
Key Results:
- Met air pollution emission limits
- Recycled collected fines into production
- Reduced compressed air consumption
- Extended filter bag service life
- Achieved 22 months continuous bag operation
The collector has operated successfully since the summer of 2013 with excellent reported performance.
Why STJ-4717-10 TubeJet® Collectors Work for Fluid Bed Dryer Applications
The STJ-4717-10 TubeJet® collector was well-suited for this fluid bed dryer application because it could accommodate high airflow rates while maintaining efficient dust collection. The customized plenum, abrasion-resistant components, and flexible cleaning controls allowed the system to manage demanding inlet conditions and varying loading rates while supporting long-term filter life and operational efficiency.
FAQs
What is a TubeJet® dust collector used for?
TubeJet® dust collectors capture airborne particulate from industrial processes while maintaining airflow and supporting emissions compliance
Why is abrasion resistance important in dryer dust collection systems?
Abrasion resistance helps protect collector components from wear caused by high-volume particulate loading and abrasive materials.
How does demand-based filter cleaning improve performance?
Demand-based cleaning reduces compressed air usage and can extend filter bag life by cleaning only when pressure drop conditions require it.
Can collected fines be returned to the production process?
manufacturing process.
What industries use customized dust collectors?
Customized dust collectors are commonly used in industries including minerals processing, cement, aggregates, chemicals, food processing, and manufacturing.
Why Sly?
Sly designs and manufactures industrial dust collection systems engineered for customized application requirements. With experience across a wide range of industrial processes, Sly provides fabric filter dust collectors, baghouses, cartridge collectors, wet scrubbers, bulk loading spouts, and aftermarket parts tailored to specific operational needs. All products are engineered and fabricated to order in Sly’s manufacturing facility in Mathiston, Mississippi.